JPH02233156A - Apparatus for grinding large matter - Google Patents

Abstract

PURPOSE:To perform effective grinding by making it possible to concentrating the whole rotary torque of a screw on the limited part of the thread of the screw. CONSTITUTION:A plurality of screws 11-14 connected to drive means 4 are provided to a frame 2 in a state supported in almost parallel to each other in a rotatable manner. Grinding edges acting in the advance directions of the screws are provided to the threads 11a-14a of the respective screws and at least two screws cooperating with each other are rotated so that the advance directions of the threads of said screws become reverse each other and ground large matter passes through the space between two screws cooperating with each other to fall downwardly. With respect to the pitches of the threads of two screws cooperating with each other, one screw has a constant pitch P1 and the other screw has a constant pitch P2 different from the pitch P1. That is, the whole rotary torque of each screw can be concentrated to the limited part of the thread thereof and effective grinding can be performed.

Description

[Detailed Description of the Invention] A. INDUSTRIAL APPLICATION FIELD The present invention relates to a coarse material crushing device. B. The following was disclosed in the conventional technical patent application publication No. 58-500890. That is, it includes a plurality of screws that are rotatably supported substantially parallel to each other in one frame and connected to a drive means, and the screw thread of each screw is provided with a crushing cutting edge that operates in the feeding direction of the screws. Then, at least two cooperating screws are rotated so that the advancing directions of their threads are opposite to each other, and the crushed coarse material passes through the space between the two cooperating screws. It was designed so that it would fall downward. As another example, JP-A-63
In the one disclosed in Japanese Patent No. 205162, the screw is reversed when a load exceeding a predetermined crushing capacity is applied.

C. Problems to be Solved by the Invention However, in the former case, when the cutting edge of the screw thread is shearing a large object, a load is applied to all threads of each screw at the same time, easily resulting in an overload condition. Moreover, in the latter case, the overload safety switch of the motor is operated every time, causing the screw to reverse, which has the disadvantage that the amount of crushing is reduced accordingly.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a device for crushing large objects that can shear a large object within a limited range of the full thread of the screw.

D. Means for Solving the Problems In order to achieve this object, the structure of the present invention is as follows. A first arrangement includes a plurality of screws rotatably supported substantially parallel to one another on the frame and coupled to a drive means, the threads of each screw being provided with a crushing cutting edge acting in the direction of travel thereof; The cooperating screws of the book are rotated so that their threads advance in opposite directions, and the crushed coarse material passes through the space between the two cooperating screws and falls downward. In the apparatus for crushing coarse materials having an elliptical shape such that
The pitch of the threads of the screws that cooperate with each other is that one screw has a constant pitch P, and the other screw has a constant pitch P2 that is different from the pitch P. A second arrangement includes a plurality of screws rotatably supported substantially parallel to one another on the frame and coupled to a drive means, the threads of each screw being provided with a crushing cutting edge acting in the direction of travel thereof; The cooperating screws of the book are rotated so that their threads advance in opposite directions, and the crushed coarse material passes through the space between the two cooperating screws and falls downward. In the coarse material crushing apparatus configured to be. A third arrangement includes a plurality of screws rotatably supported substantially parallel to one another on the frame and coupled to a drive means, the threads of each screw being provided with a crushing cutting edge acting in the direction of travel thereof; The cooperating screws of the book are rotated so that their traveling directions are opposite to each other, so that the crushed coarse materials pass through the space between the two cooperating screws and fall downward. In the constructed apparatus for crushing coarse materials, the pitches of the threads of the two mutually cooperating screws are such that one screw has an irregular pitch P, and the other screw has an irregular pitch P4. A fourth configuration includes a plurality of upper screws that are rotatably supported to the frame in substantially parallel to each other and on substantially the same horizontal plane and coupled to a driving means, and a plurality of upper screws that are arranged below a boundary between the two mutually cooperating upper screws. one or more lower screws rotatably supported substantially parallel to said lower screws and coupled to a drive means, each said screw having a thread provided with a crushing cutting edge acting in its direction of travel, said at least two lower screws cooperating with each other; The screws are rotated so that the threads of the screws advance in directions opposite to each other, and the crushed coarse material passes through the space between the two cooperating screws and falls downward. In the coarse material crushing apparatus, the above-mentioned 2
The pitches of the threads of the upper screws that cooperate with each other are different from each other, and they are also different from the pitch of the threads of the lower screw that cooperates with one of the upper screws. E. Effect When each screw rotates, the parts of the threads of the cooperating screws that are closest to each other move from one side to the other in the axial direction of the screw, and from the other to one side,
This is repeated and the coarse material is sheared off in some limited part of the full thread of the screw.F. EXAMPLE Hereinafter, the implementation of the present invention will be explained based on an example shown in the drawings. In FIG. 1.2, a frame 2, which is rectangular in plan view, is placed and fixed on a stand 1. Four screws 10 (1st-11th, 2nd-12th, 3rd-13th, 3rd-13th,
No. 4-14) are rotatably supported through bearings 3 substantially parallel to each other. A motor 4, which is a driving means, is directly connected to each screw and is fixed to a stand 1. When a load exceeding the specified crushing capacity is applied, the screw is reversed by the torque limiter. the screw 1112,
13.14 threads 1 1 a, 1 2 a, 1 3 a,
14a has a crushing cutting edge [1lb
, 12b- (Figures 5a and 5b)] are provided. The two mutually cooperating screws 11, 12 and 13, 14 are rotated by the motor 4 so that the threads of the screws advance in opposite directions to each other, and the screws are rotated by the motor 4 so that coarse particles are formed between the crushing cutting edges. Breaks objects by crushing, shearing, and bending. The crushed coarse materials pass through the space between the two cooperating screws, fall through the lower discharge opening 6, and are discharged onto a conveyor or the like. Bulky materials are introduced from above through funnel 5. Now, here is the fourth
As shown in the figure, in the first configuration, the threads (
lla, 12a) and (13a, 14a) at a constant pitch P1 in one screw 11.13.
, and the other screw 12.14 connects the said contact P. has a constant pitch P, which is different from . Therefore, when each screw rotates, in each pair of mutually cooperating screws (11.12) and (13.14),
Screw thread (1 1 a.1 2a> and (13a, 14
The one part closest to each other in a) moves from one side to the other in the axial direction of the screw, and from the other to the other. , and this is repeated. Then, coarse objects are sheared and crushed at one limited location on the entire thread of the screw. In addition, as shown in Fig. 3, in the second configuration, the two mutually cooperating screws (11.12) and (13.14)
has a constant pitch P1 on one screw 11.13 and a constant pitch P1 on the other screw 12.1.
4 has an indefinite pitch P. Therefore, when each screw rotates, in each pair of mutually cooperating screws (11.12) and (13.14>,
A plurality of parts (less than the number of thread pitches) of the threads (lla, 12a) and (13a, 14a) that are closest to each other move from one side to the other in the axial direction of the screw, and from the other to one side. , this is repeated. Then, the coarse particles are sheared and crushed at several limited locations along the entire thread of the screw. In the third configuration, the two cooperating screws (11
．． 12> and (13.14) have an irregular pitch P3 on one screw 11.13 and an irregular pitch P on the other screw 12.14 (not shown). Therefore, when each screw rotates, the screws (11.12>. and (13.1
In each set of 4), the screw thread (1 1 a.1 2 a
) and (13a, 14a) that are closest to each other (a number smaller than the number of thread pitches) move from one side to the other in the axial direction of the screw, and from the other to one side, and this is repeated. Then, the coarse particles are sheared and crushed at several limited locations along the entire thread of the screw. In the fourth configuration, as shown in FIGS. 6 and 7, the frame 2 is rotatably supported substantially parallel to each other and on substantially the same horizontal plane;
A plurality of (2 shown) upper screws 1 coupled to drive means
5.16, and one lower screw 21 is provided which is rotatably supported below and substantially parallel to the boundary of the two cooperating upper screws and connected to a drive means. The thread of each screw is provided with a crushing cutting edge that operates in the direction of movement. Therefore, the thread pitches (constant or irregular) of the two mutually cooperating upper screws 14 and 15 are different from each other,
It also differs from the thread pitch P4 (constant or indeterminate) of the lower screw 21 that cooperates with any one of these upper screws. The present invention is not limited to the embodiments and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims. G. Effects of the Invention With the configuration of the present invention, the entire rotational torque of the screw can be concentrated in a limited portion of the thread, so that effective crushing can be performed. In addition, since the motor is less likely to be overloaded, there is less counter-rotation of the screw, and the amount of crushing increases significantly.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2 is a horizontal sectional view, Figs. 3 and 4 are plan views of main parts, Figs. Figure 6 is a front view of the lower screw.
FIG. 7 is a longitudinal sectional view of an embodiment of the fourth configuration. 1...stand, 2...frame, 3...bearing, 4...motor, 5...funnel, 6...discharge opening 1
0...Screw 11...First screw 11a...Screw thread 12...Second screw 12a...Screw thread 13...Third screw 13a...Screw thread 14...Fourth Screw 14a...Screw thread 15.16...Upper screw 21...Lower screw

Claims (4)

[Claims] (1) A plurality of screws are rotatably supported on the frame substantially parallel to each other and connected to a driving means, the threads of each of the screws are provided with a crushing cutting edge that operates in the direction of movement thereof, and the at least two The mutually cooperating screws are rotated so that the advancing directions of their threads are opposite to each other, so that the crushed coarse material passes through the space between the two mutually cooperating screws and falls downward. In the apparatus for crushing coarse materials, the thread pitch of the two mutually cooperating screws is such that one screw has a constant pitch P_1 and the other screw has a constant pitch P_2 different from the pitch P_1.
A coarse material crushing device characterized by having: (2) A plurality of screws are rotatably supported on the frame substantially parallel to each other and connected to a drive means, the threads of each screw are provided with a crushing cutting edge that operates in the direction of movement thereof, and the at least two The mutually cooperating screws are rotated so that the advancing directions of their threads are opposite to each other, so that the crushed coarse material passes through the space between the two mutually cooperating screws and falls downward. In the apparatus for crushing coarse materials configured in Equipment for crushing coarse materials. (3) a plurality of screws are rotatably supported substantially parallel to each other on the frame and connected to a drive stage, the threads of each screw being provided with a crushing cutting edge that operates in the direction of movement of the screw; The cooperating screws are rotated so that their traveling directions are opposite to each other, and the crushed coarse material passes through the space between the two cooperating screws and falls downward. In the apparatus for crushing large objects, the thread pitch of the two mutually cooperating screws is characterized in that one screw has an irregular pitch P_3 and the other screw has an irregular pitch P_4. Crushing equipment. (4) a plurality of upper screws rotatably supported to the frame on substantially the same horizontal plane and substantially parallel to each other, and coupled to the drive means; and a plurality of upper screws that are substantially parallel to each other and connected to the frame below the boundary between the two mutually cooperating upper screws. one or more lower screws rotatably supported in parallel and coupled to a drive means, each screw thread having a crushing cutting edge acting in its direction of travel, the at least two cooperating screws comprising: The coarse material is rotated so that the advancing directions of the screw threads are opposite to each other, and the crushed coarse material passes through the space between the two cooperating screws and falls downward. In the object crushing device, the thread pitch of the two upper screws that cooperate with each other is different from each other, and also different from the pitch of the thread of the lower screw that cooperates with one of the upper screws. A coarse material crushing device featuring: