JP5276841B2 - Drug supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medicine feeder capable of preventing a device such as a supply motor from being damaged. <P>SOLUTION: The medicine feeder includes a locking rotation claw that is connected to the motor shaft side of a supply motor, and a locked rotation claw that is locked by the locking rotation claw and thereby rotated in synchronization with the locking rotation claw in order to operate a supply section for medicines. The locking rotation claw and the locked rotation claw are brought into contact with each other or separated from each other via a moving device, thereby connecting and disconnecting a driving force from the locking rotation claw to/from the locked rotation claw. The locking rotation claw and the locked rotation claw have relative shapes of recessed parts and projecting parts so that the recessed parts and the projecting parts fit to each other. Power is transmitted to the locked rotation claw by the rotation of the locking rotation claw, thereby supplying the medicines to a specific place. In this feeder, the moving device is provided with an elastically absorbing mechanism configured so that if projecting parts of the locking and locked rotation claws come into contact with each other as a result of relatively moving the locking and locked rotation claws in a direction in which the recessed parts and projecting parts of the locking and locked rotation claws fit to each other, a pressing force acting on the projecting parts is elastically absorbed. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a medicine supply device such as a liquid medicine supply device.

  Conventionally, in a medical institution such as a hospital or a pharmacy, a liquid medicine supply device has been used in which liquid medicine filled in a liquid medicine supply bottle is supplied from the liquid medicine supply bottle to a liquid medicine bottle provided to a patient. (For example, see Patent Document 1 below).

This type of liquid medicine supply apparatus has a supply pump for sucking liquid medicine filled in a liquid medicine supply bottle into a supply pipe, and a pump drive unit for driving the supply pump. The pump drive unit has a supply motor, and a locking rotary claw that is locked to a locked rotary claw attached to the supply pump is fixed to the motor shaft of the supply motor.
Then, one end of the supply pipe is inserted into the liquid medicine supply bottle, the middle part of the liquid medicine supply pipe is attached to the supply pump, and the supply motor is attached so that the locking rotary claw is locked to the locked rotary claw. The locking rotary claw and the locked rotary claw are moved so that the supply pump is operated by driving the pump driving unit to supply the liquid medicine to the liquid medicine bottle.

JP 2003-325639 A

In the liquid medicine supply device, the supply pump is driven by locking the locking rotary claw and the locked rotary claw, but the locking rotary claw and the locked rotary claw are always smoothly engaged. It does not necessarily stop. For example, in the case where the locking rotary claw and the locked rotary claw are composed of a key and a key groove and the driving force is transmitted from the supply motor to the supply pump by their fitting, the rotation is transmitted when the keys hit each other. However, if the locking rotating claw and the locked rotating claw are chrysanthemum, the rotation is not transmitted when the gears hit each other. In addition, since the force is applied to the supply motor in the direction in which it is moved with the keys or gears in contact with each other, the supply motor and the device for moving it are overloaded. There is concern that it will be damaged.
Such a problem is not limited to the liquid medicine supply device, but the medicine supply part is rotated by moving the supply motor to lock the locking rotary claws and the locked rotary claws. The drug delivery device was common.

  Then, this invention makes it a subject to provide the chemical | medical agent supply apparatus which can suppress damage to apparatuses, such as a supply motor, in view of the said subject.

The present invention operates a medicine supply unit by rotating to interlock with the locking rotation claw by engaging with the locking rotation claw and the locking rotation claw connected to the motor shaft side of the supply motor. A locking rotary claw is provided, and the locking rotary claw and the locked rotary claw are moved closer to and away from each other by a moving device to connect the driving force from the locking rotary claw to the locked rotary claw. The locking rotating claw and the locked rotating claw have a concavo-convex portion having a relative shape with each other, the concavo-convex portions are fitted to each other, and the locked rotating claw is rotated by the rotation of the locking rotating claw. A drug supply device that transmits a driving force and supplies a drug toward a predetermined place, wherein the rotation claw is locked in the fitting direction of the concave and convex portions of the locking rotation claw and the locked rotation claw When the protrusions of the locking rotary claw and the locked rotating claw are brought into contact with each other by relatively moving the locked rotating claw, Elastic absorbing mechanism for absorbing resiliently pressing force acting on the convex portion each other is provided in the mobile device, the convex portions each other in the locking rotation pawl and the engaged rotation pawl driven by the mobile device abuts, engages The stop rotating claw and the locked rotating claw are relatively separated from each other, and the supply motor is driven so that the convex portions are displaced from each other.

In the above configuration, when the locking rotary claw and the locked rotary claw are relatively close to each other and the projections come into contact with each other by driving the moving device, the locking rotary claw and the locked rotary claw are engaged by the elastic absorption mechanism. Since the pressing force between the convex portions corresponding to the state in which the stationary rotation claw is relatively approaching is absorbed, the load acting on the supply motor and the moving device is absorbed accordingly.
Further, when the protrusions of the locking rotary claw and the locked rotating claw are brought into contact with each other by driving the moving device, the locking rotary claw and the locked rotating claw are relatively separated from each other, and the convex parts are displaced from each other. Then, the supply motor is driven. Therefore, when the locking rotary claw and the locked rotary claw are brought close to each other by driving the moving device again, the state where the convex portions come into contact with each other is avoided, and the concave and convex portions are smoothly connected (connected). )

In the medicine supply device of the present invention, an unconnected detection unit that detects that the protrusions of the locking rotating claw and the locked rotating claw are in contact with each other by driving of the moving device is provided, and detection from the unconnected detection unit A separation detecting unit that detects that the projections of the locking rotating claw and the locked rotating claw are separated by a predetermined distance due to the relative separation of the locking rotating claw and the locked rotating claw according to the signal. And the supply motor is driven so that the convex portions are displaced from each other by the detection signal from the separation detection unit .

In the above configuration, when the projections of the locking rotating claw and the locked rotating claw come into contact with each other, the non-connection detecting unit detects this, and the locking rotating claw and the locked engagement are detected according to a detection signal from the non-linking detection unit. When the separation detection unit detects that the projections of the locking rotation claw and the locked rotation claw are separated by a predetermined distance due to the relative separation of the locking rotation claw, the detection signal from the separation detection unit The supply motor is driven so that the parts are displaced from each other. Therefore, when the locking rotary claw and the locked rotary claw are brought close to each other by driving the moving device again, the state where the convex portions come into contact with each other is avoided, and the concave and convex portions are smoothly connected (connected). )

In medicine supply apparatus of the present invention, the mobile device moves the rotating motor, a pressing body that runs according to the driving of the movement motor, and the pressing body is pressed by the operation of pressing pressure body, for supplying A reciprocating movable table on which a motor is fixed, and a pressing force which is interposed between the pressed body and the moving table and works between the convex portions by moving the pressed body while elastically supporting the pressed body. It is characterized in that it comprises an elastic body to absorb.

In the above construction, when driving the moving motor of the moving device, the pressing body is the behavior to be pressed body pressing-released in accordance with the rotation of the movement motor, close the locking rotation pawl in the engaged rotation pawl The moving base moves reciprocally with respect to the support base.

In the medicine supply device of the present invention, the pressing body revolves in a horizontal plane around the motor shaft of the moving motor to press the pressed body .

In the above configuration, when the moving motor of the moving device is driven, the pressing body revolves around the motor axis in the horizontal plane along with the rotation of the moving motor to press and release the pressed body, The moving table reciprocates with respect to the supporting table so as to approach the locked rotating claw.

In the medicine supply device of the present invention, the supply unit operates with the supply pipe in accordance with the rotation of the locked rotating claw, so that the liquid medicine as the medicine is supplied from the liquid medicine supply bottle to the patient. A supply pump for supplying to a bottle, a plurality of the supply pumps arranged side by side on the same circumference around an axis in the vertical direction, a supply motor being arranged radially inward of the supply pump, And the locking rotation claw can be connected and disconnected by moving the supply motor inward and outward in the radial direction between the supply pumps by a moving device. The supply motor and the supply pump are connected to the vertical axis. It is characterized by being relatively rotatable around the center.

In the above configuration, by moving the supply motor inward and outward in the radial direction between the supply pumps, the supply pump is driven and the liquid medicine supply bottle is driven when the engagement rotation claw is fitted to the engagement rotation claw and rotates. The liquid medicine filled in is sucked into the supply pipe and supplied to the liquid medicine bottle. By selecting one of a plurality of supply pumps and rotating the supply motor and the supply pump relative to each other around the axis in the vertical direction according to the selection, the locking rotary claw and the locked rotary claw are sequentially engaged. And disconnect.

In the medicine supply device of the present invention, the locking rotary claw and the locked rotary claw are each formed of concave and convex teeth having a triangular cross section formed radially on the opposite surface around the motor shaft of the supply motor. It is characterized by that.
  According to the above configuration, when the locking rotary claw and the locked rotary claw are moved relatively in the axial direction, the concave and convex teeth come to mesh with each other on the opposing surface, so that the concave and convex teeth are smooth. When the gears are engaged with each other, the driving force of the supply motor is reliably transmitted from the locking rotary claw to the locked rotary claw.

  According to the medicine supply device of the present invention, when the locking rotary claw and the locked rotary claw are relatively approached by the driving of the moving device and the convex portions come into contact with each other, the elastic absorbing mechanism Since the contact force between the projections corresponding to the state in which the stationary rotating claw and the locked rotating claw are relatively close to each other is absorbed, the load acting on the supply motor and the moving device is absorbed accordingly. As a result, the supply motor and the moving device can be effectively prevented from being damaged.

Hereinafter, the medicine supply device of the present invention will be described with reference to the drawings by illustrating a liquid medicine supply device. 1 to 3 are overall configuration diagrams of the liquid medicine supply device 1, FIG. 1 is a front view, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 (side cross-sectional view), and FIG. It is a sectional view taken along line B (plan sectional view).
As shown in these drawings, the liquid medicine supply device 1 is configured to supply a liquid medicine 2 prescribed to a patient from a liquid medicine supply bottle (hereinafter simply referred to as “supply bottle”) 3 to a liquid medicine supply pipe. (Hereinafter simply referred to as “supply pipe”) 29 and is discharged and supplied to the liquid medicine bottle 4 via a liquid medicine supply nozzle (hereinafter simply referred to as “supply nozzle”) 22.

  The liquid medicine supply device 1 has a main body 6 constituting an outer frame. The main body 6 has a top plate (top wall) 7, a suspension plate 51 disposed below the top plate 7, a bottom plate 8, and a center. It has left and right side plates 11, 11 with the part largely open, a back plate 12, and a front plate member 13 with the center part widely open.

The liquid medicine supply device 1 has the rotation drive unit 17 on the suspension plate 51 side of the main body 6, and the nozzle mounting plate 53 is suspended in the main body 6 via the rotation drive unit 17 on the suspension plate 51 side. Yes. The nozzle mounting plate 53 is configured to be intermittently rotatable around the vertical axis 16.
The nozzle mounting plate 53 can be mounted with a plurality of supply nozzles 22 on the same circumference of the outer peripheral portion, and is formed in a flat plate that is annular in plan view. The nozzle mounting plate 53 is provided with a plurality of supply pumps 18 on the upper surface thereof. The supply pumps 18 are arranged on the nozzle mounting plate 53 at predetermined intervals in the circumferential direction. In this embodiment, ten supply pumps 18 are arranged on the nozzle mounting plate 53 at equal intervals in the circumferential direction.
The supply nozzle 22 is attached to the nozzle attachment plate 53 via the attachment means 23 with a predetermined inclination angle with respect to the vertical axis 16.

  The rotation drive unit 17 is supported by a rotation motor 28 mounted on the upper surface of the suspension plate 51, and is supported on the lower surface of the top plate 7 so as to be rotatable about the vertical axis 16 so as to be horizontally centered in the vertical direction of the inner peripheral surface. A rotary ring 31 having an annular protrusion 30 formed, an annular thin gear plate 32 fixed to the lower surface of the rotary ring 31, and a gear plate 32 attached to the drive shaft of the rotation motor 28. A drive gear (not shown) that meshes with teeth 33 formed on the outer periphery of the top plate 7 and a lower surface of the top plate 7 are attached to the lower surface of the top plate 7 so as to be freely rotatable in each case around a single vertical axis, and the protrusion 30 is attached to the outer peripheral surface. And a plurality of support rollers 35 having recesses 34 fitted to the. Each supply pump 18 is configured to be driven for each supply pump 18 in conjunction with the intermittent drive of the rotation drive unit 17 (rotation motor 28).

A mounting body 5 for mounting a plurality of supply bottles 3 is disposed below the nozzle mounting plate 53. The mounting body 5 is formed in an annular flat plate in plan view, and is configured to be intermittently rotatable around the vertical axis 16 in accordance with the rotation operation of the nozzle mounting plate 53. The supply bottles 3 can be arranged at equal intervals on the same circumference of the outer peripheral portion. In this embodiment, the supply bottles 3 are configured so that ten supply pumps 18 can be installed in the same number.
The nozzle mounting plate 53 and the mounting body 5 are parallel to each other, and are configured to be intermittently rotatable around the vertical axis 16 in a horizontal plane.
Furthermore, a supply pipe 29 is provided for each supply bottle 3, one end side of the supply pipe 29 is inserted into the supply bottle 3, a middle portion of the supply pipe 29 is inserted into the supply pump 18, and the other end side of the supply pipe 29. Is attached to the supply nozzle 22.

A mounting table 24 for mounting the liquid medicine bottle 4 is disposed between the front plate members 13 of the main body 6, and an elevating device 25 for moving the mounting table 24 up and down is provided.
The lifting device 25 includes a lifting motor 82 and a belt mechanism that is driven by the driving of the lifting motor 82. The elevating motor 82 is attached to the back surface of the front plate member 13 of the main body 6 so that the drive shaft protrudes forward. A drive pulley 85 is attached to the drive shaft so as to protrude forward in the horizontal direction from the lower portion of the front plate member 13 of the main body 6.

  The elevating device 25 is driven by operating a drive switch (not shown). The elevating device 25 is driven by operating the drive switch, and the supply nozzle attached to the nozzle mounting plate 53 is operated. The mounting table 24 is raised until the liquid medicine 2 can be supplied from 22 to the supply bottle 3.

  The main body 37 of each supply pump 18 is detachably attached to the upper surface of the nozzle attachment plate 53 via an attachment frame 36 by screwing or the like. The supply pump 18 includes a driven gear 41 (corresponding to a locked rotary claw) that meshes with a drive gear 47 described later and interlocks with the drive.

  A pump drive unit 20 for driving the supply pump 18 individually and selectively is provided. The pump drive unit 20 is disposed radially inward of a region surrounded by the attachment frame 36. The pump drive unit 20 includes a supply motor 54 (a stepping motor is used) that is held horizontally, and the drive gear 47 (corresponding to a locking rotary claw) provided at the tip of the drive shaft. Yes.

  The supply pump 18 presses the middle part of the supply pipe 29 and moves the pressed part from the supply bottle 3 side to the liquid medicine bottle 4 side, thereby moving the liquid medicine 2 in the supply bottle 3 to the liquid medicine bottle 4 side. It is configured to move. The supply pump 18 is provided with clamping means composed of a pair of members that are relatively close to and away from each other, and the clamping means presses and deforms the intermediate portion of the supply pipe 29 by bringing the members close to each other. Thus, the supply pipe 29 can be inserted between the members. In other words, the supply pump 18 deforms the supply pipe 29 against its elasticity by the clamping means, thereby moving the negative pressure state in the supply pipe 29 from the supply bottle 3 side to the supply nozzle 22 side for supply. The liquid medicine 2 is sucked into the pipe 29, and the sucked liquid medicine 2 is moved from the supply bottle 3 side to the supply nozzle 22 side.

That is, the supply pump 18 can move up and down by the operation of a lever (not shown) with respect to the main body portion 37 fixed to the nozzle mounting plate 53 side and the main body portion 37, and can maintain the position thereof. And a rotary clamping member 102 provided on the main body 37 side. The clamping means includes a vertical movement member 100 and a rotary clamping member 102.
The vertical movement member 100 has an inverted U-shaped concave portion 101 on its lower surface, and a middle portion of the supply pipe 29 between the rotary clamping member 102 provided on the main body portion 37 side and the concave portion 101 of the vertical movement member 100. Can be sandwiched. The wall surface of the recess 101 has an upper arc surface 103 and a suspended surface 104 depending from both the left and right sides of the arc surface 103.

  The vertical movement member 100 is arranged at the upper portion of the main body 37 near the front side, and the rotary clamping member 102 is arranged at a position facing the concave portion 101 of the vertical movement member 100 in the downward direction. Thus, the vertical movement member 100 and the rotation clamping member 102 are configured to be relatively close to each other in the vertical direction.

The rotary clamping member 102 further includes a drive shaft 105 that rotates as the supply motor 54 is driven, and front and rear rotary disks 106 that are provided on the outer peripheral portion on the distal end side of the drive shaft 105 so as to rotate integrally with the drive shaft 105. And a plurality of (in this case, three) roller-shaped rotary pressing bodies 107 that rotate by contacting the supply pipe 29 and revolve around the drive shaft 105 along with the rotation of the rotating disk 106.
The rotary pressing body 107 is supported so as to be rotatable around a support shaft 108 in the front-rear direction, and the support shaft 108 is supported between the rotary disks 106 in parallel with the drive shaft 105. Is set so as to protrude further outward from the outer peripheral portion of the rotating disk 106.

In the supply pump 18 having such a configuration, the supply pipe 29 is directed from the front to the rear between the vertical movement member 100 and the rotary clamping member 102 by operating the lever to move the vertical movement member 100 upward. After the insertion, the lever is operated again to lower the vertical movement member 100.
By doing so, the supply pipe 29 is sandwiched and pressed between the rotary clamping member 102, in particular, the rotary pressing body 107 and the arc surface 103 of the recess 101, and the supply pipe 29 is deformed so as to be crushed in the radial direction. Is done. Then, by rotating the rotary clamping member 102 around the drive shaft 105 (for example, clockwise in FIG. 5), the deformed portion of the supply pipe 29 moves to the liquid medicine bottle 4 side, and a negative pressure / positive pressure region is provided in the supply pipe 29. Occurs, the liquid medicine 2 in the supply bottle 3 is sucked into the supply pipe 29 and sequentially moves to the liquid medicine bottle 4 side.

  As described above, in order to supply the liquid medicine 2 to the liquid medicine bottle 4, a rotation operation around the axis of the drive shaft 105 is required. The drive shaft 105 rotates along with the rotation of the driven gear 41 around the axis. For this purpose, the driving gear 47 is moved in the horizontal direction by driving a moving device 52 described later, and the driving gear 47 is meshed (fitted) with the driven gear 41 whose distance from the vertical axis 16 is immovable.

Here, the configuration of the moving device 52 will be described. 4, 5, and 8 to 14 are explanatory diagrams mainly illustrating the moving device 52. The moving device 52 is configured to relatively move the driven gear 41 and the drive gear 47 closer to and away from each other in order to reciprocate the pump drive unit 20 radially inward and outward in a horizontal plane. In this case, the drive gear 47 is moved closer to and away from the driven gear 41, and the drive gear 47 is fitted to and detached from (connected to) the driven gear 41.
The moving device 52 is provided on the side of the support base 57, a support base 57 that supports the supply base 54, a support base 57 that supports the mobile base 55 so as to be able to reciprocate in the horizontal direction via a guide mechanism 56. It is pressed by the moving motor 58, the pressing roller 73 as a pressing body that revolves around the motor shaft 60 in the horizontal plane as the moving motor 58 is driven, and the revolving operation of the pressing roller 73 around the motor shaft 60. And a pair of pressed rod-like bodies 74 and 75 as pressed bodies.
A spring body 76 as an elastic body for absorbing the movement of the movable table 55 from a predetermined position by moving one of the pressed rod-like bodies 74 and 75 while elastically supporting it. It is interposed between one of the pressing rods 74 and 75 and the moving table 55.
The shaft center direction of the motor shaft 61 of the supply motor 54 is a horizontal direction, and is the front-rear direction, and the supply motor 54 moves forward in accordance with the operation of moving the moving base 55 forward. The drive gear 47 is fitted to 41.

The support base 57 is fixed to the suspension plate 51 via a fixed plate 77 having a rectangular shape in plan view. The fixing plate 77 is formed so that one side thereof is longer than the diameter of the center hole 78 formed in the suspension plate 51, and the end portion of the fixing plate 77 is placed on the edge of the center hole 78 in the suspension plate 51. In this way, it is detachably provided at the edge by screwing. The support base 57 is provided so as to hang down with respect to the fixed plate 77 via four support columns 80 in the vertical direction, and is arranged in a horizontal plane.
A rectangular opening 90 is formed at the center of the support base 57, and a support plate 94 of the moving motor 58 is provided on the support base 57 above the opening 90 via a leg member 93 shorter than the support pillar 80. Are arranged in parallel to the support base 57.
The support plate 94 is placed on the upper surface of the leg member 93 and is detachably provided on the leg member 93 by being screwed downward from above the plate surface of the support plate 94.

  The moving motor 58 is arranged at the center of the diagonal line of the support plate 94 so that the motor shaft 60 is in the vertical direction. The radial inner position of the region surrounded by the attachment frame 36 of the motor 58 for movement may be the center of the region, but considering that it is preferable to make the stroke in the front-rear direction of the movable table 55 as small as possible. It is preferable to arrange them as forward as possible. Therefore, this configuration is realized by arranging at least the support base 57 as far as possible.

The front end of the motor shaft 60 of the moving motor 58 is inserted through the support plate 94 and penetrates through the center of rotation of the detection disk 95 disposed below the support plate 94 in parallel with the support plate 94. The detected disk 95 can be rotated integrally. The pressure roller 73 that is spaced apart (eccentric) in the radial direction by a predetermined distance from the motor shaft 60 is disposed radially outward of the tip of the motor shaft 60 in the disc 95 to be detected. 73 a is parallel to the axis of the motor shaft 60. The pressing roller 73 is inserted between the pressed rods 74 and 75.
In FIG. 8, an imaginary line K is a locus of the central shaft 73 a of the pressing roller 73 when the motor shaft 60 of the moving motor 58 is rotated once.

The guide mechanism 56 has a plurality of guide rollers 96 supported on the lower surface of the support base 57 so as to be rotatable about the vertical axis. A total of four guide rollers 96 are provided in pairs on the left and right sides. Each guide roller 96 has an annular groove formed on the outer peripheral surface thereof.
The guide mechanism 56 has a linear guided rail 97 that is guided in the front-rear direction while being fitted in the groove of the guide roller 96 by the rotation of the guide roller 96 around the vertical axis. Each guided rail 97 is disposed in the front-rear direction, and is provided as a pair on the upper surface of the moving table 55 so as to be separated from each other on the left and right.
A hanging wall 98 that hangs down in the vertical direction is provided in front of the lower surface of the moving table 55. The upper surface of the supply motor 54 is attached to the lower surface of the moving table 55, and the front surface of the supplying motor 54 is the hanging wall The motor shaft 61 of the supply motor 54 is rotatably inserted through the rear surface of 98.

The pair of pressed saddles 74 and 75 are provided on the upper surface of the movable table 55 so as to be separated from each other in the front-rear direction. One pressed rod-like body 74 (hereinafter referred to as the first pressed body 74) disposed rearward is disposed in the left-right direction orthogonal to the front-rear direction, and the first pressed body 74 is the left-right direction. The left and right end portions are detachably fixed to the upper surface of the movable table 55 via pins 74b.
The other pressed rod-like body 75 (hereinafter referred to as the second pressed body 75) disposed forward is formed longer in the left-right direction than the first pressed body 74, and the left end portion is a pin in the vertical direction. 110 is fixed to the upper surface of the movable table 55 via the 110 so as to be rotatable in a horizontal plane.

As shown in FIG. 8, the first and second pressed bodies 75 and 75 have a separation distance L1 between the front and rear surfaces 74a and 75a of the first and second pressed bodies 74 and 75, respectively. In the parallel state, it is set to be larger than the diameter of the pressing roller 73. That is, as shown in FIG. 8, when the outer peripheral surface of the pressing roller 73 is in contact with the facing surface 74 a of the first pressed body 74, the pressing roller 73 is not on the facing surface 75 a of the second pressed body 75. 9 and 10, when the outer peripheral surface of the pressing roller 73 is in contact with the opposing surface 75 a of the second pressed body 75, the pressing roller 73 is the opposing surface of the first pressed body 74. 74a is non-contact. FIG. 8 shows a state in which the first sensor unit 112 is detecting the detected portion 95 b, which is a case where the outer peripheral surface of the pressing roller 73 is in contact with the opposing surface 74 a of the first pressed body 74. The drive gear 47 is located at the farthest (radial center side) and farthest from the driven gear 41.
Then, when the moving motor 58 is driven and the motor shaft 60 rotates, the pressing roller 73 revolves around the motor shaft 60 and the moving table 55 is moved by a distance corresponding to the eccentric distance between the motor shaft 60 and the pressing roller 73. Move back and forth.

  The spring body 76 is a tension coil spring, and one hook end portion 76a is supported on the upper surface of the moving base 55, and the other hook end portion 76b is locked to the upper surface of the second pressed body 75 on the right end portion 75c side. ing. Note that the side on which the other hook end portion 76b is locked, that is, the upper surface of the right end portion 75c of the second pressed body 75 is set lower than the upper surface of the left side portion by the vertical surface 75d.

  In such a configuration, at the timing when the moving motor 58 has not been driven yet, the pressing roller 73 is in contact with the center position in the left-right direction of the opposing surface of the first pressed body 74, and moves forward of the moving table 55. Prevents movement. Accordingly, when the moving motor 58 is driven and the pressing roller 73 revolves around the motor shaft 60, the pressing roller 73 comes into contact with the opposing surface 75 a of the second pressed body 75 and starts pressing the same. The moving table 55 is urged rearward by the elasticity of the spring body 76.

The to-be-detected disc 95 is formed to have a different diameter at approximately half the circumference, and the different-diameter portions are detected portions 95a and 95b. A first sensor unit 112 serving as a non-connection detection unit for detecting 95b is provided.
The first sensor unit 112 is composed of a light emitting element and a light receiving element that are separated in the vertical direction, and both elements can detect the presence or absence of the detected parts 95a and 95b on the outer peripheral part by rotating the detected disk 95. It is configured as follows.
In other words, the first sensor unit 112 is configured to detect whether or not the drive gear 47 has moved in the front-rear direction by meshing with the driven gear 41 based on the rotation amount of the motor shaft 60 of the moving motor 58.

As shown in FIGS. 4, 5, 13, and 14, whether the driving gear 47 and the driven gear 41 are engaged with each other so that power can be transmitted is detected at the position in the front-rear direction of the moving base 55 with respect to the support base 57. For this purpose, a second sensor unit 113 as an unconnected detection unit is provided separately on the support table 57 and the moving table 55.
The second sensor unit 113 includes a detection unit 113a provided on the support table 57 side and a detected unit 113b provided on the moving table 55 side. The detection unit 113a includes a light-emitting piece including a light-emitting element and a light-receiving piece including a light-receiving element that are separated from each other in the left-right direction, and the detection unit 113b is detected by intervening between the light-emitting piece and the light-receiving piece. This block shields light emission and light reception at the unit.
The second sensor unit 113 detects whether the drive gear 47 and the driven gear 41 are engaged with each other. Even if the first sensor unit 112 detects the meshing state of the drive gear 47 and the driven gear 41 by the second sensor unit 113, the moving base 55 moves relative to the support base 57 until the meshing state is reached. It is possible to detect a state that is not actually meshed.

  Both the drive gear 47 and the driven gear 41 are formed in a disc shape and are formed with support shafts 62 and 63 that protrude on the opposite side to the opposite side. Opposing surfaces of the drive gear 47 and the driven gear 41 are a contact surface and a contact surface, respectively. Since the shape of the abutting surface and the abutted surface is formed in substantially the same shape, the shape of the abutting surface of the drive gear 47 will be described in detail here, and the abutting surface of the abutting surface will be described. Instead of explanation.

  The abutting surfaces are radial in which the circumferential separation distances increase toward the outer side in the radial direction about the axis 66 that is the center of the support shaft 62, and none of the base angles are perpendicular to each other in the circumferential cross section. It is formed from tooth spaces 68 and 69 that are equilateral triangular and continuous in the circumferential direction. In the drive gear 47, the tooth 68 corresponds to a convex and the groove 69 corresponds to a concave.

The height of each tooth 68, that is, the height position of the apex (vertical angle side stripe that is the tip facing the contacted surface) is set to be the same with respect to the apex of the groove 69. In addition, each tooth 68 is inclined such that the height of the top thereof decreases toward the axis, and each groove 69 is inclined so that the height of the top increases toward the axis. Is formed so that its height coincides with the axis 66 which is the center of the drive gear 47. Specifically, the height at the position of the axis 66 of the drive gear 47 at both tops is set to be intermediate between the heights of the tooth grooves 68 and 69 at the radially outer end.
By forming the abutting surface and the abutted surface as described above, the axial lines 66 and 67 of the driven gear 41 and the drive gear 47 are on the same line so that the abutting surface and the abutted surface are opposed to each other. When they are brought into contact with each other, the tooth grooves 68 and 69, that is, the side surfaces of the inclined surfaces of the teeth 68 and 68 are brought into contact with each other in the circumferential direction and in the axial direction with no gap therebetween.

A third sensor unit 114 is provided for detecting whether the motor shaft 61 of the supply motor 54 has rotated by supplying the liquid medicine 2 to the liquid medicine bottle 4 as much as necessary. The third sensor unit 114 includes a detected body 115 that rotates around the motor shaft 61 together with the motor shaft 61, and a sensor 116 that includes a light emitting piece and a light receiving piece that detect the number of rotations of the detected body 115. The light emitting piece includes a light emitting element, the light receiving piece includes a light receiving element, and the light emitting piece and the light receiving piece are arranged apart from each other in the front-rear direction.
The detected object 115 is formed in a thin disk shape, and is provided with unevenness in the radial direction on the outer periphery thereof, and the number of rotations (rotation) of the detected object 115 is detected by detecting the unevenness due to the rotation of the detected object 115. Configured to know the amount).

Next, the operation of the liquid medicine supply device 1 having the above configuration will be described with reference to FIG. 15 based on the function of the control device that controls the operation of the liquid medicine supply device 1. When an operation portion (not shown) laid on the liquid medicine supply device 1 is operated so as to select the supply bottle 3 to be used alone, the control device drives the rotation drive unit 17 to select the supply bottle 3 to be used. The nozzle mounting plate 53 and the mounting body 5 are rotated by a predetermined angle around the vertical axis 16 as necessary so as to be positioned so as to face the front side of the operator.
Subsequently, the control device drives the moving device 52 to move the drive gear 47 in the horizontal direction so that the driven gear 41 is engaged (fitted). That is, as shown in FIG. 8, the pressing roller 73 is in contact with the opposing surface 74a of the first pressed body 74, and the opposing surfaces 74a and 75a of the first pressed body 74 and the second pressed body 75 are parallel to each other. From this state, the moving motor 58 is driven to rotate the motor shaft 60 about the axis (for example, clockwise in FIG. 8) [Step 1].
Then, the pressing roller 73 moves away from the facing surface 74 a of the first pressed body 74 and moves toward the facing surface 75 a of the second pressed body 75, and the outer peripheral surface of the pressing roller 73 is the second pressed body 75. The opposing surface 75a hits on the spring body 76 side and presses the opposing surface 75a forward, receives the forward pressing force that the second pressed body 75 rotates around the pin 110, and guides it to the guide mechanism 56. The moving table 55 moves forward relative to the support table 57 while being moved. The elasticity of the spring body 76 is determined so that the pressing roller 73 faces the first pressed body 74 in consideration of the weight of the supply motor 54, the moving base 55, the drive gear 47, the friction force in the guide mechanism 56, and the like. It is necessary to set in advance so that only the second pressed body 75 does not rotate around the pin 110 without moving the moving base 55 when pressing 74a.

As the motor shaft 60 rotates, the detected disk 95 rotates together with the motor shaft 60, and the detected portion 95a is detected by the first sensor portion 112 instead of the detected portion 95b as shown in FIG. [Step 2] The control device stops driving the moving motor 58 [Step 3].
When the driving of the moving motor 58 is stopped, the rotation of the motor shaft 60 and the rotation of the detection disc 95 are also stopped. At this time, the second sensor unit 113 is at a predetermined position of the moving base 55 and the driven gear 41 and the driven gear 41. It is detected whether or not it has moved to a position where it engages [Step 4].
If the second sensor unit 113 has moved to a position where the drive gear 47 and the driven gear 41, which are predetermined positions of the moving base 55, are engaged, the detection unit 113a detects the detected portion 113b, and control is performed based on the signal. The apparatus outputs a drive signal to the supply motor 54 and rotates the motor shaft 61 so that a required amount of the liquid medicine 2 is supplied to the liquid medicine bottle 4 [Step 5].
FIG. 9 shows a state where the moving base 55 has moved to a position where the drive gear 47 and the driven gear 41 are engaged with each other.

When the required amount of liquid medicine 2 is supplied to the liquid medicine bottle 4, the control device outputs an inversion signal to the moving motor 58 [Step 6], and the detected part 95b is again detected by the first sensor part 112. Then, in step 7, the control device stops the moving motor 58 based on the signal [step 8].
Thereafter, the nozzle mounting plate 53 and the mounting body 5 are intermittently rotated around the vertical axis 16 to select the necessary supply bottle 3 alone and repeat the above [Step 1] to [Step 8]. Thus, the liquid medicine is supplied to the liquid medicine bottle 4.

  In [Step 4], if the second sensor unit 113 has moved to a position where the drive gear 47, which is a predetermined position of the moving base 55, and the driven gear 41 mesh, the detection unit detects the detected unit and drives Although it is determined that the gear 47 and the driven gear 41 have moved to a position where the gear 47 and the driven gear 41 are engaged with each other, when the detection unit does not detect the detected portion, the moving base 55 engages the driven gear 41 with the drive gear 47. It is determined that it has not moved to the position. Such a state is considered to be a state in which the tips of the teeth 68 of the drive gear 47 and the driven gear 41 are in contact with each other in the front-rear direction.

  FIG. 10 shows the above state, and the moving table 55 has not moved to the position where the tooth gaps 68 and 69 of the drive gear 47 and the driven gear 41 mesh with each other. Compared with the flat projection dimension t1, the planar projection dimension t2 of the moving base 55 with respect to the support base 57 in FIG. 10 is reduced by the height t3 of the tooth spaces 68 and 69.

However, since the amount of rotation of the motor shaft 60 of the moving motor 58 is the same, the amount of movement of the moving table 55 corresponding to the height t3 of the tooth gaps 68 and 69 must be absorbed by any component. Therefore, the amount of movement of the moving table 55 according to the height t3 is absorbed by the second pressed body 75 being pressed against the elasticity of the spring body 76 against the pressing roller 73 and rotating largely around the pin 110. It is configured to do. In other words, when the spring body 76 extends, the contact force in the front-rear direction between the teeth 68 of the drive gear 47 and the driven gear 41 is absorbed by the extension of the spring body 76 having predetermined elasticity.
Therefore, if the spring body 76 starts to extend more than before when the tips of the teeth 68 of the drive gear 47 and the driven gear 41 contact each other in the front-rear direction, even if the driving motor 58 continues to drive, it is excessive. It is possible to prevent the load from being applied, and it is possible to effectively prevent damage and failure of the electromechanical equipment such as the moving device 52, thereby realizing a long life.

When it is determined in [Step 4] that the teeth 68 of the drive gear 47 and the driven gear 41 are in contact with each other, the control device outputs an inversion signal to the moving motor 58 [Step 9]. This is performed again until the detected part 95b is detected by the first sensor part 112 [step 10], and the movable table 55 is returned to the original position.
In other words, in this embodiment, the moving device 52 is also used as a separation unit between the drive gear 47 and the driven gear 41, and the first sensor unit 112 is also used as a separation detection unit. Further, the first sensor unit 112 and the second sensor unit 113 are used as a detection unit that detects a smooth (drive transmission possible) engagement of the drive gear 47 and the driven gear 41, and the drive gear 47 and the driven gear 41. It is used as an unconnected detector that detects that the teeth 68 are in contact with each other (drive transmission is impossible).
Before returning to [Step 1], the control device causes the supply motor 54 to follow the gears 68 and 69 of the drive gear 47 by a half pitch, or a driven gear such as 1.5 pitch or 2.5 pitch. The motor shaft 61 is rotated so that the teeth 68 of the 41 tooth spaces 68 and 69 do not contact each other [step 11].

Alternatively, although not shown in the drawings, after moving the moving table 55 to the original position in [Step 10] and then to [Step 11], the moving motor 58 is driven to move the moving table 55 only once or twice. Control may be performed to move the drive gear 47 forward so that the drive gear 47 meshes with the driven gear 41 again.
This is because the drive gear 47 can mesh with the driven gear 41 in some cases. Then, it is not necessary to move to [Step 11]. In addition, as described above, when the second sensor unit 113 does not detect the detected portion even if the moving base 55 is moved forward so that the drive gear 47 meshes with the driven gear 41 again only once or twice, It is also possible to control to display an error.
Further, in order to return the moving base 55 to the original position, the control device is configured to output the reverse signal to the moving motor 58 in the above [Step 6] and [Step 9], but the present invention is not limited to this. Instead, the motor shaft 60 may be configured to rotate in the same direction as before until the detected portion 95b is detected again by the first sensor portion 112.

The front view which shows the whole structure of the liquid medicine supply apparatus which shows embodiment of this invention AA line sectional view (side sectional view) in FIG. BB sectional view (plan sectional view) in FIG. A perspective view from one direction, mainly depicting the moving device A perspective view from the other direction, mainly depicting the moving device. Front view showing the internal structure of the supply pump when not in use Front view showing the internal structure of the supply pump in the same manner Similarly, it is a figure mainly showing the moving device, and a plan view showing a state where the drive gear and the driven gear are separated from each other Similarly, it is a diagram mainly showing the moving device, and a plan view of a state in which the drive gear and the driven gear are engaged with each other. Similarly, it is a diagram mainly showing the moving device, and a plan view of the state where the teeth of the drive gear and the driven gear are in contact with each other Similarly, a front view of the moving device viewed from the supply pump side Similarly, a sectional side view of the drive gear and the driven gear separated from each other Similarly, a side sectional view of a state in which the drive gear and the driven gear are engaged with each other. Side sectional view of the state where the teeth of the driving gear and the driven gear are in contact with each other Same control flow chart

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Liquid medicine supply apparatus, 2 ... Liquid medicine, 3 ... Supply bottle, 4 ... Liquid medicine bottle, 5 ... Mounting body, 16 ... Vertical axis, 17 ... Rotation drive part, 18 ... Supply pump, 20 ... Pump drive , 22 ... supply nozzle, 23 ... mounting means, 24 ... mounting table, 25 ... lifting device, 28 ... rotating motor, 29 ... supply pipe, 41 ... driven gear, 47 ... drive gear, 52 ... moving device, 54 ... Supply motor, 55 ... moving base, 56 ... guide mechanism, 57 ... support base, 58 ... moving motor, 68 ... tooth, 69 ... groove, 73 ... pressing roller, 74 ... first pressed body, 75 ... second. Pressed body, 76 ... Spring body, 95 ... Detected disk, 95a, 95b ... Detected part, 112 ... First sensor part, 113 ... Second sensor part, 114 ... Third sensor part

Claims (6)

A locking rotation claw connected to the motor shaft side of the supply motor, and a locked rotation for operating the drug supply unit by rotating to interlock with the locking rotation claw by locking with the locking rotation claw A claw is provided, and the locking rotary claw and the locked rotary claw are moved closer to and away from each other by a moving device so that the driving force from the locked rotary claw is connected to the locked rotary claw. The locking rotating claw and the locked rotating claw have a concavo-convex portion having a relative shape, and the concavo-convex portions are fitted to each other, and the driving force is transmitted to the locked rotating claw by the rotation of the locking rotating claw. A medicine supply device that supplies medicine toward a predetermined place,
The protrusions of the locking rotating claw and the locked rotating claw are moved by relatively moving the locking rotating claw and the locked rotating claw in the fitting direction of the concave and convex portions of the locking rotating claw and the locked rotating claw. Is provided with an elastic absorption mechanism that elastically absorbs the pressing force acting between the convex portions when the contact is made ,
When the protrusions of the locking rotating claw and the locked rotating claw are brought into contact with each other by driving the moving device, the locking rotating claw and the locked rotating claw are relatively separated from each other so that the protruding parts are displaced from each other. A drug supply device that drives a supply motor . An unconnected detector is provided for detecting that the projections of the locking rotary claw and the locked rotating claw are in contact with each other by driving the moving device, and the locking rotary claw is detected according to a detection signal from the non-connected detection unit. and by the engaged rotation pawl is relatively spaced, protrusions each other of the locking rotary pawl and the engaged rotation pawl spaced detector is provided for detecting that spaced apart by a predetermined distance,該離between detector drug supply apparatus according to claim 1 in which the convex portions each other by the detection signal is characterized and Turkey the feed motor is driven such that positional deviation from. Mobile device, transfer a rotating motor, a pressing body that runs according to the driving of the movement motor, and the pressing body is pressed by the operation of pressing pressure body, reciprocatable supply motor is fixed and Do moving base, is interposed between the moving base and the pressed body, it is provided with an elastic member to absorb the pressing force acting on the convex portion each other by moving while supporting the該被pressing member elastically The drug supply device according to claim 1 or 2, characterized in that: The medicine supply device according to claim 3, wherein the pressing body revolves in a horizontal plane around the motor axis of the moving motor to press the pressed body. The supply unit is a supply pump that supplies liquid medicine as a medicine to the liquid medicine bottle supplied to the patient from the liquid medicine supply bottle by operating the supply pipe with the rotation of the locked rotating claw. The supply pumps are arranged side by side on the same circumference around the vertical axis, the supply motor is arranged radially inward of the supply pump, and the locked rotary claw and the locked rotary claw are: The supply motor can be disconnected by moving the supply motor inward and outward in the radial direction between the supply pumps, and the supply motor and the supply pump are relatively rotatable about the vertical axis. The drug supply device according to any one of claims 1 to 4 , wherein the drug supply device is provided. 2. The locking rotary claw and the locked rotary claw are each formed by concave and convex teeth having a triangular cross section formed radially on the opposing surface with the motor shaft of the supply motor as a center. The medicine supply device according to any one of claims 5 to 5 .

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