JPH0611460A - Work inspection machine - Google Patents

Abstract

PURPOSE:To perform works effectively by mounting a magnet for work holding onto an endless transport table, sorting works automatically with a sensor, and gathering acceptable articles in a specified position. CONSTITUTION:In the position P1, a work 9 is attracted by a magnet M, and a transport table 2 is rotated by a drive device. When the transport table 2 stops in the position with a sensor 3, a cylinder 3a sinks, and a sensor element 3c at the tip senses whether the applicable place inspected on the work 9 is good or bad - if good, good article signal is given, which is stored temporarily. When the inspection is ended, the cylinder 3a rises, and the transport table 2 moves again. When the work inspected 9 comes to the position with a work exhaust device 4, good article signal is fed to the device 4 to actuate sinking of an exhaust cylinder 4a, and a knocker 4b at the tip of a cylinder rod acts on the work 9 to shake off to the outside of the transport table 2. Because actuation takes place only when the good article signal is fed, any bad work is rotated to the position P1 and collected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work inspection machine for automatically selecting a good or defective work by a detection sensor.

[0002]

Discrimination between a good product and a defective product such as mass-produced machine parts that have undergone processing such as welding and thread cutting has a direct economic effect such as mass-production efficiency for the development cost of the discrimination device. They often rely on manpower because they cannot obtain it. However, the manual selection work is often overlooked, and irreversible trouble may occur.

The present invention has been made in order to solve the above problems, and its main purpose is to automatically select a good product or a defective product from a work by a detection sensor, and collect the good products at a predetermined position to work the defective products. It is to provide a work inspection machine that reliably collects the work.

Another object of the present invention is to provide the above-mentioned inspection machine with further improved sorting work efficiency.

[0005]

In order to achieve the above first object, a feature of a work inspection machine of the present invention is that an inspection work is held on an endless carrier that rotates or rotates in a predetermined operation. The work transfer device with a magnet attached to it, the detection sensor that detects whether the work is supported by the magnet on the transfer table, and if it is a defective product. It is equipped with a work discharge device.

A feature of the present invention for attaining the second object is that, in the work inspection machine, the detection sensor and the work discharge device are arranged at different positions along the traveling direction of the carrier table to support the work. A plurality of magnets for the work are attached at the same pitch as the distance between the detection sensor and the work discharge device, and the work good detection signal of the sensor is the operation signal of the work discharge device when the work is conveyed to the position of the work discharge device. Is to be input as.

[0007]

When the worker attracts the work to the magnet of the endless transfer table and operates the work transfer device, the work is rotated by the detection sensor near the transfer table, and the detection sensor inspects the good product and the defective product. The work ejection device is activated by the non-defective product detection signal of the detection sensor, and only the non-defective products out of the works sent onto the carrier are removed from the carrier at the position of the ejector. Since the carrier is rotating or rotating endlessly, the defective work is automatically transferred to the front of the operator and collected while being attracted to the magnet of the carrier.

Since detection and discharge are generally carried out by mechanical operation of a cylinder or the like, if the detection sensor and the work discharge device are at the same position on the transfer table, it is necessary to lengthen the temporary stop time of the transfer table. Although the efficiency may decrease, in the invention of claim 2, since the detection sensor and the work discharge device are installed at different positions along the work advancing direction, detection and discharge are performed at the same time, and the detection work efficiency is increased. Get higher

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a work inspection machine according to the present invention. Reference numeral 1 is a work transfer device having an endless transfer table 2 for carrying a work, and 3 is arranged in the vicinity of the transfer table 2. A detection sensor 4 for identifying a non-defective product or a defective product such as a machined part sent by the rotation of the transfer table 2 and outputting a detection signal is similarly arranged near the transfer table 2 to transfer a non-defective product. It is a work discharge device to be removed from the table 2.

The work transfer device 1 shown in the figure illustrates an index table for rotating the transfer table 2 in a direction of an arrow by a predetermined operation by a driving means such as a motor incorporated in a casing 5. The index table is a base table 6. It is fixed to. A magnet M for attracting and holding a work to be inspected by magnetic force is attached to the upper surface of the carrier table 2.

The detection sensor 3 is a column 7 fixed to a base 6.
It is attached to the tip of the arm 8 extending from and is disposed above the track through which the magnet M of the carrier 2 passes. The detection sensor 3 shown in the figure is a sensor 3 which detects whether the work inspection point is good or bad on the substrate 3b which moves up and down by the sensor cylinder 3a.
When the work 9 supported by the magnet M of the carrier 2 is rotated to the position of the detection sensor 3 as shown in FIG. 2a, the sensor cylinder 3a descends in synchronization with this, The sensor 3c approaches the inspection position of the work 9 to detect whether the processed portion to be inspected is good or bad, and outputs the inspection result as a signal.

It should be noted that the inspection target of the work includes various inspections such as the presence or absence of a welded member of a processed part and the presence or absence of thread cutting.
It is determined as appropriate according to the inspection target and inspection location. For example, in the case of detecting the presence or absence of thread cutting to be formed on a component, it is possible to use a FOOT sensor and detect it by the reflection of the light projected onto the screw hole. Moreover, when detecting the presence or absence of a welding member, a proximity switch can be used as the sensor 3c.

The work discharging device 4 is attached to the tip of the arm 8 similarly to the detection sensor 3 and is arranged above the track through which the magnet M of the carrier 2 passes. The illustrated work discharge device 4 has a knocker 4b that moves up and down by a discharge cylinder 4a. When the non-defective detection signal of the detection sensor 3 is input, the discharge cylinder 4a is operated to convey the work 9 by lowering the knocker 4b. Magnet M of stand 2
It is forcibly detached from the carrier and is shaken off to the outside of the carrier 2. Although not shown, in order to prevent the work 9 from being damaged, the discharge cylinder 3a is supported by another cylinder that moves in the front-rear direction, and a pickup device is attached to the rod tip of the discharge cylinder 4a instead of the knocker 4b. Workpiece 9 that is attached and gripped by the pickup device
May be placed on a conveyor belt or the like (not shown) outside the conveyor table 2.

Although the work discharge device 4 may be provided at the same position as the detection sensor 3 and the good work may be removed from the carrier 2 at the detection position, as shown in the figure, the detection sensor 3 and the work discharge device 4 have a cylinder 3a. , 4a requires a long time to operate the cylinder. Therefore, in order to detect and eliminate the cylinder at the same position, the stop time of the carrier table 2 at the inspection position is lengthened or the rotation speed of the carrier table 2 is significantly reduced. Must be,
Work efficiency decreases. In order to solve this problem, preferably, as shown in the figure, the work discharge device 4 is arranged so as to be displaced from the detection sensor 3 in the direction of the rotation arrow so that the discharge of the preceding non-defective work and the detection of the success or failure of the succeeding work can be performed. Try to be done at different locations at the same time.

When the inspected work is moved in the rotational direction and ejected as in the illustrated embodiment, a plurality of magnets M are provided on the carrier 2 at the same pitch as the distance between the detection sensor 3 and the work ejection device 4. At the same time, the non-defective product detection signal of the detection sensor 3 is stored, and the non-defective product detection signal is input to the ejecting device 4 when the inspected non-defective product is rotated to the position of the ejecting device 4.

The transfer table of the work transfer device rotates in a predetermined operation. For example, when the inspection target is simple and the rotation speed of the carrier table 2 is relatively slow, while rotating the carrier table 2,
Although it can be detected and excluded, the workpiece 9 on the carrier 2 is detected by the inspection sensor when inspecting the deep part of the component or when the cylinders 3a and 4a are used for the detection sensor 3 and the discharging device 4 as shown in the figure. It is necessary to control the operation of the carrier table 2 so that it is temporarily stopped at the position 3 for the required time. These controls can be easily carried out by a brake mechanism, a stepping motor, etc., and the "predetermined operation" of the carrier referred to in this specification means the rotational operation in the various modes described above.

Next, the operation of the work inspection machine according to the embodiment shown in the figure will be described. The detection sensor 3 and the work discharge device 4 in the illustrated embodiment are arranged at an angle of 90 ° in the horizontal direction, and therefore, the magnets M are attached to the carrier table 2 at four positions at an angle of 90 ° from the center. ing. The operator causes the magnet M to adsorb the work 9 at the position P ₁ and rotates the carrier table 2 in the direction of the arrow by the drive device in the casing. When the carriage 2 rotates 90 degrees and stops at the position of the detection sensor 3, the cylinder 3a of the detection sensor 3 is lowered, and the sensor 3c at the tip detects whether the inspection point of the work 9 is good or bad, and the work 9 is inspected. When the location is a non-defective item, a non-defective item detection signal is output and temporarily stored. When the inspection is completed, the cylinder 3a of the detection sensor 3 moves upward, and then the carrier 2 is restarted.

When the carrier 2 further rotates 90 degrees and the work 9 inspected by the detection sensor 3 reaches the position of the work ejection device 4, the temporarily stored non-defective detection signal of the detection sensor 3 is transferred to the work ejection device 4. And the discharge cylinder 4a is lowered, and the knocker 4b at the tip of the cylinder rod acts on the work 9 to swing the work 9 outside the transport table 2.

By repeating this operation in sequence, the non-defective work 9 is removed from the carrier 2 at a predetermined position. Since the work discharge device 4 operates only when the non-defective product detection signal of the detection sensor 3 is input, the defective work is rotated to the position P _{1 while} being supported by the magnet M of the transport table 2, and is returned to the operator. Be recovered.

In the illustrated embodiment, as the work transfer device,
Although the index table using the rotary transport table has been illustrated, the present invention is not limited to this, and an endless belt or the like that rotates between the rolls at both ends may be attached with a magnet.

[0021]

[Effect] Good and defective products of the work are automatically identified by the detection sensor with high reliability, the good products are collected at a predetermined position, and the defective products are reliably collected by the operator. Therefore, the trouble due to the selection error can be prevented and the fatigue of the operator can be remarkably reduced.

By arranging the detection sensor and the discharging device at different positions, the inspection and discharging of two works can be performed at the same time, and the work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a work inspection machine according to the present invention,

FIG. 2a is a schematic explanatory view of a detection sensor unit,

FIG. 2b is a schematic explanatory view of a work discharge part,

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Work transfer device, 2 ... Transfer base, 3 ... Detection sensor, 3a ... Sensor cylinder, 3b ... Substrate, 3c ...
Sensor, 4 ... Work discharging device, 4a ... Discharging cylinder, 4b ... Notka, 5 ... Casing, 6 ... Base,
7 ... Post, 8 ... Arm, 9 ... Work, M ... Magnet.

Claims (2)

[Claims] 1. A work transfer device in which a magnet for holding a work for inspection is attached to an endless transfer table that rotates or rotates by a predetermined operation, and a good or defective product supported by the magnet of the transfer table. And a work discharger for removing a work to be inspected from a transfer table of a transfer device according to a non-defective product detection signal of the sensor. 2. The detection sensor and the work discharge device are arranged at different positions along the traveling direction of the carrier, and a plurality of magnets for supporting the work are attached at the same pitch as the distance between the detection sensor and the work discharge device. At the same time, the work non-defective detection signal of the sensor is inputted as an operation signal of the work discharging device when the work is conveyed to the position of the work discharging device.