JPS5948211B2 - How to store plate glass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for storing sheet glass that is cut into product dimensions and transported.

Plate glass strips that are continuously produced industrially are cut into predetermined product dimensions in a cutting process, sent to a storage process, and stored in storage means such as pallets and shipped.

In this process of sequentially storing the glass sheets that are continuously transferred, the glass sheets are also stored during the exchange of full pallets, that is, during the time of removing the full pallet and installing a new empty pallet. Since they are being sent one after another, a preliminary storage process was necessary to continue storing them during that time.

Therefore, there were disadvantages in that equipment costs were high and maintenance and inspection required a lot of manpower.

An object of the present invention is to provide a method for storing plate glass that does not require such a preliminary storing process.

That is, in the present invention, a temporary storage device for sheet glass is provided in the middle of the transfer path, and when a pallet is replaced, the sent glass sheets are stored in the temporary storage device, and a new pallet is set and the intervals between the sent glass sheets are set at a predetermined interval. When the value is greater than or equal to , the stored plate glass is sent out from the temporary storage device to the transfer path.

In general, when cutting a plate glass band, it is rare that the glass sheet is cut to the final size all at once, but usually it is cut to the final size after going through several cutting steps.

In this case, the cut glass sheets are transported at a faster speed than before cutting in order to prevent breakage due to mutual contact, so the final cut glass sheets are separated by each piece of glass sheet separated by the first step of cutting. The plate glass pieces that have been subdivided form one group, and each group is transported at intervals.

The temporary storage device can then deliver the stored glass sheets to the transfer path at locations where the distance between the glass sheets between said groups is large.

Further, defective portions are detected in an inspection step provided before the cutting step, and after cutting, the plate glass containing the defective portions is removed from the transfer step.

Therefore, even in locations where the glass plates are rejected as defective and are spaced widely apart, the glass plates can be sent out from the temporary storage device.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the steps from the first stage cutting process to the storage process.

In FIG. 1, A and B indicate the range of the conveying path of the plate glass; the conveying path A;

B is composed of, for example, a roller conveyor.

The transfer path A is provided with a first-stage cutter 1 that runs on a rail provided diagonally with respect to the direction of the transfer path, a folding roll 2 downstream thereof, and turntables 3a, 3b, and 3C. There is.

The transfer path B is configured in three rows downstream of each turntable 3a, 3b, 3C, and each transfer path B includes second stage cutters 4a, 4b, 4C, folding rolls 5a, 5b,
5C, sheet pile processing devices 6a, 6b, 6C, and temporary storage devices 7a, 7b, 7C.

Furthermore, storage devices 8a, 8b, and sc are provided at the downstream end of the transfer path B.

Temporary storage device 6a. 6b, 6C are controlled by control circuits 9a, 9b, 9C as will be explained in detail later.

One of temporary storage devices 7a, 7b, 7C 7 and storage device 8a
, 8b, and 8C are combined in the transfer path B in FIG. 2.

The temporary storage device 7 includes a frame 14 consisting of a vertical support 12 sandwiching the roller 11 of the roller conveyor 10 and a horizontal bar 13 parallel to the roller 11, and a cylinder 15 that raises and lowers the frame 14.
and an X-shaped movable leg 16.

The frame body 14 is arranged so that, for example, ten sheets of glass can be stored therein.

With this configuration, the temporary storage device 7 can store glass plates by raising the frame 14 while the glass plates are positioned on the rollers 11 between the frames 14, and vice versa.
By lowering the frame 14, the plate glass placed on the horizontal bar 13 of the frame 14 can be discharged onto the roller 11.

The storage device 8 consists of a pallet 18 placed on a turntable 17.

The plate glass discharged from the downstream end of the conveyor 10 is removed manually or by a known automatic removal device (not shown) and stored on a pallet 18.

When one pallet 18 is full, the turntable 17
is rotated and a new empty pallet 18' is set.

- In the configuration shown in FIGS. 1 and 2, the glass sheets are housed in the following steps.

That is, the plate glass 20 fed in a continuous band form from the furnace along the transfer path A is scored in the width direction by the cutter 1 and broken by the folding rolls 2.

The transport speed downstream of the folding roll 2 is set higher than the transport speed upstream thereof, so that the broken glass sheets 21, 22, etc. are transported while maintaining a predetermined interval. The three glass plates arrive at turntables 3a, 3b, and 3C almost simultaneously.

When the arrival of each glass plate is detected by the photoelectric element PH1, the turntables 3a, 3b, and 3C change the traveling direction of the glass plates by 90 degrees, and the glass plates are divided into three rows and transported along the transfer path B. .

Of course, the number of columns can be arbitrarily selected according to needs.

The glass plates coming out of the turntables 3a, 3b, 3C are sent to cutters 4a, 4b, 4C, where they are scored and then broken into pieces by folding rolls 5a, 5b, 5C.

The conveyors downstream of the folding rolls 5a, 5b, 5C are set at a higher speed than the conveyors upstream, and the divided sheet glass is passed through the sheet pile processing devices 6a, 6b while maintaining the interval.
, sent to 6C.

Sheet pile processing devices 6a, 6b. 6C stores the output signal of a defect detection device (not shown) provided upstream of the first stage cutter 1, and when a glass plate containing defects reaches the sheet pile processing device, the glass plate is transferred from the transfer path B. Exclude.

The missing portion DG shown by the chain line in FIG. 1 indicates that the glass plate including the defective portion has been removed.

The plate glass that has exited the sheet pile processing devices 6a, 6b, and 6C is sent to temporary storage devices 7a, 7b, and 7C.

If the storage devices 8a, 8b, 8C are not full, the plate glass passes through the temporary storage devices 7a, 7b, 7C, reaches the downstream end of the transfer path B, is taken out from the conveyor by a takeout device (not shown), and is stored. It is housed in devices 8a, 8b, and 8C.

When the storage devices 8a, 8b, and sc are full and are being replaced, the temporary storage devices 7a, 7b, and 7C operate to store the sent plate glass.

When a new empty storage device is set and the interval between the transferred glass sheets is larger than a predetermined setting value, the stored glass plates are discharged from the temporary storage devices 7a, 7b, and 7C onto the transfer path, and are transferred to the storage devices 8a, 7C. It is stored in 8b and 8C.

Next, referring to FIGS. 1 and 3, the temporary storage device 7a
, 7b, and 7C.

The control circuits 9b and 9C will be explained by taking one of them, the control circuit 9a, as an example.

The transfer path B includes a photoelectric element PH on the exit side of the sheet pile processing device 6a.
2a, photoelectric elements PH3a and PH4a are arranged at the entrance and exit sides of the temporary storage device 7a, and a photoelectric element PH5a is arranged at the downstream end of the transfer path B, respectively.

In addition, there is a storage not possible instruction circuit 23 that indicates that the storage device 8a is full or is being replaced and no further storage is possible, and that the storage device 8a is newly set or has space and is in a state where it can be stored. A storable indication circuit 24 is provided.

The unstorable indication circuit 23 counts the number of glass sheets that have passed through the temporary storage device 7a, and even if it detects that the number has reached the storage upper limit of each storage device 8a, it continues counting the number of sheets stored in the storage device 8a. However, it may be detected that the number has reached the number (m-n) obtained by subtracting the number n of plate glasses existing between the temporary storage device 7a and the storage device 8a from the storage upper limit number m.

The stowable indication circuit 24 can be configured to detect when a new empty storage device is set.

In FIG. 3, when the storage device 8a is full, the storage not possible instruction circuit 23 is turned ON, and when the following plate glass enters the temporary storage device 7a, the charging elements PH31 and PH4a at the entrance and exit of the storage device are sequentially turned ON. .

As a result, the AND gate 25 is turned on and the conveyor stop circuit 26 stops the roller conveyor in the range including the temporary storage device 7a.

At the same time, the AND gate 27 is turned on and the rise instruction circuit 28
operates, and the frame 14 of the temporary storage device 7a starts to rise with the plate glass placed thereon.

When the frame body 14 rises a certain distance, the storage/discharge confirmation circuit 29 is activated and resets the rise instruction circuit 28 and the conveyor stop circuit 26, and the frame body 14 stops rising and the temporary storage device 7a is activated.
The conveyor in the range including the area resumes driving.

Subsequent glass sheets are stored in the same manner.

When the storage device 8a is replaced and a new empty storage device is set, the unstorable indication circuit 23 is turned off, and the storage possible indication circuit 24 is turned on instead.

As a result, even if the legal plate glass enters the temporary storage device 7a,
Since the output of the AND gate 27 remains OFF, the glass plate is transferred past the temporary storage device 7a.

However, when the interval between the sheets of glass coming out of the sheet pile processing device 6a is calculated by the interval calculation circuit 30 from the output of the charging element PH2a, and the value becomes larger than the setting value of the setting circuit 31, the output of the comparison circuit 32 turns ON, and the AND Turn on the output of gate 33.

As a result, the lowering instruction circuit 34 operates and the temporary storage device 7a
The frame body 14 is lowered and the stored plate glass is discharged onto the conveyor.

When the frame body 14 is lowered by a certain distance, the storage/discharge confirmation circuit 29 is activated to stop the lowering.

A setting circuit 31 that sets the interval between glass plates when performing an ejection operation is corrected by a glass plate transfer speed detector 35 and a plate length measuring device 36.

An alarm circuit 37 is provided to confirm whether the plate glass discharged from the temporary storage device 7a has been reliably transferred by the conveyor.

That is, when the frame body 14 is lowered by a certain distance, the output of the storage/discharge confirmation circuit 29 rises, and the rising signal is processed by the pulse delay circuit 38 for a period slightly longer than the time required for the plate glass to reach the photoelectric element PH5a from the temporary storage device 7a. The output of the photoelectric element PH5a is also inverted and sent to the AND gate 39. As a result, the plate glass discharged from the temporary storage device 7a is transferred to the charging element PH5H within a certain period of time. If the output of the AND gate 39 is not reached, the output of the AND gate 39 is turned on, and the alarm circuit
7 is set and an alarm is issued.

As described above, according to the present invention, when the storage device becomes full, the transported plate glass can be automatically temporarily stored, so that a preliminary storage process is not necessary, and the storage process can be extremely simplified.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the overall structure from the cutting process to the storage process of sheet glass according to the present invention. FIG. 2 is a perspective view of a temporary storage device and storage device according to the present invention. FIG. 3 is a diagram showing an example of a control circuit. Explanation of symbols, 1...Cutter, 2...
Folding roll, 3a, 3b, 3C...Turntable, 4a, 4b, 4C--Cutter, 5
a, 5b, 5C...Fold roll, 6a,
6b, 6C... Sheet pile processing device, 7. 7
a, 7b, 7c...Temporary storage device, 8
, 8a, 8b, 8C... storage device, 9a,
9b, 9C... Control circuit.

Claims (1)

[Claims] 1. In a method of sequentially storing cut glass sheets,
Temporary storage means for storing a plurality of glass plates is provided in the middle of a transfer path for transferring the glass plates to the storage means, and when the storage means is full, the glass plates sent thereafter are stored in the temporary storage means, so that the storage means is full. A method for storing glass plates, comprising sending the glass plates from the temporary storage means to a transfer path when the glass plates become storable from the above state and when the interval between the transferred glass plates is larger than a predetermined setting value.