JPS6384874A - Shot blast device - Google Patents

Abstract

PURPOSE:To surely prevent a shot blasted article from being bitten and damaged, by arranging a front part roller, so that an adaptation start point of an endless belt to a side drum is positioned in the upper from the drop point of the shot blasted article, and vertically movably providing the front part roller. CONSTITUTION:A front part roller 4, which is provided so that an adaptation start point P of an endless belt 5 to a side drum 6 is positioned in the upper from the dropping point Q of a shot blasted article, is formed being able to vertically swivel. Consequently, the front part roller 4 is set to a position as shown by a full line in the drawing when shot blasting is performed, and under this condition, the adaptation start point P of the endless belt 5 to the side drum 6 is positioned in the upper from the shot blasted article dropping point Q, accordingly the shot blasted article provides no possibility of being bitten between the endless belt 5 and the side drum 6. Accordingly, the shot blasted article can be surely prevented from being bitten and damaged. While the shot blasted article, when it is discharged, can be easily discharged by downward moving the front part roller 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a shot blaster capable of preventing the object to be polished from getting caught during cleaning.

[Problems to be solved by conventional technology and invention]

The endless belt is rotated by a driving roller, a tensile roller, and a front roller, and a cleaning chamber space is formed by the endless belt and a side drum, and the workpieces placed on the endless belt are cleaned. The so-called apron-type shot blasting device has been known for a long time, but when the object to be polished is small or thin, the object to be polished is wedged between the endless belt and the side drum. There were problems such as damage.

The present invention has been made in view of the above points, and an object of the present invention is to provide a shot blasting device that can reliably prevent the object to be polished from being jammed.

[Means for solving problems]

In the present invention, an endless belt stretched between rollers is rotated, and a side drum is rotatably provided on the endless belt to form an article-to-be-polished storage section a, and the article to be polished placed on the endless belt is placed on the endless belt. In a shot blasting device designed to perform polishing, the front roller is installed so that the point where the endless belt and the side drum start contacting each other is located above the point at which the object to be polished is placed, and the front roller is This is a Shored Plast device characterized by being installed so that it can be moved up and down.

〔Example〕

Reference numeral 1 denotes a grinding chamber, in which a drive roller 2, a tension roller 3, and a front roller 4 are provided, and an endless belt 5 is placed over these rollers so as to rotate in an endless manner. It has become. Side drums 6.7 are rotatably provided at both left and right ends of the endless belt 5 in contact with the belt, so that the endless belt has a curved shape at the top, and the articles to be polished 9 are Section 8 is formed. Incidentally, the side drum 6.7 is rotatably pivoted to the side plate of the casing.

An auxiliary roller 9 is provided between the front roller 4 and the tension roller 3, and as shown in FIG. be done.

Further, the support shaft 10 of the auxiliary roller 9 is connected to an operating rod 13, and the operating rod 13 is connected to the piston shaft 1 of the air cylinder 14.
It is connected to 5. Therefore, the front roller 4 is moved to the support shaft 10 of the auxiliary roller 9 by the action of the air cylinder 14.
The front roller 4 is configured to rotate around the front roller 4 so that the front roller 4 can move up and down.

The rotation shaft 11 of the front roller 4 is rotatably supported by an arm 12, but the support shaft 10 of the auxiliary roller 9 is fixed to the arm so that the auxiliary roller 9 can freely rotate with respect to this support shaft 10. +IM has been done. 16 in Figure 4
．． 17 indicates a bearing.

The object to be polished 18 placed on the object to be polished mounting portion 8 on the endless sheet rises as the endless belt 5 runs, but falls when it reaches the lifting limit point. The front roller 4 is installed so that the point P where the belt 5 and the side drum 6.7 start contacting each other is located above the point Q where the abrasive article falls.

19 is a hole provided in the endless belt for dropping the projected abrasive material downward; 20 is a packet elevator-1 for collecting the abrasive material that has fallen from the nucleation 19 and accumulated below;
21 is a rotary screen, 22 is a separator for sieving the abrasive material that is transported upward by the packet elevator 20 and falls, 23 is a supply pipe for sending the separated and collected abrasive material to the projector, and 24 is a 25 is a dust chamber, 26 is a reversible motor that rotationally drives the drive roller 2, and 27 is a sprocket.

In the present invention, the drive source for moving the front roller up and down is not limited to an air cylinder, but may be a hydraulic cylinder. Alternatively, only the support shaft 10 may be provided without providing the auxiliary roller 9.

[Effect]

When the motor 26 is rotated in the forward direction and the drive roller 2 is rotated in the direction of arrow A in FIG. 1, the endless belt 5 rotates and runs in the direction of arrow C, whereby the workpiece 18 to be polished moves upward. The side drum 6.7 in contact with the endless belt rotates in the direction of arrow E as the endless belt rotates.

When the workpiece to be polished rises while shifting, it falls due to gravity when it reaches the limit point of its rise. However, since the endless belt continues to rotate at all times, the dropped object to be polished starts to rise again, and this operation is repeated thereafter. Projection [24
The abrasive material is projected and the cleaning is performed.

During cleaning, the front roller 4 is set at the position shown by the solid line in FIG. In this state, since the contact start point P between the endless belt 5 and the side drum 6.7 is located above the drop point Q of the object to be polished, the object to be polished 18 is connected to the endless belt 5 and the side drum. There is no risk that it will come between 6.7 and 7. Therefore, even if the object to be polished is a small or thin object such as a screw or washer, jamming can be reliably prevented.

After the polishing is completed, the motor 26 is rotated in the reverse direction to rotate the drive roller 2 in the direction of arrow B in FIG. 1, and the endless belt 5 is rotated in the direction of the arrow to discharge the polished product (at this time,
The side drum 6.7 rotates in the direction of arrow F).

However, as mentioned above, since the contact starting point P between the endless belt and the side drum is set at a higher position than usual, the upward lifting angle of the endless belt by the front roller 4 inevitably becomes large, and as a result, , the item to be ground must climb over a high and steeply sloped drain 28;
Under normal conditions, it is difficult to discharge the object to be polished.

Therefore, in order to discharge the object to be polished, the air cylinder 14 is operated to rotate the arm 12 in the direction of arrow G in FIG. At this time, the front roller 4 rotates in the same direction G around the support shaft 10 of the auxiliary roller 9, and descends to the position indicated by two points VI in FIG. As a result, the outlet 28
Since it is located at a low position, the object to be polished can be easily discharged. Note that a receiver (not shown) is placed below to discharge the object to be polished.

After the object to be polished has been discharged, the air cylinder 14 is actuated to perform the opposite operation, and the front roller 4 is raised and returned to its old position.

(Effects of the Invention) In the present invention, the front roller is installed so that the starting point of contact between the endless belt and the side drum is above the falling point of the object to be polished. When the object to be polished moves upward and downward on the endless belt while being transferred, there is no tremor caused by being caught between the endless belt and the side drum. Even in such cases, jamming can be reliably prevented, and as a result, damage to the object to be polished can be prevented.

In addition, since the present invention provides the front roller to be movable up and down, by moving the front roller downward when discharging the object to be polished, the upward lifting angle of the endless belt by the front roller can be reduced. This has the effect that the article discharge port can be positioned at a lower position, and the article to be polished can be easily discharged.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram showing the vertical movement of the front roller, FIG. 2 is a schematic diagram showing the entire device of the present invention, and FIG. 3 is a schematic diagram showing the essentials of the device of the present invention. Part perspective view,
FIG. 4 is a schematic plan cross-sectional view showing a state in which the front roller and the auxiliary roller are connected. 4.Front roller 5.Endless belt 6.7.Side drum 8.Product to be polished hazy area P.Contact start point Q.Product to be polished falling point Fig. 1 Q: N CR frame item No. 4,000 I-See. Figure 2 Figure 4

Claims (1)

[Claims] An endless belt stretched between rollers is rotated and a side drum is rotatably provided on the endless belt to form a part to be polished, and the part to be polished placed on the endless belt is polished. In such a shot blasting device, the front roller is installed so that the point at which the endless belt and the side drum start contacting each other is located above the point at which the object to be polished is located, and the front roller can be moved up and down. A shot blasting device characterized by being installed in.