JPS58112934A - Method and device for bundling cover cutting thread of packing vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for tying cutting threads for cutting the lids of packaging containers (hereinafter referred to as packs) for packaging eggs, food, fruits, etc.

The pack referred to in the present invention is a vacuum-formed thermoplastic film, such as a hard PVC film, in which the storage compartment and lid are integrally connected at the center of the left and right sides, and the pack is folded at the center of the body. The edge of the bent lid and the edge of the storage area are sealed with spot thermal separation or adhesive tape.

For example, in a pack for eggs, as shown in FIGS. 1 and 2, a recess 5 is formed in the lid 2 in correspondence with a storage section 1 formed with recesses 5tL for storing a plurality of eggs in one or three rows. The package is folded along the folding line 3 of the central connecting part.

In recent years, an incision thread Y is tied in tension around the central connecting part of the egg packaging pack P shown in FIG. Packs in which the edges and folds are cut so as to be cut along the central joint fold line 3, which is opposite to the edge of the lid 20 with the seal 4, are popular.

As mentioned above, when the incising thread is tied around the central connecting part of the pack, there is no need to peel off one seal part to take out easily broken eggs such as chicken eggs, so there is no need to worry about accidentally breaking the eggs. Can be taken out easily.

Conventionally, the work of tying the incision threads around them was done manually, but since the incision threads had to be tied under tension, this work was not easy and inefficient, and supply and demand did not match the huge amount of consumption. The current situation is that we do not.

The present invention provides a method and apparatus for automatically and under tension surrounding and bundling the above-mentioned cutting system for cutting the lid of the pack to the central connecting part of the pack. The reason why the incision thread is tied under tension is that if it is in a relaxed state, there is a risk that the incision thread may get caught during handling at the store or during transportation.

The purpose of the present invention is to tie the incision threads in a state where the pack is deformed in a curved manner by utilizing the elasticity of the pack, and to effectively bind the incision threads by tensioning them when the pack is restored to its curved state. Furthermore, it is an object of the present invention to provide a tying device for incision threads that is suitable for highly efficiently enclosing incision threads with a tying effect that prevents mistakes in surrounding tying of incision threads. .

According to the characteristics of the present invention, the method of the present invention first curves the pack by bending both ends of the pack in the F direction with the central connecting portion moved parallel to the traveling direction in an upwardly opened state, and this deformation is maintained. On the other hand, as the pack was moved, an incision thread was passed from the bobbin winding through the upper center of the pack and connected to the knotter, and was wrapped around the central connecting part of the pack, and the middle of the incision thread was guided to the knotter to perform binding. Afterwards, it is bent to release the curved deformation and to be discharged from the binding position.

Furthermore, the present invention provides a device for effectively and highly efficiently performing the tying method, in which an incision thread guide member for guiding the incision thread let out from the bobbin to a knotter is supported so as to be rotatable in a reciprocating manner. A chain conveyor that supports the binding section and multiple pack holders at equal intervals and operates intermittently is installed.
The intermittent movement of the chain conveyor rotatably supports a stopper with which the advancing side of the pack comes into contact when the packs supplied and placed on the pack pedestal move to the bundling section. The present invention is characterized in that the midway of the incision thread, which is fed out and surrounded by the bobbin spool at the central connecting part of the pack, is guided to the knock by rotation of the incision thread guiding member.

- The method and device of the present invention described above utilizes the elasticity of the pack to curve and deform the pack downward when moving, when the incision thread for incising the lid is tied around the central connection part of the pack, and this deformation is performed. This is done while the pack is temporarily restrained, and the pack is restored by releasing the curved deformation.
The circumferentially tied incision thread is tied under tension.

Next, referring to the attached drawings Figures 4 to 7, pack 5 chicken eggs in two rows for a total of 10 eggs (see Figures 1 and 2).
An embodiment of a device for binding incision threads Y to egg packs P will be described.

Reference numeral 10 denotes a pair of chain conveyors (only one side is shown) that is stretched between four chain wheels 11 on each side, and the chain conveyors are driven by a known intermittent drive such as a clutch mechanism from an appropriate drive source (not shown). It is constructed so that it moves intermittently in the direction of the arrow via a device (not shown).

12 is a large number of pack holders supported at equal intervals on the e-chain conveyor. The pack pedestal moves and circulates in the order of the bag supply position 11, the cutting thread binding position (2), and the discharge position layer by the intermittent operation of the chain conveyor 10. The opposite bottom of the advancing side of one pack P supplied by the pack P (not shown) is placed thereon. The packs P supplied to the pack pedestal and removed from the pedestal are received by a plywood board (not shown) installed between the chain conveyors 10.

Reference numeral 13 denotes a cutting thread guiding member which is provided so as to be rotatable back and forth at the binding position INK, and is formed in a fan shape and rotates via a one-turn crack mechanism (7 not shown) from an appropriate drive source (not shown).
4 by a bell crank mechanism 15, and one rotation of the shaft 14 causes one reciprocation. Reference numeral 16 denotes a stopper, which is supported by a rotary solenoid 17 and rotates instantaneously when the core rotary solenoid is de-energized. It is provided at a position where the moving side edge of the pack P on the table comes into contact. 18 is a knotter provided at the lower binding position 11 of the chain conveyor 10. (As the knotter uses a known one, a description of its construction will be omitted.) At Y, the incision thread is wound and pulled out, passed through the tension run device 19, and passed through the guide 2o provided in the fan-shaped part of the incision thread guiding member 13. Thread knot part 18a of knock-18
It passes through the clip portion 18b and is held continuously. Next, the operation of binding the incision thread by the device having the above-mentioned nine configurations will be explained.

When the packs P, which have been fed to the pack holder 12 at the supply position I with the center connection part facing upward in the traveling direction, are held in a hanging state when the chain conveyor 10 moves intermittently to the bundling position ■? When the edge of the moving side of the pack P came into contact with the par 16, the edge of the moving side of the pack P bent downward and at the same time the edge of the opposite side was also formed at an acute angle, as shown in Figure 5. It curves downward along the pack holder 12, and is thus deformed into a curved state by its own elasticity. On the other hand, as the pack P moves, it is pulled out from the bobbin winding and the knotted part 18a of the knock-18 is pulled out from the bobbin winding.
The cutting thread Y held by the clip portion 18b is fed out from the state shown in FIG. 4 like a spool as shown in FIG. It becomes a form that reaches the knotter 18. In this state, axis 1
4 is driven one continuous rotation. First, by rotating the incision thread guiding member 13 counterclockwise by half a rotation of the shaft 14, the middle of the incision thread Y is bent in the pack P as shown in FIG.
is guided to the knob 18 along the bent edge 3 of the central connection part, and then the knock 18 is actuated to bind the incision thread Y. At the same time, the incision thread Y is pulled by half a rotation of the shaft 14 as shown in FIG. The guiding member 13 is returned to its original position in the clockwise direction, while the stopper 16 is turned counterclockwise instantaneously by energizing the dirotary solenoid 17 from the hanging state. As a result of this rotation, the pad P that had been deformed into a curved shape is released from its restrained state and returns to its original supplied state due to the recovery force due to its self-elasticity.

In this way, the incision thread Y tied around the connecting central bend line 3 of the pack P becomes in a taut state, and the pack P with the incision thread Y is intermittently placed on the chain conveyor 10 at the discharge position tllll in FIG. Move by train. Then, the stopper 16 is returned to the state shown in FIG. 5 again, and the above-described series of operations is repeated to bind the incision threads to the packs P that have been sequentially moved to the binding position.

When carrying out the above-mentioned device and tying the incision threads into the pack, there is a supply device that supplies the pack P onto the pedestal 12 at the supply position I, a discharge processing device for the pack that has tied the incision threads that have moved to the discharge position tlllK, etc. For compression, the following devices are used:
For example, the supply device stores a large number of packs stacked above the supply position, and suctions and blocks the air that acts on the suction member sequentially starting with the lowest pack, sucks the bottom of the packs with suction force, and sends each pack to a single pack. It is preferable to take out the pack onto a cradle, or to use a device in which a peeling member that engages and rotates on both ends of the pack in the longitudinal direction is installed so that one piece can be peeled off and taken out. It is also possible to install an elevating member at the bottom of the pack to push up and stack the bottoms of the packs one after another, or connect it to the discharge position and set up a belt conveyor to transport and collect the packs to the appropriate position. You can select it as appropriate.

By the above-described method and apparatus of the present invention, the incision thread for opening the lid of a pack made of hard PVC film, etc., which is popular for packaging eggs, food, fruits, etc., is tied around the central connecting part of the pack. When carrying out this process, the self-elasticity of the pack is used to maintain the curved deformation, and the center connecting part of the pack, which has recovered by releasing the restraint of the curved deformation, is tied around the center of the pack and tied with nine binding threads. are in a taut state9, and are not relaxed, so there is no chance of the incision thread being caught during handling, and by using the device of the present invention, it is possible to sequentially supply the incision thread with high efficiency compared to conventional artificial bundling. This has the effect that the incision thread can be wrapped around the packed pack.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the open state of the egg carton;
Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, Fig. 3 is an enlarged sectional view of an egg carton in which the incision threads of the lid are tied together, and Fig. 4 is a schematic side view showing an example of an apparatus for carrying out the method of the present invention. , FIG. 5, FIG. 6, and FIG. 7 are explanatory diagrams showing the binding effect of the incision thread.

Claims (1)

[Scope of Claims] ill The pack is bent downward by bending both ends of the pack whose central connecting portion is moved parallel to the direction of travel in the upwardly opened state, and this deformation is maintained; By moving, the incision thread passing through the upper central part of the pack and connected to the knotter is paid out from the bobbin winder, and it is surrounded by the central connection part of the pack, the middle of the incision thread is guided to the knotter, and after binding, the curved deformation is released. A method for tying lid cutting threads of packaging containers, characterized in that the threads are discharged from a tying position. (2) A chain conveyor that operates intermittently, supporting a binding part that rotatably supports an incision thread guiding member that guides the incision thread unwound from a bobbin spool to a knotter, and a plurality of pack holders at equal intervals. is provided, rotatably supports a stopper that the advancing side of the pack comes into contact with when the packs supplied and placed on the pack pedestal move to the bundling part during operation of the chain conveyor, and as the pack moves, Lid incision of a packaging container, characterized in that the incision thread drawn out from the bobbin and surrounded by the center connection part of the pack is configured to be guided to the knock by rotating the incision thread guiding member. Thread binding device.