JPH02219728A - Apparatus for opening bag - Google Patents

Abstract

PURPOSE:To suppress paper dust and fluff as much as possible by a method wherein a lower face side of a containing bag is linearly opened with a cutter knife proceeded while contents are dropped with the bag compressed from both ends in a slacked state according to drop of the contents due to gravity. CONSTITUTION:A containing bag A is projected and secured at a closed belt part mouth at both ends by claw members 33 of an endless rotating left clamp chain 16 and an endless rotating right clamp chain 17, while it is pressed at the center from both sides by a left pressing guide member 12, a right pressing guide member 13, a left clamp chain guide member 14 and a right clamp guide member 15 to be narrow to be slacked downward. When the containing bag A proceeds from an inlet side (m) to an outlet side (n), a cutter knife 11 proceeds toward an opposite direction, a widthwise center part on the lower face of the containing bag A which is in a slacked shape is out open linearly in order. Occurrence of dust and fluff is suppressed as much as possible so that there is little dust and fluff mixed into the taken out contents, thereby being efficient in quality control.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a package opening device that accommodates and seals contents.

(Prior art) As a means of opening a package made of kraft paper or a laminate of kraft paper and polypropylene flat yarn fabric, which contains and seals synthetic resin pellets, flour, cement, etc., both ends of the package are fixed. Then, the upper part of the center part is cut with a square upper blade, the mounting plate is rotated downward, the lower blade is used to divide the mounting into two parts, and the contents are poured out from the split opening of the half-mounted part that has become two parts. After that, the mounting plate is rotated upward to make it horizontal and the empty bag is discharged. A means for dropping the powder, a means for cutting the front end face of the mount with a cutter, then cutting both end faces with a left cutter, and a means for dropping the powder into the hopper after cutting it by 3 degrees, a mount advanced on the guide path. The lower side of the bag is passed over a cutting mechanism consisting of a left-handed rotating cutter and a right-handed rotating cutter to form two openings on the lower side, and the means for dropping the contents from these openings is to press the package onto the fixed cutter. The empty bag is removed after making an X-shaped incision on the bottom side and letting the contents fall, and a low-speed rotary blade cuts both side edges of the package placed on the conveyor to remove the contents, and then removes the empty bag. There is a means for discharging the empty bag by pinching its tip with a chain for carrying out the empty bag.

In this way, mechanical bag opening means can be summarized as follows:
Cutting with upper and lower blades, ■ Cutting with plate-shaped fixed blade, ■
Conventionally, a cutting method using a circular rotating blade has been used.

In addition to such mechanical means, there is a method of manually opening the bag using a cutter knife or scissors.

Opening the bag by such conventional mechanical means produces waste paper, paper fuzz (including laminated plastic materials),
) occurred, and when the contents were taken out, these paper wastes and paper fuzz mixed in with the contents, which was extremely inconvenient.

Therefore, there has been a need for a means to minimize the amount of paper waste and paper fuzz mixed into the extracted contents.

(Problems to be Solved by the Invention) In the conventional technology, paper scraps, paper fluff, etc. are mixed into the contents taken out after opening the packaging bag, which poses a problem in that quality control of the contents is hindered.

(Means for Solving the Problems) The present invention provides a means for minimizing the mixing of paper scraps, dirt, etc. into the contents taken out when the package is torn open, thereby preventing any hindrance to quality control. A cutting iR ellipse is provided in which a cutter knife is attached to an endless rotary chain extending in the length direction along the width direction center line, and the cutting iR ellipse is arranged on the left and right of this cutting am, and A right presser guide member and a right presser guide member that are symmetrically arranged with a width on the carry-in side and a narrow width on the carry-out side with respect to the center line and extend in the length direction, and each of these right presser guide members and right presser guide member. The left clamp chain guide member and the right clamp chain guide member are arranged directly below, and the upper running part runs along the left clamp chain guide member and the right clamp guide member, respectively, and can freely protrude into the closing band parts at both ends of the mounting. This tearing device is characterized in that it is provided with a presser guide mechanism consisting of an endless rotating left clamp chain and an endless rotating right clamp chain each having a large number of claw members arranged in the length direction.

(Function) When the endless rotating left clamp chain and the endless rotating cloth clamp chain press the closed band at both ends of the mounting and move slightly forward, the cutter knife attached to the endless rotating chain of the cutting mechanism moves in the direction of movement of the mounting. Proceed in the opposite direction and cut the bottom side of the mounting in the length direction along the width direction center line, and the right presser guide member and the right presser guide member make the loading side wide and the unloading side narrow, and the mounting is completed. The bag sag as it is pressed down from both ends, and the incision gradually expands as the contents fall, allowing the contents to fall out of the bag and be removed from the bag.

(Example) Embodiments of the device of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the bag opening device 1 has a machine stand 2.
The upper frame portion 2a is provided with a cutting machine 13, a presser guide mechanism 4, and a hopper portion 5.

The cutting mechanism 3 is attached to a driving chain wheel 8 and a driven chain wheel 9 that rotate via an electric motor 1116 and a transmission mechanism 7, and extends in the length direction along the width direction center line 6, and extends in the direction of arrow (a). A cutter knife 11 is attached to an endless rotary chain 10 that rotates, and this cutter knife 11 has a diagonal blade portion 11a formed in the direction of arrow (a).

The presser guide mechanism 4 includes a right presser guide member 12, a right presser guide member 13, a left clamp chain guide member 14, a right clamp chain guide member 15, an endlessly rotating left clamp chain 16, and an endlessly rotating cloth clamp chain 17. .

The right presser guide member 12 and the right presser guide member 13 are disposed on the left and right sides of the cutting mechanism 3, and relative to the widthwise south center line 6, the carry-in (!!I(m) is wide and the carry-out 1ull (n> is width It has a narrow and symmetrical arrangement and extends in the length direction, with both ends being upwardly curved ends 12a, 12b, 13a, 1
This is 3b.

The left clamp chain guide member 14 and the right clamp chain guide member 15 are arranged directly below the left presser guide member 12 and right presser guide member 13, respectively, and have downwardly curved ends 14a and 14b at both ends.

15a and 15b, and a predetermined vertical interval (s) is maintained between the upwardly curved end 12a and the downwardly curved end 14.
a forms an entry end (u), and the upwardly curved end 12b and the downwardly curved end 14b form an exit end (v).

The endless rotating left clamp chain 16 and the endless rotating base clamp chain 17 are driven synchronously via an electric fi 18, a universal joint 19, and a shaft coupling 20, with a driving chain wheel 21,
The upper running portion 16a is hung on the driven chain wheel 22, respectively.
, 17a are formed to run along the left clamp chain guide member 14 and the right clamp chain guide member 15, respectively, and between the vertical distance (s) between the left presser foot guide member 12 and the right presser foot guide member 13, Further, as shown in FIGS. 3 and 4, these endless rotating left clamp chain 16 and endless rotating base clamp chain 17 each have upward claw members 23, 23, . A large number of ・ are arranged, and these claw members 23.23 are mounted (a)
It can be inserted freely into the closed band parts (b) and (b) at both ends of the.

The hopper part 5 has a drumstick shape when viewed from above, and the front part in the length direction is connected to the carrying-in OI! Export the rear part to l(m) 1! I
(n), has tapered side walls 5a5a with a wide front part and a narrow rear part, and has a bottom part 5b lower than the upper frame part 2a.

In this case, one of the upper frame portions 2a is a fixed frame and the other is a movable adjustable frame.

Furthermore, the unloading rfR(n) is provided with an empty bag removing mechanism 24, and this empty bag removing machine l! 24 is an empty bag removing curved member 25 attached to the upper frame part 2a, and claw members 23 and 23 are attached to both ends thereof.
is formed so that the middle part of the empty bag (C) into which it is inserted rides up and both ends are pulled out from the claw member 23.23,
The empty bag receiver is designed to fall onto the member 26.

Further, a sensor 27 for detecting the advancing position of the mounting (A) is provided on the upper frame portion 2a so as to issue a rotation signal of the endless rotation chain 10 at a predetermined time when the cutter knife 11 is attached. The cutter knife 11 is placed on standby in advance and is configured to run when it is mounted (a) or sent.

In the figure, 28 is a conveyor for transporting the mounting, 29 is an adjustment ellipse for adjusting and moving one adjustment frame of the upper frame portion 2a,
30 is an interlocking mechanism, and 31 is an adjustment handle.

Since the present invention is configured as described above, the mounts (
In a), the closing band parts (b) and (b) at both ends are thrust and pressed by the claw members 23, 23, etc. of the endless rotating left clamp chain 16, the endless rotating table clamp chain 17, and the left presser guide member 12, right presser guide member 13, left clamp chain guide member 14. The right crank guide member 15 presses the center from both f@ sides so that the width becomes narrow and sag downward, and when the forward end of the mounting (a) comes to the sensor 27 position, the endless rotating chain of R oval 3 is cut. 10 rotates and the cutter knife 11 advances in the direction of arrow (a), so that the center line in the width direction of the lower surface of mounting (a) that goes in the direction of arrow (a) is successively incised, and the actual product @ (a) moves forward. As the incision is made from the end to the rear end, the mounting (a) is gradually shortened in the width direction and becomes sagging, allowing the contents to fall smoothly into the hopper part 5.

Next, when reaching the unloading end (n), there is a mounting (
Since the middle part of a) rides on the empty bag removing member 25 and pulls out the closure band part (0) from the claw members 23, 23...
The empty bags (c) and all the bags fall into the member 26 one after another (see FIGS. 5(a), (b), and (c)).

In this case, the mounting (a) is from the loading side (m) to the loading side (n).
The cutter knife 11 advances in the direction of the arrow (a), and the center portion of the lower surface of the mounting (a) which has become sagging is successively cut in a straight line, thereby generating paper waste and paper fuzz. is suppressed as much as possible, and paper waste in the removed contents is suppressed as much as possible.
There is almost no paper fuzz mixed in, and the present invention is a very effective means for quality control.

The present invention is effective when used to open three-layer bags made of kraft paper, bags with synthetic resin film laminated on the inner surface of kraft paper, flat yarn knitted bags, etc., and is useful for refilling the contents and changing the capacity. It is also suitable for opening bags at the time of opening.

(Effects of the Invention) The present invention advances the cutter knife at a predetermined time in the opposite direction to the progress of the packaging while the packaging is progressing, cuts the bottom side of the packaging in a straight line, and removes the packaging from both ends as the contents fall due to gravity. Since the contents are dropped while being shortened and sagging while being pressed, the generation of paper waste and paper fuzz can be suppressed as much as possible, which is very effective in terms of quality control of the taken out contents.

[Brief explanation of the drawing]

Figure 1 is a side view of the device of the present invention, Figure 2 is a plan view of the same, Figure 3 is an enlarged detailed view of the main parts of the endless rotating left clamp chain and the endless rotating table clamp chain, and Figure 4 is the same. FIG. 5 is a detailed view showing the related structure of the left presser guide member, the right presser guide member, the endless rotating left clamp chain, and the endless rotating table clamp chain, and FIG. 5 is an explanatory diagram of the tearing process. DESCRIPTION OF SYMBOLS 1... Bag opening device, 3... Cutting mechanism, 4... Presser guide mechanism, 6... Width direction center line, 10... Endless rotating chain, 11... Cutter knife, 12... ...Left presser guide member, 13...Right presser guide member, 14...Left clamp chain guide member, 15...Right clamp chain guide member, 16...Endless rotating left clamp chain, 17...
・Endless right-turning clamp chain, 23...claw member, (a)...mounting, (b)...closing band part, (m)...carrying-in side, (n)...carrying-out side. Figure 3 Patent applicant Misuzu MEC Co., Ltd.] $4 Figure

Claims (1)

[Claims] (1) A cutting mechanism consisting of a cutter knife attached to an endless rotary chain extending lengthwise along the width direction center line is provided, and the cutting mechanism is placed on the left and right sides of this cutting mechanism, and is carried in with respect to the width direction center line. A left presser guide member and a right presser guide member are arranged symmetrically with a wide side and a narrow width on the unloading side and extend in the length direction. The clamp chain guide member, the right clamp chain guide member, the left clamp chain guide member, and the right clamp guide member are made to run upwardly running portions, respectively, and have long claw members that can be freely inserted into the closing band portions at both ends of the mounting. A bag opening device characterized by being provided with a presser guide mechanism consisting of an endless rotating left clamp chain and an endless rotating right clamp chain arranged in large numbers in the horizontal direction.