JP2014042976A - Blast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blast device using a DD motor attached to an outer wall surface of a dusty blast chamber as a driving source of a nozzle.SOLUTION: A blast device 10 includes a nozzle holder 30 which is inserted into a through-hole 20b of a DD motor 20 mounted on an outer wall surface of a blast chamber 14, rotates according to rotation of a rotary drive section 20e and includes a projection material passage 30a passing through along a major axis. In the nozzle holder 30, a rear end of a first nozzle 24 is inserted into a nozzle insertion section 30b projecting from one end side of a DD motor 20, and a supply hose 26 is connected to a connection tool mounting section 30d projecting from the other end side of the DD motor 20 at the other end of the nozzle holder 30 via a hose joint 28. In the blast device 10, a lid body 38 is attached to one end side of a cylindrical casing 20a including the rotary drive section 20e, and a seal socket 48 internally inserted with a seal member 40b is externally inserted into a connection portion between the connection tool mounting section 30d and the hose joint 28.

Description

  The present invention relates to a blasting apparatus that performs blasting by injecting a mixed projection material and compressed air supplied from a supply hose onto a workpiece in a blasting chamber.

  A blasting apparatus that peels and removes core sand in a hole of a workpiece such as a cast product is described in Patent Document 1 below. This blasting device has a lifting device mounted on a horizontal movement device arranged in a blasting chamber, and is mounted on a motor mounted on a holding frame body that is movable in the vertical direction on the lifting device on the side surface of the tip. A long nozzle having an injection port opened is rotatably attached. The motor and the nozzle are connected to the rotation drive unit of the motor via a gear. According to this blasting device, the nozzle is moved above the hole in the workpiece by the moving device, and the nozzle moving up and down in the hole by the lifting device is rotated by the motor, while the projection material is blown together with the compressed air from the injection port. The core sand in the hole can be peeled and removed. Japanese Patent Application Laid-Open No. H10-228561 describes that a polishing nozzle is attached to the arm of an articulated robot.

JP 2004-106092 A JP-A-11-207630

When the inventor peels and removes the core sand in the hole of the workpiece, the core sand does not remain evenly on the inner wall surface of the hole, and the core sand is placed at a predetermined location depending on the shape of the hole. It has remained, and it was found that it can be easily peeled off by spraying the projection material with compressed air at that location. For this reason, an attempt was made to use a direct drive motor capable of accurately adjusting the rotation angle of the nozzle as the nozzle drive source. However, even when the direct drive motor is provided on the outer wall surface side where the dust density is lower than that of the blast chamber, it has been found that the bearings built in the direct drive motor are easily damaged by the floating dust.
Accordingly, an object of the present invention is to provide a blasting device using a direct drive motor mounted on the outer wall surface side of a blasting chamber in which dust is floating as a nozzle driving source.

  The present invention provides a blasting process in which a mixed projection material and compressed air supplied from a supply hose are jetted onto a workpiece movable in a vertical direction and a horizontal direction by moving means provided in a blast chamber. It is an apparatus, is attached to the outer wall surface of the blast chamber, and is attached to the outer wall surface of the blast chamber, along the central axis of the cylindrical casing. The first fixed portion and the second fixed portion that form both ends of the cylindrical casing, and the rotational drive that rotates along the opening edge of the through hole of the first fixed portion. A direct drive motor including a portion, and the projection material and the compressed air formed along the long axis of the insertion portion that is connected to the rotation drive portion of the direct drive motor and inserted into the through hole. And a nozzle that is inserted into the blast chamber through the first fixed portion and the wall and is inserted into the blast chamber and connected to one end of the projection material passage. A nozzle holder provided with an insertion portion and a connecting device mounting portion that protrudes from the second fixing portion and is connected to the supply hose on the other end side of the projection material passage, and rotates together with the nozzle holder And a sealing socket that is extrapolated to the connector mounting portion and covers a connection portion with the connector, so as to cover the first fixed portion side including the rotation drive portion of the direct drive motor. The nozzle insertion portion is rotatably inserted into the opening of the lid attached to the first fixing portion, and the gap between the opening of the lid and the nozzle insertion portion, the seal socket, and the connection Gap between ingredients Each sealing member of a blasting apparatus, characterized in that is inserted.

  In the present invention, the connector penetrates the hook-shaped portion fixed to the fixed base fixed to the second fixed portion of the direct drive motor via a predetermined space, and the cylindrical portion is formed from each surface thereof. Is a hose joint in which one end portion of the cylindrical portion is inserted into a connector mounting portion of the nozzle holder, and the supply hose is inserted into the other cylindrical portion, and the hose joint A seal member is inserted into a gap between one outer peripheral surface of the cylindrical portion and an inner wall surface of the seal socket portion extending so as to cover the outer peripheral surface, thereby providing a supply hose and a hose joint. Can be reliably separated from the direct drive motor. For this reason, even if the projection material or the like leaks from the connecting portion, the projection material or the like only leaks into the blast chamber, and can be prevented from entering the direct drive motor. Moreover, generation | occurrence | production of the dust from the clearance gap between the seal socket which is a rotation member, and the hose joint which is a fixing member can also be prevented.

  It is preferable that the hook-shaped portion of the hose joint is supported by a support body standing on a fixed base mounted on the second fixed portion of the direct drive motor.

  By inserting a seal member into a concave groove provided around the outer peripheral surface of the insertion portion of the nozzle holder inserted into the through hole of the direct drive motor, the inner wall of the through hole and the outer peripheral surface of the nozzle holder are Dust that enters the first fixed portion side of the direct drive motor via the gap can be reliably prevented. Further, the seal member can be securely attached to a predetermined location on the outer peripheral surface of the insertion portion of the nozzle holder.

  A flange provided around the outer peripheral surface of the nozzle insertion portion of the nozzle holder is connected to a rotation base attached to the rotation drive portion of the direct drive motor attached to the outer wall surface of the wall via a bracket. A space is formed between the rotating base and the lid, so that the flange of the nozzle holder can be easily attached to the rotation drive part of the direct drive motor, and the lid is removed and rotated. By observing the surface of the base, it is possible to determine whether dust can enter the lid, and it is possible to easily determine whether the seal member or the like can be replaced.

  By inserting a seal member into the gap between the rotating base and the bracket, it is possible to further prevent dust from entering the first fixed portion.

  When the moving means is an arm of an articulated robot disposed in the blast chamber, the projection material and the compressed air can be injected from the first nozzle to an arbitrary position of the workpiece.

  On the inner wall surface of the blast chamber, a long second nozzle having a nozzle opening at the tip is mounted at a position different from the mounting position of the first nozzle. By projecting the projection material and compressed air in the nozzle extension direction, the projection material and compressed air can be ejected from two types of nozzles onto the workpiece, and the workpiece is blasted using the optimum nozzle. Processing can be performed.

  The blasting apparatus of the present invention includes a mixed projection material as a member that transmits a rotational force of a direct drive motor (hereinafter referred to as a DD motor) to a first nozzle that injects the projection material together with compressed air onto a workpiece. A nozzle holder with a compressed air projecting material passage is used. The nozzle holder is inserted into the through hole of the DD motor, and both end portions thereof protrude from the first fixing portion and the second fixing portion that form both end portions of the DD motor. The other end portion of the nozzle holder that protrudes from the second fixed portion and that protrudes from the second fixed portion into the nozzle insertion portion that is one end portion of the nozzle holder that protrudes from the first fixed portion and is inserted into the blast chamber. It connects with a supply hose via a connector to a connector mounting part. In addition, a seal socket is extrapolated to the connection tool mounting part so as to cover the connection part between the connection tool mounting part and the connection tool of the nozzle holder, and the first fixed part side including the rotation drive part of the DD motor is covered with a lid. ing. Further, a seal member is inserted into each of the gap between the seal socket and the connection tool and the gap between the nozzle insertion portion and the opening of the lid. Thus, sufficient dust-proof measures are taken at both ends of the DD motor.

  The DD motor with such dust-proof measures can prevent the bearing built in the DD motor from being damaged by dust even if it is mounted on the outer wall surface of the blast chamber where dust is floating. It can be used as a rotational drive source for the first nozzle that injects the projection material together with the compressed air. Further, the driving force of the DD motor can be directly transmitted to the first nozzle without using a gear or the like, and the rotation angle of the first nozzle can be adjusted with high accuracy. Furthermore, the DD motor is lighter than a motor using gears or the like, and can reduce the wall of the blast chamber.

It is a front view which shows an example of the blasting apparatus which concerns on this invention. It is a fragmentary sectional view which shows the connection state of a DD motor, a 1st nozzle, and a supply hose. It is a perspective view of a DD motor. It is a fragmentary sectional view of a nozzle holder. It is a fragmentary sectional view which shows the connection state of a 2nd nozzle and a supply hose. It is a fragmentary sectional view which shows the condition which blasts to a to-be-processed object using a 1st nozzle and a 2nd nozzle.

  Hereinafter, although the form for implementing this invention is demonstrated in detail, the scope of the present invention is not limited to these forms.

  An example of a blasting apparatus according to the present invention is shown in FIG. In the blasting apparatus 10 shown in FIG. 1, an arm 18 of an articulated robot 16 as a means for moving a workpiece 60 is inserted into a blast chamber 14 partially partitioned by a curtain 12. The DD motor 20 is mounted on the outer wall surface of the ceiling portion of the wall 22 made of a metal plate or a resin plate forming the blast chamber 14. The DD motor 20 is provided with a first nozzle 24 inserted into the blast chamber 14 so that a projection material can be injected together with compressed air onto the workpiece 60 chucked by the arm 18, and a supply hose 26. The mixed projection material and compressed air are supplied. The first nozzle 24 is a long nozzle made of metal or ceramic. Further, a long second nozzle 50 made of metal or ceramic inserted through the wall 22 and inserted into the blast chamber 14 is provided at the ceiling portion wall 22 at a predetermined distance from the first nozzle 24. ing. The second nozzle 50 is also supplied with the mixed projection material and compressed air from the supply hose 52. Each of the supply hoses 26 and 52 is connected to a projection material tank (not shown) in which the projection material is stored and a compressed air tank (not shown).

  The DD motor 20 attached to the outer wall surface of the ceiling wall 22 shown in FIG. 1 is attached to the wall 22 via a bracket 21 as shown in FIG. As shown in FIG. 2, the DD motor 20 has a supply hose 26 and a first nozzle 24 connected to each other via a nozzle holder 30 penetrating the center portion thereof. As shown in FIG. 3, the DD motor 20 includes a first fixing portion 20c and a second fixing portion in which through holes 20b penetrating along the central axis of the cylindrical casing 20a form both end portions of the cylindrical casing 20a. It is opened to 20d. Further, the first fixing portion 20c is provided with a rotation driving portion 20e that rotates in the direction of arrow B along the opening edge of the through hole 20b. A plurality of bolt holes 20f connected to other members are formed in the first fixing portion 20c, the second fixing portion 20d, and the rotation driving portion 20e (FIG. 3 shows bolts of the second fixing portion 20d. The hole 20f was omitted).

  The nozzle holder 30 inserted into the through hole 20b of the DD motor 20 is shown in FIG. The nozzle holder 30 is formed with a projection material passage 30a through which the mixed projection material and compressed air pass along the central axis. One end portion of the nozzle holder 30 is formed in a nozzle insertion portion 30b into which the rear end portion of the first nozzle 24 is inserted. The nozzle insertion portion 30b is formed with a hollow portion 30c connected to one end of the projection material passage 30a. The hollow portion 30 c has a tapered shape whose inner diameter gradually increases in the direction of one end of the nozzle holder 30. The other end portion of the nozzle holder 30 is formed with a connector mounting portion 30d into which a connector to be connected to the supply hose 26 is inserted. A hollow portion 30e connected to the other end of the projection material passage 30a is formed in the connection tool mounting portion 30d. The inner diameter of the hollow portion 30e is gradually increased in the direction of the other end of the nozzle holder 30, and is expanded to the inner diameter into which the connector is inserted. Screws 30f are formed on the outer peripheral surfaces of the nozzle insertion portion 30b and the connector mounting portion 30d. A flange 30g is formed on the outer peripheral surface of the nozzle holder 30 in the vicinity of the nozzle insertion portion 30b. Further, an intermediate portion between the nozzle insertion portion 30b and the flange 30g of the nozzle holder 30 is an insertion portion 30i inserted into the through hole 20b of the DD motor 20, and a plurality of circumferential grooves 30h are formed on the outer peripheral surface of the insertion portion 30i. Is formed.

  The DD motor 20 shown in FIG. 3 is bolted to the bracket 21 using the bolt hole 20f of the first fixing portion 20c as shown in FIG. Further, the rotation base 32 is bolted to the rotation drive unit 20e of the DD motor 20 by using the bolt hole 20f. A flange 30 g of a nozzle holder 30 inserted in the through hole 20 b of the DD motor 20 is connected to the rotation base 32. When the rotation drive unit 20 e of the DD motor 20 is driven, the nozzle holder 30 rotates together with the rotation base 32. The insertion portion 30 i of the nozzle holder 30 is inserted into the through hole 20 b of the DD motor 20, and the nozzle insertion portion 30 b protrudes from the first fixing portion 20 c of the DD motor 20. A tube 34 made of plastic such as polyurethane is inserted into the hollow portion 30c of the nozzle insertion portion 30b, and the rear end portion of the first nozzle 24 is inserted into the tube 34. Further, the cap 36 is screwed onto the screw 30f on the outer peripheral surface of the nozzle insertion portion 30b, and the rear end portion of the first nozzle 24 inserted into the nozzle insertion portion 30b is fixed. The first nozzle 24 is formed with an injection port 24a for injecting the projection material together with the compressed air on the side surface of the tip portion, and the projection material and the compressed air are below the oblique line of the first nozzle 24 (in the direction of arrow A in FIG. 2). ) Is injected. In this way, the connection location between the first nozzle 24 and the nozzle holder 30 is outside the first fixed portion of the DD motor 20, and even if the projection material is ejected together with the compression space from the connection location, the inside of the blast chamber 14 The possibility of being ejected toward the first fixed portion of the DD motor 20 can be eliminated.

  A gap is formed between the first fixed portion 20c of the DD motor 20 and the rotation driving portion 20e. When dust floating in the blast chamber 14 enters from the gap, a bearing or the like in the DD motor 20 is moved. Easy to be damaged. For this reason, as shown in FIG. 2, the first fixing portion 20 c side including the rotation drive portion 20 e of the DD motor 20 is covered with the lid 38. The lid 38 is fixed to the bracket 21, and the nozzle insertion portion 30 b of the nozzle holder 30 is inserted into the opening thereof. Further, a ring-shaped seal member 40a is inserted into each of the gap between the opening of the lid 38 as a fixing member and the nozzle insertion portion 30b as the rotation member and the gap between the rotation base 32 and the bracket 21. .

  As described above, the first fixed portion 20c side including the rotational drive portion 20e of the DD motor 20 is sealed with the lid 38 and the seal member 40a, and dust in the blast chamber 14 is prevented from entering from the first fixed portion 20c side. it can. Further, a space 42 is formed between the lid 38 and the rotation base 32 and the flange 30g of the nozzle holder 30. When the seal member 40a deteriorates and fine dust begins to enter the lid 38, the space 42 rotates. Fine dust adheres to the surface of the base 32 and the flange 30g facing the space 42. For this reason, it is possible to easily determine the replacement time of the seal member 40a by removing the lid 38 and observing the dirt state of the surfaces of the rotary base 32 and the flange 30g.

  On the second fixing portion 20d side of the DD motor 20, the connection tool mounting portion 30d of the nozzle holder 30 protrudes from the second fixing portion 20d. A hose joint 28 that is a connector for connecting the supply hose 26 is connected to the connector mounting portion 30d. The hose joint 28 is supported by a plurality of support bases 46 protruding from a fixed base 44 fixed to the second fixed portion 20d, and is fixed to the fixed base 44 via a predetermined gap. 28a and cylindrical portions 28b and 28c that penetrate the flange portion 28a and protrude on both surfaces thereof are formed. The cylindrical portion 28b has a distal end portion inserted in the connector mounting portion 30d of the nozzle holder 30, and a supply hose 26 is inserted in the other cylindrical portion 28c. For this reason, the supply hose 26 is connected to the projection material passage 30 a of the nozzle holder 30 via the hose joint 28.

  A seal socket 48 that covers a connection portion of the hose joint 28 with the tubular portion 28b is externally inserted and screwed into the connection tool mounting portion 30d of the nozzle holder 30. The seal socket 48 extends so as to cover the outer peripheral surface of the cylindrical portion 28b. A ring-shaped seal member 40 b is inserted into each of the gap between the extended seal socket 48 and the inner wall surface and the gap between the seal socket 48 and the fixed base 44.

  Furthermore, an O-ring as a seal member 40c is inserted into each of the plurality of circumferential grooves 30h formed on the outer peripheral surface of the insertion portion 30i of the nozzle holder 30 inserted into the through hole 20b of the DD motor 20. As a result, the gap between the inner wall surface of the through hole 20b and the outer peripheral surface of the insertion portion 30i can be sealed, and dust can be reliably prevented from entering the first fixed portion 20c via the gap. Further, by covering the entire DD motor 20 with a resin cover, it is possible to further prevent dust from entering the DD motor 20. For example, an oil seal, a dust seal, or an O-ring can be suitably used as the seal members 40a, 40b, and 40c.

  As shown in FIG. 5, the second nozzle 50 that is provided on the wall 22 with a predetermined distance away from the first nozzle 24 extends from the injection port 50 a that is open at the tip. The blast material and compressed air supplied from the supply hose 52 are jetted in the direction (arrow C direction (downward)). The rear end of the second nozzle 50 is inserted into a plastic tube 56 such as polyurethane inserted into one end of a nozzle holder 54 fixed to the wall 22. Further, a cap 58 on the outer peripheral surface on one end portion side of the nozzle holder 54 is screwed, and the rear end portion of the second nozzle 50 is fixed. A supply hose 52 is inserted on the other end side of the nozzle holder 54 and connects the second nozzle 50 and the supply hose 52.

  FIG. 6 shows an example in which core sand adhered to an inner wall surface such as a through hole of a workpiece 60 that is a cast product is removed by blasting using the blasting apparatus 10 shown in FIGS. A workpiece 60 shown in FIG. 6 has a plurality of lateral holes 60b formed in the middle of the through hole 60a. Core sand 61 adheres to the inner wall surfaces of the through holes 60a and the horizontal holes 60b. The workpiece 60 is chucked on the arm 18 of the articulated robot 16, and first, the second nozzle 50 performs blasting mainly on the inner wall surface of the through hole 60 a of the workpiece 60. In this blasting process, as shown in FIG. 6 (a), the articulated robot 16 is arranged such that the injection port 50a of the second nozzle 50 is positioned 20-30 mm above one side of the opening of the through hole 60a. After the workpiece 60 is moved by the arm 18, the projection material and the compressed air are ejected from the ejection port 50a of the second nozzle 50 for a predetermined time. Further, the projection material and the compressed air are jetted from the jet opening 50a of the second nozzle 50 for a predetermined time in the same manner from the other opening of the through hole 60a of the workpiece 60.

  The core sand 61 adhering to the inner wall surface of the through hole 60a and the inner wall surface of the side hole 60b on the through hole 60a side is removed by the injection of the projection material and the compressed air from the injection port 50a of the second nozzle 50. Yes. The projection material injected from the injection port 50a of the second nozzle 50 diffuses together with the compressed air, collides directly with the inner wall surface of the through hole 60a, collides with and reflects the inner wall surface, and collides with the inner wall surface again. The core sand 61 adhering to the inner wall surface can be removed by direct collision and re-collision with the inner wall surface of the through hole 60a of the projection material. Further, part of the projection material reflected by the inner wall surface of the through hole 60a re-impacts on the inner wall surface of the horizontal hole 60b on the through hole 60a side, and the core sand 61 adhering to the inner wall surface is also removed at the same time. However, the removal of the core sand 61 adhering to the inner wall surface on the far side away from the through hole 60a of the horizontal hole 60b is insufficient.

  For this reason, the arm 18 of the articulated robot 16 is moved, and the core sand 61 adhering to the inner wall surface on the back side of the horizontal hole 60b is removed by the first nozzle 24. The first nozzle 24 is inserted into the through hole 60a of the workpiece 60, and as shown in FIG. 6 (b), the injection port 24a of the first nozzle 24 is provided at the opening of the horizontal hole 60b where the core sand 61 is removed. When the position is reached, the insertion of the first nozzle 24 into the through hole 60a is stopped. Next, the DD motor 20 is driven to rotate the first nozzle 24, the mixed projection material and compressed air are supplied from the supply hose 26 to the first nozzle 24, and the hole is formed from the injection port 24 a of the first nozzle 24. A blasting material is injected with compressed air toward an inner wall surface. The core sand 61 adhering to the inner wall surface on the back side of the horizontal hole 60b can be removed by the injection of the projection material and the compressed air. At this time, the DD motor 20 is driven to inject the projection material from the injection port 24a of the first nozzle 24 continuously with the compressed air toward the inner wall surface of the horizontal hole 60b, while the injection port 24a of the first nozzle 24 When facing the horizontal hole 60b, the driving of the DD motor 20 is preferably stopped, and the projection material is preferably injected together with the compressed air toward the horizontal hole 60b. Compared to the case where the projection material is uniformly sprayed with the compressed air over the entire inner wall surface of the through hole 60a, the core sand 61 of the horizontal hole 60b can be removed quickly and the damage to the inner wall surface of the through hole 60a is reduced. it can.

  In the blasting device shown in FIGS. 1 to 5, since the connection location between the nozzle holder 30 and the first nozzle 24 and the connection location with the supply hose 26 are separated from the DD motor 20, the projection material is compressed from the connection location, for example. Even if ejected together with the air, it can be ejected into the blast chamber 14 without entering the DD motor 20, and the projection material can be prevented from being ejected directly toward the DD motor 20 together with the compressed air.

  In addition, dust floating at a high concentration in the blast chamber 14 is also covered with the lid 38 on the first fixed portion 20c side where the rotational drive unit 20e of the DD motor 20 is provided, and the lid 38, the fixed base 44, etc. A ring-shaped seal member 40a is inserted in the gap between the fixed member and the rotating member such as the nozzle insertion portion 30b. Further, the seal member 40 c is also inserted into the gap between the inner wall surface of the through hole 20 b of the DD motor 20 and the outer peripheral surface of the insertion portion 30 i of the nozzle holder 30. For this reason, it is possible to prevent dust from entering the DD motor 20 through a gap such as the rotation drive unit 20e. In this way, dust can be prevented from entering the DD motor 20, and the DD motor 20 as the rotational drive source of the first nozzle 24 can be mounted on the outer wall surface of the wall 22 of the blast chamber 14. According to the DD motor 20, the rotational driving force can be directly transmitted to the first nozzle 24, and the rotation angle of the first nozzle 24 can be reliably adjusted. Furthermore, since the DD motor 20 is lightweight, the wall 22 of the blast chamber 14 can be made thinner than when a conventional motor is mounted.

  In the blasting device 10 shown in FIGS. 1 to 5, the flange 30g of the nozzle holder 30 is connected to the rotation drive unit 20e of the DD motor 20 via the rotation base 32, but the flange 30g is directly connected to the rotation drive unit 20e. May be. Further, although the support base 46 is mounted on the second fixed portion 20d of the DD motor 20 via the fixed base 44, the support base 46 may be directly mounted on the second fixed portion 20d. Instead of the articulated robot 16, a moving device provided with a cylinder device that moves up and down in the XY moving device may be adopted.

  As the second nozzle 50, a metal or ceramic nozzle shorter than the long nozzle shown in FIG. 5 can be used. When such a short nozzle is used for the second nozzle 50, it is preferable to adjust the position of the ejection port 50 a of the second nozzle 50 by changing the length of the nozzle holder 54.

  The blasting apparatus according to the present invention can be suitably used for blasting a workpiece such as a cast product.

  10 is a blasting device, 12 is a curtain, 14 is a blast chamber, 16 is an articulated robot, 18 is an arm, 20 is a DD motor, 20a is a cylindrical casing, 20b is a through hole, 20c is a first fixing portion, and 20d is a first fixing portion. 2 fixed part, 20e is a rotation drive part, 20f is a bolt hole, 21 and 53 are brackets, 22 is a wall, 24 is a first nozzle, 24a and 50a are injection ports, 26 and 52 are supply hoses, 28 is a hose joint, 28a is a bowl-shaped portion, 28b and 28c are cylindrical portions, 30 and 54 are nozzle holders, 30a is a projection material passage, 30b is a nozzle insertion portion, 30c and 30e are hollow portions, 30d is a fitting mounting portion, and 30f is a screw. , 30g is a flange, 30h is a circumferential groove, 30i is an insertion portion, 32 is a rotation base, 34 and 56 are tubes, 36 and 58 are caps, 38 is a lid, 40a, 40b and 40c are 42, a space, 44 a fixed base, 46 a support base, 48 a seal socket, 50 a second nozzle, 60 a workpiece, 60a a through hole, 60b a side hole, 61 a core sand is there.

Claims (8)

A blasting apparatus for performing blasting by injecting a mixed projection material and compressed air supplied from a supply hose onto a workpiece movable in a vertical direction and a horizontal direction by a moving means provided in a blast chamber. ,
A long first nozzle in which an injection port for injecting the projection material and compressed air is formed on the side surface of the tip portion;
A through-hole mounted on the outer wall surface of the blast chamber, penetrating along the central axis of the cylindrical casing, and formed in the first fixing portion and the second fixing portion forming both end portions of the cylindrical casing; A direct drive motor including a rotation drive unit that rotates along an opening edge of the through hole of the first fixed unit;
A projection material passage connected to the rotation drive unit of the direct drive motor and formed in a mixed state for the projection material and the compressed air formed along the long axis of the insertion portion inserted into the through hole; A nozzle insertion portion that is inserted into the blast chamber through the one fixing portion and the wall, the rear end side of the first nozzle is inserted and connected to one end side of the projection material passage, and the second fixing portion. A nozzle holder that protrudes and is provided with a connection tool mounting portion on which the connection tool with the supply hose is mounted on the other end side of the projection material passage;
A seal socket that is extrapolated to the connection tool mounting portion so as to rotate together with the nozzle holder and covers a connection portion with the connection tool;
The nozzle insertion portion is rotatably inserted into an opening of a lid attached to the first fixing portion so as to cover the first fixing portion including the rotation driving portion of the direct drive motor; and A blasting device, wherein a seal member is inserted into each of a gap between the opening of the lid and the nozzle insertion portion and a gap between the seal socket and the connector. The connecting tool penetrates a hook-shaped portion fixed to a fixed base fixed to the second fixed portion of the direct drive motor via a predetermined space, and a cylindrical portion protrudes from each surface thereof, One end portion of the tubular portion is a hose joint inserted into the connector mounting portion of the nozzle holder, and the supply hose is inserted into the other tubular portion,
The blasting assembly according to claim 1, wherein a sealing member is inserted into a gap between one outer peripheral surface of the cylindrical portion of the hose joint and an inner wall surface of the seal socket portion extending to cover the outer peripheral surface. apparatus.   The blasting device according to claim 2, wherein the hook-shaped portion of the hose joint is supported by a support body standing on a fixed base attached to the second fixed portion of the direct drive motor.   The blasting device according to any one of claims 1 to 3, wherein a seal member is inserted into a concave groove provided around an outer peripheral surface of an insertion portion of a nozzle holder inserted into a through hole of the direct drive motor.   A flange provided around the outer peripheral surface of the nozzle insertion portion of the nozzle holder is connected to a rotation base attached to the rotation drive portion of the direct drive motor attached to the outer wall surface of the wall via a bracket. The blasting apparatus according to claim 1, wherein a space is formed between the rotation base and the lid.   The blasting apparatus according to claim 5, wherein a seal member is inserted into a gap between the rotation base and the bracket.   The blasting apparatus according to any one of claims 1 to 6, wherein the moving means is an arm of an articulated robot disposed in the blast chamber. On the inner wall surface of the blast chamber, a long second nozzle having a nozzle opening at the tip is mounted at a position different from the mounting position of the first nozzle. The blasting device according to claim 7, wherein the projection material and the compressed air are jetted in a nozzle extending direction.