JPH0738296Y2 - Rotation control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rotation control device for applying tension to a linear object.

(Prior Art) Generally, when conveying a synthetic fiber yarn or a linear object such as an electric wire while applying a predetermined tension, an apparatus as shown in FIGS. 3 and 4 is used. The apparatus has a pressure fluid supply hole 21a formed in the shaft body 21 along the longitudinal direction of the shaft center, and a plurality of holes 21b opening on the peripheral surface on the same circumference at a plurality of positions at predetermined intervals in the longitudinal direction. The pressure fluid supply passage is formed by making a hole and communicating the hole 21b with the pressure fluid supply hole 21a by the fine hole 21c. And the hole 21b
, A pressing body 22 having an O-ring 23 or the like mounted on the body is movably inserted, and linear shaft guide rollers 24 are rotatably supported by bearings 25 on the shaft body 21 so as to cover the pressing bodies 22. And each roller 24 can be rotated independently. A pressure air supply pipe 26 having a pressure control valve, an electromagnetic switching valve, etc. is connected to the pressure fluid supply hole 21a.

(Problem) By inserting the pressing body 22 in which the hole 21b is formed in the shaft body 21 and the O-ring 23 or the like is mounted as described above, and the pressurized fluid such as compressed air is supplied, FIG. In the configuration in which the pressing body 22 is brought into contact with the inner peripheral surface of the push-out roller 24 by the fluid as shown in, the O-ring 23 and the like move in contact with the inner wall surface of the hole 21b. , And the outer diameter dimensional accuracy when the O-ring 23 and the like are attached, the material, and
Due to the difference in sliding resistance caused by the degree of lubrication, etc., even if the same pressure fluid is applied to each pressing body 22, the pressing force against the roller 24 changes, so that a difference occurs in the rotational resistance of the rollers and uniform tension is applied. There was a problem that I could not do it.

Further, the hole 21b must be shaped so as to communicate with the pressure fluid supply hole 21a and the fine hole 21c in order to support the pressing body at a predetermined position, which complicates the processing and increases the shaft body. There has been a problem that the holes 21b of 21 and the pressing body 22 must be processed with high accuracy, and the number of processing steps increases.

These problems also occur when the chuck mechanism for gripping the bobbin is mounted instead of the roller 24.

(Purpose) An object of the present invention is to provide a rotation control device that facilitates drilling of a shaft.

(Means for Solving Problems) In order to achieve the above-mentioned object, the rotation control device of the present invention is
A shaft body in which a pressure fluid supply hole is formed in the axial center portion, and a plurality of holes communicating with the pressure fluid supply hole and opened in the peripheral surface are formed, and the pressure fluid supply in the hole. An elastic cup inserted into the hole side position, and a pressing body located on the peripheral surface side of the hole and abutting against the elastic cup,
In a rotating device including a roller rotatably mounted on the shaft so as to cover the pressing body, a rod having a polygonal cross-section is fitted in the pressure fluid supply hole to support the elastic cup. It is configured as follows.

(Embodiment) The configuration of one embodiment of the rotation control device of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a shaft body attached to the machine frame 15, and a pressure fluid supply hole 1a is formed along the longitudinal direction of the shaft, and a hole 1b which is opened on the peripheral surface and communicates with the pressure fluid supply hole 1a is formed. There are three holes on the same circumference. The holes 1b are formed at predetermined intervals in the longitudinal direction of the shaft center according to the number of linear objects to be guided. The holes 1b may be provided at least at one location on the same circumference and in the longitudinal direction. A plug 9 is screwed onto the end of the pressure fluid supply hole 1a. Reference numeral 2 denotes a polygonal rod having a hexagonal cross section inserted into the pressure fluid supply hole 1a, and a void 1c formed by the hole 1a and the ridge of the polygonal rod 2 is a passage for the pressure fluid. become. Reference numeral 3 denotes an elastic cup inserted into the hole 1b so that the opening faces the pressure fluid supply hole 1a side.
Alternatively, it is made of an elastic material such as synthetic resin. A pressing member 4 is movably inserted into the hole 1b so as to be located on the bottom portion 3b of the elastic cup 3, and it is necessary to select a material having a small friction resistance and a small change due to temperature. Reference numeral 5 denotes a roller rotatably attached to the shaft body 1 by a bearing 6 so as to cover the pressing body 4, and a groove for guiding the linear object on the peripheral surface.
5a is formed. It is preferable in terms of characteristics that the inner surface of the roller 5 is smooth. Further, in order to maintain the distance between the rollers 5, a spacer 7 is mounted between the bearings on the side where the rollers 5 are adjacent to each other, and a collar 8 is attached to the tip of the shaft body 1 so that the bearing 6 does not move. The above-mentioned rollers 5 are adapted to rotate independently. Therefore, when a fluid having a predetermined pressure is supplied to the pressure fluid supply hole 1a, the body portion 3a of the elastic cup 3 expands in the circumferential direction and the hole 1b.
The inner wall surface of the shaft is sealed so that the compressed air does not leak out of the shaft body 1. Next, the bottom portion 3b of the elastic cup 3 expands in a convex shape to push the pressing body 4 outward in the radial direction of the shaft body 1,
Abuts on the inner peripheral surface of the with a predetermined surface pressure. Therefore, when a rotational force is applied to the roller 5, a predetermined rotational resistance is generated.

In the pressure fluid supply hole 1a described above, a pressure fluid supply pipe 10 having a pressure control valve (not shown), an electromagnetic switching valve, etc.
Are connected and can be operated manually or automatically by a control device or the like.

When a predetermined tension is applied to the linear object by the above-mentioned device, first, a pressure control valve (not shown) is operated so that compressed air having a preset pressure can be supplied. Next, when an electromagnetic switching valve (not shown) is operated to switch the pipeline to supply compressed air to the pressure fluid supply holes 1a, the compressed air is sent to each hole 1b through the void 1c, as shown in FIG. 2-2. As shown, the compressed air does not move the elastic cup 3 in the outer radial direction, and at that position,
Like the diaphragm, the body 3a expands in the circumferential direction and the hole 1b
The inner wall surface of the roller 5 is sealed so that the compressed air does not leak to the outside of the shaft body 1, and the bottom portion 3b expands in a convex shape to push the pressing body 4 in the outer diameter direction of the shaft body 1 and the inner circumference of the roller 5. It comes into contact with the surface with a predetermined surface pressure. In this state, the linear object is wound around the concave groove 5a of the roller 5 a predetermined number of times to run. Then, the pressing body 4 is pressed by the roller 5 to apply a tension to the linear object by the rotational resistance. Since the elastic cup 3 described above is molded by a mold or the like, there is almost no difference in the amount of deformation and the like, and the force for pressing the pressing body 4 against the roller 5 can be made uniform.

Further, the rotation resistance force can be easily adjusted by changing the pressure of the compressed air.

(Effect of the Invention) In the rotation control device of the present invention, the pressure fluid supply hole is formed in the shaft center portion, and a plurality of holes communicating with the pressure fluid supply hole and opening on the peripheral surface are formed. A shaft provided, an elastic cup inserted into the hole at a position on the pressure fluid supply hole side, and a pressing body located on the peripheral surface side of the hole so as to come into contact with the elastic cup. In a rotating device comprising a roller rotatably mounted on the shaft so as to cover the pressing body, a rod having a polygonal cross section is inserted into the pressure fluid supply hole to support the elastic cup. Since the elastic cup and the pressing body are configured so as to be swaged, the shape of the insertion hole for the elastic cup and the pressing body can be simplified, and the shaft body can be easily drilled in a short time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view showing one embodiment of the rotation control device of the present invention. FIG. 2 is an enlarged view of the Z section in FIG. FIG. 3 is a schematic front view showing another embodiment of the conventional rotation control device. FIG. 4 is an enlarged view of the Y section in FIG. 1: Shaft, 2: Polygonal rod, 3: Elastic cup, 4: Pressing body, 5:
Roller, 6: bearing, 7: spacer, 8: collar, 9: stopper,
10: Pressure fluid supply pipe,

Claims (1)

[Scope of utility model registration request] 1. A shaft body in which a pressure fluid supply hole is formed in an axial center portion, and a plurality of holes communicating with the pressure fluid supply hole and opened in a peripheral surface are formed. An elastic cup inserted in the hole on the pressure fluid supply hole side position, a pressing body located on the peripheral surface side of the hole so as to abut the elastic cup, and a cover for covering the pressing body. A rotating device comprising a roller rotatably mounted on the shaft body, wherein a rod having a polygonal cross-section is fitted in the pressure fluid supply hole to support the elastic cup. Rotation control device.