JPS5913896B2 - Flour mill rotary crusher pressure adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flour mill, and particularly to a relatively small-sized flour mill suitable for use in general farmers for milling various grains and for milling feed for certain types of birds and animals.

Although various types of flour mills have been proposed in the past, it is difficult to obtain powder with the desired particle size in just one milling process.
There was a drawback that a satisfactory milled state could not be obtained unless the milling process was repeated at least twice.

This invention was invented to address the above problems. Embodiments of the present invention will be described below with reference to the drawings.

The flour mill 1 is placed on a suitable base 2 and mainly consists of a driving device 3, a crushing and conveying section 4, a crushing section 5, and the like.

A relatively small horsepower electric motor is built into the drive device 3, and the screw 1 is connected to the drive shaft of this motor through an appropriate transmission mechanism such as a pulley or a transmission belt.
10.

The crushing conveyance section 4 includes a main cylinder 6 having a pouring port, and a main cylinder 6.
It consists of a screw T71- with a gradually enlarged diameter which is horizontally rotatably installed inside.

The shaft end of the screw 1 is received by the respective rotation support shafts, and a threaded portion 8 having a relatively loose pitch is formed in the main body portion. This threaded portion 8 is constructed by alternately carving protrusions 9 and recesses 10 in a spiral shape, and the surface of the protrusions 9 is further provided along its longitudinal direction with the rotation of the screw 1. Grinding protrusions 11 having a slightly steeper inclination in the direction x and having a substantially chevron-shaped cross section are protruded over the entire length at regular intervals. Note that an appropriate hopper can be detachably attached to the input □.

A sliding portion 5 is provided in the direction of conveyance by the 25 screw T.

This crushing section 5 includes a fixed crushing plate 12, a rotating crushing plate 13, a pressure adjusting device 14, and the like.

The fixed crushing plate 12 is fixedly fixed to the main body 30,
An appropriate number of pressure feeding windows 15 are formed near the center thereof, communicating with the conveyance path by the screw T. Further, a guide groove 12a that facilitates the discharge of grains through the window hole 15
is formed in a spiral shape.

Furthermore, a large number of serrations 12b are radially carved on the inner surface of the fixed grinding plate 12. The Qwoo rotary crushing plate 13 is engaged with the shaft end of the screw 7,
It is installed so that it rotates while being in pressure contact with the fixed grinding plate 12 as the screw 7 rotates.

Furthermore, the guide grooves 13c and serrations 13d are formed in the same manner as in the fixed crushing plate 12. On the other hand, a case 16 having a notch in its lower portion is detachably attached to the periphery of the fixed sliding block 12 so as to cover both sliding blocks 12 and 13 from the outside. Further, a cylindrical portion 17 is formed inwardly at the center of the case 16, and a spring 18 for pressing the rotary crushing plate 13 is accommodated in this cylindrical portion.

The present invention has the above structure and operates as follows.

When a predetermined amount of grain (hereinafter referred to as materials) is placed in the hopper and the drive device 3 is started, the screw 7 rotates.
Correspondingly, the rotary crushing plate 13 also rotates.

As the screw 7 rotates, the material transferred into the main cylinder 6 is subjected to a first crushing action by the chevron-shaped powder sand protrusions 11 formed on the ridge 9 of the screw 7.

Then, they are sequentially forced to be conveyed by the screw 7 and simultaneously crushed one after another by the crushing protrusions 11 until they reach the conveyance end by the screw 7.

The material that has reached the conveyance end and has been primarily crushed for 7t is passed through the pressure feeding window hole 15 formed in the fixed grinding plate 12 to the grinding section constituted by the fixed plate and the rotary grinding plates 12 and 13. It is guided, crushed by the serrations 12b and 13d, subjected to a second crushing action, and discharged from the outlet. At this time, the second sliding force is adjusted by rotating the push screw 20 with a handle to adjust the pressing force of the spring 18.

However, this invention is characterized entirely by the pressure adjustment of the rotary grinding plate 13.

That is, the conveying end side gold polygonal cylinder 7a of the screw 7,
The rotary sliding and crushing plate 13 is loosely fitted into this. As a result, the rotation of the screw 7 causes the rotary crushing plate 13 to also rotate, but depending on the amount and particle size of the material 27 to be conveyed, a large pressure may be generated between the two crushing plates 12 and 13. . This pressure is absorbed by the spring 18, which comes into contact with the fitting groove 13b of the rotating crusher 13, which is a rotating body, and whose other end comes into contact with the case 16, which is a fixed body. It is. Therefore, the spring 18 is supported by a guide ring 24 at the other end, and a pin 22 is provided via a thrust bearing 23. A push screw 20 is then screwed into a screw hole 19 bored in the case 16 from the rear side of the pin 22 to support the pressure of the spring 18. In this case, if the outer end of the pin 22 is brought into contact with the inner diameter 16a of the cylindrical body 17 of the case 16, the movement in the front-rear direction becomes smooth. By turning the handle portion of the push screw 20 to move it back and forth, the repulsive force of the spring 18 can be adjusted, and the crushing force of both crushing plates can also be adjusted. At this time, the nut 21 is tightened to fix it. Furthermore, the presence of the thrust bearing 23 allows the spring 18 to be tensioned easily between the rotating body and the stationary body.
Furthermore, this invention is characterized in that when the polygonal cylindrical body part 7a of the screw 7 and the fitting hole 13a of the rotary grinding plate 13 are fitted together, the fit is made loose, and a gap 26 is provided between the two. .

Since this fitting is not a tight fit, if the amount and particle size of the milling material 27 becomes large, the rotary crushing plate 13 will change according to its volume.
can be tilted, and can respond to the partial increase in volume of the material 27 without stalling the engine or creating extremely high pressure locally, allowing for good crushing action. Since the present invention has the above configuration, the following effects can be expected.

(1) Since the first crushing is performed by the crushing protrusion 11 provided on the screw 7, most of the particle size adjustment is done by this, and the final crushing part 5 is It is only necessary to carry out pulverization, and therefore, a powder with a desired particle size can be obtained by a single milling process.

(2) A guide ring 24 that receives one end of the spring 8 that presses the rotating crusher 13 against the fixed crusher 12
is supported by the case 16 with a thrust bearing 23, so the spring 18 that accompanies the rotation of the rotary crusher 13
The rotation is smooth, which prevents power loss and can be expected to rotate quietly.

The presence of the thrust bearing 23 also allows for smoother adjustment of the crushing pressure by pushing and pulling the push screw 20. (3) Since the rotary crushing plate 13 can be rotated at an angle with respect to the screw 7, there is no strain on the equipment, the power is reduced, and engine stoppage can be prevented.
Efficient flour milling is possible.

(4) Since the screw 7 has a diameter that gradually expands, there is no clogging of the material, and together with the adjustment of the material by the first crushing mentioned above, the effect of transporting the material is further enhanced.

(5) Pressure feeding window 15 communicating with the conveyance path of the screw 7
The presence of the guide grooves 12a and 13c prevents the materials from being rapidly transferred to the secondary crushing section, and the guide grooves 12a and 13c make the flow of materials smoother overall, thus eliminating the drawbacks of the conventional methods described above. It can be expected to have excellent implementation effects in practical terms.

[Brief explanation of the drawing]

Fig. 1 is a side view, Fig. 2 is a front view, Fig. 3 is a front view of the fixed grinding machine, Fig. 4 is a front view of the rotary grinding machine, Fig. 5 is a side view of the screw, and Fig. 6 is a front view of the rotary grinding machine. 7 is a sectional view of the crushing portion, and FIG. 8 is a front view of the crushing plate.

Claims (1)

[Claims] 1. In a flour mill that mills flour by relatively rotating a screw rotatably disposed on a main cylinder and two grinding plates facing the screw, the conveying end side of the screw is a polygonal part, and the polygonal The fitting hole of the rotating sliding crushing plate that fits with the screw is made slightly larger than the cross-sectional shape of the polygonal part to form a gap between the two, and the rotating sliding crushing plate that fits with the screw is inserted into the other sliding crushing plate. 1. A rotary crushing plate pressure adjustment mechanism for a barge making machine, characterized in that a spring is provided to press the spring toward the surface of the barge, and at least one end of the spring is supported by a thrust bearing.