JP2014171758A5 - - Google Patents

Description

Chemical injection device

  The present invention relates to an apparatus for injecting a chemical solution into a chemical injection device having a chemical solution storage function.

Infusion is known as a means for injecting a small amount of a chemical into a patient's body. Traditionally, intravenous drip causes a drug solution to fall naturally by gravity and injects the drug into the body.
In recent years, an infusion device for injecting a drug by a pressurizing means instead of the above-described drip by gravity has been developed (Patent Document 1).
As this type of infusion device, an infusion pump (generally referred to as an infusion pump) having only a function of pressurizing a drug and a medicinal solution infusion device having a medicinal solution storage function are known.
The former infusion pump is a pump that connects a patient with a storage container or the like for storing a drug solution or blood, and is a device that pressurizes the drug solution or the like in the storage container and infuses the patient with the patient. It can be said that the infusion pump is a simple pressurizing device in terms of mechanism.
On the other hand, it can be said that the latter chemical | medical solution injection | pouring apparatus is what integrated the storage container and the pressurization mechanism. That is, the latter chemical | medical solution injection | pouring instrument has the chemical | medical solution bag which has elasticity contained in the outer container. The drug solution bag has a structure like a rubber balloon and always has a contracting force.
When using a chemical solution injector, the chemical solution is previously injected into the chemical bag with an injector such as a syringe. In addition, an indwelling needle is attached to the patient in advance.
Then, the drug solution injector is placed near the patient, and the drug solution bag of the drug solution injector and the indwelling needle are connected with an infusion tube.
The drug solution in the drug solution injector is pushed out by the contraction force of the drug solution bag and injected into the patient's body in small amounts via the infusion tube.

JP 2002-276831 A

As described above, when using a chemical liquid injector, it is necessary to inject the chemical liquid into the chemical bag in advance using an injector such as a syringe. Traditionally, this work has been performed manually by a pharmacist. That is, the pharmacist pulls the plunger of the injector to suck the chemical into the syringe of the injector, and connects the tip of the syringe to the connecting portion of the chemical injector. Thereafter, the pharmacist pushes the plunger of the injector to inject the drug in the syringe into the drug solution bag of the drug solution injector.
However, this operation requires a considerable amount of power. That is, the chemical bag of the chemical injection device has a structure like a rubber balloon, and the contraction force always works. Therefore, when introducing the chemical solution into the chemical solution injection device, it is necessary to push the plunger with a force against the contraction force of the chemical solution bag, which requires a considerable amount of force.
Therefore, development of a device for assisting drug injection has been desired.

In addition, the chemical solution injection device is often used by cancer patients at home, and the chemical solution injected into the chemical solution bag may emit radiation or be highly toxic.
For this reason, it may be necessary to perform the operation of injecting the chemical into the chemical injection device described above in the safety cabinet. As is well known, a safety cabinet is a glass work shelf with a ventilation function, and an operator stands outside the safety cabinet and inserts a hand through a small window. Therefore, it is difficult for the operator to apply force and to push the plunger sufficiently.

  Accordingly, the present invention focuses on the above-mentioned problems of the prior art and develops a chemical injection device that assists the operation of injecting a chemical into a chemical injection device and can also be placed in a safety cabinet. It is an object to do.

In order to solve the above-mentioned problems, we made prototypes of chemical injection devices with various structures and examined their performance. Specifically, a type that holds the syringe horizontally and pushes the plunger and a type that holds the syringe in a vertical posture and pushes the plunger were prototyped.
As a result, all had some drawbacks.

That is, the former type of liquid injector that holds the syringe horizontally and pushes the plunger has a problem that the posture of the syringe is stable, but the occupied area when the apparatus is installed is large. For this reason, it has been found that a chemical injection device that holds the syringe horizontally and pushes the plunger is too large to be placed in a safety cabinet for work.
Further, when the syringe is held horizontally, when the chemical solution is accumulated in the chemical solution injection device, the connection portion of the chemical solution injection device is subjected to bending stress due to the weight of the chemical solution injection device, and the connection portion may be damaged.

  On the other hand, the latter type of liquid injector that holds the syringe in a vertical posture and pushes the plunger does not take up space and does not apply bending stress to the connection part, but has a problem that the posture of the syringe is unstable. It was. That is, when the syringe is in a vertical posture, the degree of freedom of the posture of the syringe is high, and the axis of the syringe may be slightly deviated from the vertical line for some reason. On the other hand, since the plunger is pressed with a considerably strong force, there is a problem that the syringe is inclined by the force and finally the syringe comes off.

  Therefore, the inventors have made a prototype of a chemical injection device having a structure in which the syringe is supported while being slightly inclined from the vertical posture. In the chemical injection device having this structure, since the syringe is slightly tilted out of the vertical posture, it falls into a specific posture by its own weight, and the stability of the syringe is high. Moreover, since the syringe is close to a vertical posture, it is close to a standing posture and has a small footprint.

  The invention described in claim 1 was developed based on these findings, and is a chemical solution injection device that injects a chemical solution into a separately prepared chemical injection device using a separately prepared injector and is used. The injector includes a flange portion and a body portion, a syringe having a chemical solution storage space inside the body portion and a chemical solution discharge port at the tip, a tip side disposed in the drug solution storage space of the syringe, and a rear end side thereof The plunger that is exposed from the syringe includes a syringe holding part that holds the syringe, and a pusher that pushes the plunger by power, and the syringe holding part supports a flange part of the injector. The syringe has a flange support, and the syringe is mounted on the syringe holding portion in a posture in which the flange is engaged with the flange support and the drug solution outlet side faces downward. A chemical liquid injector, characterized in that the axis is supported in a posture inclined with respect to the vertical line.

The invention according to claim 2 is a chemical injection device to which an injector and a chemical injection device are attached. The injector includes a flange portion and a trunk portion, and has a chemical reservoir space inside the trunk portion. A syringe provided with a chemical solution discharge port at the tip, a plunger having a tip side arranged in the chemical solution storage space of the syringe and a rear end side exposed from the syringe, the chemical solution injection device includes a syringe holding unit that holds the syringe, The syringe holding part has a flange support part that supports the flange part of the injector, and the injector engages the flange part with the flange support part so that the medicine discharge port side is lowered. The syringe is attached to the syringe holding portion in a posture directed toward the body, and the injector is supported in a posture in which the axis is inclined with respect to the vertical line.

According to a third aspect of the present invention, the syringe holding part has a body holding part for holding the body part of the injector, and the body holding part is below the flange support part, and the axis of the injector 3. The chemical injection device according to claim 1 , wherein the medical device is in contact with the body portion of the syringe so as to be inclined at an angle of 45 degrees or less with respect to the vertical line.

Invention according to claim 4, wherein the body holding portion, the drug solution according to claim 3, injector axis and wherein the contact with the body portion so as inclined at an angle of within 20 degrees with respect to the vertical direction An injection device.

According to a fifth aspect of the present invention, the body holding portion has one or more contact members, and the contact members are in contact with the side surfaces of the body portion, and further than the contact member provided at the bottom. 5. The chemical injection device according to claim 3 , wherein there is a device arrangement space in which the chemical injection device is suspended at a lower position.

  In the present invention, there is a device arrangement space in which the drug solution injection device is suspended at a position lower than the contact member provided at the bottom. Therefore, the chemical solution injector is suspended in a vertical posture from the tip of the syringe, and no bending stress is applied to the connection portion.

According to a sixth aspect of the present invention, the flange support portion includes a flange portion contact portion that contacts the lower surface side of the flange portion, and a surrounding portion that surrounds the periphery of the body portion, and the body portion is provided in the surrounding portion. There is an open port for loading and unloading, there is a movable portion in the vicinity of the mouth opening, any of claims 1 to 5 the movable part is characterized by being urged in the direction of opening frontage of the open mouth is narrowed It is a chemical | medical solution injection | pouring apparatus of a crab

In the chemical injection device according to the present invention, the flange support portion includes an encircling portion that surrounds the periphery of the body portion, and a movable portion that is urged in a direction in which the opening front of the enveloping portion narrows is provided.
Therefore, the syringe is difficult to be separated from the flange support portion, and the posture of the syringe is stabilized.

The invention described in claim 7 has a motor for driving the pusher, and the pusher receives power transmission from the motor and moves linearly to press the plunger, and the motor is overloaded. The chemical injection device according to any one of claims 1 to 6 , wherein the motor stops after a certain time has elapsed.

  In the chemical injection device of the present invention, the pusher continues to press the plunger for a certain time even after the tip of the plunger reaches the bottom of the syringe and the pusher stops. Here, the injector is often provided with a rubber protrusion at the tip of the plunger, and the pusher continues to press the plunger, so that the protrusion is deformed and pushes out the chemical solution remaining on the bottom of the plunger. Therefore, according to the chemical injection device of the present invention, the chemical can be injected into the chemical injection device without waste.

The invention of claim 8 includes a presence detection sensor for detecting the presence or absence of the syringe, according to any one of claims 1 to 7 the presence detection sensor is characterized in that provided on the syringe holder This is a chemical liquid injection device.

  According to the chemical injection device of the present invention, it can be confirmed that the syringe is correctly attached to the syringe holding portion.

The invention described in claim 9 is a chemical liquid injection device for injecting a chemical liquid into a separately prepared chemical injection apparatus using a separately prepared injector, and the injector to be used includes a flange part and a body part. A syringe provided with a chemical solution storage space inside the body portion and a chemical solution discharge port at the tip, and a plunger that the distal end side is arranged in the chemical solution storage space of the syringe and the rear end side is exposed from the syringe, The chemical injection device has a syringe holding unit that holds the syringe, a pusher that pushes the plunger using a motor as a power source, a device arrangement space in which the chemical injection device is suspended, and a presence detection sensor that detects the presence or absence of the syringe, The syringe holding part has a flange support part for supporting the flange part of the injector and a body holding part for holding the body part of the injector. A flange portion abutting portion that abuts the lower surface side of the body portion, and a surrounding portion that surrounds the periphery of the body portion, and the surrounding portion has an opening for taking in and out the body portion, There is a movable part in the vicinity, and the movable part is urged in a direction in which the opening front of the opening is narrowed, the presence detection sensor is provided in the flange support part, and the injector has a flange part in the flange support part. It is attached to the holding part in a posture in which the chemical solution discharge port side is directed downward, and the body holding part is below the flange support part and has one or more contact parts, and the contact part Is in contact with the body of the syringe so that the axis of the injector is inclined at an angle of 20 degrees or less with respect to the vertical line, and there is the instrument placement space at a position lower than the contact member provided at the bottom, The motor detects the presence of the syringe by the presence detection sensor. The pusher receives the power transmission from the motor and moves linearly to press the plunger. After the motor is overloaded, the pusher waits for a certain period of time. And the motor is stopped.

  In the chemical injection device of the present invention, since the syringe is slightly tilted out of the vertical posture, the stability of the syringe is high. Moreover, since the syringe is close to a vertical posture, it is close to a standing posture and has a small footprint.

The invention according to claim 10 has an inclined surface inclined so that the lower side protrudes, and the syringe holding part is provided on the inclined surface. It is a chemical | medical solution injection device of description.

  INDUSTRIAL APPLICATION The chemical | medical solution injection device of this invention has an effect which can reduce the operation | work of the pharmacist at the time of inject | pouring a chemical | medical solution into a chemical | medical solution injection device. Moreover, even if it puts in the chemical | medical solution injection device of this invention in a safety cabinet, it is hard to get in the way.

It is a perspective view of the chemical injection device of the embodiment of the present invention. FIG. 2 is a perspective view of a state in which a chemical liquid injector and an injector are attached to the chemical liquid injector of FIG. 1. It is a perspective view which shows notionally the internal structure of the chemical injection device of FIG. It is a top view which shows the relationship between the flange support part of the chemical | medical solution injection device of FIG. 1, and a syringe, (a) shows the state before mounting | wearing with a syringe, (b) shows the intermediate state which mounts | wears with a syringe. (C) shows a state after the syringe is mounted. It is a side view which shows the relationship between the chemical | medical solution injection device of FIG. 1, an injector, and a chemical | medical solution injection | pouring apparatus, and shows the state before mounting | wearing an injector. It is a side view which shows the relationship between the chemical | medical solution injection device of FIG. 1, an injector, and a chemical | medical solution injection | pouring apparatus, and shows the state after mounting | wearing an injector. It is a side view which shows the relationship between the chemical | medical solution injection | pouring apparatus of FIG. 1, an injector, and a chemical | medical solution injection device, and shows the state which complete | finished injection | pouring of the chemical | medical solution from the injector with respect to the chemical injection device. It is sectional drawing explaining the state in an injection device. It is a front view (a), a left side view (b), a right side view (c), and a rear view (d) of the chemical liquid injector of the embodiment of the present invention. It is the top view (e) and bottom view (f) of the chemical injection device of the embodiment of the present invention.

Embodiments of the present invention will be further described below.
The chemical injection device 1 according to the present embodiment assists the operation of injecting the chemical into the chemical injection device 200.
The chemical injection device 1 of the present embodiment is a vertical device as shown in the figure, and is provided with a syringe holding portion 3, a pusher 5, and an instrument arrangement space 6 on the front side of the main body portion 2. .
The main body 2 includes a columnar part 10, an inclined base part 11, and a pedestal part 12.

The shape of the columnar part 10 is a shape that can be said to be a quadrangular frustum, and is a shape in which one surface of the square column is an inclined surface.
That is, in the columnar section 10, the front wall 15 is an inclined wall, and the other four side walls 16, 17, 18 are upright walls. More specifically, the columnar portion 10 includes a front wall 15, left and right side walls 16, 17, a back wall 18, and a top wall 20.
Only the front wall 15 is inclined with respect to the vertical plane, and the other four side walls 16, 17, 18 are erected in a vertical posture.

The inclination angle of the front wall 15 is not particularly limited, but the angle at which the corner of the body portion 102 of the syringe 101 described later does not become lower than the chemical solution discharge port 107 is the maximum inclination angle.
That is, the syringe 101 has various sizes and shapes. There are also various shapes and structures of the chemical injection device 200. Therefore, depending on the syringe 101 and the chemical injection device 200, the effects of the present invention may be exhibited even when the inclination angle is considerably large (for example, an angle exceeding 45 degrees).
The inclination angle of the front wall 15 recommended when using the syringe 101 having a general shape is within 45 degrees, and further preferably within 20 degrees.
The lower limit of the inclination angle of the front wall 15 is not particularly limited, but is preferably 3 degrees or more. It is further recommended that the angle is 5 degrees or more.
In the present embodiment, the front wall 15 is inclined 10 degrees with respect to the vertical plane.
The posture of the front wall 15 is a posture that protrudes toward the front surface side toward the lower surface side. Therefore, as shown in FIG. 1, the cross-sectional shape of the bottom of the columnar portion 10 is a square, and the cross-sectional area becomes smaller toward the top.

The inclined base part 11 is a rectangular parallelepiped base having a low height, and is provided on the upper side of the front wall 15.
As described above, since the front wall 15 is inclined by about 10 degrees with respect to the vertical plane, the front plate 21 of the inclined platform 11 is inclined by about 10 degrees with respect to the vertical plane.
Since the inclined base part 11 is provided on the upper side of the front wall 15 of the columnar part 10 as described above, the lower side of the front wall 15 is an empty space. That is, since the inclined base part 11 protrudes from the front wall 15 of the columnar part 10 to the front side, an instrument arrangement space 6 is formed between the lower part of the inclined base part 11 and the front part of the front wall 15. Yes.
In this embodiment, since the shape of the inclined base part 11 is a rectangular parallelepiped, the lower surface of the inclined base part 11 is stepped.

The pedestal 12 is made of a resin having a thickness that is larger than the plane-occupied area of the columnar portion 10 and about 5 mm to 10 cm, and has a considerable area and weight.
On the front side of the pedestal portion 12, a notch portion 23 that is largely cut out as shown in FIG. 1 is provided.
The shape of the notch 23 is a circular arc of a string corresponding to the width of the columnar part 10. Therefore, the instrument arrangement space 6 formed on the front side of the lower part of the columnar part 10 is further expanded to the lower side by the notch part 23.
The pedestal portion 12 may be made of metal.

The syringe holding part 3 and the pusher 5 are provided on the front plate 21 of the inclined base part 11 described above.
As shown in FIG. 1, the syringe holding unit 3 is in a half area under the front plate 21, and is at the height of the central area when viewed from the whole of the drug solution injector 1.
In this embodiment, the syringe holding part 3 has a flange support part 30 that supports the flange part 103 of the injector 100 and a body holding part 29 that holds the body part 102 of the injector 100.

The flange support part 30 is spaced apart from the rear side wall 32 substantially parallel to the front plate 21 side of the inclined base part 11, the left side wall 31 provided substantially vertically with respect to the inclined base part 11, and the left side wall 31. It has a right side wall 33 which is opposed and is provided substantially vertically with respect to the inclined base part 11. In addition, the inner peripheral surfaces of the rear side wall 32 and the left and right side walls 31 and 33 are gently connected by circular arc surfaces.
In the present embodiment, the inner peripheral surface of the flange support portion 30 functions as the surrounding portion 38 surrounding the body portion 102 of the syringe 101. Further, the upper surface of the flange support part 30 functions as the flange part contact part 37.
As described above, since the left side wall 31 and the right side wall 33 are opposed to each other with a space therebetween, the flange support portion 30 has a large opening 35 in the center portion in plan view. The size of the opening 35 is larger than the outer diameter of the injector 100 that is scheduled to be used. When there are a plurality of injectors 100 to be used, the outer diameter of the largest injector 100 is larger.
There is no wall surface on the front side of the opening 35. Therefore, the opening 35 has an opening 36 on the front side.
Therefore, the flange support part 30 is “U” -shaped when viewed from above, and the front side is open.

In addition, movable members 40 a and 40 b are provided in the inner peripheral portions of the left side wall 31 and the right side wall 33 and in the vicinity of the opening 36. The movable members 40a and 40b are both provided in the inner peripheral portions of the left side wall 31 and the right side wall 33 so as to be able to appear and retract. The movable members 40a, 40b are biased in the protruding direction by springs 43a, 43b built in the left side wall 31 and the right side wall 33. Therefore, the movable members 40a and 40b normally protrude from the left side wall 31 and the right side wall 33 by the springs 43a and 43b, and narrow the opening between the open ports 36.
Further, when an external force is applied, the movable members 40a and 40b move toward the left side wall 31 and the right side wall 33 against the springs 43a and 43b, and the opening of the opening 36 is widened.
In the present embodiment, the movable members 40 a and 40 b also function as the surrounding portion 38 surrounding the body portion 102 of the syringe 101.

A presence detection sensor 50 is provided at the base of the right side wall 33 of the flange support 30. The presence detection sensor 50 is a mechanical micro switch, and emits an ON signal when pressed against an object.
A reflection type optical sensor may be employed as the presence detection sensor 50. The presence detection sensor 50, which is an optical sensor, emits an ON signal when something approaches.

Next, the body holding part 29 will be described. The body holding unit 29 includes two contact members 45 and 46 that come into contact with the side surface (body unit 102) of the syringe 101.
The contact members 45 and 46 have the same shape and structure, and are pillow bodies having a gentle arc surface 47 on the front surface. That is, the contact members 45 and 46 are walls having a narrow width W and a low height H, and the wall surface on the front side has an arc shape.

The two contact members 45, 46 are attached to the lower position of the flange support portion 30 side by side. That is, the contact member 45 is located slightly below the flange support portion 30, and the contact member 46 is provided at a slight distance.
The center point of the inner wall of the back side wall 32 of the flange support portion 30 and the center of the arc surface 47 of the contact members 45 and 46 are aligned on a straight line. The imaginary straight line 51 is parallel to the front plate 21 of the inclined base part 11.

Next, the pusher 5 will be described.
The pusher 5 is a cubic member, and is engaged with an internal mechanism through a slit 48 provided in the front plate 21 of the inclined base portion 11.
In other words, as shown schematically in FIG. 3, a guard motor 55 and a ball screw 56 are built in the main body 2 of the chemical liquid injector 1. The geared motor 55 and the ball screw 56 are coupled by a gear train 57, and the ball screw 56 is rotated by the rotational force of the guarded motor 55. The pusher 5 is connected to a ball nut 58 provided on the ball screw 56.
Therefore, when the guard motor 55 is driven, the pusher 5 moves linearly along the front plate 21 of the inclined base portion 11.

Next, operation | movement of the chemical injection device 1 of this embodiment is demonstrated along a chemical injection process.
First, as a previous step, a chemical solution injector 200 and an injector 100 are prepared.
The chemical injection device 200 has a structure similar to that of a known one, and has an elastic chemical solution bag 202 built in an outer container 201 as shown in FIG. Further, the connecting portion 203 of the chemical solution injector 200 is connected to the internal chemical solution bag 202.
One of the chemical injection devices 200 is an “infuser pump” manufactured by Baxter Corporation. Of course, the usable chemical injection device 200 is not limited to the “infuser pump”.

The injector 100 uses a known syringe and includes a resin syringe 101 and a plunger 110.
The syringe 101 is a cylindrical container and has a chemical solution storage space 105 inside. A chemical solution discharge port 107 is provided at the tip of the chemical solution storage space 105. The rear end side of the syringe 101 is open. A plurality of protrusions 113 are provided at the bottom of the chemical solution storage space 105 of the syringe 101. The protrusion 113 is for creating an air escape space in the syringe 101.
As described above, the outer shape of the syringe 101 is cylindrical and has a body section 102 having a circular cross section, and a flange section 103 is provided in the vicinity of the open end side. The flange portion 103 is a portion where a finger is hooked when the plunger 110 is pressed.

Plunger 110 is a piston and is a substantially cylindrical rod. As shown in FIG. 8, a rubber seal member 111 is provided at the tip of the plunger 110. The seal member 111 has a disk shape, and the peripheral surface is in contact with the inner surface of the syringe 101.
In other words, the injector 100 is a known syringe, and is originally made for the purpose of injecting a drug solution into the veins of the human body.
The syringe 101 of the injector 100 is provided with a plurality of protrusions 113 as described above. This protrusion 113 is for making an air escape space in the syringe 101 as described above.
That is, since it is not preferable that air enters a human vein, an air escape space 108 (FIG. 8b) is created in the syringe (injector 100) to prevent the plunger 110 from pushing out the air in the syringe 101. It is done. The protrusion 113 described above is for creating the air escape space 108. When the doctor pushes the plunger 110 and the tip reaches the vicinity of the bottom of the syringe 101, the protrusion 113 comes into contact with the bottom of the syringe 101. Further, the plunger 110 is prevented from moving forward.

Then, the chemical solution outlet 107 of the syringe 101 is connected to a chemical solution container (not shown), and the plunger 110 is pulled to introduce the chemical solution into the syringe 101.
Subsequently, the chemical solution discharge port 107 of the syringe 101 is connected to the connection portion 203 of the chemical solution injection device 200.

In this state, as shown in FIG. 5, the syringe 101 is brought close to the chemical solution injector 1 and the syringe 101 is placed on the syringe holding unit 3. More specifically, as shown in FIGS. 2 and 6, the flange portion 103 of the syringe 101 is engaged with the flange support portion 30 with the medicine discharge port 107 facing down. More specifically, the lower surface of the flange portion 103 is placed on the upper surface of the flange support portion 30 that is the flange contact portion 37.
In actual work, the body 102 of the syringe 101 is pushed into the opening 35 from the opening 36 on the front side of the flange support 30.
Here, in the chemical injection device 1 of the present embodiment, the movable members 40a and 40b are provided in the vicinity of the opening 36 of the flange support portion 30, and the movable members 40a and 40b are both springs 43a and 43b. It is biased in the protruding direction. However, as described above, when an external force is applied, the movable members 40a and 40b move to the left side wall 31 and the right side wall 33 side against the springs 43a and 43b, and the opening 36 is widened.
Therefore, when the body 102 of the syringe 101 is pushed into the opening 35 from the opening 36 on the front surface side of the flange support 30, the movable members 40a and 40b escape and the opening 36 expands as shown in FIG. The body of the syringe 101 enters the opening 35 of the flange support 30.

When the hand is released from the syringe 101, the syringe 101 moves downward due to the weight of the chemical injection device 200, and the lower surface of the flange portion 103 hits the flange contact portion 37 and stops dropping.
Then, the movable members 40a and 40b provided in the vicinity of the opening 36 of the flange support portion 30 are returned to the protruding state by the biasing force of the springs 43a and 43b, and the opening of the opening 36 is narrowed.
In this state, 180 degrees or more of the body portion 102 of the syringe 101 is surrounded by the inner peripheral surface of the flange support portion 30 and the movable members 40a and 40b.
That is, the periphery of the body portion 102 of the syringe 101 is surrounded by the inner peripheral surface of the flange support portion 30 that functions as the surrounding portion 38 and a part of the movable members 40a and 40b.

Further, since the front plate 21 of the inclined base part 11 is inclined so that the lower side protrudes toward the front side, the body part 102 of the injector 100 is in contact with the rear side wall 32 of the flange support part 30. Furthermore, the middle part and the lower part of the syringe 101 are in contact with the front surfaces of 45 and 46 by contact members.
Here, the center point of the inner wall of the back side wall 32 of the flange support portion 30 and the center of the arc surface 47 of the contact members 45 and 46 are aligned on a straight line, and the virtual straight line 51 is the front plate of the inclined base portion 11. 21, the syringe 101 is in contact with the circular arc surface 47 of the contact members 45 and 46 in a posture inclined with respect to the vertical line.

  That is, since the syringe 101 is held in a state of being inclined in parallel with the front plate 21 of the inclined base part 11, the syringe 101 is in contact with the arcuate surfaces 47 of the contact members 45 and 46 in a posture inclined by 10 degrees with respect to the vertical line. Touch.

  In addition, since the instrument placement space 6 is located further below the lower contact member 46, the chemical injection device 200 is suspended in the instrument placement space 6.

Therefore, in the injector 100 and the chemical solution injector 200, the body portion 102 of the syringe 101 of the injector 100 and a portion near the flange portion 103 is in contact with the back side wall 32 of the flange support portion 30. Further, the body portion 102 of the syringe 101 of the injector 100 and a portion in the vicinity of the flange portion 103 is surrounded by the inner wall of the flange support portion 30 that is the surrounding portion 38 and the movable members 40a and 40b, and an intermediate portion of the syringe 101, The body portion 102 of the syringe 101 is held at 45 and 46 by the contact member of the body holding portion 29 at two locations near the tip. That is, since the syringe 101 of the injector 100 is in an inclined posture, the syringe 101 is pressed against the back side wall 32 and the contact member 45 and 46 by its own weight.
As a result, the injector 100 has a low degree of freedom of posture change and is stable in an inclined posture. In addition, the movable members 40a and 40b are returned to their original positions by the springs 43a and 43b, and the opening of the opening 36 is narrowed to prevent the injector 100 from being detached.

  Therefore, the injector 100 is stabilized at the regular position, and the presence detection sensor 50 detects the injector 100 and issues an ON signal.

Further, the plunger 110 of the injector 100 is pulled up as shown in FIG. 2, and the pusher 5 is waiting on the plunger 110.
When the activation switch is turned on in this state, the presence detection sensor 50 detects the injector 100 and transmits an ON signal, so that the guard motor 55 is driven. Then, the ball screw 56 engaged with the gear train 57 rotates, and the pusher 5 linearly moves downward along the front plate 21 of the inclined base portion 11.

The lower surface of the pusher 5 comes into contact with the upper surface of the plunger 110, and the pusher 5 further moves to push down the plunger 110. As a result, the chemical solution in the syringe 101 is filled into the chemical solution bag 202 of the chemical solution injection device 200 via the chemical solution discharge port 107.
When the tip of the plunger 110 reaches the bottom of the syringe 101, the protrusion 113 provided at the tip of the plunger 110 contacts the bottom surface of the syringe 101, and the pusher 5 is forcibly stopped. However, since the energized state of the guard motor 55 is maintained, an excessive current flows through the guard motor 55.
In the chemical injection device 1 of the present embodiment, when it is detected that an overcurrent has flowed through the guard motor 55, the energization is maintained for a certain period of time, and then the energization of the guard motor 55 is stopped.

  That is, the chemical injection device 1 according to the present embodiment includes an overcurrent detection unit that detects an overcurrent and a timer, and the timer starts timing when the overcurrent detection unit detects the overcurrent. When the timer counts a certain time, the energization to the guard motor 55 is stopped.

  In the chemical injection device 1 of the present embodiment, the pusher 5 continues to push the plunger 110 for a certain period of time even after the protrusion 113 provided at the tip of the plunger 110 contacts the bottom surface of the syringe 101. b) As shown in (c), the projection 113 provided at the tip of the plunger 110 is compressed and contracted, and the air escape space in the syringe is crushed. Therefore, all the chemical solution in the syringe is discharged and filled in the chemical solution injection device 200.

In the embodiment described above, the injector 100 is held in a posture inclined by 10 degrees with respect to the vertical direction, but this angle is not limited. However, the inclination posture of the injector 100 is preferably close to vertical, and is preferably at least 45 degrees or less.
A desirable inclination angle is within 20 degrees.

Since the chemical injection device 1 of the present embodiment holds the injector 100 in a vertical posture, the occupation area of the chemical injection device 1 is small, and even if it is installed in a safety cabinet, it does not get in the way.
Moreover, since the axis of the chemical injection device 200 and the axis of the injector 100 are substantially aligned, the connecting portion of the chemical injection device 200 is not subjected to bending stress, and the connection portion 200 is not damaged. Moreover, since the chemical | medical solution injection apparatus 1 of this embodiment hold | maintains the injection device 100 in a vertical position, the chemical | medical solution in the injection device 100 can be discharged | emitted completely.
In addition, since the injector 100 is held in a slightly inclined posture, many surfaces of the injector 100 lean against the syringe holding unit 3 by its own weight, and the posture of the injector 100 is stabilized.
In addition, the syringe 101 of the injector 100 is surrounded by 180 degrees or more by the inner peripheral surface of the flange support portion 30 and the movable members 40a and 40b. The peripheral surface of the syringe 101 is also held by the arc surface 47 of the contact members 45 and 46.
Therefore, the injector 100 has only a degree of freedom to move in the vertical direction from the syringe holding unit 3, and the posture is hardly changed even if it is pushed by the pusher 5, and is difficult to come off.

That is, when the upper side of the injector 100 is about to fall forward, the injector 100 tries to rotate with the upper flange support portion 30 as a fulcrum, but contacts the position away from the flange support portion 30 as the fulcrum. There are members 45 and 46, and the middle part and the lower side of the injector 100 are in contact with the contact members 45 and 46.
In particular, there is a lower contact member 46 at a position far from the fulcrum flange support 30, and the lower side of the injector 100 is in contact with the contact member 46.
Therefore, the moment about the flange support 30 of the injector 100 as a fulcrum is offset by the reaction force received from the contact members 45 and 46, and the posture of the injector 100 is not lost.

On the contrary, when the lower side of the injector 100 tries to move away from the front side, the lower side tries to rotate the injector 100 with the contact member 46 as a fulcrum, but it is far from the contact member 46 as a fulcrum. There is a flange support 30, and the upper side of the injector 100 is in contact with the flange support 30. Therefore, the moment with the contact member 46 of the injector 100 as a fulcrum is offset by the reaction force received from the flange support portion 30, and the posture of the injector 100 does not collapse.
In addition, the flange portion 103 of the injector 100 or the vicinity thereof may directly contact the front wall 15 of the inclined base portion 11, and in this case, the moment is canceled by the reaction force received from the front wall 15.
The contact member 45 on the upper side is located at a position away from the contact member 46 serving as a fulcrum, and the moment is canceled by the reaction force received from the contact member 45, which contributes to maintaining the posture of the injector 100.

  Moreover, since the chemical | medical solution injection device 1 of this embodiment has a large lower surface area and a large weight on the lower side, the main body itself does not fall down.

Moreover, in the chemical | medical solution injection device 1 of this embodiment, the large notch part 23 is provided in the front side of the base part 12 as mentioned above, and the instrument arrangement | positioning space 6 is expanded substantially to the lower part side.
Therefore, the chemical injection device 1 of this embodiment can be equipped with a larger chemical injection device 200. In other words, even if the chemical injection device 1 can be equipped with the chemical injection device 200 having the same height, if the cutout portion 23 is provided on the front side of the pedestal portion 12, the total height of the chemical injection device 1 is reduced. Can do. The medicinal solution injection device 1 of the present embodiment is particularly notable for improved usability due to the fact that the height of the flange support 30 can be reduced.
That is, the chemical liquid injector 1 may be installed and operated in a safety cabinet. Here, the safety cabinet generally has an operation port for inserting a hand near the lower part of the work shelf. Therefore, it is difficult for the operator to reach the high position. In particular, since the flange support portion 30 is a portion where the injector 100 is engaged by the operator's hand, the lower the position, the higher the operability.
Also from this point, the chemical injection device 1 of this embodiment is easy to use.

DESCRIPTION OF SYMBOLS 1 Chemical injection device 2 Main body part 3 Syringe holding | maintenance part 5 Pusher 6 Instrument arrangement | positioning space 29 The trunk | body holding | maintenance part 30 Flange support part 36 Opening port 37 Flange part contact part 38 Enclosure part 40a, 40b Movable member 43a, 43b Spring 45, 46 Contact Member 50 Presence detection sensor 100 Syringe 101 Syringe 102 Body part 103 Flange part 105 Drug storage space 107 Drug solution outlet 110 Plunger 200 Drug solution injection device

Claims (10)

A chemical injection device that injects a chemical into a separately prepared chemical injection device using a separately prepared injector, and the injector to be used includes a flange part and a body part, and a chemical liquid storage space is provided inside the body part. A syringe provided with a chemical liquid discharge port at the tip and a plunger that the distal end side is disposed in the chemical liquid storage space of the syringe and the rear end side is exposed from the syringe,
The chemical liquid injector includes a syringe holding unit that holds the syringe, and a pusher that pushes the plunger by power,
The syringe holding part has a flange supporting part for supporting the flange part of the injector, and the injector is attached to the syringe holding part in a posture in which the flange part is engaged with the flange supporting part and the drug solution outlet side faces downward. A chemical solution injector, which is mounted, and the injector is supported in a posture in which an axis thereof is inclined with respect to a vertical line. An injector and a chemical injection device to which a chemical injection device is attached, the injector having a flange part and a body part, a medicine storage space inside the body part, and a syringe having a medicine solution outlet at the tip And the front end side is arranged in the drug solution storage space of the syringe, the rear end side is provided with a plunger exposed from the syringe,
The chemical injection device includes a syringe holding unit that holds a syringe, and a pusher that pushes a plunger by power,
The syringe holding part has a flange supporting part for supporting the flange part of the injector, and the injector is attached to the syringe holding part in a posture in which the flange part is engaged with the flange supporting part and the drug solution outlet side faces downward. A chemical solution injector, which is mounted, and the injector is supported in a posture in which an axis thereof is inclined with respect to a vertical line. The syringe holding part has a body holding part for holding a body part of an injector, the body holding part is below the flange support part, and an axis of the injector is within 45 degrees with respect to a vertical line. The chemical solution injection device according to claim 1 , wherein the medical solution injection device is in contact with the body portion of the syringe so as to be inclined at an angle. The chemical solution injection device according to claim 3 , wherein the trunk holding portion is in contact with the trunk portion so that an axis of the injector is inclined at an angle of 20 degrees or less with respect to a vertical direction. The body holding part has one or two or more contact members, and the contact members are in contact with the side surfaces of the body part, and the chemical solution injection device is suspended at a position lower than the contact member provided at the bottom. The medical fluid injection device according to claim 3 or 4 , wherein there is an instrument placement space. The flange support part has a flange part contact part that contacts the lower surface side of the flange part, and a surrounding part surrounding the periphery of the body part, and the surrounding part has an opening for taking in and out the body part, the opening port near the there is a movable part of the liquid injector according to any one of claims 1 to 5 the movable part is characterized in that it is biased in a direction opening frontage of the open mouth is narrowed. A motor that drives the pusher, and the pusher moves linearly by receiving power transmission from the motor and presses the plunger, and after the motor is overloaded, waits for a certain period of time. liquid injector according to any one of claims 1 to 6 motor is characterized in that the stop. The chemical injection device according to any one of claims 1 to 7 , further comprising a presence detection sensor that detects presence or absence of a syringe, wherein the presence detection sensor is provided in the syringe holding unit. A chemical injection device that injects a chemical into a separately prepared chemical injection device using a separately prepared injector, and the injector to be used includes a flange part and a body part, and a chemical liquid storage space is provided inside the body part. A syringe provided with a chemical liquid discharge port at the tip and a plunger that the distal end side is disposed in the chemical liquid storage space of the syringe and the rear end side is exposed from the syringe,
The chemical injection device has a syringe holding unit that holds the syringe, a pusher that pushes the plunger using a motor as a power source, a device arrangement space in which the chemical injection device is suspended, and a presence detection sensor that detects the presence or absence of the syringe,
The syringe holding part has a flange support part that supports the flange part of the injector, and a body holding part that holds the body part of the injector,
The flange support part has a flange part contact part that contacts the lower surface side of the flange part, and an enclosure part that surrounds the periphery of the body part, and the enclosure part has an opening for taking in and out the body part. There is a movable part in the vicinity of the opening, and the movable part is biased in the direction in which the opening front of the opening narrows,
The presence detection sensor is provided on the flange support portion,
The injector is attached to the holding portion in a posture in which the flange portion is engaged with the flange support portion and the chemical solution outlet side faces downward,
The body holding part has one or more contact parts below the flange support part, and the contact parts are syringes so that the axis of the injector is inclined at an angle of 20 degrees or less with respect to the vertical line. In contact with the body of the
There is the instrument placement space at a position further below the contact member provided at the bottom,
The motor is driven on the condition that the presence detection sensor detects the presence of the syringe, and the pusher receives power transmission from the motor to move linearly and press the plunger. A chemical injection device characterized in that the motor stops after a certain period of time has elapsed after becoming a loaded state. The medicinal solution injection device according to any one of claims 1 to 9, further comprising an inclined surface that is inclined so that a lower side protrudes, and the syringe holding portion is provided on the inclined surface.