JPH035424Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a sandblasting device for small articles, which is suitable for sandblasting small articles, particularly minute articles of several mm or less.

[Prior Art] Sandblasting devices have been provided in various markets.

As shown in FIG. 8, the most commonly used sandblasting device has an upper surface 37 bent into a substantially curved L-shape through a rotary wheel 32 so as to form an endless belt-like chair-like structure. A product rolling belt 31 that circulates and rotates while maintaining its state, and a product rolling belt 31 disposed above the product rolling belt 31.
and an abrasive jetting nozzle 34 that sprays an abrasive material 33 toward the upper surface of the abrasive material. The product rolling belt 31 is made of, for example, rubber band and has a large number of through holes 35 with a small diameter of about 3 mm, and a small article 36 is placed on the product rolling belt 31. The upper surface 37 of the rolling belt 31 is formed so as to be rotated cyclically upward in a curved L-shape.

Then, the small articles 3 on the product rolling belt 31
6 is moved upward by the circular rotation of the product rolling belt 31, but as it moves upward, the slope becomes steeper, so the small article 36 rotates as if rolling down. . As a result, the small article 36 rotates freely while the abrasive material 33
Since the abrasive material 33 is sprayed evenly over the surface of the small article 36, a sandblasting finish can be applied. And small items 3
The abrasive material 33 sprayed onto the abrasive material 6 falls downward from the small-diameter through hole 35 of the product rolling belt 31, is collected by an abrasive material collection hopper 38, and is sent to an abrasive material supply tank 39 through a pipe 40, where the abrasive material 33 is It is designed to be used by circulating it.

However, when using this device to sandblast a small article 36 with a size of 3 mm or less, the small article 36 falls from the small diameter through hole 35 together with the abrasive material 33, making it impossible to apply sandblasting finish. , since small articles 36 are mixed into the abrasive material 33, the piping 40 and the jet nozzle 3 are
4, which often had an adverse effect on the operation of the device.

Therefore, as shown in FIGS. 9 and 10, the product rolling belt 31 is placed between two endless chains 41 arranged in parallel, instead of using a band-shaped rubber belt as described above. A plate 43 is installed at the upper end of each inner plate 42 for each frame of 41, and the interval between the plates 43 is made very narrow so that the small article 36 will not fall between the plates 43 and the abrasive material will not fall. A device was devised that would allow only 33 to fall.

[Problems to be Solved by the Invention] However, with this product rolling belt 31, there is no problem when the endless chain 41 extends in a straight line, but when the endless chain 41 is bent inward and recessed, the plate 43 The distance between the plates 43 becomes narrower, and when the plates 43 are curved so as to protrude outward, the distance between the plates 43 becomes wider, resulting in an irregularity.
Therefore, if the width when the interval between the plates 43 is narrowed is set to a width suitable for sandblasting processing of minute small articles 36, the endless chain 41 will be in a straight line or curved so as to bulge outward. When this state is reached, the interval between the plates 43 becomes wider than the appropriate width, and minute objects 36 are dropped through the gap.
often falls down. Moreover, this time, contrary to the above, if the interval between the plates 43 when the endless chain 41 is in the outwardly curved state is set to the suitable width, the endless chain 41
When the plates 43 are inwardly curved and recessed, the plates 43 come too close to each other and come into contact with each other, which has an adverse effect on the circulation rotation of the endless chain 41. In other words, when such a narrow plate 43 is used, it is not possible to obtain an appropriate distance between the plates 43, so it is not suitable for sandblasting of minute articles 36.

Therefore, this invention was devised for the purpose of improving the above-mentioned device having a product rolling belt and making it suitable for sandblasting of small, minute articles.

[Means for Solving the Problems] This invention is based on the idea that an endless belt-shaped product rolling belt is passed through a rotary wheel so that the upper surface is curved L so that it becomes chair-like.
Circulate and rotate while maintaining the bent shape,
In sandblasting equipment, which finishes the product by placing the product on the top surface of the product rolling belt and spraying an abrasive material made of fine particles from above, the product rolling belt is placed on two endless endless belts arranged in parallel. A narrow carrier plate is installed between the chains for each frame of the endless chain. the bottom of the long side,
The above-mentioned problems are solved by arranging the centers of the connecting pins that connect each piece of the endless chain to each other, and by arranging them so as to face the outside of the ring that goes around the endless chain. It is something to do.

[Embodiment] An embodiment of this invention will be described below with reference to the drawings.

That is, the reference numeral 1 shown in the figure is a sandblasting device, which includes a sealed case 3 having an abrasive collecting hopper 2 at the bottom, a product rolling belt 4, and an abrasive material 6 from an abrasive supply tank 5 to the product rolling belt 4. A jet nozzle 8 that sprays the jet toward the upper surface 7 of the
It consists of. Further, the abrasive material 6 collected in the abrasive material collection hopper 2 is sent to the abrasive material supply tank 5 through a pipe 9, and from the abrasive material supply tank 5 to the jet nozzle 8 through a pipe 10. , so that compressed air from the air pipe 11 is ejected from the ejection nozzle 8.

The product rolling belt 4 is shaped like a chair so that it circulates and rotates via the rotary wheel 12 while keeping the upper surface 7 bent in a substantially curved L-shape.

The product rolling belt 4 has a structure in which a carrier plate 14 is installed between two endless chains 13 arranged in parallel. This carrier plate 14
As shown in FIG. 5, it is made of a soft elastic material such as rubber and has a core bar 15 built therein, and is formed of a narrow plate having a trapezoidal cross-section. and,
As shown in FIG. 3, this carrier plate 14 is installed on an endless chain 13 in which a mounting piece 17 is bent in an L-shape and extends from the inner plate 16 of each frame, and as shown in FIG. As shown in FIG. 2, the long bottom 18 of the trapezoid is connected to the endless chain 13.
The short bottom 20 is placed on the line connecting the centers of the respective connecting pins 19 that connect the pieces.
are brought into contact with the mounting pieces 17 and fixed with screws 21 or the like. Moreover, carrier plate 14
The longer bottom 18 of the endless chain 13 is arranged so as to face the outside of the endless ring that goes around once.

As shown in FIG. 1, the product rolling belt 4 formed in the shape of an endless belt in this way has two sets of three sprocket gears 22 and one rotary wheel 12 arranged in two endless belts. The chain 13 is formed to be able to bend and rotate. The three sprocket gears 22 are located inside the endless chain 13.
One rotary wheel 12 is arranged at approximately the middle portion of the upper surface 7 of the endless chain 13, and is bent into a generally curved L shape, so that it looks like a chair when viewed as a whole. In this case, the rotary wheel 12 is also shaped like a sprocket gear.

Moreover, the distance between the carrier plates 14 varies depending on the size of the small article 23 to be sandblasted, but usually the long bottom 1
The width of the carrier plate 14, the size of the endless chain 13, etc. are appropriately set so that the distance between the two ends is about 0.4 mm.

Next, its use is as follows.

First, a small article 23 of, for example, about 1 mm in size is placed on the upper surface 7 of the product rolling belt 4, and the product rolling belt 4 is rotated in a circular manner so that the upper surface 7 faces upward in a chair-like manner. . Then, the abrasive material 6 is sprayed toward the upper surface 7 from the jet nozzle 8 .

Then, the small article 23 on the upper surface 7 moves upward due to the circular rotation of the product rolling belt 4, but the small article 23 becomes tighter as the slope of the product rolling belt 4 goes upward. As it grows, it rolls down and rotates on the top surface 7. Therefore,
Since the abrasive material 6 is sprayed toward the upper surface 7 by the jet nozzle 8, the sandblasting process is completed in which the abrasive material 6 is evenly sprayed onto the small article 23.

At this time, if the distance between the longer bottoms 18 of the carrier plates 14 is set to about 0.4 mm as described above, only the abrasive material 6 will fall downward from this gap and will be stored in the abrasive material collection hopper 2, while the small articles 23 will be placed on the upper surface. It remains placed at 7. The distance between the longer bottoms 18 may be set to such an extent that the small article 23 does not pass through, but it may be set to 0 if necessary.

This is because the cross section of the carrier plate 14 is trapezoidal, the longer bottom 18 of the carrier plate 14 is arranged on a line connecting the centers of the connecting pins 19, and the longer bottom 18 is directed toward the outside of the ring of the endless chain 13. Therefore, as shown in FIGS. 6 and 7, even if the product rolling belt 4 curves inward or outward, there will be no change in the lengthwise distance of the endless chain 13 on the line. Therefore, the distance between the longer bottoms 18 is constant, and even if the distance is made very small, the movement of the product rolling belt 4 will not be adversely affected. Even if the longer bottoms 18 are brought into contact with each other with a distance of 0, the carrier plate 14 may be bent between the two endless chains 13 because the carrier plate 14 is made of a soft elastic material with a metal core. There is almost no damage to the carrier plate 14 since it is soft. Moreover, since the cross section of the carrier plate 14 is trapezoidal, even if the product rolling belt 4 curves outward, the short bottoms 20 do not come into contact with each other, allowing smooth circulation rotation of the product rolling belt 4. can be obtained. Note that the cross section of the carrier plate 14 does not have to be trapezoidal, but may have a shape such that the width is narrower on the side facing the surface disposed on the line connecting the centers of the connecting pins 19 to provide relief. It can be of any shape.

The small articles 23 that have been sandblasted in this manner are moved downward by reversing the product rolling belt 4 and are discharged from the discharge hopper 24.

[Effects of the invention] In this invention configured as described above, the endless belt-shaped product rolling belt 4 is connected to the rotary wheel 1 in a chair-like manner.
2, the product is placed on the top surface 7 of the product rolling belt 4, and the abrasive material 6 made of fine particles is applied from above. In a sandblasting device 1 that performs finishing processing by spraying, a product rolling belt 4
A narrow carrier plate 14 is placed between two endless chains 13 arranged in parallel.
Since the product rolling belt 4 of the plate conveyor type is formed, the abrasive material can be removed from the gaps between the carrier plates 14 without having to drill many small holes in the carrier plates 14. 6
Sandblasting can be performed by dropping the material downward.

The carrier plate 14 has a substantially trapezoidal cross-sectional shape and is made of a soft elastic material with a built-in core metal 15. The carrier plate 14 is installed between the endless chains 13 because the centers of the connecting pins 19 are arranged on a line that connects them, and they are arranged so as to face the outside of the ring that goes around the endless chain 13. Even if the carrier plates 14 are made of a soft elastic material, they will not be damaged or deformed even if the carrier plates 14 come into contact with each other.

Moreover, since the longer bottom 18 is arranged on the line connecting the centers of the connecting pins 19, even if the product rolling belt 4 curves inward or outward, the longer bottom 18
The interval between them is constant, and the cross section of the carrier plate 14 is approximately trapezoidal, and the longer bottom 18 is arranged so as to face the outside of the ring of the endless chain 13. Even if the short bottoms 20 are designed to escape and the distance between the long bottoms 18 is very narrow, for example 0.4 mm or less, there will be no adverse effect on the circulation rotation of the product rolling belt 4. do not have. Therefore, even if the size of the small article 23 is, for example, about 1 mm or smaller, it will not fall downward from the gap between the carrier plates 14, and only the abrasive material 6 will fall downward. Therefore, the small article 23 and the abrasive material 6 can be easily separated. As a result, the small articles 23 can be sandblasted without getting mixed into the abrasive material 6 and clogging the ejection nozzle 8 or the like.

In this way, according to this invention, it is possible to easily perform sandblasting on minute objects, which was almost impossible in the past, and the structure is simple, making it possible to improve the conventional sandblasting equipment at low cost. Since it can be carried out by simply doing the following, it has practical effects such as cost reduction.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of this invention, with Figure 1 being a front sectional view, Figure 2 being a partially cutaway perspective view of a product rolling belt, and Figure 3 being a chain. 4 is an enlarged sectional view taken along the - arrow line in FIG. 2, and FIGS. 5 to 7 are enlarged sectional views of each aspect of the product rolling belt,
Figure 8 is a front sectional view of a conventional sandblasting device.
FIG. 9 is a partially cutaway perspective view of the product rolling belt, and FIG. 10 is an enlarged sectional view taken along the - arrow in FIG. 1... Sandblasting device, 2... Abrasive material collection hopper, 3... Sealed case, 4... Product rolling belt, 5... Abrasive supply tank, 6... Abrasive material,
7...Top surface, 8...Blowout nozzle, 9...Piping, 1
0... Piping, 11... Air piping, 12... Rotating wheel, 13... Endless chain, 14... Carrier plate, 15... Core metal, 16... Inner plate,
17...Mounting piece, 18...Longer bottom, 19...
Connecting pin, 20...bottom of the short side, 21...screw,
22...Sprocket gear, 23...Small items, 2
4...Discharge hopper, 31...Product rolling belt,
32...Rotating wheel, 33...Abrasive material, 34...Ejection nozzle, 35...Small diameter through hole, 36...Small article,
37... Upper surface, 38... Abrasive material collection hopper, 3
9...Abrasive supply tank, 40...Piping, 41...
...Endless chain, 42...Inner plate, 43...
...board.

Claims (1)

[Scope of utility model registration request] An endless belt-shaped product rolling belt is circulated and rotated through a rotary wheel so as to form a chair-like shape while the top surface is bent into a substantially curved L-shape, and a product is placed on the top surface of the product rolling belt. In sandblasting equipment, which performs finishing by spraying microscopic abrasive material from above, the product rolling belt is placed between two endless chains arranged in parallel, and a narrow carrier plate is connected to the endless chain. The carrier plate has a substantially trapezoidal cross-sectional shape and is made of a soft elastic material with a built-in core metal, and the long bottom of the trapezoid is connected to each frame of the endless chain. A sandblasting device for small articles, characterized in that the centers of the respective connecting pins connecting the two are arranged on a line connecting the two, and are arranged so as to face the outside of one ring of an endless chain.