JPS5854330Y2 - Film fusing defect detection device for packaging machines - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a film fusing defect detection device for a packaging machine.

Conventionally, film was fed from above and below, the items to be packaged were pushed into the almost vertically stretched portion, the film was wound into a tube, and the double overlapped portions of the film were welded and cut and discharged one after another. It is.

Of course, in a later process, the edges of the film are folded to complete the packaging.

Conventionally, in such devices, when a fusing failure occurs, the packaged object is not separated at the fusing part, and
If the device is operated as it is, double wrapping or the objects to be packaged may proceed diagonally, which may cause mechanical failure.

This invention was devised in view of the above points, and the purpose is to obtain a film fusing failure detection device for a packaging machine that can detect the occurrence of fusing failure and prevent the above-mentioned accidents from occurring. .

An embodiment of this invention will be described based on the drawings.

First, 1 is a film for wrapping an object 2, and this film 1 is pulled out from roll parts 3 and 4 located above and below.

The guide rollers 5 and 6 constitute a gate, and a pusher 7 is provided in front of the guide rollers 5 and 6.

Further, a fusing section 8 and a conveying section 9 are provided behind the guide rollers 5 and 6, and a detecting section 10 is located at a position spaced apart from the fusing section 8 by a predetermined dimension larger than the size of the packaged object in the conveying direction. It is provided.

The detection section 10 includes a light source 11 and a light receiving section 12, and is used to photoelectrically detect the passage of the object 2 to be packaged.

Further, the fusing section 8 includes a fixed die 13 and a film presser 14 having a built-in heater, and the film presser 14 is connected to a drive arm 15.

In such a configuration, before the start of packaging, the film 1 is stretched between guide rollers 5 and 6 as shown in FIG.

The object to be packaged 2 is then pushed between the guide rollers 5 and 6 by the pusher 7, and the object to be packaged 2 is pushed between the guide rollers 5 and 6 by the pusher 7.
is wound into a tube by film 1.

In this state, the film presser 14 descends, presses and welds the double portion of the film 1, connects the upper and lower films 1, and fuses and cuts the wrapped object 2 while maintaining a cylindrical shape. .

Next, the packaged object 2 with the film 1 wound into a cylinder is sent out to the right by the conveying section 9 and detected by the detecting section 10.

Due to this signal from the detection unit 10, although the electric circuit is not shown, the pusher 7 becomes ready to operate again.
Continue to perform similar actions.

In this way, when the fusing operation in the fusing part 8 is working smoothly, the packaged object 2 always passes through the detection part 10, so a detection signal is generated, which causes the pusher 7 and other parts to operate. is repeated, but if an unfused part 16 remains on the film 1 due to the presence of thread waste etc. as shown in FIG.
The object to be packaged 2 is not moved by the conveyance section 9, and therefore the detection section 10 is also not operated, so that the pusher 7 is also kept in an inoperable state.

Therefore, packaging is not performed in an incomplete state, there is no disturbance in the conveyance pitch of the packaged items 2 after the conveyance section 9, and there is no risk of equipment failure.

In the above embodiment, a photoelectric means is used as the detection section 10, but a mechanical means such as a limit switch may also be used.

In this invention, as mentioned above, the detection part of the packaged object is provided at a predetermined distance from the fusing part where the rolled film is cut by fusing, so that if there is an unfused part when the film is melted, it can be detected by the detection part. The detection means can be a simple mechanism that detects the packaged object within a certain period of time after melting, and the device can be stopped in that case, so there is no risk of mechanical failure. It has no effect at all.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIGS. 1 to 3 are side views showing the packaging process, and FIG. 4 is a partial perspective view. 1... Film, 2... Item to be packaged, 8
... Fusing part, 9... Conveying part, 10...
····Detection unit.

Claims (1)

[Scope of utility model registration request] A fusing section is provided for welding and fusing the film after passing the packaged object that is pushed into the stretched film and wound into a tube, and a conveying section is provided for transporting the packaged object from the fusing section, and the conveying section is provided for transporting the packaged object from the fusing section. 1. A film fusing defect detection device for a packaging machine, characterized in that the detection device for the packaged object is provided at a predetermined distance in the direction of the packaged object, which is larger than the size of the packaged object.