JPH0636907Y2 - High frequency fusion cored bar assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a cored bar assembly used when a tubular body is fused by high frequency fusion.

[Prior Art] In high-frequency fusion, for example, two opposing electrodes are arranged with a fused portion of two materials to be fused (objects to be fused) sandwiched therebetween, and a high-frequency voltage is applied to these electrodes to produce high-frequency fusion. Oscillation is performed, whereby the fusion-bonded portion of the fusion-bonded body is melted, and the fusion-bonded body is fused.

When the tubular melted object is sealed by such high-frequency fusion, the core metal is inserted into the tubular body and the counter electrode is arranged outside the sealed portion of the tubular body.
When the core metal and the counter electrode are arranged at a certain distance in this way and a high frequency voltage is applied to the core metal and the counter electrode, high frequency oscillation occurs between the core metal and the counter electrode. After the high frequency oscillation, the distance between the cored bar and the counter electrode is reduced by a predetermined amount to fuse the adherend. For example, when fusing two sheet-shaped objects to be fused and fusing a tubular body to these end portions, a sheet to be fused to the tubular body by inserting a core metal into the tubular body A counter electrode is arranged outside the object to be fused, and high frequency oscillation is performed to perform fusion.

In fusing such a tubular body to be fused, when the tubular body has directionality, it is necessary to fix the cored bar inserted in the tubular body so as not to rotate. The conventional core metal has the following structure in order to prevent rotation during fusion. That is, the cored bar has a rod-shaped cored bar with a spherical cored bar connected to the end thereof, and the spherical cored bar end and a cored bar support member fixed to a base arranged at a predetermined position. By storing the end part of the holder in the holder, and mounting the holder on the core metal support member so that the spring and the collar arranged in the holder are held by the end part and the core metal end part of the core metal support member. The core metal was supported and fixed.

In such a cored bar assembly, in order to prevent the cored bar from rotating when the force for pressing the spherical cored bar end portion against the cored bar support member via the collar and the spring is insufficient, the cored bar has a spherical shape. By providing semi-cylindrical projections for rotation prevention at the end of the cored bar and the end of the cored bar supporting member, and by disposing the planes corresponding to the cylindrical cut surfaces of these projections so as to face each other, Was prevented from rotating with respect to the core metal support member.

[Problems to be Solved by the Invention] In the conventional cored bar assembly as described above, the semi-cylindrical projections provided on the cored bar end and the cored bar support member are repeatedly formed. When deformed by dismantling and assembly, the semi-cylindrical tips of the protrusions corresponding to the bottom surface of the cylinder do not come into contact with each other in a predetermined positional relationship, that is, the plane relationship corresponding to the cut surface of the cylinder faces each other. There was an occasion. In this case, since the core metal is fixed at a distance more than a predetermined distance from the core metal supporting member due to the so-called protrusions being caught by each other, high frequency oscillation between the core metal and the counter electrode does not occur according to the conditions, and There is a problem that the fused body does not sufficiently fuse.

Further, when the position of the protrusion is distorted with respect to the core metal or the core metal support member, the rod-shaped main portion of the core metal is fixed by being displaced from the position of the predetermined axis, so that it is biased to the fusion-bonded portion of the object to be fused. There was a problem that meat was generated and the seal was not partially formed, resulting in poor sealing.

Further, when the difference between the outer diameter of the collar housed in the holder and the inner diameter of the holder is small, the core metal support member causes a spring,
When the core is fixed by pressing the collar, the collar catches on the inner wall of the holder and cannot sufficiently press the core. Therefore, there is a problem that the cored bar is fixed at a position different from a predetermined position, and the objects to be melted are not sufficiently fused.

The present invention solves the above-mentioned drawbacks of the prior art, and prevents the occurrence of improper fusion or uneven thickness of the loaned portion due to the core bar rotating or being fixed at an unfavorable position. It is intended to provide a gold assembly.

[Means for Solving the Problems] According to the present invention, a high-frequency fusion cored bar assembly has a rod-shaped cored bar and a spherical cored bar connected to the ends of the cored bar. A cored bar, a cored bar support member that is supported at a predetermined position, and fixes the position of the cored bar by pressing the end of the cored bar,
A holder for accommodating the ends of the cored bar and the cored bar supporting member that are close to each other, a collar member housed in the holder and pressed against the cored bar end, and a collar member and a cored bar support member housed in the holder The elastic member has an elastic force capable of preventing rotation of the cored bar when the cored bar is housed in the holder, and the cored bar support member has an elastic member and a collar member. The core metal is fixed by pressing the end of the core metal.

According to one feature of the present invention, the outer diameter of the collar member is smaller than the inner diameter of the holder.

According to another feature of the present invention, the holder is formed with an internal thread on its inner wall and a male thread on the outer periphery of the core metal fixing member, and the holder is attached to the core metal supporting member by screwing these screws together. It is fixed, which fixes the core.

According to still another feature of the present invention, the cored bar support member fixes the cored bar with a force capable of preventing the cored bar from rotating around its axis.

[Operation] According to the present invention, the elastic member and the collar member provided in the holder are mounted by mounting the holder for housing the ends of the core metal and the core metal supporting member that are close to each other on the core metal supporting member. The cored bar is pressed against the cored bar support member via the core to fix the position of the cored bar. Since the elastic member has an elastic force capable of preventing rotation of the cored bar, it is possible to prevent the cored bar from rotating around its axis. Therefore, the cored body can be fixed in a fixed direction and the tubular object to be fused can be fused. This allows
Even when the tubular object to be fused has directionality, the direction can be maintained and fusion can be performed.

Further, since the protrusions for preventing the rotation of the cored bar are not provided at the end portions of the cored bar and the cored bar support member, the cored bar is not fixed at an undesired position due to the tips of the protrusions being caught. The cored bar can be fixed in place. Further, the direction of the cored bar does not shift due to the protrusion being bent or distorted. Therefore, it is possible to properly dispose the cored bar at a predetermined position and sufficiently fuse the adherend.

[Embodiment] An embodiment of the cored bar assembly according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a cross section of an embodiment of a cored bar assembly according to the present invention.

As shown in the figure, the cored bar 10 is composed of a rod-shaped cored bar 12 and a spherical cored bar end 14 which is continuous with the end of the cored bar 12. The cored bar portion 12 is inserted into a tubular object to be fused, and a predetermined high-frequency voltage is applied between it and a counter electrode (not shown) to fuse the object to be fused. The cored bar end 14 is inserted into the cored bar holder 20 as shown, and is pressed against the end of the cored bar fixing member 30 inserted into the cored bar holder 20 via the spring 40 and the collar 50. .

The cored bar holder 20 has an opening 22 through which the rod-shaped cored bar 12 of the cored bar 10 is inserted, and a cylindrical hollow part for accommodating the spherical cored bar end 14, the collar 50 and the spring 40. Have. On the inner wall of the cored bar holder 20, a female screw 24 for fixing to the cored bar fixing member 30 is further formed.

A cross section taken along line II-II of FIG. 1 is shown in FIG. As can be seen from FIGS. 1 and 2, the collar 50 has a cylindrical shape,
It has a cylindrical hollow portion 52. The end of the collar 50 has a spherical cross section which is pressed against the core bar end 14 as can be seen in FIG. At the other end of the collar 50, a large-diameter cylindrical hollow portion 54 for accommodating the spring 40 is formed.

As the spring 40, one having an elastic force sufficient to prevent the rotation of the core metal 10 is used, and the spring 40 is attached to the hollow portion 54 of the collar 50 so that one end of the core metal support member 30 contacts. ing.

The cored bar support member 30 is for fixing the cored bar 10 to a predetermined position, and is fixed to a base device (not shown). A male screw 32 for fixing the cored bar holder 20 is formed at an end of the cored bar support member 30, and a female screw 24 of the cored bar holder 20 is formed.
Are screwed together.

When fixing the cored bar 10, as shown in FIG. 1, the cored bar end 14 is inserted into the cored bar holder 20 together with the collar 50 and the spring 40, and the cored bar holder 20 is mounted on the cored bar support member 30. Screw together.
When the cored bar holder 20 is screwed and fixed to the cored bar support member 30, the collar 50 is pressed by the repulsive force of the spring 40, whereby the cored bar end 14 is pressed against the cored bar holder 20. Core metal
The spring 10 is thus sufficiently pressed by the elastic force of the spring 40 and fixed in a predetermined position. Since the spring 40 having a sufficient elastic force is used, the core metal 10 is fixed in a fixed direction without rotating due to vibration or the like.

Further, since the cored bar end 14 is pressed against the spherical inner wall of the cored bar holder 20, the rod-shaped cored bar 12 of the cored bar 10 is fixed with its length direction correctly aligned with the original axial direction. . Therefore,
The cored bar portion 12 inserted into the tubular object to be fused is fixed in the correct position and direction during the fusion.

FIG. 3 shows an example of a conventional cored bar assembly. Conventionally, as shown in the same figure, semi-cylindrical protrusions 14a and 30a are provided on the core bar end 14 and the core bar supporting member 30 respectively. These protrusions 14a and 30a are mounted in the cylindrical hollow portion 52 of the collar 50 when the core metal 10 is fixed, so that the core metal 10 rotates with respect to the core metal support member 30, as shown in FIG. Was prevented.

However, the protrusions 14a and 30a are repeatedly disassembled,
When it is deformed by assembly, it does not come into contact in a predetermined positional relationship as shown in FIG. 3, that is, in a positional relationship where the planes corresponding to the cylindrical cut surfaces of the projections 14a and 30a face each other, and as shown in FIG. In some cases, the so-called projections were caught by the tips of the projections 14a and 30a corresponding to the bottom surfaces of the semi-cylindrical cylinders 14a and 30a. In this way the protrusion 14a
Since the tip of 30a and 30a is caught, the cored bar 10 is fixed at a distance from the cored bar support member 30 that is greater than the original predetermined distance, so that between the cored bar 10 and the counter electrode inserted in the object to be fused. There is a problem that the high frequency oscillation is not performed according to the conditions, and the objects to be fused are not sufficiently fused.

On the other hand, according to the above embodiment of the present invention, since the protrusions 14a and 30a as shown in FIG. 3 are not provided, the tips of the protrusions 14a and 30a are not caught as shown in FIG. , The core metal 10 is fixed in the correct position as shown in FIG.

Further, in the case where the projections 14a and 30a are provided as shown in FIG. 3, the positions of the projections 14a and 30a are respectively distorted with respect to the core metal 10 and the core metal support member 30 as shown in FIG. As shown in the figure, since the rod-shaped cored bar portion 12 of the cored bar 10 is fixed while being displaced from the position of the predetermined axis, the core metal 10 has an uneven thickness on the fusion-bonded part of the object to be fused. However, there is a problem that the seal is not partially formed, resulting in poor sealing.

On the other hand, according to the above embodiment of the present invention, since the protrusions 14a and 30a are not provided, the displacement of the cored bar portion 12 as shown in FIG. 5 due to the distortion of the protrusions 14a and 30a does not occur. Therefore, uneven thickness does not occur in the fusion-bonded portion of the body to be fused in which the core metal 10 has been inserted, and sealing failure does not occur.

Further, according to the above-described embodiment of the present invention, the difference between the outer diameter of the collar 50 housed in the cored bar holder 20 and the inner diameter of the cored bar holder 20 is set to the inner wall of the cored bar holder 20 when the collar 50 is pressed. The difference is set so that it will not be caught. Therefore, it is possible to eliminate the drawback that occurs when these differences are small. That is, by the core metal supporting member 30, the spring 40, the collar
When pressing the core 50 and fixing the core metal 10, the collar 50
Since there is no problem of being caught on the inner wall of 20 and being unable to sufficiently press the core bar end portion 14, the core bar 10 is not fixed at a position different from the predetermined position, and the fusion bonding of the object to be welded is prevented. Can be done enough.

Next, an example of concrete data of an embodiment of a cored bar assembly according to the present invention as shown in FIG. 1 and an example of a conventional cored bar assembly as shown in FIG. 3 will be shown.

Example of the present invention Conventional example Spring material SWP SWP Wire diameter φ0.5 φ0.4 Average coil diameter φ6.5 φ6.0 Total winding 7.5 winding 7.5 winding Effective winding 6 winding 6 winding Free height 14.5mm 13mm Color and holder Diameter difference 0.1 mm 0.02 mm In the conventional example based on the above data, the fusion defect occurrence rate was 1/10000 and the uneven thickness occurrence rate was 1/50000, but in the embodiment of the present invention, any occurrence rate Could also be zero.

[Advantages of the Invention] According to the present invention, since the cored bar can be fixed in a fixed direction without rotating, when a tubular object to be fused is fused, the object to be fused is oriented Even if it has a property, it is possible to carry out the fusion bonding while maintaining the direction, and it is possible to perform the appropriate fusion bonding.

Further, unlike the conventional one in which the core bar is prevented from rotating by the protrusion, since the core bar is fixed by the strength of the spring, the core bar is fixed to an inappropriate position by the deformation of the protrusion as in the conventional case. There is no problem, and the axis of the core does not shift. Therefore, it is possible to prevent defective sealing and uneven thickness, and to perform sufficient fusion bonding.

[Brief description of drawings]

1 is a sectional view showing an embodiment of a cored bar assembly according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a sectional view showing an example of a conventional cored bar assembly. 4 and 5 are cross-sectional views showing a usage state when the protrusion is deformed in the structure of FIG. 3, and FIG. 5 is a cross-sectional view showing a usage state when the protrusion is distorted in the structure of FIG. It is a figure. Description of main part symbols 10 …… Core metal 20 …… Core metal holder 30 …… Core metal support member 40 …… Spring 50 …… Color

Claims (4)

[Scope of utility model registration request] 1. A cored bar having a rod-shaped cored bar and a spherical cored bar connected to an end of the cored bar, and a cored bar supported at a predetermined position to press the cored bar end. A core metal supporting member for fixing the position of the core metal, a holder for housing the core metal and the ends of the core metal supporting member that are close to each other, and a holder housed in the holder, A collar member that is pressed into contact with the elastic member; and an elastic member that is housed in the holder and held between the collar member and the cored bar support member. The elastic member is provided when the cored bar is housed in the holder. Characterized by having an elastic force capable of preventing rotation of the cored bar, wherein the cored bar support member presses the cored bar end portion through the elastic member and the collar member to fix the cored bar. High frequency fusion core metal assembly. 2. The high-frequency fusion cored bar assembly according to claim 1, wherein the outer diameter of the collar member is smaller than the inner diameter of the holder. 3. The holder is formed with an internal thread on an inner wall thereof and an external thread on an outer periphery of the core metal fixing member, and the holder is fixed to the core metal supporting member by screwing these screws together. The high-frequency fusion cored bar assembly according to claim 1, characterized in that the cored bar is fixed thereby. 4. The utility model registration claim according to claim 1, wherein the core metal support member fixes the core metal with a force capable of preventing the core metal from rotating around its axis. The high-frequency fusion cored bar assembly described.