JP2532274Y2 - Projection cleaning equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection cleaning apparatus for projecting a shot material such as a shot onto a work conveyed by a roller conveyor at a high speed to perform a cleaning operation such as descaling or deburring.

[0002]

2. Description of the Related Art In a conventional roller conveyor-transfer-type projection blasting apparatus in which a workpiece is conveyed by a roller conveyor into a projection chamber for polishing, the workpiece is carried into the projection chamber by a roller conveyor and is carried out of the projection chamber. The surface is polished on the roller by the projection flow of the projection material projected from the projection device in between.

[0003]

However, the work conveyed by the rotation on the rollers of the roller conveyer is polished on its upper surface and side surfaces when passing through the blasting area, but the roller conveyer device is damaged. Therefore, when the entire surface of the workpiece needs to be polished, the workpiece that has passed through the blasting area and has been polished on the upper and side surfaces is turned upside down or turned over outside the projection chamber. The bottom side, which is the unprocessed part, must be positioned on the top or side surface, then transported again into the projection chamber by a roller conveyor, and passed through the blasting area to perform blasting. , And there is a problem in that it must pass through the projection chamber twice.

[0004]

SUMMARY OF THE INVENTION The present invention has been completed for the purpose of a blasting and cleaning apparatus which has solved the above-mentioned problems, and carries out blasting by carrying a workpiece into a projection chamber by a roller conveyor. In the cleaning device, a downward rotating shaft is provided on a ceiling wall of the projection chamber so as to be able to move up and down, and the rotating shaft has a plurality of frame bodies in which a work holding girder at a leg end is interposed in a gap between rollers when the rotating shaft is lowered. A basket-shaped work holder is attached.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on the illustrated embodiment. Reference numeral 1 denotes a box-shaped projection chamber. On one side wall of the projection chamber 1, as shown in FIG. 2, a projection device 2 for forming a projection flow of a projection material obliquely downward and an obliquely upward projection chamber 2. Projection devices 3 for forming a projection flow are provided, respectively, and the projection flow of the two projection devices 2 and 3 forms a projection polishing area 4 shown by a hatched area in FIG. In the lower part of the projection chamber 1, a roller conveyor 5 for transporting the work is installed in a direction crossing the blasting area 4, and each roller 6 has a predetermined shape by a bearing provided on a frame or a side wall (not shown). A roller chain 8 is engaged with a chain gear 7 which is supported at intervals and is attached to each shaft, and each roller 6 is rotated by the roller chain 8 driven by a driving device (not shown). I have.

A lifting device 9 for a work holder 24, which will be described later, is mounted on the ceiling wall of the projection chamber 1. The lifting device 9 is mounted on a bracket 10 erected on the ceiling wall.
11 a pair of parallel guide bars 1 held by
Guide bars 13 are movably mounted on each guide bar 12, respectively.
A flat base 14 is horizontally mounted and held over three spaces. A gate-shaped connecting member is erected on a base 14 between the guide bars 12, 12. The connecting member 15 has a piston of a vertical hydraulic cylinder 16 installed on the ceiling wall of the projection chamber 1. By connecting the tip of the rod 17 via a joint fitting 18 and moving the piston rod 17 up and down by the operation of the fluid pressure cylinder 16, the base 14 slides on the guide cylinders 13, 13 engaged with the guide bars 12, 12. Ascends and descends horizontally for use.

Reference numeral 19 denotes a vertical rotary shaft which is supported by a base 14 via a bearing 20. The lower side of the rotary shaft 19 is the projection chamber 1
Is located in the projection cleaning area 4 formed in the projection chamber 1 through the ceiling wall, and the upper side of the rotating shaft 19 is provided by a motor 22 attached to the base 14 and a speed reduction unit 23 such as a worm mechanism. Thus, the rotary shaft 19 is moved up and down together with the base 14 by the fluid pressure cylinder 16 and rotated by the drive device 21. Further, a cage-like work holder 24 is attached to a lower portion of the rotating shaft 19. When the rotating shaft 19 is lowered, the work holder 24 moves the work holding girder 2 at the leg end into the gap between the rollers 6 of the roller conveyor 5.
Reference numeral 5a denotes a cage having a plurality of frames 25 to be interposed, and in the embodiment, the cage has a rough corner cage made of a rod material such as a steel pipe. That is, the rotating shaft 19 is lowered and the rollers 6, 6
The work holding girder 25a at the end of the leg is interposed in the gap between them, and the work W which has moved on the roller 6 rotates by the rotation positioned above the work holding girder 25a, and the rotating shaft 19 rises. The work holder 24 has a structure in which a plurality of rectangular vertical frames 25 are arranged and connected in parallel at intervals so that they can be received, lifted, lowered onto the rollers 6 and transferred. When the work holder 24 is lowered while holding the frame 25 in parallel with the axis of the roller 6, the work holding girder 25a on the lower side of each frame 25 is a roller. The work holding girder 25a is configured to stop at a position lower than the upper surface of the roller when the work holder 24 reaches the lowermost position when the work holder 24 reaches the lowest position. Body 25 is wa It has an opening 26 (see FIG. 2) of a size that does not impede passage of the workpiece.

Reference numeral 27 denotes a control device for positioning the work holder 24 in a predetermined posture with respect to the roller conveyor 5 when the work is transferred to the roller 6. In the embodiment, the control device 27 controls the horizontal position of the holder 28 mounted on the connecting member 15. A proximity switch 29 attached to the protruding portion, and an operating body 30 correspondingly attached to the upper part of the rotary shaft 19,
The rotation of the rotary shaft 19 is counted by the proximity switch 29 and the operating body 30, and when the work holder 24 is lowered, the frame 25 is rotated.
Is always in a position parallel to the axis of the roller 6.
1 to stop the operation. Further, the connecting member 1
5, a proximity switch 31 is mounted, and a corresponding operating body 32 is mounted on the rotating shaft 19 adjacent to the operating body 30. This control mechanism controls the error of the rotation stop position of the rotating shaft 19. For correction, 33 is a connecting member of each frame 25 of the work holder 24, 34 is a work entrance formed in the projection chamber 1, 35 is a cover of the entrance 34, and W is a work.

[0009]

In the thus constructed apparatus, first, the work holder 24 is held at the lowered position by the elevating device 9, and the work holding girder 25a on the lower side of each frame 25 is positioned below the upper surface of the roller 6. When the roller conveyor 5 is operated to rotate the roller 6 via the roller chain 8 and the chain gear 7, the work W on these rollers 6 is carried into the projection chamber 1 from the entrance 34. When the work holder 24 advances through the opening 26 to a predetermined position in the projection polishing area 4 where the work holder 24 stands by, the roller conveyor 5 is stopped by a sensor (not shown) or the like, and the work W It is located on the digit 25a. Next, when the piston rod 17 is raised by operating the fluid pressure cylinder 16 of the elevating device 9, the base 14 is guided by the guide bars 12, 12, and the base 14 is raised horizontally. Rise. On the way, the work holding girder 25a of each frame 25 of the work holder 24 comes into contact with the lower surface of the work W on the rollers 6 and 6, and the work W is placed on the plurality of work holding girder 25a and It is picked up and held, transferred to the work holder 24 and stored. When the rotating shaft 19 reaches the predetermined rising position in this way, the operation of the fluid pressure cylinder 16 is stopped by a limit switch or the like (not shown) and the rising of the rotating shaft 19 ends, and the work W in the work holder 24 is It is held in a predetermined suspended state in the blasting area 4.

Subsequently, when the driving device 21 is operated, the rotating shaft 19 is rotated with the work holder 24 via the motor 22 and the speed reduction portion 23, and the projection devices 2, 3 are operated together with the rotation shaft 19, thereby suspending the device in the air. The workpiece W horizontally rotating in this state is blasted by receiving the projection flow in the entire upper, side, and lower surfaces in the blast cleaning area 4 where the blasting material is projected from above and below. When the predetermined projection time has elapsed, the driving device 21 is stopped by a timer or the like, and the rotation of the rotating shaft 19 is stopped. At this time, the operation of the control device 27 causes the rotation shaft 1
The rotation stop position of the work 9 is controlled, and the frames 25 of the work holder 24 connected thereto are stopped in a state where they are positioned in parallel between the rollers 6. Thereafter, when the fluid pressure cylinder 16 is reversely operated to lower the piston rod 17, the rotating shaft 19 and the work holder 24 are lowered together with the base 14, and the work holding beam 2 on the lower side of each frame 25 is moved.
5a is lowered between the rollers 6 and 6, and the work holding beam 2
When the position 5a is lower than the upper part of each roller 6, the processed work W held on the work holding girder 25a is received on the rollers 6 and transferred. When the work holder 24 reaches the predetermined lowering position in this way, the operation of the fluid pressure cylinder 16 is stopped by the limit switch or the like, and the lowering of the base 14 or the like is stopped. afterwards,
The work W, which has been transferred onto each roller 6 by the operation of the roller conveyor 5 again, is carried out of the projection chamber 1 through an opening 26 (not shown) similar to the inlet 34 through the opening 26, while the next work During this time, W is carried into the projection chamber 1 through the inlet 34, and the above operations are repeated to perform continuous cleaning.

The projected material is reflected from the work W or falls from the cage-like work holder 24 and is collected and returned to the projection devices 2 and 3 again. The projection device is of an air blast type. Is also good.

[0012]

[Effects of the Invention] As is clear from the above description, the present invention allows the work carried into the projection chamber by the roller conveyor to be horizontally suspended in a suspended state by the work holder in the blasting area. Simultaneous blasting allows the entire blasting process to be performed in a single blasting process, and eliminates the need for reversal re-cleaning of the work. In addition, since the work holder is in the form of a cage, it is effective for projecting and collecting projectiles on the work. There is almost no effect and the cleaning is performed very efficiently. Therefore,
The present invention has an extremely large practical value as a solution to the problem of this type of conventional projection cleaning apparatus.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing the embodiment of the present invention.

FIG. 3 is a plan view of a lifting device and a driving device of the projection chamber in the embodiment of the present invention.

FIG. 4 is a perspective view showing an embodiment of the work holder according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Projection room 5 Roller conveyor 6 Roller 19 Rotation axis 24 Work holder 25 Frame 25a Work holding girder

Claims (1)

(57) [Scope of request for utility model registration] In a projection cleaning apparatus for carrying out polishing by transporting a work into a projection chamber (1) by a roller conveyor (5), a downward rotating shaft (19) is attached to a ceiling wall of the projection chamber (1). The rotating shaft (19) is provided with a roller
(6), a cage-like work holder (2) provided with a plurality of frames (25) in which a work holding girder (25a) at the leg end intervenes in the gap between (6) and (6).
4) A projection blasting device characterized by having attached thereto.