JP2000006028A - Door device for work of blast processing chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the drop of a blast material and the like out of the chamber in the opening and the closing time of a door for work set in a blast processing chamber, to improve the workability of a switching door, and furthermore, to reduce the attaching amount of the blast material, a processing waste and the like to near the switching door to improve the sealing function, so as to prevent the drop of the blast material and the like out of the chamber further. SOLUTION: The opening 9 for work passage is formed to the peripheral wall 7 of a blast processing chamber 1, and a switching door 14 is provided to open and close by the contacting and separating operation from the inner side to the opening 9. The switching door 14 is composed to open and close by the fluctuating operation. A protective cover 10 is set at the upper side of the opening 9, an auxiliary cover 11 for side is attached between the side edge of the protective cover 10 and the peripheral wall 7 of the blast processing chamber 1, and a gas feeding means to feed the air and the like is provided at the lower side of the protective cover 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast processing apparatus for processing a surface by blowing a powdery or granular blast material made of alumina or the like from a blast nozzle on a high-speed gas stream and spraying the workpiece. More specifically, the present invention relates to an improvement of a work door device for taking a work in and out of a blast processing chamber.

[0002]

2. Description of the Related Art In a blasting machine, an operation of taking a work in and out of a blasting chamber is performed through an opening / closing door provided outside a peripheral wall forming the blasting chamber. That is, as a conventional opening / closing door, a sliding door configured to be opened and closed by sliding up and down or laterally along an outer surface of a work passage opening formed in a peripheral wall of the blasting chamber. Doors were commonly used. However, in the case of this conventional door, since the blast material and processing dust scattered during the processing easily adhere to the surface of the door facing the blasting chamber side, the sliding surface is attached to the door when the door is opened and closed. There has been a problem that a blast material or the like enters to lower the sealing function, or falls outside the processing chamber to contaminate the surroundings. In addition, since the blast processing chamber is generally set to a negative pressure during processing to prevent leakage of the blast material, a differential pressure acts on the door, particularly when the door is opened and closed during processing. Therefore, there was a problem in its operability.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and is intended to prevent the blast material or the like from being exposed to the outside when a work door installed in a blast processing chamber is opened and closed. The purpose is to eliminate falling. Another object is to improve the operability of the door. Further, it is another object of the present invention to improve the sealing function by reducing the amount of blast material and processing dust attached to the vicinity of the opening / closing door, and to further prevent the blast material and the like from falling outside the room.

[0004]

In order to solve the above-mentioned problems, the present invention employs a technical means in which an opening / closing door is provided so as to be opened and closed by an operation of approaching / separating from an inside of an opening for a work passage from inside. . Therefore, the problem that the blast material or the like falls outside the processing chamber is almost eliminated. In addition, if the opening and closing door is configured to be opened and closed by a swing operation, a smooth contact and separation operation with respect to the opening can be obtained. further,
If a protective cover is installed above the opening, and a gas supply means for supplying air or the like is provided in a space below the protective cover, the gas is blown out before opening and closing the door in the vicinity of the door. It is possible to prevent the blast material or the like that has adhered from falling off when the door is opened by blowing it away. Further, at the time of blasting, the space below the protective cover can be made a little positive pressure, so that the blast material or the like can be prevented from entering the vicinity of the door. In that case, a side auxiliary cover is attached between the side of the protective cover and the peripheral wall of the blasting chamber, and a partition is also formed on the side surface of the space below the protective cover. The amount of the blast material or the like attached to the door can be more effectively reduced, and the effect of supplying air or the like from the gas supply means can be more effectively exerted.

[0005]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to, for example, a large PDP,
That is, as in the case where blasting is employed as a method for forming ribs on a glass substrate used for a plasma display panel, it is suitable as an opening / closing door in blasting which requires large and high precision, but is installed in a blasting chamber. If it is, it can be applied to other cases. Further, the type of the blast material is not particularly limited, and the present invention is applicable when various blast materials such as alumina are used. Further, it is also suitable for the case where low-pressure air is used as blast air for blowing out the blast material from the blast nozzle. In addition, even if this work door device is used only for the entrance or the exit,
It goes without saying that the work may be used for loading and unloading the work as an entrance.

[0006] Regarding the installation form of the opening / closing door, as described above, it is only necessary that the opening / closing door be installed in the space below the protective cover, protected from the adhesion of the blast material and the like, and capable of reducing the amount of adhesion. Further, as for the manner of opening and closing the door, any structure may be used as long as the door is opened and closed by contacting or separating the opening and closing door from the inside of the blasting chamber with respect to the opening for the work passage. For example, as in the embodiment described later, when the opening and closing operation of the opening and closing door is performed by swinging, the door portion that comes into contact with and separates from the opening only needs to be inside the blasting chamber, and the door portion The oscillating means for oscillating may be arranged outside the blasting chamber. Also,
Needless to say, it can be configured to be mechanically opened and closed using a driving means such as a driving cylinder. In addition, by providing a packing material such as rubber on the joint surface between the opening and the opening / closing door, a sealing function therebetween can be improved.

The gas supply means for supplying air or the like to the space below the protective cover when opening the opening / closing door may be configured to blow out using compressed air or the like introduced from a pressure air supply source. Alternatively, a configuration may be employed in which air or the like is supplied using a differential pressure between the inside and outside of the blasting chamber. In this case, if the outlet for air or the like is installed so as to be directed to the close contact surface between the opening and the opening / closing door, it is extremely effective to improve the maintenance of the sealing function.

Further, as described above, a side auxiliary cover is provided between the side of the protective cover and the peripheral wall of the blasting chamber, and the side surface of the space formed below the protective cover. Since the partition is formed, the amount of the blast material or the like attached to the vicinity of the opening / closing door can be more effectively reduced, and the effect of supplying air or the like from the gas supply means can be more effectively exhibited. it can. In that case, the protective cover is configured to be rotatable, and by using a bellows-like one as a side auxiliary cover,
When the door is closed, the protective cover is pivoted downward along the door to reduce the occupied space. Such a configuration is also possible. That is,
The protection cover may be configured to be rotatable according to the open / close state of the door.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a main part of a blast processing device according to the present invention. In the drawing, reference numeral 1 denotes a blast processing chamber, and inside the blast processing chamber 1, a blast nozzle 2 is provided.
Is installed, and blast processing is performed by blowing the blast particles supplied through the blast material supply pipe 3 onto the work 5 by placing the blast particles on a high-speed airflow such as compressed air supplied through the air supply pipe 4. It is configured. The present invention relates to a work door device for carrying the work 5 into the blast processing chamber 1 and for carrying out the processed work to the outside of the blast processing chamber 1. The blast processing room 1
A collecting device such as a cyclone separator (not shown) is connected to the bottom of the blasting device via a collecting pipe 6, and if necessary, impurities such as processing chips can be removed from the collected blast material and reused. It is configured as follows.

FIG. 2 is a partially enlarged view showing a main part of an embodiment according to the present invention. In the figure, 7 is the blast processing chamber 1
As shown in the figure, an opening 9 for a work passage is formed in a portion of the peripheral wall 7 corresponding to the transport roller 8 for transferring the work 5. Note that L indicates the transport level of the work 5. Above the opening 9, a protective cover 10 is installed in an inclined manner, and a side auxiliary cover 11 is attached between both side portions of the protective cover 10 and the peripheral wall portion 7. Protective cover 1
A space 1 protected from the adhesion of blasting material and the like below 0
2 are formed. In this embodiment, the protective cover 10 is fixed to the peripheral wall portion 7 with a screw 13,
As described above, the peripheral wall portion 7 may be rotatably supported, and may be configured to be rotatable according to the open / closed state of the door. In this case, a bellows-shaped auxiliary cover is used as the side auxiliary cover in order to allow the protection cover 10 to rotate.

The opening 9 for the work passage is configured such that an opening / closing door 14 can be brought into contact with or separated from the inside of the blast chamber 1. A rubber packing 15,
16 are provided to improve the adhesiveness therebetween. The opening / closing door 14 is supported via a swing arm 17 so as to be swingable about a support shaft 18. And the support shaft 18
, A drive arm 19 is fixedly mounted, and the drive cylinder 20 is used to drive the open / close door 14 around the support shaft 18 to drive the open / close operation. Further, an air supply pipe 21 for supplying air to the space 12 is provided in the peripheral wall 7 of the blast processing chamber 1 so that compressed air is supplied from an air supply source (not shown). In the drawing, reference numeral 22 denotes a bearing portion of a support shaft 18 installed on the peripheral wall portion 7, reference numeral 23 denotes a connecting portion for fixing the swing arm 17 and the opening and closing door 14, reference numeral 24 denotes an output shaft of the drive cylinder 20, reference numeral 25 2 shows a support member of the drive cylinder 20 installed on the peripheral wall portion 7.

When the work 5 is carried into or taken out of the blasting chamber 1, compressed air is supplied to the space 12 formed below the protective cover 10 through the air supply pipe 21. And the drive cylinder 20 is driven to lower its output shaft 24, and the opening and closing door 14 is turned around the support shaft 18 via the drive arm 19 and the swing arm 17 as indicated by the arrow. The opening 9 is opened by moving. Then, when the loading or unloading of the work 5 is completed, the drive cylinder 20 is driven to move the output shaft 24 upward, and the opening / closing door 14 is turned around the support shaft 18 in the opposite direction to open the opening 9. Seal. As described above, the opening / closing door 14 of the present invention performs the operation of approaching and separating from the opening 9 from the inside of the blast processing chamber 1.

[0013]

According to the present invention, the following effects can be obtained. (1) Since the opening / closing door is configured to open and close from the inside of the blast processing chamber, the problem that the blast material or the like falls outside the processing chamber and soils the surroundings is solved. (2) Since the opening and closing door is disposed in the space below the protective cover, the amount of blast material and the like attached to the vicinity of the opening and closing door can be significantly reduced, and the opening for the work passage is used instead of the conventional sliding type. Since the door is opened and closed by the operation of coming in contact with and separating from the door, the adhesion of the sealing portion is extremely good, and the negative pressure state of the blasting chamber can be efficiently maintained. (3) It is possible to prevent the blast material or the like adhering to the vicinity of the door from being blown off by blowing out gas before opening the door, and to prevent falling when the door is opened. Further, at the time of blasting, the space below the protective cover can be made a little positive pressure, so that the blast material or the like can be prevented from entering the vicinity of the door. Therefore, the effect (1) is further improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a main part of a blast processing device according to the present invention.

FIG. 2 is a partially enlarged view showing a main part of one embodiment according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blast processing chamber, 2 ... Blast nozzle, 3 ... Blast material supply pipe, 4 ... Air supply pipe, 5 ... Work, 6 ... Recovery pipe, 7
... peripheral wall of the blasting chamber, 8 ... conveying roller, 9 ... opening for work passage, 10 ... protective cover, 11 ... side auxiliary cover, 12 ... space, 13 ... screw, 14 ... opening and closing door,
15, 16: rubber packing, 17: swing arm, 18
... Support shaft, 19 ... Drive arm, 20 ... Drive cylinder, 21
... air supply pipe, 22 ... bearing part, 23 ... connecting part, 24 ... output shaft, 25 ... support member

Claims (3)

[Claims] An opening for a work passage is formed in a peripheral wall portion of a blast processing chamber for performing processing by blowing a blast material onto a work from a blast nozzle and applying the blast material to a high-speed gas flow, and contacting the opening from the inside. A door device for a workpiece in a blast processing room, wherein an opening / closing door is provided so as to be opened and closed by a separating operation. 2. A door apparatus for a workpiece in a blasting chamber according to claim 1, wherein said opening and closing door is configured to be opened and closed by a swinging operation. 3. A protective cover is provided above the opening, a side auxiliary cover is provided between a side of the protective cover and a peripheral wall of the blasting chamber, and a lower side of the protective cover is provided. 3. A door device for a workpiece in a blasting chamber according to claim 1, wherein a gas supply means for supplying air or the like is provided to the blast processing chamber.