JP4740749B2 - mixer - Google Patents

Description

  The present invention relates to a mixer used for mixing fluid materials such as solder paste and various chemical substances.

  For example, when producing cream-like solder used for soldering electronic parts, etc., a mixer having a mixing container that revolves and rotates is used, and the mixing container containing a plurality of materials to be mixed is rotated 1000 times or more. In addition to revolving at a high speed, the materials therein are uniformly mixed by rotating at an appropriate speed. In this case, in order to obtain a product with good quality, it is important to appropriately control the revolution speed and the rotation speed of the mixing container according to the type and characteristics of the material.

  The conventional general mixer is configured to perform revolution and rotation of the mixing container by using a single motor and a transmission mechanism including a gear, a transmission belt, and the like. However, in the drive system in which the mixing container is revolved and rotated by one motor in this way, the revolution speed and the rotation speed cannot be controlled separately and freely. Mixing cannot be performed.

Therefore, in order to solve such a problem, Patent Document 1 discloses a mixer (kneading device) in which the revolution and rotation of the mixing container are performed by separate motors. According to this mixer, since the revolution speed and the rotation speed can be controlled independently, it is possible to perform proper mixing according to the type and characteristics of the material, and to obtain a product with good quality. it can.
Japanese Patent Laid-Open No. 10-43567

  However, the mixer described in Patent Document 1 directly connects the motor for rotation to the mixing container, and the motor revolves together with the mixing container. Therefore, the inertia at the time of revolution depends on the weight of the motor. Not only does the force become very large and a revolving motor with a large capacity has to be used, it also has the disadvantage that speed control with high speed and responsiveness is difficult to perform. In addition, since the same number of rotation motors as the mixing containers are required, the number of motors increases according to the number of mixing containers.

  Accordingly, an object of the present invention is to provide a rational design structure capable of independently controlling the revolution speed and rotation speed of the mixing container with a small number of motors without increasing the inertial force or the like during the revolution of the mixing container. It is to provide a mixer having.

In order to achieve the above object, a mixer according to the present invention includes a rotating board disposed inside a housing so as to be rotatable around a vertical revolution axis, and a rotation board that is inclined with respect to the revolution axis. A container holder that is mounted so as to be rotatable about an axis and holds a mixing container containing a mixture, a revolving motor that rotates the rotating substrate, a revolving motor that revolves the container holder, and the revolving motor A rotation transmission mechanism that transmits the rotational force of the rotation motor to the rotating substrate and a rotation transmission mechanism that transmits the rotation force of the rotation motor to the container holder, and the rotation motor and the rotation motor have the same capacity and size. , this which by being placed side by side at a position opposing symmetrical to each other across the revolution axis of the housing, the weight balance between the left and right of the mixer is achieved The one in which the features.

In the mixer according to the present invention , the main base is horizontally provided inside the housing, and the cylindrical bearing portion is vertically fixed at the center position of the upper surface of the main base, and the revolving operation is performed inside the bearing portion. A shaft is rotatably supported through a bearing, the revolution motor and the rotation motor are disposed below the main base, and the revolution transmission mechanism is a revolution drive pulley attached to the output shaft of the revolution motor. And a revolving driven pulley attached to the revolving shaft, and a transmission belt stretched between the revolving driving pulley and the revolving driven pulley, and the revolving transmission mechanism has a bearing on the outer periphery of the bearing portion. A center gear and a rotation driven pulley that are rotatably attached to each other and integrally coupled to each other, and a rotation mounted on the output shaft of the rotation motor. A driving pulley, a transmission belt stretched between the rotation driving pulley and the rotation driven pulley, a rotation transmission shaft rotatably attached to the rotating substrate, and the center fixed to the rotation transmission shaft A driven gear that meshes with the gear and revolves around the center gear while rotating together with the rotation transmission shaft, a rotation drive pulley on the rotation substrate side fixed to the rotation transmission shaft, and a rotation substrate provided on the container holder It is preferable that the rotation driven pulley on the side and a transmission belt stretched between the rotation driving pulley on the rotating substrate side and the rotation driven pulley are desirable.

  Furthermore, the mixer of the present invention has a control device for controlling the speed of the revolution motor and the rotation motor, and the control device detects a rotation speed of the revolution motor and the rotation motor and a rotation speed sensor. And an inverter individually connected to each motor, and by changing the supply frequency to each motor by the inverter based on the difference between the speed detected by the speed sensor and the set speed, these motors Are configured to independently control the speed.

  In the mixer of the present invention, the revolution speed and rotation speed of the mixing container can be controlled independently by separate motors, so that appropriate mixing can be performed according to the type and characteristics of the material to be mixed. You can get a good quality product. In addition, since the revolving motor and the revolving motor are fixedly installed at fixed positions inside the housing, the revolving motor is integrally connected to the mixing container so that the revolving motor is revolved together with the mixing container. In comparison, not only is the structure simple, but the inertial force at the time of revolution of the mixing container is small, so that the speed control is easy and the response is excellent. In addition, since it is not necessary to provide the same number of rotation motors as the mixing container, the number of motors can be reduced.

  Hereinafter, a preferred embodiment of the mixer according to the present invention will be described in detail. In FIG. 1 to FIG. 3, reference numeral 1 denotes a substantially rectangular box-shaped housing having an openable / closable lid 2 at the top, and a main base 3 is horizontally placed in the middle of the housing 1. Is provided. The main base 3 is supported on the upper end of a support frame 13 rising from the inner bottom portion of the housing 1 via a vibration absorbing member 14 such as rubber or a spring. A shaft-shaped bearing portion 4 is provided vertically, and a revolving shaft 5 facing in the vertical direction is supported in the bearing portion 4 so as to be rotatable via a bearing 6. 7 is fixed.

As can be seen from FIG. 4, the rotary substrate 7 has a rectangular horizontal portion 7a located at the center and inclined portions 7b and 7b extending obliquely upward from both ends of the horizontal portion 7a. The revolution shaft 5 is connected to the center of the lower surface of the horizontal portion 7a. In addition, a cylindrical container holder 9 for holding a mixing container 11 containing a material to be mixed is provided on the bearing part 8 provided in each inclined part 7b. Thus, it is attached so as to be rotatable about the rotation shaft 10.
Accordingly, the two container holders 9 and 9 that are symmetrically attached to both sides of the rotating substrate 7 can rotate about the rotation shaft 10 respectively, and at the same time, the rotating substrate 7 rotates about the revolution shaft 5. Can revolve around the revolution axis 5.

  The upper part of the container holder 9 is open, and the mixing container 11 is taken in and out from the upper part. In addition, examples of the mixture include fluid materials such as solder paste and other various chemical substances.

  A tray 12 having a generally conical shallow dish shape covering the upper surface of the rotating substrate 7 is attached to the rotating substrate 7, and an upper end portion of each mixing container 11 is opened to the tray 12 through an opening 12 a. It is designed to be exposed on the top surface of the.

Inside the housing 1, a revolving motor 15 for rotating the rotating substrate 7 and a rotating motor 16 for rotating the container holder 9 are disposed at fixed positions below the main base 3 at an output shaft. 15a and 16a are fixedly installed vertically and upward. These two motors 15 and 16 have substantially the same capacity and size as each other, are arranged side by side in symmetrical positions opposite to each other with the revolution shaft 5 interposed therebetween, and are coupled to the lower surface of the main base 3. It is attached to the lower surface of the base 17. One revolving motor 15 is connected to the revolving shaft 5 via a revolving transmission mechanism 18, and the other revolving motor 16 is connected to the two container holders 9, 9 via a revolving transmission mechanism 19. Yes.
Thus, by arranging the two heavy motors 15 and 16 side by side at symmetrical positions on the inner bottom of the housing 1, the center of gravity of the entire mixer is lowered and the right and left weight balance is achieved, so that high speed rotation is achieved. The vibration at the time is suppressed and the stability is improved.

  2 and 5, the revolution transmission mechanism 18 includes a revolution driving pulley 22 attached to the output shaft 15 a of the revolution motor 15 and a revolution driven pulley 23 attached to the lower end portion of the revolution shaft 5. And a transmission belt 24 stretched between these pulleys 22 and 23, and when the revolution motor 15 is driven, the revolution drive pulley 22, the transmission belt 24, and the revolution driven pulley 23 are passed through. While the revolving shaft 5 rotates, the rotating substrate 7 rotates, and the two container holders 9 and 9 revolve around the revolving shaft 5.

  2 and 6, the rotation transmission mechanism 19 includes a center gear 27 that is rotatably attached to the outer periphery of the bearing portion 4 via a bearing 26, and the rotation to the center gear 27. The primary side transmission portion 28 that transmits the rotational force of the motor 16 and the two sets of secondary side transmission portions 29 that transmit the rotational force of the central gear 27 to the two container holders 9 and 9 are configured. The center gear 27 is located concentrically with the revolution shaft 5 and is rotatable relative to the revolution shaft 5.

  The primary transmission unit 28 includes a rotation driven pulley 31 integrally coupled to a lower portion of the center gear 27, a rotation driving pulley 32 attached to the output shaft 16a of the rotation motor 16, and the pulleys 31 and 32. It is comprised with the transmission belt 33 spanned between. In the actual configuration shown in FIGS. 1 and 2, the rotation driven pulley 31 is rotatably attached to the outer periphery of the bearing portion 4 via a bearing 26, and is provided on the outer periphery of the upper cylindrical portion of the rotation driven pulley 31. The center gear 27 is fitted and fixed.

The secondary transmission unit 29 includes a vertical rotation transmission shaft 36 that is rotatably attached to the horizontal portion 7 a of the rotary substrate 7, and a lower end portion of the rotation transmission shaft 36 on the lower surface side of the rotation substrate 7. 4, a driven gear 37 that meshes with the center gear 27, a rotation driving pulley 38 that is fixed to the upper end portion of the rotation transmission shaft 36 on the upper surface side of the rotating substrate 7, as can be seen from FIG. 4, and the container holder 9, a rotation driven pulley 39 provided at 9, and a transmission belt 40 stretched around the rotation driving pulley 38 and the rotation driven pulley 39.
In the figure, 41 and 42 are tension pulleys disposed between the drive pulley 38 and the driven pulley 39 on the rotating substrate 7, and change the direction of the transmission belt 40 according to the inclined driven pulley 39. At the same time, the tension of the transmission belt 40 is adjusted.

  When the rotation motor 16 is driven in the rotation transmission mechanism 19, the center gear 27 rotates through the rotation drive pulley 32, the transmission belt 33, and the rotation driven pulley 31, so that the driven gear 37 meshing with the rotation rotates. At the same time, the rotation transmission shaft 36 integral with the driven gear 37 and the rotation driving pulley 38 at the upper end thereof rotate, and the rotational force is transmitted to the container holder 9 via the transmission belt 40 and the rotation driven pulley 39. Thus, the container holder 9 rotates about the rotation axis 10.

  Accordingly, when the revolving motor 15 and the revolving motor 16 are driven simultaneously, the two container holders 9 and 9 revolve around the revolving shaft 5 while revolving around the revolving shaft 5, and the respective container holders 9 and 9 are revolved. The to-be-mixed material in the mixing container 11 held in the container is mixed. In this case, the revolution speed is usually about 1,000 to 2,000 rpm, and the rotation speed is about 400 to 800 rpm. These revolution speed and rotation speed can be independently controlled by separate motors 15 and 16. Therefore, appropriate mixing can be performed according to the type and characteristics of the mixture, and a product with good quality can be obtained. Needless to say, the revolution speed and the rotation speed may be values other than those described above.

  Further, the revolving motor 15 and the rotating motor 16 which are heavy in weight are fixedly installed at fixed positions on the inner bottom portion of the housing 1, so that the rotating motor 16 is integrally connected to the mixing container 11 together with the mixing container 11. Compared to a conventional mixer that revolves in a normal manner, not only is the structure simple, but also the inertial force at the time of revolution of the mixing container 11 is small, so speed control is easy and responsiveness is excellent. Moreover, since the two mixing containers 11 and 11 are rotated by the single rotation motor 16, the same number of motors as the mixing containers 11 and 11 are not required, and therefore the number of motors can be reduced.

  1 and 2, 45 is a revolution speed sensor for detecting the rotation speed (revolution speed) of the revolution motor 15, and 46 is a rotation speed for detecting the rotation speed (rotation speed) of the rotation motor 16. Each of the motors 15 and 16 is independently controlled by the control device 47 (see FIG. 7) based on the difference between the speed detected by the speed sensors 45 and 46 and the set speed.

  The speed sensors 45 and 46 are respectively attached to the main base 3 and have a light projecting portion and a light receiving portion located on both sides of a disk 49 that rotates integrally with the drive pulleys 22 and 32, and The rotation speed of each motor is detected by detecting and counting light transmitted through a plurality of gaps such as slits and holes formed in the disk 49 with these light projecting parts and light receiving parts. is there. However, the speed sensors 45 and 46 are not limited to such optical sensors, and may be ones that electrically detect the speed.

  As a safety device, the housing 1 is provided with a vibration sensor 50 (see FIG. 7) for detecting abnormal vibration during operation and a safety switch 51 (see FIG. 7) that operates when the lid 2 is opened. The motors 15 and 16 are configured to be in a non-driven state by the control device 47 when the vibration sensor 50 and the safety switch 51 are operated. In FIG. The safety switch 51 is not shown.

  FIG. 7 shows an example of the control device 47. The control device 47 is provided in the housing 1, and includes a control board 54 on which a control circuit is mounted, a power supply device 53 that supplies power necessary for the control board 54, and setting of revolution speed and rotation speed. It has an operation panel 55 for performing operations such as on / off, and inverters 56 and 57 connected between the control board 54 and the motors 15 and 16. The inverters 56 and 57 control the rotational speed of the motors by changing the power frequency supplied to the motors 15 and 16 (induction motors). As shown in FIGS. Is attached to the support frame 13 in the vicinity of the motors 15 and 16.

  In operating the mixer, first, according to the type, characteristics or mixing conditions of the material to be mixed accommodated in the mixing container 11, the rotation measurement (revolution speed) of the revolution motor 15 and the rotation motor are controlled by the operation panel 55. 16 rotation speeds (spinning speeds) are set. FIG. 8 shows examples of these settings. FIG. 4A is a setting example for controlling the speed so that the revolution speed is decreased in the latter half of the mixing step and the speed ratio is changed while keeping the rotation speed constant. Is a setting example for alternately reversing the revolution direction and the rotation direction at specific time intervals while keeping the revolution speed and the rotation speed in a fixed relationship. Of course, the revolution / spinning speed ratio, rotation direction, and the like can be freely set to other relationships.

  After the above setting is completed, when the start button on the operation panel 55 is pressed to turn on the mixer, the revolution motor 15 and the rotation motor 16 are activated to start mixing. Rotational measures of these motors are respectively detected by speed sensors 45 and 46, fed back to the control circuit on the control board 54 and compared with the set speed, and necessary arithmetic processing is performed. The calculation result is converted into an analog signal of 0 to 5 V and output to each of the inverters 56 and 57, and the power frequency is adjusted by the inverters 56 and 57 according to the difference between the set speed and the detected speed. As a result, the speeds of the motors 15 and 16 are independently controlled.

  Thus, by performing the speed control of the revolution motor 15 and the rotation motor 16 with the inverters 56 and 57, acceleration / deceleration can be smoothly performed as compared with the case where the rotation ratio is switched using, for example, a gear mechanism or a clutch. At the same time, the rotation ratio of revolution / spinning can be arbitrarily and appropriately set according to the type and characteristics of the mixture, and as a result, a product with good quality can be obtained.

  The revolving motor 15 and the rotating motor 16 are usually used for a three-phase 100V. However, by appropriately selecting the inverters 56 and 57, even if the power source is a single-phase 100V for home use, Even a large 200V can be handled without replacing the motor and its components.

It is sectional drawing which shows the mixer which concerns on this invention roughly. It is the elements on larger scale in FIG. FIG. 2 is a side sectional view of a main part in FIG. 1. It is a top view of the principal part in FIG. FIG. 2 is a cross-sectional plan view schematically showing a configuration of a revolution transmission mechanism in FIG. 1. It is a cross-sectional top view which shows schematically the structure of the autorotation transmission mechanism in FIG. It is a connection diagram of the control apparatus of the mixer of FIG. (A) is a diagram which shows the example of a setting of revolution speed and autorotation speed. (B) is a diagram which shows the other example of a setting of revolution speed and rotation speed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 5 Revolving shaft 7 Rotating board 9 Container holder 10 Rotating shaft 11 Mixing container 15 Revolving motor 16 Rotating motor 18 Rotating transmission mechanism 19 Rotating transmission mechanism 27 Center gear 36 Rotating transmission shaft 37 Driven gear 38 Rotating drive pulley 39 Rotating driven pulley 40 Transmission belt 45 Revolution speed sensor 46 Rotation speed sensor 47 Control device 56, 57 Inverter

Claims (3)

A rotating board disposed inside the housing so as to be rotatable around a vertical revolution axis, and attached to the rotating board so as to be rotatable around a rotation axis inclined with respect to the revolution axis. A container holder for holding a mixing container containing a mixture, a revolving motor for rotating the rotating substrate, a rotating motor for rotating the container holder, a revolving transmission mechanism for transmitting the rotational force of the revolving motor to the rotating substrate, A rotation transmission mechanism that transmits the rotational force of the rotation motor to the container holder;
The revolving motor and the rotating motor have the same capacity and size, and are arranged side by side in symmetrical positions opposite to each other across the revolving shaft inside the housing, so that the left and right weight balance of the mixer mixer wherein the is achieved. A main base is horizontally provided inside the housing, and a cylindrical bearing portion is vertically fixed at a central position on the upper surface of the main base, and the revolving shaft is freely rotatable through the bearing inside the bearing portion. Supported, the revolving motor and the rotation motor are disposed at a position below the main base,
The revolution transmission mechanism includes a revolution driving pulley attached to the output shaft of the revolution motor, a revolution driven pulley attached to the revolution shaft, and a transmission spanned between the revolution driving pulley and the revolution driven pulley. With belt,
The rotation transmission mechanism includes a center gear and a rotation driven pulley that are rotatably attached to the outer periphery of the bearing portion via a bearing and integrally coupled to each other, and a rotation driving pulley that is mounted on an output shaft of the rotation motor. A transmission belt stretched between the rotation driving pulley and the rotation driven pulley, a rotation transmission shaft rotatably attached to the rotating substrate, and fixed to the rotation transmission shaft to the central gear. A driven gear that meshes and revolves around the center gear while rotating together with the rotation transmission shaft, a rotation drive pulley on the rotation substrate side fixed to the rotation transmission shaft, and a rotation substrate side provided on the container holder. It is composed of a rotation driven pulley and a transmission belt stretched between the rotation driving pulley on the rotating substrate side and the rotation driven pulley.
The mixer according to claim 1 . A control device for controlling the speed of the revolution motor and the rotation motor is provided, and the control device is connected individually to the revolution speed sensor and the rotation speed sensor for detecting the rotation speed of the revolution motor and the rotation motor, and to each motor. Inverters are used to control the speeds of these motors independently by changing the supply frequency to each motor based on the difference between the speed detected by the speed sensor and the set speed. The mixer according to claim 1 , wherein the mixer is configured as follows .

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