JP5986023B2 - Barrel polishing equipment - Google Patents

Description

  The present invention relates to a barrel polishing apparatus.

  In Patent Document 1, a barrel tank in which an opening on the upper surface of a barrel body having a bottomed cylindrical shape is closed with a barrel lid is accommodated in a bottomed cylindrical barrel case, and the barrel tank and the barrel case are connected to a planet. A barrel polishing apparatus that performs polishing in a barrel tank by rotating it is disclosed. In this barrel polishing apparatus, a stopper is disposed in the vicinity of the upper portion of the barrel lid in order to prevent the barrel tank from jumping upward during rotation.

Japanese Patent No. 4189010

In the barrel polishing apparatus, as a means for fixing the barrel main body and the barrel lid in the assembled state, the flange portion on the outer periphery of the upper end portion of the barrel main body and the outer peripheral edge portion of the barrel lid are coupled by tightening bolts and nuts. It has become. The bolt fixing structure needs to be provided at a plurality of locations spaced in the circumferential direction. Therefore, both when fixing the barrel main body and the barrel lid and when removing the barrel lid from the barrel main body, it is necessary to perform a troublesome work of tightening or loosening a plurality of bolts.
The present invention has been completed based on the above-described circumstances, and an object thereof is to improve work when a barrel lid is attached to and detached from a barrel body.

The present invention
A barrel tank having a barrel body having a bottomed cylindrical shape, and a barrel lid detachable with respect to an opening on the upper surface of the barrel body;
By rotating the planet in a state in which the barrel tank is accommodated, a bottomed cylindrical barrel case that performs polishing in the barrel tank;
A stopper that is arranged in the vicinity of the upper portion of the barrel lid and suppresses the barrel tank from splashing upward during polishing,
An abutting portion that is provided on the upper surface of the barrel lid and abuts against the stopper when the barrel tank moves up;
A pair of bearings provided on the barrel body;
A clamp shaft that is arranged along the upper surface of the barrel lid and whose both ends are rotatably supported by the pair of bearings;
When the clamp shaft is in a fixed position, the barrel cover is fixed to the barrel body by pressing the upper surface of the barrel cover, and the clamp shaft is in the fixed release position. When there is an eccentric cam that retreats above the barrel lid and releases the pressure against the barrel lid,
It is characterized in that it is provided with a through hole formed in the abutting portion and rotatably penetrating the clamp shaft.

  When the clamp shaft is rotated to the fixed position and the upper surface of the barrel lid is pressed with the eccentric cam, the barrel lid is fixed to the barrel body. Further, the barrel cover can be removed from the barrel body by rotating the clamp shaft to the fixed release position to release the pressure applied to the barrel cover by the eccentric cam and extracting both ends of the clamp shaft from the bearing. By simply holding the lever and rotating the clamp shaft, the barrel lid can be fixed to and released from the barrel body, so that the workability is excellent.

Also, when the barrel lid is removed from the barrel body, the clamp shaft is penetrated through the through hole of the contact portion, so that the barrel lid removed from the barrel body and the clamp shaft can be kept in an integrated state. . According to this configuration, workability when attaching / detaching the barrel lid to / from the barrel body is better than when handling the barrel lid and the clamp shaft in a separated state.
In addition, since the abutment portion, which is a means for preventing the barrel tank from jumping during polishing, also has a function of integrating the clamp shaft with the barrel lid, the shape and structure of the upper surface of the barrel lid are simplified. be able to.

The top view of the state which accommodated the barrel polisher of Example 1 in the casing Cross section of barrel polishing equipment Top view showing the barrel lid fixed to the barrel body Partial sectional view showing the state where the barrel lid is fixed to the barrel body Partial side view showing the barrel lid fixed to the barrel body Plan view showing the state where the barrel lid is fixed to the barrel body. Partial side view showing the state where the barrel cover is released from the barrel body Plan view showing the state where the clamp shaft is removed from the movable bearing and the movable bearing is tilted down Partial side view showing the state where the clamp shaft is removed from the movable bearing and the movable bearing is tilted down Top view of the barrel lid removed from the barrel body Sectional view of the barrel lid with the barrel removed Side view of the barrel lid with the barrel removed Top view of the barrel body with the barrel lid removed Top view of barrel case

The barrel polishing apparatus of the present invention is
You may provide the lever which has a pair of arm part which is provided in the said clamp shaft so that integral rotation is possible, and protrudes in radial direction from two positions which are the other side on both sides of the said contact part in an axial direction.
According to this configuration, even if the clamp shaft moves in the axial direction with respect to the contact portion, the clamp shaft does not come out of the through hole due to the arm portion interfering with the contact portion.

The barrel polishing apparatus of the present invention is
You may provide the holding part which comprises the said lever by making the substantially parallel with the axis line of the said clamp shaft, and connecting the protrusion ends of a pair of said arm part.
According to this structure, the operability at the time of rotating a clamp shaft becomes favorable by grasping | ascertaining the holding part which is substantially parallel to the axis line of a clamp shaft.

The barrel polishing apparatus of the present invention is
It is provided on the upper surface of the barrel lid with its axis line substantially parallel to the clamp shaft, and corresponds to both the unlocking position corresponding to only one of the pair of arm portions and the pair of arm portions. A lock pin that is displaceable in the axial direction between the lock position and
The lock pin is provided so as to surround the lock pin, and the lock pin can be urged to the lock position side. When the lock pin is in the lock position, only one arm portion of the pair of arm portions is provided. And a lock spring arranged in a region corresponding to
In a state where the lever is in the fixed position and the lock pin is in the lock position, the one arm portion is disposed closer to the lock release position than the lock pin and the lock spring, The other arm portion may be locked to the lock pin so that the lever is locked in a state in which displacement to the fixed release position side is restricted.
As a method of locking the lever at a fixed position, when both the pair of arm portions are locked to the lock pin, the lock spring fitted on the lock pin is positioned at a position that does not correspond to the pair of arm portions. Need to be placed in. In this case, since it is necessary to lengthen the lock pin by the length of the lock spring, a part of the lock pin or the lock pin may protrude outward from the barrel lid. On the other hand, with the above configuration, the lock spring is provided in a region corresponding to one arm portion and only the other arm portion is locked to the lock pin, so that the total length of the lock pin can be kept short. it can.

The barrel polishing apparatus of the present invention is
A regulating portion formed in the barrel case;
A locking portion that is provided on the outer periphery of the barrel tank and locks the barrel tank relative to the barrel case by locking the barrel tank in the state where the barrel tank is housed in the barrel case. You may have.
According to this configuration, it is possible to prevent poor polishing due to the relative rotation of the barrel tank within the barrel case.

<Example 1>
A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the barrel polishing apparatus A is accommodated in a casing 50, and the upper half of the casing 50 can be opened and closed by a cover plate 51 attached via a hinge. The barrel polishing apparatus A includes one revolution shaft 52, a turret 53, four rotation shafts 54, four barrel cases 55, four barrel tanks 10, and a pressing unit 60.

  As shown in FIG. 2, the revolution shaft 52 is housed in the casing 50 with the axis line directed in the vertical direction, and is rotated by a revolution motor (not shown). The turret 53 has a horizontal plate shape and is attached to the lower end portion of the revolution shaft 52 so as to rotate integrally. The four rotation shafts 54 are arranged at a pitch of 90 ° in the circumferential direction around the revolution shaft 52 and are supported so as to be relatively rotatable with respect to the turret 53 with the axis line directed in the vertical direction. The revolution shaft 52 and the four rotation shafts 54 are coupled so as to rotate together via a rotational force transmission mechanism (not shown) using a pulley and a belt. As a result, when the revolution shaft 52 and the turret 53 rotate integrally, the four barrel cases 55 and the rotation shaft 54 rotate together in the direction opposite to the revolution direction while revolving (turning) around the revolution shaft 52. It has become.

  Each barrel case 55 has a bottomed cylindrical shape whose upper end surface is opened over the entire region. The barrel case 55 is disposed above the turret 53 and mounted so as to rotate integrally with the rotation shaft 54 while being placed on the upper end portion of the rotation shaft 54. The barrel tank 10 is accommodated in the barrel case 55 so as to drop from above.

  As a means for restricting relative rotation of the barrel tank 10 in the barrel case 55, a pair of restricting portions 56 are provided at the barrel case 55 at an angular pitch of 180 ° in the circumferential direction as shown in FIGS. Is provided. The restricting portion 56 includes a restricting recess 57, a restricting plate 58, and a spacer 59. The restricting recess 57 is formed in a form that is cut out in a substantially square shape downward from the upper end edge of the cylindrical peripheral wall portion constituting the barrel case 55. A pair of restriction plates 58 each having a rectangular plate shape are attached to both side edges in the cutout region of the restriction recess 57 so as to protrude outward in a substantially radial direction. The pair of restricting plates 58 face each other in parallel, and block-like spacers 59 are attached to the opposing surfaces of the restricting plates 58, respectively.

  The barrel tank 10 is obtained by molding urethane resin with a mold, and as shown in FIG. 13, a bottomed rectangular tube barrel having a substantially regular hexagonal plan shape and an open top surface over the entire region. As shown in FIG. 12, the main body 11 includes a flat barrel lid 12 having a substantially circular planar shape. The barrel lid 12 is attached so as to close the opening on the upper surface of the barrel main body 11 and can be removed from the barrel main body 11.

  As shown in FIGS. 10 to 12, a contact portion 13 having a block shape is attached to a central position on the upper surface of the barrel lid 12. The contact portion 13 is formed with a through hole 26 penetrating in the left-right direction. The opening shape of the through-hole 26 is a gate shape whose upper end portion forms an arch shape, and is set to a dimension that allows a large-diameter portion 25 of the clamp shaft 22 described later to be relatively displaced in the vertical direction and the front-rear direction. In addition, a grip 14 for an operator to hold by hand is fixed at a position behind the contact portion 13 on the upper surface of the barrel lid 12. The barrel tank 10 accommodated in the barrel case 55 is planetarily rotated (self-revolving) integrally with the barrel case 55, and polishing is performed in the barrel tank 10 rotating on the planetary axis.

  The holding unit 60 is for preventing each barrel tank 10 from coming out of the barrel case 55 during polishing, and as shown in FIGS. 1 and 2, a base plate 61, four stoppers 62, and a pressing roller. 63 and a bolt 64 with a knob. The base plate 61 is supported so as to be able to rotate horizontally relative to the upper end portion of the revolution shaft 52. The four stoppers 62 are arm-shaped and extend radially from the base plate 61 at an angular pitch of 90 ° substantially horizontally. On the lower surface of the extended end portion of each stopper 62, a pressing roller 63 whose axis is directed in the vertical direction is attached to be freely rotatable. The height of the lower surface of the pressing roller 63 is set to a height that faces the upper surface of the contact portion 13 with a slight gap in a state where the barrel tank 10 is accommodated in the barrel case 55.

  The knob-equipped bolt 64 passes through the base plate 61 and is screwed coaxially with the revolution shaft 52. When the bolt 64 with knob is loosened, the stopper 62 can be rotated. Therefore, when the barrel tank 10 is attached to or detached from the barrel case 55, the stopper 62 is retracted to a position between the adjacent barrel cases 55. Good. When the barrel tank 10 is accommodated in the barrel case 55 for polishing, the stopper 62 is rotated so that the pressing roller 63 is made to correspond to the center portion of each barrel lid 12, and the bolt 64 with knob is tightened in this state. As a result, the stopper 62 is fixed so as to rotate integrally with the revolution shaft 52, and each pressing roller 63 is fixed at a position directly above the contact portion 13.

  When performing barrel polishing, the barrel tank 10 is taken out from the barrel case 55, the barrel lid 12 is removed from the barrel main body 11, and workpieces, polishing stones, water and a compound are put into the barrel main body 11. Thereafter, the barrel lid 12 is attached to the barrel main body 11 to close the opening on the upper surface of the barrel main body 11. The means for fixing the barrel lid 12 to the barrel body 11 will be described in detail later. In the barrel tank 10, the workpiece is polished by the rotation / revolution action of the barrel tank 10. At this time, the barrel tank 10 is subjected to the action of slight vibrations, and sometimes climbs up inside the barrel case 55 and tries to jump upward. When the barrel tank 10 is slightly lifted, the contact portion 13 is pressed by the pressing roller. Since it abuts against 63 from below, the upward movement of the barrel tank 10 is restricted. Therefore, the barrel tank 10 does not come out of the barrel case 55.

  Next, a fixing means for fixing the barrel lid 12 to the barrel body 11 will be described. The fixing means includes a clamp mechanism 15 and a lock mechanism 33. In the following description, for the sake of convenience, the vertical and horizontal directions are based on the directions shown in FIGS. 3 and 4, and the front and rear directions are defined as the lower side in FIG. 3 as the front side and the upper side as the rear side. To do.

  The clamp mechanism 15 includes the abutting portion 13 described above, a pair of left and right bearings 16 and 17 provided in the barrel main body 11, and a clamp shaft 22 provided in the barrel lid 12. A pair of left and right eccentric cams 27 and a lever 30 attached to the clamp shaft 22 are provided. The fixed bearing 16 positioned on the right side of the pair of bearings 16 and 17 has a plate surface and is fixed to the outer periphery of the upper end portion of the barrel main body 11 with the plate thickness direction facing the left-right direction. The fixed bearing 16 protrudes outward from the outer periphery of the barrel body 11. A shaft hole 20 penetrating in the left-right direction is formed at the upper end of the fixed bearing 16.

  The movable bearing 17 located on the left side of the pair of bearings 16 and 17 includes a base plate 18 and a movable plate 19. The base plate 18 has the same size in the front-rear direction as that of the fixed bearing 16 and is fixed to the outer periphery of the upper end of the barrel body 11 with the plate thickness direction facing left and right. Similar to the fixed bearing 16, the base plate 18 protrudes outward from the outer periphery of the barrel body 11. As shown in FIGS. 4 and 5, the movable plate 19 is in an upright posture (FIG. 5 to FIG. 7) and a tilted posture (see FIGS. 8 and 9). The movable plate 19 is formed with a shaft hole 20 having a shape that penetrates the position of the upper end portion in the standing posture to the left and right.

  As shown in FIGS. 3 and 4, the clamp shaft 22 is arranged along the upper surface of the barrel lid 12 with the axis line in the left-right direction. A pair of shaft portions 23L and 23R having a circular cross-sectional shape are formed coaxially at both left and right end portions of the clamp shaft 22. In the first embodiment, the centers of the shaft portions 23L and 23R are defined as the axis of the clamp shaft 22. The clamp shaft 22 is formed with a pair of coaxial mounting portions 24 having a circular cross-sectional shape adjacent to the pair of left and right shaft portions 23L and 23R. The pair of attachment portions 24 have a larger outer diameter than the shaft portions 23L and 23R, and are eccentric with respect to the axes of the shaft portions 23L and 23R.

  A region between the left and right mounting portions 24 of the clamp shaft 22 is a large-diameter portion 25 having a circular cross-sectional shape. The large diameter portion 25 has an outer diameter dimension larger than that of the attachment portion 24 and is coaxial with the attachment portion 24. The large-diameter portion 25 of the clamp shaft 22 can be relatively displaced in the left-right direction (axial direction) with respect to the through hole 26 of the contact portion 13 and can be relatively displaced by a predetermined dimension in the vertical direction and the front-rear direction. It is penetrated.

  Cylindrical eccentric cams 27 are fitted on the pair of attachment portions 24 so as to be relatively rotatable. The eccentric cam 27 is engaged with the stepped portion at the boundary between the attachment portion 24 and the large-diameter portion 25 and the other end is engaged with the retaining pin 28, so that the eccentric cam 27 is engaged with the clamp shaft 22. The relative displacement in the axial direction is restricted. The eccentric cam 27 is eccentric with respect to the shaft portions 23L and 23R (axis line of the clamp shaft 22). The pair of eccentric cams 27 are disposed at two positions on the opposite side with the contact portion 13 interposed therebetween. A pair of left and right pressure receiving plates 29 are attached to a region corresponding to the eccentric cam 27 on the upper surface of the barrel lid 12.

  As shown in FIG. 3, the lever 30 is a pair of left and right arms that protrude in a substantially radial direction intersecting the axis of the clamp shaft 22 from two positions on the opposite side of the large diameter portion 25 across the contact portion 13. The portions 31L and 31R and a grip portion 32 that is elongated in parallel with the clamp shaft 22 and connects the protruding end portions of the arm portions 31L and 31R. The first arm portion 31L (one arm portion recited in the claims) located on the left side (the side close to the movable bearing 17) of the pair of arm portions 31L and 31R includes the contact portion 13 and the left eccentric cam 27. The second arm portion 31R (the other arm portion recited in the claims) located on the right side (side closer to the fixed bearing 16) of the pair of arm portions 31L and 31R is in contact with the contact portion 13. It is located between the eccentric cam 27 on the right side. The clamp shaft 22 and the lever 30 can swing together between a fixed position (see FIGS. 3 to 5) and a fixed release position (see FIGS. 6 to 12).

  When the clamp shaft 22 is in the fixed position, the axis of the eccentric cam 27 is positioned below the axis of the shaft portions 23L and 23R (clamp shaft 22), and the lever 30 is positioned forward of the barrel cover 12 with respect to the clamp shaft 22. It falls to a low position close to the top surface. Further, when the clamp shaft 22 is in the unlocking position, the axis of the eccentric cam 27 is positioned above the axis of the shaft portions 23L and 23R, and the lever 30 stands obliquely rearward of the clamp shaft 22. Both arm portions 31L and 31R are in contact with the grip 14 obliquely from above.

  As shown in FIG. 5, when the clamp shaft 22 is in the fixed position, the first arm portion 31L located on the left side has a length when viewed from the side (a direction parallel to the axis of the clamp shaft 22). The central portion in the direction is bent in a mountain shape so as to protrude upward (in the swinging direction of the lever 30 from the fixed position toward the fixed release position). When viewed from the side (direction parallel to the axis of the clamp shaft 22), the second arm portion 31R located on the right side is fixed at the center in the length direction below (from the unlocking position in the swinging direction of the lever 30). It is bent in a valley shape that is recessed in the direction toward the position.

  The lock mechanism 33 has a function of locking the lever 30 and the clamp shaft 22 at a fixed position and releasing the lock. The lock mechanism 33 includes a pair of arm portions 31L and 31R constituting the lever 30 described above, a support member 34, a lock pin 40, and a lock spring 44.

  As shown in FIG. 3, the support member 34 is fixed at a position in front of the clamp shaft 22 on the upper surface of the barrel lid 12. The support member 34 includes a first support plate portion 35 rising from the left end portion at a right angle to the barrel lid 12, a second support plate portion 36 rising from the right end portion, and a third support plate portion 37 rising from a substantially central portion in the left-right direction. And. The first support plate portion 35 is located on the left side of the first arm portion 31L, the second support plate portion 36 is located on the right side of the second arm portion 31R, and the third support plate portion 37 is It is located so as to correspond to the space between the pair of arm portions 31L and 31R (contact portion 13). Each of the first to third support plate portions 35 to 37 is formed with a support hole 38 penetrating coaxially.

  The lock pin 40 is disposed with its axis line directed in the left-right direction (substantially parallel to the clamp shaft 22). A knob 41 having an outer diameter larger than the inner diameter of the support hole 38 is attached to the left end of the lock pin 40 so as to be integrally displaced. A spring receiving portion 42 having an outer diameter larger than the inner diameter of the support hole 38 is attached to a substantially central portion in the length direction of the lock pin 40 so as to be integrally displaced. The lock pin 40 is supported so as to be capable of relative displacement in the left-right direction (axial direction) by passing through the support hole 38. The knob 41 is disposed on the left side of the first support plate 35 at the left end, and the spring receiving portion 42 is disposed between the first support plate 35 and the center third support plate 37. .

  The lock spring 44 is a compression coil spring having a coil diameter larger than the inner diameter of the support hole 38, and is fitted on the lock pin 40 coaxially. The left end of the lock spring 44 elastically contacts the first support plate portion 35 from the right side, and the right end of the lock spring 44 elastically contacts the spring receiving portion 42 from the left side. The lock spring 44 urges the lock pin 40 in the locking direction. The lock pin 40 is always urged by the lock spring 44 to be in a fixed position (see FIGS. 3 and 4) which is the rightmost end of the moving stroke. ).

  In a state where the lock pin 40 is in the locked position, the spring receiving portion 42 comes into contact with the third support plate portion 37 from the left side by the bias of the lock spring 44, and the right end portion of the lock pin 40 is the second support member on the right side. It penetrates through the support hole 38 of the plate part 36. The right end region of the lock pin 40 is located between the second support plate portion 36 and the third support plate portion 37 as the lock function portion 43. In the left-right direction, the left first arm portion 31L of the pair of arm portions 31L, 31R corresponds to a part of the lock spring 44, but the right second arm portion 31R It is in a non-corresponding position off to the right.

  The lock pin 40 in the lock position is slid to the lock release position (see FIG. 6) to the left of the lock position by pulling the knob 41 against the urging force of the lock spring 44. be able to. In the state where the lock pin 40 is in the unlocked position, almost the entire area of the lock function part 43 of the lock pin 40 is retracted to the area between the first support plate part 35 and the third support plate part 37, and the second There is no lock pin 40 between the support plate portion 36 and the third support plate portion 37 except for the left end portion thereof. That is, in the left-right direction, the lock pin 40 is retracted outside the area corresponding to the second arm portion 31R.

  Next, the operation of the first embodiment will be described. When the barrel lid 12 is assembled and fixed to the barrel body 11, first, as shown in FIG. 9, the movable plate 19 of the movable bearing 17 is tilted and the clamp shaft 22 and the lever 30 are rotated to the fixed release position. The opening of the barrel body 11 is closed with the barrel lid 12. At this time, as shown in FIG. 8, the positioning recess 39 formed on the outer periphery of the barrel lid 12 is fitted to the fixed bearing 16, thereby positioning the barrel lid 12 and the barrel main body 11 in the circumferential direction and the clamp shaft 22. Is slid leftward so as not to interfere with the fixed bearing 16.

  Thereafter, as indicated by an arrow in FIG. 8, the clamp shaft 22 is slid rightward, and the right shaft portion 23 </ b> R is fitted into the shaft hole 20 of the fixed bearing 16 above the pressure receiving plate 29. Thereafter, as shown in FIG. 7, the movable plate 19 is erected and the clamp shaft 22 is slid to the left, and as shown in FIG. 6, the left shaft portion 23L is moved to the axis of the movable plate 19 (movable bearing 17). Fit into the hole 20. It should be noted that the right shaft portion 23 </ b> R maintains a state where it is fitted in the shaft hole 20 of the fixed bearing 16. Further, since the clamp shaft 22 and the lever 30 remain in the fixed release position, the eccentric cam 27 stands by at a non-contact position spaced upward from the pressure receiving plate 29 on the upper surface of the barrel lid 12.

  After fitting the shaft portions 23L and 23R at both ends of the clamp shaft 22 to the fixed bearing 16 and the movable bearing 17, as shown in FIG. 6, the knob 41 is picked to retract the lock pin 40 to the unlock position, In this state, the lever 32 and the clamp shaft 22 are rotated from the fixed release position to the fixed position by grasping the grip portion 32. In the process in which the clamp shaft 22 rotates to the fixed position side, the eccentric cam 27 gradually moves downward so as to approach the upper surface of the barrel lid 12, and the eccentric cam 27 contacts the pressure receiving plate 29 from above. Due to this contact action, a downward reaction force is generated from the bearings 16 and 17 and the barrel body 11 side to the clamp shaft 22 side at the contact positions of the bearings 16 and 17 and the shaft portions 23L and 23R, and this reaction force is eccentric. It acts as a downward pressing force on the barrel lid 12 via the cam 27 and the pressure receiving plate 29. As described above, the barrel lid 12 and the barrel main body 11 are fixed in the assembled state by the clamp mechanism 15.

  Then, after the lever 30 and the clamp shaft 22 reach the fixed position, the hand is released from the knob 41 and the lock pin 40 is returned to the lock position by the urging of the lock spring 44. When the lock pin 40 returns to the lock position, as shown in FIGS. 3 to 5, the lock function part 43 of the lock pin 40 is located near the upper part of the second arm part 31 </ b> R. In this state, even if the second arm portion 31R is displaced upward toward the fixing release position, the second arm portion 31R abuts against the lock function portion 43 when the second arm portion 31R is slightly moved upward. The locked state in which the swing of 30 to the fixed release position side and the rotation of the clamp shaft 22 to the fixed position side are prevented is obtained. The barrel lid 12 is locked in the assembled state with respect to the barrel main body 11 by the action of the lock mechanism 33 described above. As shown in FIGS. 3 and 5, the first arm portion 31 </ b> L is held in a non-contact state with the lock spring 44 at a position above the lock spring 44.

  Release of the fixation of the barrel lid 12 to the barrel body 11 is performed in the following procedure. First, as shown in FIG. 6, the lock pin 40 is slid from the lock position to the lock release position, and the lock function unit 43 is retracted to the position deviated to the left with respect to the second arm portion 31R. And in this state, the holding part 32 is grasped and the lever 30 and the clamp shaft 22 are rotated from the fixed position to the fixed release position side. With the rotation of the clamp shaft 22, the eccentric cam 27 is displaced upward so as to be separated from the pressure receiving plate 29 to release the pressure on the barrel lid 12, so that the fixation of the barrel lid 12 to the barrel body 11 is released. When the second arm portion 31R reaches a position higher than the lock pin 40 during the operation of the lever 30, it is only necessary to release the knob 41 and return the lock pin 40 to the lock position.

  After the clamp shaft 22 and the lever 30 are displaced to the fixed release position, as shown in FIG. 8, the clamp shaft 22 is once slid toward the fixed bearing 16 to move the left shaft portion 23 </ b> L to the movable bearing 17. The movable plate 19 is tilted down. Thereafter, the clamp shaft 22 is slid toward the movable bearing 17, and the right shaft portion 23 </ b> R is removed from the fixed bearing 16. After the clamp shaft 22 is removed from the pair of bearings 16 and 17, the barrel lid 12 can be removed from the barrel body 11 by grasping the grip 14 and lifting the barrel lid 12.

  The barrel polishing apparatus A of the first embodiment is arranged along a pair of bearings 16 and 17 provided on the barrel main body 11 and the upper surface of the barrel lid 12, and shaft portions 23 </ b> L and 23 </ b> R at both ends are a pair of bearings 16. , 17 and a clamp shaft 22 rotatably supported by the clamp shaft 22, and provided so as to be integrally rotatable with the clamp shaft 22. When the clamp shaft 22 is in a fixed position, the upper surface of the barrel lid 12 is pressed to remove the barrel lid 12 from the barrel. An eccentric cam 27 that is fixed to the main body 11 and retracts above the barrel lid 12 when the clamp shaft 22 is in the unlocking position to release the pressure on the barrel lid 12, and the clamp shaft 22 is integrally rotatable. And a lever 30 having a pair of arm portions 31L and 31R projecting in the radial direction.

  According to this configuration, the barrel cover 12 can be fixed to the barrel body 11 by rotating the clamp shaft 22 to the fixed position and pressing the upper surface of the barrel cover 12 with the eccentric cam 27. Further, when the clamp shaft 22 is rotated to the fixed release position to release the pressure on the barrel cover 12 by the eccentric cam 27 and both ends of the clamp shaft 22 are removed from the bearings 16 and 17, the barrel cover 12 is removed from the barrel body 11. Can be removed. As described above, the fixing means of the first embodiment can fix and release the barrel lid 12 with respect to the barrel main body 11 simply by operating the lever 30 and rotating the clamp shaft 22. Compared to the fixing means, it is excellent in workability.

  In addition, the barrel polishing apparatus A according to the first embodiment is rotated in a planetary manner in a state in which the barrel tank 10 is accommodated, so that the bottomed cylindrical barrel case 55 that performs polishing in the barrel tank 10 and the barrel lid 12 are used. The stopper 62 is arranged in the vicinity of the upper portion of the barrel lid 10 to prevent the barrel tank 10 from jumping upward during polishing, and the abutting portion is provided on the upper surface of the barrel lid 12 and contacts the stopper 62 when the barrel tank 10 moves up. 13, and the contact portion 13 is provided with a through hole 26 that allows the clamp shaft 22 to rotate therethrough.

  According to this configuration, when the barrel lid 12 is removed from the barrel main body 11, the clamp shaft 22 is penetrated through the through hole 26 of the contact portion 13, so the barrel lid 12 and the clamp shaft 22 removed from the barrel main body 11. Can be kept in an integrated state. Therefore, the barrel polishing apparatus A of the first embodiment has better workability when attaching / detaching the barrel lid 12 to / from the barrel body 11 than when handling the barrel lid 12 and the clamp shaft 22 in a separated state. . In addition, since the abutting portion 13 which is a means for preventing the barrel tank 10 from being bounced up during polishing also serves to integrate the clamp shaft 22 with the barrel lid 12, the shape of the upper surface of the barrel lid 12 and The structure is simplified.

  In addition, the pair of arm portions 31L and 31R constituting the lever 30 of the first embodiment protrudes in the radial direction from two positions on the opposite side of the clamp shaft 22 across the contact portion 13 in the axial direction. According to this configuration, even if the clamp shaft 22 moves in the axial direction with respect to the contact portion 13, the arm portions 31 </ b> L and 31 </ b> R interfere with the contact portion 13, so that the clamp shaft 22 comes out of the through hole 26. It is prevented.

  Further, the lever 30 is provided with a grip portion 32 that constitutes the lever 30 by being substantially parallel to the axis of the clamp shaft 22 and connecting the protruding ends of the pair of arm portions 31L and 31R. The technical significance of this configuration is as follows. Since both the position and the direction of the arm portions 31L and 31R projecting in the radial direction from the clamp shaft 22 change with the rotation of the clamp shaft 22, the clamp shaft 22 is rotated by grasping the arm portions 31L and 31R. The operability is not good. On the other hand, the gripping portion 32 that is substantially parallel to the axial direction of the clamp shaft 22 changes only with the position as the clamp shaft 22 rotates, and the direction thereof hardly changes. Therefore, when the clamp shaft 22 is rotated, the operability is better when the grip portion 32 is gripped than when the arm portions 31L and 31R are gripped.

  Moreover, the improvement in operability by grasping the grip portion 32 means that the projecting length of the arm portions 31L and 31R can be shortened as compared with the case where the arm portions 31L and 31R are gripped and rotated. Therefore, in the first embodiment, the projecting dimension of the lever 30 from the outer peripheral edge of the barrel lid 12 can also be shortened. 1 and 3, a non-interference area 45 concentric with the barrel tank 10 indicates a range in which the levers 30 of the adjacent barrel tanks 10 do not interfere with each other when the four barrel tanks 10 are planetarily rotated during polishing. Within the non-interference area 45, not only the lever 30 held at the fixed position but also the fixed bearing 16 and the movable bearing 17 projecting from the outer periphery of the barrel body 11 are accommodated.

  The barrel polishing apparatus A according to the first embodiment is provided on the upper surface of the barrel lid 12 with its axis line substantially parallel to the clamp shaft 22, and a lock corresponding to only the first arm portion 31L of the pair of arm portions 31L and 31R. The lock pin 40 that is displaceable in the axial direction between the release position and the lock position corresponding to both the pair of arm portions 31L and 31R, and the lock pin 40 is provided so as to surround the lock pin 40. A lock spring 44 is provided that can be biased toward the lock position and is disposed in a region corresponding to only the first arm portion 31L of the pair of arm portions 31L and 31R when the lock pin 40 is in the lock position. When the lever 30 is in the fixed position and the lock pin 40 is in the lock position, the first arm portion 31L is arranged closer to the lock release position than the lock pin 40 and the lock spring 44, and the first The lever 30 is locked in a state in which the displacement toward the fixed release position is restricted by the two arm portions 31R being engaged with the lock pin 40.

  The technical significance of this configuration is as follows. As a method of locking the lever 30 in the fixed position, when both the pair of arm portions 31L and 31R are structured to be locked to the lock pin 40, the lock spring 44 fitted on the lock pin 40 is used as the pair of arms. It is necessary to arrange the parts 31L and 31R at positions that do not correspond. In this case, since it is necessary to lengthen the lock pin 40 by the length dimension of the lock spring 44, a part of the lock pin 40 and the lock pin 40 protrude outward from the barrel lid 12, and further, the non-interference area 45 There is a risk of spilling outside. On the other hand, with the above configuration, the lock spring 44 is provided in a region corresponding to the first arm portion 31L and only the second arm portion 31R is engaged with the lock pin 40. Can be kept short. Therefore, as shown in FIG. 3, the lock pin 40 in the lock position is within the non-interference area 45.

  Further, in the barrel polishing apparatus A of the first embodiment, the barrel tank 10 is simply housed so as to be dropped into the barrel case 55, so that the barrel tank 10 is in the barrel case 55 during polishing. There is a risk of relative rotation in the interior. If the barrel tank 10 rotates relative to the barrel case 55, the rotation speed of the barrel tank 10 deviates from a predetermined speed, and there is a concern that good polishing cannot be performed. Therefore, in the first embodiment, the regulation portion 56 is formed in the barrel case 55, the bearings 16 and 17 are provided as locking portions on the outer periphery of the barrel tank 10, and the barrel tank 10 is accommodated in the barrel case 55. The bearings 16 and 17 are engaged with the restricting portion 56 and locked in the circumferential direction. In the fitted state, the lower end side region of the fixed bearing 16 and the base plate 18 of the movable bearing 17 are positioned so as to be sandwiched between the pair of spacers 59 in the circumferential direction. Thereby, since relative rotation with respect to the barrel case 55 of the barrel tank 10 is controlled, it is possible to prevent poor polishing due to relative rotation of the barrel tank 10 within the barrel case 55.

  Further, in the barrel polishing apparatus A of the first embodiment, the restricting portion 56 is formed by notching the opening edge at the upper end of the barrel case 55, and the bearings 16 and 17 (locking portions) protrude from the outer periphery of the barrel tank 10. I did it. According to this configuration, the bearings 16 and 17 can be locked to the restricting portion 56 only by housing the barrel tank 10 so as to be dropped into the barrel case 55, so that workability is good. Further, in the barrel polishing apparatus A of the first embodiment, in a state where the barrel tank 10 is accommodated in the barrel case 55, the bearings 16 and 17 function as a locking portion that is a relative rotation restricting unit of the barrel tank 10, and are regulated. It is locked to the portion 56. Thus, since the bearings 16 and 17 have a function as a locking portion, the shape of the barrel tank 10 can be simplified.

<Other embodiments>
The present invention is not limited to the first embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first embodiment, the pair of arm portions constituting the lever are arranged so as to sandwich the contact portion in the axial direction. However, only one arm portion constituting the lever may be provided. In this case, there may or may not be a gripping portion that is substantially parallel to the axis of the clamp shaft.
(2) In the first embodiment, the lock spring is arranged in a region corresponding to one arm portion in a state where the lock pin is in the lock position. However, the present invention is not limited thereto, and the lock pin is in the lock position. In this state, the lock spring may be arranged in a region that does not correspond to both of the pair of arm portions.
(3) In the first embodiment, the relative rotation of the barrel tank in the barrel case is restricted by the locking of the restriction portion provided in the barrel case and the locking portion provided in the barrel tank. May be configured to be relatively rotatable in the barrel case.

<Technical thought extracted from Example 1 (A)>
From the first embodiment, the following technical idea (invention) is extracted. In Patent Document 1 (Patent No. 4189010), a barrel tank in a form in which an opening on an upper surface of a barrel body having a bottomed cylindrical shape is closed with a barrel lid is accommodated in a bottomed cylindrical barrel case, A barrel polishing apparatus is disclosed that performs polishing in a barrel tank by rotating the barrel tank and the barrel case in a planetary manner.

  In this barrel polishing apparatus, as a means for fixing the barrel body and the barrel lid in an assembled state, the flange portion on the outer periphery of the upper end portion of the barrel body and the outer peripheral edge portion of the barrel lid are coupled by tightening bolts and nuts. It has become. The bolt fixing structure needs to be provided at a plurality of locations spaced in the circumferential direction. Therefore, both when fixing the barrel main body and the barrel lid and when removing the barrel lid from the barrel main body, it is necessary to perform a troublesome work of tightening or loosening a plurality of bolts. Therefore, a means for improving the work when the barrel lid is attached to and detached from the barrel body is desired.

As a means to solve this problem,
(1) The barrel polishing apparatus according to the extracted invention A is
A barrel body having a bottomed cylindrical shape, and a barrel lid that can be attached to and detached from the opening on the upper surface of the barrel body, and a barrel tank that performs polishing by rotating on a planet;
A pair of bearings provided on the barrel body;
A clamp shaft that is arranged along the upper surface of the barrel lid and whose both ends are rotatably supported by the pair of bearings;
When the clamp shaft is in a fixed position, the barrel cover is fixed to the barrel body by pressing the upper surface of the barrel cover, and the clamp shaft is in the fixed release position. When there is an eccentric cam that retreats above the barrel lid and releases the pressure against the barrel lid,
A lever having a pair of arm portions provided in the clamp shaft so as to be integrally rotatable and projecting in a radial direction;
It is provided on the upper surface of the barrel lid with its axis line substantially parallel to the clamp shaft, and corresponds to both the unlocking position corresponding to only one of the pair of arm portions and the pair of arm portions. A lock pin that is displaceable in the axial direction between the lock position and
The lock pin is provided so as to surround the lock pin, and the lock pin can be urged to the lock position side. When the lock pin is in the lock position, only one arm portion of the pair of arm portions is provided. And a lock spring arranged in a region corresponding to
In a state where the lever is in the fixed position and the lock pin is in the lock position, the one arm portion is disposed closer to the lock release position than the lock pin and the lock spring, The other arm portion is engaged with the lock pin, so that the lever is locked in a state in which displacement to the fixed release position side is restricted.

  According to this invention A, when the clamp shaft is rotated to the fixed position and the upper surface of the barrel lid is pressed by the eccentric cam, the barrel lid is fixed to the barrel body. Then, the barrel cover can be removed from the barrel body by rotating the clamp shaft to the fixed release position to release the pressure applied to the barrel cover by the eccentric cam and extracting both ends of the clamp shaft from the bearing. By simply holding the lever and rotating the clamp shaft, the barrel lid can be fixed to and released from the barrel body, so that the workability is excellent.

  In addition, as a method of locking the lever in the fixed position, when both of the pair of arm portions are locked to the lock pin, the lock spring fitted on the lock pin is not compatible with the pair of arm portions. It is necessary to arrange in the position. In this case, since it is necessary to lengthen the lock pin by the length of the lock spring, a part of the lock pin or the lock pin may protrude outward from the barrel lid. On the other hand, in the invention A, the lock spring is provided in the region corresponding to the one arm portion, and only the other arm portion is engaged with the lock pin, so that the entire length of the lock pin can be kept short.

(2) The barrel polishing apparatus of the invention A is
You may provide the holding part which comprises the said lever by making substantially parallel with the axis line of the said clamp shaft, and connecting the protrusion ends of a pair of said arm part.
According to this structure, the operability at the time of rotating a clamp shaft becomes favorable by grasping | ascertaining the holding part which is substantially parallel to the axis line of a clamp shaft.

(3) The barrel polishing apparatus of the invention A is
A bottomed cylindrical barrel case that rotates planetarily in a state in which the barrel tank is accommodated,
A stopper that is arranged in the vicinity of the upper portion of the barrel lid and suppresses the barrel tank from splashing upward during polishing,
An abutting portion that is provided on the upper surface of the barrel lid and abuts against the stopper when the barrel tank moves up;
A through hole that is formed in the contact portion and rotatably penetrates the clamp shaft may be provided.

  According to this configuration, since the clamp shaft is penetrated through the through hole of the abutting portion, the barrel lid removed from the barrel main body and the clamp shaft can be integrated. According to this configuration, workability when attaching / detaching the barrel lid to / from the barrel body is better than when handling the barrel lid and the clamp shaft in a separated state. In addition, the abutment part, which is a means for preventing the barrel tank from jumping during polishing, also serves to integrate the clamp shaft with the barrel lid, so the shape and structure of the upper surface of the barrel lid is simplified. ing.

(4) The barrel polishing apparatus of the invention A is
The pair of arm portions may be arranged at two positions on the opposite side across the contact portion in the axial direction.
According to this configuration, even if the clamp shaft moves in the axial direction with respect to the contact portion, the clamp shaft does not come out of the through hole due to the arm portion interfering with the contact portion.

<Examples included in Invention A>
(1) In the first embodiment, the pair of arm portions are connected by the grip portion. However, according to the invention A, the pair of arm portions may protrude in a cantilever manner.
(2) In the first embodiment, the relative rotation of the barrel tank in the barrel case is regulated by the locking of the regulating part provided in the barrel case and the locking part provided in the barrel tank. According to the present invention, the barrel tank may be configured to be relatively rotatable in the barrel case.
(3) In the first embodiment, the clamp shaft is passed through the through hole of the contact portion. However, according to the invention A, the clamp shaft may not penetrate the contact portion.
(4) In the first embodiment, the pair of arm portions are arranged at two positions on the opposite side across the contact portion. However, according to the invention A, the position where the pair of arm portions does not sandwich the contact portion. It may be arranged in a relationship.

<Technical thought (B) extracted from Example 1>
From the first embodiment, the following technical idea (invention) is extracted. In Patent Document 1 (Patent No. 4189010), a barrel tank in a form in which an opening on an upper surface of a barrel body having a bottomed cylindrical shape is closed with a barrel lid is accommodated in a bottomed cylindrical barrel case, A barrel polishing apparatus is disclosed that performs polishing in a barrel tank by rotating the barrel tank and the barrel case in a planetary manner. In this barrel polishing apparatus, a stopper is disposed in the vicinity of the upper portion of the barrel lid in order to prevent the barrel tank from jumping upward during rotation.

  In this barrel polishing apparatus, the barrel tank is simply housed in the barrel case so that the barrel tank may rotate relative to the barrel case during polishing. When the barrel tank rotates relative to the barrel case, the rotation speed of the barrel tank deviates from a predetermined speed, and there is a concern that good polishing cannot be performed. Therefore, it is desirable to provide a means for preventing the barrel tank from rotating relative to the barrel case.

As a means to solve this problem,
(1) The barrel polishing apparatus according to the extracted invention B is
A barrel tank having a barrel body having a bottomed cylindrical shape, and a barrel lid detachable with respect to an opening on the upper surface of the barrel body;
By rotating the planet in a state in which the barrel tank is accommodated, a bottomed cylindrical barrel case that performs polishing in the barrel tank;
A regulating portion formed in the barrel case;
A locking portion that is provided on the outer periphery of the barrel tank and locks the barrel tank relative to the barrel case by locking the barrel tank in the state where the barrel tank is housed in the barrel case. You may have.
According to the present invention B, since the relative rotation of the barrel tank in the barrel case is restricted by the locking portion of the barrel tank being locked to the restriction portion of the barrel case, the barrel tank is relatively rotated in the barrel case. It is possible to prevent poor polishing due to the occurrence.

(2) The barrel polishing apparatus of the invention B
The restricting portion is a form in which an opening edge at the upper end of the barrel case is cut out,
The latching part may protrude from the outer periphery of the barrel tank.
According to this configuration, if the barrel tank is housed so as to be dropped into the barrel case, the locking portion can be locked to the restricting portion, so that workability is good.

(3) The barrel polishing apparatus of the invention B is
A pair of bearings provided on the barrel body;
A clamp shaft that is arranged along the upper surface of the barrel lid and whose both ends are rotatably supported by the pair of bearings;
When the clamp shaft is in a fixed position, the barrel cover is fixed to the barrel body by pressing the upper surface of the barrel cover, and the clamp shaft is in the fixed release position. Sometimes with an eccentric cam that retreats above the barrel lid and releases the pressure on the barrel lid,
In a state where the barrel tank is housed in the barrel case, the bearing may be locked to the restricting portion as the locking portion.
According to this configuration, since the bearing also has a function as a locking portion, the barrel tank can be simplified in shape.

<Examples included in Invention B>
(1) In the said Example 1, although the control part was the form which notched the opening edge part of the upper end of a barrel case, according to invention B, the control part is the form which dented the inner periphery of the barrel case Or the form which protruded the inner periphery of the barrel case may be sufficient.
(2) In Example 1 described above, the locking portion protruded from the outer peripheral surface of the barrel tank. However, according to the invention B, the locking portion has a concave shape on the outer peripheral surface of the barrel tank. There may be.
(3) In the first embodiment, both of the pair of bearings are locked to the restricting portion as locking portions. However, according to the invention B, only one of the pair of bearings is locked. You may make it latch to a control part as a part.
(4) In the first embodiment, the number of the restricting portion and the engaging portion is a pair, but according to the invention B, the number of the restricting portion and the engaging portion may be one or three or more. But you can.
(5) In the first embodiment, the bearing functions as the locking portion. However, according to the invention B, a dedicated locking portion may be provided separately from the bearing.

A ... barrel polishing apparatus 10 ... barrel tank 11 ... barrel body 12 ... barrel lid 13 ... contact part 16 ... fixed bearing (locking part)
17 ... Movable bearing (locking part)
22 ... Clamp shaft 26 ... Through hole 27 ... Eccentric cam 30 ... Lever 31L ... First arm (one arm)
31R ... 2nd arm part (the other arm part)
32 ... Grasping part 40 ... Lock pin 44 ... Lock spring 55 ... Barrel case 56 ... Restricting part 62 ... Stopper

Claims (5)

A barrel tank having a barrel body having a bottomed cylindrical shape, and a barrel lid detachable with respect to an opening on the upper surface of the barrel body
By rotating the planet in a state in which the barrel tank is accommodated, a bottomed cylindrical barrel case that performs polishing in the barrel tank;
A stopper that is arranged in the vicinity of the upper portion of the barrel lid and suppresses the barrel tank from splashing upward during polishing,
An abutting portion that is provided on the upper surface of the barrel lid and abuts against the stopper when the barrel tank moves up;
A pair of bearings provided on the barrel body;
A clamp shaft that is arranged along the upper surface of the barrel lid and whose both ends are rotatably supported by the pair of bearings;
When the clamp shaft is in a fixed position, the barrel cover is fixed to the barrel body by pressing the upper surface of the barrel cover, and the clamp shaft is in the fixed release position. When there is an eccentric cam that retreats above the barrel lid and releases the pressure against the barrel lid,
A barrel polishing apparatus comprising: a through hole formed in the contact portion and rotatably penetrating the clamp shaft.   And a lever having a pair of arm portions that are provided on the clamp shaft so as to be integrally rotatable and project radially from two positions opposite to each other with the contact portion interposed therebetween in the axial direction. Item 1. A barrel polishing apparatus according to Item 1.   The barrel polishing apparatus according to claim 2, further comprising a grip portion that forms the lever by connecting the projecting ends of the pair of arm portions substantially parallel to the axis of the clamp shaft. It is provided on the upper surface of the barrel lid with its axis line substantially parallel to the clamp shaft, and corresponds to both the unlocking position corresponding to only one of the pair of arm portions and the pair of arm portions. A lock pin that is displaceable in the axial direction between the lock position and
The lock pin is provided so as to surround the lock pin, and the lock pin can be urged to the lock position side. When the lock pin is in the lock position, only one arm portion of the pair of arm portions is provided. And a lock spring arranged in a region corresponding to
In a state where the lever is in the fixed position and the lock pin is in the lock position, the one arm portion is disposed closer to the lock release position than the lock pin and the lock spring, 3. The lever according to claim 2, wherein the other arm portion is locked to the lock pin so that the lever is locked in a state in which displacement to the fixed release position is restricted. Item 4. A barrel polishing apparatus according to Item 3. A regulating portion formed in the barrel case;
A locking portion that is provided on the outer periphery of the barrel tank and locks the barrel tank relative to the barrel case by locking the barrel tank in the state where the barrel tank is housed in the barrel case. The barrel polishing apparatus according to claim 1, further comprising a barrel polishing apparatus.

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