JPH0641958Y2 - Air supply device for rotating part - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for supplying air pressure via a rotating body which is applied to a winder for winding a band-shaped material such as a film or a thread-shaped material. It is a thing.

(Prior Art) FIG. 4 shows an example of a turret rotating unit in a conventional winder for winding a belt-shaped material such as a film.

In the figure, reference numeral 1 designates bearings arranged in a pair on the left and right and fixed on the frame 2, respectively. A cylindrical housing 3, 3 is rotatably held in each bearing 1, 1 and one end thereof is integrally connected to the turret 4. A winding core 5 is mounted on the turret 4 via core holders 13 and 13a, and has a shaft for rotating the core holder 13 and a bearing (not shown).

The winding core 5 is a core for winding a band-shaped material such as a film,
Sprocket 6 fixed to the shaft end of one core holder 13
It is driven to rotate by the rotation of.

A shaft 9 passes through the inside of the cylinder of the housing 3, and the rotation from the drive source is transmitted to the sprocket 6 by the sprockets 7 and 8 fixed to both ends of the coaxial shaft 9 to rotate the winding core 5. An air passage 9a is bored through the axis of the shaft 9, and rotary seals 11 and 12 are attached to both ends of the air passage 9a.

An air cylinder 10 is attached to the shaft end of the core holder 13a of the turret 4, 4 to which the sprocket 6 is not fixed, and moves the core holder 13a left and right. Air pressure is supplied to the air cylinder 10.
And one rotary seal 11 are connected, and the other rotary seal 12 is connected to a compressed air source (not shown).

The operation is as follows.

(1) The winding core 5 is held by the left and right core holders 13 and 13a. By switching the air supply path of the double-acting air cylinder 10, one core holder 13a is moved to the left and right. The core 5 is removed and attached.

(2) The winding core 5 is rotated via the motor M, which is a drive source for winding the product, the sprocket 8, the shaft 9, and the sprockets 7 and 6.

(3) Two winding cores 5 are mounted on the turret 4, and when the product is fully wound on one winding core 5, the housing 3 and the turret 4 are moved around the shaft 9 by a driving means (not shown). The core 5 is switched by rotating.

(4) When supplying air to the air cylinder 10, the air pressure supplied to the rotary seal 12 from the air supply source is transmitted to the air cylinder 10 through the rotary passage 11 through the air passage 9a provided inside the shaft 9. .

(5) The rotary seals 11 and 12 have bearings, O-rings, etc. inside to supply the air from the rotating body to other parts.

(Problems to be solved by the invention) The core 5 is constantly rotated in a state where the product is wound up, and therefore, the shaft 9 and the rotary parts of the rotary seals 11 and 12 are also required to be constantly rotated. There is a problem that the rotary seals 11 and 12 have a short life and are easily damaged.

In particular, when many air-actuated devices are mounted on the turret 4, the number of air supply ports increases and it becomes necessary to use a complicated and expensive rotary seal.

The present invention has been made to solve these problems, and it is an object of the present invention to provide an air supply device for a rotating part having a simple structure that does not use a rotary seal and can easily cope with an increase in the number of air supply ports. To do.

(Means for Solving the Problems) Therefore, the present invention has a rotating body connected to a turret having a low rotation speed and a low rotation frequency for detachably mounting a winding core for winding a band-shaped material such as a film, In an air supply device of a rotating part having a shaft for constantly rotating through the inside of the rotating body and transmitting rotation to the winding core, a sleeve is supported on the rotating body via an O-ring, and the sleeve is provided. Is provided with an air port communicating with an air supply source, an annular groove communicating with the air port is formed on the inner peripheral surface between the O-rings, and one end of the rotating body is formed into the annular groove. Communication,
The other end is provided with an air passage communicating with an air cylinder attached to the shaft end of a core holder that detachably holds the winding core of the turret, and this is a means for solving the problem. .

(Operation) When the rotational speed of the rotating body is extremely low, the life of the O-ring is longer than that of the rotary seal, and it is cheaper than that of the rotary seal. Using a ring and a sleeve that fits to the same rotating body via an O-ring, air source → sleeve air supply port → sleeve inner groove → rotating body air passage → same number of air supply → supply destination Supply air through the route.

Further, even if the number of air supply ports is increased by the above structure, the structure can be increased by increasing the number of air passages provided in the rotating body and by increasing the air grooves of the sleeve, and can be realized at low cost.

(Example) Hereinafter, a typical example of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment in which the present invention is applied to a winder for a film or the like. FIG. 1 is a front view of a main part of the winder, and FIG. 2 is an AA line in FIG. A sectional view and FIG. 3 are sectional views taken along the line BB. In the figure, the same parts as those in FIG. 4 described above are designated by the same reference numerals.

3'is a cylindrical housing supported by the bearing 1,
Air ports 17,17a, 19,19a open at both ends of the shaft 2
Book air passages 18, 18a are provided. A solid shaft 9'is inserted through the inside of the cylinder of the housing 3 ', and the rotation of the coaxial shaft 9'rotates the winding core of the turret portion (not shown) as in the conventional case. A sleeve 14 is attached to the other end of the housing 3'through an O-ring 15, and the sleeve 14 is fixed to the frame 2 so as not to rotate integrally with the housing 3 '. In the sleeve 14, an air passage is formed between the sleeve 3 and the housing 3 ', and two annular grooves 16 and 21 which communicate with the air openings 17 and 17a respectively of the air passages 18 and 18a provided in the housing 3'. Are provided, and supply ports 20 and 22 connected to an external air supply source are provided so as to communicate with the grooves 16 and 21, respectively.

In the illustrated embodiment, the case where there are two air passages is described, but the number of air passages is not limited to two, and the number of air passages may be provided according to the number.

The O-ring 15 seals air in the annular groove of the sleeve 14 so as not to leak to the outside, and is mounted between the housing 3 ′ and the sleeve 14.

The other air ports 19, 19a of the air passages 18, 18a provided in the housing 3'are connected to the air cylinders 10, 10 shown in FIG. 4, respectively.

The operation is as follows: (1) The air entering from the air ports 20 and 22 passes through the annular grooves 16 and 21 of the sleeve 14, passes through the air ports 17 and 17a of the housing 3 ', and the air passages 18 and 18a, respectively. Air port 19,19a, air cylinder
It flows to 10, 10.

(2) At this time, the O-ring 15 blocks the annular grooves 16 and 21 of the sleeve 14 from the outside air.

(2) Therefore, even if the housing 3'rotates while the sleeve 14 is fixed to the frame 2, the air is not
The 14 air ports 20 and 22 always flow with the air ports 19 and 19a of the housing 3 ', and are not blocked.

In the above embodiment, a plurality of sets of air ports and air passages are provided.
Although they are provided centrally in individual housings, they may be provided separately in the left and right housings.

(Effects of the Invention) As described in detail above, according to the present invention, the sleeve is supported via the O-ring on the rotating body connected to the turret whose rotation speed and rotation frequency are low, and the sleeve is connected to the air supply source. Since an annular groove communicating with the air port is formed on the inner peripheral surface between the O-rings, the problem of damage to the rotary seal or the like is eliminated by not providing the rotary seal as in the conventional case. In addition, the life of the O-ring is not reduced, and even if the number of air supply ports is increased, it can be easily dealt with by simply increasing the supply passages in the same manner. It is not necessary to use a rotary seal, which simplifies the structure and significantly reduces the cost.

[Brief description of drawings]

FIG. 1 is a sectional view of an air supply device in a rotating part showing a typical embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4 is a sectional view showing the structure of a conventional winding machine. Description of the main parts of the figure 3 '…… Housing 14 …… Sleeve (non-rotating part) 15 …… O-ring 16,21 …… annular groove 18,18a …… Air hole 20,22 …… Air port

Claims (1)

[Scope of utility model registration request] 1. A rotating body connected to a turret having a low rotation frequency and a low rotation frequency for detachably mounting a winding core for winding a band-shaped material such as a film, and the rotating body is constantly rotated through the inside of the rotating body. In addition, in the air supply device of the rotating part having the shaft for transmitting the rotation to the winding core, the sleeve is supported on the rotating body via the O-ring, and the sleeve has an air port communicating with the air supply source. An annular groove, which is provided and communicates with the same air port, is formed on the inner circumferential surface between the O-rings, and one end communicates with the annular groove and the other end communicates with the turret winding core inside the rotating body. An air supply device for a rotating part, characterized in that an air passage communicating with an air cylinder attached to a shaft end of a core holder for detachably holding is provided.