JPH0617189U - High frequency heating coil body - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Even if the type, shape, and size of the work change, the gap between the work and the heating coil is maintained at a predetermined value, and the coil side plate does not need to be replaced. [Structure] In the heating coil body, a spacer set 100 is attached to the coil side plate in order to keep a constant gap distance between the heating coil supported from the coil side plate and the work, and the spacer set is a spacer chip 10 that contacts the work. And a spacer chip holder 20. The spacer tip has a contact portion 11 whose tip comes into contact with the work, a shaft portion 12 integrally formed with a tooth 13 on one side surface, and a bolt hole 14, and the spacer tip holder has teeth that mesh with the tooth 13. A holder base 24 on which 21 is formed, a protrusion 23 protruding from the holder base 24, and an oval bolt hole 22 are provided, and the coil side plate is provided with a notch with which the protrusion 23 engages. The teeth of the spacer chip are meshed with the teeth 21 of the fixed holder base, and the bolts 18 are inserted into the bolt holes 14 and 22 to fix the spacer chip to the spacer chip holder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-frequency heating coil body provided with a high-frequency heating coil supported by a pair of coil side plates, and more particularly to a high-frequency heating coil body that does not require replacement of the coil side plates even when the type of work is changed.

[0002]

[Prior art]

 Hereinafter, a conventional technique will be described with reference to the drawings. 4 and 5 are drawings for explaining an example of a conventional high-frequency heating coil body for heating a crankshaft (hereinafter, the high-frequency heating coil body is also simply referred to as a heating coil body). FIG. 4 shows a spacer chip. FIG. 5 is a front explanatory view of the coil side plate in the attached state, and FIG. 5 is a front explanatory view of the coil side plate. I picked up the crankshaft journal as a work.

As shown in FIG. 5, the coil side plate 1 is provided with a bolt hole 3 for fixing the spacer chip 5 with a bolt (not shown), and as shown in FIG. 4, each of the coil side plates 1 and 1 is provided. Has three spacer chips 5 attached by bolts 6. The lower part of each of the pair of coil side plates 1, 1 made of metal or insulating and arranged in parallel and opposite to each other is connected to the crankshaft journal J via the three insulating spacer chips 5. It has been placed. Between the central spacer 5 and the spacer chips 5 on both sides, a semi-open type heating coil C supported by the coil side plates 1, 1 via a member (not shown) is arranged. . Incidentally, 4 is a bolt hole into which a bolt (not shown) used for fixing the coil side plates 1 is inserted.

[0004]

[Problems to be solved by the device]

 The conventional heating coil body described above has the following problems. That is, when the type of work is changed, for example, when the diameter of the crankshaft journal J is changed from 40 mm to 35 mm, the gap distance between the heating coil C and the journal J is set to the optimum value for high frequency heating of the journal J. In order to maintain the value of, for example, 0.5 mm, the spacer 5 had to be removed from the coil side plates 1, 1 and replaced with a coil side plate having a size and shape corresponding to the journal J having a diameter of 35 mm. Therefore, when the type of work changes, it takes time to replace the spacer and the coil side plate.

The present invention has been made in view of the above circumstances, and it is possible to easily set the gap distance between the work and the heating coil even when the type, shape, or size of the work changes within a predetermined range. It is an object of the present invention to provide a heating coil body that can be maintained at a predetermined value and does not require replacement of coil side plates.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the heating coil body of the present invention comprises a pair of substantially parallel coil side plates arranged in parallel and facing each other, and a semi-open type high frequency wave supported by the coil side plates. A high-frequency heating coil body comprising: a heating coil; and a spacer set attached to the coil side plate to keep a constant gap distance between a work heated by the heating coil and the heating coil. The spacer set includes a spacer chip that comes into contact with the work, and a spacer chip holder that is fixed to the coil side plate and that is mounted so that the spacer chip can move back and forth in the direction of the work.

Further, the spacer chip is a substantially rectangular parallelepiped in which a tip is in contact with a work, and a plurality of parallel first linear teeth are formed integrally with the contact part on one side surface. The spacer chip holder includes a plurality of parallel linear second teeth that mesh with the first teeth and has a first shaft portion and a first bolt hole that penetrates the shaft and the first teeth. A holder base on which teeth are formed, a substantially U-shaped projection protruding from the holder base so as to surround the shaft when the first tooth is engaged with the second tooth, and the second tooth A holder base fixed to the coil side plate, comprising an oval second bolt hole penetrating the holder base, and the coil side plate having a notch into which the protrusion is inserted and engaged. After engaging the first tooth of the spacer tip with the second tooth of the It is preferable that bolts are inserted into the first and second bolt holes to fix the spacer chip to the holder base.

[0008]

【Example】

 Hereinafter, a heating coil body according to an embodiment of the present invention will be described with reference to the drawings. 1 to 3 are drawings for explaining the present embodiment, FIG. 1 is an exploded perspective view of a spacer set, FIG. 2 is a front explanatory view of a heating coil body, and FIG. 3 is a front explanatory view of a coil side plate. is there. As the work, the crankshaft journal was picked up as described in the conventional technique.

As shown in FIG. 2, the heating coil body of this embodiment includes a pair of substantially parallel coil side plates 30 and 30 arranged in parallel and facing each other, and lower portions of the coil side plates 30 and 30. A semi-open type heating coil C disposed on the coil side plate and supported by the coil side plates 30 and a constant air gap distance between the crankshaft journal J heated by the heating coil C and the heating coil C. Therefore, the coil side plates 30 and the spacer set 100 attached to the plate 30 are provided.

As shown in FIG. 1, the spacer set 100 is fixed to the spacer chip 10 made of ceramic or the like that contacts the journal J and the coil side plates 30 and 30, and the spacer chip 10 can be moved back and forth in the direction of the journal J. And a spacer chip holder 20 attached to the.

The spacer chip 10 has a contact portion 11 whose tip contacts the work piece on the journal J, and a plurality of parallel linear teeth 13 (first teeth) formed integrally with the contact portion 11 on one side surface. And a circular bolt hole 14 (first bolt hole) penetrating the shaft portion 12 and the tooth 13.

As shown in FIG. 2, the spacer chip holder 20 includes a holder base 24 on which a plurality of parallel linear teeth 21 (second teeth) that mesh with the teeth 13 of the spacer chip 10 are formed. When the teeth 13 are meshed with the teeth 21, the U-shaped projections 23 are provided on the holder base 24 so as to approach the shaft portion 12 and surround the shaft portion 12, and the length that penetrates the teeth 21 and the holder base 24. A circular bolt hole 22 (second bolt hole) is provided. Reference numeral 25 is a screw hole into which a bolt (not shown) for fixing the spacer chip holder 20 to the coil side plates 30, 30 is inserted. Further, 18 is a bolt which is inserted into the bolt holes 14 and 22 when the spacer chip 10 is attached to the spacer chip holder 20, and 19 is a nut which is screwed into the bolt 18.

As shown in FIG. 3, a substantially semicircular cutout 31 is provided in the lower portion of the coil side plates 30 and 30 in order to provide a space for accommodating the journal J of the crankshaft and the heating coil C. In the peripheral portion of the notch 31, three substantially notches 32 into which the protrusions 23 of the spacer chip holder 20 are inserted and engaged are extended. Reference numeral 33 is a bolt hole into which a bolt (not shown) for fixing the spacer chip holder 20 to the coil side plates 30, 30 is inserted. Further, 34 is a bolt hole into which a bolt (not shown) used when connecting the coil side plates 30 is inserted.

To attach the spacer set 100 to the coil side plates 30 and 30 supporting the heating coil C at the bottom, first insert the protrusions 23 of the spacer chip holder 20 into the notches 32 of the coil side plates 30 and 30. Then, insert a bolt (not shown) into the bolt hole 33 and screw it into the screw hole 25 to fix the spacer chip holder 20 to the coil side plates 30 and 30.

Next, after inserting the bolt 18 into the bolt holes 14 and 22, the spacer chip 10 is moved in the direction of arrow A so that the tooth 14 closely approaches the tooth 21 of the spacer chip holder 20, and then the spacer The tip 10 is moved in the direction of arrow B so that the gap distance between the heating coil C and the crankshaft journal J becomes a predetermined value. After this, when the nut 19 is screwed into the bolt 18 and tightened, the spacer chip 10 is fixed to the spacer chip holder 20. In this state, when the gap distance between the heating coil C and the journal J is not a predetermined value, the nut 19 is loosened to disconnect the teeth 11 and 12, and then the spacer tip 10 is appropriately moved in the direction of arrow B. Move it by the distance of and tighten the nut 19 again.

[0016]

[Effect of device]

 As described above, the spacer chip of the heating coil body according to the first aspect is attached so as to be movable back and forth in the work direction. Therefore, in this heating coil body, even when the type and shape of the work change and the air gap distance between the heating coil and the work changes, the spacer chip is moved in the direction of the work to adjust the air gap distance to a predetermined value. Since there is no need to replace the spacer chip and the coil side plate when the type and shape of the work change, unlike the conventional case.

Further, in the heating coil body according to the second aspect of the present invention, the spacer chip and the spacer chip holder are fixed to each other by a bolt so that a plurality of parallel linear teeth formed on the spacer chip and the spacer chip holder are engaged with each other. The bolt hole of the spacer chip holder through which is penetrated is formed in an oval shape so that the spacer chip can be moved toward the workpiece. Further, a substantially U-shaped projection is provided on the holder base so as to surround the shaft portion of the spacer chip when the first tooth is engaged with the second tooth.

Therefore, in the heating coil body according to the second aspect, the effect of the heating coil body according to the first aspect can be enjoyed, and the shaft portion of the spacer tip is surrounded by the protrusion of the spacer tip holder. Therefore, the spacer chip will not be displaced by the force received from the left and right directions. Further, the adjustment of the position of the spacer chip by loosening the bolt can be performed from the outside of the coil side plate, which facilitates the adjustment work.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a spacer set of a heating coil body according to an embodiment of the present invention.

FIG. 2 is a front view showing a heating coil body according to an embodiment of the present invention.

FIG. 3 is a front explanatory view of a coil side plate of the heating coil body according to the embodiment of the present invention.

FIG. 4 is a front explanatory view of a conventional heating coil body.

FIG. 5 is a front explanatory view of a coil side plate of a conventional heating coil body.

[Explanation of symbols]

 10 Spacer chip 11 Contact part 12 Shaft part 13, 21 Tooth 14, 22 Bolt hole 18 Bolt 19 Nut 20 Spacer chip holder 23 Protrusion 24 Holder base 30 Coil side plate C Heating coil J Journal

Claims (2)

[Scope of utility model registration request] 1. A pair of substantially flat coil side plates arranged in parallel and facing each other, a semi-open type high frequency heating coil supported by the coil side plates, and a work heated by the heating coil. A high-frequency heating coil body including a spacer set attached to the coil side plate for maintaining a constant gap distance between the heating coil and the heating coil, wherein the spacer set includes a spacer chip that contacts a workpiece, and the coil. A high frequency heating coil body, comprising: a spacer chip holder fixed to a side plate and having the spacer chip mounted so as to be capable of advancing and retracting in the direction of a work. 2. The spacer chip is a substantially rectangular parallelepiped having a contact portion whose tip comes into contact with a work, and a plurality of parallel first linear teeth formed integrally with the contact portion on one side surface. A spacer chip holder having a plurality of parallel linear second teeth that mesh with the first teeth, and a first bolt hole penetrating the shaft portion and the first teeth. A holder base on which teeth are formed, a substantially U-shaped projection provided on the holder base so as to surround the shaft when the first teeth are meshed with the second teeth, and the second teeth A second bolt hole having an oval shape penetrating the holder base, and the coil side plate having a notch into which the protrusion is inserted and engaged, the holder base fixed to the coil side plate. After engaging the first tooth of the spacer tip with the second tooth, The high-frequency heating coil body according to claim 1, wherein a bolt is inserted into the bolt hole of 2 to fix the spacer chip to the holder base.