JPH07149311A - Packing device - Google Patents

Abstract

PURPOSE:To prevent troubles caused by winding up a light and fragile article to be packed, when the articles with different superposed quantities are fed by mixture. CONSTITUTION:A packing mechanism 3 is arranged between a rear conveyor 1 and a front conveyor 2 and a switch mechanism 11 detecting the passage or an article A to be packed and a sensor 10 detecting the article A and stopping conveyors 1, 2 is attached on the way of the rear conveyor 1. The switch mechanism 11 is turned on when a heavy article passes through and the packing process is operated by the actuation of sensor 10. When a light article passes through, the switch keeps 'off' and the article to be packed is fed forward without passing through the packing process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing apparatus for band-wrapping objects to be packed, and more particularly, when packing stacked paper sheets by band-wrapping when the stacking amount of paper sheets is small. The present invention relates to a packaging device that prevents a trouble of passing a process and shrinking a paper sheet.

[0002]

2. Description of the Related Art For example, a conventional packing device for bundling and stacking stacked paper sheets such as newspapers in a band is provided between a rear conveyor and a front conveyor for supporting and conveying the stacked paper sheets. The outer periphery of the band is wrapped with a thermoplastic band, and a packing mechanism that welds both ends of this band by heat and pressure is installed, and a sensor that detects the entry of paper sheets is provided in the middle of the rear conveyor, and the sensor is When a paper sheet is detected, both conveyors are stopped, the paper sheet is stopped in a state of straddling both conveyors, then the packing mechanism is activated, and when the outer circumference of the paper sheet is wrapped with a band, both conveyors are activated again and packed. It is designed to send the paper sheet forward.

[0003]

By the way, the paper sheets to be packed may not always have a constant stacking amount and may be supplied in a small stacking amount. When the packing is performed by tightening, there is a problem that a small amount of paper sheets are rolled up by the band winding and cannot be packed in a stacked state.

Therefore, an object of the present invention is to prevent troubles such as when the sheets stacked in a small amount are supplied, the packaging process is skipped, the sheets are curled, and the band is wrapped around the components of the packaging mechanism. An object of the present invention is to provide a packing device capable of preventing the occurrence.

[0005]

In order to solve the above problems, the present invention is provided between a rear conveyor and a front conveyor for supporting and transporting an object to be packaged, and straddling both conveyors. A packaging mechanism is provided that wraps the outer circumference of the object to be packed with a band and packs it.In the middle of the rear conveyor, if a object to be packed is detected, both conveyors are stopped to stop the object to be packed at the position of the packing mechanism. , A switch mechanism that operates only when the object to be packed that passes through it has a predetermined weight or more is installed at the position behind this sensor, and packing is performed only when this switch mechanism operates. It was done.

[0006]

The object to be packed supplied to the receiving end of the rear conveyor is sent forward, and when the object to be packed has a predetermined weight, the switch mechanism is pushed by the object to be packed and turned on. When the object to be packed is detected by the sensor,
Both conveyors are stopped so that the objects to be packed straddle both conveyors, the packing mechanism operates, and the outer circumference of the objects to be packed is wrapped around with a band, and then both conveyors act and the packed objects to be packed Is sent forward by the front conveyor.

In the above packaging, if the object to be packed is lightweight, there is not enough weight to push down the switch mechanism, and the object to be packed passes through to the sensor portion while the switch mechanism is off.

However, when the switch mechanism is off, the sensor does not detect the object to be packed, or the conveyor does not stop even if the sensor detects the object to be packed, so that the object to be packed is sent forward as it is, and the packing process passes. Therefore, it is possible to prevent troubles such as curling the object to be packed and winding the band around the packing mechanism.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in the figure, in the packing apparatus, the take-out side end of the rear conveyor 1 is arranged so that the receiving side end of the front conveyor 2 faces the space between the two conveyors 1 and 2. The packing mechanism 3 is installed in.

A belt conveyor, a chain conveyor and the like are used as the above-mentioned both conveyors 1 and 2 and are driven at a constant speed by a motor.
The object A to be packed, which has been supplied and placed on the receiving side end of the rear conveyor 1, is conveyed forward in the upper horizontal traveling portion.

As the packing mechanism 3, a packing machine used for packing work is used, which is not shown in the drawings, but the two conveyors 1,
A slide plate 5 horizontally supported by the packing machine body 4 at positions below both sides of the gap between the two, and a slide plate 5 that moves back and forth immediately below the gap between the conveyors 1 and 2, and a position below the slide plate 5. However, a heater 6 that moves forward and backward immediately below the gap between the conveyors 1 and 2 is arranged, and a pressurizer 7 that moves up and down is provided directly below the gap below the slide plate 5.

The band arch 8 arranged in the upper part of the gap between the conveyors 1 and 2 is formed in a frame shape with the lower part separated, and the band passage 9 provided over the entire length of the inner peripheral surface can be opened and closed. The lower ends of the slide plate 5
It faces both sides of the.

Although not shown, a first clamp, a second clamp, a band cutting unit, etc. are provided in parallel with the pressurizer 7 so as to move up and down, and the thermoplastic band pulled out from the reel is a slide plate. 5 and the pressurizer 7 to be fed into the band passage 9 of the arch 8 and its tip end
Will be pulled out to the position just below the slide plate 5 from the other end side.

In order to pack the object A to be packed by the packing mechanism 3, the object A to be packed is stopped across both conveyors 1 and 2, and first, the first clamp is raised to slide on the tip side of the band. The band is fixed with the plate 5, the band is separated from the inside of the arch 8 by tightening, and the outer periphery of the object to be packed is tightened, and then the second clamp is lifted and the upper and lower parts of the band are fixed with the slide plate 5, The lower side of the band is cut by the rise of 7, and the heater 6 moves forward and enters between the upper and lower bands, and the heater 6 melts the opposing surfaces of the upper and lower bands by the pressing by the pressurizer 7 and then moves backward. When the melted part of the band is connected by pressurization, the pressurizer 7 and each clamp descend, the slide plate 5 retracts, and the object to be packed comes out of the band and the packing process is completed. However, the items wrapped with the band should be It fed forward by actuation of 1,2.

After this, the slide plate 5 returns to the forward position,
The band is sent into the arch 8 to prepare for the next packaging.

In the middle of the rear conveyor 1, the object A to be packed sent by the conveyor 1 is detected at a position close to the packing mechanism 3, and the conveyors 1 and 2 are stopped to move the object A to be packed. Sensor 1 for stopping so as to straddle between 1
0 and a switch mechanism 11 that operates only when the object A to be packed passing through a position behind the sensor 10 has a predetermined weight or more are installed.

The switch mechanism 11 includes the rear conveyor 1
A lever 12 that is swingable in the moving direction of the object A to be packed and is positioned below the lower surface of the object A to be packed and sent.
The lever 12 is provided with a spring 13 for urging rotational elasticity in a direction in which the lever 12 always stands up toward the rear of the rear conveyor 1, and a switch 14 pushed by the lever 12 is provided on the lower end side of the lever 12. The upper end of the lever 12 projects above the conveying surface of the rear conveyor 1, and the article A to be packaged sent by the rear conveyor 1 contacts the upper end of the lever 12.

The object A to be packed is a stack of paper sheets. When the number of stacked sheets is small, the weight is light, so that the lever 12
The switch 14 remains off.

On the other hand, when the number of stacked sheets is large, the object A to be packed pushes down the lever 12 because the weight is heavy, and the switch 14 released from the pressing is turned on.

The occurrence of the undulating motion of the lever 12 is as follows.
By adjusting the pressure of the spring 13, it can be arbitrarily set according to the weight of the article A to be packed.

When the switch 14 is turned on by the passage of the object A to be packed, the object A to be packed A by the next sensor 10 is turned on.
The switch 14 and the sensor 10 are electrically connected so that both conveyors 1 and 2 are stopped upon detection of.

Therefore, even if the sensor 10 detects the article A to be packed without the switch 14 being turned off, both conveyors 1, 2
Does not stop, and the article A to be packaged is sent forward by the front conveyor 2 without being packaged. That is, a light object to be packed with a small number of stacked sheets is delivered without being packed even if it is supplied onto the rear conveyor 1.

The relationship between the switch 14 and the sensor 10 is that the conveyors 1 and 2 are stopped under the condition that both the switch 14 and the sensor 10 are on, and the sensor 10 detects the object A to be packed when the switch 14 is off. May not be performed.

The packing apparatus of the present invention has the above-mentioned structure, and when the object A to be packed is supplied onto the receiving side end of the rear conveyor 1 while both conveyors 1 and 2 are rotationally traveling, it is moved forward. The to-be-packaged object A sent toward the package passes through the switch mechanism 11 and is detected by the sensor 10.

When the object A to be packed is lightweight, the switch 12 remains off because the lever 12 does not fall and the sensor 1
0 does not stop both conveyors 1 and 2 even if the article A to be packaged is detected, and the article A to be packaged is sent forward by the front conveyor 2 without being packaged.

When the object A to be packed is a stack of a predetermined number of sheets or more, the lever 12 is pushed down and the switch 14 is turned on, and the sensor 10 detects the object A to be packed by this detection signal. Then, both conveyors 1 and 2 are stopped, the article A to be packaged stops across both conveyors 1 and 2, and the packaging mechanism 3 operates after the article A is stopped,
The outer periphery of the object A to be packed, which is located between the conveyors 1 and 1, is wrapped with a band for packing.

When the packing is completed, both conveyors 1 and 2 are rotated and the article A to be packed is sent forward by the front conveyor 2.

[0029]

As described above, according to the present invention, when packing an object to be packed by tightening a band, the lightweight object to be packed is sent forward without being packed,
Ensure that problems such as stacking paper sheets that have a small amount of stacking and weak strength will be rolled up by winding the band, or that the band will not be able to be wound and the band will wind around the components of the packaging mechanism. It can be prevented and the packing work can be performed continuously and efficiently.

[Brief description of drawings]

FIG. 1 is an explanatory view of a packing device according to the present invention.

[Explanation of symbols]

 1 Rear Conveyor 2 Front Conveyor 3 Packing Mechanism 10 Sensor 11 Switch Mechanism 12 Lever 13 Spring 14 Switch

Claims (1)

[Claims] 1. A packing mechanism for supporting an object to be packed and conveying it to the front, between a rear conveyor and a front conveyor, and a packing mechanism for winding the outer circumference of the object to be packed with a band around the conveyor and stopping the packing. Provided in the middle of the rear conveyor, when a packaged object is detected, a sensor that stops both conveyors and stops the packaged object at the position of the packing mechanism, and at a position behind this sensor, the packaged object that passes through has a predetermined value. A packaging device that is installed with a switch mechanism that operates only when the weight is greater than the weight, and that is packed only when the switch mechanism operates.