JPH0160102B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used for connecting a high-speed rotation drive shaft and an object to be rotated in a device that gives high-speed rotation to an object, such as a centrifugal dehydrator. This invention relates to a holder for high-speed rotation.

[Prior Art] As mentioned above, a device that applies high-speed rotation to an object is used, for example, to dehydrate cheese or corn wrapped around textiles such as sliver or thread after dyeing or washing. A centrifugal dehydrator can be used. This type of centrifugal dehydrator generally attaches cheese or corn moistened by dyeing or washing to a high-speed rotating drive unit, and rotates it at high speed to remove moisture (dye liquid, washing liquid, etc.) impregnated into the fibers of the cheese etc. etc.), and in recent years, automatic centrifugal dehydrators that can automatically attach and detach cheese, etc., have been widely used. Such an automatic centrifugal dehydrator usually has a circular table 1, as shown in FIG. 3, which is a plan view with the cover removed.
serves as a base, and on a circle concentric with this table 1, a plurality of spindles 2 for mounting cheese, etc. and rotating it for dehydration are provided at equal intervals with their own centers of rotation located. . The rotational drive mechanism of the spindle 2 and its attached devices are shown in FIG. 4, which is a sectional view taken along line AA' in FIG. That is, a high-speed rotation holder (hereinafter abbreviated as "rotation holder") 4 for externally fitting and fixing cheese (including corn) 3 shown by a dashed dotted line is fixed to the tip of the spindle 2, and the above-mentioned A cup-shaped inner case 5 with a hole in the wall that accommodates the cheese 3 is fixed. Furthermore, on the outside of the inner case 5,
A large-diameter cup-shaped outer case 6 is arranged concentrically with the spindle 2 while housing the inner case 5, and is fixed to the table 1 with a support 6a so as not to be affected by the rotation of the spindle 2. Moisture (water droplets) blown outward from the side wall hole of the inner case 5 hits the inner peripheral surface of the cup-shaped outer case 6, and
It flows downward along that surface and is drained to the outside from a bottom drainage section (not shown) of the outer case 6. On the other hand, the lower end of the spindle 2 is directly connected to a motor shaft 7a of a rotational drive motor 7 attached to the back surface of the table 1.
The cheese 3 and inner case 5, which are mounted on a rotating holder 4 at the tip of the spindle 2, are rotated by directly receiving rotational drive from the spindle 2. That is, the spindle 2 is adapted to revolve around a circle B shown in FIG. 3 in accordance with the rotation of the table 1 while rotating on its own axis.

This automatic centrifugal dehydrator is further equipped with functions for automatically supplying and automatically discharging cheese 3. That is, the table 1 is connected to an index unit, etc., and performs intermittent rotation, stopping every time the origin P and the spindle 2 on the table 1 face each other (in this case, every 60° rotation). It's becoming like that. Then, the dehydrated cheese is automatically taken out upward from the spindle 2b that is one position before the spindle 2a facing the point P. On the other hand, when the spindle 2a facing point P stops at the position facing point P as a result of the cheese removal operation being performed at the previous stop position (position facing point Q), It is in an empty state with no cheese attached. Therefore, at a position facing point P, undehydrated cheese is automatically supplied and fitted onto the spindle 2a from above. Above Q
Cheese removal at point P and cheese supply at point P occur simultaneously and continuously. Such a mechanism allows cheese to be automatically supplied and removed. However, the automatic supply and automatic take-out devices are omitted in the figure.

Dehydration in such an automatic centrifugal dehydrator is performed as follows. That is, first, as mentioned above, at the point P stop position of the table 1, the rotation of the spindle 2a is stopped, and the undehydrated cheese 3 is automatically removed from above the spindle 2a with the rotary holder 4 to the rotary holder 4. Fitted and fixed. After the above installation, high speed rotation of about 3000 to 4000 rpm is applied to the spindle 2a from the motor 7,
Accordingly, the mounted cheese 3 rotates integrally with the rotary holder 4, and centrifugal dehydration is started. The rotation of the spindle 2a is maintained even while the table 1 rotates intermittently in the direction of the arrow. Then, at the same time as the spindle 2a stops at a position facing the Q point, or at an appropriate position up to the Q point, for example, the R point, the rotational drive of the spindle 2a is stopped by a physical or electrical method, The dehydrated cheese 3 is automatically taken upwards at point Q to complete a series of dehydration processes. As the rotary holder 4, a polypropylene resin-made rotary holder 4 as shown in FIG. 5 has conventionally been used. However, its shape is selected appropriately depending on the object to which it is attached.The figure shows a cylindrical shape to fit into the cylindrical core of the cheese, but the truncated cone shape of the cone shown in Figure 6 There are various shapes such as a truncated conical shape 4a that fits into the core body.

[Problem that the invention seeks to solve]

However, when performing centrifugal dehydration using the above-mentioned rotating holder, since the rotating holder suddenly rotates at high speed from a stopped state, the attached object (cheese, etc.) to be rotated often comes off from the rotating holder at the same time as rotation starts. have. Therefore, in order to prevent the mounted object from flying out, it has been proposed to externally fit the object onto the rotating holder under pressure in order to strengthen the fit between the mounted object and the rotating holder. However, if this is done, a very strong lifting force is required to remove the object after the rotation is complete, making the removal operation difficult, which is a big problem in both manual and automatic machines. Moreover, with this method, a strong pressing force is applied to the rotary holder when it is installed, and a strong tensile force is applied to the rotary holder when it is removed, resulting in severe wear on the rotary holder and the economical disadvantage of having to replace the rotary holder in a short period of time. arise.

This invention was made in view of the above circumstances, and provides a rotating holder that prevents the attached object from flying out when the high-speed rotation starts, makes it easy to take out the object after the rotation is completed, and causes less wear due to attachment and detachment of the object. Its purpose is to supply

[Means for Solving the Problems] In order to achieve the above object, the rotating holder of the present invention has a substantially cylindrical shape, rotates at high speed by itself with the center axis of the substantially cylindrical shape as the rotation axis, and A holder for high-speed rotation that integrally rotates a rotating object at high speed that is removably fitted onto the outer peripheral surface of the approximately cylindrical shape, the outer peripheral surface of the approximately cylindrical shape having:
The structure is such that at least one groove is formed so as to be substantially parallel to the rotation axis during high-speed rotation.

That is, the rotary holder of the present invention differs from conventional rotary holders in that the outer circumferential surface for fitting has a
Since at least one groove is formed so as to be substantially parallel to the axis of rotation during high-speed rotation, frictional resistance when attaching or removing an object to be rotated such as cheese is reduced. Furthermore, the grooves formed on the outer circumferential surface of the rotary holder of the present invention are approximately parallel to the rotation axis during high-speed rotation, that is, along the attachment/detachment direction of the rotating object, so that the rotating object may not jump out. In order to prevent this, even if the rotating object is mounted with strong pressure, it will not put much load on both.
Similarly, the rotating object can be removed relatively easily without requiring much tensile force. On the other hand, the frictional resistance when rotating objects to be rotated integrally is not reduced so much. That is,
When the rotary holder rotates at high speed, the outer circumferential surface on which no grooves are formed extends from the upper end to the lower end of the rotary holder, and the entire extending portion from the upper end to the lower end contacts the rotating object. Since the rotational force is transmitted (see the arrow in FIG. 1), sufficient frictional resistance is obtained to rotate the object to be rotated as a unit, and the holder does not rotate freely. In addition, the frictional resistance increases as the fit between the rotating holder and the rotating object becomes stronger.
There is an advantage that the object to be rotated can be mounted under pressure to strengthen the fit and provide more sufficient frictional resistance.

Next, the present invention will be explained in detail based on examples.

〔Example〕

FIG. 1 shows an embodiment of the invention.
This rotating holder 10 is attached to the tip of the spindle 2 of a centrifugal dehydrator (see Figs. 3 and 4) used for dehydrating threads, slivers, etc. after dyeing or washing. It has a hollow cylindrical shape around its central axis, and six grooves 11a, 11 are formed on its outer peripheral surface.
b, 11c, . . . (hereinafter collectively referred to as "groove portions 11") are formed. The groove portion 11 extends substantially parallel to the rotation axis (dotted chain line A in the figure) when the rotation holder 10 is subjected to high-speed rotation.

The corn is dehydrated using a centrifugal dehydrator equipped with such a rotary holder 10, for example, in the following manner. That is, first, the rotary holder 10 is externally fitted and fixed under pressure to the tip of the spindle 2 which is directly connected to the motor shaft 7a of the drive motor 7 of the centrifugal dehydrator (see FIG. 4). Then, a cone moistened by dyeing, washing, etc. is removably fitted onto the outer circumferential surface of the rotary holder 10, and by rotating the rotary holder 10 together, the water impregnated in the threads, slivers, etc. of the cone is centrifuged. Dehydrate. In such centrifugal dehydration, since the rotary holder 10 and the cone are firmly fitted under pressure as described above, the cone does not come off and fly out when high-speed rotation starts. When the cone is taken out after the rotation has stopped, the frictional resistance between the cone and the rotary holder 10 is gradually reduced compared to the conventional product due to the presence of the groove 11, making it easier to take out the cone.

In this way, by using this rotary holder 10, it is possible to completely prevent the cone from popping out when the rotation starts, and when the cone is removed after the rotation has stopped, the frictional resistance between the rotary holder 10 and the cone is small, so the cone removal operation is extremely easy. become. Furthermore, since the load when attaching and detaching the cone is reduced, damage to both is also reduced. This is the greatest feature of this invention.

The material of the rotating holder 10 may be a conventionally used hard resin such as polypropylene, but stainless steel is preferable because it will not wear out at all due to high-speed rotation.

Further, in the rotary holder 10, the groove portion 1
The number of grooves constituting 1 is not limited to six, but can be arbitrarily selected. However, the surface area of the groove 11 is the total surface area of the outer peripheral surface of the rotary holder 10 (groove 11
(assuming no formation)
From the viewpoint of effectiveness, it is preferable to set it to 40 to 60%.

Furthermore, although the shape of the rotation holder 10 is a truncated cone shape for mounting a cone, it may be of any shape as long as it matches the shape of the inner circumferential surface for fitting of the object to be rotated. . For example, it may have a cylindrical shape as shown in FIG. 2 for mounting the cheese. In this case as well, the presence of the groove 12 formed on the outer circumferential surface makes it easy to take out the cheese after the rotation has stopped even if it is mounted under pressure at the start of rotation.

Furthermore, the application of the rotating holder of the present invention is not limited to the above-mentioned centrifugal dehydrator, but also to any device such as a centrifugal separator used for chemical analysis, which is characterized in that an object to be rotated is fitted onto a rotating shaft and rotated at high speed. , may be used in any device.

〔Effect of the invention〕

As described above, the rotating holder of the present invention has at least one groove formed on its outer circumferential surface so as to be approximately parallel to the rotational axis during high-speed rotation, so that the rotating object is not pressurized. Even if the holder is fitted and rotated at high speed, the frictional resistance between the object and the holder is small when the object is removed after the rotation has stopped, making it easy to take out and greatly improving operability. Therefore, it is possible to effectively prevent the object from popping out, and at the same time, the frictional resistance between the object and the holder is small even when the object is repeatedly mated to and removed from the holder. It is possible to extend the life of the device without causing damage.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the invention, FIG. 2 is a perspective view showing another embodiment of the invention, and FIG. 3 is a perspective view showing another embodiment of the invention.
The figure is a plan view for explaining the principle of an automatic centrifugal dewatering machine, FIG. 4 is a sectional view taken along the line A-A' in FIG. 3, and FIGS. 5 and 6 are a conventional rotary holder. 10... Rotating holder, 11... Groove, 11a, 1
1b, 11c...Groove.

Claims (1)

[Scope of Claims] 1. A rotating object that has a substantially cylindrical shape, rotates at high speed by itself with the center axis of the substantially cylindrical shape as a rotation axis, and is detachably fitted onto the outer peripheral surface of the substantially cylindrical shape. A holder for high-speed rotation that integrally rotates at high speed, wherein at least one groove is formed on the outer circumferential surface of the approximately cylindrical shape so as to be approximately parallel to the axis of rotation during high-speed rotation. A holder for high speed rotation. 2. The holder for high-speed rotation according to claim 1, wherein the holder for high-speed rotation is a holder for a centrifugal dehydrator. 3. The high-speed rotation holder according to claim 1 or 2, wherein the surface area of the groove is set to 40 to 60% of the total surface area of the outer peripheral surface of the high-speed rotation holder. 4. A holder for high-speed rotation according to any one of claims 1 to 3, wherein the constituent members are made of stainless steel.