JPH0640441A - Bag opening machine - Google Patents

Abstract

PURPOSE:To increase the speed of taking out of a content by a method wherein an air jetting port is provided on an insertion rod of which the leading end is inserted in a bag to hold the bag at that position, for an bag opening machine to cut open the bottom of a bag containing a powder or granular body and take out the content. CONSTITUTION:When a bag W in which a powder, etc., is encapsulated is mounted on a belt conveyor 10, and the conveyor 10 is driven, the bag W is dropped downward from the leading end of the conveyor 10 along a guide part 32. At this time, the bag W is received by a movable table 20 which is previously extended to the right side. At the same time, the bag W is put under a standing condition by erecting the arc-shaped bottom surface 32a and pressing the upper part of the bag W, by driving an air cylinder 34 of a bag standing means 30. Then, an insertion rod 40 is made to advance, and inserted in the upper part of the bag W, and the bag W is held. Under this condition, the content is discharged by cutting open the bottom part of the bag W by driving a cutter 50, and at the same time, air is jetted from an air jetting port at the leading end of the insertion rod 40 to prevent the inside of the bag W from becoming a low pressure condition, and thus the content is smoothly discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically cuts powder, granules, gelatinous substances, or the bottom of a bag encapsulating them to open powders, granules, gelatinous substances and the like enclosed inside. The present invention relates to a bag opening machine that can be taken out.

[0002]

2. Description of the Related Art Conventionally, there are some mechanical operations for taking out powdered gelatinous substances and the like enclosed in a bag, but the mainstream method is left to workers to manually perform. there were.

That is, an operator carries a bag in which powders, granules, gelatinous substances, etc. are enclosed to a hopper, and while supporting the bag with one hand, cuts the bottom of the bag with a cutter held in the other hand. The mainstream method was to take out the powder, granules, gelatinous substance, etc. inside while lifting and shaking the head of the bag with both hands.

[0004]

Among the above, in the bag opening operation by obtaining the bag, it is necessary to carry the bag to the hopper or to cut the bottom of the bag and lift the bag, which requires heavy labor. It was being done. Especially, the bag is heavy (20K
In some cases, the above problem was remarkable.

Further, the powder or the like in the bag may rise during the work, but some of the powder or the like are deleterious substances. At this time, the worker is taking measures such as wearing a dust mask to perform the work, but this is not a preferable working environment.

There is also a technique for opening the bag mechanically, but the conventionally known bag opening machine is a double- or triple-layer bag using various materials such as multi-layer bags (paper, plastic bags, clothes bags, etc.). ) Or to open bags of different sizes in succession. further,
There were also problems in terms of productivity and versatility.

[0007] Further, although there is a conventional bag opening machine that uses a suction cup to hold the bag, this method is difficult to apply to a bag whose surface is not flat.

The present invention has been made in view of the above circumstances, and even if it is a multi-layer bag or a bag whose surface is not flat,
An object of the present invention is to provide a bag opening machine capable of automatically opening powders, granules, gelatinous substances and the like inside by opening the bag.

[0009]

In order to achieve the above object, in the invention according to claim 1, an air injection port is provided in an insertion rod for holding the bag, the tip of which is inserted into the bag, at that position. It is characterized by

According to the second aspect of the present invention, an air injection port is provided in the insertion rod for inserting the tip into at least the upper portion of the bag to hold the bag at that position, and the air is held by the insertion rod. A cutting means such as a cutter for opening the bottom of the bag or a rotary blade is provided below the insertion rod.

Further, in the invention according to claim 3, a transfer means for transferring the powder, the granules, the gelatinous substance or the bag in which they are enclosed, and a horizontal direction below the transfer direction tip of the transfer means. A movable table that is provided so as to be movable back and forth in the forward direction and that receives the bag that is transferred from the transfer means when the bag is forwardly extended; a bag standing means that leans the bag received by the movable table to an upright state; An insertion rod having an air injection port which is provided in the vicinity of the front end in the transfer direction so as to be capable of advancing and retreating in the horizontal direction and has a front end inserted into at least the upper portion of the bag leaned by the bag raising means to hold the bag at that position. It comprises a cutting means, such as a cutter or a rotary blade, which is provided above the movable table so as to be movable in the horizontal direction and which cuts the bottom of the bag leaning on the movable table. It is characterized in.

[0012]

According to the invention described in claim 1 or 2, since the tip of the insertion rod is inserted into the upper part of the bag to hold the bag at that position, the bag has a multi-layer structure, hemp or the like. The bag can be held even if the surface is not flat as described above.

Further, since the structure is such that air can be jetted from the insertion rod, even if the powder, granules, gelatinous substances, etc. inside the bag fall due to its own weight, the inside of the bag will not become a negative pressure. It can be prevented, and the powder, granules, gelatinous substance, etc. can be taken out well.

According to the third aspect of the invention, when the bag in which the powder, granules, gelatinous substance, etc. are enclosed is carried to the base end side of the transfer means by an operator or the like, the bag is formed. It is automatically transferred to the tip by the transfer means and falls downward. At this time, the movable table is overhanging in advance and receives the falling bag.

The bag received by the movable table is erected by the bag raising means and the lower insertion rod for the purpose of holding the bag, and then the insertion rod is sent forward and inserted into the upper portion of the leaned bag. . This holds the bag in place.

Then, the cutting means is driven to cut open the lower part of the bag. This pulls the movable table backwards,
The powder, granules, gelatinous substance, etc. enclosed in the bag falls due to its own weight. At this time, the bag remains inserted and held in the insertion rod, and the powder, granules,
It does not fall with gelatinous substances.

When powder, granules, gelatinous substance, etc. are dropped by opening the bottom of the bag, air can be jetted from the jet port provided in the insertion rod, as described above. It is possible to prevent the upper part of the bag from being negatively pressurized and the removal condition of powder, granules, gelatinous substances, etc. from being deteriorated, and the upper part of the bag is pressurized by the flow of air.
The removal of granules, gelatinous substances, etc. is promoted, the discharge time of powders, etc. can be shortened, and the remaining of these powders, granules, gelatinous substances, etc. in the bag can be suppressed as much as possible.

Further, by adjusting the amount of air, the angle of the bag, the length of the cut end of the bag and the like, it is possible to discharge a fixed amount of powder, granules or gelatinous substance.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side view of essential parts of a bag opening machine according to the present invention, and FIG. 2 is an overall side view of the bag opening machine. In these drawings, reference numeral 10 is a belt conveyor for transferring a bag W in which powder or particles are enclosed, and the belt conveyor 10 is mounted on the upper floor 1 via legs 11.

A movable table 20 for receiving the bag W transferred from the transfer means is provided below the tip of the belt conveyor 10 in the transfer direction so as to be movable back and forth in the horizontal direction, and above the movable table 20 is a movable table. A bag upright means 30 for leaning the bag received by 20 in an upright state, and an insertion rod 40 for inserting the tip into the upper portion of the bag W leaned up by the bag uprighting means and holding the bag W at that position are provided. Has been. In addition, a bag W leaning on the movable table 20 is provided at a position facing the movable table 20.
A cutter 50 that cuts open the bottom of the is provided so as to be movable laterally (a direction orthogonal to the paper surface of FIGS. 1 and 2).

The movable table 20, bag raising means 30,
The insertion rod 40, the cutter 50, etc. are arranged on the mount 61,
In addition, the box 62 is arranged so as to be surrounded. An opening 61a is provided in the gantry 61, and the opening 61a
A hopper 63 extending downward is attached to a. In addition, the platform 61 has traveling wheels 65 and outriggers 66.
Are attached respectively.

Reference numeral 70 is a chute that extends obliquely downward from the side opening of the box 62, and 72 is a box for receiving an empty bag discharged through the chute 70.

The belt conveyor 10 is for transferring the bag W placed on the upper portion by the worker to the left in FIG. 2, and the height of the upper surface of the belt conveyor 10 is a height at which the worker can easily place the bag. The length of the leg 11 is determined so that A guide bar 12 is attached to the side of the belt conveyer 10 opposite to the side on which the worker stands, so that the bag W is prevented from falling.

The movable table 20 has casters 20a at the bottom.
The air bag 21 is attached to the tip of the air cylinder 21 so that the air cylinder 21 can be moved backward, and the bag W sent from the belt conveyor 10 can be received by the upper surface when the bag W is in a state of being projected forward. It is a thing.
An air nozzle 22 is attached to the side of the movable table 20 so as to face obliquely upward.

The bag raising means 30 is connected to an arcuate guide portion 32 provided at the tip of the transfer belt conveyor 10. For example, the arcuate bottom surface 32a of the guide portion 32 has a shaft 33. It is attached so as to be rotatable around the center of the arc-shaped bottom surface 32a, and this arcuate bottom surface 32a is rotated by the air cylinder 34.

The insertion rod 40 is composed of, for example, two rods provided at right and left at predetermined intervals and vertically provided in two stages (four in total), which are connected via a connecting member 41. It is attached to the piston rod of the air cylinder 42. The base end portion of the air cylinder 42 is the output shaft 4 of the motor 43.
3a, the insertion rod 40 is rotated horizontally with the air cylinder 42 by the rotation of the motor 43.

Further, as shown in FIG. 4, each of the insertion rods 40 has a sharp tip so that it can be easily inserted into the bag W. Further, the lower insertion rod 40 is hollow,
Air jets 40a directed upward and downward on the side
The air injection port 40a is connected to the air header 45, which is an air supply source, through the hollow portion 40b of the insertion rod 40. Then, by controlling the solenoid valve 46 for jet pulse provided in the air header 45, the air is jetted from the air jet port 40a several times within a predetermined time (for example, four times in about 6 seconds). It has become. The insertion rod 40 is also attached to the tip of the air cylinder 34.

The air header 45 is also connected to the air nozzle 22 attached to the movable table and vibrating the lower portion of the bag, and the solenoid valve 47 for jet pulse provided in the air header 45 is adjusted. Thus, air is jetted from the air nozzle 22.

The cutter 50 is attached to a moving plate 51 which moves in a direction orthogonal to the plane of the drawing in FIG. Is omitted).

At a position above the movable table 20 and facing the tip of the cutter 50, a pusher 53 for pressing the bag W being cut from the back side is provided with an air cylinder 54.
It is attached so that it can be moved back and forth by the cutter 50, and is designed so that the cutter 50 can surely cut the bottom of the bag.

In FIG. 2, reference numeral 74 is a control panel in which various electric parts are housed and switches such as a start button are provided. Further, in FIG. 3, reference numeral 76 is a fixing plate for separating the empty bag from the insertion rod 40.

Next, the operation of the bag opening machine having the above construction will be described.

To operate the bag opening machine, first, turn on the key switch and press the start button (both not shown).

Next, the bag W is placed on the belt conveyor 10 so that the longitudinal direction of the bag W coincides with the transfer direction of the belt conveyor 10. This bag W is a belt conveyor 10
Although the work to be placed on the belt conveyor 10 is usually performed manually, the present invention is not limited to this, and the belt conveyor 10 can be properly held properly by the attitude control means from another transfer belt conveyor.
You can put it on top.

After confirming that the ready lamp is turned on, the start button of the belt conveyor 10 is pushed. The ready lamp is in a state in which the movable table 20 is moved forward, and the arc-shaped bottom surface 32a of the bag raising means 30.
Is lit up along the guide portion 32, and the insertion rod 40 and the pusher 53 are respectively retracted.

As the belt conveyor 10 is driven,
The bag W placed on the upper portion is transferred to the front and drops downward along the guide portion 32 from the tip of the belt conveyor 10.
Then, it is received by the movable table 20 which is projected forward in advance.

Next, the air cylinder 34 of the bag raising means 30 is driven, and the arcuate bottom surface rotates counterclockwise in FIG. 1 about the shaft 33 to press the upper portion of the bag W and to hold the bag W. The lower insertion rod 40 is inserted to bring the bag W into an upright state.

At this time, the upper insertion rod 40 moves forward and is inserted into the upper portion of the bag W in the upright state. This holds the bag W in that position. With the insertion rod 40 and the air cylinder 34, it is possible to easily hold a bag having at least two layers, a paper and a synthetic resin such as polyethylene, clothes such as a floor, and a multiple bag made of other materials.

Next, the cutter 50 is moved by a driving means (air) (not shown) to cut open the bottom of the bag W.
At this time, by driving the air cylinder 54,
The pusher 53 is advanced in advance to prevent the bag W from escaping rearward when the cutter 50 cuts it.

At this time, the bag W is still inserted and held in the insertion rod 40, and does not drop together with powder, granules, gelatinous substances and the like. Furthermore, since the cutting is performed by a cutter (one blade), there is an advantage that chips are less likely to be generated as compared with the case where a rotary blade is used.

Next, the air cylinders 21 and 54 are driven to move the movable table 20 and pusher 53 backward. As a result, the powder, granules, gelatinous substance, etc. inside the bag W are taken out from the cut-out opening at the bottom and guided into the hopper 63 by its own weight.

When the powdery gelatinous substance or the like inside the bag W is taken out from the cut-out opening at the bottom, the solenoid valves 46 and 47 are operated to operate the air injection port 40a at the tip of the insertion rod 40 and the movable table. Air is ejected from air nozzles 22 arranged near the bag 20 for vibrating the bag, and the air hits the open portions of the top and bottom of the bag W. As a result, the jetted air flow prevents the depressurized state of the upper part of the bag that occurs when discharging the powdery gelatinous substance and the like, and accelerates the discharge of the powdery gelatinous substance. It is possible to shorten the length and prevent powder, granules, gelatinous substances, etc. from remaining in the bag.

When the powder, granules, gelatinous substance, etc. have been taken out, the cylinder 34 is driven and the lower insertion rod retracts and is removed from the bag. Then, the 40 motor 43 is driven and the empty space is driven. The bag is inserted into the insertion rod 40 and is held by the air cylinder 42 while rotating about 180 degrees counterclockwise in FIG. 3 to reach a position above the upper opening of the chute 70.

Then, the cylinder 42 is driven and the insertion rod 40 is retracted. At this time, the empty bag comes into contact with the fixing plates 76 above and below the insertion rod 40 and is restricted from retracting integrally with the insertion rod 40, and eventually the insertion rod is removed from the bag W,
The bag W falls by its own weight and is collected in the box 72 via the chute 70.

The above is one cycle of the bag opening operation. If necessary, the above-mentioned steps 1 to 4 are repeated and the bag opening operation is continuously performed.

In the apparatus having the above-mentioned structure, since air is used as the driving means and no other driving means such as a motor is used, there is no danger of dust explosion. Also, the box 62
By maintaining a negative pressure inside with the dust collector provided in the guide and the pipe 73 connected to the dust, dust and the like can be sucked from the inlet 73a and the dust and the like can be prevented from scattering to the outside. Can be provided.

It should be noted that the shapes, dimensions, etc. of the respective constituent members shown in the above embodiment are merely examples, and can be variously changed as necessary.

For example, in the above embodiment, the belt conveyor 10 is used as the transfer means for transferring the bag W containing the contents to a predetermined location, but the present invention is not limited to this, and a conveyor using air may be used. Good.

The design of the shape of the insertion rod 40, the position and number of the ejection ports, and the like can be variously changed, and the cutter 50 can also be changed. For example, if chips and the like are not a problem, a rotary blade or the like can be used. It is possible to use cutting means,
The structure may be such that it moves from both the left and right sides and sandwiches the bottom of the bag to cut it.

The insertion rod is used as the output shaft 43a of the motor 43.
If a plurality of (for example, four at 90 ° intervals) are installed at equal intervals in the circumferential direction around, the steps at the time of the above steps can be started in parallel, and so-called rotary operation can be performed. It is possible to let them do it.

[0051]

As described above, according to the present invention, it is possible to automatically open the bag and take out the powder, granules, gelatinous substance and the like from inside the bag. Freed from the hard work below.

Further, since the air is jetted from the insertion rod, it is possible to prevent the misalignment and deflection between the layers even with a multi-layered bag by the insertion rod, as in the case of one bag.
While keeping the inside of the bag at a positive pressure, the flow of air can facilitate the extraction of powder, granules, gelatinous substances, etc.
It is possible to shorten the discharge time of the powders, granules, gelatinous substances and the like, and further, it is possible to obtain an excellent effect that the powders and the like can be remarkably reduced in the bag.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a bag opening machine according to the present invention.

FIG. 2 is an overall side view of the bag opening machine.

FIG. 3 is an overall plan view of the bag opening machine.

FIG. 4 is a sectional view of an insertion rod.

[Explanation of symbols]

 10 Belt Compare (Transfer Means) 20 Movable Table 22 Air Nozzle 30 Bag Standing Means 32 Bottom 40 Insert Rod 50 Cutter 70 Chute 72 Box 73 Dust Collector Connection Piping

Claims (3)

[Claims] 1. A bag opening machine, characterized in that an air injection port is provided in an insertion rod for inserting the tip of the bag and holding the bag at that position. 2. A cutter for inserting an end into at least an upper portion of the bag and holding an air jet port in the position for holding the bag at that position, and a cutter for cutting open a bottom portion of the bag held by the rod. A bag opening machine, characterized in that cutting means such as a rotary blade is provided below the insertion rod. 3. A transfer means for transferring a powder, granules, gelatinous substance or a bag in which they are enclosed, and a forward and backward movable portion provided horizontally below the forward end of the transfer means in the transfer direction. A movable table for receiving the bag transferred from the transfer means in the bulged state, a bag erection means for standing the bag received by the movable table in an upright state, and a horizontal direction near the tip of the transfer means in the transfer direction. An insertion rod having an air injection port for holding the bag at that position by inserting a tip into at least an upper part of the bag which is provided so as to be able to move forward and backward, and is horizontally supported above the movable table. A bag opening machine provided with a cutting means such as a cutter or a rotary blade which is movably provided and leans against the movable table to open the bottom of the bag.