JPH0334635Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a heating and conveying device for a plate-like object used for heating and softening a thermoplastic plate-like object.

(Prior art) In recent years, press-formable plastic plate-like products have become popular in place of steel plates for the purpose of reducing the weight of automobile parts, etc., and heating furnaces are used to preheat these plate-like products before pressing. A heating conveyance device for plate-like objects is used, which has a conveyor installed inside. However, this type of plate-like material becomes soft and sticky when heated and sticks to the conveyor, causing damage to the surface of the plate-like material and the contamination of the conveyor surface, resulting in frequent problems such as the need to reline the conveyor. There was a problem.

(Problems to be Solved by the Invention) The present invention solves these conventional problems, and minimizes damage to the surface of thermoplastic plate-shaped objects that are sticky when heated and contamination of the conveyor. This device was developed for the purpose of a heating and conveying device for plate-shaped materials that can be heated and softened while retaining the material.

(Means for Solving the Problems) The present invention consists of a trolley that moves intermittently forward and backward in a horizontal plane below the heating furnace, which is equipped with an outlet and an inlet at both ends; A lifting frame is provided, which is lowered after heating, and between a large number of pulleys protruding above both ends of the cart and a reversing pulley, a first wire is passed through the inside of the heating furnace in a zigzag pattern so that the tension can be adjusted. A second wire, which can be raised and lowered through the gap between the first wires, is similarly passed through the inside of the heating furnace between a large number of pulleys protruding above both ends of the lifting frame. It is characterized by being stretched in a zigzag pattern so that the tension can be adjusted.

(Example) Next, the present invention will be described in detail with reference to the illustrated embodiment. 1 is a heating furnace equipped with an infrared heater 2 inside, 3 is provided on a rail 4 below the heating furnace 1, and the illustration is omitted. 5 is an elevating frame provided further below the rail 4 below the heating furnace 1 so as to be able to move up and down synchronously with the trolley 3 by means of a plurality of cylinders 6. . The lifting frame 5 has a trolley 3 connected to the outlet 7 of the heating furnace 1.
After moving forward in the direction of
It repeats the movement of retreating in the direction of the entrance 8 and then descending. A large number of pulleys 9 and 10 are protruded above both ends of the truck 3, and between these pulleys 9 and 10, first wires 11 are passed through the inside of the heating furnace 1 and are arranged in a zigzag pattern at equal intervals. It is set up on. The end of the first wire 11 is locked by a locking tool 12 on the outer surface of the trolley 3, and the pulley 9,
It is stretched between the pulleys 10 and then reversed by the reversing pulley 13 on the opposite outer surface of the truck 3, and then stretched again between the pulleys 10 and 9, and the adjustment screw of the reversing pulley 13 14 allows the tension to be adjusted. Further, a large number of pulleys 15 and 16 are provided above both ends of the lifting frame 5, and a first pulley is provided between these pulleys 15 and 16.
A second wire 17 that can be raised and lowered through the gap between the wires 11 is connected to the pulley 16 in the same way as the first wire 11.
They are stretched in a zigzag pattern so that the tension can be adjusted using adjustment screws 18.

(Function) In this structure, a plate-shaped object 30 is placed on a first wire 11 stretched between a large number of pulleys 9 and 10 protruding above both ends of a cart 3. If the trolley 3 is moved forward with the lower elevating frame 5 of the heating furnace 1 being lowered, the plate-like object 30 can be supported by the first wire 11 of the trolley 3 and moved one pitch forward together with the trolley 3. can. Next, the elevating frame 5 is raised, and the second wire 17 is connected between the multiple pulleys 15 and 16 that are protruded upward from both ends of the elevating frame 5.
When the plate-like object 30 is raised through the gap between the first wires 11, the plate-like object 30 is supported by the second wire 17. During this time, when the cart 3 is retreated and the lifting frame 5 is lowered again, the plate-like object 30 is lifted up through the gap between the first wires 11. The object 30 is placed on the first wire 11 again, and by repeating the same cycle, the plate-like object 30 is placed on the first wire 11 again.
The heating furnace 1 is alternately supported by the first and second wires 11 and 17 that penetrate the inside of the heating furnace 1.
can be moved one pitch at a time.
During this time, the plate-like object 30 is sufficiently heated and softened and becomes sticky. However, the plate-like object 30 is stretched with a constant tension so that a large number of wires 11, 17 are stretched to prevent parallelism and unevenness. Since the wires 11 and 17 only come into contact with the plate-shaped object 30, their surfaces are hardly damaged, and since the wires 11 and 17 only come into line contact with the plate-like object 30, their contamination can be kept to a minimum.

(Effects of the invention) As is clear from the above explanation, the present invention prevents damage to the surface and stains on the conveyor by supporting a plate-shaped object for press forming with a wire stretched under a certain tension. It is possible to move the inside of the heating furnace while minimizing the movement of the plate-shaped object, and since the plate-shaped object is supported by the first wire that moves forward and backward and the second wire that moves up and down, the plate-like object It is also easy to adjust the lifting and lowering strokes and feeding strokes individually depending on the properties and the like. Furthermore, these wires are stretched between the outlet and inlet of the furnace body, so there is no need to form through holes in the hearth etc. to support these wires, and the plate-shaped objects are not inserted into the furnace. It also has the advantage of being uniformly heated and softened by receiving sufficient infrared rays from both the upper and lower surfaces, so its practical value is extremely great as it solves the problems of conventional devices of this type. .

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 2 is a partially cutaway plan view thereof. 1: Heating furnace, 3: Dolly, 5: Lifting frame,
7: Outlet, 8: Inlet, 9, 10: Pulley, 11:
1st wire, 15, 16: pulley, 17: 2nd
wire.

Claims (1)

[Scope of utility model registration request] A trolley 3 that repeatedly moves forward and backward intermittently in a horizontal plane below the heating furnace 1, which has an outlet 7 and an inlet 8 at both ends.
and an elevating frame 5 that rises after the cart 3 moves forward and descends after the cart retreats.
A large number of pulleys 9, 10 protrude above both ends of the
A first wire 11 is passed through the inside of the heating furnace 1 and stretched between the reversing pulleys 13 in a zigzag shape so that the tension can be adjusted. pulley 1
Between 5 and 16, a second wire 17 which can be raised and lowered through the gap between the first wires 11 is similarly passed through the inside of the heating furnace 1 and stretched in a zigzag shape so that the tension can be adjusted. Heating conveyance device for shaped objects.