JPH0311971B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] Transfer drums are known in packaging devices and other devices that involve the movement of articles, which attract the articles being sent one by one and transfer them to the next process.

For example, as shown in Figure 2, a straw or a spoon is made into a band-shaped continuous package A', and a cutter B is
The cut packages A are cut into individual packages A, and the cut packages A are adsorbed and transferred by a transfer drum C, and the packages A are applied to the surface of a food and beverage packaging container D, which has been coated with adhesive in advance. Adhesion is achieved by bringing them into contact with each other.

The present invention relates to a transfer drum for suction-holding and rotationally transferring articles that are generally non-air permeable and capable of being sucked.

[Conventional technology]

In conventional transfer drums of this type, a plurality of suction pipes and suction pads provided on the rotating body are usually connected to one vacuum source.

Various methods of connection have been devised to prevent air leakage.

[Problem to be solved by the invention]

Conventional transfer drums had to maintain a high degree of airtightness in order to provide each intake pipe and suction pad with a suction force above a certain level. In other words, even a small amount of air leakage will cause the vacuum pressure to drop significantly, so it is necessary to provide passages and joints with high airtightness to the rotating mechanism. Furthermore, air leakage from one intake pipe greatly affects other intake pipes, and it is necessary to completely close all intake pipes other than those in suction operation. This results in a complicated structure including moving parts, which may cause malfunctions, and has the disadvantage that efficiency is extremely poor if the intake pipe is left open for purposes other than suction operation.

In view of these points, the present invention provides a vacuum suction device for a transfer drum that can obtain stable vacuum pressure with less influence of air leakage, has as few moving parts as possible, and reduces the possibility of failure. The purpose is to

[Means to solve the problem]

The present invention uses a compressed air source that is relatively resistant to pressure changes due to air leaks, and a bench lily tube that can create a vacuum (negative pressure) state with the compressed air.

A plurality of intake pipes are arranged on the outer surface, and a cylindrical exhaust pipe supports a rotating body that attracts and rotationally transports articles. The interior of this rotating body is divided into a vacant chamber and an airtight pressure chamber by a partition wall, and a plurality of bench lily pipes corresponding to the intake pipe are arranged in the cavity, and the vacuum generation circuit is connected to the intake pipe. communicate. A pressure pipe connected to a compressed air source is arranged on the center line of the exhaust pipe, and this pressure pipe is opened to the pressure chamber, while the pressure circuit of the bench lily pipe and the pressure chamber are communicated, and the pressure circuit of the bench lily pipe is vented. The empty chamber from which the gas is released is communicated with the exhaust pipe.

[Effect]

Compressed air supplied from a high pressure air source such as a compressor is sent to the pressure chamber through pressure pipes.
The compressed air sent to the pressure chamber passes through the pressure circuit of the bench lily pipe and is discharged into the cavity, and the air discharged into the cavity is discharged to the outside of the machine through the cylindrical exhaust pipe.

The vacuum pressure generated in the bench lily tube by the passage of compressed air produces an adsorption function in the intake pipe because the vacuum generating circuit is in communication with the intake pipe.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a vacuum suction device for a transfer drum of the present invention will be described based on the accompanying drawings.

A rotating body 1 that is rotationally driven has both ends of a cylindrical body connected to a lid body 2.
and 3 to form a hollow shape, and the inside thereof is divided by a partition wall 4 into a base cavity 5 and a front airtight pressure chamber 6. The exhaust pipe 7 passes through the lid body 3 and the partition wall 4 at the base of the rotating body 1, and its tip is fitted into the through hole of the partition wall 4 in an airtight manner, and a plug-like member is attached to the open end of the tip. and is separated from a pressure chamber 6. The exhaust pipe 7 and the rotating body 1 are fixed at a portion of the cover body 3 on the base side of the rotating body. That is, the exhaust pipe 7 also serves as a drive shaft for the rotating body 1. Further, a plurality of ventilation holes 9, 9 are formed in a part of the exhaust pipe 7, so that the empty space 5 and the inside of the exhaust pipe 7 are communicated with each other.

A pressure pipe 8 connected to a compressed air source is arranged on the center line of the exhaust pipe 7, and the tip of this pressure pipe passes through a plug-shaped member attached to the tip of the exhaust pipe and opens into the pressure chamber 6. I'm letting you do it. Further, a plurality of bench lily pipes 10, 10 are arranged in the empty space 5, and the vacuum generating circuit 10a thereof is communicated with an intake pipe 11 projecting to the outside. Pressure circuit 10b of bench lily tube 10
is communicated with the pressure chamber 6 through a connecting pipe 12 penetrating the partition wall 4 .

In the illustrated embodiment described above, the exhaust pipe 7 and the rotating body 1 are fixed, and the exhaust pipe 7 also serves as the drive shaft of the rotating body. A separate fixed and rotary drive may also be provided. Further, although the exhaust pipe 7 is fixed to the rotating body 1 by passing through the partition wall 4, the end of the exhaust pipe 7 may be opened to the empty chamber 5.

To explain the operation of the transfer drum according to the illustrated embodiment, high-pressure air supplied from a compressor (not shown) or other high-pressure air source passes through the pressure pipe 8 and fills the pressure chamber 6 . The high pressure air is supplied from the pressure chamber 6 to the plurality of bench lily pipes through the connecting pipe 12, creating a constant and stable vacuum pressure in the intake pipe 11, and the high pressure air is supplied from the exhaust hole 13 of the bench lily pipe 10. It is discharged into the empty chamber 5, passes through the ventilation hole 9, and is discharged from the exhaust pipe 7 to the outside of the machine. That is, the high-pressure air discharged into the exhaust pipe is discharged into the atmosphere from the pipe end, etc., where there is no risk of affecting the function of the rotating body.

If the pressure chamber 6 is made to have as large a volume as possible, it will function as a tank, and the amount of air supplied or consumed due to reasons such as a pulsating high-pressure air source or air leaks can be reduced. Even if there are fluctuations, air at a relatively stable pressure can be supplied to each vent lily tube 11.

〔Effect of the invention〕

According to the vacuum suction device for the transfer drum of the present invention, relatively stable vacuum suction force can be obtained for a plurality of intake pipes, regardless of air leakage or operation of other intake pipes.

In a conventional suction device that uses a vacuum source, when some of the plurality of intake pipes become open, the suction force of the other intake pipes is significantly affected. In order to avoid this, if a valve mechanism is provided in the intake pipe that is in the open state, the structure will be complicated and may cause failure. In addition, if the vacuum pump is left open, it is necessary to use a vacuum pump with a large capacity. According to the present invention, the structure is simple, the possibility of failure is low, high-pressure air can be obtained relatively easily using a compressor, etc., and the running cost of the entire device is low.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the vacuum suction device in the transfer drum of the present invention, in which Fig. 1 is a front view showing an example of the use of the transfer drum, Fig. 2 is a longitudinal sectional view of the transfer drum, and Fig. FIG. 2 is a sectional view taken along the - line in FIG. 2; 1... Rotating body, 2, 3... Lid body, 4... Partition wall,
5...Empty chamber, 6...Pressure chamber, 7...Exhaust pipe, 8...
... Pressure pipe, 9 ... Ventilation hole, 10 ... Bench lily pipe, 10a ... Vacuum generation circuit, 10b ... Pressure circuit, 11 ... Intake pipe, 12 ... Connection pipe, 13 ...
Exhaust hole, A...Package, B...Katsu, C...Transfer drum, D...Packaging container.

Claims (1)

[Claims] 1 A hollow rotating body 1 is supported by a cylindrical exhaust pipe 7, and the interior of the rotating body 1 is divided by a partition wall 4 into a cavity 5 and an airtight pressure chamber 6, and the cavity 5 is A plurality of bench lily pipes 10 are arranged to form a bench lily pipe 1.
0 vacuum generating circuit 10a is communicated with an intake pipe 11 protruding from the outer peripheral surface of the rotating body, and a pressure pipe 8 connected to a compressed air source is arranged on the center line of the exhaust pipe 7. is opened to the pressure chamber 6, the pressure circuit 10b of the bench lily pipe is communicated with the pressure chamber 6, and the empty chamber 5 from which exhaust gas of the bench lily pipe is discharged is communicated with the exhaust pipe 7. Vacuum suction device in drum.