JPH05185001A - Adhesive dip coating device for mechanical - Google Patents

Abstract

PURPOSE:To clean up an adhesive depositing on the tip of the holding claw of a chuck by pulling up a cylindrical mechanical part, rotating the part around its axis to eliminate the accumulation of the adhesive and to uniformize the coating thickness and wiping off the adhesive depositing on the lower surface of the part. CONSTITUTION:Plural cylindrical mechanical parts 10 are arranged horizontally in a line and conveyed by conveyors 11 and 15, an adhesive container 20 is provided between the ends of the conveyors, an upper moving frame 40 is furnished above the container 20, chucks 53 and 54 are fixed to the frame, and a wiper 70 is movably provided on the delivery side of the container 20 and a cleaning tank 72 on the supply side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an immersion type adhesive application device for machine parts, and is used for applying adhesive to the surface of a cylindrical machine part coated with rubber as a pretreatment. To be done.

[0002]

2. Description of the Related Art A cylindrical machine part coated with rubber is
An adhesive is applied to the surface of the rubber in order to improve its adhesion to the rubber. This adhesive consists of a first liquid and a second liquid. The first liquid is applied by immersion and dried, then the second liquid is applied by immersion and dried, and then coated with rubber and vulcanized. However, if the coating thickness of the above-mentioned first liquid and the second liquid is uneven or if the coating is partially insufficiently dried, the adhesive force with the rubber is reduced. In particular, when a cylindrical machine part has a flange, a boundary is formed at the boundary between the flange and the cylindrical part, and this boundary easily flows to cause uneven coating thickness.

As a device for removing the above-mentioned lump and making the coating thickness of the adhesive uniform, a chuck provided with a plurality of downwardly projecting gripping claws is provided so as to be vertically movable, and the chucking claws of the chuck vertically Grasp the upper end of the cylindrical machine part standing on the bottom of the machine, immerse it in the lower liquid tank, and then pull it up, and then contact the cylinder that constitutes the chuck with the driving belt that runs horizontally to vertically move the chuck. It is known that the excess adhesive attached to the mechanical parts is shaken off by centrifugal force by rotating around an axis (see Japanese Utility Model Laid-Open No. 1-139878).

[0004]

However, even if the excess adhesive is shaken off, a part of the adhesive on the machine part will be spread along the surface of the machine part before the machine part is delivered and placed on the conveyor. There is a problem in that a thick film or sag of the adhesive is formed on the lower end of the machine part when it flows down and adheres to the above-mentioned delivery conveyor and stains the conveyor.
Also, when the mechanical parts are dipped in the adhesive, the tip of the gripping claw of the chuck is also dipped in the adhesive at the same time, and the adhesive also adheres to the tip of the gripping claw, so the chuck sends out the mechanical part coated with the adhesive. However, there is a problem in that, when it is delivered to the conveyor and returned to the supply conveyor to sandwich the next machine part, the supply conveyor is also soiled with the adhesive.

According to the present invention, a plurality of cylindrical machine parts are erected vertically, immersed in an adhesive, pulled up, rotated around a vertical axis to shake off the adhesive, and thereafter, at the lower end of the machine part. It is intended to wipe off the generated dust to prevent the supply conveyor from being soiled, and to clean the tip of the gripping claw of the chuck to which the adhesive is attached.

[0006]

DISCLOSURE OF THE INVENTION An immersion type adhesive application device for machine parts according to the present invention is arranged such that a plurality of machine parts each having a cylindrical shape are vertically erected in a horizontal row and conveyed between the ends of a conveyor. An adhesive tank in which a plurality of mechanical parts can be immersed in the above-described one-row arrangement is provided, and an upper moving frame movable in both the front-rear direction and the vertical direction is provided above the adhesive tank. The moving frame is provided with a plurality of downwardly facing gripping claws that can be freely opened and closed, and a plurality of chucks rotatable about a vertical axis are attached at a pitch equal to the arrangement pitch of the mechanical parts. On the side, a wiping tool, which is held in a row in a row on the chuck and can come into contact with the lower surface of the machine component sent above the delivery conveyor, is provided above the delivery conveyor and in the standby position near the adhesive tank. And a cleaning tank which is provided so as to be able to reciprocate between the adhesive tank and the lower side of the horizontal row of chucks returned to the upper side of the supply conveyor on the supply side of the adhesive tank. It is characterized in that it is provided so that it can reciprocate between a standby position near the adhesive tank.

[0007]

When the upper moving frame is moved onto the supply conveyor located on the mechanical component supply side of the adhesive tank, and the upper moving frame is lowered to close the gripping claws of the plurality of chucks, the machine on the supply conveyor is moved. Parts are clamped by the chuck. Then, the upper moving frame is raised and further advanced to just above the adhesive tank, and then the upper moving frame is lowered, or the above mechanical parts are moved from the chuck up and down as described in Examples below. When it is transferred to the immersion component receiver and lowered, the plurality of mechanical components are immersed in the adhesive in the adhesive tank. Then, when the upper moving frame is raised or the dipping component receiver is raised to transfer the mechanical component to the chuck,
The above mechanical parts are lifted from the adhesive.

Then, when the chuck is rotated, the excessive adhesive on the mechanical parts is shaken off by this rotation,
The application thickness of the adhesive on the surface of the machine part is made uniform. Then, the upper moving frame is raised again, and is advanced to the upper side of the conveyer, and the wiping tool is discharged to move to the upper side of the conveyor, and then the upper movable frame is lowered to bring the lower surface of the mechanical part into contact with the wiper. , The adhesive on the bottom surface of the machine part is wiped off. The wipes are then replaced, the upper moving frame is lowered further, and the chuck is opened to deliver the mechanical parts for delivery to the conveyor.

After the above delivery, the upper moving frame is moved above the opposite end of the supply conveyor, and the washing tank is moved between the upper moving frame and the end of the supply conveyor.
After that, the upper moving frame is lowered and the gripping claws of the chuck are immersed in the cleaning tank to wash the gripping claws. Then, after the cleaning is completed, the upper moving frame is once raised, the washing tank is returned to the standby position, and then the upper moving frame is lowered onto the end of the supply conveyor to wash the mechanical parts on the supply conveyor. It is clamped by the gripping claw of.

[0010]

EXAMPLE In FIG. 2, the lower left supply conveyor 11 is shown.
Is an endless chain 12 and a bar 1 provided in a drying chamber of a cylindrical machine part 10 coated with a first liquid of an adhesive.
3 is a slat conveyor, and 14 is a chain sprocket provided on the outlet side of the chamber. The bar 13 is formed to be long in a direction (width direction) perpendicular to the paper surface, and four protrusions 13a are fixed in a row along the length direction at predetermined intervals. Then, the mechanical component 10 is mounted on the protrusion 13a with the flange 10a facing upward.

On the right side of the supply conveyor 11, there is provided a conveyor 15 for sandwiching and feeding the adhesive tank 20 containing the second liquid W of the adhesive. This delivery conveyor 15 has a second
Reference numeral 16 denotes a slat conveyor for guiding the liquid-applied mechanical component 10 to the drying chamber, and 16 denotes an endless chain, 1
Reference numeral 7 is a bar, and 18 is a chain sprocket on the inlet side of the drying chamber. And on the bar 17 above, 4
The individual protrusions 17a are provided in the same manner as in the supply conveyor 11.

[0012] The adhesive tank 20 is the conveyor 1
It is made long in the width direction at right angles to the conveying direction of 1 and 15 (see FIG. 1). Inside the adhesive tank 20, a short weir plate 21 is provided which is biased to one side in the width direction, and the weir plate 21 divides the adhesive tank 20 into two left and right chambers.
The left side of the barrier plate 21 is widely formed so that the four machine parts 10 can be arranged side by side in a row and immersed therein, and an elevating arm 23 that moves up and down outside the adhesive agent tank 20 through a vertical rod 24 to the inside thereof. The connected horizontal arm 25 is inserted, and the horizontal arm 25 is provided with four protrusions 26 that can be inserted into the lower end of the mechanical component 10 at the same pitch as the holes 13a of the bar 13 of the supply conveyor 11 and can be raised and lowered. It constitutes a submerged component receiver. Then, a drainage port 27 is provided on the bottom portion on the right side of the barrier plate 21, and when the second liquid W is supplied to the left side of the barrier plate 21, the second liquid W becomes the barrier plate 21.
To maintain the liquid level on the right side constant.

A pair of upper and lower horizontal guide rails 31, 31 are provided on the frame 30 on the side of the adhesive tank 20 (see FIG. 1).
Is fixed in the front-rear direction (conveying direction of the conveyors 11 and 15), and the front-rear slide base 33 is attached to the horizontal guide rail 31 via the slide block 32. This front and rear slide 3
3 moves forward and backward by driving a fluid cylinder (not shown), and stops at each side of the outlet side chain sprocket 14, the adhesive tank 20 of the supply conveyor 11 and the inlet side chain sprocket 18 of the delivery conveyor 15. Formed possible.

A pair of front and rear elevating guide rails 3 are provided on the vertical surface of the front and rear sliding base 33 on the side of the adhesive tank 20 with a support frame 34 interposed therebetween.
5 and 35 are fixed in the vertical direction, and a vertical support plate 42 is attached to the elevating guide rail 35 via a sliding block 41. An upper horizontal plate 43 and a lower horizontal plate 44 extending above the adhesive tank 20 are projected from the upper end of the vertical support plate 42 and slightly below the vertical support plate 42, and these vertical support plate 42, upper horizontal plate 43, and Lower horizontal plate 44
Constitute the upper moving frame 40. The ends of the upper horizontal plate 43 and the lower horizontal plate 44 have two rods 40.
a (see FIG. 3) are connected to each other.

A support frame 34 integral with the above-mentioned front-rear slide base 33.
A lower arm 36 is projected downward at the lower end of the upper arm 37 and an upper arm 37 is mounted on the upper horizontal plate 43 of the upper moving frame 40.
Is horizontally fixed toward the front-rear sliding table 33 side. Then, between the upper arm 37 and the lower arm 36, two vertical fluid cylinders 38, 3 connected in series with each other are provided.
9, the piston rod 38a of the lower fluid cylinder 38 is connected to the lower end of the lower arm 36, and the piston rod 39a of the upper fluid cylinder 39 is connected to the tip of the upper arm 37.

The strokes of the lower fluid cylinder 38 and the upper fluid cylinder 39 are the same as those of the upper fluid cylinder 39.
Is set larger than the lower fluid cylinder 38.
Therefore, by operating the lower fluid cylinder 38 and the upper fluid cylinder 39 individually or simultaneously, the height of the upper moving frame 40 with respect to the front-back slide base 33 is changed in four steps. That is, the upper moving frame 40 is located at the lower end of the total stroke of both cylinders when the piston rods 38a and 39a are both retracted (see FIG. 1), and is the total stroke when only the lower piston rod 38a is projected. Is slightly lower than the middle of the stroke, and when only the upper piston rod 39a projects, it is slightly higher than the middle of the total stroke, and when both piston rods 38a, 39a project at the same time, the total stroke Located at the top of.

As shown in FIG. 1, the upper moving frame 40
The motor 46 with a reducer is fixed to the upper horizontal plate 43 of the above by the bracket 45 with the output shaft 46a facing downward,
The motor gear 47 is fixed to the output shaft 46a. An intermediate shaft 48 is vertically supported across the central portions of the upper horizontal plate 43 and the lower horizontal plate 44.
An upper intermediate gear 49 (see FIG. 2) meshing with the above-mentioned motor gear 47 is fixed to the upper end of 8, and a second intermediate gear 50 on the lower horizontal plate 44 is fixed to the lower end of the intermediate shaft 48.

On the lower horizontal plate 44, four chuck drive gears 51 (see FIG. 3) are arranged in a horizontal row. This 4
Of the one chuck drive gear 51, the two central parts are provided slightly apart from each other, mesh with the second intermediate gear 50, and both rotate in the opposite direction to the second intermediate gear 50. On the other hand, the chuck drive gears 51 at the left and right ends mesh with the adjacent chuck drive gears 51 in the central portion and rotate in the opposite direction to the chuck drive gears 51 in the central portion. The arrangement pitch of the above four chuck drive gears 51 is
The holes 13a in the supply conveyor 11, the holes 17a in the delivery conveyor 15, and the protrusions 26 of the horizontal arm 25 in the adhesive tank 20 are arranged at the same pitch.

The chuck drive gear 51 is rotatably supported by a bearing 52 (see FIGS. 1 and 2) fixed to the lower horizontal plate 44 via a hollow shaft fixed to the lower surface thereof. A cylindrical holder 53 is fixed to the lower end of the hollow shaft. That is, the chuck drive gear 51 and the cylindrical holder 53 are connected by the hollow shaft rotatably supported by the bearing 52. The cylindrical holder 53 includes a plurality of grip claws 54 protruding downward.
And a chuck for holding the flange portion 10a at the upper end of the mechanical component 10 together with the grip claw 54.

A chuck opening / closing shaft 55 for opening / closing the grip claw 54 is vertically slidably inserted into the center hole of the chuck drive gear 51, and the lower end thereof is the grip claw 54.
The upper end of the piston rod 5 is connected to the piston rod 57a of the chuck air cylinder 57 which is fixed to the lower surface of the upper horizontal plate 43 through the joint 56.
The gripping claw 54 is opened by the protrusion of 7a, and the gripping claw 54 is closed by retracting.

As shown in FIG. 4, T-shaped frames 60 are provided on the left and right sides of the adhesive tank 20 (front side and back side of the paper).
And a cleaning air cylinder 62 and a wiping air cylinder 63 are attached in parallel and swingably with the piston rods 62a and 63a facing upward by a bracket 61 fixed to the outer surface thereof. Wiping air cylinder 6 located on the delivery side (right side in the figure)
The tip of the piston rod 63a of No. 3 is connected to the tip of a wiping drive lever 65 attached by a drive shaft 64 to the delivery side of the upper end arm of the T-shaped frame 60. The tip of the piston rod 62a of the cleaning air cylinder 62 located on the opposite supply side (left side in the drawing) is connected to the cleaning drive lever 66 that is arranged symmetrically with the above-mentioned wiping drive lever 64.

At the end of the upper end arm of the T-shaped frame 60, a support shaft 67 is provided in parallel with the drive shaft 64, a swing lever 68 is provided on the drive shaft 64, and a link 69 is provided on the support shaft 67. And the lower ends of the swing lever 68 and the link 69 are connected to a side plate 71 that supports a box-shaped wiping tool 70 parallel to the adhesive tank 20 to form a parallel link mechanism. Therefore, by the operation of the wiping air cylinder 65, the wiping tool 70 moves the adhesive tank 2
Standby position (solid line position in FIG. 2) close to 0 and adhesive tank 2
It reciprocates between the wiping position (chain line position) above the delivery conveyor 15 away from zero. It should be noted that FIG. 4 shows a link 69 provided with a turnbuckle for length adjustment. Then, the felt 70 a is laid on the bottom of the wiping tool 70.

On the other hand, a cleaning tank 72 is connected to the cleaning drive lever 66 in the same manner as the wiping tool 70 for the wiping drive lever 65 (see FIG. 2), and the cleaning air cylinder 62 operates to clean the cleaning tank. 72 reciprocates between a standby position (solid line position) close to the adhesive tank 20 and a cleaning position (chain line position) above the supply conveyor 11 away from the adhesive tank 20. The cleaning tank 72 is provided with a lid plate 74 that is openably and closably connected by a hinge 73 to the upper edge of the adhesive tank 20 side, and the upper surface of the lid plate 74 is for opening and closing having a fulcrum on the frame. Connected to the tip of the link 75,
As the cleaning tank 72 reciprocates as described above, the lid plate 74
Automatically opens and closes. In addition, in the cleaning tank 72, the cleaning liquid S
As a result, the solvent of the second liquid W is filled.

In the above structure (see FIGS. 1 and 2),
The upper moving frame 40 is located above the outlet side end of the supply conveyor 11, and the piston rods 38a, 39a of the upper and lower fluid cylinders 38, 39 for raising and lowering the upper moving frame 40 respectively project so that the upper moving frame 40 has a total stroke. When located at the upper end, when the machine part 10 to which the first liquid has been applied and dried reaches the end portion on the outlet side, the piston rods 38a and 39a of the upper and lower fluid cylinders 38 and 39 are respectively retracted and moved upward. The frame 40 descends to the lower end of the total stroke, and then the gripping claw 54 of the chuck is closed, and the gripping claw 54 is attached to the supply conveyor 11
The upper mechanical component 10 is clamped.

Next, the respective piston rods 38a, 39a of the upper and lower fluid cylinders 38, 39 project together, and the above-mentioned mechanical component 10 is lifted to the upper end of the total stroke. After that, the upper moving frame 40 is moved to the front-back sliding base 3
3 is conveyed to the upper side of the adhesive agent tank 20 by the forward movement of 3, and the piston rods 38 of the upper and lower fluid cylinders 38, 39
By retracting a and 39a respectively, the upper moving frame 40 descends to the lower end of the total stroke,
The four mechanical parts 10 sandwiched by the grip claws 54 simultaneously enter the adhesive agent tank 20. At this time, the adhesive tank 20
The submersible component receiver consisting of the horizontal arm 25 and the projection 26 inside is located above the liquid surface of the second liquid W.
The lower end of the above-mentioned mechanical component 10 is fitted in 6. Therefore, by opening the gripping claw 54 of the chuck, the mechanical component 10 is handed over to the horizontal arm 25 of the immersion component receiver. Then, by lowering the horizontal arm 25,
The above-mentioned four mechanical parts 10 are immersed in the second liquid W.

After the immersion for a predetermined time, the horizontal arm 25 is raised, the mechanical component 10 is pulled up from the second liquid W, and the grip claws 54 of the chuck are closed, so that the mechanical component 10 is again clamped by the chuck. And the upper and lower fluid cylinders 3
Piston rod 3 of lower fluid cylinder 38 in 8, 39
When only 8a is projected, the upper moving frame 40 rises slightly below the middle of the total stroke (slightly below the opening end of the adhesive tank 20), and the above-mentioned four mechanical parts 10 are projected by the projection 26 of the horizontal arm 25. Away from. After a while,
When the motor 46 with a reducer on the upper moving frame 40 is driven for a predetermined time, its rotation drives the two chucks in the center through the motor gear 47, the first intermediate gear 49, the intermediate shaft 48, and the second intermediate gear 50. It is transmitted to the gear 51 and further to the chuck drive gear 51 on the outer side thereof, and the two chuck drive gears 51 in the central portion and the two chuck drive gears 51 on the outer side rotate in mutually opposite directions and adhere to the mechanical component 10. The excess second liquid W is scattered by centrifugal force, and the scattered second liquid W hits the tank wall of the adhesive tank 20 and flows down to the bottom.
In this case, by lowering the horizontal arm 25 instead of projecting the piston rod 38a, the mechanical component 10
The mechanical component 10 may be rotated by removing the protrusion 26 from the.

After the rotation of the chuck is stopped, the piston rod 39a of the upper fluid cylinder 39 in the upper and lower fluid cylinders 38, 39 projects, so that the upper moving frame 40 rises to the upper end of the total stroke. After that, the upper moving frame 40 is conveyed to the upper side of the end portion on the inlet side of the delivery conveyor 15 by the forward movement of the front-back sliding table 33. Then, the wiping air cylinder 63 is actuated to move the wiping tool 70 at the standby position to the wiping position, and then the piston rod 38a of the lower fluid cylinder 38 for lifting the upper moving frame 40 is retracted, whereby the upper moving frame is moved. 40 descends slightly above the middle of the total stroke, the lower surface of the mechanical component 10 held by the gripping claws 54 of the chuck contacts the felt 70a of the wiping tool 70, and the adhesive on the lower surface of the mechanical component 10 is wiped off. Taken.

When the wiping is completed, the piston rod 38a of the lower fluid cylinder 38 projects and the mechanical component 10
Is lifted to the upper end of the total stroke, the wiping tool 70 is returned to the standby position, and then the piston rods 38a and 39a of the upper and lower fluid cylinders 38 and 39 are respectively withdrawn, whereby the upper moving frame 40
Is lowered to the lower end of the total stroke, and the four machine parts 10 sandwiched by the gripping claws 54 are sent out and placed on the bar 17 of the conveyor 15, and then the gripping claws 54 of the chuck are opened, whereby 10 send out conveyor 1
Handed over to 5.

When the mechanical parts 10 have been delivered, the upper moving frame 40 moves up to the upper end of the total stroke, and then retracts above the supply conveyor 11. Then, after the cleaning tank 72 is moved from the standby position indicated by the solid line to the cleaning position indicated by the chain line by the operation of the cleaning air cylinder 62, the piston rod 38a of the lower fluid cylinder 38 for lifting the upper moving frame 40 is retracted, The chuck descends slightly above the middle of the total stroke and the grip claw 5
4 is immersed in the cleaning liquid S in the cleaning tank 72, and the second liquid W attached to the grip claws 54 is dissolved and removed. Then, the chuck again rises to the upper end of the total stroke, and the cleaning tank 7
After 2 returns to the standby position, the chuck descends to the lower end of the total stroke, and the gripping claw 54 holds the mechanical component 10 on the supply conveyor 11. It should be noted that the above embodiment is the second
Although it is in the liquid dip coating step, it can be similarly carried out in the first liquid dip coating step. Further, in this embodiment, the mechanical parts held by the chuck are transferred to the dipping component receiver which can be moved up and down and immersed in the adhesive, so that the gripping claws 54 are greatly reduced in dirt.

[0030]

As described above, according to the present invention, an adhesive agent tank is provided between the ends of a conveyor configured to convey a plurality of cylindrical machine parts upright in a row in a horizontal row. Since an upper moving frame that moves in both the front-rear direction and the vertical direction is provided above, and a plurality of chucks are rotatably attached to this upper moving frame, stand vertically in a horizontal row on the supply side of the adhesive tank. The multiple mechanical parts that have been conveyed are sandwiched all together and conveyed above the adhesive tank, then lowered vertically and immersed in the adhesive in the adhesive tank, and then pulled up to rotate around the vertical axis. The adhesive can be applied to a uniform thickness by shaking off the excess adhesive, and the adhesive can be delivered to a conveyor on the delivery side of the adhesive tank.

Since the adhesive on the lower surface of the mechanical component is wiped off immediately before the mechanical component is delivered and delivered to the conveyor, the adhesive attached to the lower surface of the mechanical component is not transferred to the delivery conveyor. , The contamination of the delivery conveyor is reduced. Also, after the chuck is returned to the upper part of the supply conveyor by the upper moving frame, the tip of the gripping claw of the chuck is immersed in the cleaning liquid, so that the adhesive adhering to the tip of the gripping claw is removed and the adhesive of the gripping claw is machined. There is no transfer unevenness due to transfer to parts.

[Brief description of drawings]

FIG. 1 is a front view of an upper moving table.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a side view of a drive unit of the wiping device.

[Explanation of symbols]

 10: Cylindrical machine parts 11: Supply conveyor 15: Delivery conveyor 20: Adhesive tank 25: Horizontal arm for dipping machine parts that can be raised and lowered 26: Protrusion 40: Upper moving frame 46: Motor with reduction gear 47: Motor gear 49, 50, 51: Gear 52: Bearing that supports the hollow shaft of the chuck 53: Cylindrical holder that constitutes the chuck 54: Grip claw 70: Wiping tool 70a: Felt 72: Cleaning tank

Claims (1)

[Claims] 1. The plurality of mechanical parts can be immersed in the lateral one-row arrangement state between the ends of a conveyor configured to convey a plurality of cylindrical mechanical parts upright in a horizontal row. An adhesive tank is provided, and an upper moving frame that can move both in the front-rear direction and in the vertical direction is provided above the adhesive tank. The upper moving frame is provided with a plurality of downward facing gripping claws that can be opened and closed vertically. A plurality of chucks rotatable about an axis are attached at a pitch equal to the arrangement pitch of the mechanical parts, and on the delivery conveyor side of the adhesive tank,
A wiping tool, which is held in a row in a row on the chuck and can contact the lower surface of the machine component sent above the delivery conveyor, is provided between the above delivery conveyor and the standby position near the adhesive tank. A cleaning tank is provided so that it can reciprocate, and on the supply side of the adhesive tank, a cleaning tank capable of immersing the lower ends of the horizontal rows of chucks returned above the supply conveyor is provided above the supply conveyor and near the adhesive tank. An immersion type adhesive application device for machine parts, which is provided so as to be able to reciprocate between the standby position and the standby position.