JPS6350558Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an elevating device that is particularly suitable for medical equipment, has smooth vertical movement, and generates very little noise.

(Prior art and its problems) Conventionally, this type of vertical movement mechanism uses, for example, a worm gear, but the vertical movement is not smooth, especially for medical equipment, testing equipment, etc. that require precision. However, there were problems in that sufficient accuracy could not be obtained and the noise was relatively loud.

The present invention provides an elevating device that has extremely smooth vertical movement and low noise, and is particularly suitable for medical equipment and the like.

(Means for solving the problem) In order to achieve the above purpose, a rack having a straight groove in the center and teeth on both sides, and a rail having a straight groove in the center as well. Two of the four wheels, which are rotatably supported at the four corners of a rectangle above the object to be lifted and lowered, are arranged facing each other at a fixed interval, and the other two are in the groove of the rail. A pinion connected to a motor fixed and installed on the object to be lifted and lowered is engaged with the teeth of the rack, and the object to be lifted and lowered is moved up and down by rotation of the motor.

(Example) Examples will be described in detail below with reference to the drawings.
This embodiment is an example in which the elevating device is applied to a radiation drug solution dispensing device.

In recent years, radioisotopes (RI) are administered into patients' bodies and used as tracers for diagnosis. Radiological diagnosis is actively performed. In this case, since radioactivity is emitted from the chemical solution itself, there is an extremely high risk that the operator will be exposed to radiation during handling.

FIG. 5 shows a conventional method for dispensing this type of chemical solution. In Figure 5, 1 is a container containing a radioactive drug solution (hereinafter referred to as IR) (vial bottle), 2 is a shield made of lead etc. to prevent radioactivity from being released outside (vial shield), 3
4 is a syringe for dispensing the required amount of IR, 4 is a shield made of lead etc. that is placed over the cylinder part of syringe 3 to prevent radiation from emitting outside, 5
is a lead glass that allows the scale of the syringe inside to be seen.

The operator holds the syringe 3 equipped with the shield 4 in his hand, sticks the needle into the mouth of the container 1, and inserts the piston 3a.
After pulling the needle and dispensing the required amount of IR, the needle is pulled out and injected directly into the patient.

However, in the conventional dispensing method described above, even though the shields 2 and 4 are installed, they are not perfect, so radioactivity leaks, and since it is manual operation, the operator is exposed to radiation during the dispensing process. It was inevitable.

Therefore, this embodiment shows a radiochemical liquid dispensing device that automatically dispenses IR to minimize radiation exposure of the operator.

Figures 1 to 4 show an embodiment of the present invention.
In the figure, 11 is a housing, 12 is a container holder that holds an IR container (vial bottle and barrel shield) 13 upside down, 14 is a syringe holder that holds a syringe 16 with a needle 15 facing upward,
17 is a shield made of lead that covers the cylinder part of the syringe 16; 18 is a lead glass provided so that the scale of the syringe can be seen; 19 is a piston 20 of the syringe.
This is a piston end holding part that holds the end of the piston. The back surface of the shield 17 attached to the syringe is covered with an iron plate, and a magnet is embedded in the part of the syringe holding part 14 facing this, so that the syringe can be easily attached and detached. 30 is a pulse motor.

Next, in FIG. 2 showing the back of the device and the internal structure of the container holding part 12, 21 is a rack fixed to the housing 11, and has a groove in the center as described later. 22 is a grooved rail fixed to the housing, 23 is a grooved rack fixed to the panel of the syringe holding part 14, and 24 is a grooved rail fixed to the panel of the syringe holding part 14. . Reference numerals 25a to 25d are rotatable wheels provided on the panel of the syringe holder 14, and are engaged with the grooves of the rack 21 or the grooves of the rail 22. 26a
-26d is a rotatable wheel provided on the panel of the piston end holding portion 19, and is engaged with a groove of the rack 23 or a groove of the rail 24. 27 and 28 are pulse motors, and 29 is a limit switch.

The rack 21, the rail 22, the wheels 25a to 25d, and the pulse motor 27 constitute an elevating mechanism (first elevating mechanism) for the syringe holder 14.
The main part is shown enlarged in FIG. That is, the four rotatable wheels 25a to 25d provided on the panel of the syringe holder 14 are connected to the groove 31a of the rack 21.
is engaged with the groove 31b of the rail 22, and on the other hand,
A pinion 32 connected to a pulse motor 27 fixed to a panel of the syringe holding part 14 via a built-in speed reducer meshes with the teeth of the rack 21, so that the rotation of the pulse motor 27 causes the syringe holding part to rotate. 14 goes up and down. Similarly, Rack 23,
The rail 24, the grooves 26a to 26d, and the pulse motor 28 constitute an elevating mechanism (second elevating mechanism) for the piston end holder 19 relative to the syringe holder 14. The elevating mechanism having the above structure is characterized in that it moves smoothly and generates very little noise compared to a mechanism that uses a worm gear or the like.

Furthermore, in FIG. 2, 35 is a container holding plate;
6 is a moving plate, 37 is a needle position detection sensor section, 38,
39 is a pulse motor fixed to the top plate 40 of the casing for moving the moving plate 36.

The needle 15 attached to the syringe does not always align with the axis of the syringe. Therefore, if the needle tip is attached with the needle tip deviated from the axis, the syringe will be deviated from the mouth of the container 13 even if the syringe is raised as it is. Therefore, it is necessary to detect the position of the needle tip and move the container to match it.

FIG. 4 shows the moving mechanism. The housing top plate 40 includes arms 41a, 41b, 41c.
are rotatably provided, and their rotation axes are connected to pulse motors 38, 39 shown in FIG. 2 and pulse motor 30 shown in FIG. 1, respectively. The arms 41a, 41b, 41c are provided with rotatable wheels 42a, 42b, 42c, respectively, and these wheels connect the long holes 43a, 43 formed in the movable plate 36.
b, 43c (see Figure 1). Moving board 3
6 indicates rollers 4a, 44b, 4 arranged on the top plate 40.
4c and is biased in the direction of arrow P by a spring or the like (not shown), and the limit switch 45
The initial position is set by a, 45b, and 45c. When aligning the tip of the injection needle 15 with the mouth of the container, the arm 41 is driven by the pulse motor 30.
c is rotated to move the movable plate 36 by a predetermined amount in the
6 by a predetermined amount in the Y direction.

Next, the operation of this embodiment will be explained. First, IR
The container 13 containing the syringe is placed upside down on the holding plate 35, and then the syringe holding part 14 with the syringe set therein.
is raised by the first lifting mechanism. When the needle tip reaches the upper chain line A shown in the needle position detection sensor section 37 in FIG. 2, the syringe holding section 14 temporarily stops. Therefore, the needle position is detected by a sensor disposed at the level of the lower chain line B shown in the needle position detection sensor section 37, and the pulse motors 30, 3 are correspondingly detected.
8 and 39 are operated, and the position of the moving plate 36 is adjusted. After the needle position coincides with the position of the opening of the container, the syringe holder 14 is raised again by the first elevating mechanism, and the needle is inserted into the opening of the container. Then, the second elevating mechanism is activated, and the piston end holder 19 that holds the end of the piston of the syringe is lowered to dispense the required amount of IR into the syringe. In the state of
The elevating mechanism is activated to lower the syringe holder 14, and the needle is removed from the mouth of the container. The above operations are executed under the control of a pre-programmed control section (not shown). After that, the operator can remove the syringe 16 with the seal 17 attached from the syringe holder 14 and inject it into the patient.

In this embodiment configured as described above, by employing a two-stage elevating mechanism, IR dispensing is performed automatically and with high precision, and the chances of radiation exposure to the operator are greatly reduced. It turns out.

(Effects of the invention) As explained above, according to the invention, since the rotatable wheel provided on the object to be lifted and lowered is engaged with each groove of the rack and rail, the object to be lifted and lowered does not shake.
The meshing of the pinion connected to the motor with the teeth of the rack allows for smooth and highly accurate vertical movement, and has the advantage of extremely low noise.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the front and top surfaces of one embodiment of the present invention, FIG. 2 is a view showing the back surface and the internal structure of the container holder, and FIG. 3 is a perspective view showing the elevating mechanism. , FIG. 4 is a diagram showing an X-Y moving mechanism of the container holding section, and FIG. 5 is a diagram showing a conventional dispensing method. 12... Container holding part, 13... Container, 14...
Syringe holding part, 15... Needle, 16... Syringe, 1
9... Piston end holding part, 21, 23... Rack, 22, 23... Rail, 25a to 25d, 2
6a to 26d...Car, 27, 28...Pulse motor, 31a, 31b...Groove, 32...Pinion.

Claims (1)

[Scope of utility model registration request] A rack having a linear groove in the center and having teeth carved on both sides thereof; a rail disposed opposite to the rack at a constant interval and having a linear groove in the center;
A total of four wheels, which are rotatably supported at the four corners of a rectangle on the object to be lifted and lowered, two wheels engaged with the grooves of the rack and two wheels engaged with the grooves of the rail;
A lifting device comprising a motor fixed to the object to be lifted and lowered and having a pinion meshing with teeth of the rack, and the object to be lifted and lowered moves up and down by rotation of the motor.