JP2012020372A - Shot material projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shot material projection device capable of reducing the size and cost thereof.SOLUTION: The shot material projection device 10 includes a table 38 supporting a workpiece 12 and rotated by receiving rotational force, a projection unit 16 performing shot blast or shot-peening treatment to the workpiece 12 by projecting shot material 29 to the workpiece 12, a bucket elevator 68 driven by receiving the rotational force and conveying the shot material 29 such that the shot material 29 projected from the projection unit 16 and collected in a collection part 48 is returned to the projection unit 16, and a common motor 114 applying the rotational force to the table 38 and the bucket elevator 68.

Description

  The present invention relates to a shot material projection apparatus.

  Patent Document 1 discloses a shot blasting device including a rotating plate that supports a workpiece, a centrifugal projector that projects a shot material onto the workpiece, and a bucket elevator that conveys the collected shot material to the centrifugal projector. Has been.

JP 2005-329482 A

  However, in the example described in Patent Document 1, a motor for rotating the rotation plate and a motor for driving the bucket elevator are separately provided. Therefore, since the number of motors and accompanying parts increases, the apparatus becomes larger and the cost increases.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a shot material projection device that can be reduced in size and cost.

  In order to solve the above-mentioned problem, the shot material projection device according to claim 1 is configured to be capable of supporting a workpiece, and is configured to project a shot material onto the workpiece, a rotation support member that is rotated by receiving a rotational force A shot unit for shot blasting or shot peening the workpiece, and the shot material driven by rotational force and shot and collected from the projection unit to be returned to the projection unit. And a common motor for applying a rotational force to the rotation support member and the conveyance mechanism.

  According to this shot material projection device, the rotation of the rotation support member that supports the workpiece and the drive of the conveyance mechanism that conveys the shot material are linked by a common motor. Therefore, since the number of motors and the components associated therewith can be reduced, the size and cost can be reduced.

  The shot material projection device according to claim 2 is configured such that, in the shot material projection device according to claim 1, the rotation support member is disposed on the opposite side to the projection unit sandwiching the transport mechanism. Yes.

  According to this shot material projection device, the rotation support member is disposed on the opposite side of the projection unit with the transport mechanism interposed therebetween. Accordingly, it is possible to secure a projection distance between the projection unit and the workpiece while realizing miniaturization of the apparatus.

  The shot material projection device according to claim 3 is the shot material projection device according to claim 2, wherein the transport mechanism is rotated by receiving a rotational force, and an inside thereof is projected from the projection unit onto the workpiece. An endless belt that is a projection path of the shot material to be shot, and a plurality of buckets that are arranged side by side in the circumferential direction of the endless belt and attached to the endless belt, and convey the shot material. Yes.

  According to this shot material projection device, the space inside the endless belt can be effectively utilized as the shot material projection path, and therefore, the size can be further reduced.

  A shot material projection device according to a fourth aspect is the shot material projection device according to the first aspect, wherein the rotation support member is disposed between the transport mechanism and the projection unit.

  According to this shot material projection device, the rotation support member is disposed between the transport mechanism and the projection unit. Therefore, it is possible to reduce the projection distance between the projection unit and the workpiece while realizing downsizing of the apparatus.

  As described above in detail, according to the present invention, the shot material projection apparatus can be reduced in size and cost.

It is a side view including the partial cross section of the shot material projection device concerning one embodiment of the present invention. It is a front view of the shot material projection apparatus shown by FIG. It is a front view of the conveyance unit shown by FIG. It is a principal part enlarged view of the peripheral part of the driven pulley shown by FIG. It is a principal part enlarged view of the upper part of the conveyance unit shown by FIG. FIG. 6 is an enlarged front sectional view of a main part of the transport unit shown in FIG. 5. It is side surface sectional drawing of a driven pulley and a bucket shown by FIG. It is a side view including the partial cross section which shows the modification of the shot material projection apparatus which concerns on one Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described.

  A shot material projection apparatus 10 according to one embodiment of the present invention shown in FIG. 1 is for subjecting a workpiece 12 to shot blasting or shot peening, and includes a housing 14, a projection unit 16, and a table mechanism 18. And a work pressing mechanism 20, a transport unit 22, and a motor drive mechanism 24.

  The projection unit 16 is provided on a side wall 66C of a cabinet 66 that constitutes a transport unit 22 described later. As an example, the projection unit 16 is a centrifugal type, and includes a motor unit 26 and an impeller unit 28. An impeller 30 that is rotated by the motor unit 26 and projects the shot material 29 toward the workpiece 12 by centrifugal force is housed inside the impeller unit 28. In addition, various forms and materials can be used as the shot material.

  The table mechanism 18 includes a case 32, a bearing 34, a shaft 36, and a table 38. A hole 40 is formed in the central portion in the vertical direction of the side wall 32A of the case 32, the vertical wall 14A provided inside the housing 14, and the side wall 66B of the cabinet 66, and faces the side wall 66B. A hole 42 is formed on the side wall 66 </ b> C of the cabinet 66 coaxially with the hole 40.

  The holes 40 and 42 are formed so as to be positioned inside an endless belt 76 which will be described later when viewed in the projection direction (arrow A direction) of the shot material 29 by the projection unit 16. Further, the hole 40 and the hole 42 are communicated with each other by a pipe 44 inserted inside the endless belt 76. In the shot material projecting apparatus 10, the shot material 29 is projected from the projection unit 16 onto the work 12 through the pipe 44. That is, the inner side of the endless belt 76 is a projection path for the shot material projected from the projection unit 16 onto the workpiece 12.

  The shaft 36 is provided coaxially with the table 38 and is fixed to the lower end portion of the table 38 so as to be integrally rotatable. The shaft 36 extends in a direction orthogonal to the projection direction of the shot material 29 by the projection unit 16 (in this case, the vertical direction of the apparatus), and is rotatably supported by the case 32 via a bearing 34.

  The table 38 is accommodated inside the case 32, and is disposed on the opposite side of the projection unit 16 with a conveyance unit 22 (bucket elevator 68) described later interposed therebetween. The table 38 is formed with a support portion 38A (upper wall portion) for supporting the workpiece 12 on the side (upper side) opposite to the side where the shaft 36 is provided. The support portion 38A is positioned relative to the projection unit 16 so that the shot material 29 is projected onto the workpiece 12 from the outside in the radial direction of the workpiece 12 when the workpiece 12 is supported by the support portion 38A. Is set.

  In addition, the lower wall portion 32B of the case 32 is configured as a chute that is inclined so as to face the conveyance unit 22 side, and the shot material that has dropped from the upper side of the table 38 is separated from the side wall portion 32A, the vertical wall 14A, and In addition, it is configured to guide to a collection unit 48 provided in the lower part of the transport unit 22 through a communication hole 46 formed in the lower part of the side wall part 66B.

  The work pressing mechanism 20 includes a cylinder 50, a bearing 52, a shaft 54, and a pressing portion 56. The cylinder 50 has a main body portion 58 fixed to the housing 14 and a movable portion 60 slidable in the axial direction with respect to the main body portion 58, and the shaft 54 is pressed toward the table 38 by the movable portion 60. It is supposed to be configured.

  The shaft 54 is rotatably supported by the movable part 60 via the bearing 52. The shaft 54 is provided coaxially with the table 38, and one end thereof is inserted into a through hole 62 formed in the lateral wall 14 </ b> B provided inside the housing 14 and the upper wall portion 32 </ b> C of the case 32. And disposed inside the case 32. A seal member 64 is provided around the through hole 62, and the seal performance of the through hole 62 is ensured by the seal member 64. Further, the presser portion 56 is formed to have a larger diameter than the shaft 54 and is fixed to the tip portion of the shaft 54.

  The transport unit 22 includes a cabinet 66, a bucket elevator 68, and a tension adjustment mechanism 70. The bucket elevator 68 is housed inside the cabinet 66 and includes a driving pulley 72, a driven pulley 74, an endless belt 76, and a plurality of buckets 78.

  The drive pulley 72 is disposed in the lower portion of the cabinet 66 and is fixed to a shaft 120 provided in a motor 114 described later so as to be integrally rotatable. On the other hand, the driven pulley 74 is separated from the drive pulley 72 in the rotational axis direction (in this case, the vertical direction) of the table 38 described above, and is disposed at the upper portion of the cabinet 66. The driven pulley 74 is rotatably supported by a shaft portion 80 disposed in parallel with the shaft 120. As shown in FIG. 4, the shaft portion 80 is fixed to a support plate 112 that constitutes a tension adjusting mechanism 70 described later.

  As shown in FIG. 1, the endless belt 76 is wound around a drive pulley 72 and a driven pulley 74, and a plurality of buckets 78 are arranged side by side in the circumferential direction of the endless belt 76 and attached to the endless belt 76. It has been. More specifically, as shown in FIG. 5, the plurality of buckets 78 includes first buckets 78 </ b> A and second buckets 78 </ b> B arranged alternately in the circumferential direction of the endless belt 76.

  As shown in FIGS. 5 and 6, the first bucket 78 </ b> A includes a bottom portion 82, a front wall portion 84 and a rear wall portion 86 provided before and after the bottom portion 82, and a pair provided on both sides of the bottom portion 82. The side wall 88 is formed in a concave shape as a whole. Similarly, the second bucket 78 </ b> B has a bottom portion 92, front wall portions 94 and rear wall portions 96 provided before and after the bottom portion 92, and a pair of side wall portions 98 provided on both sides of the bottom portion 92. In general, it is formed in a concave shape. And as FIG. 5 shows, the 1st bucket 78A and the 2nd bucket 78B are set as the structure which conveys this shot material 29 in the state in which the shot material 29 was deposited inside.

  As shown in FIG. 6, the side wall 98 of the second bucket 78B is disposed inside the side wall 88 of the first bucket 78A, and a part of the side wall 98 is adjacent to the front and rear of the first bucket 78A. A part of the portion 88 overlaps with the endless belt 76 in the circumferential direction. And by this, in this bucket elevator 68, it becomes the structure which prevents the shot material conveyed with the 1st bucket 78A and the 2nd bucket 78B from falling down to the side of the 1st bucket 78A and the 2nd bucket 78B. Yes.

  Further, as shown in FIG. 7, each bucket 78 is attached to an endless belt 76 by a bolt 100. A concave portion 102 for avoiding contact with the bolt 100 is formed on the outer peripheral surface of the driven pulley 74 at a position corresponding to the bolt 100. This prevents the outer peripheral surface of the driven pulley 74 from being worn by contact with the bolt 100.

  In addition, a plurality of leads 104 that are inclined with respect to the axial direction are erected on the inner peripheral surface of the driven pulley 74, and the shot material that has entered the driven pulley 74 is caused by the leads 104. It is set as the structure discharged | emitted outside with rotation. Further, a flange 106 extending in the radial direction is formed on both sides of the driven pulley 74, and the shift between the driven pulley 74 and the endless belt 76 is suppressed by the flange 106. Although not particularly shown, the drive pulley 72 shown in FIG. 1 has the same configuration.

  The cabinet 66 shown in FIG. 1 includes a box part 66A having an opening on the vertical wall 14A side and a side wall part 66B that closes the opening of the box part 66A. The side wall part 66B is fixed to the vertical wall 14A, and the box part 66A is rotatably supported by the side wall part 66B via a hinge (not shown) having a rotation shaft extending in the vertical direction. And this box part 66A can turn to the side (arrow B side) spaced apart from 14 A of vertical walls centering on this hinge. In the transport unit 22, the endless belt 76, the driving pulley 72, and the driven pulley, which are consumables, are opened through the opening of the box portion 66A in a state where the box portion 66A is rotated to the side away from the vertical wall 14A. 74, bucket 78, etc. can be exchanged.

  Further, as shown in FIGS. 2 and 3, a separator 108 is provided on the side of the upper portion of the bucket elevator 68. The separator 108 sucks dust and fine projection material. In this shot material projection device 10, the shot material 29 discharged from the upper part of the bucket elevator 68 (see FIG. 1) passes through the separator 108 and is returned to the projection unit 16.

  As shown in FIGS. 1 and 2, the tension adjusting mechanism 70 includes a damper 110 and a support plate 112. One end of the damper 110 is fixed to the side wall portion 66C of the cabinet 66, and the other end of the damper 110 is fixed to the support plate 112. The support plate 112 is fixed to the side wall portion 66C of the cabinet 66 so as to be movable in the vertical direction. In this shot material projection device 10, when the support plate 112 is pressed upward by the damper 110, a pressing force acts on the driven pulley 74 shown in FIG. 1 in a direction away from the drive pulley 72. As a result, tension is applied to the endless belt 76.

  The motor drive mechanism 24 includes a motor 114 and gears 116 and 118. The motor 114 is fixed to the side wall portion 66 </ b> C and has a shaft 120. The shaft 120 is disposed in parallel with the projection direction of the shot material 29 by the projection unit 16 and penetrates the cabinet 66.

  The gears 116 and 118 are each constituted by a bevel gear. The gear 116 is provided coaxially with the shaft 36 and is fixed to the lower end portion of the table 38 so as to be integrally rotatable. On the other hand, the gear 118 is fixed to the tip end of the shaft 120 so as to be integrally rotatable, and meshed with the gear 116 described above.

  The table 38 corresponds to the rotation support member in the present invention, and the bucket elevator 68 corresponds to the transport mechanism. The motor 114 is a common motor that applies a rotational force to the table 38 and the bucket elevator 68.

  Next, the operation of the above-described shot material projection apparatus 10 will be described.

  First, the workpiece 12 is supported on the support portion 38A of the table 38 shown in FIG. Subsequently, when the shaft 54 is pressed toward the table 38 by the cylinder 50, the work 12 is pressed against the support portion 38 </ b> A by the pressing portion 56. As a result, the workpiece 12 and the table 38 can be rotated together.

  Subsequently, in this state, the motor 114 is driven. When the motor 114 is driven, the gear 118 is rotated together with the shaft 120, and the shaft 36 is rotated together with the gear 116 meshed with the gear 118. Then, the workpiece 12 is rotated together with the table 38 by receiving this rotational force. At this time, the shot material 29 is projected from the projection unit 16 onto the workpiece 12. Thereby, the workpiece 12 is shot blasted or shot peened.

  As described above, when the motor 114 is driven and the shaft 120 is rotated, the bucket elevator 68 is driven by receiving this rotational force. That is, when the drive pulley 72 is rotated, the endless belt 76 is rotated by receiving this rotational force, and the plurality of buckets 78 are circulated. Thus, the shot material 29 collected by the collection unit 48 is conveyed to the upper part of the bucket elevator 68 by the plurality of buckets 78.

  In the upper part of the bucket elevator 68, as shown in FIG. 5, as the endless belt 76 rotates, the bucket 78 changes from a state facing upward to a state facing sideways, and then changed to a state facing downward. The Further, the shot material 29 inside the bucket 78 is discharged while the bucket 78 is changed from the side facing side to the state facing downward.

  When the shot material 29 is discharged from the bucket 78, the shot material 29 is guided to the back surface of the bottom portion (in this case, the bottom portion 82) of the bucket 78 immediately before the bucket 78 that discharged the shot material 29 and to the guide member 121. And discharged to the discharge unit 122. The shot material 29 discharged to the discharge unit 122 is returned to the projection unit 16 shown in FIGS. 1 and 2 after passing through the separator 108 shown in FIGS.

  Next, the operation and effect of one embodiment of the present invention will be described.

  According to the shot material projection apparatus 10 according to an embodiment of the present invention, as shown in FIG. 1, the rotation of the table 38 that supports the workpiece 12 and the drive of the bucket elevator 68 that conveys the shot material 29 are common. The motor 114 is interlocked. Therefore, since the number of motors and parts (for example, bearings) associated therewith can be reduced, the size and cost can be reduced. Further, since the power consumption can be reduced by reducing the number of motors, the running cost can also be reduced.

  Moreover, the table 38 is disposed on the opposite side of the projection unit 16 with the transport unit 22 (bucket elevator 68) interposed therebetween. Therefore, the projection distance between the projection unit 16 and the workpiece 12 can be ensured while realizing downsizing of the apparatus.

  Further, since the space inside the endless belt 76 can be effectively used as the projection path of the shot material 29, the size can be further reduced.

  Next, a modification of one embodiment of the present invention will be described.

  In the above embodiment, the shot material projecting apparatus 10 is installed in a standing state so that the rotation axis of the table 38 coincides with the vertical direction. However, the shot material projecting apparatus 10 is lying so that the rotation axis of the table 38 coincides with the horizontal direction. You may install in the state where it was done.

  Further, although the tension adjusting mechanism 70 is provided on the driven pulley 74 side, it may be provided on the driving pulley 72 side. In this case, the collection unit 48 that receives the shot material 29 may be provided so as to be able to move integrally with the support plate 112 and the drive pulley 72 by a bracket or the like, for example.

  Moreover, although the projection unit 16 was made into the centrifugal type, it may be made into other formats, such as an air type which projects a shot material with an air pressure, for example.

  Further, the shot material projection apparatus 10 includes the bucket elevator 68 having the endless belt 76 and the plurality of buckets 78 as the transport mechanism for transporting the shot material 29, but may include other types of transport mechanisms. good.

  Moreover, although the shot material projection device 10 includes the table 38 on which the workpiece 12 is supported as a rotation support member that supports the workpiece 12, the shot material projection apparatus 10 may include a rotation support member that supports the workpiece 12 in other forms. good.

  In the shot material projection apparatus 10, the shot material 29 conveyed to the upper part of the bucket elevator 68 is configured to be reduced through a conveyance path having a separator or the like to the projection unit 16. The material 29 may be configured to be directly returned to the projection unit 16.

  The table 38 is disposed on the opposite side of the projection unit 16 with the conveyance unit 22 interposed therebetween, but is disposed between the conveyance unit 22 (bucket elevator 68) and the projection unit 16 as shown in FIG. May be.

  In the modification shown in FIG. 8, the shot material 29 is projected from the projection unit 16 onto the workpiece 12 through the projection holes 132 formed in the vertical wall 14 </ b> A and the side wall portion 32 </ b> D of the case. Further, a communication hole 136 is formed in the side wall portion 32A of the case 32, the side wall portion 14C of the housing 14, and the side wall portion 66B of the cabinet 66, and the shot material 29 that has dropped from the upper side of the table 38 is It is configured to be guided to a collection unit 48 provided at the lower part of the transport unit 22 through the communication hole 136. Further, the rotational force of the motor 114 is transmitted to the table 38 through the gears 116 and 118, and is transmitted to the drive pulley 72 through the gear 138 and the shaft 140 provided on the opposite side of the gear 118. It is configured.

  Even if configured in this way, the size and cost can be reduced as in the above-described embodiment.

  Further, since the table 38 is disposed between the bucket elevator 68 and the projection unit 16, the projection distance between the projection unit 16 and the workpiece 12 can be shortened while realizing downsizing of the apparatus.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

10 Shot Material Projecting Device 12 Work 16 Projection Unit 38 Table (Rotation Support Member)
68 Bucket elevator (conveyance mechanism)
76 Endless belt 78 Bucket 114 Motor (common motor)

Claims (4)

A rotation support member configured to be capable of supporting a workpiece and rotated by receiving a rotational force;
A projection unit that projects a shot material onto the workpiece and performs shot blasting or shot peening on the workpiece;
A transport mechanism that is driven by a rotational force and transports the shot material so that the shot material projected and collected from the projection unit is returned to the projection unit;
A common motor for applying a rotational force to the rotation support member and the transport mechanism;
A shot material projection device comprising: The rotation support member is disposed on the opposite side of the projection unit across the transport mechanism.
The shot material projection device according to claim 1. The transport mechanism is
An endless belt that is rotated by receiving a rotational force and whose inside is a projection path of a shot material projected from the projection unit onto the workpiece,
A plurality of buckets arranged side by side in the circumferential direction of the endless belt, attached to the endless belt, and transporting the shot material,
The shot material projection device according to claim 2. The rotation support member is disposed between the transport mechanism and the projection unit.
The shot material projection device according to claim 1.