JPH0160101B2 - - 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.

[Conventional technology]

As mentioned earlier, as a device for applying high-speed rotation to an object, there is a centrifugal dehydrator used to dehydrate cheese or corn wrapped around textiles such as sliver or thread after dyeing or washing. I can give it to you. 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 direct 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, as a result of the cheese removal operation being performed at the previous stop position (position facing Q point), the spindle 2a facing point P does not have cheese installed when it stops at point P. It remains empty. Therefore, at point P, undehydrated cheese is automatically supplied and fitted onto the spindle 2a from above. Cheese removal at point Q above and P
Cheese feeding at the points is simultaneous and continuous. With this mechanism, automatic supply of cheese,
Automatic ejection takes place. 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 7000 rpm is applied from the motor 7 to the spindle 2a,
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 upward 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 according to the object to which it is attached, and although the figure shows a cylindrical shape to fit with the cylindrical core of the cheese, the shape of the cone shown in Figure 6 has a truncated conical shape. 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 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 is detachable from the outer peripheral surface of the substantially cylindrical shape. A holder for high-speed rotation that integrally rotates a rotating object fitted externally at high speed, the holder having a substantially cylindrical outer peripheral surface,
The structure is such that at least one spiral groove is formed so that the screw direction matches the direction of rotation 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
At least one spiral groove is formed so that the thread direction matches the rotation direction when rotating at high speed, so when a rotating object such as cheese is fitted on the outside and rotated together, the outer periphery of the rotating holder Even though the contact area between the surface and the inner circumferential surface of the rotating object is smaller than that of the conventional one, the rotating object is caused to sink downward by the action of the spiral groove. Therefore, the phenomenon of the object to be rotated jumping out at the same time as the rotation starts, unlike in the prior art, does not occur at all. Also, when the rotation stops, the rotating object tries to continue rotating due to inertia, but it is forced to stop due to the frictional force with the outer circumferential surface of the holder, so as a reaction, the rotating object rotates slightly in the opposite direction. As a result, it moves upward along the spiral groove and is lifted up. Therefore, removal becomes extremely easy.

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 has three spiral grooves 11 on its outer circumferential surface.
a, 11b, and 11c (hereinafter collectively referred to as "groove portions 11") are formed. The spiral of the groove portion 11 ascends from the bottom to the top as shown by the arrow B in accordance with the rotation (arrow A in the figure) when the rotary holder 10 is subjected to high-speed rotation.
In other words, the screw direction matches the rotation direction.

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 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, in conventional rotating holders, if the fitting between the rotating holder and the cone was loose, the cone would come off and fly out when high-speed rotation started, but the rotating holder 10 of the present invention , the groove portion 1
1 has a screw-like action, so when rotation is applied, it works to sink the cone downward and prevent the cone from flying out. This force acts on the cone during its rotation. When the rotation is stopped, the force acts in the opposite direction to the rotation direction due to the reaction of the inertial force that causes the cone to continue rotating. Therefore, the cone is pushed upward like loosening a screw to facilitate removal of 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 at the same time, when the rotation is stopped, the rotary holder 1
The fitting between the 0 and the cone becomes loose naturally, and the cone removal operation becomes extremely easy. 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 spiral grooves constituting 1 is not limited to three, but can be arbitrarily selected. However, it is preferable that the inclination of the groove portion 11 is set at 20 to 70 degrees with respect to the horizontal direction from the viewpoint of sinking and pushing up effects of the cone. The surface area of the groove 11 is 20 to 60% of the total surface area of the outer peripheral surface of the rotary holder 10 (the surface area assuming that the groove 11 is not formed).
% is preferable from the viewpoint of the effect of sinking and pushing up the cone.

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 peripheral surface for fitting of the object to be rotated. . For example, a cylindrical shape as shown in FIG. 2 may be used for mounting the cheese. In this case as well, due to the existence of the spiral groove 12 formed on the outer circumferential surface, a "sinking action" occurs at the start of rotation, and a "pushing action" occurs when the rotation stops.
The same effect as above can be obtained.

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 spiral groove formed on its outer circumferential surface so that the thread direction matches the rotational direction during high-speed rotation, so that the rotating object cannot be externally fitted. When rotating at high speed, the spiral groove prevents the object from falling out when the rotation starts, and when the rotation stops, the object lifts up from the holder, making it easy to take out and greatly improving operability. do. The above-mentioned effect of preventing the object from popping out can be obtained by normally fitting the object into the holder without applying pressure to the holder, so even if the object is repeatedly fitted and removed, the inner circumferential surface for fitting the object and the rotary holder The life of the device can be extended without damaging the outer peripheral surface of the device.

[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... spiral 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 helical groove is formed on the outer circumferential surface of the approximately cylindrical shape so that the screw direction matches the direction of rotation during high-speed rotation. A holder for high-speed rotation featuring 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 holder for high-speed rotation according to claim 1 or 2, wherein the spiral groove has an inclination of 20 to 70 degrees with respect to the horizontal direction. 4. The holder for high-speed rotation according to any one of claims 1 to 3, wherein the surface area of the spiral groove is set to 20 to 60% of the total surface area of the outer peripheral surface of the holder for high-speed rotation. 5. A holder for high-speed rotation according to any one of claims 1 to 4, wherein the constituent members are made of stainless steel.