JPH0630645Y2 - Bagging device with bag opening device - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention (Industrial field of application) The present invention relates to a bag packing device, and in particular, a binaural holding device for gripping both ears of the bag and a bag holding device at a position below the bagging material loading hopper. The present invention relates to a bag filling device provided with an opening device provided with a vacuum suction cup that vacuum-absorbs the center of the opening toward both outer surfaces and separates them.

(Prior Art) As an apparatus of this kind, there is Japanese Patent Application No. 59-192290 (Japanese Utility Model Laid-Open No. 61-107704) previously developed by the present applicant.

(Problems to be solved by the invention) Even in the above-mentioned prior art, although the result is tentatively obtained, when the opening device is only the vacuum suction cup, the opening of the bag is rarely insufficient and the bag is thrown in from the hopper. This may cause the bag-filled material to be caught or may spill outside, making it impossible to seal the opening of the bag later.

Therefore, the present invention is to ensure that the opening of the bag is opened to the desired shape to ensure the loading and sealing of the bagged material, and it is an object to provide such a device to the market.

Another object is to provide a bag opening auxiliary device with an opening confirmation sensor, and to simplify the device.

B. Configuration of the Invention (Means for Solving the Problems) In order to achieve the above-mentioned object, a binaural holding device for holding both ears of the bag and a center of an opening edge of the bag are provided at a lower position of the bagging material filling hopper. In a bag filling device equipped with an opening device provided with vacuum suction cups that adsorb under reduced pressure from both outer surfaces and separate from each other, a pair of insertion rods protruding vertically downward are provided at positions that can be inserted into the openings of the bags. There are two sets, each set of suction cups, and each set has one equal-sized arm rod for one insertion rod on the first axis of the axis parallel to the opening edge of the bag with respect to the machine frame. An insertion rod supporting portion that vertically supports the insertion rod is pivotally attached to the tip of each arm rod by a second pivot that is parallel to the first pivot,
The machine frame and each of the insertion rod supporting portions are connected by a parallel movement mechanism made of one of an endless belt type and a gear type. Between the decompression suction cups, one was arranged on each side of these decompression suction cups, and the state where the insertion rods were close to each other was set as a standby position, and the pair of arm rods were opposed to each other. After the vacuum suction cups are separated from each other from the horizontal position, the insertion rods are rotated downward to a position where they are engaged with the opening edge of the bag, and the bagged material is put back into the bag and then returned to the original position. A bag filling device having a bag opening device, characterized in that a motion driving source is connected to each of the arm rods.

In order to achieve the above object, in the bag filling device provided with the bag opening device, the insertion rods also serve as electrical contacts, and the end stoppers of these insertion rod descending strokes are electrically contactable with the insertion rods. In some cases, the OR output signal of each insertion rod due to the contact of these two contacts is used as an input signal for stopping the operation of the bag packing device.

(Operation) In the device of the present invention configured as described above, at the lower position of the bagging material loading hopper, both ears at the opening edge of the supplied bag are held by the both-ear holding device. ,
Next, the vacuum suction cup holds the opening edge of the bag from both sides of the bag, adsorbs the film in this portion and separates them, and separates the center of the opening of the bag into left and right.

Following this, the pair of insertion rods come close to each other,
From the position just above the opening edge of the bag, as each arm rod rotates,
The parallel movement mechanism descends while maintaining the vertical posture, and the tips of the insertion rods are respectively inserted inside the opening edges of the bag opened by the decompression suction cups, and gradually inserted deeply into each arm. With the rotation of the rod, they are separated from each other in the horizontal direction, and the opening of the bag is lightly pulled in the direction parallel to both side surfaces to make a tension state.

At this time, the opening portion of the bag is expanded into a hexagonal plane shape by the holding portions of both ears and a pair of insertion rods (see FIG. 2).

In this state, the bagged material is loaded, and after insertion, each of the insertion rods returns to its original position and is completely removed from the bag.
The opening of the bag is sealed with a pair of opening heat sealers.

In the device according to claim 2), when any one of the insertion rods cannot be inserted into the opening of the bag when the insertion rod descends, the insertion rod directly contacts the stopper and outputs an output signal. The bagging device is stopped by using this signal as an input signal.

(Embodiment) The present invention will now be described based on a representative embodiment shown in the drawings.

Referring to FIG. 5, first, a general bagging device equipped with the device of the present invention will be described. This apparatus comprises a bag-making apparatus section A, a bag-filling apparatus section B, and a bag-making apparatus section A, which are provided in parallel in one machine frame 10 and are heat-rolled as shown in FIG. A wrapping material band F made of a flat tube made of a plastic synthetic resin is hooked on a raw fabric support device 11, and the wrapping material band F continuous from this is held by a pair of holding type intermittent transfer rollers 12 and intermittently conveyed at a constant size. Then, at each stop, on the downstream side of the intermittent transfer roller 12, the upper both ears of the sagging packaging material strip F having a length of one bag is held by a pair of holding devices 13, and the holding device is immediately moved to the holding position. The lower side,
It is welded in the transverse direction by the bottom heat sealer 14, and the immediate downstream side of the bottom welded portion 15 formed in the packaging material band F is cut in the transverse direction by the cutter 16 to form an independent bag B ₀ , which is still held by the holding device. , The bag B ₀ is conveyed in the direction of the opening edge 17 and is positioned directly below the material loading hopper 20 of the bag packing device section B. This input hopper 20
An opening device 22 provided with a decompression suction plate 21 that opens and closes the opening edge 17 of the bag B ₀ that has been further conveyed is provided directly below.

An opening heat sealer 23 is provided immediately below the decompression suction cup 21 along the opening edge 17, and is an impulse type heat sealer in this embodiment, which is an opening / closing jaw member common to the decompression suction cup 21. Is supported by.

In addition to such a device, in the device of the present invention, in the bag conveying direction, in the vertical direction at the positions before and after the vacuum suction cup 21 that can be inserted into the openings 18 inside the opening edge 17 of the bag B ₀ respectively. Insert rod 24 that protrudes downwards
Are provided one by one in pairs, and each decompression suction cup 21 side is set as a set, and each set has an equal size with respect to the machine frame 10 by the first pivot 25 having an axis parallel to the opening edge 17 of the bag B _0. Of the arm rods 26, the insertion rod support portion 29 for vertically supporting the insertion rod 24 is pivoted at the tip of each arm rod 26 by a second pivot shaft 27 parallel to the first pivot shaft 25. The machine frame 10 and the insertion rod support portions 29 are connected by an endless belt type or gear type parallel movement mechanism 30.

Further, the pair of two arm rods 26 face each other, and from the position where these insertion rods 24 come close to each other, after the decompression suction cups 21 are separated from each other, the insertion rods 24 are downwardly opened at the opening portion of the bag B ₀ . 1
It is connected to a reciprocating motion drive source 31 which is rotated to a position where it is engaged with the bag 8 and returns to the original position after the bagged material is put into the bag B ₀ .

As an example of the connection between each arm rod 26 and the reciprocating motion drive source 31 described above, each arm rod 26 and the first pivot shaft 25 are fixed, and the first pivot shaft 2
It is most preferable to connect 5 to a reciprocating motion driving source (rotary type air reciprocating driving source) 31 for reciprocating rotation, but the middle of the arm rod 26 or the second pivot 27 is used as a reciprocating motion driving source such as an air cylinder. Even if they are connected, they are the same as this invention.

As the parallel motion mechanism 30, the first pulley 32 having the first pivot shaft 24 and the second pivot shaft 26 as axes and having the same diameter is used.
And a second pulley 33 are provided, the first pulley 32 is fixed to the machine frame 10, and the second pulley 33 is fixed to the insertion rod support portion 29.
A common endless belt 34 is engaged with the pulley.

The diameter of the second pulley 33 described above is preferably the same as or slightly larger than the diameter of the first pulley 32.

In the embodiment, the endless belt 34 is a timing belt.

Instead of the belt type as the parallel movement mechanism 30, the first pulley 32 and the second pulley 33 are replaced by a gear 32.
The present invention is also the same even if the gears 34a and 33a are used instead of the endless belt 34 and the gear 34a that meshes with these two gears 32a and 33a interferes with the arm rod 26 (see FIG. 2). In this case, the gear 32 on the fixed side of the machine frame 10
The diameter of a is smaller than that of the other gear 33a, that is, the number of teeth is smaller.

In the standby position of the arm rods 26 facing each other as described above, the second pivot shaft 27 is slightly higher than the first pivot shaft 25, and the arm rods 26 face upward by about 10 ° from the horizontal line ( (See Figure 1, left half).

As the reciprocating motion driving source 31, a pneumatic cylinder or a solenoid is used.

Further, the insertion rod 24 also serves as an electrical contact, and the end stopper of the insertion rod descending stroke is an electrical contact capable of contacting the insertion rod 24, and the OR output of each insertion rod 24 by the contact of these two contacts. In some cases, the signal may be an input signal for deactivating the bag filling device.

The above-mentioned stopper may be provided directly on the machine frame 10, or may be the opening heat sealer 23 or its supporting member, and the invention is the same. In the example of FIG. 1, the opening heat sealer 23 also serves as a stopper and an electrical contact.

(Operation of Embodiment) The bag B ₀ is manufactured in the bag making apparatus section A and is conveyed to the bag packing apparatus section B while being held by the both-ear holding apparatus 13. At this position, the pair of decompression suction cups 21 first approach each other. Then, the opening edge 17 of the bag B ₀ is held. At this time, in this embodiment, the opening heat sealer 23 also moves, but at this time, the opening heat sealer 23 is not heated.

Next, they are separated from each other, and the opening edge 17 has a vacuum suction cup 21.
And the center of the width of the bag is opened to the left and right (see the chain double-dashed line in FIG. 3). In cooperation with this operation, the binaural holding devices 13 are arranged so as to be slightly closer to the center side of the bag.

Next, when each arm rod 26 is gradually lowered from its standby position by the reciprocating drive source 31, each of the insertion rods 24 is vertically connected because the parallel movement mechanism 30 connects the machine frame 10 and the insertion rod support portion 29. While maintaining the state, or while the tip of each insertion rod opens slightly outward from the root, the insertion rod 24 descends along the arc trace illustrated in the right half of FIG. Inserted into the openings 18 of the bag B ₀ opened by
In the initial stage, a vertical motion with many vertical components is performed, and as it is inserted deeper and lower than the decompression suction cup 21, it becomes a horizontal motion with many horizontal components, and the opening 18 is expanded. It stops when it is tensioned (see Fig. 4).

Next, the shooter at the discharge port of the bagged material loading hopper 20 is inserted into the opening 18 of the bag B ₀ , then the bagged material is loaded, and then the shooter returns upward and the insertion rod 24 Also returns to their original positions.

Next, the pair of gripping devices 13 holds the opening edge 17 while
The openings 17 are separated from each other and the opening edges 17 are tensioned straight, and the pair of opening heat sealers 23 are electrically heated to approach each other to weld the openings 18 of the bag B ₀ along the opening edges 17. At the time of this welding, a discontinuous cut may be punched immediately below the opening heat sealer.

When inserting the above-mentioned insertion rod 24, when the bag B ₀ is not sufficiently opened and at least one of the insertion rods 24 cannot be inserted into the inner opening 18 of the opening edge 17 of the bag B ₀ , one of them is opened. The insertion rod 24, which is not engaged with the edge 17, directly contacts the opening heat sealer 23, the electrical contacts are closed, and an output signal is generated, which causes the entire bagging apparatus to stop.

C. Effect of the Invention In the present invention configured and acting as described above, since the arm rods are horizontal in the upper position of each of the insertion rods, the operation of the insertion rod is made at the initial stage of the insertion operation. Has a large vertical component, that is, it descends almost vertically. Therefore, even if the opening space of the bag by the opening device of the vacuum suction cup is narrow, the bag is securely and deeply inserted, and the horizontal phase separation component gradually increases. This has the effect of expanding the opening of the bag without fail.

In addition, since the parallel motion mechanism is an endless belt type or gear type, unlike the link mechanism type, it does not have many pivot parts, the structure is simple, the reciprocating rotation angle can be 90 ° or more, the operation is quiet and light. is there.

Since the apparatus according to claim 2) is constructed and operates as described above, if even one of the insertion rods cannot be inserted into the opening of the bag, the sensor is immediately activated. Outputs an output signal and stops the bagging machine,
When the opening portion of the bag is not sufficiently opened with the pair of insertion rods, the bag-filled material is not charged, and there is no possibility that these will be scattered outside the bag.

Moreover, since the insertion rod and the sensor are also used as the same member,
The structure is also simple.

(Effects unique to the embodiment) In this embodiment, the same effects as those described in the above claims 1) and 2) are obtained, and when the parallel motion mechanism 30 is an endless belt type as described above, There is almost no phase shift during operation, and even if the range of reciprocating rotary movement of each arm rod 26 is about 100 ° or more, it can move smoothly without any barring, and during that time, since the endless belt is a timing belt, The respective insertion rods 24 are maintained in a substantially vertical state without any risk of phase shift during operation.

When the parallel movement mechanism 30 is a gear type, there is no slip other than the rattling of the gears of the gears 32a, 33a and 34a, and the effect of the parallel movement mechanism is accurate.

In addition, the pulley 32 or the gear 32a fixed to the machine frame 10 side that constitutes this parallel movement mechanism is the insertion rod support portion 2.
In the case where the diameter is slightly smaller than that of the pulley 33 or the gear 33a fixed to 9, the insertion rods 24 are spread deeper to the left and right than the root of the insertion rod 24 as they are deeply inserted into the bag B ₀ . The opening 18 of the bag B ₀ has the insertion rod 24.
Does not slip off.

Furthermore, since the insertion rod 24 and the opening heat sealer 23 are electrical contacts capable of contacting each other and are a kind of sensor for confirming the opening of the opening edge 17, it is not necessary to separately provide a sensor, and the device is not necessary. Is simplified.

Other, the width of the bag B _0, or hopper 20 under reduced pressure to suit the cross-sectional shape of the lower end of the chute sucker 21 left and right pair of spacing opening device base 3 of the insert rod 24 to be inserted into the bag B ₀
5 is moved and fixed to the machine casing 10 and used.

[Brief description of drawings]

1 is a side view of a main part of the present invention, FIG. 2 is a side view of another embodiment of a parallel movement mechanism, and FIG. 3 is an opening part. FIG. 4 is a plan view of an expanded state, FIG. 4 is a schematic perspective view of the state in which the opening edge and the opening are expanded, and FIG. 5 is a schematic perspective view of the prior art. Main symbols 10 ... Machine frame, 12 ... Intermittent transfer roller 13 ... Both-ear holding device, 14 ... Bottom heat sealer 20 ... Input hopper, 21 ... Decompression suction cup 23 ... Opening heat sealer 24 ... Insert rod, 30 ... Parallel movement mechanism

Claims (2)

[Scope of utility model registration request] 1. A binocular holding device for holding both ears of the bag and a decompression suction cup for decompressing and adsorbing the center of the opening edge of the bag from both outer surfaces are provided at the lower position of the bagging material loading hopper. In a bag filling device provided with a certain opening device, a pair of vertical insertion rods projecting downward are provided at positions where they can be inserted into the opening portions of the bags, and each suction cup is used as a set. Each of the insertion rods is equipped with one arm rod of equal size by the first pivot axis parallel to the opening edge of the bag with respect to the machine frame. An insertion rod support portion that vertically supports the insertion rod is pivotally attached by a second pivot axis parallel to one pivot axis, and the machine frame and each insertion rod support portion are of an endless belt type or a gear type. They are connected by a parallel movement mechanism consisting of one of these, and the insertion of these one-to-two pairs The position of the rod is between the pair of vacuum suction cups when viewed in a plane, and one rod is provided on each side of these vacuum suction cups, and the state where the insertion rods are close to each other as a standby position is From the horizontal position where the pair of arms and rods face each other, after the decompression suction cups are separated from each other, the insertion rods are rotated downward to a position where they engage with the opening edge of the bag, and the bag-filled material is packed in the bag. A bag filling device provided with a bag opening device, wherein a reciprocating motion drive source for returning to the original position after being thrown in is connected to each of the arm rods. 2. The insertion rod also serves as an electrical contact, and the end stoppers of these insertion rod descending strokes serve as electrical contacts capable of contacting the insertion rod. A bag packing device provided with a bag opening device according to claim 1 of the utility model registration, wherein an OR output signal is used as an input signal for stopping the operation of the bag packing device.