JPH0323330Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for marking products to inspect them and distinguish between good and defective products.

BACKGROUND OF THE INVENTION Traditionally, marking operations of this type have not been automated and have been carried out by workers using spray cans or brushes. FIG. 4 shows the inspection process for the steel pipe 1. In this inspection process, the weight of the steel pipe 1 received on the instruction block 2 is measured by the weighing device 3 and compared with the standard weight to check the weight.
Push the steel pipe 1 to the D side by
-Measure the length B according to C) and check the length by comparing it with the standard length. If the product satisfies both length and weight, it is determined to be a good product, but if either condition is not satisfied. It is determined that the product is defective.

Conventionally, upon confirming the error signal indicating that the product is defective, a worker attaches an identification mark 5 to a predetermined location on the surface of the steel pipe 1.

Problems to be Solved by the Invention As described above, marking can only be done manually in the past, and marking personnel are required. It is also possible to automate this by configuring the marking device so that the spray button on the paint spray can is pressed when an error signal is detected.
If the spray button is simply pressed upon detecting an error signal, if the spray stop interval is long, the spray nozzle may become clogged or the paint may separate in the spray can, resulting in poor spray stability over a long period of time. This behavior cannot be expected.

An object of the present invention is to provide a marking device that can eliminate the need for marking personnel and can be expected to operate stably over a long period of time without maintenance.

Means for Solving the Problems The marking device of the present invention includes a holder for holding a paint spray can, a posture switching means for rotating the holder between an upright posture of the paint spray can and an inverted posture, and a a first pressing means for pressing a spray button of a paint spray can, a second pressing means for pressing a spray button of a paint spray can in the inverted position, and a stirring operation for the posture switching means when a marking instruction signal is detected. When the stirring is finished, the paint spray can is stopped in an upright position, and the first pressing means is instructed to perform marking;
The present invention is characterized in that it is provided with a control device configured to turn the paint spray can into an inverted position after marking is completed and instruct the second pressing means to spray effectively.

Effect: This configuration allows the marking work to be done unmanned. In addition, since the paint spray can is stirred each time marking is performed, and the spray button is pressed after the stirring is complete, marking is done when the paint is separated, and the color of the mark remains constant. can be kept. Furthermore, since a dry spray is performed every time marking is completed, the spray port is highly reliable and does not become clogged even when the spray pause interval is long.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Components that have the same functions as those in FIG. 4 are given the same reference numerals and their explanations will be omitted.

Figure 1 shows the state in which marking is being executed;
The figure shows the state in which a dry run is being executed. Reference numeral 6 denotes a holder for holding a paint spray can 7, which is attached to the marking device main body 9 on the fixed side via a rotary actuator 8 so that the posture can be switched between the upright position shown in Fig. 1 and the inverted position shown in Fig. 2. installed. 1
0 and 11 are first and second air cylinders attached to the marking device main body 9, and the first air cylinder 10 has a cylinder shaft 13 extending toward and away from the upper part of the holder 6 in an upright position. Retire,
The second air cylinder 11 has a cylinder shaft 14 that moves toward and away from the upper part of the holder 6 in an inverted position. In addition, here, the cylinder shafts 13, 14
The distances l ₁ and l ₂ between the rotary actuator 8 and the rotary actuator 8 are equal. 15 is a lever provided on the upper part of the holder 6, the center of which is supported by a pin 17 passed between the side plates 16 of the holder 6;
One end is provided with a projection 19 that contacts the spray button 18 of the paint spray can 7, and the other end is provided with a projection 19 that contacts the spray button 18 of the paint spray can 7, and the other end is connected to the cylinder of the first air cylinder 10 through the hole 20 of the rear plate 19 of the holder 6. The cylinder shaft 13 of the second air cylinder 11 can be brought into contact with the other end through the hole 20 in the inverted position. 2
Reference numeral 1 denotes a spray cover, which receives sprayed paint in an inverted position. A limit switch 22 determines the rotation period and direction of the rotary actuator 8, and detects when the holder 6 has reached an upright or inverted position. 23 is an error signal 24 that notifies the occurrence of a defective product and a limit switch 22
The rotary actuator 8 and the first and second air cylinders 10 and 11
This is a control device that controls the The control device 23 also counts the error signal 24, detects that it has reached a set value, outputs an alarm signal indicating that it is time to replace the paint spray can 7, and lights up a buzzer or lamp. It is configured to count the duration of the marking standby, detect that the marking has been on standby for a predetermined period of time or more, and issue an instruction to perform a dry firing operation, which will be described later.

FIG. 3 shows the configuration of the main parts of the control device 23. Note that during the spray pause period, the holder 6 is in an inverted position as shown in FIG.

Upon detecting the error signal 24 [Fig. 3a], the control device 23 activates the rotary actuator 8 [3rd
In Fig. b], first, the user is instructed to repeatedly change from "upright" to "inverted" several times to agitate the paint inside the paint spray can 7, and then stop the paint spray can 7 in an upright position. Then, the control device 23 controls the first air cylinder 10
[Fig. 3c] commands the cylinder shaft 13 to be pushed out, and as shown in Fig. 1, the cylinder shaft 13 moves the lever 15.
Poke the other end and press the spray button 18 to spray paint 25 onto the defective product 1' to mark it.
When the spraying is finished, the control device 23 instructs the rotary actuator 8 to return the holder 6 to the inverted position, and when the holder 6 returns to the inverted position, the second
In order to wait after the air cylinder 11 [Fig. 3 d] is commanded to push out the cylinder shaft 14 and the paint spray can 7 is blown dry as shown in Fig. 2 so that no paint remains in the spray nozzle. This prevents the spray nozzle from becoming clogged with residual paint.

In addition, the control device 23 is configured to count the duration of marking standby, detect that marking has been on standby for more than a predetermined time, and issue an instruction to perform a dry blow operation. Even if there is a standby period, accidents such as dust adhering to the spray port from the outside and blocking the spray port can be prevented, and marking can be performed reliably under any usage conditions.

In the above embodiment, the control device 23 is configured to count the duration of marking standby, detect that marking has been on standby for more than a predetermined time, and issue an instruction to perform a dry blow operation. A similar effect can be obtained by instructing to dry-air at regular intervals regardless of whether or not marking is performed.

In the above embodiment, the first pressing means for pressing the spray button of the paint spray can in the upright position and the second pressing means for pressing the spray button of the paint spray can in the inverted position are attached to the fixed side and A first air cylinder 10 that moves toward and away from the holder 6 in an upright position, and a second air cylinder 11 that is attached to the fixed side and moves toward and away from the holder 6 in an inverted position.
and a lever 15 which is pivotally supported on the holder 6 and is rotationally driven in the spray button pressing direction by the first or second air cylinder 10, 11.
This can also be a single push drive.

Effects of the invention As explained above, the marking device of the invention has
By combining the posture switching means and the first and second pressing means, marking is performed after stirring every time marking is started, and a dry blow is always performed at the end, so conventional marking work can be automated. In addition, reliable operation can be expected over a long period of time without maintenance.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of the operating process of one embodiment of the marking device of the present invention, FIG. 3 is a configuration diagram of a control device that instructs the execution of the operations shown in FIGS. The figure is an explanatory diagram of conventional marking work. 1'...Defective product, 6...Holder, 7...Paint spray can, 8...Rotary actuator,
10, 11...first and second air cylinders, 1
5...Lever, 17...Pin, 18...Spray button.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A holder for holding a paint spray can, a posture switching means for rotating the holder between an upright position and an inverted position of the paint spray can, and a spray button for the paint spray can in the upright position. a first pressing means for pressing the spray button of the paint spray can in the inverted position; and a second pressing means for pressing the spray button of the paint spray can in the inverted position, and upon detecting a marking instruction signal, instructing the position switching means to perform a stirring operation when the stirring is completed. First, stop the paint spray can in an upright position.
A marking device is provided with a control device configured to instruct a second pressing means to perform marking, and after marking is completed, to turn the paint spray can into an inverted position and instruct a second pressing means to perform dry spraying. 2. The first and second pressing means are connected to a first cylinder that moves toward and away from a holder that is attached to a fixed side and is in an upright position, and a first cylinder that is attached to a fixed side that moves toward and away from a holder that is in an upright position. Registration of a utility model characterized by comprising a second cylinder that moves in and out in the direction of separation, and a lever that is pivotally supported by a holder and is rotationally driven in the direction of pressing the spray button by the first or second cylinder. A marking device according to claim 1.