JPH0565228B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of an apparatus for painting the outer peripheral surface of a thin rod-shaped object such as chopsticks with paint such as lacquer.

[Conventional technology]

Japanese Patent Publication No. Sho 62-58791 discloses a device for painting paint such as lacquer on the outer circumferential surface of a thin rod-shaped object made of bamboo or wood that is thin at the tip and becomes thicker toward the base. , the thin rod-like body is placed horizontally with its root portion held between them, while a flexible membrane made of rubber or the like with an insertion hole into which the thin rod-like body can be inserted from its tip is provided on the front side of the paint tank containing the paint. Stretch it,
The paint tank is advanced toward the tip of the thin rod-like body, the thin rod-like body is inserted into the paint tank through the insertion hole of the flexible membrane in the paint tank up to the vicinity of the base, and after being immersed in the paint, the paint tank is moved back. At this time, the outer periphery of the insertion hole in the flexible membrane surrounding the outer circumferential surface of the thin rod-like body adheres to the outer circumferential surface of the thin rod-like body when it is pulled out (when withdrawn) due to the force of the flexible membrane trying to contract due to the elastic force of the flexible membrane. The present disclosure discloses a configuration for painting by handling the paint.

[Problem to be solved by the invention]

According to this prior art, the thin rod-like body whose outer peripheral surface is dry before being painted is inserted from its tip into the insertion hole in the flexible membrane, so that the flexible membrane and the thin rod-like body meet at the insertion hole location. Despite the large friction with the outer circumferential surface of the paint, it is forced into the paint tank.

Therefore, if such a coating operation is repeated many times, the insertion hole in the flexible membrane gradually becomes larger due to the frictional force, and the handling effect of the flexible membrane on the outer circumferential surface of the thin rod-like object quickly decreases, causing the thin film to become thinner. It becomes impossible to achieve the desired coating.

Moreover, in one painting operation, the thin rod-shaped body passes through the insertion hole in the flexible membrane twice, back and forth and back and forth, so the expansion action of the insertion hole in the flexible membrane becomes faster, and this flexible membrane There is a problem in that the membrane must be replaced frequently, which significantly reduces the efficiency of painting operations and increases the cost for replacing the flexible membrane.

The present invention aims to solve this problem.

[Means to solve the problem]

To achieve this object, the invention as set forth in claim 1 provides a container whose bottom is partitioned by a flexible membrane with an insertion hole and which contains paint, and a thin rod-like body with a thin end facing downward, above the container. The device comprises an insertion means for pushing the thin rod-like body downward from the bottom of the container toward the insertion hole, and a pull-out means for grasping the base of the thin rod-like body below the bottom of the container and pulling it out downward. The invention described in 1. includes an insertion means for pushing a thin rod-like body with a thin end facing downward from above a container whose bottom is partitioned by a flexible membrane with an insertion hole toward the insertion hole; A paint supply means for spraying and supplying paint toward the outer periphery of the thin rod-like body, and a pulling means for gripping the base of the thin rod-like body below the bottom of the container and pulling it out downward.

[Operation and effect of the invention]

In the invention of the first claim, the bottom part is partitioned by a flexible membrane with an insertion hole, and the container containing the paint,
Since the thin rod-shaped body with its thin tip facing downward is pushed downward from above the container toward the insertion hole, at the time the thin rod-shaped body passes downward from the insertion hole in the flexible membrane, the inside of the container is The outer periphery of the thin rod-shaped body is wetted with paint.

Therefore, by interposing the liquid paint between the outer periphery of the thin rod-like body and the edge of the insertion hole, the paint can act as a lubricant when the thin rod-like body passes through the insertion hole, and the paint can act as a lubricant when the thin rod-like body passes through the insertion hole. The frictional force between the insertion hole edge of the flexural membrane and the outer peripheral surface of the thin rod-like body becomes extremely small.

Therefore, if a dry thin rod-shaped body is forced into the insertion hole of the flexible membrane as in the conventional technique, the insertion hole of the flexible membrane may be torn, or the insertion hole may become enlarged after a small number of painting operations. There are no inconveniences such as overshooting.

Furthermore, in the present invention, the thin rod-like body is pushed downward from above the container through the insertion hole of the flexible membrane at the bottom, and the tip is directed downward below the bottom of the container, so that the root part is directed downward. By grasping the root portion of the thin rod-like body that comes out of the thin rod-like body using a pulling means and pulling it out downward, the outer circumferential surface of the thin rod-like body can be coated substantially uniformly. In other words, since the painting operation can be carried out by passing the thin rod-like object through the insertion hole in the flexible membrane once, there is no need to pass the insertion hole in the flexible membrane twice back and forth as in the conventional technique.

Therefore, according to the present invention, the service life of the flexible membrane can be further extended.

In the invention of claim 2, in addition to the functions and effects achieved by the invention of claim 1, the paint is supplied into the container by spraying the paint onto the outer circumferential surface of the thin rod-like body, so that no excess There is no need to put the paint in a container in advance, and the paint can be sprayed at the same time as the thin rod-like body passes through the flexible membrane, so even if the flexible membrane has an insertion hole, there is no need to waste it. This has the remarkable effect that the paint does not run off and the paint can be used effectively.

〔Example〕

Next, to explain an embodiment, FIG. 1 is a plan view of the coating device 1, and FIG. 2 is a side view. Containers 3 are fixed at appropriate intervals along the circumferential direction.

As shown in FIG. 3, this container 3 has a cylindrical base 3a fixed onto a large through hole 4 drilled in the table 2, and the base 3a and the cylindrical side wall 3b are connected to a threaded portion or the like. The outer peripheral portion of the flexible membrane 5 made of soft rubber or the like is connected to the base 3a and the cylindrical side wall 3.
The container 3 is removably attached to the bottom of the container 3 so as to be sandwiched between the container 3 and the container 3. The flexible membrane 5 has an insertion hole 6 with a small diameter formed in the center thereof in plan view.

Reference numeral 7 denotes a thin rod-like object supplying means for feeding thin rod-like objects 8, which are shaped like chopsticks or the like such that the tip 8a is thin and becomes thicker toward the base 8b, to the upper position of the container 3 one by one. In the thin rod-like body supplying means 7, the thin rod-like bodies 8 arranged in a line with the tips facing downward are held on both left and right sides at appropriate intervals, and the thin rod-like bodies 8 at the most extreme position in the feeding direction are held at appropriate intervals. container 3
The flexible membrane 5 is moved back and forth so as to substantially coincide with the axis of the insertion hole 6 of the flexible membrane 5 and come to a position above it.

Reference numeral 9 denotes an insertion means disposed near the thin rod-shaped body supply means 7, and in the embodiment shown in FIG. In order to push the thin rod-like body 8 held between the two ends downward from above the container 3 toward the insertion hole 6 with the thin end 8a facing downward, the thin rod-shaped body 8 is wound around a pair of upper and lower chain sprockets 10, 10, etc. A pressing body 12, such as a chain or the like, protruding laterally from the endless band 11 pushes the upper end surface of the root portion 8b of the thin rod-shaped body 8 downward and is driven to move downward.

The thin rod-like body 8 is pushed in by the insertion means 9 until the root portion 8b of the thin rod-like body 8 approaches the container 3, and the thin rod-like body 8
After the pressing body 12 is separated from the upper end surface of the root portion 8b,
A push-out tool 13 disposed on the side of the endless band 11
moves forward to approach above the upper end surface of the root portion 8b of the thin rod-shaped body 8, and then descends to touch the root portion 8b.
is pushed into the vicinity of the upper surface of the flexible membrane 5.

Reference numeral 14 denotes a pulling means for gripping the root portion 8b of the thin rod-shaped body 8 from both left and right sides below the bottom of the container 3 and pulling it out downward, and it can be freely moved up and down, left and right, and swinging from the main body 16. It is a manipulator or the like that has a pair of left and right grasping fingers 15, 15 at the tips of protruding arms 17, 18 that operate with multiple degrees of freedom, and is equipped with a microcomputer, etc., and performs work operations in an order in which operation commands are taught or stored in advance. It may be a so-called robot.

Thin rod-shaped body 8 pulled out by this pulling means 14
A large number of thin rod-like bodies are inserted into the insertion holes 20 formed at appropriate intervals on the upper surface of the flat tray-shaped drying stacking table 19 with their bases 8b facing downward. 8 can be placed together.

The reference numeral 21 designates a pipe-shaped paint supply section for putting paint 22 such as lacquer into each of the containers 3.
The paint stored in a tank (not shown) is discharged through an injector or the like, and in the embodiment shown in FIG. Only the amount of paint required to paint a single thin rod-like body 8 can be injected by placing the paint in the area.

In this configuration, the tip of the thin rod supply means 7 is placed above the container 3 placed on one side of the table 2, and when an appropriate amount of paint 22 is poured into the container 3 from the paint supply section 21, approximately At the same time, the pushing body 12 of the insertion means 9 pushes the upper end surface of the root portion 8b to push the thin rod-like body 8 downward and move the tip 8 of the thin rod-like body 8 from the insertion hole 6 in the flexible membrane 5.
Push it in so that it passes through downwards.

Next, the root portion 8b of the thin rod-shaped body is
Push the thin rod-shaped body 8 further into the container 3. Most of the root portion 8b is the flexible membrane 8
When it comes out further downward, the pulling means 14 grips the root portion 8b and pulls it out downward.

In this case, the insertion hole 6 of the flexible membrane 5 in the container 3
When the thin rod-shaped body 8 passes through the location, the container 3 has already been
Since the paint 22 inside the thin rod-like body 8 is wetted sequentially from the tip 8a of the thin rod-like body 8, the outer peripheral edge of the insertion hole 6 and the thin rod-like body 8 are wetted with the paint 22 inside.
This means that the paint 22 is present in the gap between it and the outer peripheral surface of the paint 22, and the paint 22 can pass through the six insertion holes smoothly and with extremely low frictional resistance while playing the role of a so-called lubricant. At the same time, the paint is applied substantially uniformly to the outer peripheral surface of the thin rod-shaped body 8.

After pulling out the thin rod-like body 8 held by the pulling means 14 downward from the flexible membrane 5, the thin rod-like body 8 is inverted so that its tip 8a faces upward, and the drying accumulation table is When the base part 8b is inserted into the insertion hole 20 at 19 and set upright, and a large number of such painted thin rod-shaped bodies are finished,
Move the drying stacking table 19 to another location and dry it,
The above-mentioned painting and drying operations are repeated again to achieve multi-layer coating.

As a result of the experiment, when the thin rod-shaped body 8 passes through the six insertion holes of the flexible membrane 5 in the container 3 at a fast passing speed, the shrinkage force of the flexible membrane 5 itself causes the thin rod-like body 8 to pass outside the insertion hole 6. The handling action on the outer peripheral surface of the thin rod-like body at the periphery is relaxed, and the coating film thickness on the outer peripheral surface of the thin rod-like body becomes thicker.On the other hand, when the passing speed is slow, the handling action becomes stronger and the coating film thickness becomes extremely thick. It was found that it became thinner or disappeared.

Therefore, by increasing the pushing speed of the thin rod-shaped body 8 from the tip to the middle part by the insertion means 9, coating can be applied uniformly and to a predetermined thickness, and the descending speed of the pushing tool 13 that pushes the root part 8b can be increased. By making the process extremely slow, it is possible to prevent the outer circumferential surface of the root portion 8b from being coated at all.

As a result, the coating film thickness can be adjusted by simply changing and adjusting the speed at which the thin rod-like body 8 passes through the insertion hole 6 in the flexible membrane 5 as appropriate, and it is possible to adjust the coating film thickness by first slowing it down at the root portion 8b. With the two-stage motion, it will be cut out in later work, and
It is possible to avoid painting the root portion 8b of the thin rod-shaped body, which would otherwise be a hindrance during the gripping action by the pulling means 14 or the like.

The means for changing the passing speed of such a thin rod-shaped body is as follows:
This can be achieved by simply changing the descending speed of the pressing body 12 by changing the moving speed of the endless band 11.

Furthermore, an insertion means is configured to raise the container 3 together with the table 2 or only the container 3 with respect to the object whose posture is fixed by grasping the root portion 8b of the thin rod-like body 8, and the lifting speed of the container 3 is initially fast and the thin rod-shaped body 8 is fixed. base of body 8
It is also possible to set the speed to become slower as it approaches b.

Note that by arranging a plurality of containers 3 corresponding to the amount of work in a day on the rotatable table 2 in advance, if the insertion hole 6 of the flexible membrane 5 in each container 3 becomes too large, the table 2 By simply rotating the container 3 with a new flexible membrane 5, it is possible to move the container 3 with the new flexible membrane 5 to the work area, and the painting work can be quickly continued. Moreover, it becomes easy to replace the flexible membrane 5 of the container at another location on the table 2 while performing the painting work.

In the second embodiment shown in FIG. 4, a paint supply means, for example, a plurality of injection nozzles 23, 23, which spray paint toward the outer periphery of a thin rod-shaped body in a container, are arranged so as to face downward toward the center of the container 3. Then, the paint is sprayed in the form of a mist onto the outer circumferential surface of the thin rod-like body 8 that is descending by an injector or the like (not shown). According to this embodiment, in addition to achieving the effects of the first embodiment, , since it is sufficient to supply the minimum amount of paint to be applied to the outer peripheral surface of the thin rod-shaped body 8,
As in the first embodiment, the paint 22 is placed in the container 3 in advance.
It is possible to eliminate the inconvenience of the paint leaking out of the insertion hole 6 in the flexible membrane 5 and wasting it as soon as it is inserted, and the amount of paint to be used for painting work can be reduced to the minimum.

In addition, a plurality of injection nozzles 23 are arranged radially toward the outer peripheral surface of the thin rod-shaped body,
By changing the color of the paint sprayed from the plurality of spray nozzles 23, it is possible to carry out painting operations such as color separation and gradation in the circumferential direction of the thin rod-shaped body. Two or more sets of books are arranged at appropriate intervals along the axial direction of the thin rod-shaped body, and the color of the paint sprayed from the spray nozzle 23 in the lower set and the upper set is different, and the timing of the spray is staggered. Color-coded patterns can also be applied.

Furthermore, as shown in FIG. 4, if the cross-sectional shape of the flexible membrane 5 is formed in advance into a downward conical shape or a truncated conical shape, the paint 22 in the container 3 will be distributed at the center, that is, near the insertion hole 6. Since the paint 22 easily collects, it is possible to effectively perform painting with a small amount of paint 22.

In the present invention, by arranging a plurality of containers 3, thin rod-shaped body supply means 7, insertion means 8, and extraction means 14 in parallel, a plurality of thin rod-shaped bodies can be coated at the same time, and a large number of thin rod-shaped bodies can be coated. It is possible to produce.

In addition, in the present invention, one painting operation is completed by passing the thin rod-shaped body through the insertion hole of the flexible membrane in the container only once. By doing so, it is possible to speed up the painting work compared to the case where the painting work is completed in one go.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the coating device, FIG. 2 is a side view, FIG. 3 is an enlarged cross-sectional view of FIG. 1, and FIG. 4 is a cross-section of another embodiment. It is a diagram. DESCRIPTION OF SYMBOLS 1... Painting device, 2... Table, 3... Container, 4... Through hole, 5... Flexible membrane, 6... Insertion hole, 7... Thin rod-like body supply means, 8... Thin rod-like body ,
8a... Tip, 8b... Root portion, 9... Insertion means, 11... Endless band, 12... Pressing body, 13...
Extrusion tool, 14... Pulling means, 15, 15... Grasping finger, 16... Main body, 17, 18... Arm, 1
9...Drying stack, 20...Insertion hole, 21
... Paint supply unit, 22 ... Paint, 23 ... Spray nozzle.

Claims (1)

[Scope of Claims] 1. A container whose bottom is partitioned by a flexible membrane with an insertion hole and in which paint is placed, and a thin rod-like body with the thin end facing downward are pushed downward toward the insertion hole from above the container. 1. A coating device for a thin stick-like object such as chopsticks, comprising an insertion means and a pull-out means for gripping the base of the thin stick-like object below the bottom of the container and pulling it out downward. 2. Insertion means for pushing a thin rod-like body with a thin end facing downward from above a container whose bottom is partitioned by a flexible membrane with an insertion hole toward the insertion hole;
It is characterized by comprising a paint supply means for spraying paint toward the outer periphery of the thin rod-like body in the container, and a pulling means for gripping the base of the thin rod-like body below the bottom of the container and pulling it out downward. A coating device for thin rod-shaped objects such as chopsticks.