JPH0345227Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an automatic developing device equipped with means for transporting a workpiece by means of transport rollers arranged in a staggered manner. This is related to preventing the occurrence of processing unevenness due to pre-processing that occurs when processing is performed continuously or intermittently.

[Conventional technology]

As a means of moving a processed object containing a processing liquid such as a chemical solution or water to the next process, it is transported in the air by transport rollers arranged in a staggered manner and having the same diameter and rotating at the same speed.

[The problem that the idea attempts to solve]

However, according to this conveying means, processing unevenness has occurred on the object to be processed. This is because the processing liquid adhering to the transported object remains on the transport roller, and is deposited on the same position on the next transported object.

To explain this with reference to FIG. 1, as shown in FIG. 1a, the workpiece Y1 is moved left and right by conveyance rollers 1 and ₂ arranged in a staggered manner with the same diameter and rotating at the same speed. As shown in FIG. 1b, when the rear end of the object Y1 leaves the conveyance roller 1, the processing liquid _X1 remains on the conveyance roller 1 with which the rear end of the object _Y1 was in contact.

That is, (1) If the amount of processing liquid adhering to the outer surface of the transport roller is small, uneven processing will occur, so the transport roller should be loaded with a larger amount of processing liquid than is normally required to process the object. The processing liquid is absorbed or attached.

In this way, the object to be processed Y 1 moves relative to the rotating transport rollers 1 and 2 in which the processing liquid is absorbed in a substantially saturated state, and the object to be processed _{Y 1 touches} the outer surface of the transport rollers 1 and 2. When they come into contact with each other, the object to be processed Y ₁ is moved by being pushed by the outer surface of the conveyance rollers 1 and 2 with a predetermined pressure in order to adhere the processing liquid to the object to be processed Y ₁ .

(2) For this reason, for example, among the processing liquid absorbed by the transport roller 1 or attached to the outer surface of the transport roller 1, the excess processing liquid that is not absorbed by the workpiece _Y1 is removed by the transport roller 1 by the above-mentioned predetermined pressure. The transport roller 1 and the workpiece are squeezed out from the
_Apply processing _liquid
As the workpiece Y ₁ moves further relative to the conveyance roller 1, the amount of processing liquid that cannot be absorbed by the workpiece Y ₁ increases.
The amount of X ₁ increases gradually (see Figure 1a).

In this state _, the processing _liquid Since the workpiece Y ₁ is moving, the outer surface of the conveyor roller 1 and the workpiece
It is moving on the surface of Y ₁ .

(3) When the rear end of the workpiece Y ₁ separates from the transport roller 1, the surface tension of the processing liquid X ₁ is greater on the transport roller 1 than on the rear end of the workpiece Y ₁ .
Most of the treatment liquid X ₁ does not move on the outer surface of the conveyance roller ₁ and remains on the portion of the outer surface of the conveyance roller 1 that was in contact with the rear end of the object to be processed Y ₁ . (See Figure 1b).

Therefore, even if the conveyance roller 1 is made of an absorbent elastic material, if it is a material with low absorbency, it will remain on a certain part of the outer surface of the conveyance roller 1, and if it is a material with high absorbency, Since the next object to be processed is processed before being evenly absorbed by the entire surface of the transport roller 1, a certain portion remains on the outer surface of the transport roller 1.

Therefore, the next transported object _Y2 is
As shown in FIG. 1c, when the processing liquid X ₁ remains on the transport roller 1 and is transported to the transport roller 1, it adheres to the workpiece Y ₂ and the workpiece
Similarly to the above, processing liquid X ₂ remains on the transport roller 2 with the rear end of Y ₁ separated, and when the workpiece Y ₂ is transported, the rollers arranged in a staggered manner with the same diameter and rotating at the same speed When the object Y 2 is conveyed in the air by the conveyance roller, the processing liquid X ₂ adheres to the same position of the object Y ₂ where the treatment liquid X ₁ adheres, causing uneven processing on the object Y ₂ . I was letting it happen.

Therefore, in order to solve the above problem, the inventor of the present invention, as a result of various studies, found that when the workpiece is transported by the transport rollers 1 and 2 arranged in a staggered manner and having the same diameter and rotating at the same speed. , to explain using the symbols in FIG. 5, the distance between the axes between adjacent conveyance rollers 1 and ₂ is l;
Calculate the distance between the processing liquid X ₁ left behind and the point where the tip of the next transported object Y ₂ makes contact.
l ₁ ; The distance between the processing liquid X ₂ left behind by the workpiece Y 1 that passed through the conveyance roller ₂ first and the position where the tip of the workpiece Y ₂ that was transported next came into contact is defined as l ₂ The inventors have found that the condition l=l ₂ −l ₁ holds true when doing so, and found that the above problem can be solved if the condition l≠l ₂ −l ₁ is satisfied.

The present invention was devised in view of the above points, and prevents the processing liquid remaining on a portion of the conveyance roller from being transferred to the same place on the conveyed workpiece. The object of the present invention is to provide an automatic developing device that prevents processing unevenness as much as possible.

[Means to solve the problem]

The present invention provides an automatic developing apparatus having a means for transporting a processed material by means of transport rollers arranged in a staggered manner, in which the transport rollers are arranged in such a manner that each of the adjacent transport rollers has a different diameter, or The present invention is characterized in that a speed change means is provided to vary the circumferential speed of each conveyance roller.

[Effect]

With the above configuration, the position of the processing liquid left on the surface of the adjacent rollers changes and is therefore unspecified; however, when looking at the relationship between the adjacent transport rollers, even if the diameters are different from each other, Even if the rotational speed is different, if the operation is continued in the different conditions, the relationship between l and l ₁ and l ₂ will always be specified, and the processing liquid remaining on a portion of the conveying roller will be The images are not overlappingly transferred to the same location on the transported object.

〔Example〕

Hereinafter, embodiments of the present invention will be explained with reference to FIGS. 2 to 5. Note that the same reference numerals are used for the same components as those in FIG.

FIG. 2 shows an embodiment of the present invention, in which a water-absorbing elastic body 3 made of porous rubber or the like is attached to the surface of conveying rollers 1 and 2 arranged adjacently in a staggered manner. This is to prevent the processing liquid from adhering to the surfaces of the transport rollers 1 and 2 as much as possible.

The adjacent conveying rollers 1 and 2 are arranged such that the diameter of the conveying roller 1 is smaller than the diameter of the conveying roller ₂ , for example, so that the distance l between the axes is not equal to l ₂ −l 1. , 2 are arranged with different diameters.

3 and 4 show different embodiments of the present invention, in which the diameters of the conveying rollers 1 and 2 arranged adjacent to each other in a staggered manner are the same, but the distance l between their axes is In order to prevent l ₂ −l ₁ from becoming equal, in the embodiment shown in FIG.
Further, in the embodiment shown in FIG. 4, the drive motors 7 and 8 that rotate the conveyance rollers 1 and 2 separately are provided with speed change means so that the circumferential speeds of the conveyance rollers 1 and 2 are made different.

Next, it will be explained with reference to FIG. 5 that the above configuration prevents the processing liquid remaining on a portion of the transport roller from being transferred to the same location on the transported object.

Figure 5a shows the state when the rear end of the workpiece _Y1 has separated from the transport roller 2 for a predetermined time, and Figure 5b shows the state when the rear end of the workpiece _Y1 has separated from the transport roller 2. After that, the tip of the next workpiece Y ₂ is placed on the conveyor roller 1.
Figure 5c shows the state when the object Y 2 comes into contact with the object Y ₂ .
The state in which the leading edge of the contact roller 2 is in contact with the conveyance roller 2 is shown.

Here, R ₁ , R ₂ : Radius of conveyance rollers 1 _{, 2} V 1 , V ₂ : Circumferential speed of conveyance rollers 1, ₂ , V : Conveyance speed of processed objects Y ₁ , Y 2 , P ₁ , P ₂ : The position where the tip of the workpiece Y ₁ contacts the transport rollers 1 and 2, l ₃ : The distance from the tip of the workpiece Y ₂ to the position where the processing liquid X ₂ adheres to the workpiece Y ₂ , and , and l, l ₁ , l ₂ , X ₁ , X ₂ , Y ₁ , Y ₂ are
This is the same as in FIGS. 1 and 2. Then, t ₁ : Time when the workpiece Y ₁ leaves the transport roller 1 , t ₂ : Time the workpiece Y ₁ leaves the transport roller 2 , t ₃ : Time the workpiece Y ₂ comes into contact with the transport roller 1 N _{1 :} Number of times processing liquid X ₁ passed point P ₁ between time _{t 1} and _time t ₃ , N ₂ : Number of _times processing liquid Let be the number of times it passes through .

FIG. 5a is a diagram when a time tα has elapsed since the rear end of the object to be processed Y ₁ has left the conveyance roller 2 .

In this figure, if we pay attention to the conveyance roller 2,
When the rear end of the object to be processed Y ₁ separates from the transport roller 2, the processing liquid X ₂ adheres to the transport roller 2.
_Let lα 2 be the distance traveled in the circumferential direction of the conveyance roller 2 from point P ₂ , then lα ₂ =V ₂ tα . . .

On the other hand, if we pay attention to the conveyance roller 1, we can see that the
The time it takes for the rear end of Y ₁ to leave the conveyance roller 1 and leave the conveyance roller 2 is (t ₂ −t ₁ ).

In the state shown in FIG. 5a, tα has elapsed since (t ₂ −t ₁ ). The distance traveled by the processing liquid X ₁ attached to the transport roller 1 from point P ₁ in the circumferential direction of the transport roller 1 is _lα
Then, lα ₁ =V ₁ (t ₂ −t ₁ )+V ₁ tα ….

Although not shown here, P ₁ of the processing liquids X ₁ and X ₂ when the rear end of the processed object Y ₁ leaves the conveyance roller 2
If the distances from P ₂ are la ₁ and la ₂ , then tα=0 can be substituted into the above equation, so la ₁ =V ₁ (t ₂ −t ₁ ) la ₂ =0.

FIG. 5b is a diagram when the rear end of the workpiece Y ₁ has left the transport roller 2 and then the leading end of the next workpiece Y ₂ comes into contact with the transport roller 1.

In Fig. 5b, if the distance between the position of the processing liquid X ₁ and la ₁ is lb ₁ , the elapsed time is (t ₃ −
t ₂ ), so lb ₁ =V ₁ (t ₃ −t ₂ ).

From the state shown in Fig. 5b, the workpiece _Y2 is transported,
If the distance that the treatment liquid X ₁ adheres from the tip of the workpiece Y ₂ is l ₁ , then l ₁ = 2πR ₁ (N ₁ +1) − (la ₁ + lb ₁ ) = 2πR ₁ (N ₁ + 1) − V ₁ (t ₃ − t ₁ ) …(1).

Next, paying attention _to the transport _{roller 2} , if _the distance traveled by the position _{of the} processing liquid =V ₂ (t ₃ −t ₂ ).

If the _distance traveled by _the treatment liquid X ₂ from the position of _the treatment liquid _{X 2 in} FIG _{. 2} + 1) - lb ₂ = 2πR ₂ (N ₂ + 1) - V ₂ (t ₃ - t ₂ )...(2).

Here, the distance between the axes l and the workpiece Y ₂ is (t ₂ - _{t 1} )
Since it is moving at a speed V during the time, l=V(t ₂ −t ₁ ) ∴t ₂ =l/V+t ₁ (3).

If the conditions are R ₁ = R ₂ and V = V ₁ = V ₂ , then N ₁ = N ₂ , and by substituting this into equations (1), (2), and (3), (1), By taking the difference between both sides of equation (2), the result l=l ₂ −l ₁ is obtained.

FIG. 5C is a diagram when the leading end of the workpiece Y ₂ comes into contact with the conveying roller 2. FIG.

At this time, the processing liquid X ₂ is at a position that has advanced by l from the position lb ₂ . Therefore, if the distance from the tip of the object Y ₂ to the point where the processing liquid X ₂ is attached is l ₃ , then as is clear from Figure 5 a, b, and c, l ₃ = l ₂ - l It is.

If the conditions are R ₁ = R ₂ and V = V ₁ = V ₂ , then l = l ₂ - _{l 1} as described above, so l ₃ = l ₂ - (l ₂
−l ₁ ), that is, l ₁ = l ₃ , and the processing liquids X ₁ and X ₂ left on the transport rollers 1 and 2 are transferred to the front and back of the workpiece Y ₂ at the same distance from the tip. will be done.

In other words, in the staggered roller conveyance method, as long as conveyance rollers with the same diameter are used and the workpieces are conveyed by rotating them at the same speed, the location where processing unevenness occurs due to pretreatment will always be the same. Furthermore, as the number of conveyance rollers arranged in a staggered manner increases, the number of times that the remaining processing liquid is transferred at the same position increases, and the situation of processing unevenness worsens.

Therefore, to avoid this, please follow (1), (2), and (3) above.
In the equation, the condition l≠l ₂ −l ₁ may be satisfied.

As a concrete means for that purpose, the second
As shown in FIGS. 4 to 4, if the condition of using the conveyance rollers of the same diameter is changed to make R ₁ ≠ R ₂ , or if the condition of same speed rotation is changed to make V ₁ ≠ V ₂ , good. In other words, each adjacent conveyance roller 1,
By changing the diameters of the rollers 1 and 2 or by changing the rotational speed of the adjacent conveying rollers 1 and 2,
It is possible to prevent the remaining processing liquid from being transferred to the same position on the object to be processed. If the rotational speed of each conveyance roller 1, 2 is changed, some conveyance rollers may slip and idle on the object to be processed, but if the conveyance rollers are arranged in a staggered manner, this may hinder the conveyance of the object to be processed. does not occur.

In the case of this embodiment, a water-absorbing elastic body is provided on the surface of the conveyance roller to make it difficult for the processing liquid to adhere to the surface of the conveyance roller, but it is not necessary to provide it, and the surface of the conveyance roller is It is also possible to use a roller material that has a small contact angle in the direction of scattering the processing liquid.

[Effect of idea]

In the present invention, as mentioned above, the diameters of the conveyance rollers arranged in a staggered manner are changed, or the rotational speed of each conveyance roller is changed, so that the processing liquid remaining on the rollers remains in the same place on the conveyed object. are not transferred overlappingly, and uneven processing of the object to be processed can be prevented as much as possible.

[Brief explanation of drawings]

Figure 1 is a diagram for explaining the reason why processing unevenness occurs on objects to be processed using conventional conveyance rollers.
3 and 4 are views showing different embodiments of the arrangement of the conveyance rollers in the automatic developing device of the present invention, and FIG. 5 is for explaining the relationship between the conveyance rollers of the present invention and the processed object. This is a diagram. DESCRIPTION OF SYMBOLS 1, 2... Conveyance roller, 3... Water-absorbing elastic body, 4, 7, 8... Drive motor, 5, 6... Power transmission system, X ₁ , X ₂ ... Processing liquid, Y ₁ , Y ₂ ... Workpiece, l ... Distance between the axes of conveyance rollers 1 and 2, l ₁ ...
The distance between the contact point P ₁ between the processing liquid X ₁ left by the transport roller 1 and the tip of the workpiece Y ₂ , l ₂ ...the distance between the processing liquid X ₁ left by the transport roller 2 and the end of the workpiece Y ₂ Distance to contact position P ₂ .

Claims (1)

[Scope of utility model registration request] In an automatic developing apparatus having a means for transporting a processed material by means of transport rollers arranged in a staggered manner, the transport rollers may have different diameters between adjacent transport rollers or different diameters between adjacent transport rollers. An automatic developing device characterized by being provided with a speed change means for varying peripheral speeds.