JPH0453959B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Field of Application> The present invention is directed to lifting and lowering a hanger in which an open swinging barrel is vertically disposed on each of a plurality of carriers that move intermittently in the horizontal direction along a row of processing liquid tanks. hold controllably;
In a metal surface treatment apparatus, the open swinging barrel is immersed in a processing liquid tank as the hanger is lowered, and the surface treatment of the object to be processed in the barrel is performed. The present invention relates to a drive device for swinging.

<Prior art> In order to simplify the loading and unloading of objects to be processed, the open swinging barrel has an input opening provided on the circumference without a lid. In order to prevent involuntary leakage of objects, it is necessary to reversibly swing within a certain angle range so that the opening does not face downward. The reversible swing angle range is approximately 120 degrees.

In this type of drive device, we have devised a method to simplify the swing mechanism by making it possible to swing multiple barrels by simply installing one reciprocating linear drive body equipped with a swing rack. , Jitsukō 60-32124
It has already been proposed in the issue. This is achieved by fixing a toothless sprocket foil with engaging teeth only in the angular range that corresponds to a predetermined barrel swing angle to the transmission shaft that drives the driven wheel fixed to the side of the barrel. At the position immersed in the processing liquid tank, the sprocket foil is engaged with a rocking rack that reciprocates the sprocket foil.

<Problems to be Solved by the Invention> By the way, as shown in FIG. There is a long processing liquid tank y in the direction of travel where the stop position is set. In such a liquid tank y, the barrel is
When moving to the next stop position, the reciprocating movement of the lock member is stopped, and then the lock member is moved while being immersed in the liquid tank.

For this reason, in the conventional configuration, as shown in FIG. 6, the toothless sprocket foil a has the final tooth b located on the side of the toothless portion in contact with the chain roller d of the rack structure c. Then, the sprocket wheel a (barrel) with missing teeth slightly reverses itself and advances while passing over the roller d. For this reason, the collision between the final tooth b and the chain roller d is repeated many times, causing noise and deteriorating the working environment, and the final tooth b may break due to metal fatigue.

Also, even when the barrel is moving, the surface of the object to be treated is treated in the treatment liquid tank y, but there is no rocking movement during this time and the object to be treated is not stirred. This means that uniform surface treatment cannot be achieved.

The present invention aims to eliminate such drawbacks.

<Means for Solving the Problems> In the above configuration, the present invention removes the swinging rack on the reciprocating linear drive body by a desired travel length between the stop positions, and also attaches a gear to the transmission shaft. Continuing the reversing sprocket foil through the row, the reversing rack meshing with the lower edge of the reversing sprocket foil is parallel to the rack structure, and the toothless sprocket foil reaches the removed portion of the rack structure. The invention is characterized in that it is disposed on the reciprocating linear drive body in a positional relationship in which it engages with the reversing sprocket wheel substantially simultaneously with the reversing sprocket wheel.

<Function> In a liquid tank where multiple barrel stop positions are set, when the barrel moves to the next stop position,
The carrier's hanger remains in the lowered position. The movement between the stop positions is performed by the following steps.

After the reciprocating linear drive body stops reciprocating, the toothless sprocket wheel moves as the carrier moves. Then, the toothless sprocket wheel rotates by the engaging teeth of the swing rack, swings the barrel in the forward direction, reaches the removal section of the swing rack, and is removed from the swing rack.

The reversing sprocket foil then engages the reversing rack. Therefore, as it travels, the reversing sprocket wheel (transmission shaft) rotates in the opposite direction,
This causes the barrel to swing in the opposite direction.

After exiting the reversing rack, the toothless sprocket foil again engages with the end of the reciprocating linear drive near the next barrel stop position. The engagement with the reciprocating linear drive body causes the barrel to swing in the forward direction until the barrel stops.

In addition, if two or more swing rack removal parts are provided on the reciprocating linear drive body between the barrel stop positions, and a reversing rack is provided corresponding to the removal part,
A rocking motion of more than one and a half back and forth is generated between the stop positions.

<Example> An example of the present invention will be described with reference to the accompanying drawings.

In Fig. 1, 1 is a horizontally long main body frame, and a vertical guide column 2 is placed between the upper and lower beams 3 and 4.
The beams 3 and 4, the guide column 2, etc. are supported by an installation frame 5. Upper and lower opposed rail grooves 6 and 7 are provided at the ends of the upper and lower beam members 3 and 4,
Chains 8 and 9 that move at the same speed in the horizontal direction are fitted into these rail grooves 6 and 7, and between the chains 8 and 9, carriers 10 that hold the bracket 11 so as to be able to rise and fall are spaced apart at regular intervals. A large number of them are fixed. A processing liquid tank row x is arranged in the moving direction of the carrier 10.

Reference numeral 13 denotes an elevating frame that slides between two upper and lower positions guided by the guide column 2, and has a hanging jaw plate 14 projecting from its front end. A roller 15 protruding rearward from the bracket 11 is mounted on the upper surface of the hanging jaw plate 14 so as to be rotatably movable.

A hanger 16 projects from the bracket 11 onto the processing liquid tank y, and a pair of hanging arms 1 at the front thereof
An open rocking barrel 19 that accommodates the processed material supplied from the input opening 20 is rotatably supported on a shaft 18 extending between the openings 7 and 17 . In the open swinging barrel 19, a large gear (driven wheel) 21 fixed to the side of the barrel is linked via an intermediate gear 22 to a spiral gear 24 at the front end of a transmission shaft 23 supported horizontally on the hanger 16. As a result, the transmission shaft 23 rotates as the transmission shaft 23 is driven. In addition, the conduction shaft 23
There is also a configuration in which a conduction chain or the like is used as a means for transmitting the rotation to the open swinging barrel 19.

A toothless sprocket foil 25 shown in FIG. 5 is fixed to the rear end of the transmission shaft 23. As shown in FIG. The engagement teeth 26 formed on the foil are provided only within an angular range that corresponds to a reversible swing angle of about 120 degrees that does not lower the input opening 20 of the lidless swing barrel 19, and as described above, In the configuration in which the large gear 21 is interlocked by the spiral gear 24 via the gear 22, when the rotation ratio of the spiral gear 24 and the large gear 21 is 1:2, the forming range of the engaging teeth 26 is shown in FIG. The angle is approximately 240 degrees.

28, as shown in FIG. 4A, is a reciprocating linear drive body supported horizontally by holding rollers 33, 33 on a base plate 27 protruding from the beam 4; A swing rack 29 is provided in which the foil 25 engages. The swing rack 29 is constructed by arranging a large number of chain rollers 30 in parallel. The reciprocating linear drive body 28 is reciprocated by a hydraulic cylinder 34 with a constant stroke. The reciprocating distance of the reciprocating linear drive body 28 is set to match or slightly exceed the circumferential distance between the engaging teeth 26 at both ends of the sprocket wheel 25 with missing teeth.

In the above structure, when the bracket 11 rises due to the engagement of the hanging jaw plate 14 and the roller 15 as the elevating frame 13 rises, the open rocking barrel 19 suspended by the bracket 11 is lifted above the processing liquid tank 12. At the same time, the engaging teeth 26 of the sprocket wheel 25 with missing teeth engage the swing rack 2 on the reciprocating linear drive body 28.
It's out of 9.

Next, along with the carrier 10, the processing liquid tank y for the next process is
The bracket 11 is lowered together with the lifting frame 13, the open swinging barrel 19 enters the processing liquid tank y, and the toothless sprocket foil 25
The engaging teeth 26 of the holder engage the rocking rack 29 again.
Thus, the open rocking barrel 19 can be moved between the processing liquid tanks.

By the way, some processing liquid tanks y are long in the advancing direction and have a plurality of barrel stop positions, as shown in FIG. In the case of this liquid tank y, when moving to each barrel stop position, the open swinging barrel 19 is moved while being immersed in the liquid tank y.

Such a reciprocating linear drive body 28 along the processing liquid tank y has a structure as shown in FIGS. 3 and 4.

That is, the swinging rack 29 on the reciprocating linear drive body 28 is formed above the barrel stop position, and in the meantime, as shown in FIG. , 41 are formed. The intermediate swing rack 40 and the removal parts 41, 41
The lengths should be approximately equal.

Further, an idling shaft 42 is supported by a support plate 50 in parallel with the transmission shaft 23, and a gear 43 fixed to the shaft 42 meshes with a gear 44 fixed to the transmission shaft 23. Then, a gear train is configured in which the rotation directions of the transmission shaft 23 and the idle rotation shaft 42 are reversed.

Furthermore, a toothless sprocket wheel 25 and a reversible sprocket wheel 45 are fixed to the tip of the free rotating shaft 42 at different front and rear positions. This inverted sprocket foil 45 also has missing teeth at positions symmetrical to those of the missing teeth sprocket foil 25. A reversing rack 46 consisting of a large number of chain rollers is disposed on the reciprocating linear drive body 28 in parallel with the swing rack 29. The position of the reversing rack 46 is the same as that of the toothless sprocket foil 25.
Almost at the same time when the sprocket wheel comes off the swing rack 29 and reaches the removing portion 41, 41 position, the reversing sprocket wheel 4
5 is designed to mesh with the reversing rack 46.

The length of the reversing rack 46 is approximately equal to that of the removal portions 41,41. The design is such that the reversible sprocket foil 45 and the reversible rack 46 do not engage while the toothless sprocket foil 25 is engaged with the swing rack 29.

The operation of the above structure will be explained with reference to FIGS. 4A and 4B.

By reciprocating the hydraulic cylinder 34,
The open swinging barrels 19 in their respective stop positions are approximately
Swings within a predetermined angle range of 120 degrees. When moving to the next stop position after rotating by a predetermined angle, the carrier 10 travels without raising or lowering the bracket 11 in the processing liquid tank y where a plurality of barrel stop positions are set. That is, the open swinging barrel 19 in the barrel stop position ( ) temporarily stops swinging when the hydraulic cylinder 34 is released.
As the carrier 10 travels, it moves toward the next barrel stop position ( ).

This process will be explained in detail.

At this barrel stop position (), the toothless portion of the toothless sprocket foil 25 is in the upper position, and the input opening 20 of the lidless swinging barrel 19 is directly above it. When moving from this position () as the carrier 10 travels, the toothless sprocket foil 25
is rotated by 120 degrees due to engagement with the swing rack 29, and reaches a position where the final tooth contacts the chain roller 30 just before the removal section 41, and finally the engagement with the swing rack 29 is released.

Immediately after this release, reverse sprocket wheel 45
The immediate lower edge of the shaft engages with the reversing rack 46, and from this state, the transmission shaft 23 further moves together with the carrier 10, and due to the engagement, the open swinging barrel 19 receives a reversing action while traveling. Then, at the intermediate position where this is released, the toothless sprocket wheel 25 is now engaged with the intermediate swing rack 40, and similarly, as the sprocket wheel 25 moves, the open swing barrel 19 is subjected to forward rotation while traveling.

Furthermore, immediately after the toothless sprocket foil 25 moves to the next removal part 41 and the meshing is released, the reversing sprocket foil 45 and the reversing rack 4
6, the reverse operation is performed again.

Then, in the tilted state, the engagement is released, and while engaging with the swing rack 29 again, it rotates forward and returns to the almost vertical position at the stop position ( ).

Thus, the object to be treated undergoes two reciprocating swings from the stop position ( ) to the stop position ( ), and therefore, even while traveling, the object to be treated is agitated and uniform surface treatment is achieved.

In the above embodiment, the reversing sprocket wheel 45 was toothless in order to ensure its swing angle, but by accurately setting the number of teeth of the reversing rack 46, it can be used as a normal sprocket. It can also be made into foil.

In the above configuration, the reciprocating drive of the hydraulic cylinder 34 may also be operated while the transmission shaft 23 is moving. In this case, the open swinging barrel 19 is subjected to the reciprocating movement of the hydraulic cylinder 34 as well as the reversing sprocket wheel 45, and the movement becomes complex. For this reason, the forward movement speed and the backward movement speed do not match, so consideration may be given to changing the moving speed of the hydraulic cylinder 34 in the forward direction and the backward direction.

<Effects of the Invention> As described above, the present invention includes the steps of: appropriately removing the swinging rack on the reciprocating linear drive body between stop positions;
In addition, since a horizontal reversal rack that meshes with the engaging tooth is supported in correspondence with the removed portion, the collision between the last tooth and the chain roller is repeated many times as the sprocket wheel with missing teeth runs. Moreover, since the reversing rack allows the open swinging barrel to swing even while the barrel is running, the surface treatment can be uniformly applied while the barrel is running. It has a positive effect.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, in which FIG. 1 is a vertical side view of a part of the surface treatment apparatus, FIG. 2 is an enlarged vertical side view of the main part, and FIG. 3 is a main part of the swing rack 29, etc. 4A is a front view showing the operation of the toothless sprocket foil 25 and the reversible sprocket foil 45, FIG. 4B is the same plan view, and FIG. 5 is the liquid tank row x
FIG. 6 is a front view showing the drawbacks of the conventional structure. 10; Carrier, 16; Hanger, 19; Open rocking barrel, 23; Transmission shaft, 25; Missing tooth sprocket foil, 26; Engaging teeth, 28; Reciprocating linear drive body, 29; Rocking rack, 30; Chain roller ,4
0; Intermediate swing rack, 41, 41; Removal section, 4
2; Idle shaft, 43; Gear, 45; Reversing sprocket wheel, 46; Reversing rack.

Claims (1)

[Scope of Claims] 1. A plurality of carriers that move intermittently in the horizontal direction along a row of processing liquid tanks hold a hanger on which an open swinging barrel is suspended in a vertically controllable manner; A toothless sprocket foil, which has engagement teeth only in an angular range corresponding to a predetermined barrel swing angle, is fixed to the transmission shaft that drives the driven wheel fixed to the side of the barrel. At the position where the open swinging barrel is immersed in the processing liquid tank, a reciprocating linear drive body equipped with a swinging rack that engages with the sprocket foil is moved along the liquid tank where a plurality of barrel stopping positions are set. In this apparatus, the swinging rack on the reciprocating linear drive body is removed by a desired travel length between the stop positions, and a reversing sprocket wheel is connected to the transmission shaft via a gear train, A position where the reversing rack that engages with the lower edge of the reversing sprocket foil is made parallel to the rack structure and meshing with the reversing sprocket foil approximately at the same time as the toothless sprocket foil reaches the removed portion of the rack component. In relation to this, there is provided a drive device for an open swinging barrel for surface treatment, characterized in that it is disposed on a reciprocating linear drive body.