JPH0444936A - High frequency welding apparatus - Google Patents

Abstract

PURPOSE:To downsize an apparatus and simplify positioning of a pressing member by a method wherein a pressing piece which presses a container outer periphery upper part of the apparatus which welds a synthetic resin lid having a metallic layer to a synthetic resin container is elevatable and an elastic body having said pressing piece at the lower end of its inner peripheral face is a single unit with a plurality of vertical split grooves formed. CONSTITUTION:A mount 1 for mounting a container body 11 with a lid 10 put on and a pressure applying body 2 relatively move vertically, so that the pressure applying body 2 is fit into a recess at the center of the lid 10 and the lid 10 is fit into an opening of the body 11. A cylindrical elastic body 3 is formed with a plurality of vertically split grooves 7 wherein the grooves are opened upward and downward alternately, so that the entire body can be elastically deformed uniformly. Then an assembling groove 14 is formed at the lower end, a pressing piece 5 is fitted into the groove 14, and a peripheral groove formed at the upper end is fitted into a fixed member 13 freely slidably. The elastic body 3 forms a tapered face 6 extending downward at a lower part of an outer peripheral face, a lift body 4 lowers, a pressing part 8 presses the tapered face 6 to have them welded with a container upper end part, the pressing piece 5 and the pressure applying body 2, high frequency current is made flow to a heating coil 9, and the lid and the body are welded to each other.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the opening of the body of a container made of 9 synthetic resin.

The present invention relates to a high-frequency welding device for welding a synthetic resin lid having a metal layer by high-frequency induction heating.

[Conventional technology]

A general conventional technique is shown in FIG. This is the container body 1
A mounting table on which 1 is placed. A pressure body 2 that fits into the central recess of the lid 10 to fit the lid 10 into the opening of the body 11 and welds the lid 10 and the body 11 together using the heating coil 9. and a suppressing member 16 located close to the upper end of the outer peripheral surface of the container and actuated by a drive device provided on the side thereof to press the upper end of the outer peripheral surface of the container. This pressing member 16 is divided into a plurality of parts.

In this conventional apparatus, first, a body 11 filled with contents and having a lid 10 placed on its opening is placed on a mounting table 1. Next, the mounting table 1 rises.

As the mounting table 1 rises, the pressurizing body 2 presses the upper surface of the central concave portion of the lid 10, whereby the lid 10 is fitted into the body 11. Next, with the plurality of suppressing members 16 moving forward and pressing the upper end of the container, a high frequency current is passed through the heating coil 9, and the two are welded together by induction heating.

After welding is completed, the suppressing member 16 is moved back and the mounting table 1 is lowered to take out the container.

[Problem to be solved by the invention]

The problem with these conventional devices is that the forward and backward movement of the suppressing member 16 is achieved by a drive device installed on the side of the suppressing member 16 and operating in the radial direction. This may interfere with other factors. When it comes to factories, etc., there is a dollar limit to the area in which equipment can be installed.

In order to obtain a better working environment, it is desirable to make the equipment as small as possible.

Further, in the conventional device, since the suppressing member 16 that presses the upper end of the container is divided into a plurality of parts, it is necessary to handle each part as a single unit and to perform attachment and positioning separately. Particularly in the case of 9-position alignment, each pressing member 16 must be assembled in a uniform position, which is extremely laborious and troublesome.

The present invention was devised in view of these problems, and the device is miniaturized to reduce the installation area, and the suppression member 1
The object of the present invention is to provide a high-frequency welding device that is easy to handle, such as positioning.

[A means of saving to solve problems]

As a means for this purpose, a mounting table 1. It is composed of a pressurizing body 21, an elastic body 3, and an elevating body 4.

The mounting table 1 is used to place the trunk 11 in an upright position. The pressurizing body 2 is fitted into the central recess of the lid 10 to press the lid 10 downward in order to weld the lid 10 to the opening of the body 11, and has a heating coil 9. The elastic body 3 has a pressing piece 5 at the lower end of the inner peripheral surface that presses the upper end of the outer peripheral surface of the container composed of the body 11 and the lid lO, and has a tapered surface 6 expanding downward at the lower part of the outer peripheral surface. Furthermore, it has a plurality of vertical grooves 7, is highly elastic, and can be freely reduced in diameter. The elevating body 4 has a pressing portion 8 at its lower end that presses against the tapered surface 6 of the elastic body, and is movable up and down.

[Effect]

The operation of the present invention will be explained with reference to FIG.

First, the body 11 is filled with contents and the lid 10 is placed on it.
is placed on the mounting table 1. Next, as the mounting table 1 and the pressurizing body 2 move up and down relative to each other, the pressurizing body 2 fits into the central recess of the lid 10, presses the lid 10, and fits into the mouth of the body 11. match. At the same time.

The upper end of the container is located opposite the pressing piece 5. From this state,
The elevating body 4 descends, and its pressing portion 8 presses the tapered surface 6 of the elastic body 3. Due to this pressing force, the diameter of the lower end of the elastic body 3 is reduced, and the pressing piece 5 located at the lower end presses the upper end of the outer peripheral surface of the container.

Since the elevating body 4 that operates the pressing piece 5 moves up and down in the vertical direction, the width of the device can be made smaller compared to the conventional device that moves forward and backward in the horizontal direction to actuate the pressing piece 5. Accordingly, the installation area can be reduced. Again 1
Since the elastic body 3 is a single unit formed by forming a plurality of longitudinal grooves 7 in a cylinder body, handling such as assembly and positioning is easier and more accurate compared to the conventional suppressing member 16 consisting of a plurality of pieces. It can be done.

A high frequency current is passed through the heating coil 9 while the upper end of the container is crimped between the pressing piece 5 and the pressing member 2, thereby causing the lid 1 to
The metal layer of 0 is induction heated, and the lid 10 and the body 11 are welded together by the heat.

After the welding is completed, the elevating body 4 is raised. Due to this rise, the pressure between the pressing portion 8 and the tapered surface 6 is released, and the elastic body 3
returns to its original shape due to its elasticity, and the pressing piece 5 also separates from the container. Thereafter, the mounting table 1 and the pressurizing body 2 move relatively in opposite directions, and the container that has been separated from the pressurizing body 2 remains on the mounting table 1, and finally that container is transferred to the next process. .

〔Example〕

FIG. 1 shows an embodiment of the present invention.

In this device, the mounting table 1 is movable up and down, and the pressurizing body 2 is immovably fixed, thereby achieving relative vertical movement between the two. This relative movement can also be achieved by raising and lowering only the m-pressure body 2 or both of them.

The elastic body 3 is as shown in FIGS. 2 and 3.

A plurality of longitudinal grooves 7 are formed in a cylindrical body made of an elastic material. The vertically divided grooves 7 are alternately formed with upwardly open grooves and downwardly open grooves, thereby making it easier for the entire elastic body 3 to be elastically deformed uniformly, and by reducing the diameter of its lower end. This prevents stress from acting on it.

A plurality of pressing pieces 5 are provided at the lower end of the elastic body 3.

To assemble these two, an assembling groove 14 is formed in the lower end portion of the first elastic body 3, and the pressing piece 5 is fitted into the assembling groove 14. Therefore, assembly and alignment of the two is easily and extremely accurately achieved.

Note that the pressing piece 5 can also be formed into the elastic body 3 integrally formed.

This elastic body 3 is achieved by slidably fitting a circumferential groove 15 formed in the upper end portion of the elastic body 3 to the fixing member 13. By setting the wall thickness of the fixing member 13 to be slightly smaller than the longitudinal width of the circumferential groove 15, the elastic body 3 is held by the fixing member 13 and the elastic body 3 can be elastically deformed.

The elevating body 4 is driven by an elevating device 12.

The pressing part 8 formed at the lower end of the elevating body 4 is composed of an inclined surface that joins the Taber surface 6 formed on the elastic body 3, and when the pressing part 8 descends, it presses the Taber surface 6. The pressing piece 5 is moved in the diameter reduction direction. Note that the pressing portion 8 does not need to be limited to such an inclined surface.

〔Effect of the invention〕

In this way, in the device of the present invention, the elevating body that operates the pressing piece is moved up and down in the vertical direction, so the width of the device can be made smaller compared to conventional devices that operate from the horizontal direction. Accordingly, the installation area can be reduced. This eliminates interference with other devices and improves the working environment.

In addition, since this elastic body is a single body with multiple vertical grooves formed in the cylindrical body, handling such as assembly and positioning is easy.
It is easier than the conventional suppression member consisting of multiple pieces,
In particular, positioning etc. can be performed more accurately.

[Brief explanation of drawings]

11th! 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a plan view showing the elastic body, and 3rd! ! I is a partial cross-sectional front view, No. 41! 1 is a sectional view showing a conventional technique. Explanation of symbols 1: Mounting table, 2: Pressure body, 3: Elastic body. 4: Lifting body, 5: Pressing piece, 6: Taber surface. 7: Vertical groove, 8: Pressing part, 9: Heating coil. 10: Lid, 11: Body, 12: Lifting device. 13: Fixing member, 14: Assembly groove, 15: Circumferential groove. 16: Pressing member. Applicant: Yoshino Kogyo Co., Ltd.

Claims (1)

[Claims] An apparatus for welding a synthetic resin lid (10) having a metal layer to a synthetic resin body (11) by high-frequency induction heating, the body (11) being in an upright position. In order to weld the mounting table (1) to be placed and the lid (10) to the opening of the body (11), the lid (10) is fitted into the central recess of the lid (10).
0) downward and presses the upper end of the outer peripheral surface of the container, which is composed of a pressurizing body (2) having a heating coil (9), the body (11), and the lid (10). piece (5)
It has a tapered surface (6) at the lower end of the inner circumferential surface and expands downward at the lower part of the outer circumferential surface, and further has a plurality of longitudinal grooves (7), and has a highly elastic cylindrical shape that can be freely contracted in diameter. A high-frequency welding device comprising: a body (3); and an elevating body (4) that has a pressing part (8) at its lower end that presses the tapered surface (6) of the elastic body and is movable up and down.