JPH0441154Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a plate glass disposal device in a forming apparatus that continuously sends plate glass heated in a heating furnace to near its softening point to a forming position to form it.

(Prior art) As an apparatus for continuously forming curved glass such as automobile window glass, a plurality of glass plates are placed into a heating furnace at predetermined intervals, and the glass plates are passed horizontally through the heating furnace. An apparatus is known in which the heated plate glass is heated to near its softening point and then continuously conveyed in a horizontal state to a mold position for shaping.

In such a molding device, a heating section,
The molding section and furthermore the cooling section (sometimes at the same location as the molding section) are arranged continuously on the line.

(Problems to be solved by the invention) In the conventional molding equipment described above, the sheet glass may break during molding and cooling, and in this case, if molding is continued, fragments of the sheet glass may be left in the molding section, etc. This can lead to subsequent cracking of the glass sheet. Therefore, if a glass plate breaks during molding or cooling, the line is stopped to prevent subsequent glass sheets from being carried into the molding section and cooling section, and glass fragments are removed.

However, if the subsequent conveyance of the glass plate is stopped, there is a disadvantage that the glass plate is heated and softened more than necessary and the glass plate winds around the conveyance roll in the heating furnace.

(Means for solving the problem) In order to solve the above problem, the present invention provides a bending roll that can be raised and lowered upstream of the forming position,
This bending roll is attached to an arm that swings in the vertical direction, and this arm supports a conveyance roll that transports the sheet glass from the heating furnace to the forming position.When the sheet glass is discarded, the bending roll is The conveyance roll of the disposal section was arranged to be flush with the conveyance roll of the furnace and located above the conveyance roll of the heating furnace.

(Function) When forming cracks or cooling cracks in the glass plate are detected, the bending roll moves up and discards the subsequent glass plate conveyed to the forming position out of the forming apparatus.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a front view of a molding apparatus to which a disposal device according to the present invention is applied, FIG. 2 is a view taken along the arrow A--A in FIG. 1, and FIG. 3 is a plan view of the main parts of the molding apparatus.

The forming device includes a heating furnace 1 on the upstream side and a waste section 2 on the downstream side of the heating furnace 1 based on the transport direction of the plate glass.
A molding section 3 is disposed downstream of the disposal section 2.

The heating furnace 1 is provided with a tunnel furnace 6 on a support 5 erected on a floor 4, and within the tunnel furnace 6 are provided transport rolls 8 for horizontally transporting the plate glass G to an outlet 7.

Further, a support 9 is erected in the disposal section 2, and a base end portion of an arm 10 extending in the direction of the outlet 7 of the heating furnace is attached to the support 9 so as to be swingable in the vertical direction. A pair of arms 10 are provided, and transport rolls 11 for transporting the plate glass G from the heating furnace 1 to the forming section 3 are supported at a predetermined interval between the upper surfaces of the pair of arms 10.
It is rotated at a. Further, a bending roll 12 is supported at the tip of the arm 10 near the outlet 7 of the heating furnace 1.
The arm 10 is in a horizontal state and is at a lower position than the transport rolls 11. Moreover, the upper part of the conveyance roll 11 is covered with the ceiling part 6a which forms a part of the tunnel furnace 6, and the sheet glass G is prevented from being cooled.

Here, the arm 10 is swung by a drive mechanism 13. The drive mechanism 13 is supported by the most downstream column among the columns 5 of the heating furnace 1. Specifically, the base end of the cylinder unit 14 is attached to the column 5, and the axis of the cylinder unit 14 is connected to the connecting arm 15. An eccentric cam 20 is connected to the support pillar 5 with one end of the connecting arm 15 pivotally connected to the support pillar 5 side, and the other end connected to an arm 18 that rotates the gear 17 in the gear box 16, and is attached to the support pillar 5 via a bracket 19. The gear portion 21 and the gear 17 are connected by an intermediate gear 22, and a roller 23 attached to the lower surface of the tip of the arm 10 is brought into contact with the cam surface of the eccentric cam 20. Incidentally, as shown in FIG. 2, a pair of eccentric cams 20 are provided on the left and right.
0 and 20 are connected by a shaft 20a.

Furthermore, an upper mold 24, a lower mold 25, and a press roll 26 are arranged in the molding section 3. The upper mold 24 and the lower mold 25 have a hollow box shape, and cooling air blowing holes are formed in each molding surface. That is, in this embodiment, the molding device and the cooling position are located at the same location. Further, the press roll 26 receives the plate glass G from the transport roll 11 of the disposal section 2, and moves up and down independently of the lower mold 25, and when it descends, it presses the recess 2 formed in the lower mold 25.
It is stored in 7.

The operation of the molding apparatus constructed as described above will be described below.

First, in a normal state where no molding cracks or cooling cracks occur, the arm 10 is in a horizontal state, and the transport roll 8 in the heating furnace 1 and the transport roll 11 in the waste section 2 are flush with each other. It is becoming. The plate glass G placed in the heating furnace 1 in this state is horizontally transferred within the heating furnace 1 by the conveyor rolls 8, during which time the plate glass G is heated to near its softening point. The plate glass G heated to near its softening point is transferred to the forming section 3 by the conveyance roll 11 of the disposal section 2.
After that, the press roll 26 descends and the plate glass G is transferred to the lower mold 25.
The glass plate G is then bent between the upper die 24 and the lower die 25. When the bending is completed, the upper die 24 is raised and the lower die 25 is lowered, and the glass plate G is again placed on the press roll 26. Place,
Cooling air is blown out from the cooling air blowing holes of the upper mold 2 and the lower mold 25 toward the surface of the glass plate, and the glass plate G after molding is rapidly cooled and strengthened.

If a ring mold is provided, the plate glass is transferred from the press roll 26 onto the ring mold, and the plate glass is further supported by the ring mold during cooling.

Here, if the plate glass G is damaged during forming, cooling or transportation, or if the plate glass G in the furnace has a defect, this is detected by mechanical means or human means, Cylinder unit 1
Activate 4.

Then, due to the operation of the cylinder unit 14, the gear 17 in the gear box 16 is connected via the connecting arm 15.
rotates, the rotation of the gear 17 is transmitted to the eccentric cam 20, and the cam surface moves upward due to the rotation of the eccentric cam 20. Since the roller 23 of the arm 10 is in contact with this cam surface, the arm 10 moves upward. The bending roll 12 swings to the conveyor roll 8 of the heating furnace 1.
The transport roll 11 of the disposal section 2 is located above the transport roll 8.

As a result, the subsequent plate glass G conveyed through the heating furnace 1 passes over the bending roll 12 and goes around below the conveying roll 11, as shown in FIG. 4, and falls downward while being bent by its own weight. The fallen plate glass G is discharged by a conveyor or the like and reused.

In addition, in the illustrated example, bending roll 1
2 was installed near the outlet 7 of the tunnel furnace 6, but the bending roll 1 was placed in the middle of the tunnel furnace 6.
2 may be provided, and the plate glass G may be discharged out of the furnace from a position upstream of the outlet 7 of the tunnel furnace 6.

(Effects of the invention) As explained above, according to the invention, in an apparatus that continuously forms sheet glass, even if molding cracks, cooling cracks, or defects in the sheet glass occur in the furnace, the subsequent molding of sheet glass can be prevented. Since glass fragments, etc. can be removed without stopping the conveyance of the glass plate, the glass plate does not stop in the heating furnace or on the conveyor rolls, so excessive heating of the glass plate and winding around the rolls can be prevented. Production efficiency will be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of a molding device to which the disposal device according to the present invention is applied, FIG. 2 is a view taken along the arrow A-A in FIG. The figure is a front view illustrating the operation of the disposal device. In the drawing, 1 is a heating furnace, 2 is a waste section, 3 is a molding section, 8 and 11 are conveyor rolls, 10 is an arm, and 12
14 is a bending roll, 14 is a cylinder unit, 16 is a gearbox, 20 is an eccentric cam, 24
25 is an upper mold, 25 is a lower mold, and G is a plate glass.

Claims (1)

[Scope of utility model registration request] In a plate glass forming apparatus in which plate glass heated in a heating furnace to near its softening point is transported horizontally to a forming position, a plate glass waste section is provided upstream of the forming apparatus, and the forming A bending roll that can be raised and lowered is provided for discarding the plate glass conveyed to the forming position, and this bending roll is attached to an arm that swings vertically. A conveyor roll to be transferred is supported, and when disposing of the plate glass, the bending roll is flush with the conveyor roll of the heating furnace, and the conveyor roll of the disposal section is located above the conveyor roll of the heating furnace. A plate glass disposal device characterized by: