JPS6047507B2 - heating furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a heating furnace for heating elongated materials such as enameled wires and glass winding wires for purposes such as baking.

For example, a glass winding wire is formed by winding a glass thread around a core wire supplied from a core wire supplying device, applying an insulating varnish thereon, and baking the wire in a heating furnace.

In this glass winding production line, the line must be stopped when connecting core wires or replacing glass threads. If the product is left in the heating furnace when the line is stopped like this, the product will be overcooked, so it is preferable to open the heating furnace and retreat from the product. For this reason, heating furnaces used for this purpose generally have two separate furnace bodies, left and right, through which the long material to be heated passes, and these left and right furnace bodies are supported so that they can be pivoted around a pivot to open and close. It includes a furnace support means and a furnace opening/closing means for opening and closing the left and right furnace bodies. In the prior art, this furnace opening/closing means consists of a fixed pivot that supports the left and right furnace support plates via swinging arms, a movable pivot that directly supports the left and right furnace support plates, and usually an urging force that causes the swinging arm to break. It consists of a spring that closes the left and right furnace bodies, and a drive source that opens the left and right furnace bodies by pulling a movable pivot against the spring. However, the heating furnace of this prior art has disadvantages in that the structure of the furnace opening/closing means is particularly complicated, and a large driving force is required to open the left and right furnace bodies against the springs. An object of the present invention is to provide a heating furnace that has a simple structure and requires a small driving force.

Embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 4 show a heating furnace 10 according to the present invention, and this heating furnace 10 has a pair of side frames 12, 1"2' Furnace 1 with
4, and upper and lower semi-cylindrical student discount furnace bodies 16, 16' arranged above the furnace stand 14. Upper and lower furnace body 1
6, 16' are each particularly connected to the pivot 18 as shown in FIG.
It has support arms 16a, 16'a rotatably supported by the support arms 16a, 16'a, and the pivot shaft 18 is supported by the side frames 12, 12' via furnace position variable means, which will be described later. Therefore, the side frame 12,
Furnace support arm 12, 12', furnace support arm 16 at 12'
a, 16'a and the pivot 18 constitute a furnace support means 20. The furnace body consists of a heater 1 housed in a semi-cylindrical case 17A, 17''A via heat insulating materials 17B, 17''B.
7C and 17''C. As shown in FIGS. 3 and 4, the furnace opening/closing means 22 is rotatably supported by bearings 24, 24'' on the side frames 12, 12'' and meshes with each other. Consisting of a pair of gears 26, 26'' and an opening/closing arm 28, 2'' integrally attached to these gears, the opening/closing arm 28, 2''
``The tip of the ear 1 formed at the end of the furnace body 16, 16''
6b, 16''b with pins 30, 3''.

Preferably, the ears 16b, 16''b are in the form of bearings.
A drive source 32 that rotationally drives one gear, for example 26'', is attached to a pivot pin 3 on a furnace stand 14 as shown in FIGS. 1 to 3.
Pneumatic or hydraulic cylinder 3 mounted by 4
6, and a swinging arm 38 rotatably supported on the furnace stand 14.
A rotating shaft 40 is connected to the piston rod 36a of the cylinder 36 via a sprocket 44 coaxially connected to a sprocket 42 and a gear 26'' attached to both ends of the rotating shaft 40, and a and a chain sprocket transmission mechanism 48 consisting of a chain 46 and a chain 46.The furnace position variable means 50 includes guide rolls 52, 52'' provided at both ends of the pivot shaft 18, as shown in FIGS. 3 and 4. engages and rotates the shaft 18 into a pair of gears 26
, 26'', guide grooves 54, 54 provided in the side frames 12, 12'' for slidable guidance on lines that coincide with the engagement points of the side frames 12, 12''.
''.Next, referring to the usage state of the heating furnace 10, as shown in Fig. 3, normally the cylinder 3
6 piston rod 36a is retracted and the opening/closing arm 28
, 2'' maintain an angle of approximately 900 degrees so as to close the furnace bodies 16, 16''.

The long material 1 to be heated in this state is the furnace body 16, 16''
Formed between! It passes through a heating furnace 19 and is heated.
When the heating furnace 10 should be opened due to the stoppage of the long material 1, the piston rod 36a of the air cylinder 36 is extended, and the gears 26 and 26'' are clocked via the swing arm 38 and the chain/sprocket transmission mechanism 48. In this way, as shown in FIG. It pivots and opens, but at this time the pivot 18 is connected to the furnace body 16, 16.
As the piston 1 of the cylinder 36 swings, it is pushed rearward via the support arms 16a, 16''a, so it retreats along the guide grooves 54, 54'' (see Fig. 5).
6a continues to extend further and the opening/closing arms 28, 28'' further rotate, the furnace bodies 16, 16'' are further moved back and closed this time (see FIG. 6). In this way, the furnace bodies 16, 16'' are removed from the passage of the long material 1 and then closed again, so the heat inside the furnace is not dissipated.The driving source may be a geared motor or the like other than the cylinder type. According to the present invention, as described above, the furnace main body is opened and closed via a pair of mutually meshing gears and an opening/closing arm attached to these gears, so the structure is simple and The drive source is small and economical, and the furnace body closes automatically when it is retracted, so there is little heat loss.Furthermore, the furnace body can be retracted by using the rotational movement of the opening and closing arm. Since this is done by moving backwards, there is no need for a special drive source for the backward motion, so the equipment costs are not high.

[Brief explanation of the drawing]

1, 2, and 3 are a partially sectional front view, top view, and side view of a heating furnace according to the present invention, respectively, and FIG. 4 is a sectional view taken along the line A-N in FIG. 5 and 6 are side views for explaining the operation of the present invention. 1... Long material, 10... Heating furnace, 1
6,16″... Furnace body, 16a, 16″a...
...Support arm, 18...Pivot, 20...
Furnace support means, 22 Furnace opening/closing means, 26
,26''...Gear, 28,28''...Opening/closing arm, 30,3''...Pin, 32...Drive source, 50...Furnace position Variable means, 54,54″
...Guide groove.

Claims (1)

[Claims] 1. Two half-split furnace bodies, upper and lower, through which the elongated material to be heated passes, furnace support means for supporting the upper and lower furnace bodies so as to pivot about a pivot to open and close them, and the upper and lower furnace bodies to be opened and closed. In the heating furnace, the furnace opening/closing means includes a pair of mutually meshing gears, and upper and lower opening/closing arms attached to the gears and having tips connected to the upper and lower furnace bodies with pins. a drive source that rotationally drives at least one of the pair of gears, and a guide groove that slidably guides the pivot of the furnace support means on a line that coincides with the meshing point of the pair of gears. The heating furnace further comprises a furnace position variable means that moves the upper and lower furnace bodies between a forward position where the elongated material passes through and a retracted position where the elongated material is out of the path.