JPH0321487Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an automatic sample injection device using a syringe.

(b) Prior art Robotic devices are used in many industrial fields from the viewpoint of labor saving, and have also been introduced in the field of automatic sample injection technology.

This type of conventional device will be explained with reference to FIG.

In the same figure, reference numeral 21 is a movable stand configured in an inverted L shape, and this movable stand is used for the robot hand 2.
The robot hands 22 and 23 are supported by robot hands 22 and 23, which receive control signals from a control device (not shown) and can be freely moved forward, backward, left, right, and up and down by a drive mechanism (not shown). A syringe fixing board 24 is fixed to the movable frame 21, and a syringe 25 including a needle 30 is fixed to the syringe fixing board 24. A plunger 26 is vertically movable, and a plunger head 27 is fixed to the upper end of the plunger. 28 is easily fixed to the upper surface of the plunger head 27. 30 is a motor, an inverted L-shaped moving frame 2
A pinion 29 is pivotally attached to the motor 30, and the pinion 29 and the rack 28 mesh with each other.

To explain the operation of this device, the robot hands 22 and 23 receive control signals from a control device (not shown) and are driven by a drive mechanism (not shown).
The movable stand 21 is moved to the sample container position and lowered. Next, a control signal from the control device is applied to the motor 3.
0, causing the motor 30 to rotate clockwise and drive the rack 28 upwardly via the pinion 29. As a result, the plunger 26 moves upward, and the sample is sucked into the syringe 25 via the needle 30. Next, in response to a control signal from the control device, the robot hands 22 and 23 move the movable pedestal 21 to, for example, a location where a sample injection hole of a gas chromatograph is located and lower it. The motor 30, which receives a control signal from the control device, is rotated counterclockwise, drives the rack 29 downward via the pinion 29, and moves the plunger 26 downward.
The sample sucked into the syringe 25 is discharged through the needle 30.

As is clear from the above explanation, the robot hands 22 and 23 hold the movable pedestal 21, and the motor 3 that drives the syringe separately.
Therefore, it is necessary to make the movable frame strong and to prepare a separate program to drive and control the motor 30.
The structure of the automatic sample injection device itself becomes complicated.

(c) Purpose The present invention solves the drawbacks of the prior art described above, and provides an automatic sample in which a plunger is driven in conjunction with the opening/closing stroke of a drive hand, and the sample is aspirated and discharged in synchronization with this. The purpose is to provide an injection device.

(D) Configuration The present invention has a syringe holder that holds a syringe that has a plunger pushing member that is fitted into a plunger, contacts the head of the plunger, and applies pressure. When the hand is driven, the drive hand holding member that holds the drive hand is driven in one plane direction, and the opening angle of the arm fixedly held by the drive hand holding member and the plunger holding member is controlled to open and close. Drive the fixed plunger push-up member,
The plunger is driven through the plunger head.

(e) Examples Examples of the automatic sample injection device of the present invention are shown below.
This will be explained with reference to FIG. 1, which shows the front and rear views.

FIG. 1A mainly shows the front side of the apparatus according to the present invention, and FIG. 1B mainly shows the back side of the syringe holder.

First, in FIG. 1B, 1 is a syringe holder, and a bent piece 1a is integrally formed on the upper end surface of the syringe holder.
One end of a coil spring 12 is fixed to the lower surface of this bent piece 1a, and the other end is a circular plunger head 1.
It is fixed on the top surface of 1. Plunger head 11
One end of a plunger 10 inserted through a center hole of a plunger push-up member 9 formed as an annular member is fixed to the lower surface of the plunger 10 . The plunger 10 is connected to a piston (not shown) in the syringe 8, and
is a needle, and by driving the plunger 10 upward and downward, the sample is sucked in and discharged through the needle 7.

Next, in FIG. 1A, guide bars 2a and 2b are fixed and supported on the side surface of the syringe holder 1, and hand holding parts 4a and 4a, which are drive hand holding members, are movable relative to the guide bars 2a and 2b.
4b is inserted. This hand holding member 4
Robot hands 3a and 3b, which are driving hands, are fitted into the recesses provided on the outer sides of a and 4b.
Fixed to prevent separation. Coil springs 6a and 6b are installed between the inner surfaces of the hand holding parts 4a and 4b and the left and right sides of the syringe holder 1, and bias the hand holding parts 4a and 4b in the right and left directions, respectively. giving. 5a and 5b are arms, and one end of each is a hand holding part 4a, 4.
The arms _5a and 5b are fixed and held rotatably to the syringe holder 1 by pins P2 and _P3 , and the other ends of arms 5a and 5b are overlapped with each other, and are rotatably held by the syringe holder ₁ by pin P1.
It is fixedly held on the cylindrical side surface of the plunger push-up member 9 located on the back surface of the plunger.

A slit S is provided at the center of the upper part of the syringe holder 1, and the pin _P1 is driven along the longitudinal direction of the slit S. Then, when the robot hands 3a, 3b are driven toward the side surface of the syringe holder 1 against the urging force of the coil springs 6a, 6b, the hand holding parts 4a, 4b
are both moved toward the side of the syringe holder 1, thereby reducing the opening angle θ of the arms 5a and 5b, and moving the pin _P1 upward along the slit S together with the plunger push-up member 9. is brought into contact with the plunger head 11 to apply a pressing force, the plunger head 11 is moved together with the plunger 10 against the biasing force of the coil spring 12, and the sample is sucked into the syringe 8 through the needle 7.

FIGS. 2A to 2B show how the robot hands 3a and 3b are driven and how the plunger 10 and the like are operated in each drive mode below the robot hands 3a and 3b in the apparatus shown in FIG. 1A.

FIG. 2A shows the initial state of the automatic sample injection device when the robot hands 3a and 3b are not driven, and at this time, the plunger push-up member 9, plunger 10, plunger head 11, coil spring 12
similarly assumes the initial state shown. In this initial state, when a driving force is applied to the robot hands 3a, 3b from the direction of the arrow, the robot hands 3a, 3b
3b resists the biasing force of coil springs 6a, 6b, and moves hand holding members 4a, 4b to guide bars 2a, 2b.
along the direction toward the syringe holder 1.
As a result, the opening angle θ of the arms 5a, 5b is made small, the pin _P1 is pushed up, the plunger push-up member 9 is moved and brought into contact with the plunger head 11, and a pushing force is applied thereto. This state is shown in FIG. 2B.

Further, when a driving force is applied to the robot hands 3a, 3b, the hand holding parts 4a, 4b are driven toward the side of the syringe holder 1, the pin _P1 is pushed up further, and the plunger is pushed up via the plunger push-up member 9. The head 11 is moved upward against the biasing force of the coil spring 12. This state is shown in FIG. 2C.

Next, the operation of the apparatus according to the present invention will be explained.

In the initial state shown in FIG. 2A, a drive mechanism (not shown) inputted with a control signal from a control device (not shown) applies a driving force in the direction of the arrow to the robot hands 3a, 3b. As a result, the hand holding parts 4a, 4b are driven toward the side surface of the syringe holder 1 along the guide bars 2a, 2b against the urging force of the coil springs 6a, 6b. Due to this drive, the opening angle θ of the arms 5a and 5b becomes small, and the pin _P1 is moved upward along the slit S together with the plunger push-up member 9. Therefore, the plunger push-up member 9 is moved upward from the state shown in FIG. 2A, and comes into contact with the plunger head 11 as shown in FIG. 2B, thereby applying a pressing force thereto. moreover,
When the driving force continues to be applied to the robot hands 3a, 3b, the hand holding parts 4a, 4b hold the syringe holder 1.
is driven laterally. As a result, arm 5
The opening angle θ of a and 5b becomes even smaller, and the pin P ₁
along the slit S, and move the plunger push-up member 9 further up. Therefore, the plunger push-up member 9 is moved further upward from the state shown in FIG. 2B, and the plunger head 11 is moved upward together with the plunger 10 against the biasing force of the coil spring 12. In this way, the plunger 10 is
As shown in FIG. 2A, the motor is driven by a stroke amount a from the initial position shown in FIG. 2A. The sample is sucked from the needle 7 into the syringe 8 by driving the plunger 10 by the stroke amount a. In addition,
The stroke amount a is adjusted using the robot hands 3a, 3.
This can be easily done by controlling the amount of movement of the arms 5a and 5b and the opening angle θ of the arms 5a and 5b.

(f) Effects As explained above, according to the present invention, a mechanism is provided to drive the plunger push-up member in conjunction with the opening/closing stroke of the drive hand, and the plunger is driven by the plunger push-up member. The sample can be sucked into the syringe and discharged from the syringe in conjunction with the opening/closing operation. Therefore, unlike conventional devices, there is no need to separately provide an automatic control mechanism for energizing the syringe in addition to the drive mechanism of the robot hand. Therefore, the structure itself does not become complicated, and the automatic control mechanism can be operated. You don't need a program for it.

[Brief explanation of the drawing]

1 and 2 show things related to the present invention; FIG. 1A is a front view of an embodiment of the automatic sample injection device of the present invention, FIG. 1B is a rear view of a syringe holder in the embodiment, and The figure shows the operating mode of the device shown in FIG. 1A and the operating mode of the plunger in each operating mode, and FIG. 2A shows a top view of the device shown in FIG. 1A in the initial state and the initial state of the plunger. FIG. 2B is a top view of the device shown in FIG. 1A in a state where the robot hand is driven, and a side view of the device shown in FIG. Figure C is a top view of the robot hand in the final drive state of the device shown in Figure 1A, and a side view of the plunger after it has moved the stroke amount, and Figure 3 is a front view of the conventional device. 1 is a syringe holder, 2a, 2b are guide bars, 3a, 3b are robot hands, 4a, 4b are hand holding parts, 5a, 5b are arms, 6a, 6b
is a coil spring, 7 is a needle, 8 is a syringe, 9
is a plunger push-up member, 10 is a plunger, 11
is the plunger head, 12 is the coil spring, P ₁ , P ₂ ,
_P3 indicates pin and S indicates slit.

Claims (1)

[Scope of utility model registration request] A syringe holder that holds a syringe having a plunger push-up member fitted into a plunger, a plunger head that contacts and is driven by the push-up member, a drive hand that is driven in one plane direction, and one of the drive hands. A drive hand holding member is driven by drive in a planar direction, and is fixed to the drive hand holding member and the plunger pushing up member, and opening/closing of the opening angle in the circumferential direction is controlled by driving the drive holding member, and the plunger pushing up is controlled by driving the drive holding member. An automatic sample injection device including an arm that drives a member in a direction perpendicular to the one plane direction.