JPS5852892B2 - How to do it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention proposes that a bag, such as a jute bag, cannot be held in an independent state when empty, and that if the bag is formed by closing the bag opening immediately after filling, the strength of the bag opening will be reduced. The present invention relates to an automatic filling and packaging machine for sewing an insufficient bag by closing the bag opening in a folded state.

To explain this with reference to the illustrated embodiment, reference numeral 1 denotes a machine frame of a packaging machine, and the machine frame 1 has a conveyor belt 2 located at the bottom for intermittently conveying bags from a first station to a fourth station, which will be described later. A transfer bar 3 is provided with a movable holding arm located at the top and holding a bag opening, which will be described later.
3 is installed parallel to the conveyor belt 2.

A filling port 4 having an automatic metering and feeding device for raw materials (not shown) is located above the first station a at the forefront of the conveyance band 2 and is opened downwardly, and a filling port 4 is provided at the top of the first station a at the forefront of the conveyance belt 2. A supported first bag opening holding device 5, a bag opening device 6 located on the side thereof, and a bag feeding device 7 are provided, and the bag feeding device 7 holds several jute bags A as shown in FIG. A case 9 in which the sheets are piled up and one side is launched by a cylinder 8, and a swingable vacuum pad which attracts one jute bag A by launching the case 90 and transports it to just below the filling port 4 by the cylinder 10. 11, and the first bag opening holding device 5 is formed of the bar 3 in order to hold both front and back sides of the upper part of the bag A fed by the bag feeding device 7.
, 3, with two clamps supported on each axis.
2, 12 . A pad 15 for holding both sides of the bag is supported at the tip of the bag 12 via a spring 16, and is thus provided so that it can follow the upper part of the bag as it bulges due to filling. The bag opening opening device 6 is advanced by a cylinder 17 toward the center of both sides of the bag A held by the bag opening holding device 5, and when it attracts the center of both sides of the bag A and opens it, its tip is slightly lowered. Vacuum pad 1 guided by guideway 18 to obtain
It is formed from 9.

Further, as shown in FIG. 4, a second station b adjacent to the first station a of the conveyance belt 2 is provided with a second bag opening holding device 20 which is obstructed by the machine frame 1 at a position lower than the transfer bars 3, 3. , a bag opening bending device 21 is provided above the side thereof, and the second bag opening holding device 20 is formed by moving the first bag opening holding device 5 onto a second station b by means of a cylinder 22. It is formed of an arm 23 that holds the lower part of the bag opening of the bag held by this on both front and back sides, and a cylinder 24 that opens and closes the arm 23, and the bag opening bending device 21 A gripping piece 25 that grips both sides of the intermediate outer side of the bag opening held by the opening holding device 20 below the mouth edge to open the bag opening from side to side; A bending plate 26 that folds down and folds the mouth edge; a rod 27 that is inserted into the center of the bag opening that is folded by the bending plate 26 and opens left and right and moves it back and forth to close the bag opening again;
As shown in FIG. 5, the gripping piece 25 is opened and closed when the piston rod 28, which pivotally supports its intermediate portion, slides against the first bracket 29, which pivotally supports its left and right sides. Further, when the second bracket 30 that pivotally supports the bending plate 26 moves backward with respect to the stopper 31, the bending plate 26 comes into contact with the second bracket 30 and falls down, so that the gripping piece 25 of the first bracket 29 is located behind the bending plate 26. The second bracket 30 is slidably attached via a first spring 32 to the second bracket 30 so that the stopper 31 is retracted until The rod 28 passes through the first and second brackets 29 and 30, and its cylinder 35 is fixed on a pedestal 33, which is attached to the side of the machine frame 1. protruding table 36
It is provided so that it can be slid on.

Further, the rods 27, 27 are vertically movably fitted into the ends of a pair of arm rods 39, 39 provided so as to be able to slide on the transfer bars 3, 3 by means of a crank arm 38 connected to the cylinder 37. its base end into cylinder 4
A bracket 42 is connected to a horizontal vertical moving plate 41 connected to a horizontal vertical movement plate 41 so as to be movable in the front and back direction, and to which these cylinders 37 and 40 are attached. ing.

Further, in the third station C adjacent to the second station b of the conveyance belt 2, a label supply device 43, a bag opening transfer device 44, and a bag opening sewing device 45 are sequentially installed from the front to the rear thereof. A label feeding device 43 is provided so as to stack several labels B and stop intermittently facing a case 47 which is advanced by a cylinder 46, and the front surface of the case 47 and the bag opening transfer path. The bag opening transfer device 44 further includes a pair of left and right endless chines 50 that sandwich the bag opening closed by the rods 27 and 27 from both sides by the movement of the bracket 42.
50 and a pressing plate 51.51 that presses the chino 50 from the outside.
Furthermore, the bag opening sewing device 45 is formed of a □-thin that moves when it senses the passage of the bag.

In the figure, reference numeral 52 indicates a torque motor that drives the conveyance belt 2.

Next, the operation will be explained. By the operation of the bag supply device 7 by the swinging of the vacuum pad 11, the bags A are supplied one by one to the first station a on the lower surface of the z filling port 4, and at the station a, the bags A are Due to the operation of the first bag opening holding device 5 upon closing, the bag is held as shown by the solid line in FIG.
The bag is opened as shown by the dotted line in the figure by the operation of the bag opening device 6 based on the approach of the bag 2 and the movement of the vacuum pad 19, and a fixed amount of filling material is filled into the bag from the filling port 4.

At this time, the vacuum pad 19 hangs down from the bag and retreats, and at the same time the front and rear arms 12, 12 are separated by the cylinder 14, and the bag opening is closed.

Next, by actuating the cylinder 22, the first bag opening holding device 5 is slid on the transfer bars 3, 3, and at the same time the conveyance belt 2 is moved.
When moving the bag A is moved to the second station b.

In the second station /b, the second bag opening holding device 20 is operated by the swinging of the arm 23 to hold the bag A, and at the same time the first bag opening holding device 5 is released and moved to the first station a by the operation of the cylinder 22. fall back.

Next, as the base 33 moves, the gripping piece 2 comes into contact with the side surface of the bag A.
5, the rod 28 is moved back by the actuation of the cylinder 35, and the bag is moved back while holding both sides of the bag at a predetermined position, and the bag is opened laterally, and at the same time, the bending plate 26 is moved to the stopper 3 at a predetermined position.
1, it falls into the opening and bends the upper edge of the bag opening inward, and at the same time the second bag opening holding device 20 is opened and the rods 27, 27 are lowered and inserted into the bag opening by the actuation of the cylinder 40. Then, the cylinder 37 is operated to slide the rods 27, 27 in the front and rear directions, thereby closing the bag opening with the rim folded in.

In this state, the cylinder 22 and conveyance belt 2 are operated again,
The closed bag A is conveyed to the third station C via the rod 27.27.

At the third station C, the bag opening is held and transferred by the bag opening transfer device 44 which moves at the same speed as the conveyance belt 2, and a label is attached to the outside of the bag opening by the label feeding device 43 which moves at the same time. , at this time, the rod 27 is pulled out by the operation of the cylinders 37 and 40, and the rod 27 is further pulled out by the operation of the cylinders 37 and 40
2, the sewing device 4 is returned to the second station b.
5 is operated by a detector which detects the passage of the bag opening, and the bag is transferred to the fourth station d to complete the packaging while the bag is being sewn.

In this way, according to the present invention, the first station a provided in the front along the conveyance belt 2 has a bag supplying device 7 for supplying cloth bags to the lower part of the filling port 4 opened at the upper surface thereof, and an opening for the bags to be supplied. A first bag opening holding device 5 that holds both front and rear ends of the rim and is movable at a second station b behind it, and a bag opening opening device 6 that opens the held bag opening to the left and right sides are provided. Because of this, the edges of flexible cloth bags such as jute bags that do not sit comfortably can be held accurately and filling can be carried out smoothly.
There is a second bag opening holding device 5 which holds the bag opening in place of the first bag opening holding device 5.
A bag opening folding device 21 is held with the bag opening holding device 20 and tilts into the bag opening while opening the bag opening and folds the rim of the bag opening inward.
and a bag opening closing rod 27.27 that is inserted into the folded bag opening and moves in the front and back direction to close the bag opening, so that the flexible bag opening can be secured to the rim of the bag without hanging down. Further, a third station C behind the second station b includes a label supply device 43 for pasting a label on the side of the bag opening closed by the rods 27, 27. A bag opening transfer device 44 that pinches and conveys the bag opening, and a bag opening sewing device 45 that severs the bag opening to be transferred.
Since label attachment and sewing are performed simultaneously, the sewing can be done extremely quickly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a side view, FIG. 3 is a sectional view taken along line A-A in FIG. B-line sectional view, Figure 5 is Figure 4 c-c
6 is a sectional view taken along a line in the first drawing. 4...Filling port, 6...Bag opening device,
7...Bag feeding device, 21...Bag opening folding device, 45...Bag opening sewing device.

Claims (1)

[Claims] 1. First, second, and third stations are provided from the front to the rear along the conveyance belt, and the first station is supplied with a bag supply device that supplies cloth bags to the lower part of the filling port that opens on the top surface of the first station. A first bag opening holding device that holds both front and rear ends of the mouth edge of the bag and is movable at a second station, and a bag opening opening device that opens the held bag opening to the left and right sides, and the second station a second bag opening holding device that holds the bag opening in place of the first bag opening holding device; and a bag opening folding device that opens the held bag opening and tilts into the bag opening and folds the edge of the bag opening inward. A label supply device includes a bending device and a bag opening closing iron that is inserted into the folded bag opening and moves in the front-rear direction, and further supplies a label to the third station to attach a label to the side surface of the bag opening closed by the bag opening. An automatic filling and packaging machine characterized by being provided with a bag opening transfer device that clamps and conveys the bag opening, and a bag opening forming device that sews the bag opening that is being transferred.