JPS5817720Y2 - Abnormal work indicating device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device that indicates abnormal workpieces such as unprocessed workpieces in a transfer machine that sequentially sends workpieces mounted on a pallet to a processing machine for processing. The operator can be instructed to

Conventionally, in a transfer machine, after inspecting the quality of a pilot hole for a screw, even in the case of an abnormality in which the pilot hole is not machined due to a breakage of the drill, etc., machining of other parts is continued.

Therefore, an abnormally normal workpiece arrives at the workpiece removal station, and there is a risk that the operator may confuse the abnormal workpiece with a normal workpiece.

This invention solves these problems with a simple structure.The gist of the invention is to equip the pallet for transporting workpieces with a removable stopper, and to guide this stopper when a signal indicating an abnormality is generated. The workpiece attached to the pallet is restrained from being removed by replacing it with a stopper member mounting hole drilled in the rail, and the worker is instructed that the workpiece restrained by the stopper is abnormal.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a general example of a transfer machine, where A is a workpiece loading/unloading station for loading and unloading workpieces on pallets I-P.

The workpiece attached to the pallet (P) at the workpiece loading/unloading station A is sent to the processing station by a chain conveyor driven by a pallet conveying motor B.

At the machining station, a pilot hole is drilled by a pilot hole processing machine C, and a pilot hole inspection device inspects whether the pilot hole is being machined and whether it is normal or abnormal.

Next, the normal workpiece is tapped in the prepared hole by the tapping bar E, and the abnormal work passes through the tapping bar E without being tapped.

Next, whether the work is normal or abnormal, its direction is changed at the turnover station F and sent to another processing station G for processing.

The processed workpiece travels on the inclined return conveyor H and returns to the workpiece demounting station A, where the workpiece is removed and installed.

In the present invention, when an abnormal signal is output from the pilot hole inspection device, the workpiece is marked, and even if the worker attempts to remove the workpiece from the pallet P at the workpiece unloading station A, the workpiece is restrained to the pallet P. This is intended to identify abnormal workpieces.

Its specific configuration will be explained with reference to FIGS. 2 to 4.

Reference numeral 1 denotes a pallet main body, which has rollers 2 and a hook 3 on the lower side that engages with a chain conveyor.

Reference numeral 4 denotes a workpiece holder, on which a workpiece positioning pin 5 is protruded.

Reference numeral 6 denotes a workpiece clamper, which engages the rotational output shaft of the nut runner with a nut runner engaging claw 8 to clamp or unclamp it.

7 is a rotation regulating pin of the workpiece clamper 6.

A guide rail 9 is provided on the pallet body 1 to slide and guide the workpiece W when it is attached or removed.

Furthermore, a holding mechanism for detachably holding the stopper member 11 is provided at the upper part of the pallet body 1.

Further, the guide rail 9 is provided with a mounting hole 10 through which the stopper member 11 can be mounted and removed.

As shown in FIG. 4, this stopper member mounting hole 10 is bored at a position corresponding to the end of the workpiece W attached to the pallet body 1 so that its tip opens into the workpiece guide surface inside the guide rail 9. A locking ball 13 is provided and pressed by a spring 12, and the shaft portion of the stopper member 11 is provided with a locking groove 14 into which the ball 13 is inserted.

Since the present invention has the structure as described above, the stopper member 1
1 is normally mounted and set at an appropriate location on the pallet body 1, as shown in FIGS. 2 and 3.

Therefore, the work W can be freely attached to and detached from the pallet body 1 via the guide rail 9.

If the workpiece W attached to the pallet main body 1 is not drilled at the machining station due to breakage of the drill or the like, an abnormality signal is transmitted by the pilot hole inspection device.

In response to this abnormality signal, the operator immediately pulls out the stopper member 11 set on the pallet body 1 and inserts it into the stopper member mounting hole 10 formed in the guide rail 9 in order to mark the abnormal workpiece.

As a result, as shown in FIG. 4, the tip of the stopper member 11 projects to the end of the workpiece W, and the workpiece W is prevented from being taken out by the stopper member 11.

Therefore, when the abnormal work is brought back to the removal station A together with the normal work after completing machining of other parts, the work will interfere with the stopper member 11 even if the work is attempted to be removed from the pallet body 1. Therefore, the operator must identify and confirm that the work is abnormal.

As described above, the present invention uses a work stopper mechanism with a simple structure to mark abnormal workpieces, and furthermore, even if the workpiece is removed from the pallet body at the workpiece mounting/removal station, the stopper member restricts the workpiece removal. Therefore, it has the advantage that identification and confirmation of abnormal workpieces can be reliably obtained.

In addition, in the present invention, the removal of the workpiece is prevented by replacing the stopper member held on the pallet with the stopper member mounting hole drilled in the guide rail, so that only when the workpiece is defective is the workpiece removed. The stopper member will be attached to the stopper member mounting hole of the guide rail, and the operator will be able to identify whether the workpiece is good or defective based on the mounting position of the stopper member, and will attempt to remove the defective workpiece that cannot be removed. It also has the advantage of reducing unnecessary work.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a general example of a transfer machine, Fig. 2 is a front view of a pallet body equipped with the device of the present invention, and Fig. 3 is a plan view showing a general example of a transfer machine.
The figure is a side view, and FIG. 4 is a large sectional view taken along the line IVIV in FIG. 2, showing the state in which the topper member is inserted. 1...Pallet body, 6...Work clamper 9...Guide rail, 10...
Stopper member mounting hole, 11...stopper member.

Claims (1)

[Scope of utility model registration request] In a transfer machine that sequentially sends a pallet with workpieces attached to a processing machine and processes the workpieces, a guide rail for guiding the workpieces is provided on the pallet, and
This guide rail is provided with a stopper member mounting hole whose tip end opens onto the work guide surface, and further provided with a removable stopper member whose tip portion protrudes from the work guide surface by being inserted into the stopper member mounting hole, A holding mechanism is provided on the pallet to hold the stopper in a position visible to the operator when the stopper member is not in use, and if there is an abnormality in the workpiece, the stopper member is removed from the holding mechanism and the stopper member is removed. A device for indicating an abnormal workpiece, which is installed in a mounting hole to prevent removal of the workpiece and to indicate an abnormal workpiece.