JPH0718563Y2 - Automatic bag sealer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an automatic sealing device for a bag body, which automatically seals the flap portion of the bag body having an adhesive layer on the flap portion.

(Prior Art) As a conventional technology, there is an automatic bag sealer disclosed by the applicant of the present application in Japanese Utility Model Publication No. 62-1054. The automatic sealing device according to this publication automates the folding and polymerizing adhesion of the flap portion, and is capable of reliably preventing the occurrence of wrinkles, distortions and the like in the flap portion, which is characterized by the first conveyor. The second conveyor arranged continuously and in the lower order is capable of carrying at least the direction opposite to the carrying direction of the first conveyor. That is, conventionally, the bag mouth is closed or sealed by rotating the second conveyor in the reverse direction. This reverse rotation command is, as described in the above publication, a limit switch, for example, provided above the second conveyor as a sensing member for sensing that the bag has been transferred onto the second conveyor. As a result, a reverse rotation command is issued at the timing when the tip of the bag is sensed.

(Problems to be solved by the invention) However, allowing the second conveyor to rotate in the forward and reverse directions impedes efficiency improvement and also causes a large electrical load fluctuation, which often causes a trouble. .

In view of the above-mentioned problems, the present invention makes it possible to automatically seal the flap portion of the bag continuously conveyed from the first conveyor without rotating the second conveyor in the reverse direction. .

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a first conveyor including an endless belt for unidirectionally transporting a bag body having a flap portion having an adhesive layer on the rear side. A second conveyor made of an endless belt which is continuous and arranged at a lower position is provided in front of the conveyor, and the bag body received from the first conveyor can be conveyed in the same direction as the conveyance direction of the first conveyor. The flap holding mechanism, which is equipped with a slider that stands by below the conveyor surface of the first conveyor outside the conveyor area and the upper surface of the second conveyor contacts through the thickness of the bag, can be moved back and forth on the second conveyor in the same direction as the conveyor direction. , The bag body is transferred from the first conveyor to the second conveyor, and the flap portion is bent at an L-shape due to the step between the first conveyor and the second conveyor. It is characterized in that the bag is stopped from being conveyed by the par.

(Function) When the bag body having the adhesive layer on the flap part is located rearward and the adhesive layer is the top surface, and the bag body is conveyed from the first conveyor to the second conveyor side, the flap part is sealed. As described in the above-mentioned Japanese Utility Model Publication No. 62-1054 of the prior art, the constructed bag automatic sealing device of the present invention has a sensing member provided above the second conveyor.
For example, when the limit switch senses the tip of the bag, that is, in the present invention, the bag is locked to the stopper on the second conveyor and the flap of the bag is
Since the flap pressing mechanism advances and bends the flap portion at the timing when the front end portion of the first conveyor is in contact with the front end portion of the first conveyor due to the step difference between the first conveyor and the second conveyor and rises in a substantially L shape, The first and second conveyors rotate in the same direction, and the flap portion is bent and sealed without rotating in the opposite direction.

(Example) An example will be described with reference to the drawings. 1 and 2
The figure shows a state in which a packaged article A is stored in a bag body 4 having a flap portion 2, where 1 is a bag mouth and 2 is a flap portion. Reference numeral 3 denotes an adhesive layer, and in many cases, the adhesive layer 3 is safeguarded by a separating material (not shown). The adhesive layer 3 is a bag 4
After storing the packaged article A in the container and peeling off the release material, the flap portion 2 is folded and polymerized on the bag mouth 1, and the flap portion 2 and the bag mouth 1 are fixed and the bag mouth 1 is sealed. It is a thing.

FIG. 3 is a side view showing the main structure of the automatic sealing device according to the present invention, and FIG. 4 is a plan view. In the figure, 5 is the first
A conveyor, 6 is a flap pressing mechanism, and 7 is a second conveyor.

The first conveyor 5 is an endless narrow belt 51, 52, 5
A drive pulley 51 provided on the drive shaft 9 driven by the motor 8 with a gap between the adjacent belts 3 and 54.
It is mounted on a, 52a, 53a, 54a and driven pulleys 51b, 52b, 53b, 54b arranged on the corresponding driven shaft 10, and rotates in the direction of arrow 11 to form a bag. The body 4 is transported. The flap presser mechanism 6 includes the narrow belts 51, 5
The shape that fills the adjacent gap of 2, 53, 54, that is, the 7th
As shown in the figure, a plurality of comb-teeth portions 14 having U-shaped tips on the tip side are provided outside the conveyance area between the upper and lower sides of the first conveyor and the second conveyor.
a, 14a, 14a, ... Forming a slider 14, and the front end of the slider 14 is fitted to the front end of the first conveyor 5, and the narrow belts are located on the upper and lower sides of the first conveyor 5, respectively. In the gap between 51, 52, 53, 54, each of the comb teeth
14a, 14a, 14a, ... and the slider 1
4 is slidable on a rail 12 provided at a position below the first conveyor 5, and the slider 14 is attached to a piston 16a of a first cylinder 16 provided at a position below the first conveyor 5.
It is formed by connecting. A slide bearing 13 is loosely fitted to the rail 12, and a metal fitting 15 for connecting the slide bearing 13 is provided at the tip of the first cylinder 16. Further, the base of the first cylinder 16 is pivotally supported on the machine frame.

The second conveyor 7 is provided with the narrow belts 71, 72, 73, 74 and the driven pulleys 71a, 72a, 73a, 74a provided on the drive shaft 18 driven by the motor 17, and the driven pulleys corresponding to the drive pulleys 71a, 72a, 73a, 74a. Driven pulleys 71b, 72b, 73b, 74b arranged on the shaft 19
The bag 4 is carried by the bag and is rotated in the direction of the arrow 22 to convey the bag 4. Springs 20 fitted in guides 21 are urged at both ends of the driven shaft 19, so that the thickness of the bag body 4 can be accommodated.

A stopper 23 is provided in the second conveyor 7 and is connected to the second cylinder 24. When the material of the bag body 4 is particularly thin and the waist is weak, the stopper 23 is acted to act the bag body. 4 is temporarily stopped and the flap pressing mechanism 6 is operated. At this time, if necessary, the second conveyor 7 can be stopped at the same time. By doing so, even if the bag body 4 is made of a thin and soft material having a weak stiffness, the flap portion 2 does not cause wrinkles, troubles such as distortion or deviation, and a uniform and beautiful seal. The finish is obtained. Further, even if the material of the bag body 4 is not particularly thin, it is possible to lock the bag body 4 to the stopper 23, temporarily stop the bag body 4 and operate the flap pressing mechanism 6 to obtain a uniform and beautiful seal. It is effective in obtaining the finish.

Next, the operating state of this device will be described. As shown in FIG.
The bag body 4 that has accommodated the packaged article A and has the flap portion 2 on the rear side and is conveyed by the first conveyor 5 with the adhesive layer 3 as the upper surface is moved to the second conveyor 7, that is, the timing shown in FIG. 2 A conventional well-known sensing member provided above the conveyor 7, for example, a limit switch (not shown) senses the tip of the bag body 4, and the first cylinder 16 operates at the timing when the bag body 4 is locked by the stopper 23. The second conveyor 7
Since the slider 14 advances onto the second conveyor 7 at a speed several steps faster than the speed of, the rear end contacts the front end of the first conveyor 5 and the flap portion 2 in the standing state has the bag mouth 1
Folded up and superposed on bag mouth 1, flap 2
Then, the bag mouth 1 is fixed, and the bag mouth 1 is sealed. (Refer to FIG. 6) In FIGS. 5 and 6, the stopper 23 operates, but this is the case where the bag body 4 is thin and is made of a soft material having a weak waist as described above. Even if it is a normal one, the action of the stopper 23 does not pose any problem, and is effective for adjusting the speed of the slider 14 and achieving the intended purpose. Also, the driven shaft of the second conveyor 7
By adjusting the position and the force of the spring 20 biased to both ends of the bag 19, the degree of narrowing of the bag mouth 1 when the bag body 4 is sealed is adjusted.

(Effects) As described above, the automatic sealing device according to the present invention can automatically seal the second conveyor without rotating it in the reverse direction, which reduces electric load fluctuations and contributes to improvement in productivity.

[Brief description of drawings]

1 is a front view of the bag body 4, FIG. 2 is a longitudinal sectional view of the bag body 4,
FIG. 3 is a side view of the main part of the automatic sealing device according to the present invention,
FIG. 4 is a plan view of a main part of the automatic sealing device, FIGS. 5 and 6 are operation explanatory views of the flap pressing mechanism 6, and FIG. 7 is a perspective view of the slider 14.

Claims (1)

[Scope of utility model registration request] 1. An endless belt provided with a first conveyor composed of an endless belt for transporting a bag body having a flap portion having an adhesive layer behind in one direction, and arranged in a continuous and downward position in front of the conveyor. The second conveyer consisting of the first conveyer is provided, the bag body received from the first conveyer can be conveyed in the same direction as the conveying direction of the first conveyer, and the outside of the conveyance range of the bag body is waited below the conveying surface of the first conveyer. A flap pressing mechanism including a slider, in which the upper surface of the two conveyors contacts through the thickness of the bag body, is provided on the second conveyor in the same direction as the transport direction so that the bag body moves from the first conveyor to the second conveyor.
The bag body is characterized in that the stopper stops the conveyance of the bag body at a position where the flap portion is bent into an L shape due to a step between the first conveyor and the second conveyor after the transfer to the conveyor is completed. Automatic sealing device.