US2061358A

US2061358A - Automatic discharging machine

Info

Publication number: US2061358A
Application number: US636742A
Authority: US
Inventors: John A Hunter; Howard K Ihrig
Original assignee: American Sheet and Tin Plate Co
Current assignee: American Sheet and Tin Plate Co
Priority date: 1932-10-07
Filing date: 1932-10-07
Publication date: 1936-11-17
Anticipated expiration: 1953-11-17

Description

Nov. 17, 1936. J. A. HUNTER ET Al.

AUTOMATIC DISCHARGING MACHINE 2 Sheets-Sheet 1 Filed OGt. 7, 1932 mw. N f l Mm H N\ .MY f

@@@Qwmwm NOV. 17, 1936. J, A HUNTER ET AL 2,061,358

AUTOMATIC DISCHARGING MACHINE Filed Oct. '7,` 1932 2 Sheets--Shee'cI 2 lzveidors. JOHN H. HUA/TEE @ad HOM/QED K. [HE/G.

Patented Nov. 17, 1936 UNITED sTATEs PATENT OFFICE AUTOMATIC DISCHABGING MACHINE of New Jersey Application October 7, 1932, Serial No. 636,742

2 Claims.

This invention relates to furnace discharging machines, one of the objects being the mechanical removal of objects from the furnace and prei'- erably their automatic transfer to an adjacent table or conveyer. Other objects may be inferred from the following disclosure of an illustrative machine embodying the invention.

Referring to the drawings:

Figure 1 is a side elevation.

Figure 2 is a top plan.

Figure 3 is a diagram of an electrical control.

This machine is arranged to remove sheet bars from the exit end of a continuous furnace I and transfer them to a gravity roller conveyer-2. 'I'his conveyer is assumed to supply pairs of sheet bars to a mill located at its end. A vertically sliding door 3 closes the exit of the furnace.

'Ihe machine includes a frame 4 in a pit 5 arranged between the furnace and conveyer. This frame mounts substantially parallel levers 6. There are four of these levers interconnected by cross-bars 'l to form two parallel pairs. They are linked together at their upper ends by members 8 having upstanding ends 9- to which carrier arms I are bolted. The arms form a carrier for the sheet bars.

In each instance the lower ends of the levers i are mounted by links II and I2 which are piv- Jted thereto at spaced points. 'I'he links I2 depend directly from the frame 4, and the links II 1re mounted. on plates I3 bolted to the frame.

'I'he links I I are of equal lengths. The links I2 are properly proportioned so that the carrier rms I0 follow a substantially elliptical path when reciprocated from the furnace to the conveyer. ['hat is to say, the carrier arms have a lifting and '.ransverse outgoing motion from the furnace vhich changes to a declining or curvilinear low- :ring motion upon approaching the conveyer. Nhen in the furnace the carrier arms lie in a :ubstantially horizontal plane, and when at the :onveyer they are slightly therebelow and sub- `tantially parallel therewith. The individual lollers forming this conveyer are short enough so hat the carrier arms may straddle them and thus ssume the secondly named position.

The above motions of the carrier arms are ac- :omplished by making the left-hand links I2 lightly longer than the right-hand links and the inks Il of equal lengths. The positions are acomplished by mounting the right-hand links I2 lightly above the left-hand links I2 as well as he right and left-hand links Il. This linking ystem may be varied so that the proportions of be lifting and lowering movements with respect to the transferring movement may be changed to meet the requirements oi the size of the furnace's exit and the relative positions of the furnace and conveyer.

A motor Il drives a crank I5 through a gear 5 reduction unit I6. This crank I5 is connected to the left-hand levers 6 at their point of connection with the links I2 by a connecting-rod I1. This reciprocates the carrier arms through their respective motions and to the various positions pre- 10 scribed by their mounting lever or linkage system. A spring I8 may be fixed-to the end of one of the links II for the purpose of partially counterbalancing the weight of the arms III and the carrier load.

The operation of the machine as so far described is so obvious as to need little comment. The lifting motion of the carrier arms I0 is rather slight when compared to their transferring motion. They approach the conveyer with a declining or curvilinear motion which not only deposits the sheet bars thereon but gives them a slight forward motion which starts them down the conveyer. This is important when it is considered it is possible for one of the conveyers rollers to become stuck and prevent proper carriage of bars merely laid thereon.

The motions of the carrier are throughout a gentle removal of the work from its position in the furnace which blends into a deposit on the conveyer with a slight forward urge.

In a continuous furnace of the type to which the machine is applied the Work is carried by conveyer blades I9 driven by a motor 20 and connected for operation immediately upon the opening of the door 3. This motor and its mechanical connections are not shown except as indicated on the wiring diagram.

Inasmuch as it is very desirable to furtherA this automatic operation, the invention also embodies an electrical control for the motor I4 designed for this purpose.

A control suitable for providing the roller of the mill served by the conveyer 2 with a means for effecting a completely automatic discharge and delivery of the sheet bars as needed is illustrated by the diagram. This diagram does not include the motor operating the door, but it is to be understood that it may be interconnected to open at the proper time in the usual manner.

In this control the motor I4 is connected to a power line 2| through an electromagnetic switch 22. vThe motor 20 is connected to the line through an electromagnetic switch 23. 'Ihe electromagnetic switch 22 is energized by a foot 55 treadle switch 24. This switch 22 includes a holding contact 22,'L which maintains the circuit closed upon releasal of the foot treadle switch. Energization of the motor Il is thus maintained until the carrier reaches its opposite reciprocation extreme when it is broken by a limit switch 25.

The sheet bars having now been deposited on the conveyor 2 will roll thereover and trip a switch 26. This reenergizes the electromagnetic switch 22 and causes the lever system to reciprocate to its other extreme when it operates a limit switch 21 which breaks its circuit and allows its holding contact 22a to open.

When the switch 21 opens another limit switch 28 is simultaneously closed. This energizes the electromagnetic switch 23 and starts the motor 20 which drives the conveyor blades I9. This switch also includes a holding contact 2lia which maintains its circuit when once energized. The motor 20 continues to operate until the conveyor blades move a sheet bar into contact with a trigger switch 29 in the furnace which breaks the circuit to the electromagnetic switch 23 and stops the motor. Afpair of sheet bars will now be over the carrier arms I0 ready for removal when the roller again operates the foot treadle switch 24. Although not shown, the trigger switch 29 may be provided with a solenoid which is energized simultaneously with the first energization of the motor I4, whereby it is drawn out of the way to permit removal of the sheet bars.

Preferably emergency stop push buttons 30 and 3l are arranged to break the circuits to the electromagnetic switches22 and 23. 'I'his will provide an immediate control in case of accidents. A starting push button 32 which energizes the electromagnetic switch 23 is also preferably provided so that the sheet bar moving motor 20 may be controlled in such .an emergency.

Although a specific form of this invention has been shown and described in accordance with the patent statutes, it is not intended to limit its scope exactly thereto, except as defined by the following claims.

We claim:

1. In combination with a'furnace and an adjacent conveyer, a machine including a carrier. means for mounting said carrier for reciprocation from a work receiving point in said furnace to a work depositing point at said conveyer, a motor for reciprocating said means, and manually operated means for starting said motor when said carrier is at said receiving point, means operable by the reciprocation-of said carrier to said depositing point for stopping said motor, means operable by the passage of work over said conveyer for starting said motor and means operable by the reciprocation of said carrier to said receiving point for stopping said motor.

2. In combination with a continuous furnace having a work moving motor and an adjacent conveyer, a machine including a carrier, means for mounting said carrier for reciprocation from a work receiving point in said furnace to a work depositing point at said conveyer, a motor for reciprocating said means, and manually operable means for starting said reciprocating motor when said carrier is at said receiving point, means operable by the reciprocation ci said carrier to said depositing point for stopping said reciprocating motor, means operable by the passage oi' work over said conveyer for starting said reciprocating motor, means operable by the reciprocation of said carrier to said receiving point for stopping said reciprocating motor and starting said furnaces Work moving motor, and means operable by the movement of work in said furnace for stopping said work moving motor.

JOHN A. HUNTER. HOWARD K. IHRIG.