Automated sample injection system and gas chromatography analysis system

Abstract

The sample feeder (6A; 6B) includes an injection device (14A; 14B) and a circular turntable (12A; 12B) provided on the front of the injection device (14A; 14B). The sample collector (8) includes a bottle holder (18) and a transfer arm (20). The sample feeder (6A; 6B) has an accessible configuration that, when two sample feeders (6A; 6B) are arranged with the backs of the injection devices (14A; 14B) of the sample feeders (6A; 6B) facing each other, ensures a movement path of the transfer arm (20) for allowing the transfer arm (20) of one sample collector (8) arranged laterally to the two sample feeders (6A; 6B) to access the circular turntable (12A; 12B) of each of the two sample feeders (6A; 6B), irrespective of the size of the circular turntable (12A; 12B).

Description

TECHNICAL FIELD

[0001] The present application relates to an automatic sample injection system for gas chromatographic analysis and a gas chromatographic analysis system. BACKGROUND

[0002] An automatic sample injection device (hereinafter, referred to as a sampler) that automatically injects a sample into an analysis device for performing gas chromatographic analysis is known (see Patent Literature 1). The sampler includes a movable turntable on which a plurality of bottles that store samples are disposed, and a syringe for sucking a sample from a bottle disposed on the turntable. At the time of injection of a sample into a gas chromatograph, the turntable is moved so that a bottle that stores a target sample is disposed at a predetermined position, and the sample of the bottle disposed at the predetermined position is sucked by the syringe and injected into the analysis device.

[0003] Further, in order to be able to efficiently perform gas chromatographic analysis of a large number of samples, an analysis device provided with two gas chromatograph sections is sometimes constructed. In this case, two samplers are used in order to inject a sample into each gas chromatograph section.

[0004] Further, the number of bottles that can be disposed on the turntable of the sampler is limited, and in the case where the number of samples is large, it is not possible to dispose all of the samples on the sampler. Therefore, a sampler that supplies bottles that store samples to the sampler is sometimes used together with the sampler. The sampler includes a bottle platform on which a plurality of bottles are arranged, and a transport arm that transports a bottle arranged on the bottle platform to the turntable of the sampler. In addition, in the case where the sampler is used, in addition to the bottle that stores a sample (a sample bottle) on the turntable of the sampler, a cleaning bottle for cleaning the syringe, a waste bottle is often disposed.

[0005] Prior art documents

[0006] Patent documents

[0007] Patent Literature 1: Japanese Patent Application Laid-Open No. 9-325153 SUMMARY

[0008] Problems to be solved by the invention

[0009] The analysis device of the gas chromatograph generally has an injection port for injecting a sample on the upper surface of the housing, and the sampler is mounted on the housing of the analysis device so that the syringe is positioned above the injection port. In the case where two samplers are used together, if the configuration is such that the syringes of the respective samplers are separated far apart, it is necessary to provide the injection ports of the respective gas chromatograph sections at positions separated far apart, and the analysis device itself is large-sized, and the setting area of the entire analysis system increases. Therefore, in the case where two samplers are used together, it is desirable to configure the syringes of the respective samplers close to each other.

[0010] In addition, there is a demand to arrange a large number of bottles on the turntable of the sample feeder. There are a linear type of turntable in which bottles are arranged in a straight line and a circular type of turntable in which bottles are arranged on the same circumference. The linear type of turntable has an advantage that the transport arm of the sampler easily approaches the turntable of each sample feeder even when two sample feeders and samplers are used together, but needs to be elongated in order to increase the number of bottles that can be arranged, and the arrangement space of the sample feeder becomes large.

[0011] On the other hand, the circular type of turntable has an advantage that a large number of bottles can be arranged in a short width dimension compared to the linear type of turntable, but when two sample feeders are used together, the turntables easily interfere with each other, and the size of the turntable is limited. If two sample feeders are arranged in a manner that the turntables do not interfere with each other, the size of the turntable is not limited, but there is a problem that when used together with a sampler, the housing of the sample feeder and the like interfere with the transport arm of the sampler, and the transport arm is difficult to approach the turntable of each sample feeder.

[0012] The present application was made in view of the above problems, and aims to suppress an increase in the arrangement area of the entire analysis system when two sample feeders and a sampler are used together to configure an analysis system.

[0013] Solution to the problem

[0014] The automatic sample injection system of the present application is an automatic sample injection system for gas chromatography analysis composed of at least one sample feeder among a plurality of sample feeders and a sampler that supplies bottles that store samples to the sample feeder. In the automatic sample injection system, the sample feeder includes an injection device having a front surface and a back surface configured to extract a sample from a bottle arranged at a predetermined position on the front surface side and inject the sample into an injection port of a gas chromatography analysis device, and a circular turntable provided on the front surface of the injection device and having a plurality of bottle openings for arranging bottles on the same circumference in a horizontal plane, configured to be rotatable to arrange any bottle arranged at the bottle opening at the predetermined position on the circumference, and the sampler includes a bottle holder for arranging a plurality of bottles in a plane, and a transport arm having a clamp for holding the bottle at a tip end portion, configured to transport a bottle between the circular turntable of the sample feeder and the bottle holder by moving the clamp inside and outside the area where the bottle holder is arranged. Further, the sample feeder has an approachable configuration that ensures a movement path of the transport arm of one sampler arranged side by side with two sample feeders in a manner that the back surfaces of the injection devices of the two sample feeders face each other, regardless of the size of the circular turntable, to allow the transport arm of the one sampler to approach the circular turntable of each of the two sample feeders.

[0015] The gas chromatography analysis system of the present application includes: an analysis device having a first gas chromatography section and a second gas chromatography section for performing gas chromatography analysis in a common housing; and an automatic sample injection system provided on the housing of the analysis device, having two injectors for injecting a sample into the first gas chromatography section and the second gas chromatography section, respectively, and a sampler for supplying a bottle in which a sample is stored to the two injectors. The automatic sample injection system is the automatic sample injection system of the present application in which the two injectors each have an injection device and a circular turntable, and the sampler has a bottle holder and a transport arm, and the two injectors of the automatic sample injection system are arranged with the backs of the injection devices facing each other.

[0016] Effects of the invention

[0017] According to the automatic sample injection system of the present application, the injectors have an accessible configuration in which, when the two injectors are arranged with the backs of the injection devices facing each other, a moving path of the transport arm of the sampler arranged beside the two injectors is ensured regardless of the size of the circular turntable, and thus the two injectors can be arranged with the backs of the injection devices facing each other even when the two injectors and the sampler are used together. When the two injectors are arranged with the backs of the injection devices facing each other, the circular turntables of the respective injectors do not interfere with each other, and thus the injection devices of the respective injectors can be brought close to each other, and as a result, the two injection ports of the analysis device can be arranged close to each other. As a result, the increase in the installation area of the gas chromatography analysis system can be suppressed.

[0018] According to the gas chromatography analysis system of the present application, the two injectors of the automatic sample injection system are arranged with the backs of the injection devices facing each other, and thus the injection devices of the respective injectors can be brought close to each other, and as a result, the two injection ports of the analysis device can be arranged close to each other. As a result, the increase in the installation area of the gas chromatography analysis system can be suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a front view showing an embodiment of a gas chromatography analysis system.

[0020] Figure 2 is a plan view of the automatic sample injection system of the embodiment as viewed from above.

[0021] Figure 3 is a conceptual view for explaining the positional relationship between the two injectors and the sampler.

[0022] Figure 4is a view obtained from above when the transfer arm of the automatic sample injection system approaches the circular turntable of the sampler.

[0023] Figure 5 is a conceptual view for explaining the position of the claw of the gripper when the transfer arm hands over the bottle to the turntable of the sampler. DETAILED DESCRIPTION

[0024] Hereinafter, an embodiment of an automatic sample injection system and a gas chromatography system provided with the automatic sample injection system of the present application will be described with reference to the drawings.

[0025] Figure 1 is a front view showing an embodiment of a gas chromatography system, Figure 2 is a plan view obtained from above when the automatic sample injection system provided in the gas chromatography system is observed.

[0026] The gas chromatography system includes an analysis device 2 and an automatic sample injection system 4 including two samplers 6A, 6B and a sample handler 8. The automatic sample injection system 4 is arranged on the housing of the analysis device 2. In Figure 1 , only the sampler 6A arranged on the front side among the two samplers 6A, 6B is illustrated.

[0027] The analysis device 2 has two gas chromatography sections 10A, 10B (1st gas chromatography section and 2nd gas chromatography section) for independently performing gas chromatography analysis in the inside of the housing. In Figure 1 , only the gas chromatography section 10A on the front side among the two gas chromatography sections 10A, 10B is illustrated. Further, although illustration is omitted, the gas chromatography sections 10A, 10B each include a sample gasification chamber for gasifying a sample to generate a sample gas, a separation column for separating components in the sample gas generated in the sample gasification chamber, and a detector for detecting the components separated in the separation column. An injection port for injecting a sample to the sample gasification chamber of each gas chromatography section 10A, 10B is provided on the upper surface of the housing of the analysis device 2.

[0028] The sampler 6A of the automatic sample injection system 4 includes a circular turntable 12A having a plurality of bottle ports 16 for setting bottles V on the same circumference and an injection device 14A for extracting a sample from the bottle V arranged at a predetermined position by means of a syringe 15A and injecting the sample to the injection port of the gas chromatography section 10A. The sampler 6B has the same structure as the sampler 6A, including a circular turntable 12B and an injection device 14B.

[0029] As Figure 2As shown, the injection devices 14A, 14B of the respective sample feeders 6A, 6B have a front surface and a back surface. The circular turntables 12A, 12B are provided on the front surfaces of the injection devices 14A, 14B, respectively. The circular turntables 12A, 12B are configured to position any of the bottles V provided at the bottle ports 16 at predetermined positions for sample suction by the syringes 15A, 15B by rotation.

[0030] The sample feeders 6A, 6B are arranged so that the front surface of the injection device 14A (the side on which the circular turntable 12A is provided when viewed from the injection device 14A) and the front surface of the injection device 14B (the side on which the circular turntable 12B is provided when viewed from the injection device 14B) face opposite directions, and the back surfaces (the surfaces on the side opposite to the front surfaces) of the injection devices 14A, 14B face each other. With this arrangement of the sample feeders 6A, 6B, the circular turntables 12A, 12B do not interfere with each other, and thus the injection devices 14A, 14B are arranged close to each other.

[0031] The sampler 8 is provided laterally to the sample feeders 6A, 6B to supply the bottles V in which samples are placed to the respective circular turntables 12A, 12B of the sample feeders 6A, 6B. The sampler 8 includes a bottle holder 18 and a transport arm 20. The bottle holder 18 is a circular platform on which a plurality of bottle ports 22 for providing the bottles V are arranged in the same plane, and a plurality of bottles V are arranged in a plane. The transport arm 20 is provided on the bottle holder 18 so as to extend in the horizontal direction, and has a gripper 24 for holding the bottles V at a top end portion. The transport arm 20 is configured to position the gripper 24 at any of the bottle ports 22 of the bottle holder 18 and at a predetermined handover position provided outside the bottle holder 18 by rotation in the horizontal plane with the center of the bottle holder 18 as the center of rotation and by sliding in the axial direction.

[0032] The gripper 24 has a plurality of claws 26 extending downward to hold the outer circumferential surface of the bottle V from above. The claws 26 of the gripper 24 are provided at four equal positions on the same circumference to equally hold the outer circumferential surface of the bottle V. Hereinafter, the center of the circumference on which the claws 26 are arranged is defined as the center of the gripper 24. The gripper 24 holds and releases the outer circumferential surface of the bottle V by point-symmetrical movement of the claws 26 with the center of the gripper 24 as the axis, and the bottle V is lifted from the bottle port or set to the bottle port by upward and downward movement of the transport arm 20 or upward and downward movement of the claws 26.

[0033] As Figure 3As shown, in this embodiment, the injectors 6A, 6B and the sampler 8 are arranged such that the center of the bottle holder 18 (i.e., the rotation center of the delivery arm 20) is located on the perpendicular bisecting line of the line segment connecting the center of the circular turntable 12A and the center of the circular turntable 12B. This arrangement minimizes the installation area of ​​the automated sample injection system 4 comprised of the injectors 6A, 6B and the sampler 8. Furthermore, the arrangement of the injectors 6A, 6B and the sampler 8 is not limited to this, but to reduce the installation area of ​​the automated sample injection system 4, it is preferable that the center of the bottle holder 18 is close to the perpendicular bisecting line of the line segment connecting the center of the circular turntable 12A and the center of the circular turntable 12B. In this arrangement where the injectors 6A and 6B face opposite sides, when the sampler 8 exchanges bottles V with the injectors 6A and 6B respectively, the delivery arm 20 approaches the circular turntables 12A and 12B from the oblique rear direction of the injection devices 14A and 14B.

[0034] like Figure 4 As shown, the injectors 6A and 6B have an accessible structure that allows the delivery arm 20 to approach the circular turntables 12A and 12B from the side of the back of the injection devices 14A and 14B. Specifically, the delivery arm 20 has a housing shape such that when the clamp 24 moves toward the bottle neck 16 of the circular turntables 12A and 12B, which are arranged on straight lines L1 and L2 connecting the rotation center of the delivery arm 20 and the centers of the circular turntables 12A and 12B respectively, the injection devices 14A and 14B do not interfere with the delivery arm, regardless of the size of the outer diameter of the circular turntables 12A and 12B. The configuration of the constituent elements of the injection devices 14A and 14B is designed to achieve such a housing shape. In the figure, the housings of each injection device 14A, 14B are provided with notches to achieve an accessibility structure, but the accessibility structure can also be achieved by other structures such as providing recesses in the housings of the injection devices 14A, 14B to ensure a path for the clamp 24 to move toward the center of the circular turntables 12A, 12B.

[0035] The injectors 6A and 6B have the aforementioned accessible structure, so that the respective junction positions of the delivery arm 20 and the circular turntables 12A and 12B can be set at positions P1 and P2 on the straight lines L1 and L2 connecting the rotation center of the delivery arm 20 and the respective centers of the circular turntables 12A and 12B.

[0036] In this embodiment, each claw 26 of the clamp 24 is located at the four corners of a quadrilateral having two sides parallel to the axial direction of the conveying arm 20. That is, there are no claws 26 on a horizontal straight line orthogonal to the axial direction of the conveying arm 20 and passing through the center of the clamp 24. Therefore, if the bottle V is exchanged on straight lines L1 and L2, then as Figure 5As shown, the claw 26 does not come between the bottle mouth 16 of the subject and the adjacent bottle mouth 16 when the gripper 24 is positioned on the bottle mouth 16 of the circular turntable 12A, 12B. Therefore, even in the case where the bottle V is provided at the adjacent bottle mouth 16, the adjacent bottle V does not interfere with the claw 26. That is, even if the interval between the bottle mouths 16 of the circular turntable 12A, 12B is narrowed, the transfer arm 20 can be caused to perform the handover of the bottle V between the circular turntables 12, 12B without interference from the bottle V provided at the adjacent bottle mouth 16. Thus, the number of bottles V that can be provided at the circular turntable 12A, 12B can be increased as much as possible, and as a result, the outer diameter of the circular turntable 12A, 12B can be reduced.

[0037] Further, the samplers 6A, 6B each have a configuration that is left-right symmetrical when viewed from the front side of the injection device 14A, 14B. Therefore, even if the sampler 8 is arranged at a position opposite to that of the above-described embodiment (a position on the left side of the samplers 6A, 6B in the drawing), the transfer arm 20 of the sampler 8 can likewise approach each circular turntable 12A, 12B. This means that the arrangement of the samplers 6A, 6B, the sampler 8 can be changed in correspondence with the design of the analysis device 2. Figure 2

[0038] In addition, the above-described embodiment assumes that two samplers and one sampler are used together, and is not intended to mean that two samplers and one sampler are essential components of the automatic sample injection system of the present application. The implementation form of the automatic sample injection system also includes a form in which only one sampler is provided, a form in which one sampler and one sampler are provided, and a form in which two samplers are provided. For example, in the case where the automatic sample injection system is constructed by two samplers and one sampler as in the above-described embodiment, the samplers and / or the sampler can be removed to provide a structure in which only one sampler is provided, a structure in which one sampler and one sampler are provided, or a structure in which two samplers are provided.

[0039] In the case where the automatic sample injection system is constructed by two samplers, the two samplers can be arranged so that the back surfaces of the injection devices face each other, and thus the circular turntables can be prevented from interfering with each other regardless of the size of the circular turntables. Further, in the case where the automatic sample injection system is constructed by only one sampler, the sampler has the above-described approachable configuration, and thus when the sampler and / or the sampler are added as needed, the Figure 2 As shown in the above-described arrangement, a compact system construction can be achieved.

[0040] The implementation form of the automatic sample injection system of the present application and the implementation form of the gas chromatograph analysis system are as follows.

[0041] ​An embodiment of the automatic sample injection system of the present application is an automatic sample injection system for gas chromatography analysis, which is composed of a plurality of sample injectors and at least one of the sample injectors among a sampler that supplies bottles that receive samples to the sample injectors. In the automatic sample injection system, the sample injectors include: an injection device that has a front surface and a back surface, and is configured to extract a sample from a bottle arranged at a predetermined position on the front surface side and inject the sample into an injection port of a gas chromatography analysis device; and a circular turntable that is provided on the front surface of the injection device, has a plurality of bottle openings for arranging bottles on the same circumference in a horizontal plane, and is configured to be rotatable to arrange any bottle arranged at the bottle openings at the predetermined position on the circumference. The sampler includes: a bottle holder that arranges a plurality of bottles in a plane; and a transport arm that has a gripper for holding the bottle at a tip end portion, and transports a bottle between the circular turntable of the sample injector and the bottle holder by causing the gripper to act inside and outside of an area where the bottle holder is arranged. The sample injector has an accessible configuration that ensures a movement path of the transport arm of one of the samplers arranged side by side with the two sample injectors arranged so that the back surfaces of the injection devices of the sample injectors face each other, regardless of the size of the circular turntables.

[0042] In the first aspect of the above embodiment, the transport arm of the sampler is configured to rotate in a horizontal plane and move the gripper in a radial direction of a circle having a center at the rotation center thereof, and the accessible configuration is a configuration that ensures a path for the transport arm to move the gripper to a position on the bottle opening of the circular turntable arranged on a straight line connecting the rotation center and the center of the circular turntable, regardless of the size of the circular turntables, when the two sample injectors are arranged so that the back surfaces thereof face each other and the sampler is arranged so that the rotation center of the transport arm is located on or near a perpendicular bisector of the straight line connecting the centers of the circular turntables of the two sample injectors. According to this aspect, the handoff position of the transport arm and the bottle of the circular turntable can be set to a position on the straight line connecting the rotation center of the transport arm and the center of the circular turntable. In this way, the handoff of the bottle can be performed at a position closest to the rotation center of the transport arm, and the transport efficiency of the bottle is improved.

[0043] In the first aspect described above, the sample injector can be configured to cause the circular turntable to act so that the bottle opening used for the handoff is located at a handoff position set at a position on a straight line connecting the rotation center of the transport arm and the center of the circular turntable when the handoff of the bottle is performed between the transport arm and the sample injector, and the sampler can be configured to cause the transport arm to act so that the gripper is located at the handoff position when the handoff of the bottle is performed between the sample injector and the sampler.

[0044] In the above case, it is preferable that the gripper has a plurality of claws that are moved in a planar point symmetry with the center of the gripper as an axis in order to hold the outer peripheral surface of the bottle, and the plurality of claws are arranged at different positions on a straight line that is orthogonal to the axis of the transport arm and passes through the center of the gripper. In this way, when the gripper is positioned on the bottle mouth of the circular turntable, the claws are not positioned between the bottle mouth of the object and the adjacent bottle mouth, and even when a bottle is provided in the adjacent bottle mouth, the bottle provided in the adjacent bottle mouth does not interfere with the claws. That is, even if the interval between the bottle mouths of the circular turntable is narrowed, the gripper of the transport arm can be caused to perform the handover of the bottle between the circular turntable without interference from the bottle provided in the adjacent bottle mouth. Thus, the number of bottles that can be provided in the circular turntable can be increased as much as possible, and as a result, the outer diameter of the circular turntable can be reduced.

[0045] In the second aspect of the above embodiment, the sample injector has a configuration that is left-right symmetrical when viewed from the front side of the injection device. According to this aspect, the arrangement of the sample injector and the sample collector can be changed in correspondence with the design of the gas chromatograph.

[0046] An embodiment of the gas chromatograph system of the present application includes an analysis device having a first gas chromatograph section and a second gas chromatograph section for performing gas chromatographic analysis in a common housing, and an automatic sample injection system provided on the housing of the analysis device, having two sample injectors for injecting a sample into the first gas chromatograph section and the second gas chromatograph section, respectively, and a sample collector for supplying a bottle in which a sample is stored to the two sample injectors, the automatic sample injection system being the above-described automatic sample injection system in which the two sample injectors each have an injection device and a circular turntable, and the sample collector has a bottle holder and a transport arm, the two sample injectors of the automatic sample injection system being arranged in such a manner that the back surfaces of the injection devices face each other.

[0047] In the above embodiment, the transport arm of the sample collector of the automatic sample injection system can be configured to have a gripper for holding a bottle at a tip end portion, to rotate in a horizontal plane, and to move the gripper in the radial direction of a circle having the center of rotation as the center. In this case, the sample collector can be arranged in such a manner that the center of rotation of the transport arm is located on or near a perpendicular bisector of a straight line connecting the centers of the circular turntables of the two sample injectors. According to this arrangement, the area in which the automatic sample injection system is provided can be reduced.

[0048] Explanation of reference signs

[0049] 2, analysis device; 4, automatic sample injection system; 6A, 6B, sample injector; 8, sampler; 10A, 10B, gas chromatograph section; 12A, 12B, circular turntable; 14A, 14B, injection device; 15A, 15B, syringe; 16, bottle mouth; 18, 22, bottle holder; 20, transfer arm; 24, clamp; 26, claw.

Claims

1. An automatic sample injection system for gas chromatography analysis, which is an automatic sample injection system for gas chromatography analysis constituted by two injectors and a sampler that supplies bottles that hold samples to the two injectors respectively, wherein the two injectors each include: an injection device that has a front surface and a back surface and is configured to extract a sample from a bottle arranged at a predetermined position on the front surface side and inject the sample into an injection port of a gas chromatography analysis device; and a circular turntable that is provided on the front surface side of the injection device, has a plurality of bottle openings for arranging bottles on the same circumference in a horizontal plane, and is configured to be rotatable so as to be able to arrange any bottle arranged at the bottle openings at the predetermined position on the circumference, the sampler includes: a bottle holder that arranges a plurality of bottles in a plane; and a transport arm that has a gripper for holding the bottles at a tip end portion and transports bottles between the circular turntable of the injector and the bottle holder by causing the gripper to act within and outside of an area where the bottle holder is provided, the two injectors are arranged in such a manner that the back surfaces of the injection devices of the two injectors face each other, and the sampler is arranged to the side of the two injectors, the two injectors each have an accessible configuration that ensures a movement path of the transport arm of the sampler for allowing the transport arm to access the circular turntable of each of the two injectors without interfering with the injection device of the two injectors.

2. The automatic sample injection system according to claim 1, wherein the transport arm of the sampler is configured to rotate in a horizontal plane and move the gripper in a radial direction of a circle having a center of rotation as a center, and the transport arm moves the gripper along a straight line that connects the center of rotation and the center of the circular turntable when transporting the bottle between the circular turntable and the bottle holder.

3. The automatic sample injection system according to claim 1, wherein the injector has a configuration that is symmetrical left and right when viewed from the front surface side of the injection device.

4. An automatic sample injection system for gas chromatography analysis, which is an automatic sample injection system for gas chromatography analysis constituted by at least one injector and a sampler that supplies bottles that hold samples to the injector, wherein the injector includes: an injection device that has a front surface and a back surface and is configured to extract a sample from a bottle arranged at a predetermined position on the front surface side and inject the sample into an injection port of a gas chromatography analysis device; and a circular turntable that is provided on the front surface of the injection device, has a plurality of bottle openings for arranging bottles on the same circumference in a horizontal plane, and is configured to be rotatable so as to be able to arrange any bottle arranged at the bottle openings at the predetermined position on the circumference, the sampler includes: a bottle holder that arranges a plurality of bottles in a plane; and a transport arm that has a gripper for holding the bottles at a tip end portion and transports bottles between the circular turntable of the injector and the bottle holder by causing the gripper to act within and outside of an area where the bottle holder is provided. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The accessable configuration is a configuration that, when the two sample injectors are arranged with the back surfaces of the injection devices facing each other and the sampler is arranged with the rotation center of the transport arm located on or near a perpendicular bisector of a straight line connecting the centers of the turntables of the two sample injectors, ensures a movement path of the transport arm for moving the gripper toward a position on the vial port of the turntable arranged on the straight line connecting the rotation center of the transport arm and the center of the turntable, regardless of the size of the turntable. The transport arm of the sampler is configured to rotate in a horizontal plane and move the gripper in the radial direction of a circle with the rotation center as the center. The accessable configuration is a configuration that, when the two sample injectors are arranged with the back surfaces of the injection devices facing each other and the sampler is arranged with the rotation center of the transport arm located on or near a perpendicular bisector of a straight line connecting the centers of the turntables of the two sample injectors, ensures a movement path of the transport arm for moving the gripper toward a position on the vial port of the turntable arranged on the straight line connecting the rotation center of the transport arm and the center of the turntable, regardless of the size of the turntable.

5. The automatic sample injection system according to claim 4, wherein The sample injector is configured to cause the turntable to move so that the vial port used for the handover is located at a handover position set at a position on a straight line connecting the rotation center of the transport arm and the center of the turntable, when the handover of the vial is performed between the transport arm and the sample injector. The sampler is configured to cause the transport arm to move so that the gripper is located at the handover position, when the handover of the vial is performed between the sample injector and the sampler.

6. The automatic sample injection system according to claim 5, wherein The gripper has a plurality of claws that move in a plane point-symmetrically with the center of the gripper as an axis in order to hold the outer circumferential surface of the vial, and the plurality of claws are arranged at different positions on a horizontal straight line that is orthogonal to the axis of the transport arm and passes through the center of the gripper.

7. The automatic sample injection system according to claim 4, wherein The sample injector has a configuration that is bilaterally symmetrical when viewed from the front side of the injection device.

8. A gas chromatograph system, wherein The gas chromatograph system includes: an analysis device having a first gas chromatograph section and a second gas chromatograph section for performing gas chromatographic analysis in a common housing; and an automatic sample injection system provided on the housing of the analysis device, having two sample injectors for injecting a sample into the first gas chromatograph section and the second gas chromatograph section, respectively, and a sampler for supplying a vial in which a sample is stored to the two sample injectors, The automatic sample injection system is the automatic sample injection system according to claim 1, in which the two sample injectors each have an injection device and a turntable, and the sampler has a vial holder and a transport arm, The two sample injectors of the automatic sample injection system are arranged with the back surfaces of the injection devices facing each other.

9. The gas chromatograph system according to claim 8, wherein The transport arm of the sampler of the automatic sample injection system is configured to have a jig for holding a bottle at a tip end portion, rotate in a horizontal plane, and move the jig in a radial direction of a circle with a rotation center thereof as a center, The sampler is configured in such a manner that the rotation center of the transport arm is located on or near a perpendicular bisector of a straight line connecting the centers of the circular turntables of the two injectors to each other.

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