JP2015128813A - Shot blast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shot blast device that can prevent a side drum and an endless belt from being separated from each other and can promptly discharge a cleaned component when the cleaned component is discharged from a cleaned component placement part.SOLUTION: By driving an inclination adjustment structure 21, axial inclination of a roller generated in an endless belt 14 supported by an auxiliary tension roller is adjusted. A driven roller 13 is movable between an upper position and a lower position via an auxiliary roller. When the driven roller 13 is located in the upper position, a cleaned component is cleaned while being agitated on the endless belt 14 rotating in the normal rotating direction. When the driven roller 13 is located in the lower position, the endless belt 14 is rotated in the reverse direction so that the cleaned component that has been cleaned can be discharged from a front edge of the endless belt 14.

Description

  The present invention relates to a shot blasting apparatus that is applied to the cleaning of parts to be cleaned such as small articles and thin articles, and more specifically to a so-called apron type shot blasting apparatus.

  Conventionally, an endless belt that is stretched between a plurality of rollers each including at least a driving roller, a tension roller, and a driven roller, and is provided to rotate while contacting the endless belt with a predetermined circumferential length. A shot blasting apparatus is known that includes a pair of side drums that form a part to be cleaned for mounting a part to be cleaned on the endless belt. In this shot blasting apparatus, an endless belt is rotated in the forward direction to sweep the abraded parts put into the abraded part mounting portion while stirring. In addition, this shot blasting apparatus discharges the cleaned parts to be cleaned from the front edge side of the endless belt by rotating the endless belt in the reverse rotation direction. The shot blasting apparatus configured as described above is called an apron type shot blasting apparatus.

  As an apron type shot blasting apparatus known conventionally, what was indicated in patent documents 1 shown below is known, for example. The shot blasting device described in Patent Document 1 is capable of rotating a rotating plate and three rollers in a space of a frame formed by side plates and transfer plates arranged on both side walls of the cabinet inside the cabinet. Provided. The rotating plate is provided in the space of the frame so as to be opposed to the side plate via a support shaft, and the three rollers are provided at a position surrounding the rotating plate.

  In addition, the shot blasting device described in Patent Document 1 has an endless belt stretched between these rollers, and an endless belt receiving portion and a rotating plate are formed by the endless belt and two rotating plates. It is configured to tilt and complete the discharge of the part to be cleaned from the part receiving part to be cleaned.

  However, the shot blasting device described in Patent Document 1 is configured to rotate the entire frame, and has a problem that the entire device becomes large. Therefore, a shot blasting apparatus described in Patent Document 2 shown below has been proposed as an improvement of the shot blasting apparatus described in Patent Document 1. In the shot blasting device described in Patent Document 2, side drums are connected to each other by a connecting shaft, and are provided so as to be rotatable around a drive pulley, and a tension pulley is provided to be movable. The part to be cleaned is formed by rotating upward and the tension pulley is rotated downward, so that the contact point between the side drum and the endless belt is located above the front pulley and The parts to be polished are discharged from the part receiving part for polishing.

  In the shot blasting device described in Patent Document 2, the tension roller is rotated while the side drum and the endless belt are grounded to change the position of the endless belt, so that a considerable amount of load is applied. There has been a problem that the moving endless belt is easily damaged.

Therefore, the applicant of the present application has proposed an apron type shot blasting device described in Patent Document 3 shown below. In the apron type shot blasting device described in Patent Document 3, the contact start point between the endless belt and the side drum is positioned higher than the dropping point of the parts to be cleaned that fall with the rotation of the endless belt. A driven roller is provided, the driven roller can be moved up and down, and the driven roller is configured to move downward when discharging the parts to be cleaned.

JP-A-6-000769 JP-A-9-029643 Japanese Examined Patent Publication No. 4-060788 JP 2008-137128 A

  Generally, an endless belt is formed by abutting the end portions of the belt with each other and joining the end portions by an arbitrary method such as adhesion. However, the endless belt formed in this way has a problem that a variation easily occurs between the circumferential length on one side in the width direction of the endless belt and the circumferential length on the other side in the width direction of the endless belt. That is, the endless belt is obtained by cutting a belt-shaped body having a predetermined length from a long body, and then abutting and joining the ends of the belt-shaped body. However, when the belt molded body is cut out, the end of the belt molded body is not cut so that the side of the end with respect to the side in the longitudinal direction is perpendicular, and the angle of the side of the end with respect to the side in the longitudinal direction is a right angle. May cause a slight angle variation. In such a case, the length of the belt molded body in the longitudinal direction is such that the long side on one side in the width direction is long and the long side on the other side in the width direction is short. Therefore, when the end portions of the belt molded body are butted together to form an endless belt, the circumferential length on one side in the width direction and the circumferential length on the other side in the width direction are not the same, and there is some variation.

  Thus, when variation occurs between the circumferential length on one side in the width direction of the endless belt and the circumferential length on the other side in the width direction, the endless belt is attached to the shot blasting device, and tension is applied by the tension roller. Sometimes, the tension acting on one side in the width direction and the other side in the width direction are not the same, and the endless belt acts on the short side (in the example shown above, the other side in the width direction). The magnitude of the tension to be applied is larger than the magnitude of the tension acting on the side where the circumferential length of the endless belt is long (in the example shown above, one side in the width direction).

  Therefore, in the conventional shot blasting device, particularly when the endless belt is rotated in the reverse rotation direction, the endless belt swings in the width direction and snakes or moves in a predetermined direction with respect to the width direction. There was a problem. In particular, if the amount of movement when meandering or moving in the width direction is increased, the ground contact with the side drum on one side and the other side in the width direction is released and the parts to be cleaned cannot be quickly discharged. There was a problem.

  The present invention has been made in view of the above-described problems, and prevents the side drum and the endless belt from separating when the component to be cleaned is discharged from the component to be cleaned portion. It is an object of the present invention to provide a shot blasting apparatus that can quickly eject the parts to be cleaned in the mounting portion.

The present invention
(1) A cabinet, at least a driving roller, a tension roller and a driven roller that are pivotally supported by the cabinet, an endless belt having a predetermined width that is stretched between the rollers, and is rotatably supported by the cabinet. A pair that abuts the endless belt with a predetermined circumferential length and forms a part to be cleaned on the endless belt and between the driving roller and the driven roller to place a part to be cleaned. A side drum, an auxiliary tension roller that applies a predetermined tension to the endless belt, an auxiliary roller that is provided below the side drum via the endless belt, supports the endless belt, and interlocks with the driven roller, And an arm mounted between the driven roller and the auxiliary roller, and the auxiliary roller is operated via the arm by the operation of the auxiliary roller. The driven roller is movable between a placement position for placing the parts to be polished and a discharge position for discharging the parts to be polished. At the placement position, the endless belt and the side drum are in contact with each other. The front edge of the driven roller in the width direction is lifted to a position above the drop point of the part to be cleaned where the contact start point is agitated, and the front edge is lowered at the discharge position. The to-be-cleaned part that has been abraded by rotating the endless belt in the reverse direction while agitating the abraded part that has been put into the part mounting portion with stirring by the endless belt that rotates in the forward direction. Is a shot blasting device configured to be able to be discharged from the edge side of the endless belt on the driven roller side, and includes a tilt adjusting structure that adjusts a tilt in the width direction of the endless belt, and the tilt adjusting structure includes: Against the cabinet The movable plate includes a movable plate, and a driving device that slides the movable plate, and the auxiliary tension roller is pivotally supported by the movable plate, and moves through the movable plate that is slid by driving of the driving device. A shot blasting device characterized by adjusting an inclination of the endless belt supported by an auxiliary tension roller;
(2) The inclination adjusting structure includes a first fixing portion that fixes one end portion to the cabinet and a second fixing portion that fixes the other end portion to the movable plate, and the first fixing portion and the second fixing portion. A movable plate sliding device comprising a connecting member disposed between the fixed portions and moving the second fixed portion relative to the first fixed portion, and the movable plate is a shaft end portion of the auxiliary tension roller. And the movable plate slides together with the second fixed portion by driving of the sliding device of the sliding plate, and is supported by the bearing member disposed on the movable plate. The shot blasting apparatus according to (1), wherein the auxiliary tension roller is moved to adjust an inclination angle of the auxiliary tension roller with respect to a width direction of the endless belt,
(3) The shot blast according to (2), wherein the first fixed portion and the second fixed portion of the movable plate sliding device include a bracket and a nut, and the continuous member is formed of a screw-like member that is screwed to the nut. apparatus,
(4) The shot blast according to (1), wherein the auxiliary roller is connected to a driving device including a driving rod that drives the driven roller between the placement position and the discharge position via the arm. apparatus,
(5) The driving roller includes a roller main body, a support shaft protruding from the roller end, and a pair of flanges provided at both ends of the roller main body. The endless belt has a side edge portion of the endless belt at the flange. When the endless belt traveling is biased in the width direction, the side edge of the endless belt contacts the inner surface of the flange and repairs the bias. (1) A gist of the shot blasting apparatus described above.

  According to the present invention, the magnitude of the tension applied to the endless belt can be adjusted by inclining the auxiliary roller in the width direction of the endless belt. Therefore, according to the present invention, when there is a variation in the magnitude of the tension applied to the endless belt, it is possible to eliminate the tension variation and make the tension applied to the endless belt uniform. Further, meandering and bias of the endless belt can be prevented, and the parts to be cleaned in the part to be cleaned can be quickly discharged.

It is a partially cutaway perspective view of the shot blasting apparatus of the present invention. It is a figure which shows the example of the embodiment at the time of the projection polishing which a driven roller is located in a mounting position. It is a figure which shows the example of the embodiment at the time of discharge | emission of the to-be-cleaned components in which a driven roller is located in a discharge position. It is sectional drawing of a shot blasting apparatus. It is sectional drawing of a shot blasting device when an auxiliary tension roller is inclined. It is a perspective view of a guide plate. (A) is a front view of a guide plate, (b) is a side view of the guide plate, and (c) is a top view of the guide plate. It is a principal part enlarged view which shows the example of the embodiment of the ditch | groove provided in the driven roller. (A) The figure is explanatory drawing of the path length of the endless belt at the time of projection scouring, (b) The figure is explanatory drawing of the path length of the endless belt at the time of discharge | emission of parts to be polished. It is a fragmentary sectional view showing the modification of the shot blasting device concerning the present invention.

  Below, the shot blasting apparatus 1 which concerns on embodiment of this invention is demonstrated. As shown in FIGS. 1 to 5, the shot blasting device 1 includes a cabinet 2, an abrasive transporting unit 3, an abrasive transporting tube 4, and an abrasive projecting unit 5. The cabinet 2 constitutes an outer frame of the shot blasting apparatus 1, and a space for accommodating and polishing the parts to be polished is formed therein. The abrasive material transport unit 3 is for conveying the abrasive material from the lower part to the upper part of the shot blasting apparatus 1. For example, as shown in FIG. 2, the abrasive material conveying unit 3 includes a bucket 6 that rotates to convey the abrasive material, and the abrasive material is conveyed from the lower portion toward the upper portion by the bucket 6. The The scouring material transport pipe 4 is for transporting the scouring material transported in the scouring material transport unit 3 toward the scouring material projection unit 5, and the scouring material projection unit 5 This is for projecting the abrasive material transported by the transport pipe 4 into the cabinet 2.

  The shot blasting apparatus 1 of the present invention includes a driving roller 11, a tension roller 12, a driven roller 13, and an endless belt 14 that is stretched between these rollers and rotates. The endless belt 14 has a predetermined circumferential length. And a pair of side drums 16 that form a to-be-cleaned part mounting portion 15 between the driving roller 11 and the driven roller 13 on the endless belt 14. The drive roller 11 is configured to be able to run the endless belt 14 in the forward rotation direction or the reverse rotation direction by rotating forward and backward by a drive device (not shown). The pair of side drums 16 are rotatably provided on the side plate 17 of the cabinet 2. A feed roller 18 that contacts the lower side of the endless belt 14 is provided below the endless belt 14 that contacts the side drum 16.

  The auxiliary roller 19 is formed below the side drum 16 and closer to the driven roller 13 than the lowest part of the part to be cleaned 15 formed by the side drum 16, the drive roller 11, and the driven roller 13. Is provided. The auxiliary roller 19 is connected to the driven roller 13 by a connecting arm 20. An auxiliary tension roller 37 is provided between the driven roller 13 and the tension roller 12 at a position facing the auxiliary roller 19 with the endless belt 14 interposed therebetween, and is in contact with the endless belt 14.

  The auxiliary tension roller 37 is configured to apply a predetermined tension to the endless belt 14 and is configured to be inclined in the width direction of the endless belt 14. That is, the tilt adjusting structures 21 are provided at both ends of the auxiliary tension roller 37 in the longitudinal direction (that is, the width direction of the endless belt 14). As shown in FIGS. 4 and 5, the tilt adjustment structure 21 includes a movable plate 22, a bearing member 23, and a movable plate sliding device 24. The bearing member 23 is aligned coaxially with the axis of the auxiliary tension roller 37. The movable plate 22 is disposed at a position covering the hole 17a formed in the side plate 17 of the cabinet 2 and is provided so as to be movable in the vertical direction with respect to the side plate 17. On the movable plate 22, a bearing member 23 is attached and fixed to the outside of the movable plate 22 by a method such as screwing, and an upper portion of the movable plate sliding device 24 is fixed. Further, the lower part of the movable plate sliding device 24 is fixedly attached to the cabinet 2, and when the movable plate sliding device 24 is operated in the vertical direction, the movable plate 22 is moved in the vertical direction accordingly. Yes.

  The bearing member 23 attached and fixed to the movable plate 22 has a shaft insertion hole 25a formed so that the end of the auxiliary tension roller 37 can be inserted, and the end of the auxiliary tension roller 37 is the shaft insertion hole. 25a is rotatably fitted. The bearing member 23 has a bearing body 25 having an outer peripheral surface formed into a spherical shape, and a storage portion 26a having a size capable of storing at least a part of the bearing body 25 and an inner peripheral surface formed into a spherical shape. And a base portion 26 having In the bearing member 23, since both the outer peripheral surface of the bearing body 25 and the inner peripheral surface of the storage portion 26a are formed in a spherical shape, the movable plate 22 moves in the vertical direction and the inclination angle of the auxiliary tension roller 37 changes. Even in such a case, it is possible to smoothly adjust and cope with the change.

  More specifically, the movable plate sliding device 24 includes a first fixing member 27 that is fixedly attached to the side plate 17 of the cabinet 2, a second fixing member 28 that is fixedly attached to the movable plate 22, and these first fixing members. 27 and a connecting member 29 attached to the second fixing member 28. In the present embodiment, the first fixing member 27 is constituted by a bolt and a nut. The first fixing member 27 can be attached and fixed to the side plate 17, and one end of the connection member 29 is screwed and attached. . The second fixed member 28 can be attached and fixed to the movable plate 22 and is formed so that the other end of the connecting member 29 is screwed and attached. The connecting member 29 connected to the first fixing member 27 and the second fixing member 28 adjusts the position of the bolt with respect to the second fixing member 28 with a nut, whereby the protruding amount of the bolt with respect to the second fixing member 28 is adjusted. It is configured to be able to adjust. Thus, if the protrusion amount of a volt | bolt is adjusted, the position of the 2nd fixing member 28 currently fixed to the said other end of a volt | bolt will move to an up-down direction. Then, when the position of the second fixing member 28 moves in the vertical direction, the movable plate 22 and the bearing member 23 to which the second fixing member 28 is attached and fixed move in the vertical direction, and the end portion is fitted in the bearing member 23. The attached auxiliary tension roller 37 also moves in the vertical direction. By performing such an operation on one of the end portions of the auxiliary tension roller 37 in the longitudinal direction, the auxiliary tension roller 37 can be inclined by a predetermined amount. In the present embodiment, the example in which the bolt and the nut are used to move the second fixing member 28 in the vertical direction has been described. However, the configuration in which the second fixing member 28 is moved in the vertical direction is described. It is not limited to this. For example, the movable plate sliding device 24 and the second fixed member 28 may be moved in the vertical direction by pneumatic pressure or hydraulic pressure using a cylinder, or electrically movable plate using a drive motor. You may comprise so that the sliding apparatus 24 and the 2nd fixing member 28 may be moved to an up-down direction. Furthermore, the second fixing member 28 can be configured to move in the vertical direction by a configuration including a drive device other than these.

  The connecting arm 20 is rotatably connected to the rotation shafts of the driven roller 13 and the auxiliary roller 19. The auxiliary roller 19 is connected to a drive rod 31 operated by a drive device (arm drive device) 30 such as an air cylinder, and is connected to an arm 32 that is pivotably operated. By being actuated, the driven roller 13 is configured to move up and down via the connecting arm 20. As a result, the driven roller 13 can be moved to the upper position at the time of the projection cleaning of the parts to be cleaned, and the driven roller 13 can be moved to the lower position at the time of discharging the parts to be cleaned.

  A drive device (arm drive device) 30 such as an air cylinder for operating an arm 32 that moves the auxiliary roller 19 movably connected to the driven roller 13 by the connecting arm 20 is a fixed portion provided at the bottom of the cabinet 2. It is fixed using a fastener such as a bolt and nut. The insertion hole of the fixing tool in the fixing portion is formed in an elongated hole shape, and the fixing position of the driving device 30 can be adjusted as necessary, whereby the height of the upper position and the lower position of the driven roller 13 can be adjusted. It is possible to arbitrarily adjust the height.

  A guide plate 34 is attached to the connecting arm 20 via a guide plate mounting member 33. The guide plate 34 is provided such that a tip portion thereof is positioned at a front edge portion 35 of the driven roller 13 and a rear portion thereof is positioned at an outer portion of the side drum 16. The guide plate 34 is connected to the connecting arm 20 that moves up and down. Therefore, the guide plate 34 moves together with the connecting arm 20, and when the driven roller 13 is located at the upper position, the contact portion of the endless belt 14 with the auxiliary roller 19. To the front edge 35 of the driven roller 13. Further, when the parts to be cleaned are discharged, the guide plate 34 is separated from the contact point of the endless belt 14 with the side drum 16, that is, the position where the endless belt 14 is separated from the side drum 16 and the front edge portion of the driven roller 13. 35.

  As shown in FIGS. 6 and 7, the guide plate 34 is fixed to the guide plate mounting member 33 by a fixture 38 such as a bolt and nut via a guide plate fixing portion 36 of the guide plate mounting member 33. The guide plate fixing portion 36 is preferably formed in a long hole shape so that the height of the guide plate 34 can be adjusted. The guide plate 34 and the guide plate mounting member 33 are provided with an interval corresponding to the thickness of the connecting arm 20 (indicated by the symbol a in FIG. 7B), and the guide plate 34 is on the side to be cleaned-part mounted portion 15 side. It is arranged and attached so as to be (inside the device).

  The shape of the guide plate 34 is rectangular, and one of the long sides is located at the front edge portion 35 of the driven roller 13, and the other is at least a length located near the center of the rotation shaft of the auxiliary roller 19. The contact point between the side drum 16 and the endless belt 14 and the upper surface of the endless belt 14 of the driven roller 13 are substantially parallel, that is, the contact point between the side drum 16 and the endless belt 14 when the parts to be cleaned are discharged. The height may be any height as long as it can prevent the polished parts from falling from both sides in the width direction of the endless belt 14 when the position becomes lower.

  Further, the front portion of the guide plate 34 (the front edge portion 35 of the driven roller 13) is preferably formed in an arc shape so that the lower portion thereof follows the driven roller 13. As a material of the guide plate 34, a metal plate, a synthetic resin plate, a laminated plate, or the like can be used. Further, a metal plate, a synthetic resin plate, a laminated plate, or the like can be used as a material for the guide plate mounting member 33. Here, the material of the guide plate 34 and the material of the guide plate mounting member 33 may be the same or different. Further, if the guide plate 34 and the guide plate mounting member 33 are too thick, the weight is increased and a large load is applied when the driven roller 13 moves up and down, and it is not preferable. If the thickness is too thin, the strength is insufficient. It is not preferable. Although it depends on the material used, in general, the thickness of the guide plate 34 and the guide plate mounting member 33 is selected in the range of several mm to 10 mm, and usually in the range of 3 mm to 5 mm. Arbitrarily selected.

  The endless belt 14 is provided with a plurality of discharge holes 41 for discharging the abrasive. The abrasive to be projected at the time of the projecting and polishing is subjected to the removal of the parts to be polished by the parts to be cleaned 15 (cleaning part), and is dropped and discharged from the discharge holes 41 provided in the endless belt 14. Most of them are dropped and discharged. However, a part of the abrasive may not be completely dropped from the discharge hole 41 provided in the endless belt 14 but may be caught by the discharge hole 41 and remain. If the abrasive remains on the endless belt 14, the surface of the endless belt 14 or the roller that rotates may be damaged.

  In the present invention, any of the driving roller 11, the tension roller 12 and the driven roller 13 on which the endless belt 14 is stretched may be used, but generally, a plurality of concave grooves 42 are formed on the surface of the driven roller 13 as shown in FIG. It is also possible to discharge and collect the remaining polishing material caught in the discharge hole 41 of the endless belt 14 and drop it with the rotation of the roller. The groove may be provided extending in the longitudinal direction of the roller, or may be provided in a direction intersecting the longitudinal direction, that is, in the circumferential direction of the roller. The width and depth of the groove may be such that the travel of the endless belt 14 is not hindered. Usually, the width of the groove may be in the range of 30 mm to 50 mm, and the depth of the groove may be in the range of 10 mm to 40 mm.

  Further, in the present invention, it is preferable that a protruding protrusion 43 extending in a direction intersecting the traveling direction of the endless belt 14 is disposed on the side of the endless belt 14 to be cleaned. The ridge protrusion 43 has a cross-sectional shape that is inclined in a slope shape on the front side with respect to the forward rotation direction in which the vehicle runs and the rear side is formed in a steep slope or perpendicular to the surface of the endless belt 14. It is preferable. By arranging the protrusions 43 on the side of the part 15 to be cleaned, it becomes easy to lift up and stir the part to be cleaned as the endless belt 14 travels during projection cleaning. Abrasion can be performed quickly. Further, since the traveling direction of the endless belt 14 is rotated in the opposite direction to that during the projection cleaning when the parts to be cleaned are ejected, the parts to be cleaned are pushed out by a steep slope or vertical surface, and the parts to be cleaned are removed. The discharge can be performed promptly.

  The tension roller 12 is for applying a predetermined tension to the endless belt 14. The tension roller 12 is provided with an adjusting means 44 for adjusting the tension of the endless belt 14 that rotates and adjusts the tension of the endless belt 14 so that the tension of the endless belt 14 can be arbitrarily adjusted. Yes.

  When the part to be polished that has moved the driven roller 13 to the lower position is ejected, the path length of the endless belt 14 changes and the endless belt 14 bends compared to the time of the projection cleaning in which the driven roller 13 is positioned at the upper position. Sometimes. However, the shot blasting apparatus 1 according to the present invention has an auxiliary tension roller 37 that is in contact with the endless belt 14 at a position between the driven roller 13 and the tension roller 12 and facing the auxiliary roller 19 with the endless belt 14 in between. Provided, and the path length of the endless belt 14 is at the time of projection scouring (when the driven roller 13 is positioned at the upper position as a placement position for placing the scoured part on the scoured part placing part 15), At the time of discharge (when the driven roller 13 is positioned at the lower position as the discharge position for discharging the part to be cleaned from the part to be cleaned), it is not substantially changed and is always substantially equal. The endless belt 14 is prevented from bending so as to have a path length, and the endless belt 14 is kept in a tension state.

  Next, the effect of the shot blasting apparatus 1 according to the present invention will be described. First, an outline of a method for making the path lengths of the endless belt 14 substantially equal will be described. As shown in FIG. 9A, when the driven roller 13 is located at the upper position (during projection cleaning), the endless belt 14 is viewed from the side in the longitudinal direction, that is, the side drum 16 side, that is, the auxiliary tension roller. Curved toward the to-be-cleaned part mounting portion 15 side opposite to the contact surface of 37, the auxiliary tension roller 37 side forms a strained path. Further, as shown in FIG. 9B, when the driven roller 13 is in the lower position (when discharged), the axis of the driven roller 13 is positioned slightly below the axis of the auxiliary roller 19. The endless belt 14 is in a tensioned state in which the surface stretched between the auxiliary roller 19 and the driven roller 13 is almost parallel or the driven roller 13 side is positioned below and between the driven roller 13 and the tension roller 12. The endless belt 14 is brought into contact with an auxiliary tension roller 37 located behind the driven roller 13 provided on the end of the driven roller 13 to form a path of the endless belt 14 curved toward the auxiliary tension roller 37 side. For this reason, the path length of the endless belt 14 is not substantially changed between when the driven roller 13 is positioned at the upper position (when the projection is cleaned) and when the driven roller 13 is positioned at the lower position (when discharging). The substantially equal path length can be taken and the endless belt 14 can be prevented from bending.

  Normally, the endless belt 14 does not bend when the driven roller 13 is in the upper position. However, when the endless belt 14 is bent, the auxiliary roller 19 is connected via a drive rod 31 that is actuated by a driving device. The deflection of the endless belt 14 can be adjusted by actuating the pivotable arm 32 coupled to the auxiliary roller 19 and moving the driven roller 13 via the coupling arm 20 coupled to the auxiliary roller 19. In addition, the tension roller 12 can be adjusted by an adjusting unit that adjusts the tension state of the endless belt 14.

  Further, a pair of side drums 16 are provided between the tension roller 12 and the driven roller 13 so as to come into contact with both end edges of the endless belt 14 that rotates and travels with respect to both end edges of the endless belt 14. It is preferable to apply a pressing force in the intersecting direction so as to restrict both end edges of the endless belt 14 that is in contact with the side drum 16 and prevent the endless belt 14 from meandering.

  In the shot blasting apparatus 1 according to the present embodiment, the scouring material falling through the discharge hole 41 of the endless belt 14 is collected in a recovery unit disposed below the endless belt 14 that rotates and is scoured. The bucket 6 of the bucket conveyor that rotates and moves from the lower part to the upper part provided in the conveying unit 3 is lifted to the upper part of the abrasive conveying unit 3 provided in the cabinet 2, and the abrasive transport pipe 4 Is sent to the abrasive material projection unit 5 via the, and used for projection.

  Further, the shot blasting apparatus 1 according to the present embodiment is provided with a guide plate 34 on the connecting arm 20 that connects the driven roller 13 and the auxiliary roller 19, so that the driven roller 13 is at the lower position when discharging. It is possible to prevent the parts to be cleaned from leaking and falling from both sides of the endless belt 14 in the width direction, and to efficiently discharge the parts to be cleaned.

  Next, the effect by having comprised the auxiliary | assistant tension roller 37 so that inclination is possible is demonstrated. In the shot blasting apparatus 1, the endless belt 14 is formed by abutting the end portions of the belt with each other and joining them by an arbitrary method such as adhesion. In the endless belt 14 thus formed, the circumferential length on one side in the width direction of the endless belt 14 may be different from the circumferential length on the other side in the width direction. That is, the endless belt 14 according to the present embodiment is formed by cutting out a belt-shaped body having a predetermined length from a long body, and then abutting and joining the ends of the belt-shaped body. Therefore, when cutting out the belt molded body, it is not cut so that the side in the direction perpendicular to the longitudinal direction formed at the end of the belt molded body is perpendicular to the side in the longitudinal direction of the belt molded body. When the endless belt 14 is formed by abutting the end portions, the circumferential length on one side in the width direction of the endless belt 14 and the circumferential length on the other side in the width direction may not be the same and may be different. .

  As described above, when the endless belt 14 having different circumferential lengths on the one side and the other side in the width direction is stretched as it is, the magnitude of the applied tension is not the same on the one side and the other side in the width direction. A large amount of force acts, and in particular, a phenomenon occurs in which the endless belt 14 is biased in the width direction or meanders during reverse rotation. In this case, in the shot blasting apparatus 1 according to the present embodiment, the tilt of the auxiliary tension roller 37 is tilted by a predetermined angle by the tilt adjusting mechanism 21, whereby the tension applied to the endless belt 14 varies, that is, the width of the endless belt 14. It is possible to eliminate the difference between the magnitude of the tension applied to one side in the direction and the magnitude of the tension applied to the other side in the width direction, and to adjust the magnitudes of these tensions to be the same. Therefore, in the shot blasting apparatus 1 according to the present embodiment, the endless belt 14 can be stably rotated without being biased or meandering in the width direction.

  In this embodiment, an example in which the tilt adjusting structure 21 is provided as a configuration for tilting the auxiliary roller 19 and the movable plate sliding device 24 configuring the tilt adjusting structure 21 is configured by a bolt and a nut. However, the movable plate sliding device 24 is not limited to this as long as the auxiliary tension roller 37 can be inclined, and may have another configuration as described above. For example, the movable plate sliding device 24 may be configured to incline the auxiliary tension roller 37 using a driving device such as an air cylinder, or may be configured to incline the auxiliary tension roller 37 in other configurations. May be.

  Next, another embodiment of the shot blasting apparatus 1 according to the present invention will be described. In the description of the other embodiments, description of the same parts as those described above will be omitted. In this embodiment, the configuration of the drive roller 51 is different from the configuration described above. As shown in FIG. 10, the driving roller 51 of this embodiment has a roller main body 52 whose outer peripheral surface is in contact with the endless belt 14 and both ends of the roller main body 52, and has an outer diameter that is greater than the outer diameter of the roller main body 52. And a large flange portion 53. When the driving roller 51 is rotated by a driving device (not shown), the endless belt 14 that is in contact with the outer peripheral surface of the roller body 52 starts rotating. At this time, in the shot blasting apparatus 1 of this embodiment, when the endless belt 14 tries to move in the width direction, the lateral movement is restricted by the side surface of the large-diameter flange portion 53 of the drive roller 51. Therefore, it is possible to more effectively prevent the endless belt 14 from being biased in the width direction and meandering.

  The shot blasting apparatus according to the present invention has been described in detail above. However, the shot blasting apparatus described in this specification is merely an example of the shot blasting apparatus according to the present invention, and may be appropriately selected without departing from the scope of the present invention. Can be changed.

DESCRIPTION OF SYMBOLS 1 Shot blasting apparatus 11 Drive roller 12 Tension roller 13 Driven roller 14 Endless belt 15 Ejected parts mounting part 16 Side drum 17 Side plate 18 Feed roller 19 Auxiliary roller 21 Inclination adjustment structure 22 Movable plate 23 Bearing member 24 Movable plate sliding Device 25 Bearing body 25a Shaft insertion hole 26 Base portion 27 First fixing portion 28 Second fixing portion 29 Connection portion 30 Driving device 37 Auxiliary tension roller 51 Driving roller 52 Roller body 53 Flange portion

Claims (5)

cabinet,
At least a driving roller, a tension roller and a driven roller pivotally supported by the cabinet;
An endless belt having a predetermined width, which is stretched between the rollers and rotates.
Each of the cabinets is pivotally supported, abuts against the endless belt with a predetermined circumference, and is placed on the endless belt and between the drive roller and the driven roller to be polished. A pair of side drums forming a component placement section;
An auxiliary tension roller that applies a predetermined tension to the endless belt, an auxiliary roller that is provided below the side drum via the endless belt, supports the endless belt, and interlocks with the driven roller, and the driven roller And an arm mounted between the auxiliary rollers,
By the operation of the auxiliary roller, the driven roller is movable between the mounting position for mounting the polished part and the discharging position for discharging the cleaned part via the arm. , The widthwise front edge of the driven roller is lifted to a position where the contact start point of the endless belt and the side drum is above the dropping point of the to-be-cleaned component to be stirred, Lower the front edge,
The abraded parts put into the abraded part mounting part are abraded while being agitated by an endless belt that rotates and rotates in the forward rotation direction, and the endless belt is rotated in the reverse direction to be abraded. A shot blasting device configured to be able to discharge a part to be cleaned from an edge side of the endless belt on the driven roller side,
A tilt adjusting structure for adjusting the tilt in the width direction of the endless belt, the tilt adjusting structure including a movable plate slidable with respect to the cabinet, and a driving device for sliding the movable plate, and the auxiliary tension roller; The shot blasting apparatus is characterized by adjusting the inclination of the endless belt supported by the auxiliary tension roller that is supported by the movable plate and moves through the movable plate that is slid by driving of the driving device. The inclination adjusting structure has a first fixing portion for fixing one end portion to the cabinet and a second fixing portion for fixing the other end portion to the movable plate, and between the first fixing portion and the second fixing portion. And a movable plate sliding device comprising a connecting member that moves relative to the first fixed portion, and the movable plate pivotally supports the shaft end of the auxiliary tension roller. The movable plate slides together with the second fixed portion by driving the sliding device of the sliding plate, and is supported by the bearing member disposed on the movable plate. The shot blasting apparatus according to claim 1, wherein the tilting angle of the auxiliary tension roller with respect to the width direction of the endless belt is adjusted by moving the auxiliary tension roller.   The shot blasting device according to claim 2, wherein the first fixed portion and the second fixed portion of the movable plate sliding device include a bracket and a nut, and the continuous member is formed of a screw-like member that is screwed to the nut.   The shot blasting device according to claim 1, wherein a driving device including a driving rod for driving the driven roller between the placement position and the discharge position via the arm is connected to the auxiliary roller.   The driving roller includes a roller body, a support shaft protruding from the roller end, and a pair of flanges provided at both ends of the roller body. The endless belt has a side edge of the endless belt facing the flange. 2. The side edge portion of the endless belt abuts against the inner side surface of the flange and repairs the deviation when the endless belt traveling in an abuttable manner on the inner side surface is biased in the width direction. Shot blasting equipment.

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