JPS627465Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an ultrasonic welding device for synthetic resin films.

Various proposals have been made to weld synthetic resin films using ultrasonic waves, and a practical device is the Brother ultrasonic sewing machine manufactured by Brother Industries, Ltd., which has recently been commercially available. This ultrasonic welding device is shown in Figures 1 and 2 as a whole.
As shown at 10, the ultrasonic waves generated by an oscillator 11 are transmitted to a cylindrical rotating member 13 rotated by an electric motor 12, and driven by an electric motor (not shown) to the opposite side via sheet materials 90 and 91 to be welded. spring 1
A pressing rotor 17 having various irregularities on its outer circumferential surface which is pressed by a pressure roller 6 is disposed. 18 is a lever for pulling up and holding the pressing roller 17 in a slightly raised position, and 19 is a knob for adjusting the spring 16. This device is assembled to the same external shape as a sewing machine, and the worker welds the sheet material while moving it by hand, so it is not suitable for manufacturing large quantities of bags, etc. at high speed. It was hot.

This invention solves these problems and creates a synthetic resin film that is suitable for manufacturing bags, etc. in large quantities at high speed using an ultrasonic welding device 10 as shown in FIGS. 1 and 2. The present invention provides an ultrasonic welding device.

An embodiment of this invention will be described below with reference to the drawings.

In one embodiment of this invention shown in FIGS. 3 to 7, 20 and 21 are rolls that are rotatably supported at predetermined positions, and sheet materials 90 and 91 made of synthetic resin films are wound around each roll. It can be removed by pulling it out.
The upper sheet material 90 is narrower than the lower sheet material 91, and is stretched by a pair of rolls 22, overlapped with each other, guided by rolls 23, 24, and rolled by a pair of rubber rolls 25, 24.
It narrows at 26 and is designed to be continuously delivered. Between the rolls 23 and 24, the sheet material 90, 9
A pair of ultrasonic welding devices 10 are used to form welded portions 92 that are close to each other near the center. The lower supports 28, which respectively support the rotating members 13, etc., are movably supported by a pair of horizontal and parallel guide rods 30 fixed to the main body 27, and are screwed into threaded rods 31. The position can be adjusted by operating a handle 32 provided at the outer end of the rod to move it in a direction transverse to the direction of travel of the sheet materials 90, 91. The upper support body 33 supporting the pressing roller 17 at its lower part is movably supported by a pair of horizontal and parallel guide rods 35 fixed to the main body 27, and is screwed into a threaded rod 36. This threaded rod is rotated from the threaded rod 31 through the chain 37 at the same rotational speed, and the pitch is also the same as that of the threaded rod 31.
has become the same as Therefore, the handle 32
By operating the rotating member 13 and the pressing trochanter 1
7 can be moved laterally at the same time. The rotational axis of the pressing trochanter 17 is the sheet material 90,
The pressing roller extends in a direction transverse to the traveling direction of the sheet materials 90 and 91, and this pressing roller is moved at the same speed as the traveling direction of the sheet materials 90 and 91 at the upper end surface of the rotating member 13 through the sheet materials 90 and 91. The rotating portion is pressed, and the sheet materials 90 and 91 are naturally rotated by frictional force with the sheet material 90 without being driven by an electric motor, thereby welding the sheet materials 90 and 91. The pressing trochanter 17 is made of sheet materials 90, 91
It may be rotated by an electric motor so that the delivery speed and the peripheral surface speed are the same.

38 is a shaft 40 rotatably supported at a predetermined position.
a pair of parallel levers (only one shown) fixed to the
is rotatably supported. 42 and 43 are made of rubber and are driven intermittently to send out sheet materials 90 and 91 from rolls 25 and 26 via roll 41 and rolls 45 and 46 placed at predetermined positions. In this case, even if the rolls 42, 43 are driven intermittently, the inclination of the lever 38 changes so that the sheet materials 90, 91 are always stretched. A blade 47 is arranged at a predetermined position to form a continuous cutting part 95 between each weld part 92. 48
is a welding member which descends when the rolls 42 and 43 are stopped, welds the sheet materials 90 and 91 in the transverse direction and welds both sides to form a welded portion 96, and then ascends. Therefore, two bags 97 can be obtained in one operation. 50 is a cradle; 51 is an endless belt that passes between the fusing and welding member 48 made of silicone rubber and the pedestal 50, stops when the sheet materials 90 and 91 are fusing and welding, and is then intermittently driven to send out the bag 97; 52 is an endless belt that pinches the bag 97 sent from the endless belt from above and below and sends it out. The welded portion 92 formed by the ultrasonic welding device 10 that forms the bottom of the bag 97 is extremely firmly welded, and can be completely welded even if the sheet materials 90, 91 are thick.

As the sheet material, a continuous narrow width paper is used in a part between the sheet materials 80, which are made by folding one side of a continuous synthetic resin film into a slightly longer length, as shown in FIG. 8, using a known film half-folding machine. Alternatively, a sheet material 81 consisting of the following materials may be sandwiched and supplied. In this case, one set of ultrasonic welding devices 10 is used to
The sandwiched portions are welded to form a welded part 82, and the welded part 83 is formed by welding in the transverse direction using the fusing welding member 48, so that one bag 85 can be obtained at a time. In this case, the paper 81 is double-sided and the sheet material 80
It is firmly welded. Generally, one set of ultrasonic welding apparatuses 10 or three or more sets of ultrasonic welding apparatuses 10 may be provided.

This invention can be applied, for example, to manufacturing things other than bags, such as cylindrical bodies, and the sheet materials may be one in which one welded to each other is a synthetic resin film and the other is paper.

As mentioned above, this invention has an ultrasonic welding device 10 that is adjustable and supported in a direction transverse to the feed direction of the sheet material 90, 91, etc. containing at least a continuous synthetic resin film. The welded parts 92 and the like that are continuous in the material delivery direction can be formed extremely easily, and these welded parts are firmly welded, and even if sheet materials other than synthetic resin films are used, they can be easily welded. It has the following. Therefore, there is also the advantage that it becomes very easy to produce two bags at a time or to obtain a bag partially filled with paper.

Furthermore, the pressing trochanter 17 of the ultrasonic welding device 10
In this case, a product manufactured and sold by Brother Industries, Ltd. in which the central part of the pressing surface is made to protrude and welded using ultrasonic waves, and the central part is melted and cut, may be used. It is easy to understand that two bags 97 can be manufactured at a time by simply melting and welding using one ultrasonic welding device 10 without using the blade 47 as shown in FIG. It is possible.

[Brief explanation of the drawing]

Fig. 1 is a front view schematically showing the ultrasonic welding device used in this invention, Fig. 2 is a perspective view showing the relationship between the rotating member and the pressing trochanter, and Fig. 3 is a main part of an embodiment of this invention. FIG. 4 is a front view with a part thereof cut away, FIG. 5 is a front view showing the first half of the overall arrangement, FIG. 6 is a front view showing the second half, and FIG. FIG. 8 is a plan view showing the progress of processing the sheet material in another embodiment of the invention. 10 is an ultrasonic welding device, 13 is a rotating member, 17
is a pressing trochanter, 28 is a lower support, 30 is a guide rod,
31 is a threaded rod, 33 is an upper support, 35 is a guide rod, 36 is a threaded rod, 32 is a handle, 90, 91
is the sheet material, and 92 is the welded part.

Claims (1)

[Claims for Utility Model Registration] 1. One or more ultrasonic welding devices for welding overlapping portions of sheet materials including at least continuous synthetic resin films; A rotating member that is in contact with one side of the overlapping portion and rotates at a predetermined speed to transmit ultrasonic waves, and a rotary member that pinches and presses the overlapping portion of the sheet material from the opposite side of the rotating member. A means for continuously feeding the sheet material in a predetermined direction by power, and adjusting the rotating member and the pressing trochanter in a direction transverse to the feeding direction of the sheet material. 1. An ultrasonic welding device for synthetic resin films, characterized in that a support device for supporting the film is provided. 2 Utility Model Registration Scope of Claim 1. The ultrasonic welding device for synthetic resin films as set forth in claim 1, wherein the pressing trochanter is rotated by frictional force with the sheet material by pressing the sheet material against the rotating member. An ultrasonic welding device for synthetic resin films characterized by the following features: