JP4338137B2 - Method and apparatus for receiving and releasing input work - Google Patents

Description

  The present invention relates to a method and a device for receiving and releasing an input workpiece that receives and releases the workpiece input from above without damaging or deforming the workpiece.

  Conventionally, when a workpiece is transferred from a lift conveyor workpiece to a ducking conveyor, the phase of the claw of the lift conveyor and the dog of the ducking conveyor is set to the same phase by a detector and a control device (for example, see Patent Document 1).

However, the conveyor on which the workpiece is placed is conveyed in synchronism with the speed of the next conveyor, and a high-speed workpiece loaded from above cannot be handled.
Japanese Patent Application Laid-Open No. 5-294435

  An object of the present invention is to provide a receiving / releasing method and apparatus for receiving a workpiece, which is received and released without deforming or scratching the workpiece which has been preheated mainly for forging or the like, without being deformed or damaged. Is.

The present invention provides an inclined path toward the workpiece receiving section with respect to the workpiece input speed of the workpiece receiving section of the substantially vertical variable speed conveyor that sends the workpiece from the upper workpiece receiving section to the lower workpiece discharge section. Is detected by a workpiece speed detection mechanism provided on the workpiece , and based on the detected workpiece loading speed, the workpiece receiving of the substantially vertical variable speed conveyor is accelerated to the workpiece loading speed in synchronization with the workpiece receiving timing. The method of claim 1 is a method of receiving and releasing the input work in which the variable speed conveyor is decelerated in synchronization with the work discharge timing and the work receiving work is discharged from the work discharge portion . The workpiece receiver is provided on a substantially vertical variable speed conveyor that feeds the workpiece from the workpiece receiver to the lower workpiece discharge section. The work speed detecting mechanism for detecting the addition rate of the workpiece to be input, the provided on the inclined passageway toward the workpiece receiving unit receives the work based on the input rate of the work detected by said work speed detecting mechanism to the work receiving portion A variable speed conveyor is provided with a drive mechanism that accelerates the workpiece receiver to the workpiece loading speed in synchronization with the arrival timing to reach and decelerates in synchronization with the workpiece ejection timing at which the workpiece receiver reaches the workpiece ejection portion. In accordance with the present invention, the receiving / releasing device for the input work provided with the guide rail of the work in which the upper part of the inner rail is bent in accordance with the work and the lower part is bent in accordance with the work discharge part is defined as the invention of claim 2. An apparatus for receiving and releasing a loaded workpiece, wherein the workpiece speed detection mechanism comprises a first sensor and a second sensor. The invention, in the invention of claim 2 or 3, to a receiving and releasing device is turned workpiece attitude changing mechanism for converting the orientation of the workpiece to be discharged is provided on the workpiece discharge portion of the variable speed conveyor and the invention of claim 4 Is.

  The present invention detects the input speed of a workpiece input from above, and based on the detected workpiece input speed, synchronizes the workpiece reception of the substantially vertical variable speed conveyor with the workpiece reception timing. Since the workpiece is received with low impact, the workpiece can be received with low impact because the variable speed conveyor is decelerated and the workpiece receiving workpiece is discharged in synchronization with the workpiece discharge timing. Deformation and scratches can be prevented, and the occurrence of defective products can be suppressed.

  According to the Doppler method using a laser even if the work is a red hot body, the work speed detection mechanism is composed of the first sensor and the second sensor, and the speed is obtained by the transit time method. The accuracy can be made better than the measurement.

  According to the fourth aspect of the present invention, the posture changing mechanism for changing the posture of the workpiece to be discharged is provided in the workpiece discharge portion of the variable speed conveyor, so that the workpiece can be aligned and conveyed to the next process with the direction of the workpiece fixed. As a result, it is possible to perform processing that takes into account the effect of the workpiece received when the tip comes into contact with the workpiece receiver, thereby reducing the occurrence of defective products.

  As in claim 5, by providing a guide rail that prevents the workpiece from jumping out on the variable speed conveyor, the workpiece receiver of the variable speed conveyor can be a simple shape that only supports the end of the workpiece. Acceleration performance and deceleration performance can be improved because the workpiece holder becomes lighter and the weight of the movable part of the variable speed conveyor can be reduced. In addition, since the movable portion can be made lighter, sufficient acceleration performance can be obtained even with a motor having a small output, so that power consumption can be reduced and running cost can be suppressed.

Next, a preferred embodiment of the present invention will be described in detail with reference to FIGS.
In FIG. 1, reference numeral 1 denotes a main body frame. The main body frame 1 includes a substantially vertical variable speed conveyor 2, a guide rail 3 that guides a workpiece from falling off the variable speed conveyor 2, and a variable speed conveyor 2. An attitude conversion mechanism 4 that converts the attitude of the workpiece that is carried out and a chain conveyor 5 that sends out the workpiece whose attitude has been converted in the horizontal direction are provided.

  The variable speed conveyor 2 is provided with a workpiece receiving portion 10 for receiving a workpiece loaded from above through a chute S at an upper portion and a workpiece discharging portion 11 for discharging the workpiece at a lower portion, and the posture changing mechanism 4 Is provided subsequent to the workpiece discharge section 11. The drive mechanism 12 of the variable speed conveyor 2 includes a drive sprocket 13, a driven sprocket 14, a guide sprocket 15, a conveyor chain 16 wound around the guide sprocket, two workpiece receivers 17 attached to the conveyor chain 16, and a brake motor. Or it consists of drive sources 18, such as an electromagnetic clutch brake motor. The guide sprocket 15 is provided to follow the conveyor chain 16 with the guide rail 3 bent at the lower portion.

  Further, the variable speed conveyor 2 is provided with two workpiece receivers 17 at positions that bisect the conveyor chain 16 so that the workpiece receiver 17 that does not place a workpiece has a role of a counterweight so that the weight balance of the conveyor chain 16 is not lost. However, if the workpiece is light, only one workpiece receiver 17 may be provided on the conveyor chain 16, and if one is used, the weight of the movable part of the drive mechanism 12 can be reduced, so that the acceleration performance is improved. Can be made. Further, for the same reason, the work receiver 17 is reduced in weight as an arm that only receives the bottom of the work.

  The driving mechanism 12 synchronizes the workpiece receiver 17 with the workpiece loading timing to accelerate the workpiece loading speed, and moves the workpiece receptacle 17 to the workpiece receiving portion 10 in synchronization with the timing when the workpiece reaches the workpiece receiving portion 10. The work is decelerated in synchronization with the work release timing, and the work receiver 17 is moved to the work discharge section 11 in synchronization with the discharge timing at which the work reaches the work discharge section 11.

  In order to obtain time for accelerating the workpiece receiver 17 to the workpiece input speed, the length of the conveyor chain 16 between the workpiece receivers 17 is set to a length necessary for accelerating the workpiece receiver 17 to the workpiece input speed. For this reason, the length of the conveyor chain 16 between the workpiece receivers 17 can be shortened when the rotational speed of the drive source 18 is large, and the height of the variable speed conveyor can be reduced. Become.

  Further, as shown in FIG. 2, the guide rail 3 is composed of four rails 3a for guiding the peripheral surface of a cylindrical workpiece, and a workpiece receiver 17 is interposed between the rails 3a. . In this way, the workpiece placed on the unstable bracket-shaped workpiece receiver 17 is prevented from dropping off from the workpiece receiver 17.

  Further, the two rails 3a inside the guide rail 3 are bent at the upper and lower portions so as to have different guide angles so as to coincide with the inclination angle of the passage following the chute S, and the posture changing mechanism 4 is on standby. It is assumed to match the cage angle. Further, the two outer rails 3a are linear.

  Further, the posture changing mechanism 4 is provided following the work discharge unit 11, and includes a cage 20 in which three wires for storing and holding the work are erected from the bottom plate, and a reversing mechanism 21 for raising and lowering the cage 20. It will be.

  When the cage 20 is turned down as shown in FIG. 3, the two wires that receive the lower part of the work are arranged above the lower end of the work so that the work comes into contact with the upper surface of the chain conveyor 5. Yes. For this reason, when a workpiece | work contacts the upper surface of the chain conveyor 5, a workpiece | work is automatically pulled out from the cage 20 by the chain conveyor 5, and is transferred to the following process.

  The cage 20 standing upright of the posture changing mechanism 4 is disposed at a position intersecting with the arm of the workpiece receiver 17 so that the arm of the workpiece receiver 17 can pass through the gap between the wires of the cage 20.

  Reference numeral 22 denotes a guide plate provided at a bent portion where the upper and lower outer rails 3a of the guide rail 3 are not laid. The guide plate 22 is placed on the arm of the work receiver 17 with an arcuate inner surface and passes through the bent portion. The workpiece to be rotated can rotate its posture within the bent portion.

  Reference numeral 23 denotes a work speed detection mechanism provided in a passage from the chute S to the work receiving unit 10, and the work speed detection mechanism 23 includes a first sensor 23a and a second sensor 23b arranged at a constant interval. The workpiece loading speed is calculated from the time from when the first sensor 23a detects the workpiece until the second sensor 23b detects the workpiece, and the reception timing at which the workpiece reaches the workpiece receiving unit 10 is calculated. Is. Based on this calculation, the drive mechanism 12 of the variable speed conveyor 2 is driven.

  The workpiece speed detection mechanism 23 detects the speed by the transit time method using two sensors. However, the workpiece speed detection mechanism 23 may detect the speed by a Doppler method using an ultrasonic wave or a laser. is there.

  In the structure configured as described above, when a work heated to the forging temperature is introduced through the chute S, the work passing through the passage is detected by the work speed detection mechanism 23. This detection is performed by the first detection sensor 23a and the second detection sensor 23b of the workpiece speed detection mechanism 23, and the workpiece is loaded based on the passage times detected by the first and second detection sensors 23a and 23b. At the same time as the speed is calculated, the time for the work to reach the work receiving unit 10 of the variable speed conveyor 2 is calculated.

  Based on this calculation, the drive mechanism 12 of the variable speed conveyor 2 that is decelerated and driven at a low speed to discharge the workpiece is driven, and the workpiece receiver 17 is synchronized with the reception timing at which the workpiece receiver 17 reaches the workpiece receiver 10. Accelerate 17 to the input speed of the workpiece. When accelerating the variable speed conveyor 2, the work receiver 17 that receives the workpiece is at the lower end of the variable speed conveyor 2, and the variable speed conveyor 2 reaches the workpiece input speed while moving the distance that the workpiece receiver 17 reaches the workpiece receiver 10. Accelerated. That is, the length of the conveyor chain 16 between the workpiece receivers 17 is set to a length necessary for accelerating the workpiece receiver 17 to the workpiece input speed.

  The workpiece reaches the workpiece receiving unit 10 in synchronization with the reception timing at which the workpiece receiving unit 17 reaches the workpiece receiving unit 10, so that the workpiece is surely received by the workpiece receiving unit 10. In addition, when the workpiece is received, the workpiece receiver 17 moves at the workpiece input speed, so that the workpiece is received by the workpiece receiver 17 with almost no impact. For this reason, the workpiece will not be deformed or have a collision mark in spite of being heated and having reduced hardness.

  In this way, the variable speed conveyor 2 that has received the workpiece softly starts deceleration in synchronization with the workpiece discharge timing. This deceleration is performed by operating a brake of a brake motor or an electromagnetic clutch break motor as the drive source 18. By this deceleration, the workpiece receiver 17 moves toward the workpiece discharge unit 11 at a low speed. Then, the arm of the workpiece receiver 17 that has reached the workpiece discharge section 11 enters the cage 20 where the posture changing mechanism 4 is erected, and the arm of the workpiece receiver 17 performs an arc motion following the drive sprocket 13 from the cage 20. Pulled out. When the workpiece receiver 17 is pulled out from the cage 20, the workpiece is held by the wire rod of the cage 20 to be stopped and left in the cage 17 to complete the discharge.

  In this way, when the work is stored in the cage 20, the reversing mechanism 21 of the posture changing mechanism 4 is operated to cause the cage 20 to fall horizontally. When the cage 20 is laid down in a horizontal state, the work whose peripheral surface is exposed from between the two wire rods on the lower side of the cage 20 abuts on the chain conveyor 5 and is pulled out of the cage 20 by its contact resistance, and is next processed. It will be conveyed to.

It is a side view which shows preferable embodiment of this invention. Similarly, it is an AA arrow view It is a BB arrow line view similarly. Similarly, it is a CC arrow view.

Explanation of symbols

2 Variable speed conveyor 3 Guide rail 4 Posture change mechanism
10 Work receiving part
11 Work discharging part
12 Drive mechanism
17 Work receiving
23 Work speed detection mechanism

Claims (4)

A workpiece provided at an inclined passage toward the workpiece receiving portion at a workpiece feeding speed of the workpiece receiving portion of the substantially vertical variable speed conveyor that sends the workpiece from the upper workpiece receiving portion to the lower workpiece discharging portion. Detected by the speed detection mechanism, based on the detected workpiece loading speed, the workpiece receiving of the substantially vertical variable speed conveyor is synchronized with the workpiece receiving timing and accelerated to the workpiece loading speed to reduce the workpiece with low impact. A method for receiving and releasing a loaded workpiece, wherein the workpiece receiving workpiece is discharged from the workpiece discharging section by decelerating the variable speed conveyor in synchronization with the workpiece discharge timing. A workpiece speed detection mechanism for detecting a loading speed of a workpiece to be loaded into the workpiece receiving section, while providing a workpiece receiver on a substantially vertical variable speed conveyor that sends a workpiece from an upper workpiece receiving section to a lower workpiece discharge section , Provided in an inclined path toward the workpiece receiving section, and the workpiece receiving is accelerated to the workpiece loading speed in synchronization with the receiving timing when the workpiece receiving reaches the workpiece receiving section based on the workpiece loading speed detected by the workpiece speed detecting mechanism. In addition, the variable speed conveyor is provided with a drive mechanism that decelerates in synchronization with the workpiece discharge timing when the workpiece receiver reaches the workpiece discharge section, and the upper part of the inner rail is bent according to the workpiece receiving section and the lower section is set to the workpiece discharge section. receipt of input workpiece, characterized in that a workpiece guide rail is bent to fit the & Broadcasting apparatus.   3. The apparatus for receiving and releasing a loaded workpiece according to claim 2, wherein the workpiece speed detection mechanism includes a first sensor and a second sensor. 4. The apparatus for receiving and releasing a loaded workpiece according to claim 2, wherein a posture changing mechanism for changing the posture of the workpiece to be discharged is provided in a workpiece discharge portion of the variable speed conveyor.

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