JPH059634U - Fixed amount supply device - Google Patents

Abstract

(57) [Abstract] [Purpose] A quantitative supply device in which a screw is driven by a drive motor through a speed reducer has a compact structure and improves cleaning and maintenance workability. A speed reducer 9 having a hollow output shaft 10 and input and output shafts orthogonal to each other is provided, and a drive motor is coupled to the input shaft,
Insert one end of the screw 3 into the hollow output shaft 10 of the speed reducer 9 and fix it with the set screw 11 to fix the screw 3
The rotation detector 12 is attached to the side surface of the speed reducer 9 with one end of which protrudes and is coupled to one end of the screw 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a constant quantity supply device, and more particularly to a constant quantity supply device using a single-coil type screw or a solid type screw used for supplying raw materials in an extruder or the like.

[0002]

[Prior Art]

 In the conventional coil type or solid type screw type constant amount supply device used for supplying raw materials such as extruders, as shown in FIGS. 4 and 5, the raw material hopper 21 is extended in one direction from the lower end discharge port. When a screw 23 is arranged in the nozzle 22 and a reducer 24 and a drive motor 25 are sequentially connected to the screw 23 via a shaft coupling 26 to control screw rotation, a pulley 27 or a pulley 27 is provided between them. The rotation was taken out through a sprocket or the like and transmitted to the rotation detector 28. In FIG. 4, 29 is a bearing that rotatably supports the screw 23. In FIG. 5, 30 is a pulley provided in the rotation detector 28, 31 is a belt wound between the pulleys 27 and 30, 32 is a controller of the drive motor 25, and a detection signal input from the rotation detector 28 The drive motor 25 is drive-controlled based on the above.

In some cases, instead of the speed reducer 24 and the drive motor 25, a motor with a continuously variable transmission was used to connect the screw 23 with a shaft coupling 26.

[0004]

[Problems to be solved by the device]

 However, in the above configuration, since the shaft joint 26, the speed reducer 24, the shaft joint 26, the pulley 27, the shaft joint 26, and the drive motor 25 are arranged in the axial center direction of the screw 23, the entire device becomes long and space is limited. There was a problem that was large. Also, when cleaning when changing raw materials or changing colors, the screw 23 is pulled out from the nozzle 22 for cleaning. At that time, the shaft coupling 26 must be disassembled, and the shaft coupling 26 must be covered. However, depending on the structure, the screw 23 may need to be pulled out to the side opposite to the raw material discharge side. In that case, the screw 23 must be removed unless the reducer 24 is removed. In some cases, there was a problem that the work would be extremely complicated. Further, there is a problem that the cover and the shaft coupling may have to be removed and the peripheral devices may have to be removed also when performing maintenance of other devices such as the speed reducer 24.

In view of the above conventional problems, an object of the present invention is to provide a constant quantity supply device which has a compact structure and has good workability for cleaning and maintenance.

[0006]

[Means for Solving the Problems]

 The present invention relates to a screw type constant quantity supply device in which one end of a screw is driven by a drive motor through a speed reducer, and has a hollow output shaft and the drive motor is coupled in a direction orthogonal to the axis of the hollow output shaft. One feature is that one end of the screw is fitted to the hollow output shaft of the speed reducer and fixed by fixing means, and the rotation detector is attached to the side of the speed reducer where one end of the screw protrudes and is connected to the one end of the screw. And

[0007]

[Action]

 According to the configuration of the present invention, one end of the screw is fitted into the hollow output shaft of the speed reducer, and the drive motor is connected to the hollow output shaft in the vertical direction, so that the axial length can be shortened. It can be made compact, and the screw, speed reducer and rotation detector can be easily assembled, and since it is not necessary to connect them by using a shaft coupling, the number of parts can be reduced, and the parts cost and assembly cost can be significantly reduced. The screw can be pulled out only by releasing the fixation of the hollow drive shaft and the screw by the fixing means, and the screw can be cleaned and maintained with good workability when changing raw materials.

[0008]

【Example】

 An embodiment in which the constant amount supply device of the present invention is applied to a constant amount supply device for raw materials in an extruder will be described below with reference to FIGS.

A raw material hopper 1 has a nozzle 2 extending in one direction from a lower end discharge port 1 a thereof, and a screw 3 is arranged in the nozzle 2. A swing port 4 is provided at the discharge end of the nozzle 2 so as to be swingable around the axis of the nozzle 2, and can be detached via a clamp ring 7 from a feed port 6 provided at the base end of a cylinder 5 of an extruder. It is connected to the.

A bearing 8 is arranged at an end portion of the nozzle 2 opposite to the discharge end, and a shaft portion 3 a of the screw 3 is rotatably supported. Further, the shaft portion 3 a of the screw 3 is opposite to the nozzle 2. Has been extended for a long time. Further, the shaft portion 3a of the screw 3 is formed to have a small diameter through the step portion, and the bearing 8 engages with the step portion so that the bearing 8 receives the reaction force acting on the screw 3 at the time of supplying the raw material. It is configured.

Reference numeral 9 denotes a speed reducer that drives the screw 3 to rotate, and has a hollow output shaft 10 and the output shaft and the input shaft are arranged orthogonally to each other. The shaft portion 3a of the screw 3 is inserted and fitted into the hollow output shaft 10 of the reduction gear 9, and the shaft portion of the hollow output shaft 10 and the screw 3 is set by the set screw 11 penetrating from the outer circumference to the inner circumference of the hollow output shaft 10. 3a is fixed. The tip portion of the shaft portion 3a of the screw 3 penetrates the hollow output shaft 10 and projects, and is coupled to the rotating portion of the rotation detector 12 such as a pulse generator. The fixed body of the rotation detector 12 is directly attached to the side surface of the speed reducer 9.

A flange-mounting type drive motor 13 including an inverter motor or a servomotor is attached to a side surface of the speed reducer 9 facing the input shaft, and is connected to the input shaft of the speed reducer 9. Reference numeral 14 is a controller for driving and controlling the drive motor 13, to which a detection signal from the rotation detector 12 is input.

In the above structure, when the drive motor 13 is driven by the controller 14, the screw 3 is rotationally driven through the speed reducer 9, and the raw material in the raw material hopper 1 is directed to the discharge end in the nozzle 2. The raw material is fed out, the rotation speed of the screw 3 is detected by the rotation detector 12, and is fed back to the controller 14, so that the raw material is supplied to the cylinder 5 with a high precision in a fixed amount.

Since the shaft portion 3a at one end of the screw 3 is fitted into the hollow output shaft 10 of the speed reducer 9, and the drive motor is arranged in the direction orthogonal to the hollow output shaft 10, The length of the clew 3 in the axial direction can be shortened, and the entire device can be made compact. In addition, the shaft cores of the screw 3 and the speed reducer 9 are adjusted, and the shaft portion 3a of the screw 3 is inserted into the hollow output shaft 10 of the speed reducer 9 and fixed by the set screw 11. Since the assembly is completed simply by coupling to the rotation detector 12, the assembly is extremely simple and there is no need to connect using a shaft coupling, so the number of parts is small and the parts cost and assembly cost can be greatly reduced. ..

Further, even when the screw 3 is pulled out and cleaned at the time of changing raw materials or at the time of maintenance, the hollow drive shaft 10 and the screw 3 can be easily pulled out by releasing the fixation of the screw 3 with the set screw 11. Good workability.

Further, according to the above configuration, the feed port 6 of the cylinder 5 can be easily cleaned by detaching the clamp ring 7 from the feed port 6 and swinging and retracting the swing port 4.

Although the drive motor 13 is arranged on the right side in the raw material discharge direction in the illustrated example, it may be on the left side or above depending on the case.

[0018]

[Effect of the device]

 According to the present invention, as described above, one end of the screw is fitted to the hollow output shaft of the speed reducer, and the drive motor is connected in a direction orthogonal to the hollow output shaft. The length can be shortened to make it compact, and the screw, speed reducer, and rotation detector can be easily assembled, and since it is not necessary to connect them by using a shaft coupling, the number of parts is small, and the parts cost and assembly cost can be reduced. In addition, the screw can be pulled out simply by releasing the fixation of the hollow drive shaft and the screw by the fixing means, and it is possible to perform cleaning and maintenance of the screw with good workability when changing raw materials. To do.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration of a constant quantity supply device according to an embodiment of the present invention.

FIG. 2 is a plan view of the same embodiment.

FIG. 3 is an external perspective view of the same embodiment.

FIG. 4 is a side view showing a schematic configuration of a conventional quantitative supply device.

FIG. 5 is a plan view of a conventional example.

[Explanation of symbols]

 3 Screw 9 Reducer 10 Hollow Output Shaft 11 Set Screw (Fixing Means) 12 Rotation Detector 13 Drive Motor

Claims (1)

[Claims for utility model registration] [Claim 1] A screw type constant quantity supply device in which one end of a screw is driven by a drive motor through a speed reducer, which has a hollow output shaft and a hollow output shaft. One end of the screw is fitted to the hollow output shaft of the speed reducer with the drive motor connected in the orthogonal direction and fixed by the fixing means, and the rotation detector is mounted on the side of the speed reducer with one end of the screw protruding A fixed amount supply device, characterized in that it is connected to one end of the.