JP2508925Z - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating coil body having a high-frequency heating coil supported by a pair of coil side plates, and more particularly to a high-frequency heating coil body even when the type of a workpiece changes. The present invention relates to a high-frequency heating coil body that does not require replacement of a coil side plate. 2. Description of the Related Art A conventional technique will be described below with reference to the drawings. 4 and 5 are views 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. FIG. 5 is an explanatory front view of the coil side plate in a folded state, and FIG. 5 is an explanatory front view of the coil side plate. I picked up the crankshaft journal as the work. As shown in FIG. 5, a bolt hole 3 for fixing the spacer chip 5 with a bolt (not shown) is formed in the coil side plate 1, and as shown in FIG. Has three spacer chips 5 attached by bolts 6. A lower portion of each of a pair of coil side plates 1, 1 made of metal or insulating and arranged in parallel and opposed to each other is connected to a crankshaft journal J via the three insulating spacer chips 5. It is placed. A semi-open heating coil C supported by the coil side plates 1 and 1 via a member (not shown) is disposed between the center spacer 5 and the spacer chips 5 on both sides. In addition,
Reference numeral 4 denotes a bolt hole into which a bolt (not shown) used for fixing the coil side plates 1 is inserted. [0004] The above-mentioned conventional heating coil has the following problems. That is, when the type of work changes, for example, the diameter of the journal J of the crankshaft is 40 mm.
When the distance is changed from 35 mm to 35 mm, the spacer 5 is removed from the coil side plates 1 and 1 in order to keep the gap distance between the heating coil C and the journal J at a predetermined value optimal for high-frequency heating of the journal J, for example, 0.5 mm. It had to be replaced with a coil side plate of the 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 even when the type, shape, or size of a work changes within a predetermined range, the gap distance between the work and the heating coil can be easily determined by a predetermined distance. It is an object of the present invention to provide a heating coil body that can be maintained at a value and does not require replacement of a coil side plate. [0006] In order to solve the above problems, a heating coil body according to the present invention includes a pair of substantially flat coil side plates disposed so as to be parallel and opposed to each other. A semi-open high-frequency heating coil supported from the coil side plate, 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. In the provided high-frequency heating coil body, the spacer set includes a spacer chip that comes into contact with a work, and a spacer chip holder that is fixed to the coil side plate and is attached so that the spacer chip can move forward and backward in the direction of the work. ing. [0007] The spacer chip has a substantially rectangular parallelepiped shape in which a tip is in contact with the workpiece, and a plurality of linear first teeth are formed integrally with the contact and formed on one surface side. The spacer chip holder has a shaft portion and a first bolt hole penetrating the shaft portion and the first tooth, and the spacer chip holder has a plurality of parallel second teeth meshing with the first tooth. A substantially U-shaped protrusion protruding from the holder base so as to surround the shaft when the first tooth is engaged with the second tooth; a second tooth and the holder; And a second bolt hole having an oval shape penetrating through the base, and the coil side plate includes a notch into which the projection is engaged and inserted, and the second side of the holder base fixed to the coil side plate is provided. After engaging the first teeth of the spacer chip with the teeth, the first and second A bolt is inserted into the bolt hole of the spacer to fix the spacer chip to the holder base. An embodiment of the present invention will be described below with reference to the accompanying 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, a crankshaft journal was used in the same manner as in the description of the prior art. As shown in FIG. 2, the heating coil body according to the present embodiment has a pair of substantially flat coil side plates 30, 30 disposed so as to face each other in parallel, and lower portions of the coil side plates 30, 30. And a semi-open heating coil C supported by the coil side plates 30 and 30 and a gap distance between the heating coil C and a journal J of a crankshaft heated by the heating coil C. And a spacer set 100 attached to the coil side plates 30. As shown in FIG. 1, a spacer set 100 includes a spacer 10 made of ceramic or the like in contact with the journal J and fixed to the coil side plates 30, 30 so that the spacer chip 10 can move forward and backward in the direction of the journal J. And a spacer chip holder 20. The spacer chip 10 has a contact portion 11 whose tip contacts the journal J, and a plurality of parallel linear teeth 13 (first teeth) formed integrally with the contact portion 11 and on one side surface.
Are formed, and a substantially rectangular parallelepiped shaft portion 12 and a circular bolt hole 14 (first bolt hole) penetrating the shaft portion 12 and the teeth 13 are provided. As shown in FIG. 2, the spacer chip chip holder 20 includes the spacer chip 1
A holder base 24 formed with a plurality of parallel linear teeth 21 (second teeth) meshing with the zero teeth 13; and a shaft part 12 approaching the shaft portion 12 when the teeth 13 are meshed with the teeth 21. An O-shaped projection 23 protruding from the holder base 24 so as to surround the portion 12, and an oval bolt hole 22 (second bolt hole) penetrating the teeth 21 and the holder base 24.
And Reference numeral 25 designates the spacer chip holder 20 as the coil side plate 30,
This is a screw hole into which a bolt (not shown) for fixing to 30 is inserted. Reference numeral 18 denotes a bolt inserted into the bolt holes 14 and 22 when the spacer chip 10 is attached to the spacer chip holder 20. Reference numeral 19 denotes a nut screwed into the bolt 18. As shown in FIG. 3, a substantially semicircular notch 31 is formed below the coil side plates 30 to provide a space for accommodating the journal J of the crankshaft and the heating coil C. At the periphery of the notch 31, three notches 32 of a substantially rectangular shape into which the projections 23 of the spacer chip holder 20 are inserted and engaged further extend. Reference numeral 33 denotes 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. Also,
Reference numeral 34 denotes a bolt hole into which a bolt (not shown) used for connecting the coil side plates 30 is inserted. The spacer sets 1 are provided on the coil side plates 30, 30 supporting the heating coil C at the lower part.
First, the protrusion 23 of the spacer chip holder 20 is inserted into and engaged with the notch 32 of the coil side plates 30, 30, and then a bolt (not shown) is inserted into the bolt hole 33 and screwed into the screw hole 25. Then, the spacer chip holder 20 is fixed to the coil side plates 30, 30. Next, after the bolts 18 are inserted into the bolt holes 14 and 22, the spacer chip 10 is moved in the direction of arrow A so that the teeth 14 closely approach the teeth 21 of the spacer chip holder 20. 10 is moved in the direction of arrow B so that the gap distance between the heating coil C and the journal J of the crankshaft becomes a predetermined value. Thereafter, 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 release the connection between the teeth 11 and 12, and the spacer chip 10 is appropriately moved in the direction of arrow B. And the nut 19 is tightened again. As described above, the spacer chip of the heating coil body according to the first aspect is attached so as to be able to advance and retreat in the direction of the work. Therefore, in this heating coil body, even when the type or shape of the work changes and the gap distance between the heating coil and the work changes, the gap distance is adjusted to a predetermined value by moving the spacer chip in the direction of the work. Therefore, there is no need to replace the spacer or the coil side plate when the type or shape of the work changes, as in the related art. In the heating coil body, the spacer chip and the spacer chip holder are fixed to each other by bolts so that a plurality of parallel linear teeth formed on the spacer chips are engaged with each other. The bolt hole of the holder is formed in an oval shape so that the spacer chip can move in the direction of the work. 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 meshed with the second tooth. Therefore, in this heating coil body, since the shaft portion of the spacer chip is surrounded by the protrusion of the spacer chip holder, the spacer chip is not displaced by the force received from the left and right directions. In addition, since the position of the spacer chip can be adjusted by loosening the bolt from the outside of the coil side plate, the adjustment operation is easy.

[Brief description of the drawings]     FIG.   FIG. 2 is an exploded perspective view of a spacer set of the heating coil body according to the embodiment of the present invention.     FIG. 2   FIG. 2 is an explanatory front view of the heating coil body according to the embodiment of the present invention.     FIG. 3   It is a front explanatory view of the coil side plate of the heating coil body of one embodiment of the present invention.     FIG. 4   It is a front explanatory view of the conventional heating coil body.     FIG. 5   It is front explanatory drawing of the coil side plate of the conventional heating coil body.     [Explanation of symbols]   10 Spacer chip   11 Contact part   12 Shaft   13,21 teeth   14, 22 bolt holes   18 volts   19 nuts   20 Spacer chip holder   23 protrusion   24 Holder stand   30 Coil side plate   C heating coil   J Journal

Claims (1)

[Claim 1] A pair of substantially flat coil side plates disposed so as to be parallel and opposed to each other, a semi-open type high-frequency heating coil supported from the coil side plates, In a high-frequency heating coil body provided with a spacer set attached to the coil side plate to keep a gap distance between the work heated by the heating coil and the heating coil constant, A spacer chip that is fixed to the coil side plate and is attached to the coil side plate such that the spacer chip can move forward and backward in the direction of the work; Part and a substantially rectangular parallelepiped shaft part formed integrally with the contact part and formed with a plurality of linear first teeth on one surface side And a first bolt hole penetrating the shaft portion and the first tooth. The spacer chip holder includes a plurality of parallel straight second teeth meshing with the first tooth.
A substantially U-shaped protrusion projecting from the holder base so as to surround the shaft when the first tooth is engaged with the second tooth; and a second tooth. And a second bolt hole having an oval shape penetrating through the holder base, and the coil side plate includes a notch into which the protrusion is engaged and inserted. A high-frequency heating coil body in which a first tooth of a spacer chip is engaged with a second tooth, and a bolt is inserted into the first and second bolt holes to fix the spacer chip to a holder base.