Position detector and linear conveying system

Abstract

Position detector (5), comprising: a position detection-specific magnet (6) which can be installed on a runner (4) for movement along a conveying path (2) comprising a stator (3); a position detection unit (7) that can be installed on the transport route (2) and which detects a magnetic field generated by the position detection-specific magnet (6); several magnetic shielding elements (8) which can be arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein a level difference (11) exists between the adjacent magnetic shielding elements (8A, 8B), which are offset in a second direction (B) which is orthogonal to the first direction (A), and the gap-specific magnetic shielding element (9) is bent along the level difference (11) and is in contact with the adjacent magnetic shielding elements (8A, 8B).

Description

Area

[0001] The present disclosure relates to a position detector which detects a runner position and a linear conveying system. background

[0002] A conventional linear servomotor consists of a rotor and a stator. The rotor is configured to include a base and a rotor magnet attached to the base, which generates a magnetic field to move the rotor. The stator is configured to include a stator core and a coil attached to the stator core, which also generates a magnetic field to move the rotor. In the linear servomotor, the stator coil generates the magnetic field when power is applied. This magnetic field creates a driving force, which moves the rotor. Linear servomotors are installed in systems such as linear conveyor systems for transporting items.

[0003] Linear conveying systems equipped with linear servomotors generally use a magnetic position detector to determine the position of the runner. The position detector comprises a position-detection-specific magnet mounted on the runner to generate a magnetic field for position detection, and a position detection unit that detects the magnetic field generated by the position-detection-specific magnet.

[0004] If a magnetic flux generated by the rotor magnet and the coil interferes with the position detection unit, the position detector cannot accurately detect the magnetic field generated by the position detection-specific magnet, leading to the problem of reduced rotor detection accuracy. Such a problem is reduced by a technique disclosed in patent literature 1. In the disclosed technique, a magnetic shielding element arranged between a stator and position detection units serves as a shield against a magnetic flux traveling from coils to the position detection units.

[0005] Patent document 2 discloses a technique for preventing magnetic stray fluxes at joints of sheets made of a high-permeability alloy for a magnetically shielded space, which consists of providing additional shielding elements that cover the joints. Patent document 3 discloses a technique that prevents a magnetic field from penetrating a target area. For this purpose, a structure arranged between a magnetic field-generating space and the target area comprises a shielding material that covers at least a portion of the target area and a magnetic damping material that is arranged around the shielding material in the target area and exhibits higher magnetic losses than the shielding material. Citation list of patent literature Patent literature 1: WO 2021 / 124 439 A1 and DE 11 2019 007 974 T5 Patent literature 2: JP 2000 - 183 580 A Patent literature 3: JP 2016 - 157 776 A Brief description of the invention Problem to be solved by the invention

[0006] When the runner, as in a linear conveying system, moves over a long distance, it is necessary to provide a stator and a magnetic shielding element, each divided into several parts, and to arrange and install the multiple stators in one conveying direction during assembly of the linear conveying system. Even if the multiple magnetic shielding elements are arranged and installed without gaps, unavoidable size and assembly tolerances, etc., result in a gap between adjacent magnetic shielding elements. The magnetic flux generated by the runner magnet and the coil travels through this gap toward the position detection unit and therefore interferes with its operation. For this reason, the technology disclosed in patent literature 1 has room for improvement with regard to enhancing the accuracy of the runner position detection.

[0007] The present disclosure was made in consideration of the above, and one objective of the present disclosure is to obtain a position detector configured to prevent a magnetic flux generated by a rotor magnet and coils from disturbing a position detection unit through a gap, and to improve its accuracy of a rotor position detection compared to a conventional position detector. Means to solve the problem

[0008] The above problem is solved by a position detector and a linear conveying system according to the independent claims. Effects of the invention

[0009] The position detector and the linear conveying system according to the invention each ensure that the magnetic flux generated by the rotor magnet and the coils is prevented from disturbing the position detection unit through the gap, and that its accuracy of rotor position detection is improved compared to a conventional position detector. Brief description of the drawings Fig. Figure 1 is a top view showing an entire linear conveying system according to a first embodiment. Fig. Figure 2 is a sectional view showing the linear conveying system according to the first embodiment. Fig. Figure 3 is a top view showing the linear conveying system according to the first embodiment. Fig. Figure 4 is a side view showing the linear conveying system according to the first embodiment. Fig. Figure 5 is an explanatory diagram showing an effect of the linear conveying system according to the first embodiment. Fig. Figure 6 is a side view showing a linear conveying system according to a second embodiment. Fig. Figure 7 is a side view showing a linear conveying system according to a third embodiment. Fig. Figure 8 is a side view showing a linear conveying system according to a fourth embodiment. Fig. Figure 9 is a side view showing a linear conveying system according to a fifth embodiment. Fig. Figure 10 is a side view showing a linear conveying system according to a sixth embodiment. Description of embodiments

[0010] With reference to the drawings, a detailed description of position detectors and linear conveying systems according to embodiments is given below. First embodiment.

[0011] Fig. Figure 1 is a top view showing an entire linear conveying system 1 according to a first embodiment. Fig. Figure 2 is a sectional view showing the linear conveying system 1 according to the first embodiment. The linear conveying system 1 is a system that uses a linear servo motor to convey articles. As shown in Fig. As shown in Figure 1, the linear conveying system 1 comprises several runners 4 and a conveying path 2, which includes several stators 3. ... Fig. As shown in Figure 2, the linear conveying system 1 also includes a position detector 5. Although not shown, the linear conveying system 1 includes a control unit which controls the movement of the runners 4.

[0012] Fig. Figure 2 shows a section perpendicular to the directions of movement, which are the directions of movement of the runners 4 along the transport path 2. The following description defines the directions of movement, which are the directions of movement of the runners 4 along the transport path 2 and the directions which relate to the drawing surface of Fig. Directions that are perpendicular to the first directions A are called the second directions B. Directions that are orthogonal to both the first directions A and the second directions B are called the third directions C. In the following description, the second directions B are also defined as the vertical directions. In the following description, the second direction B is defined as having an upward direction towards the top of the drawing and a downward direction towards the bottom of the drawing. For the purpose of explanation, in Fig. Two sections of a stator core 3a of the stator 3 and a housing 4a and a base 4b of the rotor 4 are hatched, all of which are described later.

[0013] The in Fig. The transport path 2 shown in Figure 1 has a path shape with straight and curved sections; however, the shape can be changed as needed. For example, the shape of transport path 2 can be straight and curved, it can be a different shape with a straight section and a curved section, or it can be divided into several paths at a point. As shown in Figure 1, the transport path 2 can be straight and curved, or it can be a different shape with a straight section and a curved section. Fig. As shown in Figure 2, the conveying path 2 includes the stator 3. Although not shown, the conveying path 2 includes a base element and supports, wherein the base element holds the stators 3, position detection units 7 (described later), and magnetic shielding elements 8 (described later), and the supports are arranged between the base element, the stators 3, the position detection units 7, and the magnetic shielding elements 8. During assembly of the conveying path 2, the stators 3, the position detection units 7, and the magnetic shielding elements 8 can be attached to the same support, and this support can then be attached to the base element.Alternatively, during the assembly of the conveying path 2, the stators 3 can be attached to one of the brackets, the position detection units 7 and the magnetic shielding elements 8 can be attached to the other bracket, and then the brackets can be attached to the base element.

[0014] Fig. Figure 3 is a top view showing the linear conveying system 1 according to the first embodiment. Fig. Figure 4 is a side view showing the linear conveying system 1 according to the first embodiment. As in Fig. As shown in Figure 3, the stators 3 are divided in the first direction A. The stators 3 shown in the drawing are two in number; however, this example is not intended to limit the number of stators 3. The multiple stators 3 are arranged and installed in the first direction A. The adjacent stators 3 are arranged continuously. Each stator 3 comprises the stator core 3a and several coils 3b.

[0015] The stator core 3a comprises a core back 3c and several teeth 3d. The core back 3c extends in the first direction A. The several teeth 3d project from an end of the core back 3c facing the rotor 4 in the third direction C. The several teeth 3d are arranged at intervals in the first direction A.

[0016] One of the several coils 3b is provided at each of the several teeth 3d. In other words, the several coils 3b are formed from wires, each of which is wound around one of the several teeth 3d.

[0017] The runners 4 are components that move along the conveying path 2 and, together with the stators 3, form the linear servo motor. As in Fig. As shown in Figure 2, each runner 4 comprises the housing 4a, the base 4b and a runner magnet 4c.

[0018] The housing 4a is a plate-shaped element that holds the base 4b. The housing 4a extends in the second direction B. The housing 4a extends further in the second direction B than the stators 3.

[0019] The base 4b is a plate-shaped element attached to a surface of the housing 4a facing the stator 3. The base 4b is located near one end of the housing 4a in the second direction B. The position of the base 4b and the position of the stator 3 in the second direction B are aligned. The base 4b faces the stator 3 in the third direction C. The base 4b extends in the second direction B.

[0020] The rotor magnet 4c is a component that generates a magnetic field for moving the rotor 4. The rotor magnet 4c is, for example, a permanent magnet. The rotor magnet 4c is attached to a surface of the base 4b facing the stator 3. The rotor magnet 4c is attached to the housing 4a via the base 4b. The position of the rotor magnet 4c and the position of the stator 3 in the second direction B are aligned. The rotor magnet 4c faces the stator 3 in the third direction C and is positioned away from the stator 3 in the third direction C. The rotor magnet 4c extends in the second direction B.

[0021] The rotor magnet 4c comprises a magnetic field generating surface 4d where the magnetic field is generated. In the present embodiment, the magnetic field generating surface 4d of the rotor magnet 4c is the surface facing the stator 3 and extending in the second direction B. The magnetic field generating surface 4d is a flat surface that is orthogonal to the third direction C. An electric current flows through the coil 3b, thereby generating a magnetic field. This magnetic field causes a driving force on the rotor magnet 4c, enabling the rotor 4 to move. As shown in Fig. As shown in Figure 3, several rotor magnets 4c are attached to the single base 4b. The multiple rotor magnets 4c are arranged at intervals in the first direction A. The rotor magnets 4c shown in the drawing number three; however, this example is not intended to limit the number of rotor magnets 4c. The multiple rotor magnets 4c need not be arranged at intervals.

[0022] As in Fig. As shown in Figure 2, the position detector 5 comprises a position detection-specific magnet 6, the position detection unit 7, the magnetic shielding element 8, and a gap-specific magnetic shielding element 9. The position detector 5 is a device that detects the position of each runner 4.

[0023] The position detection magnet 6 is a magnet that generates a magnetic field for detecting the position of the rotor 4. The position detection magnet 6 is, for example, a measuring magnet with multiple magnetic poles. The position detection magnet 6 is installed on the rotor 4. The position detection magnet 6 is attached to the surface of the housing 4a facing the stator 3. The position detection magnet 6 is positioned near an opposite end of the housing 4a in the second direction B, with the opposite end being opposite the end near which the base 4b is located. The position detection magnet 6 is located away from the stator 3 in the second direction B. The position detection magnet 6 is located away from the rotor magnet 4c in the second direction B. The position detection magnet 6 extends in the third direction C.

[0024] The position-detection-specific magnet 6 comprises a magnetic field-generating surface 6a where the magnetic field is generated. In the present embodiment, the magnetic field-generating surface 6a of the position-detection-specific magnet 6 faces the position detection unit 7 and extends in the third direction C. The magnetic field-generating surface 6a is a flat surface that is orthogonal to the second directions B. The magnetic field-generating surface 4d of the rotor magnet 4c and the magnetic field-generating surface 6a of the position-detection-specific magnet 6 are orthogonal to each other.

[0025] The position detection unit 7 is installed on the conveyor path 2 and detects the magnetic field generated by the position detection-specific magnet 6. The position detection unit 7 is arranged in the second direction B between the stator 3 and the position detection-specific magnet 6. The position detection unit 7 is arranged away from the stator 3 in the second direction B. The position detection unit 7 is arranged away from the rotor magnet 4c in the second direction B.

[0026] As in Fig. As shown in Figure 4, the multiple position detection units 7 are arranged at intervals in the first direction A. The position detection units 7 shown in the drawing have a number of two; however, this example is not intended to limit the number of position detection units 7. Each position detection unit 7 comprises a substrate 7a and multiple magnetic sensors 7b attached to the substrate 7a. The magnetic sensors 7b are, for example, magnetoresistive elements or Hall elements. The multiple magnetic sensors 7b are arranged at intervals in the first direction A. Each magnetic sensor 7b is attached to a surface of the substrate 7a facing the position detection-specific magnet 6. As shown in Figure 4, the magnetic sensors 7b are arranged at intervals in the first direction A. Fig. As shown in Figure 2, the positions of the position-detection-specific magnet 6 and the magnetic sensor 7b are aligned in the third direction C. The magnetic sensor 7b faces the position-detection-specific magnet 6 in the second direction B. The magnetic sensor 7b is positioned away from the position-detection-specific magnet 6 in the second direction B.

[0027] As in Fig. As shown in Figure 4, the magnetic shielding elements 8 are divided in the first direction A. The magnetic shielding elements 8 shown in the drawing are two in number; however, this example is not intended to limit the number of magnetic shielding elements 8. The multiple magnetic shielding elements 8 are arranged and installed in the first direction A with a gap 10, providing shielding against a magnetic flux traveling from the rotor magnets 4c of the rotor 4 and the coils 3b of the stator 3 to the position detection unit(s) 7. One material of the magnetic shielding elements 8 is, for example, a magnetic material. Examples of the magnetic material include a cold-rolled steel plate, a carbon steel plate, for example S45C, and an electrical steel plate. Each magnetic shielding element 8 extends in the first direction A.In the present embodiment, each magnetic shielding element 8 is a plate-shaped element that is longer in the first direction A than in the second direction B. The magnetic shielding elements 8 are arranged in the second direction B between the rotor magnets 4c and the position detection units 7 and in the second direction B between the stators 3 and the position detection units 7.

[0028] In the example shown, a boundary position 12 of the adjacent stators 3 in the first direction A and a boundary position 13 of the adjacent magnetic shielding elements 8 in the first direction A are aligned, but cannot be aligned. To distinguish the adjacent magnetic shielding elements 8 in the following description, one magnetic shielding element 8 is referred to as magnetic shielding element 8A and the other magnetic shielding element 8 is referred to as magnetic shielding element 8B.

[0029] Preferably, the multiple magnetic shielding elements 8 are arranged and installed without gaps in the first direction A. However, when the multiple stators 3 are arranged and installed without gaps in the first direction A, in practice a gap 10 occurs between the adjacent magnetic shielding elements 8 due to unavoidable size and assembly tolerances and an intentionally provided gap to prevent problems caused by interference, etc. This gap 10 varies in size, ranging from large to small, without being immediately apparent. For the purpose of explanation, the gap 10 is shown larger here. The same applies to the following.

[0030] The gap-specific magnetic shielding element 9 is an element that closes the gap 10 between the adjacent magnetic shielding elements 8 to provide shielding against the magnetic flux traveling from the rotor magnets 4c and the coils 3b to the position detection unit(s) 7. Specifically, the gap-specific magnetic shielding element 9 is the element that provides shielding against the magnetic flux traveling from the rotor magnets 4c and the coils 3b through the gap 10 to the position detection unit(s) 7. A material for the gap-specific magnetic shielding element 9 is, for example, a magnetic material. Examples of magnetic materials include a cold-rolled steel plate, a carbon steel plate such as S45C, and an electrical steel plate.In the present embodiment, the gap-specific magnetic shielding element 9 is formed separately from the magnetic shielding elements 8. The gap-specific magnetic shielding element 9 extends in the first direction A. The gap-specific magnetic shielding element 9 is the plate-shaped element that is longer in the first direction A than in the second direction B.

[0031] The gap-specific magnetic shielding element 9 spans the gap 10 and is in contact with the two adjacent magnetic shielding elements 8. For example, the gap-specific magnetic shielding element 9 is screwed to the magnetic shielding elements 8. The magnetic shielding elements 8 and the gap-specific magnetic shielding element 9 can have the same thickness or different thicknesses. The material of the magnetic shielding elements 8 and the material of the gap-specific magnetic shielding element 9 can be the same or different.

[0032] With reference to Fig. Section 2 provides a detailed description of how the magnetic shielding elements 8, the rotor magnets 4c, the stators 3, and the position detection units 7 are arranged. A distance D1 is defined as the distance between the magnetic shielding element 8 and the rotor magnet 4c along the second direction B. In particular, distance D1 is the distance from a side of the rotor magnet 4c closer to the magnetic shielding element 8 in the second direction B to the magnetic shielding element 8. A distance D2 is defined as the distance between the magnetic shielding element 8 and the stator 3 along the second direction B. In particular, distance D2 is the distance from a side of the stator 3 closer to the magnetic shielding element 8 in the second direction B to the magnetic shielding element 8. A distance D3 is defined as the distance between the magnetic shielding element 8 and the position detection unit 7 along the second direction B.In particular, the distance D3 is the distance between the magnetic shielding element 8 and the magnetic sensor 7b of the position detection unit 7 along the second direction B. In the present embodiment, the magnetic shielding elements 8, the rotor magnets 4c, the stators 3, and the position detection units 7 are arranged such that both the condition that the distance D1 is shorter than the distance D3 and the condition that the distance D2 is shorter than the distance D3 are satisfied. The magnetic shielding elements 8, the rotor magnets 4c, the stators 3, and the position detection units 7 can be arranged such that the condition that the distance D1 is shorter than the distance D3 and / or the condition that the distance D2 is shorter than the distance D3 are / are satisfied.

[0033] Next, a description of the effects of the linear conveying system 1 according to the present embodiment is given.

[0034] As in Fig. As shown in Figure 4, the linear conveying system 1 of the present embodiment comprises the gap-specific magnetic shielding element 9, which closes the gap 10 between the adjacent magnetic shielding elements 8 and is configured to provide shielding against the magnetic flux that travels from the runner magnets 4c and the coils 3b to the position detection unit(s) 7. This configuration prevents the magnetic flux generated by the runner magnets 4c and the coils 3b from passing through the gap 10 to the position detection unit(s) 7. This configuration thus prevents the magnetic flux generated by the runner magnets 4c and the coils 3b from interfering with the position detection unit(s) 7 through the gap 10 and therefore enables improved accuracy of the position detection of each runner 4 compared to a conventional configuration.

[0035] Fig. Figure 5 is an explanatory diagram showing an effect of the linear conveying system 1 according to the first embodiment. Fig. 5. Solid arrows indicate a magnetic flux generated by the rotor magnet 4c and the coil 3b. In Fig. The gap-specific magnetic shielding element 9 is not shown for illustrative purposes. In the present embodiment, as in Fig. As shown in Figure 5, the stator 3 is arranged away from the position-detection-specific magnet 6 in the second direction B, and the position detection unit 7 is arranged between the stator 3 and the position-detection-specific magnet 6 in the second direction B. Furthermore, in the present embodiment, the magnetic shielding element 8 is arranged between the stator 3 and the position detection unit 7 in the second direction B. These configurations allow the magnetic flux generated by the coil 3b and the rotor magnet 4c to be returned to the stator core 3a through the magnetic shielding element 8.

[0036] In particular, a magnetic flux generated by coil 3b when it is energized flows through the rotor magnet 4c and then to the base 4b. When coil 3b is energized, a magnetic flux generated by the rotor magnet 4c also flows into the base 4b. Furthermore, a resulting magnetic flux flowing into the base 4b splits into two paths: one leading to the magnetic shielding element 8 and the other leading away from the magnetic shielding element 8 in the second direction B. The magnetic flux flowing from the base 4b to the magnetic shielding element 8 flows along the shielding element 8 and returns to the stator core 3a from an end of the stator core 3a that is oriented away from the rotor 4.The magnetic flux, which extends from the base 4b away from the magnetic shielding element 8 in the second direction B, travels around the stator 3 and then returns to the stator core 3a from the end of the stator core 3a that is oriented away from the rotor 4. This further reduces the interference of the position detection unit(s) 7 caused by the magnetic flux generated by the rotor magnets 4c and the coils 3b, and therefore enables a further improvement in the accuracy of the position detection of each rotor 4.

[0037] As in Fig. As shown in Figure 2, in the present embodiment the rotor magnet 4c is arranged in the second direction B away from the position detection unit 7, and the stator 3 is also arranged in the second direction B away from the position detection unit 7. Furthermore, in the present embodiment the magnetic shielding element 8 is arranged in the second direction B between the rotor magnet 4c and the position detection unit 7, and in the second direction B between the stator 3 and the position detection unit 7. In the present embodiment, the magnetic shielding elements 8, the rotor magnets 4c, the stators 3, and the position detection units 7 are arranged such that both the condition that the distance D1 is shorter than the distance D3 and the condition that the distance D2 is shorter than the distance D3 are met.These configurations can further improve the effect of returning the magnetic flux generated by the coil 3b and the rotor magnet 4c through the magnetic shielding element 8 to the stator core 3a. This further reduces the interference of the position detection unit(s) 7 by the magnetic flux generated by the rotor magnets 4c and the coils 3b, and therefore enables a further improvement in the accuracy of the position detection of each rotor 4.

[0038] As in Fig. As shown in Figure 2, in the present embodiment the magnetic field generating surface 4d of the rotor magnet 4c and the magnetic field generating surface 6a of the position detection-specific magnet 6 are orthogonal to each other. This configuration makes it less likely that the magnetic flux generated by the rotor magnet 4c will interfere with the position detection unit 7, and therefore allows for a further improvement in the accuracy of the position detection of the rotor 4. Second embodiment.

[0039] Next, with reference to Fig. 6 a description of a linear conveying system 1A according to a second embodiment is given. Fig. Figure 6 is a side view showing the linear conveying system 1A according to the second embodiment. In the present embodiment, the gap-specific magnetic shielding element 9 is configured differently from that of the first embodiment described above. The second embodiment overlaps with the first embodiment described above, and these overlapping parts have the same reference numerals and are not described further.

[0040] Preferably, the positions of the adjacent magnetic shielding elements 8 are aligned in the second direction B. In practice, however, due to size and assembly tolerances of the magnetic shielding elements 8 and their intended displacement, which is designed to avoid problems caused by disturbance of the magnetic shielding elements 8, etc., a level difference 11 can occur between the adjacent magnetic shielding elements 8. This level difference 11 varies in magnitude, ranging from significant to negligible, and is not immediately noticeable. For illustrative purposes, the level difference 11 is shown larger here. The positions of the adjacent magnetic shielding elements 8 in the second direction B are not aligned.In the present embodiment, the magnetic shielding element 8A is arranged closer to the stators 3 than the other magnetic shielding element 8B. The level difference 11 occurs between the adjacent magnetic shielding elements 8A and 8B, which are offset in the second direction B. The gap-specific magnetic shielding element 9 is bent along the level difference 11 and is in contact with the adjacent magnetic shielding elements 8A and 8B.

[0041] Next, a description of an effect of the linear conveying system 1A according to the present embodiment is given.

[0042] In the present embodiment, the level difference 11 is formed between the adjacent magnetic shielding elements 8A and 8B, which are offset in the second direction B, and the gap-specific magnetic shielding element 9 is bent along the level difference 11 and in contact with the adjacent magnetic shielding elements 8A and 8B. This configuration can eliminate a magnetic gap between the magnetic shielding elements 8A and 8B and the gap-specific magnetic shielding element 9 even when the level difference 11 occurs between the adjacent magnetic shielding elements 8A and 8B.In other words, because the gap-specific magnetic shielding element 9 is suitably bent along the level difference 11 between the adjacent magnetic shielding elements 8A and 8B and is in contact with the adjacent magnetic shielding elements 8A and 8B, the magnetic gap between the magnetic shielding elements 8A and 8B and the gap-specific magnetic shielding element 9 can be eliminated. This prevents a magnetic flux generated by the runner magnets 4c and the coils 3b from interfering with the position detection unit(s) 7 and enables improved position detection accuracy for each runner 4 compared to a conventional configuration, even when the level difference 11 between the adjacent magnetic shielding elements 8A and 8B is present. Third embodiment.

[0043] Next, with reference to Fig. 7 a description of a linear conveying system 1B according to a third embodiment is given. Fig. Figure 7 is a side view showing the linear conveying system 1B according to the third embodiment. In the present embodiment, the gap-specific magnetic shielding element 9 is configured differently than that of the first embodiment described above. The third embodiment overlaps with the first embodiment described above, and these overlapping parts have the same reference numerals and are not described further.

[0044] The gap-specific magnetic shielding element 9 is integrally formed with one of the adjacent magnetic shielding elements 8. The gap-specific magnetic shielding element 9 extends from an end of the magnetic shielding element 8A facing the other magnetic shielding element 8B towards the stator 3 and then extends towards the other magnetic shielding element 8B. The gap 10 is closed by the gap-specific magnetic shielding element 9 on a side that is closer to the stators 3. The gap-specific magnetic shielding element 9 is in contact with a surface of the other magnetic shielding element 8B facing the stator 3.

[0045] The gap-specific magnetic shielding element 9 can extend from the end of magnetic shielding element 8A facing the other magnetic shielding element 8B towards the position detection unit 7 and then extend towards the other magnetic shielding element 8B. In such a configuration, the gap 10 is closed by the gap-specific magnetic shielding element 9 on the side closer to the position detection units 7, and the gap-specific magnetic shielding element 9 is in contact with a surface of the other magnetic shielding element 8B facing the position detection unit 7. The gap-specific magnetic shielding element 9 can be formed on the other magnetic shielding element 8B.

[0046] Next, a description of the effects of the linear conveying system 1B according to the present embodiment will be given.

[0047] In the present embodiment, the gap-specific magnetic shielding element 9 is integrally formed with one of the adjacent magnetic shielding elements 8. This configuration allows for a reduced number of components and, as in the first embodiment described above, improved accuracy of the position detection of each runner 4 compared to the conventional configuration. Fourth embodiment.

[0048] Next, with reference to Fig. 8 a description of a linear conveying system 1C according to a fourth embodiment is given. Fig. Figure 8 is a side view showing the linear conveying system 1C according to the fourth embodiment. In the present embodiment, the gap-specific magnetic shielding element 9 is configured differently than that of the first embodiment described above. The fourth embodiment overlaps with the first embodiment described above, and these overlapping parts have the same reference numerals and are not described further.

[0049] The gap-specific magnetic shielding element 9 comprises a first shielding part 9a, which extends from one of the magnetic shielding elements 8 towards the other magnetic shielding element 8, and a second shielding part 9b, which is formed on the other magnetic shielding element 8 and is in contact with the first shielding part 9a. The first shielding part 9a extends from an end of the magnetic shielding element 8A facing the other magnetic shielding element 8B towards the magnetic shielding element 8B. In the present embodiment, the first shielding part 9a is a projecting part.

[0050] The second shielding part 9b is formed at an end of the magnetic shielding element 8B facing the magnetic shielding element 8A. In the present embodiment, the second shielding part 9b is a recessed portion into which the first shielding part 9a is inserted. The recessed portion is open towards the magnetic shielding element 8A. The recessed portion is also recessed in a direction away from the magnetic shielding element 8A. The recessed portion, which serves as the second shielding part 9b, is in contact with the protruding portion, which serves as the first shielding part 9a, at an inner surface. The gap 10 is closed by inserting the first shielding part 9a into the second shielding part 9b.

[0051] The first shielding part 9a can be the recessed part, while the second shielding part 9b is the protruding part which is inserted into the recessed part.

[0052] Next, a description of the effects of the linear conveying system 1C according to the present embodiment will be given.

[0053] In the present embodiment, the gap-specific magnetic shielding element 9 is integrally formed with both of the adjacent magnetic shielding elements 8. This configuration allows for a reduced number of components and, as in the first embodiment described above, improved accuracy of the position detection of each runner 4 compared to the conventional configuration.

[0054] In the present embodiment, the gap-specific magnetic shielding element 9 comprises the first shielding part 9a, which extends from one of the adjacent magnetic shielding elements 8 towards the other magnetic shielding element 8, and the second shielding part 9b, which is formed on the other magnetic shielding element 8 and is in contact with the first shielding part 9a. In particular, the first shielding part 9a is the projecting part that extends from the magnetic shielding element 8A towards the magnetic shielding element 8B. The second shielding part 9b is the recessed part formed on the magnetic shielding element 8B, and the projecting part, which serves as the first shielding part 9a, is inserted into the second shielding part 9b. This configuration can eliminate or reduce the gap 10 between the adjacent magnetic shielding elements 8A and 8B. Fifth embodiment.

[0055] Next, with reference to Fig. 9 a description of a linear conveying system 1D according to a fifth embodiment is given. Fig. Figure 9 is a side view showing the linear conveying system 1D according to the fifth embodiment. In the present embodiment, the gap-specific magnetic shielding element 9 is configured differently than that of the first embodiment described above. The fifth embodiment overlaps with the first embodiment described above, and these overlapping parts have the same reference numerals and are not described further.

[0056] The gap-specific magnetic shielding element 9 comprises a first shielding part 9a, which extends from one of the adjacent magnetic shielding elements 8 towards the other magnetic shielding element 8, and a second shielding part 9b, which is formed on the other magnetic shielding element 8 and is in contact with the first shielding part 9a. The first shielding part 9a extends from an end of the magnetic shielding element 8A facing the other magnetic shielding element 8B towards the magnetic shielding element 8B. In the present embodiment, the first shielding part 9a is a projecting part. The first shielding part 9a extends from a lower half of the end of the magnetic shielding element 8A facing the other magnetic shielding element 8B towards the magnetic shielding element 8B.

[0057] The second shielding part 9b is formed at an end of the magnetic shielding element 8B facing the magnetic shielding element 8A. In the present embodiment, the second shielding part 9b is a projecting part. The second shielding part 9b extends from an upper half of the end of the magnetic shielding element 8B facing the magnetic shielding element 8A in the direction of the magnetic shielding element 8A. The positions of the first and second shielding parts 9a and 9b are aligned in the first direction A. The first and second shielding parts 9a and 9b overlap each other in the second direction B. In other words, the first and second shielding elements 9a and 9b are arranged such that they overlap each other when viewed in the second direction B. The second shielding part 9b is in contact with a surface of the first shielding part 9a facing the stators 3.

[0058] In the present embodiment, the second shielding part 9b can be in contact with a surface of the first shielding part 9a facing the positioning detection units 7.

[0059] Next, a description of the effects of the linear conveying system 1D according to the present embodiment will be given.

[0060] In the present embodiment, the gap-specific magnetic shielding element 9 is integrally formed with both of the adjacent magnetic shielding elements 8. This configuration allows for a reduced number of components and, as in the first embodiment described above, improved accuracy of the position detection of each runner 4 compared to the conventional configuration.

[0061] In the present embodiment, the gap-specific magnetic shielding element 9 comprises the first shielding part 9a, which extends from one of the adjacent magnetic shielding elements 8 towards the other magnetic shielding element 8, and the second shielding part 9b, which is formed on the other magnetic shielding element 8 and is in contact with the first shielding part 9a. In particular, the first shielding part 9a is the projecting part that extends from the magnetic shielding element 8A towards the magnetic shielding element 8B. The second shielding part 9b is the projecting part that extends from the magnetic shielding element 8B towards the magnetic shielding element 8A and is arranged such that it overlaps the first shielding part 9a in the second direction B.This configuration can eliminate or reduce the gap 10 between the adjacent magnetic shielding elements 8A and 8B. Sixth embodiment.

[0062] Next, with reference to Fig. 10 a description of a linear conveying system 1E according to a sixth embodiment is given. Fig. Figure 10 is a side view showing the linear conveying system 1E according to the sixth embodiment. In the present embodiment, the gap-specific magnetic shielding element 9 is configured differently than that of the first embodiment described above. The sixth embodiment overlaps with the first embodiment described above, and these overlapping parts have the same reference numerals and are not described further.

[0063] The gap-specific magnetic shielding element 9 comprises a first shielding part 9a, which extends from one of the adjacent magnetic shielding elements 8 towards the other magnetic shielding element 8, and a second shielding part 9b, which is formed on the other magnetic shielding element 8 and is in contact with the first shielding part 9a.

[0064] The first shielding element 9a extends from one end of the magnetic shielding element 8A facing the other magnetic shielding element 8B towards the magnetic shielding element 8B. The further the first shielding element 9a extends from the magnetic shielding element 8A to the magnetic shielding element 8B, the closer the first shielding element 9a is curved to the stator 3. The first shielding element 9a comprises a first curved part 9c and a first contact part 9d. The first curved part 9c is a curved section formed between the first contact part 9d and the end of the magnetic shielding element 8A facing the other magnetic shielding element 8B. The further the first contact part 9d extends from the first curved part 9c to the magnetic shielding element 8B, the closer the first contact part 9d extends in a curved shape to the stator 3.The first contact part 9d is elastically deformable around the first bent part 9c in the first direction A.

[0065] The second shielding section 9b extends from an end of the magnetic shielding element 8B facing the magnetic shielding element 8A towards the magnetic shielding element 8A. The further the second shielding section 9b extends from the magnetic shielding element 8B towards the magnetic shielding element 8A, the closer the second shielding section 9b is curved to the stator 3. The first shielding section 9a and the second shielding section 9b have a symmetrical shape in the first direction A. The second shielding section 9b comprises a second curved section 9e and a second contact section 9f. The second curved section 9e is a curved part located between the second contact section 9f and the end of the magnetic shielding element 8B facing the magnetic shielding element 8A.The further the second contact part 9f extends from the second curved part 9e to the magnetic shielding element 8A, the closer the second contact part 9f extends to the stator 3 in a curved shape. The second contact part 9f is elastically deformable around the second curved part 9e in the first direction A.

[0066] When a front end of the first contact part 9d comes into contact with a front end of the second contact part 9f during the assembly of the magnetic shielding elements 8, which are integrally formed with the gap-specific magnetic shielding element 9, the first contact part 9d is elastically deformed in a direction away from the second contact part 9f about a boundary part between the first contact part 9d and the first bent part 9c and then pressed against the second contact part 9f under the effect of the elastic restoring force of the boundary part.If, on the other hand, the front end of the second contact part 9f comes into contact with the front end of the first contact part 9d during the assembly of the magnetic shielding elements 8, which are integrally formed with the gap-specific magnetic shielding element 9, the second contact part 9f is elastically deformed in a direction away from the first contact part 9d about a boundary section between the second contact part 9f and the second curved part 9e, and then pressed against the first contact part 9d under the influence of the elastic restoring force of the boundary section. The first and second shielding parts 9a and 9b press against each other in their contact relationship, thereby closing the gap 10.

[0067] The further the first shielding section 9a extends towards the magnetic shielding element 8B, the closer the first shielding section 9a can be curved to the position detection unit 7. The further the second shielding section 9b extends towards the magnetic shielding element 8A, the closer the second shielding section 9b can be curved to the position detection unit 7.

[0068] Next, a description of the effects of the linear conveying system 1E according to the present embodiment will be given.

[0069] In the present embodiment, the gap-specific magnetic shielding element 9 is integrally formed with both of the adjacent magnetic shielding elements 8. This configuration allows for a reduced number of components and, as in the first embodiment described above, improved accuracy of the position detection of each runner 4 compared to the conventional configuration.

[0070] In the present embodiment, the gap-specific magnetic shielding element 9 comprises the first shielding part 9a, which extends from one of the adjacent magnetic shielding elements 8 towards the other magnetic shielding element 8, and the second shielding part 9b, which is formed on the other magnetic shielding element 8 and is in contact with the first shielding part 9a. In particular, the first and second shielding parts 9a and 9b have an elastic restoring force that presses them into contact. This configuration can eliminate or reduce the gap 10 between the adjacent magnetic shielding elements 8A and 8B.

[0071] Because the first and second shielding parts 9a and 9b in the present embodiment possess the elastic restoring force, they also press into contact with each other. Even if the in Fig.Since the level difference 11 shown in Figure 6 exists between the adjacent magnetic shielding elements 8A and 8B, the first and second shielding parts 9a and 9b will therefore be in contact with each other in an elastic deformation suitable for the level difference 11. Accordingly, a magnetic gap between the first shielding part 9a and the second shielding part 9b can be eliminated. This prevents the magnetic flux generated by the rotor magnets 4c and the coils 3b from interfering with the position detection unit(s) 7, even when the level difference 11 occurs between the adjacent magnetic shielding elements 8A and 8B, and enables improved position detection accuracy for each rotor 4 compared to a conventional configuration. Reference symbol list 1, 1A, 1B, 1C, 1D, 1E linear conveyor system; 2. Route of transport; 3 Stator; 3a Stator core; 3b coil; 3c Core back; 3D tooth; 4 runners; 4a Housing; 4b Basis; 4c runner magnet; 4d, 6a magnetic field generation area; 5 Position detector; 6 position detection-specific magnets; 7 Position detection unit; 7a Substrate; 7b Magnetic sensor; 8, 8A, 8B Magnetic shielding element; 9 gap-specific magnetic shielding elements; 9a first shielding part; 9b second shielding part; 9c first curved part; 9d first contact part; 9e second curved part; 9f second contact part; 10 gap; 11 level difference; 12, 13 Border position; A first direction; B second direction; C third direction.

Claims

[1] Position detector (5), comprising: a position detection-specific magnet (6) which can be installed on a runner (4) for movement along a conveying path (2) comprising a stator (3); a position detection unit (7) that can be installed on the transport route (2) and which detects a magnetic field generated by the position detection-specific magnet (6); several magnetic shielding elements (8) which can be arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein a level difference (11) exists between the adjacent magnetic shielding elements (8A, 8B), which are offset in a second direction (B) which is orthogonal to the first direction (A), and the gap-specific magnetic shielding element (9) is bent along the level difference (11) and is in contact with the adjacent magnetic shielding elements (8A, 8B). [2] Position detector (5), comprising: a position detection-specific magnet (6) which can be installed on a runner (4) for movement along a conveying path (2) comprising a stator (3); a position detection unit (7) that can be installed on the transport route (2) and which detects a magnetic field generated by the position detection-specific magnet (6); several magnetic shielding elements (8) which can be arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the position detection-specific magnet (6) is designed to be arranged away from the stator (3) in a second direction (B), which is a direction orthogonal to the first direction (A), the position detection unit (7) is designed to be arranged in the second direction (B) between the stator (3) and the position detection-specific magnet (6), and the magnetic shielding elements (8) are designed to be arranged in the second direction (B) between the stator (3) and the position detection unit (7). [3] Position detector (5), comprising: a position detection-specific magnet (6) which can be installed on a runner (4) for movement along a conveying path (2) comprising a stator (3); a position detection unit (7) that can be installed on the transport route (2) and which detects a magnetic field generated by the position detection-specific magnet (6); several magnetic shielding elements (8) which can be arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the magnetic shielding elements (8) are configured to be arranged between the rotor magnet (4c) and the position detection unit (7) located away from the rotor magnet (4c) in a second direction (B), wherein the magnetic shielding elements (8) are configured to be arranged between the stator (3) and the position detection unit (7) located away from the stator (3) in a second direction (B), wherein the second direction (B) is a direction orthogonal to the first direction (A), and the magnetic shielding elements (8), the rotor magnet (4c), the stator (3) and the position detection unit (7) can be arranged such that a condition is met that a distance (D1) between the magnetic shielding elements (8) and the rotor magnet (4c) along the second direction (B) is shorter than a distance (D3) between the magnetic shielding elements (8) and the position detection unit (7) along the second direction (B), and / or a condition is met that a distance (D2) between the magnetic shielding elements (8) and the stator (3) along the second direction (B) is shorter than the distance (D3) between the magnetic shielding elements (8) and the position detection unit (7) along the second direction (B). [4] Position detector (5), comprising: a position detection-specific magnet (6) which can be installed on a runner (4) for movement along a conveying path (2) comprising a stator (3); a position detection unit (7) that can be installed on the transport route (2) and which detects a magnetic field generated by the position detection-specific magnet (6); several magnetic shielding elements (8) which can be arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the gap-specific magnetic shielding element (9) is integrally formed with at least one of the adjacent magnetic shielding elements (8A, 8B). [5] Position detector (5), comprising: a position detection-specific magnet (6) which can be installed on a runner (4) for movement along a conveying path (2) comprising a stator (3); a position detection unit (7) that can be installed on the transport route (2) and which detects a magnetic field generated by the position detection-specific magnet (6); several magnetic shielding elements (8) which can be arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the gap-specific magnetic shielding element (9) comprises: a first shielding element (9a) which extends from one of the adjacent magnetic shielding elements (8A, 8B) towards the other magnetic shielding element (8A, 8B), and a second shielding part (9b) which is formed on the other magnetic shielding element (8A, 8B), wherein the second shielding part (9b) is in contact with the first shielding part (9a). [6] Linear conveying system (1A), comprising: a transport path (2) with a stator (3); a runner (4) for moving along the conveying path (2), wherein the runner (4) forms a linear servomotor with the stator (3); a position detection-specific magnet (6) installed on the runner (4); a position detection unit (7) installed on the transport route (2), which detects a magnetic field generated by the position detection-specific magnet (6); Several magnetic shielding elements (8) are arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the several magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein a level difference (11) exists between the adjacent magnetic shielding elements (8A, 8B), which are offset in a second direction (B) which is orthogonal to the first direction (A), and the gap-specific magnetic shielding element (9) is bent along the level difference (11) and is in contact with the adjacent magnetic shielding elements (8A, 8B). [7] Linear conveying system (1), comprising: a transport path (2) with a stator (3); a runner (4) for moving along the conveying path (2), wherein the runner (4) forms a linear servomotor with the stator (3); a position detection-specific magnet (6) installed on the runner (4); a position detection unit (7) installed on the transport route (2), which detects a magnetic field generated by the position detection-specific magnet (6); Several magnetic shielding elements (8) are arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the several magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the position detection-specific magnet (6) is arranged away from the stator (3) in a second direction (B), which is orthogonal to the first direction (A), the position detection unit (7) is arranged in the second direction (B) between the stator (3) and the position detection-specific magnet (6), and the magnetic shielding elements (8) are arranged in the second direction (B) between the stator (3) and the position detection unit (7). [8] Linear conveying system (1), comprising: a transport path (2) with a stator (3); a runner (4) for moving along the conveying path (2), wherein the runner (4) forms a linear servomotor with the stator (3); a position detection-specific magnet (6) installed on the runner (4); a position detection unit (7) installed on the transport route (2), which detects a magnetic field generated by the position detection-specific magnet (6); Several magnetic shielding elements (8) are arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the several magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the position detection unit (7) is arranged away from the rotor magnet (4c) in a second direction (B), which is a direction orthogonal to the first direction (A), the position detection unit (7) is arranged away from the stator (3) in the second direction (B), the magnetic shielding elements (8) are arranged in a second direction (B) between the rotor magnet (4c) and the position detection unit (7) and are arranged in the second direction (B) between the stator (3) and the position detection unit (7), and the magnetic shielding elements (8), the rotor magnet (4c), the stator (3) and the position detection unit (7) are arranged such that a condition is met that a distance (D1) between the magnetic shielding elements (8) and the rotor magnet (4c) along the second direction (B) is shorter than a distance (D3) between the magnetic shielding elements (8) and the position detection unit (7) along the second direction (B), and / or a condition is met that a distance (D2) between the magnetic shielding elements (8) and the stator (3) along the second direction (B) is shorter than the distance (D3) between the magnetic shielding elements (8) and the position detection unit (7) along the second direction (B). [9] Linear conveying system (1), comprising: a transport path (2) with a stator (3); a runner (4) for moving along the conveying path (2), wherein the runner (4) forms a linear servomotor with the stator (3); a position detection-specific magnet (6) installed on the runner (4); a position detection unit (7) installed on the transport route (2), which detects a magnetic field generated by the position detection-specific magnet (6); Several magnetic shielding elements (8) are arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the several magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein a magnetic field generating surface (4d) of the rotor magnet (4c) and a magnetic field generating surface (6a) of the position detection specific magnet (6) are orthogonal to each other. [10] Linear conveying system (1B), comprising: a transport path (2) with a stator (3); a runner (4) for moving along the conveying path (2), wherein the runner (4) forms a linear servomotor with the stator (3); a position detection-specific magnet (6) installed on the runner (4); a position detection unit (7) installed on the transport route (2), which detects a magnetic field generated by the position detection-specific magnet (6); Several magnetic shielding elements (8) are arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the several magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the gap-specific magnetic shielding element (9) is integrally formed with at least one of the adjacent magnetic shielding elements (8A, 8B). [11] Linear conveying system (1C; 1D; 1E), comprising: a transport path (2) with a stator (3); a runner (4) for moving along the conveying path (2), wherein the runner (4) forms a linear servomotor with the stator (3); a position detection-specific magnet (6) installed on the runner (4); a position detection unit (7) installed on the transport route (2), which detects a magnetic field generated by the position detection-specific magnet (6); Several magnetic shielding elements (8) are arranged and installed with a gap (10) in a first direction (A), which is a direction of movement of the runner (4) along the conveying path (2), wherein the several magnetic shielding elements (8) are configured to provide shielding against a magnetic flux which extends from a runner magnet (4c) of the runner (4) and coils (3b) of the stator (3) to the position detection unit (7); and a gap-specific magnetic shielding element (9) which closes the gap (10) between adjacent magnetic shielding elements (8A, 8B) of the magnetic shielding elements (8), wherein the gap-specific magnetic shielding element (9) is configured to provide shielding against the magnetic flux, wherein the gap-specific magnetic shielding element (9) comprises: a first shielding element (9a) which extends from one of the adjacent magnetic shielding elements (8A, 8B) towards the other magnetic shielding element (8A, 8B), and a second shielding part (9b) which is formed on the other magnetic shielding element (8A, 8B), wherein the second shielding part (9b) is in contact with the first shielding part (9a).

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