JPH0248062A - Painting device for fine bar-shaped body such as chopsticks - Google Patents

Abstract

PURPOSE:To improve painting efficiency by freely liftably providing pressing bodies for pressing the front surfaces of the root parts of respective fine bar-shaped bodies to the front positions near respective crimping means and knife-shaped supports which bit the rear surfaces in the root parts of the respective tine bar shaped bodies in a pushing up state. CONSTITUTION:The parts near the tips of the fine bar-shaped bodies 9 are positioned by centering bodies 17 in such a manner that the tips of the fine bar-shaped bodies 9 can be inserted into insertion holes 55a, 56a of flexible films 55, 56 on the front surface of a paint tank. While the root parts of the fine bar-shaped bodies 9 are so pressed that the blade parts 16a of the pressing bodies 16 bite into said parts from above except the crimping means of supporting fittings 20, the knife-shaped supports 15 from below are bitten to the rear surfaces of the root parts to support said parts. Actuators 38 for fixing are actuated in this state to fix the knife-shaped supports 15. Since the postures of the fine bar-shaped bodies 9 supported by the centering bodies 17 are held in this way, the tips of the fine bar-shaped bodies 9 can maintain the postures in such a manner as to head toward the insertion holes 55a, 55a of the flexible films even if the centering bodies 17 are lowered. The simultaneous painting of the fine bar-shaped bodies 9 is thus possible.

Description

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

[Conventional technology]

Japanese Patent Publication No. Sho 62-58791 describes a device for painting lacquer or other paint on the outer circumferential surface of a thin stick-like object, such as bamboo or wooden chopsticks, which has a thin tip and becomes thicker toward the base. In front of the clamping tool that clamps the root portion from above and below, a paint tank is provided, which is movable back and forth, and is made up of a flexible membrane with insertion holes on the front surface into which each of the clamped thin rod-like bodies can be inserted from its tip. A knife-shaped support is provided in the vicinity of the front end of each of the clamping tools so as to be movable up and down, and the base of the thin rod-shaped body is pushed up and brought into contact with each of the knife-shaped supports, so that the knife-shaped support and A configuration is disclosed in which the root portion of the thin rod-like body is held by the holding tool in a self-centering manner so as to be swingable.

[Problem to be solved by the invention]

According to this prior art, since the clamping tool at the base of the thin rod-like body is self-centering and can swing freely, the tip of the thin rod-like body is held on a flexible membrane made of rubber or the like on the front surface of the paint tank. The tip of the thin rod-shaped body must be supported by the centering body until the paint tank is moved forward by inserting the paint tank.
After the paint tank has been advanced to the point where the tip of the thin rod-like body is inserted into the flexible membrane, it is necessary to temporarily stop the forward movement of the paint tank while the centering body is lowered, reducing painting work efficiency. That's what I was going to do.

In addition, after the paint in the paint tank has been applied to the vicinity of the base of the thin rod-like object, when the outer peripheral surface of the thin rod-like object is handled with the flexible membrane when the paint tank is retreated, the thin rod-like object may be held by the knife-like support. Since the strength was not sufficient, there was a problem in that the thin rod-like body of the flexible membrane was pulled out from the clamping tool.

The present invention solves the above two problems at once.

[Means for solving problems].

In order to achieve this purpose, in the present invention, the base portions of thin rod-like bodies such as chopstick material are inserted into and clamped by clamping tools arranged at appropriate intervals in the horizontal and lateral direction, and the tip of each thin rod-like body is held. At the front, there is a paint tank containing paint inside that can be moved back and forth.
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 of the paint tank, and a flexible membrane is provided below near the tip of the thin rod-like body to support the tip of each thin rod-like body. A centering body is vertically movable for setting the center position of the paint tank with respect to the flexible membrane, and a centering body for pressing the top surface of the base of each thin rod-shaped body is provided at a front position near each of the clamping tools. a pressing body;
A knife-shaped support member that presses up and bites into the lower surface of the root of each thin rod-like body is provided so as to be movable up and down, and a fixing means for maintaining the posture of the thin rod-like body supported by the centering body is provided in the knife-shaped support body. It is provided in relation to the support.

[Operation and effect of the invention]

According to this configuration, in order to insert the tip of the thin rod-like body into the flexible membrane on the front surface of the paint tank, the base of the thin rod-like body is positioned near the tip of the thin rod-like body with the centering body. In addition to the clamping tool, the part is pressed by a pressing body from above, while a knife-shaped support from below bites into the lower surface of the base and supports it, and in this state, the position of the knife-shaped support is fixed by a fixing means. As a result, the posture of the thin rod-like body supported by the centering body is maintained, so that even if the centering body is subsequently lowered, the tip of the thin rod-like body is directed toward the insertion hole in the flexible membrane. Can maintain posture.

Therefore, as described above, the paint tank can be advanced so as to coat the thin rod-shaped body held in its posture from the tip to the base all at once, and it is not necessary to stop the paint tank midway during the advance as in the prior art. coating efficiency can be greatly improved.

In addition, as mentioned above, the base of the thin rod is pushed up from below by the knife-like support and the root of the thin rod can be firmly held by the upper pressing body, so the paint tank When handling the thin rod-like body with the flexible membrane when the thin rod-like body is retreated, there will be no accident in which the root portion of the thin rod-like body is pulled out from the clamping tool and falls off.

〔Example〕

Next, to explain an embodiment, FIG. 1 is a plan view of the entire coating plant 1, in which a large number of vertically elongated panels 2 are installed so as to be able to be moved intermittently horizontally in an endless manner via a transfer means 3 such as a transfer check 7. A coating device 4 of the present invention is installed at one end of the coating plant 1.

FIG. 2 is a front view of the panel 2, in which an endless transport chain 5 is wound around a large number of chain brockets provided in front of the panel 2, and the transport chain 5 is driven by a drive motor 6.
The conveyor cheno 5 is configured so that it can be moved intermittently as appropriate, and clamping tools 7, which will be described in detail later, are attached to the front of the conveyance ceno 5 at appropriate intervals.

Reference numeral 8 denotes a supply device that inserts the base of a thin rod-shaped body 9, which is a chopstick material, into each clamping tool 7 above the coating device 4, and reference numeral 10 extracts the thin rod-shaped body 9 from the clamping tool 7 after painting and drying. Each discharge device is shown.

The paint tank 11 in the coating device 4 has its base end inclined at an angle (θ) with respect to the horizontal fixed table 12 of the machine frame.
The holding device is slidably supported by a pair of left and right round bar-shaped guide rails 13.13 which are arranged so as to face downward toward the front of the holding device, and is configured to be moved back and forth by a pneumatic cylinder 14.

Reference numeral 15 denotes a knife-shaped support that is movable up and down at a lower front position in the vicinity of the clamping tool 7 on the front side of the conveyance cheno 5 which moves laterally near the lower end of the panel 2, and reference numeral 16 denotes the knife-shaped support A pressing body 17 that rises and falls in an undulating manner above the support 15 is a centering body that is provided at a position closer to the paint tank 11 than the knife-shaped support 15 so as to be able to rise and fall freely.

The conveying chino 5 can be inserted into a pair of upper and lower support guide rails 19, 19 that protrude forward between the left and right chino sprockets 18, 18 at the lower front of the panel 2.

The clamping tool 7 attached to the front end of the conveyance ceno 5 is fixed to a supporting metal fitting 20 having a V-shaped cross section with an upwardly open path, and fixed to the upper surface of the proximal end of the supporting metal fitting 20, with the front end bent into a downward convex curved shape. It consists of a pressing spring 21 as a clamping part 21a (Figs. 6 to 8).
(see figure), the lower surface of the support fitting 20 is supported by a guide rail 23 so as to be able to freely slide approximately horizontally.

In the embodiment, the guide rail 23 is arranged so that the paint tank 11 can be coated with 20 thin rod-shaped bodies 9 at the same time.
On the top, 20 clamping tools 7 are arranged horizontally at a constant pinch (P) (25.4w intervals in the example).

The pressing body 16 has a downward L-shaped cross section with a blade portion 16a facing downward at the tip, and the blade portion 1'6a of each pressing body 16 holds the root portion of each thin rod-like body 9 held by the clamping tool 7. It can bite into the upper surface of the root part slightly forward of the front end of the tool 7, and the base end of each pressing body 16 is attached to the horizontally long rotation shaft 24 installed horizontally on the front surface of the panel 2 with the fixed pinch (P). By mounting and rotating an appropriate angle by a link mechanism (not shown), all the pressing bodies 16 can be moved up and down at the same time with respect to the base of the thin rod-shaped body 9.

Each knife-like support 15 is secured with a screw 26 so as to appropriately protrude upward from an upwardly facing piece of a base body 25 having a cross-shaped shape when viewed from the side, and each base body 25 faces upward through a through hole in the fixed table 12 .

Reference numeral 27 denotes a horizontally elongated elevating body that supports each of the base bodies 25 so as to be vertically movable at the constant pitch (P). Pressing actuator 28 for attached pneumatic cylinder, etc.
Each of the base bodies 25 is vertically slidably fitted into a main guide pin 30 that is driven up and down by the piston rod 28a via a connecting pin 36 and projected upward from the elevating body 27, and is loosely fitted into the main guide pin 30. A biasing spring 31 biases each base 25 upward.

A bush 34 that guides each of the main guide pins 30 vertically and slidably is embedded in the horizontally long upper support 32 fixed by a pair of left and right columns 33 in the frame 29. A guide i37 is recessed on the back surface and guides the front peripheral surface of the sub guide pin 35 that projects upward from each base body 25 in parallel with the main guide pin 30.

Reference numeral 38 denotes a fixing actuator such as a pneumatic cylinder that is disposed forward on the back side of the upper support 32, and the fixing actuator 38 has connecting brackets 39 and 40 attached to the frame 29 and/or the upper support 32. A plurality of guide pins 43 are attached to the plate material 41 via the guide pins 41 and extend over the tips of a plurality of guide pins 43 that slidably protrude from an oblong bracket 42 that is pin-connected via the piston rod 38a of each fixing actuator 38 that protrudes forward. The horizontally long stopper piece 44 to be attached is arranged so as to come into contact with the back surface of all the sub guide pins 35. Reference numeral 45 designates a coil spring that loosely fits into each guide pin 43 and urges the stopper piece 44 in the projecting direction.

Reference numerals 46 and 47 indicate that paint such as lacquer leaking from the front surface of the paint tank 11 may accumulate or scatter on the sliding parts of the main guide pin 30, actuators 28, 38, etc. via the knife-shaped support 15, base 25, etc. This is a protective cover that prevents solidification after washing.

The centering body 17 supports the tapered tip of the thin rod-shaped body 9 held by each of the holding tools 7 from the bottom surface, and as shown in FIG. A sawtooth notch groove 48 is formed on the upper end surface to support the thin rod-like body 9 at each tip end, and the centering body 17 can be raised and lowered via a support plate 49 and a pair of left and right support rods 50. stand 5
1, and is configured to move up and down by an appropriate height dimension on a positioning actuator 52 such as an air cylinder,
The pressing actuator 28, frame 29, etc. are attached to the upper surface of the lifting platform 51, and are integrally mounted to prevent the tips of the knife-shaped support 15 and centering body 17 from colliding with the panel 2 when the panel 2 moves laterally. It is driven up and down by an air cylinder 54 so as to sink significantly below the fixed table 12.

Further, the maximum raised position of the centering body 17 is
The insertion hole 55 of the flexible membrane 55, 56 stretched over the front surface of the paint tank 11, etc.
a, 56a is set (fixed) so that the center line of the paint tank 11 coincides with a trajectory G drawn as the paint tank 11 moves back and forth (in the embodiment, this trajectory G is fixed horizontally when viewed from the side). Inclination angle (
θ).

The order of raising the centering body 17, the knife-shaped support 15, etc. is as follows.

That is, the paint tank 11 is moved back greatly and held in position, and the thin rod-shaped body 9 before painting is transferred to the support guide rail 19, 19 with the base portion being held by the clamping tool 7 attached to the conveying chain 5. Being (ru)

Next, the centering body 17 rises, places the tip of each thin rod-like body 9 on the notch groove 48, and stops at a location where the axis of the thin rod-like body 9 coincides with the trajectory G.

Thereafter, the rotating shaft 24 to which the pressing body 16 is attached is rotated, and the blade portion 16a of the pressing body 16 is pressed so as to bite into the upper surface of the root portion of the thin rod-shaped body 9. When the pressing actuator 28 is actuated substantially simultaneously with the downward rotation of the pressing body or with a slight delay, a large number of main guide pins 30 are simultaneously raised via the elevating body 27, and each of the main guide pins 30 is The base bodies 25 to be fitted are raised via the biasing springs 31, and the upper edge portion of the knife-like support 15 at the upper end of each base body 25 bites into the lower surface of the root of the thin rod-like body 9.

At this time, even if the degree of elevation of the knife-shaped support 15 differs due to manufacturing errors of each thin rod-shaped body 9 or errors in attachment to the clamping tool 7, the error is absorbed by the biasing spring 31.

With the knife-shaped support 15 raised in this way, the fixing actuator 38 is actuated to move the piston rod 38a.
By protruding forward and pressing the back surface of the auxiliary guide pin 35 toward the upper support 32 via the bracket 42, the connecting pin 43, the coil spring 45, and the horizontally long stopper piece 44, all the base members 25 and, ultimately, the knife-shaped support are removed. body 15
is fixed in the raised position, and even if the centering body 17 is subsequently lowered, the thin rod-shaped body whose root portion is supported by the combination of the clamping tool 7, the pressing body 16, and the knife-shaped support body 15 remains. In the posture No. 9, the axis line can remain aligned with the trajectory G.

Note that the knife-like support 15 is not perpendicular to the lower surface of the slanted thin rod-like body 9, but is cut into the thin rod-like body 9 so as to press the root portion of the thin rod-like body 9 toward the proximal end of the clamping tool 7. The axis of the main guide pin 30 and the pressing actuator 28 are moved so that the knife-shaped support 15 rises obliquely upward from the front position of the lower surface of the rod-shaped body toward the front end of the clamping tool 7.
It is preferable to tilt the vertical axis of the paint tank 11, thereby reliably preventing the thin rod-like body 9 from being pulled out from the clamping tool 7 by being dragged by the flexible membrane 55 etc. by elastic force when the paint tank 11 is retreated. be able to.

As described above, when the paint tank 11 is moved forward as shown by the two-dot chain line in FIG. 6 while the thin rod-like body 9 is held in an attitude such that its tip side faces upward, the front surface of the paint tank 11 is The insertion holes 55 of the flexible membranes 55 and 56 stretched over the
Since the center line of a and 56a matches the trajectory G drawn as the paint tank 11 moves back and forth and the axis of each of the partner bodies 9, the tip of the thin rod body 9 is inserted into the insertion hole of the flexible membrane 55. 55a, and by dipping the outer periphery of the thin rod-shaped body 9 into the paint 57 such as lacquer in the paint tank 11, it can be painted all at once, and when the paint tank 11 is retracted, the flexible membrane 55 itself The elasticity of the thin rod-like body 9 has the effect of handling the outer periphery of the thin rod-shaped body 9, so that it is easy to wipe off excess paint adhering to the outer periphery and make the coating thickness uniform over the entire periphery.

When the painting process is completed as described above, the pressing bodies 114 to 6 are raised, the pressing actuator 28 and the fixing actuator 38 are activated, and the knife-shaped support 15 is lowered to release the holding of the posture of the thin rod-shaped body. After that, the conveyor cheno 5 is moved so that the next unpainted thin rod-shaped body 9 comes to the guide rail 19.19.

Note that the flexible membrane 5 is also provided on the partition wall 58 provided inside the paint tank 11.
6, the front plate 5 of this paint tank 11
It is sufficient to supply only a small amount of the paint 57 to the narrow space between the partition wall 58 and the partition wall 58.

In addition, in order to prevent the paint 57 from leaking out from the insertion hole 55a of the flexible membrane 55, the inside of the paint tank 11 is connected to a vacuum pump (not shown) with a hose 60, and the inside of the paint tank 11 is maintained at negative pressure. .

The position where the upper end blade part of the knife-shaped support 15 bites into the lower surface of the root of the thin rod-shaped body 9 is the blade part 16a of the upper pressing body 16.
As shown in Figure 7, the position where the
If the position of the knife-shaped support 15 that supports the root portion of the thin rod-like body 9 from below in a slightly pushed-up state is spaced forward from the front end of the clamping tool 5, the thin rod-like body 9 Supporting metal fittings 20 in the root end face clamping tool 7
Point contact is made with the top surface at two points on the left and right (A1 and A2), and the top surface of the base is in point contact at two points: point B1 of the clamping part 21a of the pressing spring 21 and point B2 by the blade part 16a of the pressing body 16. Furthermore, since point contact is made at the zero point of the upper end blade portion of the knife-shaped support 15, the knife-shaped support 15, the pressing body, and the clamping tool can be held in a so-called self-centering manner.

Therefore, possible! When handling with four membranes, the pressure contact force of the insertion hole of the flexible membrane against the outer periphery of the thin rod-like body is made uniform over the entire circumference, and it is possible to more reliably eliminate uneven thickness of the applied paint. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of a coating plant, FIG. 2 is a front view of a panel, FIG. 3 is a plan view showing the paint tank in an advanced state, and FIG. 4 is a plan view of the painting plant. IV-IV
Viewed side view Figure 5 is an enlarged plan view of the main part shown in the retracted state of the paint tank, Figure 6 is an enlarged side sectional view of the main part seen from the vr-■ of Figure 5, and Figure 7 is an enlarged plane view of the clamping tool. Figure 8 is the ■ of Figure 7.
-■ Sectional cross-sectional view Figure 9 is a front view of IX-IXX in Figure 6. Figure 10 is a partially cutaway sectional view taken along line X-X in Figure 6.
The figure is a partially cutaway plan view taken along line XI-XI in FIG. 6. ■...Painting plant, 2...Panel, 4...
・Painting device, 5... Conveyance cheno, 7... Holding tool, 2°... Supporting metal fitting, 21... Pressing spring, 9...
...Thin rod-shaped body, 11...Paint tank, 55.56
...Flexible membrane, 55a, 56a...Through hole, 12
... fixed table, 13.23 ... guide rail, 14 ... pneumatic cylinder, 15 ... knife-shaped support body, 25 ... base body, 16 ... press body, 1
7... Centering body, 19... Support guide rail,
24...Rotation axis, 27...Elevating body, 28...
・Press actuator, 29...frame body, 30...
・Main guide pin, 31...Biasing spring, 35...
Sub-guide pin, 37...Guide groove, 44...Stopper piece, 38...Fixing actuator, 45...
... Coil spring, 52 ... Positioning actuator, 54 ... Air cylinder.

Claims (1)

[Claims] (1) Insert the bases of thin rod-shaped bodies such as chopstick material into clamping tools arranged at appropriate intervals in the horizontal and lateral directions, and clamp them,
A paint tank containing paint inside is provided in front of the tip of each thin rod-like body so as to be movable back and forth, and the front surface of the paint tank is provided with an insertion hole into which each of the thin rod-like bodies held between the thin rods can be inserted from its tip. A flexible membrane is stretched, and below near the tip of the thin rod-shaped body, a centering body that supports each tip and sets the center position of the paint tank with respect to the flexible membrane is movable up and down. A pressing body for pressing the upper surface of the root of each thin rod-like body, and a knife-like support body that presses up and bites into the lower surface of the root of each thin rod-like body are provided at a front position near each of the clamping tools. A thin rod-like object such as chopsticks, characterized in that a fixing means is provided in association with the knife-like support to be movable up and down and to maintain the posture of the thin rod-like object supported by the centering body. Painting equipment.