KR20230135883A - Apparatus for shot blasting - Google Patents

Abstract

A shot blasting apparatus is disclosed. According to an embodiment of the present invention, the shot blasting apparatus comprises: a device body; and a shot blasting unit provided in the device body, feeding polishing material to a polishing part so that the polishing material runs thereinto, thereby polishing the polishing part, and collecting the polishing material polishing the polishing unit. The shot blasting unit includes a feeding and collecting guide part including a feeding and collecting guide duct of which one side is open toward the polishing part and guides the polishing material so that the same is fed and collected. The feeding and collecting guide part includes: a first auxiliary guide connected to the feeding and collecting guide duct to extend from at least a portion of the open side of the feeding and collecting guide duct; and a second auxiliary guide rotatably provided on the first auxiliary guide to rotate to extend from a polishing part side of the first auxiliary guide, in response to the angle of the polishing part. Therefore, the angle of the side of the feeding and collecting guide part toward the polishing part can be adjusted.

Description

Shot blasting device {APPARATUS FOR SHOT BLASTING}

The present invention relates to a shot blasting device.

The shot blasting device projects an abrasive, such as grit, onto a polished area that requires surface treatment, such as a fillet weld, and causes the abrasive to collide with the polished area, allowing the polished area to be polished and surface treated by the abrasive. The abrasive material that polishes the polishing section is recovered by a shot blasting device and projected onto the polishing section again.

The shot blasting device has one side open to the polishing section and includes a projection count guide portion that guides the abrasive material being projected onto the polishing section and the abrasive material polished by the polishing section being recovered.

The projection frequency guide part of the conventional shot blasting device was unable to adjust the angle of one side open to the polishing part. Accordingly, in order to polish a polished part with various angles, such as a fillet weld, with an abrasive, there must be a plurality of projection frequency guide parts with different angles. Additionally, in order to polish a polished portion at a certain angle with an abrasive while polishing a polished portion at a different angle with an abrasive, it was cumbersome to replace the guide portion with a projection frequency guide portion with an angle corresponding to the angle. Additionally, if the polishing portion had multiple angles instead of just one angle, continuous polishing of the polishing portion with an abrasive was not possible because the projection frequency guide portion had to be replaced.

The present invention has been made in recognition of at least one of the above-mentioned needs or problems arising in the prior art.

One aspect of the object of the present invention is to adjust the angle of one side open to the polishing portion of the projection number guide portion of the shot blasting device, where one side is open to the polishing portion, so that the abrasive material is projected to the polishing portion and guides the recovery of the abrasive material polished by the polishing portion. To make it possible.

Another aspect of the purpose of the present invention is to enable polishing with an abrasive material on polishing parts having different angles without replacing the projection frequency guide part.

Another aspect of the purpose of the present invention is to enable continuous polishing with an abrasive on a polishing portion having various angles without replacing the projection frequency guide portion.

A shot blasting device related to one embodiment for realizing at least one of the above tasks may include the following features.

A shot blasting device according to an embodiment of the present invention includes a device body; and a shot blasting unit provided in the device body and configured to project and collide an abrasive material onto the polishing portion to polish the polishing portion and recover the polished abrasive material from the polishing portion. It includes, wherein the shot blasting unit includes a projection number guide part that is open on one side to the polishing unit and includes a projection number guide duct that guides the projection and recovery of the abrasive, and the projection number guide part is a projection number guide duct of the projection number guide duct. A first auxiliary guide connected to the projection frequency guide duct to extend from at least a portion of one open side, and rotatably provided on the first auxiliary guide, corresponding to the angle of the polishing portion, the polishing portion side of the first auxiliary guide It may further include a second auxiliary guide pivoted to extend from.

In this case, the device main body is movable, and the projection frequency guide part is provided on the bracket member so as to contact the bracket member provided on both sides of the second auxiliary guide, the magnet provided on the bracket member, and the polishing unit. The magnet may further include a guide roller spaced apart from the polishing unit by a predetermined gap.

Additionally, a reinforcing material may be provided on the abrasive projection side of the projection frequency guide duct, or at least a portion of the first auxiliary guide may be made of a reinforcing material.

And, at least a part of the first auxiliary guide and at least a part of the second auxiliary guide are spaced apart by a predetermined distance, so that a suction part connected to the outside is formed in at least a part between the first auxiliary guide and the second auxiliary guide. You can.

In addition, the shot blasting unit includes a hopper containing abrasives, an abrasive connected to the hopper and the abrasive projection side of the projection frequency guide duct so that the abrasive from the hopper is projected to the polishing unit through the projection side of the projection frequency guide duct. A projector, an abrasive recovery duct connected to the abrasive recovery side of the projection frequency guide duct and the hopper, and an air intake port connected to the hopper, so that the abrasive that polished the polishing portion is transmitted to the abrasive recovery side of the projection frequency guide duct and the recovery duct. It may further include a blower that allows the hopper to be recovered through the hopper.

As described above, according to the embodiment of the present invention, an angle on one side of the projection number guide portion of the shot blasting device is opened to the polishing portion to guide the abrasive being projected onto the polishing portion and recovering the abrasive material polished by the polishing portion. Adjustments may be possible.

Additionally, according to an embodiment of the present invention, polishing with an abrasive may be possible on polishing parts having different angles without replacing the projection frequency guide part.

Additionally, according to an embodiment of the present invention, continuous polishing with an abrasive may be possible for a polishing portion having various angles without replacing the projection frequency guide portion.

Figure 1 is a front perspective view of one embodiment of a shot blasting device according to the present invention.
Figure 2 is a rear perspective view of one embodiment of a shot blasting device according to the present invention.
Figure 3 is an exploded perspective view of one embodiment of the shot blasting device according to the present invention.
Figure 4 is an enlarged view of the projection number guide part of one embodiment of the shot blasting device according to the present invention of Figure 1.
Figure 5 is an exploded perspective view of the projection frequency guide portion of one embodiment of the shot blasting device according to the present invention.
Figures 6 to 8 are diagrams showing a state of use of an embodiment of the shot blasting device according to the present invention.

In order to facilitate understanding of the features of the present invention as described above, the shot blasting device related to the embodiment of the present invention will be described in more detail below.

The embodiments described below will be explained based on the embodiments most suitable for understanding the technical features of the present invention, and the technical features of the present invention are not limited by the described embodiments. This is to illustrate that the present invention can be implemented as in the embodiments. Accordingly, the present invention can be implemented in various modifications within the technical scope of the present invention through the embodiments described below, and these modified embodiments will be considered to fall within the technical scope of the present invention. In addition, in order to facilitate understanding of the embodiments described below, in the symbols shown in the accompanying drawings, related components among components that perform the same function in each embodiment are indicated by numbers on the same or extended lines.

Hereinafter, with reference to FIGS. 1 to 8, a shot blasting device according to the present invention will be described.

Figure 1 is a front perspective view of an embodiment of a shot blasting device according to the present invention, Figure 2 is a rear perspective view of an embodiment of a shot blasting device according to the present invention, and Figure 3 is an embodiment of a shot blasting device according to the present invention. This is an exploded perspective view.

In addition, Figure 4 is an enlarged view of the projection frequency guide portion of an embodiment of the shot blasting device according to the present invention in Figure 1, and Figure 5 is an exploded perspective view of the projection frequency guide portion of an embodiment of the shot blasting device according to the present invention.

And, Figures 6 to 8 are diagrams showing a state of use of an embodiment of the shot blasting device according to the present invention.

One embodiment of the shot blasting device 100 according to the present invention may include an device body 200 and a shot blasting unit 300, as shown in FIGS. 1 to 3.

The device body 200 is not particularly limited, and can be any known device as long as it can be equipped with the shot blasting unit 300.

The device body 200 may be movable. As a result, while the device body 200 moves along the polishing section GR, the polishing section GR can be polished with an abrasive material by the shot blasting unit 300 provided in the device body 200. In order to move the device body 200, the device body 200 may be provided with a rotatable wheel WH.

For example, the device body 200 may be rotatably provided with a total of three wheels WH, as shown in FIGS. 1 to 3 . In addition, among the three wheels (WH), one wheel (WH) is rotatably provided on one side of the device main body 200, and the remaining two wheels (WH) are rotatably provided on the other side of the device main body 200. It can be. However, the number of wheels (WH) rotatably provided on the device body 200 is not particularly limited, and any number is possible as long as the device body 200 can move.

In addition, as shown in Figures 1 to 3, the device body 200 includes two wheels (WH) connected to two wheels (WH) rotatably provided on the other side of the device body (200) among the three wheels (WH). A drive unit (WD) may be provided. The wheel drive unit (WD) may include a motor (MT) and a gearbox (GB) connected to the motor (MT) and two wheels (WH). And, the motor (MT) of the wheel drive unit (WD) may be connected to the control unit (CU) provided in the device main body 200. Accordingly, by driving the motor (MT) of the wheel drive unit (WD) by the control unit (CU), the two motors connected to the motor (MT) of the wheel drive unit (WD) by the gearbox (GB) The device body 200 can be moved by rotating the wheel WH.

Meanwhile, as shown in Figures 1 and 3, a wheel support member (WS) is connected to the abrasive projector 320, which will be described later, provided in the device body 200, and an auxiliary wheel (AW) is attached to the wheel support member WS. ) is rotatably connected, so that the device body 200 can be moved together with three wheels (WH) rotatably provided on the device body 200.

However, the configuration that allows the device main body 200 to move is not particularly limited, and any known configuration is possible as long as it allows the device main body 200 to move.

The shot blasting unit 300 may be provided in the device body 200. The shot blasting unit 300 may be configured to project and collide an abrasive material onto the polishing portion GR to polish the polishing portion GR and to recover the abrasive material polished from the polishing portion GR.

The abrasive material projected and recovered from the shot blasting unit 300 may be, for example, grit. However, the abrasive material projected and recovered from the shot blasting unit 300 is not particularly limited, and is projected from the shot blasting unit 300 and collides with the polishing portion GR to polish the polishing portion GR and the shot blasting unit 300. ), any known abrasive can be used as long as it can be recovered.

Additionally, the polishing portion GR polished with an abrasive may be, for example, a fillet weld portion as shown in FIGS. 6 to 8. However, the polishing portion GR polished by the abrasive is not particularly limited, and may be any location where the abrasive projected from the shot blasting unit 300 can collide and be polished.

As shown in FIGS. 1 to 3, the shot blasting unit 300 includes a hopper 310, an abrasive projector 320, an abrasive recovery duct 330, a blower 340, and a projection number guide unit 350. It can be included.

The hopper 310 may contain abrasives. The shape, size, or configuration of the hopper 310 is not particularly limited, and any shape, size, or configuration is possible as long as it can contain abrasives such as grit.

The abrasive projector 320 may be connected to the hopper 310. For example, as shown in FIGS. 1 to 3, the abrasive projector 320 may be connected to the abrasive discharge port (GO) at the bottom of the hopper 310 through a connector (CP). Accordingly, the abrasive contained in the hopper 310 can be supplied to the abrasive projector 320 by its own weight through the abrasive discharge port (GO) and the connection pipe (CP).

The abrasive projector 320 may also be connected to the abrasive projection side of the projection frequency guide duct 351, which will be described later, included in the projection frequency guide unit 350, as shown in FIGS. 1, 2, and 4. As a result, the abrasive supplied from the hopper 310 to the abrasive projector 320 passes through the projection side of the projection number guide duct 351 of the projection number guide section 350 by the abrasive material projector 320 to the polishing section ( GR).

For this purpose, the abrasive projector 320 includes, for example, as shown in Figures 1 to 3, a projection base body 321 connected to the projection number guide duct 351 of the projection number guide part 350, and a projection base body ( It may include a projection impeller 322 rotatably provided in the projection impeller 321, and a motor MT connected to the projection impeller 322 to rotate the projection impeller 322 and connected to the control unit CU. Accordingly, by driving the motor MT of the abrasive projector 320 by the control unit CU, the projection impeller 322 rotates, and the abrasive supplied from the hopper 310 is transferred to the projection number guide unit 350. ) can be projected onto the polishing unit GR through the projection side of the guide duct 351.

However, the configuration of the abrasive projector 320 is not particularly limited, and is connected to the hopper 310 and the projection side of the projection number guide duct 351 of the projection number guide part 350, so that the abrasive material supplied from the hopper 310 is Any known configuration is possible as long as it can be projected onto the polishing unit GR through the projection side of the projection number guide duct 351.

The abrasive recovery duct 330 may be connected to the abrasive recovery side of the projection water recovery guide duct 351 and the hopper 310. For example, the abrasive recovery duct 330 may be connected to the abrasive recovery side of the projection frequency guide duct 351 by a connection duct (CD) as shown in FIGS. 1, 2, and 4. Additionally, the abrasive recovery duct 330 may be connected to the abrasive inlet (GI) of the hopper 310 as shown in FIGS. 1 to 3.

As shown in FIGS. 1 to 3, the blower 340 may have an air intake port (AI) connected to the hopper 310. In addition, the blower 340 moves the abrasive material that has polished the polishing unit GR to the hopper 310 through the abrasive recovery side of the projection frequency guide duct 351 of the projection frequency number guide part 350 and the abrasive material recovery duct 330. It can be recovered.

As shown in Figures 1 to 3, the blower 340 includes a blower main body 341 provided with an air intake (AI) and an air outlet (AO), and blowing blades rotatably provided on the blower main body 341 ( (not shown) and a motor (MT) provided on the blower body 341 to be connected to the blowing blades and connected to the control unit (CU).

Then, when the motor MT of the blower 340 is driven by the control unit CU, the blower blades rotate in the blower main body 341, and the air from the polishing unit GR is sent to the projection frequency guide unit 350. After flowing through the abrasive recovery side of the projection water number guide duct 351 and the abrasive recovery duct 330, it may flow into the hopper 310 through the abrasive inlet (GI). The air flowing into the hopper 310 may flow into the blower main body 341 through the air intake port (AI) of the blower main body 341, then pass through the blower blades and be discharged to the outside through the air outlet (AO).

Accordingly, the abrasive material that collides with the polishing portion GR, polishes the polishing portion GR, and is reflected flows into the projection frequency guide portion 350 along the above-described air flow created by the blower 340, After flowing through the abrasive recovery side of the projection water collection guide duct 351 and the abrasive recovery duct 330, the abrasive may flow into the hopper 310 through the abrasive inlet (GI) and be recovered. Since the abrasive is heavier than air, the abrasive recovered to the hopper 310 does not flow into the blower main body 341 through the air inlet (AI) of the blower 340, but through the abrasive outlet (GO) of the hopper 310. It can be supplied to the abrasive projector 320 again.

In this case, an air discharge pipe (AP) is connected to the air outlet (AO) of the blower main body 341, as shown in Figures 2 and 3, to guide the discharge of air from the blower main body 341.

The projection frequency guide unit 350 may include a projection frequency guide duct 351 as shown in FIGS. 1 to 5 . The projection water collection guide duct 351 has one side open to the polishing unit GR and can guide the projection and recovery of the abrasive material.

For example, the projection frequency guide duct 351 may be formed by connecting two ducts so that one side is open, as shown in FIG. 5. And, one of the two ducts forming the projection frequency guide duct 351 may be connected to the projector body 321 of the abrasive projector 320 as shown in FIGS. 1 to 4. Additionally, the other of the two ducts forming the projection water recovery guide duct 351 may be connected to the abrasive recovery duct 330 through a connection duct (CD). As a result, the abrasive supplied from the hopper 310 to the abrasive projector 320 is transferred to the projection side of the projection number guide duct 351 by the abrasive material projector 320, for example, among the two ducts forming the projection number guide duct 351. It may be projected through a duct connected to the projection base body 321 of the abrasive projector 320 and projected onto the polishing unit GR through one open side of the projection number guide duct 351. In addition, the abrasive material that is projected and collides with the polishing unit GR to polish the polishing unit GR and is reflected passes through one open side of the projection frequency guide duct 351 to the recovery side of the projection frequency guide duct 351, for example. Among the two ducts forming the projection water recovery guide duct 351, the abrasive can be recovered through the duct connected to the abrasive recovery duct 330.

However, the configuration of the projection water collection guide duct 351 is not particularly limited, and any known configuration is possible as long as one side is open to the polishing unit GR and can guide the projection and recovery of the abrasive material.

Meanwhile, as shown in FIGS. 1 and 3 to 5, a reinforcing material (SF) may be provided on the abrasive projection side of the projection frequency guide duct 351. As a result, when the abrasive is projected onto the polishing unit GR through the projection frequency guide duct 351, the projection frequency guide duct 351 can be prevented from being worn out due to collision with the abrasive.

As shown in FIGS. 1 to 5, the projection coefficient guide unit 350 may further include a first auxiliary guide 352 and a second auxiliary guide 353.

The first auxiliary guide 352 may be connected to the projection frequency guide duct 351 to extend from at least a portion of one open side of the projection frequency guide duct 351. For example, the first auxiliary guide 352 is connected to the upper part and both sides of the open side of the projection frequency guide duct 351, respectively, so as to extend from the upper part and both sides of the open side of the projection frequency guide duct 351. You can. For this purpose, the first auxiliary guide 352 is connected to each other as shown in FIG. 5, and has one upper extension member (UM) connected to the upper part and both sides of the open side of the projection frequency guide duct 351. ) and may include two side extension members (SM). However, the configuration of the first auxiliary guide 352 is not particularly limited, and any configuration may be provided as long as it can be connected to the projection frequency guide duct 351 so as to extend from at least a portion of the open side of the projection frequency guide duct 351. It is even possible. In addition, the portion of the open side of the projection frequency guide duct 351 to which the first auxiliary guide 352 is connected and extended is not particularly limited, and any portion of the open side of the projection frequency guide duct 351 may be used. .

Meanwhile, at least a portion of the first auxiliary guide 352 may be made of reinforcing material (SF). Accordingly, it is possible to prevent the first auxiliary guide 352 from being worn out by collision with the abrasive when projecting or recovering the abrasive. For example, as shown in Figure 5, among the two side extension members (SM) of the first auxiliary guide 352, the side extension member (SM) close to the recovery side of the projection number guide duct 351 has a reinforcement (SF). ) can be. However, the part of the first auxiliary guide 352 that is the reinforcing material (SF) is not particularly limited, as long as it is a part that can prevent the first auxiliary guide 352 from being worn by collision with the abrasive during projection or recovery of the abrasive. , any part of the first auxiliary guide 352 is possible.

The second auxiliary guide 353 may be rotatably provided on the first auxiliary guide 352. As a result, as shown in FIGS. 6 to 8, the second auxiliary guide 353 can pivot from the first auxiliary guide 352 to extend from the polishing portion side of the first auxiliary guide 352.

Accordingly, it may be possible to adjust the angle of one side open to the polishing portion GR of the projection frequency guide portion 350, so that the polishing portion of the projection frequency guide portion 350 corresponds to the angle of the polishing portion GR. (GR) allows you to adjust the angle of one open side.

Accordingly, without replacing the projection number guide part 350 of the shot blasting device 100, polishing with an abrasive material of the polishing part GR having different angles can be performed using one projection number guide part 350. It may be possible. In addition, without replacing the projection frequency guide unit 350, the shot blasting device 100 can continuously polish the polishing unit GR having various angles with an abrasive.

For example, as shown in FIG. 5, the second auxiliary guide 353 is at least a portion of the polishing portion side of the first auxiliary guide 352, for example, a portion of the upper portion and both sides of the first auxiliary guide 352 on the polishing portion side. It may be in the shape of a cover that can surround. In addition, arc-shaped swing guide holes (SH) are formed on both sides of the second auxiliary guide 353, and the first auxiliary guide 352 has a swing guide rod (SR) that passes through the swing guide hole (SH). Thus, the second auxiliary guide 353 can be rotatably provided on the first auxiliary guide 352. However, the shape of the second auxiliary guide 353 and the configuration in which the second auxiliary guide 353 is rotatably provided on the first auxiliary guide 352 are not particularly limited, and the polishing of the first auxiliary guide 352 Any shape or configuration is possible as long as it can be rotatably provided on the first auxiliary guide 352 to extend from the auxiliary side.

As shown in Figures 1 and 3 to 5, a discharge prevention member (DP) may be provided around the polishing part side of the second auxiliary guide 353. Accordingly, as shown in FIGS. 6 to 8, the portion between the polishing portion side of the second auxiliary guide 353 and the polishing portion GR may be covered by the emission prevention member DP. As a result, when the abrasive is projected or recovered by the shot blasting unit 300, the abrasive can be prevented from being released to the outside through the portion between the polishing portion side of the second auxiliary guide 353 and the polishing portion GR. .

The emission prevention member (DP) may be made of, for example, a brush or rubber. However, the emission prevention member (DP) is not particularly limited, and is provided around the polishing portion side of the second auxiliary guide 353, forming a portion between the polishing portion side of the second auxiliary guide 353 and the polishing portion GR. As long as it can be covered, anything well-known is possible.

Meanwhile, at least a part of the first auxiliary guide 352 and at least a part of the second auxiliary guide 353 are spaced apart by a predetermined distance, as shown in Figure 4, so that the first auxiliary guide 352 and the second auxiliary guide ( 353), a suction portion (SC) connected to the outside may be formed in at least a portion of the space. As a result, the intake of air from the polishing unit GR through the abrasive recovery side of the projection frequency guide duct 351, the abrasive recovery duct 330, and the hopper 310 by the blower 340 can be achieved more smoothly. You can.

The projection coefficient guide unit 350 may further include a bracket member 354, a magnet 355, and a guide roller 356, as shown in FIGS. 1 to 5.

Bracket members 354 may be provided on both sides of the second auxiliary guide 353, respectively. The shape and configuration of the bracket member 354 is not particularly limited, and is provided on both sides of the second auxiliary guide 353, as long as it has a shape and configuration that can be provided with a magnet 355 and a guide roller 356. Any shape or composition is possible.

The magnet 355 may be provided on the bracket member 354. The configuration in which the magnet 355 is provided in the bracket member 354 is not particularly limited, and any known configuration is possible, such as being provided with a bolt (not shown) or the like.

The guide roller 356 is provided on the bracket member 354 to contact the polishing portion GR, and as shown in FIGS. 6 to 8, the magnet 355 is maintained at a predetermined gap GP from the polishing portion GR. It can be separated. Accordingly, although the magnetic force of the magnet 355 acts on the polishing portion GR, it is possible to prevent the magnet 355 from being attached to the polishing portion GR by magnetic force. As a result, while the device body 200 moves along the polishing section GR, even if the abrasive material continues to be projected and collides with the polishing section GR by the shot blasting unit 300, the movement of the device body 200 is prevented. It is not affected by this and can move stably along the polishing section GR.

The guide roller 356 is rotatably provided on the bracket member 354 and can guide the movement of the device body 200 along the polishing portion GR.

As described above, when the shot blasting device according to the present invention is used, the projection number guide portion of the shot blasting device is opened to the polishing portion, which guides recovery of the abrasive material that is opened to the polishing portion and the abrasive is projected to the polishing portion and polished by the polishing portion. Angle adjustment on one side may be possible, and polishing with an abrasive may be possible for abrasive parts having different angles without replacing the projection frequency guide part, and polishing with an abrasive material may be possible for abrasive parts with various angles without replacing the projection frequency guide part. Continuous polishing may be possible.

The shot blasting device described above is not limited to the configuration of the above-described embodiments, and the above embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made. .

100: Shot blasting device 200: Device body
300: Shot blasting unit 310: Hopper
320: Abrasive projector 321: Projection base body
322: projection impeller 330: abrasive recovery duct
340: blower 341: blower body
350: Projection frequency guide unit 351: Projection frequency guide duct
352: 1st auxiliary guide 353: 2nd auxiliary guide
354: Bracket member 355: Magnet
356: Guide roller GR: Polishing part
GP: gap SF: reinforcement
SC: Suction part WH: Wheel
WD: Wheel drive unit MT: Motor
GB: Gearbox CU: Control unit
WS: Wheel support member AW: Auxiliary wheel
CP: Connector GI: Abrasive inlet
GO: Abrasive outlet CD: Connection duct
AI: Air intake AO: Air outlet
AP: Air discharge pipe SH: Swivel guide hole
SR: Swivel guide rod UM: Upper extension member
SM: Side extension member DP: Discharge prevention member

Claims (5)

device body; and
a shot blasting unit provided in the device main body and configured to project and collide an abrasive material onto the polishing portion to polish the polishing portion and recover the polished abrasive material from the polishing portion; Includes,
The shot blasting unit includes a projection number guide portion that is open on one side to the polishing section and includes a projection number guide duct that guides the projection and recovery of the abrasive material,
The projection frequency guide part includes a first auxiliary guide connected to the projection frequency guide duct so as to extend from at least a portion of an open side of the projection frequency guide duct, and is rotatably provided on the first auxiliary guide to adjust the angle of the polishing portion. Correspondingly, the shot blasting device further includes a second auxiliary guide pivoted to extend from the polishing portion side of the first auxiliary guide. According to paragraph 1,
The device body is movable,
The projection frequency guide unit is provided on a bracket member provided on both sides of the second auxiliary guide, a magnet provided on the bracket member, and the bracket member so as to contact the polishing unit so that the magnet is spaced a predetermined gap from the polishing unit. A shot blasting device further comprising a guide roller. According to paragraph 1,
A shot blasting device in which a reinforcing material is provided on the abrasive projection side of the projection frequency guide duct, or at least a portion of the first auxiliary guide is made of a reinforcing material. According to paragraph 1,
At least a portion of the first auxiliary guide and at least a portion of the second auxiliary guide are spaced apart by a predetermined distance, and a suction portion connected to the outside is formed in at least a portion between the first auxiliary guide and the second auxiliary guide. Device. According to paragraph 1,
The shot blasting unit includes a hopper containing abrasives, an abrasive projector connected to the hopper and the abrasive projection side of the projection number guide duct so that the abrasives in the hopper are projected onto the polishing unit through the projection side of the projection number guide duct, An abrasive recovery duct connected to the abrasive recovery side of the projection frequency guide duct and the hopper, and an air intake port are connected to the hopper, so that the abrasive that polishes the polishing part passes through the abrasive recovery side of the projection frequency guide duct and the recovery duct. A shot blasting device further comprising a blower for recovery into the hopper.

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