JP5569930B2 - 2-axis mixer - Google Patents

Description

  The present invention relates to a twin-shaft mixer suitable for producing, for example, ready-mixed concrete.

  Conventionally, as a mixer for producing ready-mixed concrete, for example, there is a biaxial mixer. FIG. 7 and FIG. 8 are diagrams for explaining a biaxial mixer previously filed by the present applicant. The biaxial mixers 101 and 101 ′ are arranged in parallel in two kneading tanks 102 into which a kneaded material is charged. The kneading shaft 103 is penetrated, and its end is rotatably supported by a bearing 104 fixed to the kneading tank 102, and a plurality of kneading blades 105 are provided radially around the kneading shaft 103. . A speed reducer 106 is provided on one end side of the kneading shaft 103, and an output shaft 107 of the speed reducer 106 and the kneading shaft 103 are connected to each other, and a pulley 109 fixed to the input shaft 108 of the speed reducer 106, A pulley 112 fixed to an output shaft 111 of a driving motor 110 provided in the upper part of the machine 106 is wound around a V belt 113, and the driving force from the driving motor 110 is applied to the kneading shaft 103 via the speed reducer 106. It is configured to transmit and rotate at a predetermined speed (see Patent Document 1).

  Further, various tuning mechanisms are employed so that the respective kneading blades 105 do not interfere when rotating each kneading shaft 103. For example, in the biaxial mixer 101 shown in FIG. The tuning gears 114 fixed to the portions are meshed with each other to synchronize the rotation of the kneading shafts 103. Further, in the biaxial mixer 101 ′ shown in FIG. 8, instead of the tuning gear, the input shafts 108 provided on the sides of the reduction gears 106 are connected to each other by a coupling mechanism 115. The mixer is also made compact while the rotation of each kneading shaft 103 is synchronized.

  FIG. 9 shows the speed reducer 106 employed in the biaxial mixer 101 ′ shown in FIG. 8. As described above, the input shafts 108 of the speed reducers 106 are connected to each other by the coupling mechanism 115 which is a tuning mechanism. In order to connect, it has provided in the side of the reduction gear 106 so that each input shaft 108 may be made to oppose. At this time, as shown in FIG. 9, the input shaft 108 is arranged in a direction perpendicular to the output shaft 107, and therefore a secondary input shaft 108 ′ is separately arranged on the same axis as the output shaft 107. The input shaft 108 and the slave input shaft 108 'are engaged with each other by bevel gears 116 and 116', so that the driving force from the input shaft 108 is transmitted to the output shaft 107 side through the slave input shaft 108 'in the orthogonal direction. It is possible.

JP 2004-114008 A

  However, bevel gears that are used for tuning the kneading shaft in a biaxial mixer that employs the above coupling mechanism generally require a high accuracy in the meshing portion between the orthogonal gears, so that the manufacturing cost is generally low. It is easy to be expensive, and this is one factor that hinders cost reduction of the apparatus.

  An object of the present invention is to provide a two-shaft mixer in which the kneading shaft tuning mechanism is configured with an inexpensive one and the apparatus cost is reduced.

In order to solve the above-mentioned problems, the present invention provides a biaxial mixer according to claim 1, wherein a kneading tank into which a kneading material is charged and two parallel kneadings that pass through the kneading tank rotatably. and the shaft, in a twin-screw mixer with two of the drive motor, and a speed reducer decelerating the rotation speed of the driving motor is transmitted to the kneading shaft for rotationally driving the respective kneading axis to opposite directions there are, provided rotatably in parallel to the tuning axis and the input shaft to one of the reduction gear, is rotated in the opposite directions with the input shaft tuning shaft are meshed with the input shaft and the tuning axis at tuning gear Rutotomoni aligning the rotational direction of the input shaft of the tuning axis and the other of the reduction gear in the same direction, at one end of the tuning shaft fixing a first tuning pulley, the input of the first tuning pulley and the other speed reducer Rotation of each kneading shaft by winding a second synchronous pulley fixed to one end of the shaft with a timing belt It is characterized by being configured to tune.

According to the two-shaft mixer according to the first aspect of the present invention, one of the reduction gears is provided with a tuning shaft that is rotatable in parallel with the input shaft, and the tuning shaft and the input shaft are engaged with each other by a tuning gear. It is not aligned direction of rotation of the input shaft of rotates in opposite directions with the input shaft tuning shaft and the other of the reduction gear tuning shaft in the same direction Rutotomoni, at one end of the tuning shaft fixing a first tuning pulley The first tuning pulley and the second tuning pulley fixed to one end of the input shaft of the other speed reducer are wound around a timing belt to synchronize the rotation of each kneading shaft. The shaft tuning mechanism can be constructed at a relatively low cost, and the apparatus cost can be reduced.

It is a front view which shows one Example of the biaxial mixer which concerns on this invention. It is a top view of FIG. It is a side view of FIG. It is the principal part enlarged view which notched a part of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a principal part enlarged view of FIG. It is a figure equivalent to FIG. 2 which shows a prior art example. It is a figure equivalent to FIG. 2 which shows another prior art example. It is a partially cutaway enlarged view of the reducer portion of FIG.

In the biaxial mixer according to the first aspect of the present invention, the kneading tank is provided with two parallel kneading shafts, and two drive motors for rotating the kneading shafts in opposite directions. And a speed reducer that reduces the number of rotations of the drive motor and transmits it to the kneading shaft. One speed reducer is provided with a tuning shaft that is rotatable in parallel with the input shaft. The tuning shaft and the input shaft are engaged with each other by a tuning gear to rotate the tuning shaft in a direction opposite to the input shaft. the direction of rotation of the input shaft of the tuning axis and the other of the reduction gear with which the so that align in the same direction Te, at one end of the tuning axis is fixed to the first tuning pulley. A second tuning pulley having the same structure is also fixed to one end portion of the input shaft of the other speed reducer, and a timing belt is wound around each of the tuning pulleys so as to synchronize the rotation of each kneading shaft. It is configured.

  In addition, since the input shaft of each speed reducer is rotated in the opposite direction like the kneading shaft, the timing belt cannot be directly wound around each of the input shafts to be synchronized. As described above, by separately arranging a tuning shaft in parallel with the input shaft of one speed reducer and rotating it in the opposite direction to the input shaft, the rotational direction of the tuning shaft and the input shaft of the other speed reducer can be changed. It is aligned in the same direction and can be synchronized by the timing belt.

  Thus, instead of the bevel gear used in the kneading shaft tuning mechanism of the conventional device, the tuning mechanism can be configured with relatively inexpensive components such as pulleys and timing belts, thereby reducing the cost of the device. Can be achieved.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 to FIG. 6 are drawings showing an embodiment of a biaxial mixer according to the present invention. In FIG. 1, reference numeral 1 denotes a biaxial mixer body for kneading various materials, which is composed of two twin cylinders. Two parallel kneading shafts 3 (3 ') are passed through the kneading tank 2, and both ends of the kneading shaft 3 (3') are rotatably supported by bearings 4 fixed to the kneading tank 2. In addition, each kneading shaft 3 (3 ') is rotated so that the rotation locus is along the inner wall of the kneading tank 2, and the material in the kneading tank 2 is continuously moved in the direction of the kneading shaft 3 (3'). Two spiral blades 5 to be sent out are provided via an arm 6.

  7 (7 ') is a driving motor for rotationally driving the kneading shaft 3 (3'), and on the side thereof, the rotational speed of the driving motor 7 (7 ') is reduced and the kneading shaft 3 ( A speed reducer 8 (8 ') for transmitting to 3') is arranged. The speed reducer 8 (8 ') includes an input shaft 9 (9') that receives the driving force from the driving motor 7 (7 ') and an output shaft 10 (10' that transmits the received driving force to the outside. ), And the input shaft 9 (9 ′) is provided with a pulley 11 (11 ′), and the drive shaft 12 (12 ′) of the drive motor 7 (7 ′) is provided with a pulley 13 (13 ′). The V-belt 14 (14 ') is wound around these pulleys 11, 13 (11', 13 '), while the output shaft 10 (10') is connected to the kneading shaft 3 (3 '). doing.

  The speed reducer 8 (8 ') has an input shaft 9 (9') and an output shaft 10 (10 ') in parallel with the kneading shaft 3 (3') at vertical positions inside a vertically formed casing 15 (15 '). A plurality of rotary shafts 16 and 17 (16 'and 17') are supported in parallel at an intermediate position between the input shaft 9 (9 ') and the output shaft 10 (10'). The input shaft 9 (9 '), the rotary shafts 16, 17 (16', 17 ') and the output shaft 10 (10') are respectively helical gears 18a, 18b, 18c (18a ', 18b', 18c). ′), And the rotation of the input shaft 9 (9 ′) is interlocked with the output shaft 10 (10 ′) via the rotary shafts 16 and 17 (16 ′ and 17 ′). The helical gears 18a to 18c (18a 'to 18c') are formed so that their diameters gradually increase from the input side toward the output side, and are rotated by the drive motor 7 (7 '). While the rotational speed of the shaft 9 (9 ′) is gradually reduced, the torque is increased and transmitted to the output shaft 10 (10 ′).

  One speed reducer 8 has a tuning shaft 19 rotatably supported in parallel with the input shaft 9, and the tuning shaft 19 and the input shaft 9 are engaged with each other by a tuning gear 20. The input shaft 9 is rotated in the opposite direction. The first tuning pulley 21 is fixed to one end portion of the tuning shaft 19, while the second tuning pulley 21 'is fixed to one end portion of the input shaft 9' of the other speed reducer 8 '. A timing belt 22 is wound around each of the tuning pulleys 21 and 21 'so as to synchronize the rotation of the kneading shafts 3 and 3'.

  Since the input shafts 9 and 9 'of the speed reducers 8 and 8' are rotated in the opposite directions like the kneading shafts 3 and 3 ', a timing belt is directly wound around the input shafts 9 and 9'. Although it cannot be tuned, in the tuning mechanism of the present proposal, a tuning shaft 19 is separately arranged in parallel with the input shaft 9 of one speed reducer 8 and is rotated by the tuning gear 20 in a direction opposite to the input shaft 9. As a result, the rotation direction of the tuning pulley 21 fixed to the tuning shaft 19 and the tuning pulley 21 'fixed to the input shaft 9' of the other speed reducer 8 'can be aligned in the same direction. Thus, the timing belt 22 can be synchronized.

  As described above, according to the present invention, it is possible to configure the tuning mechanism of the biaxial mixer with relatively inexpensive components such as a pulley and a timing belt, and it can be expected that the apparatus cost can be reduced.

  In the present embodiment, the synchronization mechanism is constituted by a pulley or a timing belt. However, for example, a sprocket can be used instead of the pulley, and a chain can be used instead of the timing belt.

DESCRIPTION OF SYMBOLS 1 ... Two-shaft mixer 2 ... Kneading tank 3, 3 '... Kneading shaft 5 ... Spiral blade 6 ... Arm 7, 7' ... Drive motor 8, 8 '... Reduction gear 9, 9' ... Input shaft 10, 10 ' ... Output shaft 19 ... Tuning shaft 20 ... Tuning gear 21, 21 '... Tuning pulley 22 ... Timing belt

Claims (1)

A kneading tank for charging the kneading material, two parallel kneading shafts rotatably passing through the kneading tank, two drive motors for rotating the kneading shafts in opposite directions, and the drive A two-shaft mixer comprising a speed reducer that decelerates the number of rotations of the motor and transmits it to the kneading shaft, wherein one speed reducer is rotatably provided with a tuning shaft parallel to its input shaft, Rutotomoni aligning the rotational direction of the input shaft of the tuning axis and the other of the reduction gear is rotated in the opposite directions with the input shaft tuning shaft is meshed with said input shaft at tuning gears in the same direction, one end portion of the tuning shaft The first tuning pulley is fixed, and the first tuning pulley and the second tuning pulley fixed to one end of the input shaft of the other speed reducer are wound around a timing belt to rotate each kneading shaft. A biaxial mixer characterized by being configured to tune.

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