JPH04367759A - Apparatus for painting fine rod-shaped body such as chopsticks - Google Patents

Abstract

PURPOSE:To enhance the working efficiency in the painting of a fine rod-shaped body by providing a supply means for thrusting the fine rod-shaped body on one side of a paint tank and providing a discharge means pulling out the fine rod-shaped body on the other side of the paint tank. CONSTITUTION:Flexible membrane 6 are provided to both ends of a paint tank 4 and a supply means 8 for thrusting a fine rod-shaped body A on one side of the paint tank 4 and a discharge means 9 pulling out the fine rod-shaped body A is provided on the other side of the paint tank 4 in opposed relation to the supply means 8. The paint tank 4 is intermittently revolved by 180 deg. horizontally and, at the stop time of the paint tank, the fine rod-shaped body is pulled out of the flexible membrane 6 provided to one end surface of the paint tank 4 by the discharge tank 4 in synchronous relation to the insertion of the fine rod-shaped body A in the other flexible membrane 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for painting the outer peripheral surface of a thin rod-shaped object such as chopsticks with paint such as lacquer.

0002

[Prior Art] The present applicant previously developed a device for painting paint such as lacquer on the outer circumferential surface of a thin stick-like body, such as bamboo or wooden chopsticks, which has a thin tip and becomes thicker toward the base. In JP 2-280870, a feeding means and a discharging means for a thin rod-like body are provided facing each other at the front and rear sides of a longitudinal paint tank, and the base of the thin rod-like body in a substantially horizontal state is held between the paint tank and the paint tank. A flexible membrane with an insertion hole into which each of the thin rod-like bodies held between the thin rods can be inserted from its tip is provided on the front surface (one side) of the paint tank, and the thin rod-like bodies are The support body is configured to press the body toward the insertion hole of the flexible membrane, and the support body is configured to be in contact with the tip of the thin rod-shaped body pushed into the paint tank. The thin rod-like body is provided so as to be movable back and forth along the longitudinal axis, and the paint tank is horizontally inverted with the thin rod-like body pushed into the paint tank to clamp the base of the thin rod-like body. In addition, after the reversal movement, the dispensing means is moved away from the paint tank, and in synchronization with the movement, the tip of the thin rod-shaped body in the paint tank is pulled out using the support body. We proposed a coating device configured to push back toward the flexible membrane.

0003

[Problem to be Solved by the Invention] In this prior art, since the flexible membrane is stretched only on one side of the paint tank, a thin rod-like body is inserted into the paint tank from the one side using the supply means. Then, while the paint tank is horizontally rotated by 180 degrees and the thin rod-like object is discharged by the discharge means, the thin rod-like object cannot be supplied into the paint tank.

[0004] That is, there is a problem in that the work efficiency is low because only one thin rod-like body can be painted during one rotation of the paint tank. It is an object of the present invention to solve the above-mentioned problems and provide a coating device with high efficiency in coating work.

[0005]

[Means for Solving the Problems] In order to achieve the object, in the present invention, thin rod-shaped bodies such as chopstick material are placed in a substantially horizontal state on both front and rear end surfaces of a longitudinal paint tank containing paint such as lacquer. A flexible membrane with an insertion hole that can be inserted from the tip of the paint tank is stretched, and a means for supplying a thin rod-like body is placed on one side and a means for carrying out a thin rod-like body on the other side, with both front and rear end surfaces of the paint tank facing each other. and configured to intermittently horizontally rotate the paint tank, and the supply means presses the thin rod-like body from its tip toward the insertion hole of the flexible membrane on the one side of the paint tank. In synchronization with this, the discharge means is controlled to pinch and pull out the root portion of the thin rod-like body from the flexible membrane on the other side of the paint tank.

[0006]

[Embodiment] Next, an embodiment embodying the present invention will be described. FIG. 1 is a plan view of a coating device 1, and FIG. 2 is a front view. A longitudinal paint tank 4 is attached to the provided vertical shaft 3, and the paint tank 4 is configured to be horizontally rotated via a drive motor 5 and a transmission mechanism 5a.

[0007] Reference numeral A denotes a thin rod-like body made of chopstick material such as bamboo or wood, and is formed so that the tip is thin and the diameter gradually increases toward the base. A flexible membrane set 7a including a flexible membrane 6 made of rubber or the like is removably disposed on both front and rear end surfaces of the paint tank 4, which is formed into an elongated box with an open top. Approximately at the center of the flexible membrane 6 is an insertion hole 6a (thin rod-like body A) into which the thin rod-like body A can be inserted from the tip.
A hole (extremely smaller than the cross-sectional area of the tip) is bored.

The paint tank 4 is placed on the table 2.
A supply means 8 for pushing and supplying the thin rod-like body A, which is disposed so that its longitudinal axis is substantially horizontal, toward the paint tank 4 is disposed on one side (on the right side in FIG. 1) across the paint tank. ,
At the other part of the paint tank 4 (on the left side in FIG. 1), discharging means 9 is provided for pulling out the thin rod-shaped body A after painting from the paint tank 4 and attaching it to the support 10.

Next, the supply means 8 will be explained in detail based on FIGS. 1, 2, and 3. The supply means 8 includes a means for feeding the thin rods A one by one from the hopper 11 to the supply table 15, a means for moving the thin rods A laterally on the supply table 15, and a means for moving the thin rods A horizontally on the supply table 15, and a means for moving the thin rods A to the paint tank 4. It can be roughly divided into means for pushing out toward the flexible membrane 6 on the end surface. That is, the insertion portion 11 of the hopper 11
A large number of thin rods A are placed in a substantially horizontal position from a, and the feed motor 13 and chain conveyor 12 lift the thin rods A one by one side by side and drop them into the reservoir 11b. Reference numeral 14 denotes a sensor such as a limit switch provided in the reservoir 11b, and when it senses that approximately 20 to 30 bottles have been stored in the reservoir 11b, the supply motor 13
to stop. Reference numeral 16 denotes a feeder for feeding the thin rod-like bodies A one by one toward the supply table 15 located below the outlet of the reservoir 11b, and includes a swing mechanism 16a for opening and closing the lower surface of the outlet of the reservoir 11b, and It consists of a pressing part 16b that repeatedly presses and releases the side surface of one thin rod-like body A on the side near the outlet in conjunction with the swinging mechanism 16a. Said feeder 1
Below the supply table 15, a forced movement mechanism 17 for laterally moving the thin rod-like object A that has fallen onto the top surface of the supply table 15 is configured to be moved forward and backward by an actuator 18 using air pressure or the like. A stopper 19 that moves upward and retracts against the
(operated by pneumatic actuator 20)
Once the stoppers 19 are brought into contact with each other and the stoppers 19 are depressed, the thin rod-like bodies A are moved to the concave grooves near the regulating wall 15a on one side of the supply stage 15.

[0010] The longitudinal direction of this concave groove is
5, the longitudinal axis of the thin rod-like body A can be set to coincide with the axis connecting the insertion hole 6a of the flexible membrane 6 and the pressing body 21. Reference numeral 21 denotes a pressing member that contacts the base of the thin rod-shaped body A and pushes it out in the 4-direction of the paint tank. Reference numeral 22 designates a pair of upper and lower guide shafts that slidably support the pressing member 21. 22 is a pair of stands 23,2
3, the pressing body 21 is moved up and down on the rear side of the base of the thin rod-like body A by an actuator 24 such as an air cylinder, and the pressing body 21 is moved close to the front of the paint tank 4 by an actuator 55. It is configured to move back and forth in the direction toward and away from the camera.

Between the supply table 15 and the front surface of the paint tank 4, there is provided a centering body 25 provided with a V-notch for supporting the tip of the thin rod-like body A in a substantially horizontal state, and a pneumatic actuator 26. The pressing body 2 is provided to move up and down.
1 approaches the front of the paint tank 4, the centering body 2
5 goes down. The reference numeral 26 in FIG. 1 is an adjusting means for aligning the base of the thin rod-like body A with respect to the pressing body 21, and the base of the thin rod-like body A placed on the supply stage 15 is adjusted slightly to the paint tank 4. Press in the direction.

FIG. 4 is a perspective view showing details of the flexible membrane set 7, in which a large diameter hole 29 is bored in the pair of front and back holding plates 27, 28, and the flexible membrane is placed approximately at the center of the hole 29. 6 insertion hole 6a
The flexible membrane 6 is held between the flexible membranes 6 and 6. At this time, the pair of clamping plates 27 and 28 are provided with an engaging protrusion 30 and an engaging hole 31 into which the engaging protrusion 30 is fitted, respectively, at centrally symmetrical positions with respect to the hole 29. The flexible membrane 6 is aligned with the pair of holding plates 27 and 28 through the drilled through hole 32.
It is configured so that it can be firmly clamped without shifting its position.

5 to 8 show the mounting structure of the flexible membrane set 7 on the paint tank 4, in which a U-shaped support with large diameter holes 34 is provided at both ends of a longitudinal base 33 to which the vertical shaft 3 is attached. frame 35,
35 is erected, and both support frames 35, 35 are reinforced with reinforcement bars 36, 36.
A gutter-shaped tray 37 having a substantially U-shaped cross section and open at both ends is tightly fitted between the support frames 35, 35 (in this case, a sealing material is inserted in the gap between the tray 37 and the open end). In any case, the structure is such that the liquid paint in the tray 37 does not leak from the gap between the inner surfaces of both the support frames 35 and 35. Reference numerals 38 and 38 denote a left pair of holders that sandwich the flexible membrane set 7 on the outer surface side of each support frame 35. Each holder 38 is formed into an L-shape in plan view, and the guide piece 39 of the holder 38 is is slidably fitted into a guide rail 40 formed in the side surface of each support frame, and by the force of a biasing spring 41 mounted between the guide piece 39 and a support piece 42 erected from the base 33. The flexible membrane set 7 is clamped so that it cannot fall off. Reference numeral 43 denotes a ball 44 type positioning mechanism attached to the holding body 38, in which a spring-biased ball 44 fits into an engagement recess 45 formed on the surface of the clamping plate 27 or 28, and the flexible membrane set 7
Regulates and positions the vertical position of the Reference numeral 46 denotes a cover body that prevents the guide piece 39 from falling off from the guide rail 40, and is detachably attached to the side surface of the support frame 38 with bolts 47.

Reference numeral 48 is means for replacing the flexible film set 7 provided above the ejecting means 9 side, and an actuator 50 such as a pneumatic actuator is provided at the rear of a cassette 49 in which a large number of flexible film sets 7 are stored. the flexible membrane set 7 in the direction of the front guide rail 51. A supply hole 52 is provided below the front guide rail 51 to allow the flexible membrane set 7 to move downward one set at a time, and a pusher body 53 moves up and down along the guide rail 51 via an actuator 54 such as air pressure.
Push the flexible membrane set 7 in the cassette 49 downward with
Flexible membrane set 7 at the end of the paint tank 4 below it
The new flexible membrane set 7 and the old flexible membrane set 7 are replaced by pressing the set 7 against the upper surface of the flexible membrane set 7 and forcibly pushing it downward. Note that reference numeral 48a is a column erected from the table 2 to support the replacement means 48, and reference numeral 48b is a guide cylinder that guides the flexible membrane set 7 falling downward.

Next, the ejecting means 9 will be explained according to FIGS. 1, 2, and 5. The ejecting means 9 is roughly divided into a drawing mechanism 56 for drawing out the thin rod-shaped body A from the paint tank 4 in a substantially horizontal state, and a drawing mechanism 56 for drawing the thin rod-shaped body A from the paint tank 4 in a substantially horizontal state. The base of the thin rod-like body A is taken over from the mechanism 56, and the support device 10 is held approximately vertically.
It consists of a posture changing mechanism 58 that leans against the body. The pull-out mechanism 56 rotates the paint tank 4 into which the thin rod-like body A is inserted by 180 degrees in a plan view, and then the support is provided with a pair of left and right clamping tools 59, 59 that hold the base of the thin rod-like body A from the left and right sides. 60, and a drive motor 62 that rotates forward and backward to drive an endless chain 61 to which the support 60 is attached.
is supported along the guide shaft 63 so as to be movable back and forth. The pair of clamping tools 59, 59 are configured such that their distal ends are reciprocated widely and narrowly by a pneumatic rotary actuator 64. Similarly, the left and right pair of gripping claws 65, 65 in the attitude changing mechanism 58 are configured such that their distal ends are reciprocated wide and narrow by a pneumatic rotary actuator (not shown) provided on an arm 67. case 66
The arm 67 is provided to move up and down approximately 90 degrees with respect to the support case 66, and is rotated by a pneumatic rotary actuator (not shown) inside the support case 66. The support case 67 has a pneumatic actuator 68 which is a reciprocating drive means disposed under the table 2.
Move back and forth at .

[0016] Reference numerals 69, 70, 71, and 72 indicate the timing of operation of the actuator 55, drive motor 62, etc. that move the supply means 8 and discharge means 9 back and forth, and the timing of horizontal rotation of the paint tank 4. It is a sensor such as a limit switch for automatic execution, and is configured to control the following operations by a central processing unit 73 such as a microcomputer provided on the table 2 or the like.

Next, the operation and other effects of the device with this configuration will be explained. First, as shown in FIGS. 1 and 2, the hopper 1
The thin rod-like bodies A dropped one by one from the supply table 15 are placed along the regulating wall 15a on the supply stand 15, and the thin rod-like bodies A are set so that the tip side is on the side closer to the paint tank 4. The centering body 25 is raised from one end side so that the longitudinal axis of the thin rod-like body A is directed toward the insertion hole 6a in the flexible membrane set 7 on one end face of the paint tank 4, and when the actuator 55 is turned on, the pressing body 21 in the direction of arrow B,
The thin rod-like body A is inserted into the flexible membrane 6 in front of the paint tank 4 from its tip.
When the pressing body 21 approaches the centering body 25, the centering body 25 is lowered, and the pressing body is further moved until the root part of the thin rod-like body A protrudes outside the flexible membrane 6. Advance 21. Thereafter, the pressing body 21 is stopped and then retreated in the C direction.

The paint tank 4 is rotated horizontally by 180 degrees around the vertical axis 3 with a slight delay from the start of the backward movement of the pressing body 21, and then stopped. Almost simultaneously with the horizontal rotation of the paint tank 4, the clamping tool 5 of the pulling mechanism 56 in the discharge means 9
9, 59 is brought close to the root of the protruding thin rod-like body A in the paint tank that has rotated half a rotation (movement in the E direction), and after pinching the root of the thin rod-like body A in the stopped paint tank 4, the paint Move back away from tank 4 (move in direction D). At this time, since the flexible film set 7 side of the other end face of the paint tank 4 faces the supplying means 8, the pressing body 21 of the supplying means 8 is pressed against the supply stand 1.
The thin rod-like bodies A on the membrane 5 are synchronously operated so as to be pushed forward toward the insertion holes 6a of the facing flexible membrane 6.

In this way, by repeatedly controlling the intermittent rotation of the paint tank by 180 degrees and simultaneously pushing in and pulling out the thin rod-shaped body A at both ends of the paint tank when the rotation is stopped, waste is reduced. It is possible to reduce the amount of time required as much as possible, making painting work faster and more efficient. Note that the thin rod-shaped body A whose tip is largely inserted into the paint tank 4 is immersed in the highly viscous paint in the paint tank 4, although its tip is not supported in the paint tank 4. Because it takes a long time for the tip of the thin rod-like body A to rotate so that it falls to the bottom of the paint tank 4, and because of the centrifugal force caused by the horizontal rotation of the paint tank 4, the thin rod-like body A is not in a horizontal state. Because of this, the axis of the thin rod-like body A is approximately horizontal when the root portion of the thin rod-like body A is held between the clamping tools 59, 59 of the extraction mechanism 56 in the ejection means 9.

[0020] Then, the thin rod-shaped body A is pulled out by the pull-out mechanism 56.
is completely pulled out from the paint tank 4, and the gripping claws 65, 65 of the attitude changing means 58 are used to change the grip of the base part.
When the posture changing means 58 is moved back by a slight distance and then rotated so that the tip of the thin rod-like body A faces upward, the root portion of the thin rod-like body A fits into the support hole in the support 10 and is erected. It can be done.

The flexible membrane 6 attached to both end faces of the paint tank 4 is attached between a detachable mounting plate on the surface of the support frame 35 instead of the flexible membrane set 7 as in the above embodiment. The structure may be such that the flexible membrane 6 is sandwiched therebetween.

[0022]

[Operations and Effects of the Invention] According to the structure of the present invention, flexible membranes with insertion holes are provided on both the front and rear end surfaces of the paint tank.
A supply means for pushing the thin rod-like body toward the flexible membrane of the paint tank, and a discharge means for pulling out the thin rod-like body after painting from the paint tank are provided facing each other on one side with the paint tank in between. Moreover, since the ejection means is controlled to pull out the thin rod-like body in synchronization with the operation of pushing the thin rod-like body by the supply means every time the paint tank horizontally rotates by 180 degrees, it is possible to perform half-rotation operation of the paint tank. By interlocking the reciprocating operation of the supply means and the discharge means, the coating work speed can be further improved.

[Brief explanation of drawings]

FIG. 1 is a plan view of a coating device.

FIG. 2 is a partially cutaway front view of the coating device.

FIG. 3 is a right side view of FIG. 1.

FIG. 4 is an exploded perspective view of the flexible membrane set.

FIG. 5 is a partially sectional front view of the discharge side.

FIG. 6 is an exploded perspective view of the paint tank.

FIG. 7 is an end cross-sectional view of the paint tank.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

[Explanation of symbols]

1 Painting equipment 2 Table A Thin rod-shaped body 3 Vertical axis 4 Paint tank 5 Drive motor 6 Flexible membrane 6a　　　Through hole 7 Flexible membrane set 8. Supply means 9. Discharge means １０　　　　　Support 11 Hopper 15 Supply stand 16 Feeder 17 Forced movement mechanism 21 Pressing body 25 Centering body 55 Actuator 56 Pulling out mechanism 58 Posture change means 59 Clamping tool 61 Endless chain 62 Drive motor

Claims (1)

[Claims] Claim 1: A flexible membrane with insertion holes into which a thin rod-like object such as a chopstick material can be inserted from its tip in a substantially horizontal position on both front and rear end surfaces of a longitudinal paint tank containing paint such as lacquer. A means for supplying a thin rod-like body is provided on one side and a means for carrying out a thin rod-like body on the other side facing each other across both front and rear end surfaces of the paint tank, and the paint tank is intermittently horizontally rotated. In synchronization with the supply means pressing the thin rod-like body from its tip toward the insertion hole of the flexible membrane on the one side of the paint tank, the discharge means removes the paint from the paint tank. 1. A coating device for a thin rod-like object such as chopsticks, characterized in that the thin rod-like object is controlled so as to pinch and pull out the root portion of the thin rod-like object from the flexible membrane on the other side.