JPH019632Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention makes it possible to easily install and remove the synthetic resin crushing tube, which is more easily damaged than the metal crushing tube, in a crushing device such as a ball mill, without damaging its positioning. This invention relates to an attachment mechanism for a synthetic resin crushing tube in a crushing device.

A pulverizer such as a ball mill is used to pulverize, mix, or disperse objects. This type of ball mill consists of a motor, a rotating shaft, a crushing tube, various connecting supports, etc. The crushing tube is operated via the rotating shaft by the drive of the motor, and the crushing tube loaded in the crushing tube is The object is crushed, mixed, or dispersed with the aid of a ball.

By the way, in the recent era of high-level technological products, it is required to obtain high-purity processed products using a grinding device such as a ball mill. For example, in the electronics field, semiconductors, piezoelectric elements, IC circuits, etc. are manufactured in large quantities, and these products often use high-purity ceramic molded products. These high-purity ceramic molded products generally use finely pulverized high-purity ceramic powder, add additives and mix or disperse them, and then
After being molded into the desired shape, it is fired, but due to its nature, the high-purity ceramic powder that is the raw material is not contaminated with inorganic impurities after firing to ensure that it does not adversely affect the performance of each product. is required to be as small as possible.

On the other hand, when an object is processed by, for example, a ball mill, one of the main causes of inorganic impurities being mixed into the object is the crushing tube of the ball mill. This is because the crushing tube serves as a receiver for a large number of crushing balls that violently collide with each other, so that the inner circumferential surface of the crushing tube made of steel, for example, may fall off due to impact or wear out.

Therefore, in order to prevent the contamination of inorganic impurities when obtaining a high-purity processed product using a ball mill, for example, the crushing tube is made of synthetic resin such as polyamide, taking into consideration processing suitability, strength, and chemical resistance. However, such crushing tubes have a weak point in strength compared to metal crushing tubes, and because of this weakness, the total weight of the crushing tube, object, grinding balls, etc. in the operating state is low. Particular attention needs to be paid to the mechanism for attaching the crushing tube to the rotating shaft.

Conventionally, various means have been implemented for the attachment mechanism of the synthetic resin crushing cylinder to the rotating shaft of the crushing device.
Also proposed. For example, one method is to equip the rotating shaft with two end plates, pass a through bolt between the two end plates, and use the through bolt to tighten the two end plates. There is a means for sandwiching a synthetic resin crushing cylinder between two end plates (Japanese Utility Model Publication No. 57-13169).

However, all of these conventional methods are based on the premise that there is no material exposed on the inner circumferential surface of the crushing cylinder (all surfaces that come into contact with objects during processing) that can be a source of inorganic impurities. However, damage to the synthetic resin crushing tube, which has weak points in terms of strength, cannot be sufficiently prevented, and the problem is that it is extremely troublesome to install and remove the crushing tube, including the positioning of the crushing tube.

In view of the above-mentioned circumstances, the present invention provides an improved attachment mechanism for a synthetic resin crushing tube in a crushing device that eliminates the conventional drawbacks.

Hereinafter, the configuration of the present invention will be explained in detail based on the drawings while comparing it with conventional means.

FIG. 1 is a side view illustrating a conventional mounting mechanism for a ball mill. When the motor 11 is driven, the rotating shaft 21 rotates, and the rotating shaft 21 is equipped with two end plates 31a, 31b, and a crusher attached between the two end plates 31a, 31b is rotated. This is a configuration in which the cylinder 41 rotates. The attachment mechanism of the crushing tube 41 consists of two end plates 31a, 31.
b to a plurality of through bolts 51a, 51b, 51c,
51d, .
By tightening 31b, the crushing tube 4 is
1 is attached by pressing.

However, such conventional means have various drawbacks as mentioned above. That is, each time the crushing tube is attached or removed, a plurality of through bolts, which are longer than the crushing tube, must be passed between the two end plates, which is a very troublesome task. In addition, the crushing tube must be positioned so that it rotates around the rotation axis, and this positioning must be maintained even during processing when the total weight of the crushing tube, object, and many crushing balls is added. However, this is also really troublesome and difficult. In addition, in order to maintain such a positioning state during processing, the crushing cylinder must be tightened between the two end plates with considerable pressure, but this pressure load and the above-mentioned total weight during processing are All of the load is applied to the contact portions of the two end plates on both sides of the crushing tube, and as a practical matter, the synthetic resin crushing tube, which has a weak point in terms of strength, is easily damaged.

FIG. 2 is a side view of a ball mill showing one implementation of the present invention, and FIGS. 3 and 4 are sectional views of essential parts thereof, respectively. When the motor 12 is driven, the rotating shaft 22 rotates, and the rotating shaft 22 is equipped with two support plates 32a, 32b, and a crusher attached between the two supporting plates 32a, 32b is rotated. This is a configuration in which the cylinder 42 rotates.
The attachment mechanism of the crushing tube 42 is as follows. That is, the end outer peripheral surface 42 of the crushing cylinder 42
Bands 52a, 52b, 52c, and 52d, each having a substantially L-shaped cross section, are fastened to both sides a and 42b by screws in combination of the band 52a and the band 52b, and the band 52c and the band 52d. In the tightened state, the belt-like band 52a,
The bottom surfaces 53a, .
b, 54c, 54d,..., mainly bolt 6
1a, 61b, 61c, 61d,... and Natsu 62
a, 62b, 62c, 62d, . . . are tightened. Moreover, the belt-like bands 52a, 5
2b, 52c, 52d each side 55a, 55b,
55c, 55d face the support plates 32a, 32b, and are screwed to the support plates 32a, 32b mainly with bolts 63a, . . . and nuts 64a, . Therefore, the crushing tube 42 made of synthetic resin is attached to the support plates 32a and 32b mounted on the rotating shaft 22 so that the belt-like band 5 is sandwiched from both sides thereof.
2a, 52b, 52c, and 52d are removably screwed together, including the face-to-face state at the end outer circumferential surfaces 42a, 42b.

In the present invention, if the belt-shaped band having a substantially L-shaped cross section is formed into a ring shape corresponding to the outer peripheral shape of the crushing cylinder, the number of belt-like bands that are approximately L-shaped in cross section is sufficient to wrap around the outer peripheral surface of both ends of the crushing cylinder, i.e. Two are sufficient (the embodiment shown in the drawings has four). Further, for tightening the belt-shaped band with screws, for example, a bolt may be used.

According to the present invention, the crushing cylinder can be attached and detached by simply manipulating the screw-fastening relationship between the band and the support plate. In addition, the positioning of the crushing tube can be automatically done by simply aligning the screw holes pre-drilled in the belt-shaped band tightened on the outer peripheral surface of its end and the support plate, and screwing both together. Ru. The direct pressure load from the belt-like band on the cylindrical crushing tube is applied evenly from the outer peripheral surface of the end of the cylindrical crushing tube toward the center, so there is no physical strain at all, and the process The total weight load of the crushing tube, the object, and the large number of crushing balls applied inside the crushing tube is eventually dispersed over a wide area to the part of the belt or support plate that the crushing tube faces, which eliminates weak points in terms of strength. Even if the crushing cylinder is made of synthetic resin, it will not be damaged.

[Brief explanation of the drawing]

FIG. 1 is a side view illustrating a conventional mounting mechanism for a ball mill, FIG. 2 is a side view illustrating an embodiment of the present invention for a ball mill, and FIGS. 3 and 4 are sectional views of essential parts thereof. 11, 12... Motor, 21, 22... Rotating shaft, 31a, 31b... End plate, 32a, 32b...
...Support plate, 41, 42...Crushing tube, 42a, 42
b... End outer peripheral surface, 51a, 51b, 51c, 5
1d...Through bolt, 52a, 52b, 52c,
52d... Belt-shaped band, 53a... Bottom surface, 54
a, 54b, 54c, 54d...flange-like part,
55a, 55b, 55c, 55d... side surfaces.

Claims (1)

[Scope of utility model registration request] A mechanism for attaching a synthetic resin crushing tube to the motor-driven rotating shaft of a crushing device, in which belt-shaped bands having a substantially L-shaped cross section are faced and tightened on the outer peripheral surface of both ends of the synthetic resin crushing tube, and the belt-shaped bands are tightened. A mounting mechanism for a synthetic resin crushing tube in a crushing device, characterized in that the synthetic resin crushing tube is removably screwed to a support plate installed on a rotating shaft so as to sandwich the synthetic resin crushing tube from both sides thereof.