JPH0790615B2 - Inserting device for flat body such as flat valve for plastic sheet bag making - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a flat sheet bag-making flat valve, marking pieces for product types, and other flat bodies.
The present invention relates to a device inserted between the edges of a plastic sheet of a layer, and more specifically, for example, a fluid such as air, liquid, powder, and other articles and a plastic sheet (film).
A flat body such as a flat valve (check valve) made of a plastic sheet (film) is continuously inserted between the edges of the two-layer plastic sheet, which is the material of the bag, in order to hermetically fill the bag made of plastic. A device for setting.

[0002]

2. Description of the Related Art Conventionally, in the case where various flat bodies such as a flat valve for sealing the above-mentioned various articles or a mark mark for the type of the enclosed article are inserted between the edges of a plastic sheet bag ,
In the case, it is between the edges of the opening of the ready-made bag or the material of the bag.
The flat bodies are manually inserted one by one between the edges at predetermined positions of the layered sheets, and then heat-bonded by a conventional method. Also, as described in Japanese Examined Patent Publication No. 51-34352.
Automatically manufacture a bag with valve sack as shown
Devices are also known.

[0003]

As described above, the work of manually inserting the flat bodies such as the valves into the predetermined positions one by one as described above is extremely complicated and inefficient. Not only is it not suitable for mass production of bags with flat bodies, etc., but it is difficult to properly insert flat bodies such as valves in predetermined positions, so it is difficult to avoid variations in the flat body insertion positions of valves etc. in each bag. However, there is a problem in that it is difficult to smoothly perform the subsequent filling work of the articles, the discrimination work of the filled articles, and the like. Also, the latter bag with valve sack is automatically manufactured.
In the case of a device that uses
There is a problem in mounting it properly.

The present invention has been researched and developed with the object of solving the above-mentioned problems, and the flat and correct flattening is automatically and continuously performed at a predetermined position between the edges of a two-layer plastic sheet which is a material for a bag. An object of the present invention is to provide a highly efficient insertion device for flattened valves such as flattened valves for plastic sheet bags, which can insert flattened bodies such as valves one by one.

[0005]

Means for Solving the Problems As means for solving the above problems and achieving the object, in the present invention, one flat plate formed by connecting a plurality of flat plates such as flat valves in series is used. A flat body feeding member that intermittently feeds the body, a flat body pressing member that intermittently holds the fed flat body at a predetermined position, and a flat sheet of one sheet that is pressed and cut into two layers. And a flat body insertion mechanism that is intermittently inserted between the edges of the plastic sheet for bag making, and the reciprocating operation plate is arranged so that the flat body insertion mechanism can be reciprocated on the front side of the flat body pressing member. And a flat cutting cutter,
The gripping claw of the cutting flat body and the opening / closing member of the gripping claw constitute the structure.
And then reciprocate the opening and closing member of the gripping claw of the cutting flat body.
When the working plate moves forward, close the grip claws to grip the cutting flat body.
Urging spring and the gripping pawl open when the reciprocating plate returns.
Then, a flat body insertion device such as a flat valve for a plastic sheet bag was developed and adopted, which was constituted by a cam member for releasing the grasping of the cut flat body .

Further, according to the present invention, in the apparatus constructed as described above, the reciprocating plate is for temporarily adhering the cut flat body inserted between the side edges of the two-layer bag-making plastic sheet to the sheet surface. A flat body insertion device such as a flat valve for a plastic sheet bag, which is characterized by having a heater, and a cam member are provided with a cam action surface for slightly opening the grip claw and a cam action surface for wide opening. In addition, a flat body insertion device such as a flat valve for a plastic sheet bag, which is characterized in that it can be moved back and forth in a direction that traverses the moving direction of the reciprocating plate, has been developed and adopted.

[0007]

According to the apparatus of the present invention configured as described above, one flat body continuously fed from the flat body feeding member is intermittently pressed by the flat body pressing member, In the meantime, it is cut as one flat body by the cutting cutter of the flat body insertion mechanism which comes back.
Simultaneously with the cutting of the flat body, the gripping claws of the flat body provided on the reciprocating motion plate opened during the backward movement are closed to grip the cutting flat body, and the reciprocating motion plate moves forward to perform the cutting. The flat body is intermittently fed in advance in advance, and is stopped 2
The layers are inserted between the edges of the plastic sheet for bag making. At the same time as the flat body is inserted, it is temporarily bonded to the inner surface of one of the plastic sheets, and after the temporary bonding is completed, the gripping claws of the flat body are slightly opened to be separated from the gripping claws and intermittently forward with the sheet. After being transferred, the reciprocating plate simultaneously starts returning, and the gripping claws of the flat body are widened as the cutting cutter returns, and then the one sheet is intermittently sent out and pressed. The cutting posture and the grasping posture of the flat body are entered, and one cycle of the flat body insertion operation is completed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings with regard to a flat valve insertion device. FIGS. 4 and 5 in the accompanying drawings show an example in which the apparatus according to the present invention is applied to an automatic continuous production apparatus for a heat-adhesive plastic sheet bag having a heat-adhesive plastic sheet flat valve (flat check valve). FIG. 3 is a schematic explanatory view showing the above, in which A is an upper and lower plastic sheet material for bag making, B is a guide roller, C is a flat valve insertion device according to the present invention, and D is a sheet S. , S is a heater for heating and bonding both sides (both sides of the bag), E is a sheet S, a heater for heating and bonding the front side or the back side of S (bottom side of the bag), F is a sheet S,
S is a drive roller for transfer, and G is a bag cutter.

As shown in FIG. 1, the flat valve insertion device C according to the embodiment of the present invention is roughly classified into one sheet of the original valve VR in which a large number of flat valves V are connected in series. Valve feeding member 1 for intermittently and continuously feeding the valve V of
The valve pressing member 2 for intermittently pressing the fed valve V and the valve V for the pressed one sheet are cut, and intermittently continuously fed from the plastic sheet material A for bag making 2 It is composed of a layered plastic sheet S for bag making and a valve insertion mechanism 3 which is intermittently inserted between the edges of S.

Next, in this embodiment, the valve delivery member 1 is intermittently operated by a transmission mechanism including a sprocket 4, a crank 5, a clutch 7 having a brake 6, which is intermittently rotated by a motor (not shown). The paired feed rollers 8 and 8 rotate in parallel with each other. The sheet-shaped continuous valve V pulled out from the original valve VR is sandwiched between the paired feed rollers 8 and 8 to hold one sheet. It is constructed so as to intermittently and continuously send out a length corresponding to the valve width, and a continuous valve is fixed at a fixed position by a photoelectric detector 9 arranged between the feed rollers 8 and the valve material VR. Is to stop.

Further, the valve pressing member 2 is provided with a through groove 10 extending in the longitudinal direction at the intermediate portion of the lower surface, which is arranged near the feed rollers 8 and 8 on the delivery side, and has a valve pressing cylinder 11 at the central portion of the upper surface. The cylinder 11 synchronizes with the intermittent feeding operation of the valve feeding member 1 to lower the valve when the valve feeding is stopped to hold the valve and to raise the valve feeding when the valve feeding is stopped. Is configured to be separated from.

Further, the valve insertion mechanism 3 is roughly classified into a reciprocating operation plate 12 arranged on the front side of the valve pressing member 2 so as to be reciprocable along the longitudinal direction thereof, and one end of the reciprocating operation plate 12. Rotating cam 1 with pivotally attached link 13
4 and an opening / closing member 1 for a gripping claw of a cutting valve V, which will be described later, arranged on the lower surface of the reciprocating operation plate 12.
6 and 6.

Although not shown, the reciprocating actuating plate 12 reciprocates by the actuating member 15 via a rail, and one valve V is connected to one valve V from the continuous valve seat. A cutter 17 for cutting and two gripping claws 18, 18 for gripping the cutting valve and transferring the two layers of bag-forming plastic sheets S, S between the edges.

That is, the valve cutting cutter 17 is
In this embodiment, the continuous valve seat, which is attached to the upper surface of the reciprocating operating plate 12 toward the inner side and is pressed by the valve pressing member 2 when the operating plate 12 is returned, passes the pressing member 2 through the continuous valve seat. It is configured to cut into one valve V in the groove 10. In addition, the two gripping claws 1 described above
The reference numerals 8 and 18 pivotally attach the base end portions of the support rods 19 erected on the operating plate 12 along the moving direction of the reciprocating operating plate 12 with a required space therebetween, and in a normal state, ,
The spring 21 is elastically biased so that the grasping claw 18,
The cutting valve V is gripped by pressing the tip of 18 to the upper surface of the reciprocating plate 12, and the two-layer plastic sheet S for bag making,
It is configured to be transferred and inserted between the edges of S.

In FIG. 1, 22 is a reciprocating working plate 1.
A heater which is arranged on the front end side of 2 and reciprocates up and down by a cylinder 23 for temporarily adhering the cutting valve V to the inner surface of the plastic sheet S for bag making by the heater. The rotating cams 14 of the actuating member 15 of the reciprocating actuating plate 12 are the rotors of the pawls 18, 18 which come into contact with the cam surfaces of the opening / closing member 16, and are disposed between the sprocket 4 and the crank 5 in the transmission mechanism. It is configured to intermittently and continuously rotate via the provided bevel gear 25.

Further, the opening / closing member 1 for the holding claws 18, 18
6 is composed of a plate-shaped cam member 26 arranged below the reciprocating plate 12, has a cam action surface 27 that opens the grip claws 18, 18 on the base end side of the inner side, and The cylinder 28 attached to the back portion is configured to be movable back and forth in a direction orthogonal to the moving direction of the reciprocating motion plate 12. Therefore, when the reciprocating motion plate 12 is returned, the trochanter 24 on the reciprocating motion plate 12 side contacts the cam action surface 27,
As shown in FIG. 2, the gripping pawls 18, 18 are rotated upward against the elastic force of the spring 21 to open the gripping pawls widely.

Next, the overall operation of the flat valve inserting device for plastic sheet bags according to the present invention having the above-described structure will be described. As described above, the valve feed member 1 (feed roller 8), the valve pressing member 2, the reciprocating motion plate 12, the grip claw 18, and the cam member 2 in this apparatus.
6, the heater 22, the plastic sheet S for bag making, and the like operate synchronously and intermittently to smoothly and reliably insert the valve.

That is, the valve for one sheet, which is intermittently sent out from the valve sending member 1, is intermittently pressed by the valve pressing member 2, and in the meanwhile, the reciprocating working plate of the valve inserting mechanism 3 is moved back. It is cut as a single valve V by a cutter 17 provided at 12.

At the same time that the valve is cut, when the reciprocating plate 12 is moved back, the valve gripping claw 18 which is largely opened by the cam acting surface 27 of the cam member 26 is the cam member 2.
When the valve 6 is retracted, the valve is elastically closed by the spring 21 to hold the cut valve, and at the same time, the reciprocating motion plate 12 moves forward to stop the valve. Insert between the edges of S and S.

The valve inserted between the edges of the seats S and S is temporarily adhered to the inner surface of the lower seat by the heater 22 while the seat is stopped, and at the same time, the cam member 26 is slightly advanced by the cylinder 28. Gripping claw 1
8 and 18 are slightly opened to release the grip of the valve, and at the same time, the reciprocating working plate 12 simultaneously returns with the cutter 17 for cutting the valve, and the cam action surface 27 of the cam member 26 enlarges the grip claws 18 and 18. After opening, after that, the cutting posture and the grasping posture of one sheet of the valve which is intermittently sent out and is pressed by the valve pressing member 2 are adjusted, and one cycle of the valve inserting operation is completed.

Further, the valve V temporarily adhered between the edges of the bag-making sheets S, S progresses with the sheets S, S, and is heated by the heaters D, D schematically shown in FIGS. S
After being fully adhered in between, and at the same time adhering both sides of the sheet that will be the bag, the bottom of the portion that will be the bag will be adhered by the heater E, and then it will be cut by a cutter G and made of a single plastic sheet equipped with a valve. The bag is manufactured continuously.

Although the main embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention. Naturally, the design can be changed. For example, the drive mechanism of the flat body feeding member 1 (feed roller 8) such as a valve and the flat body pressing member 2 such as a valve.
The drive mechanism and the like may be constituted by a cylinder, and the cutter 17 may be mounted on the bar reciprocating by the cylinder without being mounted on the reciprocating plate 12.

[0023]

Since the present invention is constructed as described above, the following effects, which are far superior to those of the above-mentioned prior art in which a flat body such as a flat valve is manually inserted, are achieved. it can.

(1) Since all steps from the step of cutting a flat body such as a flat valve to the edge of a two-layer bag-making plastic sheet can be carried out automatically and continuously, It is possible to mass-produce bags with flat bodies such as valves extremely efficiently.

(2) Since a flat body such as a flat valve can be correctly inserted at a predetermined position between the seats, and the flat body insertion position of the valve or the like of each bag does not vary. It is possible to smoothly perform the filling work of the articles, the discrimination work of the filled articles, and the like.

[0026] (3) Opening / closing member for the gripping claw of the cutting flat body
To close the cutting flat body by closing the gripping claws when the reciprocating plate moves forward.
The urging spring to be grasped and the grip when the reciprocating plate is returned
With the cam member that opens the holding claws and releases the grip of the cutting flat body
Since it has been configured, the place between the edges of the plastic sheet for bag making
It is possible to securely insert and arrange the flat body with respect to the fixed position,
The effect of (2) above can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a flat body insertion device such as a flat valve according to the present invention.

FIG. 2 is a simplified explanatory diagram showing an opening / closing operation of a grip claw of a cutting flat body.

FIG. 3 is a plan view of an opening / closing member (a plate-shaped cam member) of a grip claw of a cut flat valve.

FIG. 4 is a simplified side view showing a state in which the present apparatus is arranged in a line for an automatic continuous bag making process.

FIG. 5 is a plan view of FIG.

[Explanation of symbols]

 1 Flat body feeding member such as flat valve 2 Flat body pressing member 3 Flat body inserting mechanism 12 Reciprocating actuating plate 16 Opening / closing member for flat body gripping claw 17 Flat body cutting cutter 18 Clamping flat body gripping claw 21 Spring 22 Heater 26 Cam Member 27 Cam action surface

Claims (3)

[Claims] 1. A flat body feeding member which intermittently feeds one flat body from a flat raw fabric in which a large number of flat bodies such as flat valves are continuously provided, and the flat body fed out is intermittently placed at a predetermined position. And a flat body pressing mechanism that cuts the pressed flat sheet and also intermittently inserts it between the edges of the two-layer bag-making plastic sheet. and a reciprocating plate which the該扁Heitai insertion system, is reciprocably disposed in front of the flat body pressing member,
A cutter for cutting a flat body, a gripping claw of the cutting flat body, and an opening / closing member for the gripping claw .
Open and close the grip claw and close the grip claw when the reciprocating plate moves forward.
Urging spring that grips the cutting flat body and reciprocating operation
When the moving plate returns, open the gripping claw to release the grip of the cutting flat body.
A flat body insertion device such as a flat valve for a plastic sheet bag, which is configured by a cam member . 2. A reciprocating working plate is a two-layer plastic bag for bag making.
The cut flat body inserted between the edges of the sheet
A flat body insertion device such as a flat valve for a plastic sheet bag according to claim 1, further comprising a heater for temporarily adhering . 3. The cam member has a cam function of slightly opening the grip claw.
Surface and a cam action surface that opens greatly, and reciprocating operation
It is constructed so that it can move back and forth in the direction that crosses the moving direction of the plate.
Inserted device of the flat member, such as a plastic sheet bag for flat valve according to claim 1, characterized in that there.