JPH0115518Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an elastic tube mounting jig, in particular, which rotates with an elastic rubber tube etc. attached to the chuck, and rotates with one edge perpendicular to the axis of the chuck. This invention relates to an elastic tube mounting jig for attaching and holding a rubber tube or the like when cutting the tube to a predetermined thickness in the same direction.

[Prior art]

Generally, when cutting an elastic rubber tube to obtain a plurality of rubber rings having a predetermined thickness, the rubber tube is inserted into a chuck, and while the chuck is rotated, a single blade is cut in a direction perpendicular to the axis of rotation of the chuck. By feeding the rubber tube, which rotates integrally with the chuck, the rubber tube is cut to a predetermined thickness, thereby obtaining a plurality of rubber rings of a predetermined thickness. There is something like that.

What is described therein is that the chuck is formed into a tapered shape with a diameter larger on the base side by an appropriate length from the base of the chuck, and the rubber tube is rotated by elastically fitting the rubber tube into the tapered part. The feeding angle of the rubber tube is tilted toward the uncut portion, and the attachment angle of the cutting edge is also tilted toward the uncut portion to cut the rubber tube to produce a plurality of rubber rings having a predetermined thickness.

[Problem that the invention attempts to solve]

In this case, the rubber tube is fixed to the chuck and rotates together with the chuck, and when it is simply inserted into the chuck, it rotates together with the rotation of the chuck. Since the rubber tube is fixed to the chuck only by friction between the inner circumferential surface and the outer circumferential surface of the chuck, not only is the fixation of the rubber tube to the chuck uncertain, but it is also difficult to attach and remove it from the chuck. However, it had the disadvantage of extremely poor workability.

This invention eliminates the above-mentioned drawbacks of the conventional ones, ensures the fixation of the rubber tube to the chuck, improves the precision of the dimensions when cutting the rubber tube, and improves the dimensions of each ring after cutting. An elastic tube attachment tool that improves quality by stabilizing the tube, and also improves work efficiency by making it easier to attach to the chuck and remove each ring from the chuck after cutting. The purpose is to provide ingredients.

[Means for solving problems]

This invention has a chuck that has a communication hole with the vacuum pump, is attached to the main shaft rotated by a drive source, and is provided with a protrusion for attaching an elastic tube, and can be inserted into the protrusion of the chuck. When the detachable ring is inserted into the protrusion of the chuck, a closed chamber is formed between the detachable ring and the chuck on the front side in the insertion direction, and a closed chamber is formed between the detachment ring and the chuck on the rear side in the insertion direction. A closed chamber, which is a part of the elastic tube, is formed on the side thereof, and the chuck is further provided with a communication portion that communicates between the communication hole of the main shaft and both of the closed chambers.

[Effect]

In the elastic tube mounting jig of the present invention having the above-mentioned configuration, the detachable ring and the elastic ring inserted into the chuck are vacuum-suctioned toward the main shaft side, so that the mounting on the chuck is maintained firmly, and the vacuum When released, the elastic ring easily detaches from the chuck due to movement of the detachable ring on the chuck.

[Example of idea]

Embodiments of this invention shown in the drawings will be described below.

FIG. 1 shows an embodiment of the elastic tube mounting jig according to this invention, in which a chuck 3 is fixed via a screw 2 to a main shaft 1 which is rotated by a drive source (not shown). When the main shaft 1 rotates, it rotates together with the main shaft 1.

This chuck 3 includes a flange 3a connected to the main shaft 1, and a center portion of the flange 3a connected to the main shaft 1.
and a protruding part 3b protruding to the opposite side, a central cavity 4 is bored extending from the flange part 3a to the center of the protruding part 3b and communicating with the center hole 1a of the main shaft 1. The end of the flange 3a of the cavity 4 is enlarged to form an enlarged opening 4a, and a central cavity is formed at a position adjacent to the flange 3a of the protrusion 3b and at a substantially central position. Communication holes 4b and 4c are respectively provided to communicate the space 4 with the outside.

Further, the detachable ring 5, which has a center hole 5a with a slightly larger diameter than the outer diameter of the protrusion 3b of the chuck 3, has an enlarged opening 5b formed on the chuck 1 side, and this enlarged opening 5b is connected to the chuck. The outer edge 5c of the end can be in close contact with the flange 3a of the chuck 3,
Further, the side opposite to the enlarged opening 5b of the center hole 5a is also enlarged to form an enlarged opening 5d that communicates with the other communication hole 4c of the chuck 3, and the enlarged opening 5d and the outer periphery are connected to each other. end 5e between
is formed into a tapered shape.

Further, the elastic tube 6, which is attached to the outer periphery of the protrusion 3b of the chuck 3 and on the tapered end 5e side of the detachable ring 5, has a gap between its inner diameter and the outer diameter of the protrusion 3b of the chuck 3. 〓 is ±0.05
It is about mm.

Next, the operation of the above will be explained.

First, on the chuck 3 fixed to the main shaft 1,
The detachable ring 5 is inserted and its end surface 5c is brought into close contact with the end surface of the flange 3a of the chuck 3, and then the elastic tube 6 is inserted into the protrusion 3b of the chuck 3.
It is moved in the direction of the arrow and attached so that its end surface is in close contact with the tapered surface 5e of the detachable ring 5.

In this state shown in FIG.
The enlarged openings 5b and 5d of the detachable ring 5 communicate with each other through communication holes 4b and 4c, respectively, and a closed chamber A is formed between one enlarged opening 5b and the collar 3a of the chuck 3. Also, since a closed chamber B is formed between the other enlarged opening 5d, the protrusion 3b of the chuck 3, and the elastic tube 6, when a vacuum pump (not shown) is activated to draw a vacuum, the main shaft The central hole 1a of No. 1 and both closed chambers A and B are in communication with the central cavity 4 and communication holes 4b and 4.
The chuck 3, the detachable ring 5, and the elastic tube 6 are in close contact with each other and are rotated together with the main shaft 1 when the main shaft 1 rotates. be.

In this case, the outer circumferential edge of the end surface of the elastic tube 6 is in close contact with the tapered surface 5e of the detachable ring 5, and the inner circumferential edge of the end surface of the elastic tube 6 is pulled by the action of the vacuum, so that the close contact is prevented. Therefore, there is no fear that the elastic tube 6 will shift relative to the chuck 3 even if force is applied by the cutting edge during cutting of the elastic tube 6 while the main shaft 1 rotates.

In addition, if a vacuum leak occurs during startup of the vacuum pump, it is detected by a vacuum switch (not shown) and the operation of the vacuum pump is thereby stopped. All you have to do is check the insertion state of the detachable ring and elastic tube.

Then, the elastic tube 6 is cut by sending a single blade in a direction perpendicular to the axis of the chuck 3 for each predetermined thickness, and even during this work, the vacuum switch continues to detect vacuum leaks. It is something that exists.

When the cutting is completed, the rotation of the spindle 1 is stopped, and the vacuum pump is also stopped, so all you have to do is move the detachable ring to the right to cut it to the desired thickness and attach it to the protrusion 3b of the chuck 3. It is possible to remove the plurality of elastic tubes.

Further, another embodiment is shown in FIG.
The same members as those in the previous embodiment are given the same numbers and explanations are omitted, but in this embodiment, the detachable ring 5 of the previous embodiment is not provided with the communication hole 4c, and the detachable ring 5 is not provided with the communication hole 4c. A cavity 7 is formed in the axial direction of the outer periphery of the vacuum pump 5, and the closed chamber B and the vacuum pump are connected via this cavity 7. It has a similar effect. In each of the above embodiments, the closed chamber B is formed between the enlarged opening 5d of the detachable ring 5, the protrusion 3b of the chuck 3, and the elastic tube 6 fitted into the protrusion 3b. A hole is formed in the tapered surface 5e of the detachable ring 5, and this hole is communicated with the communication hole 4c or the cavity 7 to form a closed chamber B between the detachable ring 5 and the elastic tube 6. It is okay to do so.

[Effect of idea]

By configuring this idea as described above,
The detachable ring is securely attracted to the chuck,
Moreover, since the elastic tube is reliably attracted and held and does not move relative to the chuck during cutting, it is possible to guarantee high dimensional accuracy in the thickness direction of the elastic ring after cutting, resulting in high quality products. In addition to this, the elastic ring can be removed after cutting by simply moving the detachable ring relative to the chuck, which significantly improves work efficiency. .

[Brief explanation of the drawing]

FIG. 1 is a partially sectional view showing one embodiment of this invention, and FIG. 2 is a partially sectional view showing another embodiment. 1...Main shaft, 2...Screw, 3...Chuck, 3
a...Brim part, 3b...Protrusion part, 4...Central void,
4a, 5b, 5d... Enlarged opening, 4b, 4c...
... Communication hole, 5 ... Detachment ring, 5a ... Center hole,
5c... Outer edge, 5e... End, 6... Elastic tube, 7... Blank space.

Claims (1)

[Scope of utility model registration request] Communication hole 1a with the vacuum pump rotated by the drive source
The chuck 3 is attached to the main shaft 1 having an elastic tube and is provided with a protrusion 3b for attaching an elastic tube, and an annular detachable ring 5 that can be fitted into the protrusion 3b of the chuck 3. Part 3b
When the detachable ring 5 is inserted into the
A closed chamber A is formed between the chuck 3 and the chuck 3 on the front side in the insertion direction, and a closed chamber B, of which the elastic tube 6 forms a part, is formed on the rear side in the insertion direction. , the communication hole 1 of the main shaft 1
1. An elastic tube mounting jig, characterized in that a communicating portion is provided for communicating between A and both of the closed chambers A and B.