JPS59136240A - Device for manufacturing square-bottom bag on which bottom plate is welded - 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 provides a method for appropriately attaching one end portion of a cylindrical material made of a heat-adhesive synthetic resin film, a resin-coated film, or a heat-bondable flexible synthetic resin film such as polyvinyl chloride or polyethylene. Fold the folded pieces together and electrically connect them to form a square bottom, and press a bottom plate made of an appropriate material having a heat-adhesive resin layer on the inside of the square bottom, and then press the folded pieces together. The present invention relates to an apparatus for automatically manufacturing a square bottom bag with a bottom plate by melting a folding piece and a bottom plate inside the folding piece with matching linear or loop-shaped fused lines.

It is very time-consuming to make a square-bottomed loan with a reinforced paperboard (cardboard), etc., because the shape of the square bottom, its adhesion, and the adhesion of the bottom plate involve complicated procedures, and most of the work is done by hand. It has the disadvantage of being extremely inefficient and expensive.
Moreover, it is extremely difficult to manufacture this automatically, and there is no completed example yet.

The present invention has been able to successfully solve this difficult problem. First, to briefly explain the main points, in order to automatically manufacture a bag body having a square bottom, Okihimo has a cylindrical shape. It is preferable to use a material with a Σ-shaped cross section (Fig. 5) in which the M-shape faces the monk by providing folded portions on both sides of the material.

Now, in order to form a square bottom bag with a fused bottom plate, one end of the cylindrical material is folded in to form a square bottom, and then the bottom plate is inserted from the other end so that it touches the inside of the square bottom. It is much more convenient in terms of production if all of these operations can be done at one end of the cylindrical material, rather than by attaching 18 bottom plates to the bottom.

Moreover, as a result of many years of research, it has been found that automatic formation is an essential factor in simplifying the work process and manufacturing equipment. It is extremely difficult to figure out how to insert the bottom plate, how to place it in place, how to fold the folding pieces, and how to make the devices that perform these operations interact with each other so that they can operate. there were.

There are several known methods for forming a square bottom, but it will be understood from the following explanation that it is a method that has a good appearance and allows simple overlapping of materials to form a smooth square bottom. It will be.

The final shape of the bag adopted in the present invention is as shown in Figure 6, but the process of forming this bag will first be described in the manual order that is generally performed, regardless of the book v:, vll device d. (Fig. 7 and below), and the above-mentioned cylindrical material (A) with folded parts (B) on both sides, prepared in steps 1 to 1 by cutting to a certain length (Fig. 5).
At one end, fit together the folding pieces (C), (C) on both sides, and the folding pieces (C), (=) and (=1) on the front and back screens, and fold them in to form the corner bottom (E). Figure 7)
Next, connect the bottom plate (to) from the other end of the cylindrical material (A) to the square bottom (
(e) so as to be in contact with the bottom part (Fig. 8), and then heat-seal the bottom plate and the four folded pieces together by means of fusing 111) that engages these four folded pieces. In the end, a square bottom bag with a fused bottom plate as shown in Figure 6 (5
21 is formed.

The present invention was devised to automatically carry out the process of forming such bags, and one embodiment of the manufacturing apparatus according to the present invention will be described below with reference to the drawings.

First, let us explain the layout structure of the entire manufacturing equipment.
As shown in Fig. 4, a synthetic resin cylindrical material (A) is placed on the machine base (11) that moves back and forth intermittently in the front-rear direction, that is, in the depth direction of the paper in Figs. 1 and 2. A frame (2) for placing the machine and a hydraulic drive device (A) for controlling the intermittent reciprocating movement of the frame (2) are provided.
It corresponds to the end unstretching device for opening the end of the cylindrical material (A) placed on the mounting frame (2) in the direction of movement of the mounting frame (2) on the lateral - side of 1+. The two fixed point positions are configured to be moved back and forth intermittently by the operation of a hydraulic drive device, and the end untensioning device (Bl) is attached to the back of the end untensioning device (B).
Synthesis (bottom plate loading device (I) for loading the bottom plate (f) having a marsh fat layer) inside the terminal opening opening (g) opened at
, and the end unexpanded device (B) of the mounting frame (2) is provided.
) A terminal pressing device (E) of the cylindrical material (A) above the side end, and each of the above-mentioned folding pieces of the cylindrical material (A), (1%)
, -), (s) The end of the mounting frame (2) is not opened to accommodate the contents! * (Folding single folding device (F) formed in pairs on the top, bottom, and left and right ends of the Bl side)
1.The specific configuration of each of the above devices is as follows.

At both left and right ends of the upper surface of the machine stand (1), guide frames (1b) and (1b) for supporting the left and right ends of the mounting frame 1d (2) and slidingly guiding the frame are provided. 2)
The left and right center part of the left and right guide @lb) is bulged downward with a dimension equal to the inner diameter of (lb), and this is used as the guide frame (1b).
, (1b) to prevent left and right lateral wobbling and to be able to slide only in the front and rear directions. On the upper surface of the mounting frame (2), a groove (2a) is formed in a cylindrical material which is open upward and has a concave cross section and penetrates in the left and right direction.

The hydraulic drive device (A) fixes the hydraulic cylinder (3) on the machine base (1) with its axis along the front-rear direction, and also fixes the free end of the telescopic rod (4) on the mounting frame (2). The mounting frame (2) is fixed to the lower end of the connecting plate (6) which is attached to the front end surface using a boat (5), and is intermittently reciprocated in the front and rear direction by the operation of the hydraulic cylinder (3). This is how it is structured.

The end untensioning device t (B) is a pair of horizontal rods that project horizontally toward the machine frame fil side at a predetermined distance above and below from the vertical frame (7) erected on the horizontal side of the machine frame m. (8+, (8')
It consists of a pair of hydraulic cylinders +91, (9') with their axes aligned in the vertical direction c:! '／l-
(+01, (10') +7) The ends of the horizontal rods (sl, &') are arranged with their tips facing each other, and the horizontal guide plates (++l) , (11) were solidified, grooves t+2) and (12') along the left and right direction were formed on the surfaces of the pair of horizontal guide plates (II) and (11'), and cylindrical materials were attached to these, respectively. (A) An opening panel (11, (
13') is slidably inserted in the left and right direction, and a protrusion 1 for positioning the terminal insertion of the cylindrical material (A) is attached to the outer surface of the tip side.
14+, (141') are all provided, and each horizontal guide rod (11+, (11') has a plurality of guide shafts f15), (15/)..., (l→) on the outer surface.

(16')... and each of these guide shafts.

(15')..., (1 匈, (16')... for each horizontal frame [
g), (8') and pass through the horizontal guide frame (IO,
(Constructed in such a way as to prevent sideways movement of the
Each horizontal guide F! ! 4FII), (11') machine base (0 side end. Inside the part, each axis is connected to the open panel (
Hydraulic cylinders (17), (17') are installed along the sliding direction of +31, (13'), and the free end side of (18') is attached to the horizontal guide frame (u), (1). , the terminal insertion positioning protrusion α, which protrudes outward one inch and has its tip provided on the open upholstery plate Q3), (If).

(141') is fixed and connected to the back of both hydraulic cylinders.

It is configured so that the opening plate θ and (1) are slid by the operation of (1?').

The bottom welding device (C) is mounted on a machine base (19) disposed on the structure side of the machine base ftl, and a hydraulic cylinder ( A) is arranged, and a welded seal frame frost is attached to the tip of the telescopic rod 1211.

The bottom plate loading device (D) is a hydraulic cylinder 1241 placed on the machine base disposed on the ramming side of the machine base (1), with its axis along the sliding direction of the open tension plates (13), (1). 'e
Attach an L-shaped bottom plate etl frame (2) to the tip of the telescopic loft 1251 of this hydraulic cylinder a, and form a vent surface passing through the center of this telescopic loft (c). It communicates with the ventilation hole (to) penetrated through the bottom plate, and the other end connects the vacuum pump (not shown) and air supply unit (not shown) with a three-way switching valve (not shown). They are configured to be connected in communication via a pipe (29).

A hydraulic cylinder (31) is attached to the terminal pressing device (El is a horizontal frame integrally extended from the machine base (1) side end of the upper horizontal guide frame (11'); 30) for the cylindrical material (A). ... with its axis along the vertical direction and its expansion/contraction lot 3
Fix it so that z extends downward, and then
A groove 1: (31) is bored at the lower end of -+3'lJ, and this is a rectangular guide plate that lightly presses the end of the cylindrical material (A) placed on the mounting frame (2). (84) is constructed by fitting and fixing the upper side.
Place the lower end of the guide plate (34
), the guide rod (32a) fixed to the upper edge of the guide rod (32a), (32
a) is arranged so that it can slide freely down L through the horizontal frame ((to)) to prevent the guide plate (34) from swinging.Therefore, this guide plate (34) is attached to the mounting frame (2). The sum of the moving distance of the mounting frame (2) and the depth dimension of the mounting frame (2) is the same as y or the length H.The mounting frame (2) has a cylindrical material holder. Standing walls (2b) on both sides of the intake (2a).

(2b) is cut out to the bottom of the groove (2a) at least with the same dimension as the wall thickness of the Ail guide plate (34) at the end of the pot using an end untensioning device +B+, so that the lower side of the guide plate (34) is It is provided with cutting parts (2c) and (2) that can appropriately suppress the cylindrical material (a).

Folding single-folding device (Fl is a pair of side-folding plates (3 phrases, (85' ), a pair of upper and lower folding plates for folding () and (b) into the front and back folding pieces, 3α, [3η, and a hydraulic cylinder that controls the operation of each of these plates. However, as shown in FIG. ), (85a') are placed facing each other and the space between the tops is in a non-active state.
Open slightly wider than the front-to-back width of the l-end untensioned device 1 +
Bl 11111 is a recess formed on the support frame 13 (6) attached to the front of the machine base (ll), and the bottom welding device (cl flllll is a recess formed on the side of the machine base (1) on the side of the end untensioning device (B)). Two hydraulic cylinders 189) are disposed facing each other in the hole (38a) with their axes aligned in the reciprocating direction of the mounting frame (2).
, (39') are connected to the ends of lots 40) and (40'), respectively, so that each is a J pressure cylinder (40), (3
11r) is configured to move back and forth within a predetermined dimension from the non-operating position pupil to the center of the rear radius after the mounting frame (21ri) in the moving direction of the mounting frame. (7 hydraulic cylinders (89') located on the bottom welding device (C1 side)
39') is mounted on the slide frame (41J) that moves in and out of the recess 1 decoy, and is mounted on the slide frame (41J).
The side of the bottom welding device (C) was folded due to the arrival and departure of employees!
The cylindrical material (A) with the bottom formed by the folding plate (85mm) is configured to be able to move near and far with respect to the side of the machine base (1), and the bottom welding device (When sliding the mounting frame (2) to transport the C1 circle IK,
Remove the slide underframe (41) from the recessed hole (38a) and insert this side folding plate (35) into the underframe 1a (2).
The structure is such that a gap is formed between the end surface and the bottom of the folding plate to prevent the side folding plates from coming into contact with each other.

The slide frame (41) is configured so that it can be operated by a hydraulic cylinder (421) placed inside the machine frame FTL with its axis oriented in the left-right direction.Next is the top and bottom folding!
The folding plates 13f51 and (171 are both formed of rectangular plates whose widths on the front and back sides of the cylindrical material (A) are y'4, and the upper folding plate (support) (is the terminal). Pressing device (
Spine guide plate (34) rj11 (end unexpanded device side)
Attach its upper end to the horizontal support shaft f43i so that it can swing vertically, and fold the lower part. The distance between the boards is the lower end L.
The horizontal support shaft (441) is attached to the side surface (7) of the machine f1+ so that it can swing up and down, and both of these horizontal support shafts +43 are bent one end of +41 into an L-shape. Hydraulic cylinder +45 whose free ends are attached to the guide plate (goods) and the side of the machine base (1) with their axes aligned in the vertical direction.
1, +46) is connected to the tip of the loft (471,! Tsukuda) with a link (4 (g), gloss), and these pair of hydraulic cylinders f451, +46) are used to create upper and lower folding plates. The folding operations are performed with a one-hour lag.

The square bottom bag manufacturing apparatus of the present invention has the above-mentioned structure, and its function, that is, the function of forming the square bottom of the bag body, will be described as follows.

The above-mentioned cylindrical material (A) moves its end from the end of the mounting frame (2) toward the end unstretched device 1f (B) side, and this end unstretched device (open tension plate Q3 of Bl), (13 The lengths from the free end of the terminal insertion positioning protrusions (1+) and (14/) to the terminal insertion positioning protrusions (1+) and (14/) are equal in length, and the cylindrical material on the mounting frame (2) in the protruding state When supplied into the eye (2a), the pair of upper and lower open planks f+i, (18
') are stacked one on top of the other, and the hydraulic cylinder (
1? ), (ll), the mounting frame (21(t
Move to ill and insert the rice bar terminal positioning protrusion (14)
, (14') is inserted into the end of the cylindrical material (A) until it comes into contact with the end side of the cylindrical material (A) (FIG. 9).

Next, the guide plate (circle) of the terminal pressing device (E) comes down by the operation of the hydraulic cylinder Q (11) and touches the mounting frame (2).
) on the cylindrical J material (A)
prevents movement. At this time, the end untensioned device (B) side surface of the guide plate (34), the end untensioned device @ of the mounting frame (2)
(Bl side end face and machine fil end unexpanding device (B) [
The fUIs are located on the same vertical plane, and the innermost contact surface of the end opening (g) of the cylindrical material (a), which will be described later, is formed. 1.7 The cylindrical material (A) is placed on the mounting frame (2).
Once it is stably set in the upper predetermined position, the pair of open tension plates (13) and (1) inserted into the terminal are moved up and down by the operation of the hydraulic cylinders (9+ and (9'), respectively). As a result, the front and back sides of the terminal are expanded vertically, and are finally completely opened (Fig. 10 A 2).Then, the bottom plate loading device, on which the bottom plate has been suctioned and placed in advance, opens. The upper and lower horizontal guide plates (o) and (11) of the end untensioning device (B) are separated vertically by the operation of the hydraulic cylinder (to) and the open tensioning plate (1) The mounting frame (2) passes through the gap of (1γ).
It moves to the side and is inserted all the way inside the terminal opening (G). At this point, the three-way valve (not shown) is switched, and the communication between the air vent hole formed in the center and the vacuum pump (not shown) is cut off, and the hydraulic cylinder ) is released, and the air supply device (not shown) communicates with this small hole (2) to supply air within the width of the ventilation hole, so the bottom plate (2) is placed on the bottom plate. It is easily removed from the base of the frame and supplied to the innermost part of the terminal opening (G) (FIG. 11). When the supply of the bottom plate (to) is completed, the plate mounting frame 1 and the open tension plates 03) and (1π) are simultaneously retired to the outside of the terminal opening (g), and the folding screen appears. Side folding plate (35) of the device (F), (
By the operation of the hydraulic cylinders +39) and (a9'), the 35 pieces protrude by a predetermined distance toward the center of the longitudinal width of the mounting frame (2), so the side folding pieces (c) and (c) ) are cut inward (Fig. 12 (a)
,(b))9 Next, fold this side board (351,
(A pair of upper and lower folding plates 1361□ and 371 are two hydraulic cylinders as the 35th wheel retires), and by operating with a time difference, the horizontal support shaft (43)
, As the screen is swung from its horizontal position to the working position along the vertical direction with f441 as the center, the folding pieces (Japanese and Japanese) on the front and back screens are successively folded inward. Go ahead and fold first! The folded side pieces (C) and (C) were polymerized and folded,
A square bottom (E) with a bottom plate is formed (FIG. 1S (A)). At this time, the bottom plate mounting frame ω returns to its initial position (the position shown by the solid line in FIG. Adding a new bottom plate 1
As I entered the 1g group, the upper and lower open boards (+9).

(13') are closely polymerized with each other and are ready to receive the next cylindrical material. Next, this top and bottom folding board '3
When the 6+ and i3 forces are respectively swung to return to the horizontal position and return to the initial standby position, the mounting frame (2), with the cylindrical material (a) with a square bottom formed thereon, is activated by hydraulic pressure. By operating the cylinder (3), the bottom welding device (C) M! The cylindrical material (A) is transferred to the bottom welding device by sliding the material (A) to the bottom welding device. (The side folding plate (8) on the bottom welding device ε (9) side of 35
5. Both the operating hydraulic cylinder (39') and the outside of the recessed hole (38a) of the slide underframe (41) are moved from the side of the machine stand (1) and the end face of the underframe (2) by the movement 71 of the slide underframe (41). A transition space with a folded corner bottom is formed between the two.
The cylindrical material (A) is attached to the bottom welding device fcl (111) without the corner bottom being stuck to this folding plate (35').
11 and transported to Hesmunu (Fig. 14). When the mounting frame (2) finishes passing, the slide frame (41) is retracted into the four holes (38a) by the operation of the hydraulic cylinder (421), so this folding plate (35') is placed in the initial standby position. When the mounting frame (2) is lifted, the guide plate (34) maintains its downward position I-, and the cylindrical material (A) is conveyed while being lightly pressed. Now, when the cylindrical material (A) is moved to the position corresponding to the bottom welding device (C) by sliding the mounting frame (2),
The welding seam μ frame is moved to the mounting frame [21f
ill! The folding pieces (C), (C) on both sides that are folded and overlapped with each other, and the front and back folding pieces (C) and (C) protrude from each other, and are inserted in contact with their inner surfaces. The bottom plate (to) is this welded seal frame @ and the machine base (1)
Also, the end of the guide plate 34) is pinched between the side surfaces of the untensioned device (B) and the end surface of the mounting frame (2). (A heat fusion bond 1511 having a loop shape that engages with the yoke is formed and is integrally heat fused, and a square bottom is formed to accommodate the bottom plate at the bottom as shown in Fig. 6.) A bag @ is formed.

After that, the guide plate ((b) moves upward and returns to the initial standby position (l), and the fused tomb seal frame (■) retires and returns to the initial standby position, and the bag is lifted from the mounting frame (2). Once removed, the mounting frame (2) returns to the position corresponding to the end untightening device (B) and slides back to the position corresponding to the end untightening device (B), and one culm of the above-mentioned dyeing process is progressed continuously, and the bag body is continuously is formed.

Note that the heat-adhesive synthetic resin cylindrical material (a) used in the device of the present invention is coated with a heat-adhesive synthetic resin on both the front and back sides, as mentioned at the beginning, and has water resistance. In addition to synthetic resin films made of kraft paper, roll paper, etc., flexible synthetic resin films that can be thermally bonded such as polyvinyl chloride or polyethylene are suitable. A bag made of water-resistant paperboard or cardboard with a heat-adhesive synthetic resin layer applied to it. The production efficiency has been dramatically improved compared to the previous one, making it possible to produce in large quantities, which has the advantage of being able to provide bags at a low price. Since everything is done at one end of the cylindrical material, it is possible to simplify the work process and has the advantage that the entire device can be constructed simply and rationally, and its value in industrial use is This is an excellent invention that has made it possible to realize automatic bag making, which was thought to be impossible in the past.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway overall front view of the manufacturing apparatus of the present invention;
The figure is a partially cutaway overall side view, Figure 8 is a partially cutaway rear view, Figure 4 is a sectional view of the IV-N gland in Figure 8, Figure 5 is a cylindrical material, and Figure 6 is a square bottom. An explanatory diagram showing the folded state of the bag,
Figure 7 shows how to fold the folded piece of cylindrical material! FIG. 8 is an explanatory diagram showing a state in which the bottom plate is loaded on the bottom, and FIGS. 9 to 14 are explanatory diagrams of main parts showing the operation. . Explanation of symbols (A)...Hydraulic drive device, (B)---...
End unexpanded device, (C)...Bottom layer device, (D
)...Bottom removal loading device, (E)...Terminal pressing device, (Fl...Folding piece breaking device!, (1)...・Machine base, (2)...Placement frame, (3)...Hydraulic cylinder, +9):
r(9')...Hydraulic cylinder, +131
, (ta') ---... open veneer, ■ ---...
・There are only a few meltable seals. )...Bottom plate mounting frame, (34)...Guide plate, (3 (to), (35')...Side folding plate, 73) +, Young...Folding plate up and down, 61)...Fusion line, forceps--Square bottom bag, (A)...Tubular material, ( B)... Folding part, (C) -...- Side folding piece, (B)...
... Front and back folding pieces, (E) ... Corner bottom,
(f)・−・・Bottom plate, (g)・・・・Terminal opening.

Claims (1)

[Claims] At the same time, a cylindrical material (
An end unopening device (B) that expands and opens the end portion and back of (b) vertically is provided, and the end opening opening ( g) A bottom plate loading device that loads a bottom plate with a synthetic resin layer at the back! (A DJ is provided, an end unexpanding device for the mounting frame (2) is provided (a terminal pressing device fit (E) for pressing the end portion of the cylindrical material (A) is provided above the end on the Bl side, and the mounting frame ( 2
)'s side folding plate (35') and top and bottom folding plates on the top and bottom as well as on the left and right sides of the unexpanded device side end!
361; A folding piece folding device (F) consisting of three forces is provided, and the corner bottom (hole) is placed at a position corresponding to the other fixed point of the two fixed points on the lateral side of the machine base (11). ), as well as four fold-in pieces (C) on the front and back.
Apparatus for manufacturing bags with round and square bottoms by fusing bottom plates provided with.