JPH0444597Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a sorting device that is used during the production line of sheet glass to discard defective sheet glass that has bubbles, scratches, etc. is a part of the roller group that carries the plate glass,
The present invention relates to a sorting device for conveying plate glass, which is provided with a posture switching mechanism that switches between a conveyance working posture and a sorting posture in which the rollers on the downstream side of the conveyance position are positioned lower.

[Prior art]

This type of conveyor plate glass sorting equipment includes:
As shown in FIG. 7, the transport upper end of the movable support frame 51 that supports the group of movable rollers 50 is vertically swung around the horizontal axis X with respect to the fixed support frame 53 that supports the group of fixed rollers 52. There is a known structure in which a hydraulic cylinder 55 constituting the attitude switching mechanism is installed between the transport lower side portion of the movable support frame 51 and the fixed part 54 (see the literature). cannot be shown).

In this type of sorting device, the movable roller 5
The length of the 0th group in the conveyance direction, that is, the sorting zone length L, is set based on the maximum product dimension of the glass plate G to be conveyed, and the conveyance interval P of the glass plate G
is expressed as P=(V ₁ /V ₂ −1)l, where l is the length of the glass plate G in the transport direction, V ₁ is the line speed, and V ₂ is the outflow speed of the continuous ribbon glass plate.

Therefore, the length of the sheet glass G in the conveying direction is l
becomes shorter, and as the outflow speed _V2 of continuous ribbon-shaped glass sheets becomes faster, the transport interval P of the glass sheets G becomes shorter, so that as shown in FIG. In some cases, the leading end of a good subsequent glass plate G has already moved into the sorting zone L while the defective preceding glass plate G is located.

At this time, the fixed roller 5 of the succeeding plate glass G
Since the tip portion protruding from the second group is bent and hangs down from the conveying surface, when the movable roller 50 group returns to the conveying posture in this state, the protruding tip of the succeeding plate glass G is moved by the movable roller 50 located on the upper side of conveyance. This causes the lower surface of the portion to push up, and as a result, even a good plate glass G may be scratched or cracked.

Moreover, the faster the return speed of the group of movable rollers 50 to the conveyance working position is, the greater the impact force applied to the subsequent plate glass G, and in addition, the inertia force causes the group of movable rollers 50 to move upwards above the conveyance surface. Coupled with the fact that it becomes easy to overrun, there is a problem of promoting the occurrence of the above-mentioned scratches and cracks.

In addition, if the line speed V ₁ is made faster than the outflow speed V ₂ of continuous ribbon-shaped plate glass,
Although it is possible to increase the conveyance interval P of the plate glass G, increasing the line speed _V1 leads to poor cleaning, poor drying, etc., so there is a limit.

[Problem that the invention attempts to solve]

An object of the present invention is to provide a sorting device for conveyed glass plates that can suppress damage to the leading end of a succeeding glass plate when the movable roller group returns, regardless of the interval at which the glass plates are conveyed.

[Means for solving problems]

The conveying sheet glass sorting device according to the present invention is characterized in that the movable roller of the movable roller group located on the upper side of conveyance is operated to return to the conveying working position earlier than the movable roller located on the lower side of conveyance. It is characterized by the provision of means, and its effects and effects are as follows.

[Effect]

Among the movable roller groups, the movable roller located on the upper side of the conveyance completes its return to the conveyance working position before the other movable roller groups, so that, for example, a leading plate glass of a defective product is positioned above the movable roller group in the sorting position. Even if the leading edge of a good succeeding glass plate has already moved into the sorting zone, the leading edge of the succeeding glass plate can be supported at an early stage by a movable roller that returns in advance. It can prevent drooping.

Moreover, along with this, it becomes possible to set the return speed of the other movable roller groups to a slow speed.
It is possible to reduce the impact force acting on the lower surface of the glass plate, and also to suppress overrun due to inertial force.

[Effect of idea]

Therefore, even if the conveyance interval of the glass plates is shortened due to various production conditions such as the length of the glass plates in the conveying direction and the flow rate of continuous ribbon-shaped glass plates, the speed of the movable roller group after sorting defective glass plates can be reduced. It was possible to suppress damage to the leading edge of the succeeding plate glass during return, and as a whole, it was possible to achieve an improvement in yield while increasing productivity.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

Figure 3 shows an outline of a plate glass production line, and includes a defect detection device S 1 that detects defects such as bubbles and scratches in plate glass G that is formed into a band of a predetermined width and continuously conveyed from a glass melting furnace (not shown _). , a first cutting device A that forms a cut line a for cutting and separation along the conveyance direction in the long strip-shaped plate glass G;
a second cutting device B that cuts and separates along the cutting line;
A developing device C widens the adjoining interval between the glass plates G cut and separated into a plurality of pieces along the cutting line a in the width direction of the conveyance path, a defect detection signal from the defect detection device _S1 , and the glass plates G are conveyed to a predetermined position. A sorting device D is disposed to take out and discard defective plate glass G having defects downward from the conveyance path based on a detection signal from a presence/absence detection sensor _S2 that detects whether or not the glass has been removed.

The sorting device D is constructed as follows.

As shown in FIGS. 1, 2, and 4, a large number of support shafts 4A rotatable around a horizontal axis are installed on a fixed support frame 2 connected to the upper part of a transport frame 1. A group of a plurality of rollers 5A for placing and conveying plate glass G is attached to each of these support shafts 4A at predetermined intervals in the direction of the axis of rotation.

A plurality of pillars 1A of the transport frame 1, which are erected between the fixed support frames 2, 2 adjacent in the transport direction, are each provided with a plurality of pillars that are vertically swingable around the first horizontal axis _X1 on the upper side in the transport direction. A movable support frame 3 is attached, and each of these movable support frames 3 has the first horizontal axis center.
A large number of support shafts 4B are pivotally connected to each other, and each of the support shafts 4B is rotatable around a horizontal axis parallel to _X1 .
A roller 5B for placing and conveying the plate glass G is attached.

Hydraulic cylinders 6 are installed across each of the movable support frames 3 and the mounting frame 1B of the transport frame 1 to vertically swing these movable support frames 3 about the first horizontal axis _X1 . The roller 5B supported by the movable support frame 3
A posture switching mechanism E is configured to switch the group independently for each movable support frame 3 between a conveyance working posture and a sorting working posture located as far downward as the roller 5B located on the downstream side of the conveyance.

At a plurality of locations adjacent to the movable support frame 3 and spaced apart from each other by a predetermined interval in the width direction of the transport path, there are movable shafts that are vertically swingable about the second horizontal axis X ₂ with respect to the support column 1A of the transport frame 1. Arm 7 is attached. A support shaft 4C that is rotatable around a horizontal axis parallel to the first horizontal axis _X1 is attached to each of these arms 7 at a position facing the movable roller 5B on the uppermost side of the movable support frame 3. In addition to being pivotally mounted, each support shaft 4C has a
Install the roller 5C for placing and conveying the plate glass G,
In addition, a quick return means F is provided for returning these movable rollers 5C to the conveying position earlier than the group of movable rollers 5B on the movable support frame 3 side.

This quick return means F has an air cylinder 8 installed between the arm 7 and the support column 1A of the transport frame 1 for switching the movable roller 5C between the transport action position and the sorting position in which the movable roller 5C is retired downward. Defect detection signal of defect detection device S ₁ and existence detection sensor S ₂
A controller 9 is provided to control the operation of the electromagnetic valve V ₁ interposed in the air supply circuit of the air cylinder 8 and the electromagnetic valve V ₂ interposed in the hydraulic pressure supply circuit of the hydraulic cylinder 6 based on the detection signal. be.

This controller 9 is configured to first extend the air cylinder 8 via the electromagnetic valve V ₁ and then extend the hydraulic cylinder 6 via the electromagnetic valve V ₂ when returning to the sorting attitude. There is.

Therefore, as shown in FIGS. 1A to 1C, among the groups of movable rollers 5B and 5C, the movable roller 5C on the arm 7 side is the same as the movable roller 5 on the movable support frame 3 side.
Since the return to the conveying position is completed before group B, for example, when the leading glass sheet G of a defective product is positioned on the group of movable rollers 5B and 5C in the sorting posture, the front end of the succeeding glass sheet G of good products has already been sorted. Even when the glass plate G moves into the zone, the tip part of the glass plate G can be prevented from drooping by supporting the tip part of the glass plate G at an early stage by a movable roller 5C which returns in advance.

Therefore, when the group of movable rollers 5B returns after sorting the defective glass plates G, it is possible to prevent damage to the tip portion of the succeeding glass plate G.

Next, another example will be described.

(A) Figures 5A and 5B show a case in which the posture switching mechanism E and the quick return means F are combined, and this allows the movable support frame 3 supporting the movable rollers 5B and 5C groups to be It is configured to be bendable around the third horizontal axis X ₃ located in the middle in the conveyance direction, and a first hydraulic cylinder 10 is provided between these support frame portions 3A and 3B, and a support located on the upper side of the conveyance. Second hydraulic cylinders 11 are installed between the frame portion 3A and the transport frame 1, respectively.

When a defective sheet glass G is transported, the second hydraulic cylinder 11 is contracted and the support frame portions 3A, 3B are aligned with the first horizontal axis.
It swings downward in unison around _X1 and switches to the sorting posture. When a good plate glass G is transported during this sorting work, the second hydraulic cylinder 11 is extended and at the same time the first hydraulic cylinder 10 is contracted, so that the tip of the non-defective glass plate G is completely returned and transported. The glass sheets G are received and supported by the group of rollers 5C of the support frame portion 3A on the upper side, and the support frame portion 3B on the lower side of conveyance is maintained in a sorting posture to complete the destruction of the defective plate glass G.

(b) Figure 6 also shows the posture switching mechanism E and quick return means F.
This shows a case in which the movable support frame 3 that supports the movable rollers 5B and 5C group is used.
The upper end of the transport frame 3 is fixed to the transport frame 1, and the movable support frame 3 is made of a material that can be elastically deformed downward.

When a defective plate glass G is transported, the hydraulic cylinder 12 is contracted to switch the movable support frame 3 to a sorting posture in which the movable support frame 3 is elastically deformed downward. When good plate glass G is transported during this sorting process,
By slightly extending the hydraulic cylinder 12,
A movable roller 5 located on the upper side of the movable support frame 3
C is operated to return to the conveyance action position earlier than the group of movable rollers 5B located on the downstream side of conveyance.

(c) In the above-described embodiment, a fluid pressure cylinder such as a hydraulic cylinder or an air cylinder was used as the drive source for the attitude switching mechanism E and the quick return means F, but it is also possible to use other actuators such as a motor. Good too.

(d) In the above embodiment, the sorting device D that discards the plate glass G that has been divided into a plurality of pieces in the width direction of the conveyance path has been described, but the present invention can be applied and implemented to the sorting device D that discards the plate glass G that has not been divided. Of course it's a good thing to do.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the conveying plate glass sorting device according to the present invention, in which Figure 1 is a partially cutaway side view, Figure 2 is a plan view of Figure 1, and Figure 3 is a plate glass production machine. A schematic diagram of the line, and FIGS. 4A to 4C are side views of main parts showing the sorting process. FIGS. 5A and 5B are side views of the main parts during the conveyance action and the sorting action, showing another embodiment, and FIG. 6 is a side view of the main parts during the sorting action, showing another embodiment. It is. 7th
The figure is a side view of the main parts of a conventional sorting device. 3...Movable support frame, 3A...Support frame portion, 5
A, 5B, 5C...roller, E...posture switching mechanism, F...quick return means, G...plate glass.

Claims (1)

[Claims for Utility Model Registration] Rollers 5A, 5 for placing and conveying sheet glass G
A conveying plate glass sorting apparatus is provided with a posture switching mechanism E for switching some of the groups 5B and 5C between a conveyance working posture and a sorting posture located lower toward the lower side of the conveyance, wherein the movable roller Conveying plate glass provided with quick return means F for returning the movable roller 5C located on the upper side of conveyance of groups 5B and 5C to the conveyance working position earlier than the movable roller 5B located on the lower side of conveyance. sorting equipment. Sorting of conveyed plate glass according to claim 1, wherein the quick return means F is configured to move the movable roller 5C on the upper side of the conveyance up and down independently of the other movable rollers 5B group. Device. The quick return means F configures the movable support frame 3 that supports the groups of movable rollers 5B and 5C to be bent vertically at a plurality of locations in the conveyance direction, so that the support frame portion 3A located on the upper side of the conveyance is conveyed faster. The conveying plate glass sorting apparatus according to claim 1, which is configured to be operated to return to the working position.