JPH0628121Y2 - Powder feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a powder supply device for automatically opening a bag in which powder is enclosed.

[Conventional technology]

Conventionally, a bicarbonate dialysis solution used for a patient with renal failure in a hospital or the like is prepared by quantitatively mixing three kinds of agents A, B and water. This B agent is generally used in powder form, and in hospitals, the packaging bag containing the B agent is manually opened, and the B agent taken out is dissolved in the water.

[Problems to be solved by the device]

However, in order to dialyze a large number of patients, many packaging bags of the agent B have to be opened, and the above-mentioned manual opening is very complicated and there is a possibility that bacteria may be mixed.

An object of the present invention is to provide a powder supply device capable of automating the opening operation of a bag in which powder is enclosed, eliminating the need for manpower for opening, and preventing contamination by bacteria. It is in.

[Means for Solving the Problems]

According to a first aspect of the present invention, an endless conveyor belt that is erected in a ring shape, a plurality of attachment portions that are provided on the conveyor belt and can each hold a packaging bag containing powder, and the conveyor belt in a predetermined direction. Powder supply device provided with traveling drive means for traveling, and an opening means which is provided at a predetermined position on the traveling path of the conveyor belt and which can cut and open the surface of the packaging bag transferred in the conveyor belt. Is the gist.

A second invention is a pair of endless conveying belts which are annularly laid in parallel to each other, and a plurality of endless conveying belts which are respectively provided in the conveying belts and which can hold both ends of a packaging bag containing powder. A mounting portion, traveling drive means for traveling the both transport belts in a predetermined direction, and cutting the lower surface of the packaging bag provided on the lower side of the traveling route of the both transport belts and transported by the both transport belts. The gist of the present invention is a powder supply device provided with an opening means capable of opening.

[Action]

In the first invention, the packaging bag is held at each mounting portion of the transport belt, and when the transport drive means travels the transport belt in a predetermined direction, the packaging bags are sequentially transferred to the opening means and opened. . Thus, the opening of the packet is automatically performed.

Further, in the second invention, both end portions of the packaging bag are respectively held by the mounting portions of the two transport belts, and the packaging bag is bent downward at its central portion by its own weight and a tensile force is applied to the lower surface side. Then, when the transport belt travels in the predetermined direction by the travel drive means, each packaging bag is sequentially transferred to the opening means and the lower surface is cut. At this time, since the pulling force is applied to the lower surface side of the packaging bag, the cut portion is largely opened and the powder is easily discharged.

〔Example〕

An embodiment in which the present invention is embodied in a powder supply device provided in a preparation device for preparing dialysate will be described with reference to the drawings.

The powder supply device 1 of the present embodiment is configured to open and weigh a packaging bag X in which a powdery agent B is sealed, and sequentially supply the agent B to the adjacent preparation devices 2. Hereinafter, the structure of the powder supplying apparatus 1 will be described. As shown in FIGS. 2 to 4, bearings 4 are installed in front and rear of the four corners of the frame 3 of the powder supplying apparatus 1, respectively. The front and rear sprockets 5 and 6 are rotatably supported. Endless carrier chains 7 and 8 are erected in a square shape between the front and rear sprockets 5 and 6, and both carrier chains 7 and 8 are drive chains 9 installed in the lower stage of the frame 3.
Chain drive motor 1 via drive sprocket 10 and
It is connected to 1.

As shown in FIGS. 1 and 5, tongues 12 are provided at 21 equally divided portions on both of the carrier chains 7 and 8, and each tongue 12 has a pin 13 as a mounting portion. It is provided so as to project toward the side transport chains 7 and 8. Clips 14 holding both ends of the packaging bag X can be hooked between the pins 13 facing each other. Then, as will be described later, the transport chains 7 and 8 are the chain drive motor 1
Driven by 1, the distance between the adjacent pins 13 is set as one stroke, and the pins 13 travel in a counterclockwise manner.

An index sensor 15 is installed above the upper stretched portion of the transport chains 7 and 8, and the tongue piece 12 on the transport chain 7 side is sequentially detected by the index sensor 15 as it travels. There is. Hereinafter, for convenience of description, the position of the index sensor 15 will be referred to as a detection position a, and the position one stroke forward in the transport direction of the detection position a will be referred to as an opening position b. An empty bag detection sensor 16 is supported by a support member (not shown) below the upper stretched portions of the transport chains 7 and 8, and the empty bag detection sensor 16 detects the unopened envelope X located at the detection position a. It is supposed to do. Also, as shown in FIG.
The above-mentioned packaging bag X is hooked on the pin 13 from the right side of the powder supply device 1, and a total of eight packaging bags X can be hooked downward from the detection position a at a time. .

As shown in FIGS. 2 and 3, a drug feeder 17 is installed in the middle of the frame 3, and a feeder 18 having an inlet 18a extending to the preparation device 2 side is provided above the feeder 17. ing. Then, as will be described later, the medicine feeding device 17 vibrates the feeder 18 to discharge the internal B agent from the charging port 18a. A support plate 19 is erected on the upper side of the medicine feeding device 17, and a fixed hopper 20 is attached to the support plate 19.
The lower part of the fixed hopper 20 corresponds to the opening of the feeder 18, and the upper part of the fixed hopper 20 is located between the upper stretched parts of the two conveyor chains 7, 8.

As shown in FIGS. 1 and 5, a base end of a rotary arm 21 is pivotally attached to the support plate 19 by a rotary shaft 22, and the rotary arm 21 has an arm drive motor 23 (shown in FIG. 6). ), Reciprocating rotation is possible between two positions, a lower limit position tilted to the right shown by the solid line and an upright upper limit position shown by the phantom line. The lower limit position of the rotating arm 21 is detected by the lower limit detection sensor 24, and the upper limit position is detected by the upper limit detection sensor 25. Further, a rotary blade drive motor 26 is attached to the tip of the rotary arm 21, and the output shaft 26a of the drive motor 26 is rotated so as to be positioned in the middle of the upper stretched portions of both the transport chains 7 and 8. Blade 2
7 and one end of the string 28 are attached.

As shown in FIGS. 2 and 3, a weighing device 29 is installed below the drug feeding device 17, and the weighing device 29 measures the weight of the B agent fed into the feeder 18 of the drug feeding device 17. It is designed to measure. Also, the weighing device 29
A control box 30 is suspended and supported on the lower side.

In addition, on one side of the upper part of the frame 3, the transfer chains 7 and 8 are
Replenishment switch 3 that is operated when refilling the packaging bag X of the agent
1 is provided, and a dose setting switch 32 for the agent B to be discharged to the preparation device 2 side is provided.

On the other hand, to explain the preparation device 2 side, the powder supply device 1
The frame 33 of the preparation apparatus 2 adjacent to is roughly divided into an upper stage, a middle stage, and a lower stage. A dilution water tank 34 is installed in the upper stage, a mixing tank 35 is installed in the middle stage, and a storage tank 36 is installed in the lower stage. The dilution water tank 34 is adapted to degas the tap water introduced therein and heat it up to about body temperature to produce dilution water, and the dilution water is introduced into the mixing tank 35. ing. In addition, in the mixing tank 35, the input port 18a of the feeder 18 is provided.
The agent B is supplied from the same, and the agent A stock solution is supplied from an A stock solution storage tank (not shown).

The above-mentioned agents A, B and dilution water are mixed in the mixing tank 3
Prepared as a dialysate by mixing in a prescribed ratio in 5
The dialysate is temporarily stored in the storage tank 36 and then sequentially supplied to the patient. As described above, the preparation device 2 includes the dilution water tank 34 that requires an installation space,
Since the mixing tank 35 and the storage tank 36 are arranged vertically in the frame 33, the entire apparatus is made compact. A control box 37 for controlling the operation of the preparation apparatus 2 is installed in the frame 33, and the control box 37 supplies a supply command to the powder supply apparatus 1 side when the preparation apparatus 2 is performing dialysis treatment. It is designed to output a signal.

Next, the electrical configuration of the powder supplying apparatus 1 of the present embodiment will be described. As shown in FIG. 6, a central processing unit 38 (hereinafter, referred to as CPU) is installed in the control box 30, and The index sensor 1 is provided on the input side of the CPU 38.
5, an empty bag detection sensor 16, a lower limit detection sensor 24, an upper limit detection sensor 25, a weighing device 29, and a supply switch 31 are connected. The input side of the CPU 38 is connected to the control box 37 on the side of the preparation device 2 so that the supply command signal output by the control box 37 is input.

On the output side of the CPU 38, the chain drive motor 11,
The arm drive motor 23 and the rotary blade drive motor 26 are connected via drive circuits 42 to 44, and the medicine injection device 17 and the injection amount setting switch 32 are connected. Similarly, an alarm buzzer 39 is connected to the output side of the CPU 38.

Further, the CPU 38 has a read-only memory 40 (hereinafter, R
OM) and a random access memory 41 (hereinafter referred to as RAM) are connected, and various programs for controlling the operation of the powder supply device 1 are stored in the ROM 40, and the CPU 38 performs processing in accordance with these programs. It has become. The RAM 41 is the CPU 3
The data of the process performed by 8 is temporarily stored.

Then, the CPU 38 instinctively feeds the transport chains 7 and 8 by one stroke by the chain drive motor 11, rotates the rotary blade 27 by the rotary blade drive motor 26, and opens the packaging bag X at the opening position b. Agent injection device 1
7 into the feeder 18.

Further, the CPU 38 determines the weight of the B agent in the feeder 18 based on the detection data of the weighing device 29, vibrates the feeder 18 in the medicine feeding device 17, and causes the feeding port 18a.
Then, a predetermined amount of the agent B is charged into the mixing tank 35.

Next, the CPU 38 of the powder supply device 1 configured as described above
The operation of the process will be described with reference to the flowchart of FIG.

First, the situation of the powder supplying apparatus 1 before the start of operation will be described. As shown by the solid line in FIG. 1, the rotating arm 21 is switched to the lower limit position and the rotary blade 27 is stopped.
Further, it is assumed that the transport chains 7 and 8 are stopped, the packaging bag X is hooked on a part of the pin 13 thereof, and the leading packaging bag X is at the opening position b. At this time, since both ends of each packaging bag X are supported by the pins 13, the central portion thereof is bent downward by its own weight and a tensile force is applied to the lower surface side.

When the preparation device 2 is in operation, the CPU 38 executes step 1
It is determined whether or not the supply command signal is input from the preparation device 2 side, and immediately after the supply command signal is input, the process proceeds to step 2 to replenish the transport chains 7 and 8 with the packaging bag X. If it is not immediately after replenishment, the process proceeds to step 3. In step 3, the weighing device 29
It is determined whether or not the weight of the agent B in the feeder 18 measured in step 4 is equal to or more than a predetermined value. Thus, the normal CPU
38 repeats the processing of steps 1 to 3
Monitor the remaining amount of B agent in 8.

When the weight of the agent B in the feeder 18 becomes less than the predetermined value in step 3, the rotary blade drive motor 26 rotates the rotary blade 27 and the arm drive motor 23 sets the upper limit of the rotary arm 21 in step 4. Move to position. Therefore, the lower surface of the packaging bag X at the opening position b has the rotary blade 2
It is cut at 7 and hit at the tip of the string 28,
All of the B agent inside is discharged downward and fixed hopper 20
It is thrown into the feeder 18 from. As described above, since the central portion of the packaging bag X is bent downward by its own weight and the tensile force is applied to the lower surface side, the cut portion is largely opened at the time of opening, and the agent B is easily discharged. .

Then, when the rotating arm 21 that has moved to the upper limit position is detected by the upper limit detecting sensor 25 in step 5, the arm drive motor 23 is reversed in step 6 to rotate the rotating arm 21.
To the lower limit position. After that, when the lower limit detection sensor 24 detects the rotating arm 21 in step 7, the rotating arm 21 and the rotary blade 27 are stopped in step 8.

Next, in step 9, the transport chains 7 and 8 are run by the chain drive motor 11, and when the index sensor 15 detects the next tongue piece 12 again, the transport chains 7 and 8 are stopped. Therefore, the transport chains 7 and 8 are fed by one stroke, and the CPU 38 determines in step 10 whether or not the empty bag detection sensor 16 detects the package bag X at the detection position a. Return to step 1 above.

As described above, when the remaining amount of the B agent in the feeder 18 is small in step 3, the processes up to steps 4 to 10 are performed. As a result, the packaging bag X at the opening position b is opened and the B agent is replenished in the feeder 18, and then the opening position b is opened.
A new packaging bag X is moved to. Then, the CPU 38 vibrates the feeder 18, and the B agent inside is fed into the mixing tank 35 from the feeding port 18a to be used for the preparation of dialysate.

When the empty bag detection sensor 16 does not detect the packaging bag X at the opening position b in step 10, that is, when the packaging bag X itself does not exist at the opening position b or the packaging bag X is empty. In step 11, the alarm buzzer 39 is activated to notify the operator that the packaging bag X hooked on the transport chains 7 and 8 has been used up. In this case, since the operator stops the preparation device 2, the CPU 38 proceeds to step 12 assuming that the supply command signal is not input from the preparation device 2 side in step 1.

Then, the operator moves each pin 13 downward from the detection position a.
Instead of the empty packaging bag X, a total of eight new packaging bags X are hooked, and when the supply switch 31 is operated in step 12,
Since the packaging bag X at the detection position a is detected by the empty bag detection sensor 16 in step 13, the process proceeds to step 14. Further, in step 14, the transport chains 7 and 8 are sent by one stroke and counted up in step 15, and in step 16, since the transport chains 7 and 8 have not completed one round, the process returns to step 13. In this way, the empty bag detection sensor 16
The processes of steps 13 to 16 are repeated until the packaging bag X is no longer detected, and the transport chains 7 and 8 are sequentially sent and counted up, and then the worker again receives a new packaging bag X on each pin 13. Be hung up.

Then, the transport chains 7 and 8 make one round and all the pins 13
When the packaging bag X is hooked, the CPU 38 returns from step 16 to step 1. After that, when the preparation device 2 is restarted and a supply command signal is input to the powder supply device 1 side, CP
U38 shifts from step 1 to step 2 and in this step 2 it is immediately after the refilling of the packaging bag X.
Move to. Since it is counted up to "21" which is equal to the number of the packaging bags X hooked in this step 17, the conveyance chains 7 and 8 are not fed and the process proceeds to step 3 to open the above-mentioned agent B again. Execute the supply process.

On the other hand, when the dialysis of the day is completed without using all the packaging bags X hooked on the pins 13 of the transport chains 7 and 8, the worker replenishes the packaging bags X before starting the dialysis the next day.
Therefore, the process shifts from step 1 to step 12, and the process from step 12 to 16 is repeated until all the pins 1
3 wraps the packaging bag X, and at the same time, newly wraps the packaging bag X.
, For example, "17" is counted up. Then, when the preparation device 2 is started, the process shifts from step 1 to step 2, and since it is immediately after the replenishment, the process proceeds to step 3 until the count reaches "21".
Send 8. Since the count is incremented to "17" as described above, the transport chains 7 and 8 are fed by four strokes, and as a result, the leading end of the old packaging bag X used the previous day moves to the open position b. Therefore, when dialysis is started, the old packaging bag X is used first, and then the new packaging bag X is used.

As described above, in the powder supply device of the present embodiment, since the packaging bag X in which the agent B is enclosed is sequentially conveyed to the opening position b and is automatically opened by the rotary blade 27, it is possible to perform each operation without manpower. Not only can the opening operation of the packaging bag X be performed, but also contamination of various bacteria can be prevented.

Also, the transport of the packaging bag X to the opening position b is performed by the transport chains 7, 8
Since the packaging bag X is carried out in advance, it is possible to surely move the packaging bag X to the respective pin 13 of the transport chains 7 and 8 in advance and to move it to the unsealing position b for unsealing.

Furthermore, since the transport chains 7 and 8 are installed in a square shape,
The space required for installing the transport chains 7 and 8 can be minimized and the powder feeder 1 can be downsized.

On the other hand, as described above, when the dialysis is stopped while the unused packaging bag X is left in a part of the transport chains 7 and 8, and a new packaging bag X is replenished the next day to restart the dialysis, Old bag X
Since the old packaging bag X is opened from the old packaging bag X, it can be used for dialysis before the old packaging bag X solidifies and becomes unusable.

The present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the chains 7 and 8 are used as the conveyor belts, but instead of this, an endless belt is used at predetermined intervals. A large number of pins 13 may be provided.

Further, in the above embodiment, the pair of transport chains 7 and 8 are provided side by side and the packaging bag X is hooked between them, but for example, the packaging bag X may be hooked on one transport chain for transport.

Further, in the above embodiment, 21 pins 13 are provided on the carrier chains 7 and 8 that are erected in a square shape. However, for example, the carrier chains 7 and 8 are erected in a substantially circular shape, or the number of pins 13 is changed. Alternatively, instead of the pin 13, the packaging bag X may be hooked with a hook or the like.

Further, in the above-described embodiment, the transport chains 7 and 8 are sent one stroke at a time by repeating running and stopping, but the transport chains 7 and 8 may be sent at an extremely slow constant speed without being stopped. .

On the other hand, although the packaging bag X is opened by the rotary blade 27 in the above embodiment, it may be opened by a fixed blade instead.

[Effect of device]

As described in detail above, according to the powder supply device of the present invention, the opening operation of the packaging bag containing the powder is automated, the manpower for opening the bag is not required, and the contamination of bacteria is prevented in advance. It has the excellent effect of being able to.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing the relationship between a conveyor chain and a rotary blade in the powder supply device of the embodiment, FIG. 2 is a side view of the powder supply device and the preparation device, and FIG. 3 is a powder supply device. A front view, FIG. 4 is an explanatory view showing an outline of a carrier chain, and FIG. 5 is a partial side sectional view showing a relationship between the carrier chain and a rotary blade,
FIG. 6 is a block diagram showing the electrical configuration of the powder supply device,
FIG. 7 is a flow chart for explaining the operation. Reference numerals 7 and 8 are a transport chain as a transport band, 11 is a chain drive motor as a traveling drive means, 13 is a pin as an attachment portion, 27 is a rotary blade as an opening means, and X is a packaging bag.

Claims (2)

[Scope of utility model registration request] 1. An endless carrier belt (7,
8), a plurality of mounting portions (13) provided on the transfer belts (7, 8) and capable of holding the packaging bag (X) in which the powder is sealed, and the transfer belts (7, 8) are predetermined. A traveling drive means (11) for traveling in a predetermined direction, and a packaging bag (X) which is provided at a predetermined position on the traveling route of the conveyor belts (7, 8) and is transferred in the conveyor belts (7, 8). A powder supply device comprising: an opening means (27) capable of cutting and opening the surface. 2. A pair of endless transfer belts (7, 8) laid in an annular shape so as to be parallel to each other, and a package provided with each of the transfer belts (7, 8) and containing powder. A plurality of mounting parts (13) capable of holding both ends of the bag (X), a traveling drive means (11) for traveling the both transfer belts (7, 8) in a predetermined direction, and the both transfer belts (7, 8). It is provided below the travel route of 8),
A powder supply device, comprising: an opening means (27) capable of cutting and opening the lower surface of the packaging bag (X) transferred by both transfer zones (7, 8).