JPH0357451Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a sheet feeding device for a two-stage heating furnace for simultaneously feeding sheets, which are objects to be heated, to the upper and lower conveyors of the two-stage heating furnace. It is related to.

(Prior art) In recent years, plastic sheets that can be press-formed have begun to be used instead of steel plates to reduce the weight of automobile parts, etc., and due to functional and appearance requirements, it is necessary to stack and press two sheets. In some cases, a two-stage heating furnace is installed at the front of the press machine to heat and soften the two sheets at the same time, and then simultaneously feed the sheets to the press machine. However, in the past, the work of simultaneously feeding two sheets onto the upper and lower conveyors at the front entrance of a two-stage heating furnace was done exclusively by hand, so when the sheets were large and heavy, Not only is it extremely difficult for the workers to work, it is inefficient.
It was difficult to accurately place the sheets in fixed positions on the upper and lower conveyors, and there were problems such as misalignment during lamination pressing.

(Problems that the invention attempts to solve) This invention solves the conventional problems as mentioned above,
It was completed with the aim of being a sheet feeding device for a two-stage heating furnace that can automatically feed two sheets simultaneously onto the upper and lower conveyors of the two-stage heating furnace without misalignment.

(Means for Solving the Problems) The present invention has a sheet supply unit that supplies sheets to be heated in the upper stage and a sheet supply unit to supply sheets to be heated in the lower stage, on both sides of the front of a two-stage heating furnace. The furnaces are installed at different positions in the longitudinal direction, and on the front machine frame of the two-stage heating furnace, there is a trolley that runs between the upper conveyor and the sheet supply section, and a trolley that runs between the lower conveyor and the sheet supply section. A traveling truck is provided so as to run in opposite directions by a pair of crank arms, and a sheet suction device is attached to the bottom surface of each truck for sucking sheets at each sheet supply section.

(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment. 1 is a two-stage heating furnace equipped with an upper heating chamber 2 and a lower heating chamber 3; 4 is an upper part passing through the upper heating chamber 2; A conveyor 5 is a lower conveyor that passes through the lower heating chamber 3, and the tip of the lower conveyor 5 is located at a position that projects further forward than the upper conveyor 4. On both sides of the front of the two-stage heating furnace 1, there are sheet supply sections 6 for supplying the sheet 50 heated in the upper stage to the two-stage heating furnace 1, and a sheet supply section 6 for supplying the sheet 51 heated in the lower stage. A sheet supply section 7 is provided at a position shifted in the longitudinal direction of the furnace. Further, each sheet supply section 6,
Rails 9 and 10 extending toward 7 are installed, a trolley 11 that runs between the upper conveyor 4 and the sheet supply section 6 is provided on the rail 9, and a trolley 11 that runs between the upper conveyor 5 and the sheet supply section 6 is provided on the rail 10. A trolley 12 that travels between the supply unit 7 and the supply unit 7 is provided. These carts 11 and 12 are connected via links 16 and 17 to the tips of a pair of crank arms 14 and 15 that project in opposite directions from a rotating shaft 13 provided at an upper center of the front machine frame 8. When the rotating shaft 13 is rotated clockwise by the motor 18 through the chain 19 within a range of about 180 degrees, the carts 11 and 12 simultaneously run in opposite directions, as shown by the solid line in FIG. When the carts 11 and 12 are moved onto the respective sheet supply sections 6 and 7 and rotated counterclockwise, the carts 11 and 12 simultaneously travel above the upper conveyor 4 and the lower conveyor 5, respectively, as shown by the imaginary lines. . An air cylinder 20 is installed on the underside of the trolley 11.
A sheet suction device 21 that can be moved up and down by the action of the sheet suction device 21 is attached, and its suction head 22 can suction two sheets 50 from the sheet supply section 6. This sheet suction tool 21 is equipped with vertical rack bars 23 at its four corners, and the cart 11 has a first gear 24 that meshes with the rack bars 23.
As shown in the figure, two sets of gears 24 on diagonal lines,
24 are attached to the same shaft 25 and rotate at the same speed, so that the sheet suction tool 21
will move up and down while always keeping its four corners horizontal. Also, on the bottom surface of the truck 12, there is also a seat suction tool 27 that can be moved up and down by the air cylinder 26.
is installed. As shown in FIG. 1, the sheet suction tool 27 is equipped with a pair of front and rear suction heads 28 and 29 on the left and right sides, and is capable of suctioning two left and right sheets 51 at the same time. Therefore, in order to ensure that only the topmost sheet 51 can be peeled off one by one, either the front or rear suction heads are fixed, but the other suction head is connected to the second suction head by the cylinder 30.
It is raised slightly as shown by the imaginary line in the figure. In FIG. 3, 31 is a sheet transport mechanism for taking out the sheet 50 heated and softened in the upper heating chamber 2 from above the upper conveyor 4, and 32 is a sheet transport mechanism for taking out the sheet 51 heated and softened in the lower heating chamber 3 onto the lower conveyor 5. A sheet take-out mechanism 33 is a press machine for laminating and pressing these two sheets.

(Function) The device configured in this way is a two-stage heating furnace 1.
Two sets of sheets 50 to be heated in the upper stage and sheets 51 to be heated in the lower stage are prepared in the sheet supply unit 6 and the sheet supply unit 7, which are provided on both sides of the front part of the furnace and shifted in position in the longitudinal direction of the furnace. Then, when the rotary shaft 13 is rotated clockwise by the motor 18, the carts 11 and 12 on the front machine frame 8 are moved in opposite directions by the pair of crank arms 14 and 15, as shown in FIG. It is located above the sheet supply sections 6 and 7 as shown by the solid line. Next, a sheet suction device 2 is attached to the bottom surface of each trolley 11, 12.
1, 27 to lower the suction heads 22, 28, 2.
9, two sheets 50 and 51 were each suctioned, and if necessary, one of the suction heads 29 was raised by the cylinder 30 as shown by the imaginary line in FIG. 2, and the second and subsequent sheets were peeled off. Then, the sheet suction tools 21 and 27 are raised. Thereafter, by reversing the motor 18 and rotating the rotary shaft 13 counterclockwise, the cart 11 moves from the sheet supply section 6 onto the upper conveyor 4 while holding the sheet 50, as shown by the imaginary line in FIG. At the same time, the trolley 12 adsorbs the sheet 51 and travels from the sheet supply section 7 onto the lower conveyor 5, where it transfers two sheets 50 and 51 each to the upper conveyor 4.
and simultaneously drop it to a fixed position on the lower conveyor 5. The upper conveyor 4 and the lower conveyor 5 to which the sheets 50 and 51 are supplied in this manner transport the sheets 50 and 51 to the upper heating chamber 2 and the lower heating chamber 3.
After being heated and softened, it is sent to the press machine 33. At this time, since the sheets 50 and 51 are supplied to fixed positions between the upper conveyor 4 and the lower conveyor 5, they can be accurately stacked and supplied to the press machine 33 without any positional deviation. Therefore, it is possible to perform a laminated press without positional deviation. In this embodiment, two sheets 50 and 51 are fed at the same time, but it goes without saying that one sheet each may be fed.

(Effects of the invention) As is clear from the above explanation, the present invention has two sheet supply sections which are provided at two locations shifted in the longitudinal direction of the furnace by two carts driven by a pair of crank arms. Since the sheets are simultaneously moved from the top and the bottom conveyor and automatically fed to the upper and lower conveyors, even heavy sheets can always be accurately placed in the correct position on the upper and lower conveyors. Therefore, even when laminating press is performed using a press machine, positional displacement does not occur. In addition, the present invention does not have the risk of reducing work efficiency as would be the case with workers, and has a simple structure that eliminates the risk of failure.
It has great practical value as it solves the problems of conventional work of this type.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a partially cutaway front view, and Fig. 3 is a partially cutaway view showing the entire two-stage heating furnace using the sheet feeding device of the present invention. It is a front view. 1...Two-stage heating furnace, 4...Upper conveyor, 5
... Lower conveyor, 6, 7 ... Sheet supply section, 8
...Front machine frame, 11, 12...Dolly, 14, 15
... Crank arm, 21, 27 ... Seat suction tool, 50, 51 ... Seat.

Claims (1)

[Scope of utility model registration request] A sheet supply unit 6 that supplies sheets 50 to be heated in the upper stage and a sheet supply unit 7 that supplies sheets 51 to be heated in the lower stage are shifted in position in the longitudinal direction of the furnace on both sides of the front part of the two-stage heating furnace 1. In addition, on the front machine frame 8 of the two-stage heating furnace 1, there is a trolley 1 that runs between the upper conveyor 4 and the sheet supply section 6.
1 and a cart 12 that runs between the lower conveyor 5 and the sheet supply section 7 are connected by a pair of crank arms 1.
4 and 15 so as to run in opposite directions, and a seat 50,
A sheet feeding device for a two-stage heating furnace, characterized in that sheet suction tools 21 and 27 are attached to suck sheets 51 in each sheet feeding section 6 and 7.