JP2000289841A - Work carrier device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an operation rate of a carrier device by dispensing with work such as to adjust guide width of a carrier conveyor each time even in the case when the width is different for a work by moving the center of gravity of the work to the side of a side surface guide arranged on a side part of the carrier conveyor. SOLUTION: This work carrier conveyor sequentially carries various kinds of works 14 different in dimensions by aligning them in a previously decided position by a carrier conveyor 20. In this case, it is constituted to move the center of gravity of the works 14 to the side of a side surface guide 30 arranged on a side part of the carrier conveyor 20 by inclining a carrier surface of the carrier conveyor 20 concerning its cross direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer device for transferring a coarse material (work) such as a forged product in a posture required for quality inspection.

[0002]

2. Description of the Related Art There are various types of work transfer devices (for example, see Japanese Patent Application Laid-Open No. 10-157820).
Among them, there is a type in which many types of works having different dimensions are transported by the same transport device. For example, there are dozens of connecting rods for engine parts with different thicknesses (widths) and overall lengths. In order to accurately detect these workpieces using a magnetic flaw detector, each workpiece must be placed in a predetermined posture. It is necessary to arrange and transport. If the workpieces pass through the magnetic flaw detector in a state where the workpieces partially overlap each other, they are checked as defective.

[0003]

Conventionally, the guide width of the conveyor is adjusted (changed) every time the size (particularly the width) of the work is different, so that the above-mentioned transfer condition is satisfied. I have. However, frequent step change operations lower the operation rate of the transfer device, and thus lower the productivity.

One object of the present invention is to solve the above-mentioned problem, and one object of the present invention is to shift the center of gravity of a work to a side guide arranged on the side of a conveyor, so that the width of the work varies depending on the work. Even in such a case, the operation of adjusting the guide width of the transport conveyor is not required each time, and the operation rate of the transport device is improved. Another object of the present invention is to suppress the occurrence of transport resistance caused by shifting the center of gravity of the work toward the side guide, and to eliminate slippage of the work during transportation. Still another object of the present invention is to prevent the stopped workpieces from overlapping each other when only moving the workpiece is temporarily stopped, and to maintain an accurate inspection in the quality inspection process. That is.

[0005]

Means for Solving the Problems The present invention has been made to achieve the above object, and the invention according to claim 1 is to sequentially transport various works having different dimensions in a predetermined posture by a transport conveyor. A work transfer device for performing, by inclining the transfer surface of the transfer conveyor with respect to its width direction, to move the center of gravity of the work to the side guide side arranged on the side of the transfer conveyor, I have.
By shifting the center of gravity of the work to the side guide in this manner, the guide width of the conveyor is always based on the side guide, and it is not necessary to change the guide width of the conveyor every time the width of the work is different. Therefore, the operation rate of the transfer device is improved, and thus the productivity is improved.

According to a second aspect of the present invention, there is provided the work transfer apparatus according to the first aspect, wherein a transfer means is provided on the side guide to contact the work and feed the work in the same direction as the transfer conveyor. Have been. This transport means
The transfer resistance caused by shifting the center of gravity of the work toward the side guide is suppressed, and the slip or the like of the work being transferred is eliminated, and stable transfer is maintained.

According to a third aspect of the present invention, there is provided the work transfer apparatus according to the second aspect, wherein a spiral shaft that is driven to rotate around an axis is used as the transfer means, and the rotation of the spiral shaft feeds the work to the workpiece. And a force in the direction of pressing against the transfer surface of the transfer conveyor. Thereby, for example, without stopping the conveyor to keep the interval of the work constant, even when the work is temporarily stopped by a stopper, the work does not rise from the transfer surface of the transfer conveyor,
The posture of the stopped work can be stabilized. As a result, it is possible to prevent a problem that adjacent works are overlapped with each other during the stop and are sent out as they are, and the quality inspection of the works by, for example, a magnetic flaw detector is accurately performed.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a schematic diagram showing an outline of the work transfer device. As is apparent from FIG. 1A showing the plane of this apparatus, the workpieces 14 to be put into the parts feeder 10 from the pallet 12 are sent out one by one to the transport conveyor 20 through the chute 11. Each work 14 passes through the chute 11 so as to be adjusted to a predetermined constant posture. Each work 14 sent to the conveyor 20 passes through the alignment means 24 capable of correcting the conveyance pitch so that the work 14 is sent one by one to the magnetic flaw detector 22 for quality inspection at regular intervals. Has become.

As is clear from FIG. 1B which partially shows the side surface of the apparatus, the aligning means 24 is used for the chute 11.
Each work 14 sent out from the conveyor conveyor 20
Is provided with a stopper 26 for applying a stop to the head of the head and stopping the feed. Alignment means 24
Is the second work 1 from the top as shown in FIG.
4 is pressed from the side to apply a stop, and a horizontal presser stopper 2 for stopping the feed of the work 14 thereafter.
8 is provided. And both of these stoppers 26, 2
The operation of 8 is controlled at the following timing.

That is, when the work 14 is fed into the conveyor 20, the feed of each work 14 is first stopped by the stopper 26. At this time, the horizontal press stopper 28 is retracted to its standby position. Next, the stop by the stopper 26 is released in a state where the lateral presser stopper 28 is operated to stop the feed of the second and subsequent works 14 from the top. As a result, one work 14 positioned at the head is sent to the magnetic flaw detector 22. By repeating this at a predetermined timing, the work 1
4 are sent one by one at regular intervals.

FIG. 2 is an explanatory view showing a specific example of the work 14. The workpiece 14 is an example of a connecting rod that is a forged rough material, and there are about 20 types of the workpiece 14 having a large dimensional difference between the large end portion 16 and the small end portion 18 and having different thicknesses (widths) and total lengths. In order to accurately detect the flaws and the like of these works 14 by the magnetic flaw detector 22, it is necessary to convey each work 14 on the conveyer 20 in the posture shown in FIG.

FIG. 2 shows a state in which the feeding of each work 14 is stopped by the alignment means 24, and the large end 16 and the small end 18 of the adjacent works 14 abut against each other. At this time, since the contact portion of the small end portion 18 with the transport surface of the transport conveyor 20 is easy to slide on an arcuate surface, the small end portion 18 is driven by the driving force of the transport conveyor 20 so that the subsequent work 14 is moved as shown in FIG. May get on the large end 16 of the vehicle. When the workpieces 14 are sent to the magnetic flaw detector 22 while partially overlapping each other, even if the workpieces 14 are appropriate, they are checked as defective.

Therefore, in the present embodiment, the transfer device shown in FIG.
And taking measures as shown in FIG.
FIG. 3 is a diagram showing the configuration of the transport device as viewed from the direction of travel of the conveyor. As shown in this drawing, the transport conveyor 20 is arranged at a predetermined angle (30 to 40 °) with respect to the width direction of the transport surface. Have been. Therefore, the conveyor 20
, The center of gravity of the workpiece 14 conveyed to the lower side. A side guide 30 is arranged on the lower side of the conveyor 20 over the entire length of the conveyor 20.

The side guide 30 is composed of a pair of upper and lower guide bars 32.
At the opening between the two, a spiral shaft 34 is also arranged over the entire length of the conveyor 20. Part of the outer peripheral surface of the spiral shaft 34 protrudes about 1 mm into the inside of the side guide 30 so that the outer peripheral surface and the work 14 come into contact with each other. The spiral shaft 34 is supported so as to be rotatable around its axis, and is rotated by a motor 36 by a belt 38. The positions of the two guide bars 32 can be adjusted in the vertical direction individually, so that the width of the guide bars 32 can be adjusted so that the work 14 does not bite into the opening where the spiral shaft 34 is located.

FIG. 4 shows that the spiral shaft 34 is transported by the conveyor 2
FIG. 2 is a schematic diagram showing the work together with the reference numeral 0 and the work 14. As is clear from this drawing, a ridge 35 having a predetermined pitch angle (about 30 °) is formed on the outer periphery of the spiral shaft 34, and the height (depth of the recess) of the ridge 35 is It is set to almost 2mm. When the spiral shaft 34 rotates about its axis, the work 14
, A thrust in an obliquely downward direction is given to the vehicle. That is, a feed force in the same direction as the transport conveyor 20 and a force in a direction of pressing the workpiece 14 against the transport surface of the transport conveyor 20 are applied to the work 14. A hard rubber-based material is used for the spiral shaft 34 to prevent the work 14 from being scratched.

According to the transfer device configured as described above, the transfer conveyor 20 is inclined as described above to shift the center of gravity of the work 14, so that the transfer conveyor 20 changes every time the width (thickness) of the work 14 changes. The operation of changing the width of the guide 20 is unnecessary. Since the above-mentioned thrust by the spiral shaft 34 is always applied to the workpiece 14 being transported, a situation such as generation of resistance to the drive of the transport conveyor 20 due to shifting of the center of gravity of the workpiece 14 can be suppressed. Thus, the posture of the workpiece 14 during the conveyance becomes stable. As described above, the spiral shaft 34 functions as a “transporting unit” that feeds the workpiece 14 in the same direction as the transport conveyor 20.

In a state where the feeding of each work 14 is temporarily stopped by the aligning means 24 shown in FIG. 1 as described above, each work 14 is pressed against the transfer surface of the transfer conveyor 20 by the thrust of the spiral shaft 34. Therefore, the small end portion 18 of the work 14 is prevented from floating from the transport surface. Therefore, this small end 18
Is the large end 1 of the subsequent workpiece 14 as shown in FIG.
The trouble of being sent to the magnetic flaw detector 22 while riding on the vehicle 6 is avoided. The axis of the spiral shaft 34 is set below the position of the small end 18 so that the thrust acts mainly on the small end 18. In addition, the rotation speed of the spiral shaft 34 is set so that a thrust larger than the transfer force of the transfer conveyor 20 can be obtained.
As a result, the floating of the small end portion 18 is more effectively prevented.

The transport conveyor 20 uses a slat conveyor having a flat surface (transport surface) in order to suppress the vibration of the workpiece 14 being transported. The speed of the conveyor 20 is set to about 0.25 m / sec. On the other hand, the horizontal holding stopper 28 in the alignment means 24
In order to cope with high-speed conveyance, the operation stroke is shortened to make the operation time about 0.2 seconds. From these facts, the supply capacity per work in the transfer device is about 4.0 seconds.

The operating rate of the transfer device in the present embodiment is increased by about 34% as compared with the conventional one. The reason is,
Each time the size of the work 14 is different, a step change operation for adjusting the guide width of the conveyor 20 is unnecessary, and the work 1
This is because the frequency of occurrence of troubles such as bite 4 is greatly reduced. In addition, since the work 14 does not easily slip during the transfer, the cycle time is reduced from the conventional 6 seconds to 4.7 seconds, and as a result, the productivity is improved by about 41%.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an outline of a work transfer device.

FIG. 2 is an explanatory diagram showing a specific example of a work.

FIG. 3 is a configuration diagram of the transport device as viewed from a conveyor traveling direction.

FIG. 4 is a schematic diagram showing a spiral shaft together with a conveyor and a work.

[Explanation of symbols]

 14 Work 20 Conveyor 30 Side guide 34 Spiral shaft

Claims (3)

[Claims] 1. A work transfer device for aligning various works having different dimensions by a transfer conveyor in a predetermined posture and sequentially transferring the works, wherein a transfer surface of the transfer conveyor is inclined with respect to a width direction thereof. A work transfer device configured to shift the center of gravity of the work to a side guide disposed on a side of the transfer conveyor. 2. The work transfer device according to claim 1, further comprising a transfer means provided on a side guide to contact the work and feed the work in the same direction as the transfer conveyor. 3. The work transfer device according to claim 2, wherein a spiral shaft rotatably driven around the axis is used as the transfer means, and the rotation of the spiral shaft transfers the force in the feed direction to the work and the transfer of the transfer conveyor. A work transfer device configured to apply a force in a direction of pressing against a surface.