JPH0123931Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bag heat sealing device that can perform a bag heating operation while maintaining a good packaging form. It is.

A pair of clamping members 11 and 13 capable of clamping and supporting both left and right ends of the bag opening with the bag opening of the bag 1 made of synthetic resin such as polyethylene in an upwardly open state; A receiving plate 2 provided so as to be movable forward and backward toward the bag opening, a heater plate 3 provided movable forward and backward with the bag mouth facing the other side of the bag opening, and a heater plate 3 disposed on one side of the bag. a detection switch 4 which heats the heater plate only when the fruit bag contains stuffing; and a shaker located opposite the detection switch 4 and capable of holding the other side of the fruit bag in contact with it. This is a bag heater device consisting of a stopper 32.

It will be explained in more detail.

A bag support section that supports the bag 1 shown in this figure in an open state will be described.

The rear portions of a pair of opening/closing arms 6 which swing horizontally to open and close each other are pivotally protrudingly provided on the rotary table 5 through a center pin 7, and connected to each opening/closing arm 6 by a connecting pin 8, so that the opening/closing arms 6 are operated to open and close. The link arms 9 are pivotally connected, and an opening spring 10 that biases the opening/closing arm 6 to open is stretched between one opening/closing arm 6 and the adjacent opening/closing arm 6 in the next row, and is fixed to the tip of the opening/closing arm 6. A side clamping member 11 is formed, and the middle of the swinging side clamping member 13 that clamps and swings is pivotally connected to this clamping member 11 by a starting point pin 12, and the outer end of this pivoting member 13 is A clamping cylinder 15 having a piston rod biased in the projecting direction by a release spring 14 is installed between the opening and closing arm 6 and the rear end thereof.

That is, both corners of the bag mouth part of the bag 1 are connected to the clamping cylinder 1.
The clamping member 13 and the clamping member 11 are clamped by the force of 5, and when the air in the clamping cylinder 15 is released, the piston rod is projected by the release spring 14, and the clamping member 13 is rotated around the fulcrum pin 12. When the bag is swung, the bag 1 is released and removed, and the bag 1 is suspended and supported in an open state.

In addition, this figure shows a heat seal base 17 on the machine base 16.
A guide post 19 is set upright on this heat seal base 17, and a vertical slide plate 21 that is moved vertically by a degassing/returning cylinder 20 is provided on this guide post 19. A deaeration nozzle 23 that is inserted into the bag 1 and sucks air into the bag 1 and deaerates the air is installed vertically at the tip of the mounting arm 22 attached to the bag 21, and a heat sealing cylinder 24 is installed on the heat sealing base 17. A heater plate 3 having a heater body 25 stretched on the front surface is connected to the cylinder rod of this heat sealing cylinder 24 in a non-rotating state by a guide shaft 26, and a straightening cylinder 27 is provided directly below the heat sealing cylinder 24. , this correction cylinder 27
The straightening plate 28 located below the heat-sealed portion is connected to the cylinder rod of the heater plate 28 by a guide shaft 29 in a rotation-stopping state, while the heater plate 3 and the straightening plate 28
A receiving plate 2 is provided opposite to the receiving plate 2, and this receiving plate 2 is connected to the cylinder rod of a receiving cylinder 30 provided on the machine base 16, so that the receiving plate 2 is prevented from rotating by a guide shaft 31. A detection switch 4 which is movable forward and backward and capable of contacting one side of the fruit bag containing the stuffing inside the bag is provided on the support 18, and the detection switch 4 is placed opposite to the detection switch 4 to contact the other side of the fruit bag. Steady stop body 3 installed with a retainable steel strip plate in a flat Ω shape
2 is attached to the machine base 16.

In this case, the detection rod 33 of the detection switch 4 is extended and protruded along the transfer path of the bag 1, and when an empty bag is transferred, the empty bag is pushed away to prevent the detection switch 4 from turning on, and when the actual bag is transferred, the detection rod 33 of the detection switch 4 is extended. When this happens, the detection rod 33 is pushed and the detection switch 4 is turned on.

Next, the operation of this embodiment will be explained.

The fruit bag supported in an open state and transferred by the rotary table 5 is detected by the detection switch 4 to be a fruit bag.

Then, the degassing nozzle 23 is lowered and inserted into the bag 1 by the degassing/returning cylinder 20, the opening/closing arm 6 is swung open to close the bag opening, and the degassing nozzle 2 is inserted into the bag 1.
3, the air inside the bag is sucked in and deaerated for a predetermined period of time.

Then, the deaeration nozzle 23 is removed and raised, and at the same time, the receiving cylinder 30 and the correcting cylinder 27 move the receiving plate 2 and the correcting plate 28 forward.

The lower part of the heat-sealing portion is clamped between these two parts, and in this state, the heat-sealing cylinder 24
The heater plate 3 is moved forward and heat-seals the bag opening.

After the heat sealing time has elapsed, the abutment plate 2, heater plate 3, and straightening plate 28 move back and return to their original positions.

Then, the bag 1 is taken out and transferred by the rotary table 5, and a new bag 1 is supplied and transferred.

By repeating this operation, the bags 1 will be heat-sealed one after another.

Therefore, a detection switch 4 is provided on at least one side of the bag 1 to detect a change in form between a fruit bag and an empty bag, and only when the detection switch 4 detects a fruit bag, the receiving plate 2 and the heater are switched off. By configuring the plate 3 to perform the bag heat sealing operation, the heat sealing operation performed by the receiving plate 2 and the heater plate 3 is activated only when the detection switch 4 detects a fruit bag. That is, filling material a
When the stuffed material a is packed into the bag 1, a series of heat-sealing operations are performed, and conversely, when the stuffed material a is an empty bag that is not packed into the bag 1, the bag 1 is filled as is.
Since the bag 1 is transferred to the next process, the bag 1 can be reused, which is extremely economical.

Furthermore, the time can be shortened to the extent that the heat sealing operation is omitted, and the speed can be increased accordingly.

Further, when the detection rod 33 of the detection switch 4 comes into contact with one side of the fruit bag and is pushed, the fruit bag will also be pushed back by the detection rod 33, but at this time, the steadying body 32 will be pressed against the other side of the fruit bag. By contacting the side surface and holding the bag in position, it is possible to suppress the downward swinging movement of the bag, and it is possible to keep the operation of the detection switch 4 stable, thereby improving the heat sealing position and posture. can be stabilized and the packaging form can be improved.

Since the present invention is configured as described above, when the detection switch comes into contact with one side of the fruit bag and is pushed, the fruit bag will also be pushed back, but at this time, the steadying body will move to the other side of the fruit bag. The bag is held in position while suppressing the swinging movement of the fruit bag by contacting with the bag, thereby improving the heat sealing operation, stabilizing the heat sealing position and posture, and making it possible to heat seal the packaging form well.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall side view, FIG. 2 is a partial plan view, and FIG. 3 is a plan view of the main part. 1... bag, 2... receiving plate, 3... heater plate,
4...detection switch, 11, 13... clamping member,
32... Steady rest body.

Claims (1)

[Scope of utility model registration request] A pair of clamping members capable of clamping and supporting both left and right ends of the bag opening of a bag made of synthetic resin such as polyethylene with the bag opening facing upward; a receiving plate provided so as to be movable forward and backward toward the bag; a heater plate provided movable forward and backward with the bag mouth facing the other side of the bag; A bag heat seal consisting of a detection switch that heats the heater plate only when a fruit bag is filled with stuffing, and a steadying body that is located opposite to the detection switch and can hold the other side of the fruit bag in contact with it. Device.