Centrifugal barrel polishing machine

Description

Technical Field

[0001] The present invention relates to a centrifugal barrel polishing machine.

Background Art

[0002] Patent Document 1 discloses a configuration for attaching and detaching a barrel tank to and from a barrel tank case provided in a centrifugal barrel polishing apparatus.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The one in Patent Document 1 uses a barrel tank fixing member to fix the barrel tank to the barrel tank case. Since the centrifugal barrel polishing apparatus rotates the barrel tank case vigorously in a planetary motion around the rotation axis, it is necessary to surely prevent the barrel tank from falling off the barrel tank case during the operation of the centrifugal barrel polishing apparatus. For this reason, it is necessary to increase the rigidity of the barrel tank fixing member to eliminate the risk of deformation or breakage of the barrel tank fixing member. In this case, the barrel tank fixing member tends to be thick and heavy, and there is a concern that it will impose a burden on the operator who handles the barrel tank fixing member, which is not preferable.

[0005] The present invention has been completed based on the above circumstances, and an object thereof is to provide a technology capable of reducing the burden on an operator when handling a centrifugal barrel polishing machine.

Means for Solving the Problems

[0006] The centrifugal barrel polishing machine of the present invention a turret that is rotationally driven, and A case provided on the turret, positioned eccentrically from the rotation axis of the turret and rotating in a planetary pattern, A fixed object that is detachably fixed to the aforementioned case, A fixing member provided in the case, which is movable horizontally between a fixing position that allows the object to be fixed to the case, which is positioned at a predetermined position relative to the case, and a detachable position that allows the object to be attached to and detached from the case, It is equipped with. [Effects of the Invention]

[0007] Since the fixing member can be moved horizontally without the worker having to lift it, thereby displacing it between the fixed position and the detachable position, the burden on the worker can be reduced even if the fixing member is a sturdy, heavy object. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram of the centrifugal barrel polishing machine of Example 1. [Figure 2] This is a cross-sectional view of AA in Figure 1. [Figure 3] This is a plan view showing a case containing a barrel tank. [Figure 4] Figure 3 is a cross-sectional view of BB. [Figure 5] Figure 3 is a cross-sectional view of CC. [Figure 6] This is a partial side view showing the barrel tank housed in a position where the fixing members can be attached and detached. [Figure 7] This is a cross-sectional view of the DD in Figure 6. [Figure 8] This is a partial side view showing the barrel tank housed inside, with the fixing members positioned in their fixed locations and the set bolts tightened. [Figure 9] This corresponds to a magnified section of the end of the fixing member in Figure 5, showing the state in which the lowest end of the guide shaft is in contact with the lowest end of the through hole. [Figure 10] This is a schematic diagram of the centrifugal barrel polishing machine of Example 2. [Figure 11] This is a plan view showing the state in which the object to be fixed (lid) is fixed to the case (tank body) of Example 2. [Modes for carrying out the invention]

[0009] <Example 1> Hereinafter, an embodiment 1 of the present invention will be described with reference to Figures 1 to 9. In the following description, the up and down directions are defined as the front of the page in Figure 3 being up and the back being down. The left and right directions are defined as the directions shown in Figure 3 being left and right. The front and back directions are perpendicular to the up and down and left and right directions, and in Figure 3, the top is defined as the front and the bottom as the back.

[0010] As shown in Figures 1 and 2, the centrifugal barrel polishing machine 100 of Embodiment 1 comprises a pair of turrets 11, a plurality of cases 12, a plurality of fixing members 12D, and a plurality of barrel tanks 13 to be fixed. The centrifugal barrel polishing machine 100 is a device that polishes a workpiece (not shown) in a barrel tank 13 by rotating the case 12, which houses the barrel tank 13, planetarily around the rotation axis R of the turret 11.

[0011] [Turret Configuration] Each turret 11 is disc-shaped and rotates integrally with a rotation axis R whose axis is oriented in the left-right direction (horizontal direction). A pair of turrets 11 are spaced apart in the left-right direction. The rotation axis R extends in the left-right direction and penetrates each turret 11 in the thickness direction. The turrets 11 and the rotation axis R are rotationally driven by a motor for revolution (not shown).

[0012] [Case Configuration] As shown in FIGS. 3 and 4, each case 12 has a pair of side plate portions 12A, a pair of planetary shafts P, a pair of receiving plate portions 12B, a pair of guide shafts 12C, and a plurality of magnets 12F. The case 12 is provided on the turret 11 (see FIG. 1). The pair of side plate portions 12A are in a state where the plate thickness direction is oriented in the left-right direction and are arranged at a predetermined distance apart in the left-right direction.

[0013] The pair of planetary shafts P are provided so as to protrude outward in the left-right direction from each side plate portion 12A. The pair of planetary shafts P protrude parallel to the rotation axis R (see FIG. 1). The planetary shaft P is supported so as to be able to rotate relative to the turret 11 in a state of penetrating the turret 11 in the plate thickness direction of the turret 11.

[0014] The pair of receiving plate portions 12B extend in the left-right direction and are arranged so as to connect the pair of side plate portions 12A. The pair of receiving plate portions 12B are arranged such that the distance between them increases toward the upper end (see FIG. 4). A partition plate portion 12E is arranged so as to be spanned between the pair of receiving plate portions 12B (see FIG. 3). The partition plate portion 12E is fixed to the center portion in the left-right direction of each receiving plate portion 12B with the plate thickness direction oriented in the left-right direction.

[0015] The pair of guide shafts 12C are formed to extend in the left-right direction with a circular cross-sectional shape perpendicular to the axial direction. The guide shaft 12C has a function of guiding a fixing member 12D described later in the left-right direction (horizontal direction). Each guide shaft 12C is made of metal and is solid. Each guide shaft 12C is arranged one above each receiving plate portion 12B (see FIG. 4). The pair of guide shafts 12C extend parallel to the pair of planetary shafts P, and both ends thereof are fixed to each side plate portion 12A. A abutting member 12Q formed in a cylindrical shape and extending in the left-right direction is inserted and arranged at the center portion in the left-right direction of each guide shaft 12C (see FIG. 3). Each guide shaft 12C is fixed to the abutting member 12Q (see FIG. 7). The abutting member 12Q is fixed to the upper end portion of the receiving plate portion 12B.

[0016] Multiple magnets 12F are attached to each side plate portion 12A. These magnets 12F have the function of magnetically attaching to the fixing member 12D, which will be described later, and maintaining the position of the fixing member 12D. In one side plate portion 12A, the magnets 12F are arranged so that one magnet is adjacent to one guide shaft 12C. Each magnet 12F is arranged so as to be exposed on the inside in the left-right direction of each side plate portion 12A. The case 12 thus formed is positioned eccentrically from the rotation axis R between the pair of turrets 11 (see Figures 1 and 2).

[0017] [Configuration of fixing members] Multiple fixing members 12D are provided on the case 12. In Embodiment 1, two fixing members 12D are provided on one case 12 (see Figure 3). The fixing members 12D are required to have the function of magnetically attaching to the magnet 12F. For this reason, magnetic materials are used for the fixing members 12D. In addition, the fixing members 12D must be robust in order to fix the barrel tank 13, which will be described later, to the planetary rotating case 12. For this reason, metals such as iron are used for the fixing members 12D. Each fixing member 12D extends in the front-rear direction (up-down direction in Figure 3). Each fixing member 12D is stretched across a pair of guide shafts 12C (see Figure 3). The central part of each fixing member 12D in the front-rear direction (left-right direction in Figure 4) is formed to extend horizontally in the front-rear direction, and both ends in the front-rear direction are formed to slope downward toward the guide shafts 12C.

[0018] As shown in Figure 5, through holes 12G extending in the left-right direction are formed at both ends of each fixing member 12D in the front-rear direction. A guide shaft 12C is inserted through the through holes 12G of each fixing member 12D. Each through hole 12G is an elongated hole that is long in the vertical direction. Specifically, the vertical dimension of each through hole 12G is greater than the diameter of the guide shaft 12C. Also, the width dimension of each through hole 12G is slightly larger than the diameter of the guide shaft 12C.

[0019] Each fixed member 12D has multiple rotating members 12H. For example, known cam followers or the like can be used for the rotating members 12H. Each rotating member 12H is embedded in the fixed member 12D in a rotatable state and is arranged to be exposed in the through hole 12G. Two rotating members 12H are arranged in one through hole 12G. Viewed from the axial direction of the guide shaft 12C, in one through hole 12G, the two rotating members 12H are positioned at two locations on the circumferential direction of the guide shaft 12C (front and rear side), flanking the uppermost end of the guide shaft 12C, and are placed so as to contact the outer circumferential surface of the guide shaft 12C from above. This determines the front-rear relative position of the fixed member 12D with respect to the guide shaft 12C. In one through hole 12G, the two rotating members 12H are in contact with the upper half of the guide shaft 12C from above.

[0020] Viewed from above, the two rotating members 12H in one through-hole 12G are offset in the axial direction of the guide shaft 12C (see Figure 3). Also, viewed from above and the rear, the central axes of the two rotating members 12H in one through-hole 12G are perpendicular to the guide shaft 12C (see Figures 3 and 6). In other words, the orientation of the rotating members 12H is such that they can rotate freely in the direction of rolling along the axial direction of the guide shaft 12C. Viewed from the axial direction of the guide shaft 12C, the central axes of the pair of rotating members 12H in one through-hole 12G are inclined downward so as to be distributed toward one side and the other side (front and rear) in the circumferential direction, with the uppermost end of the guide shaft 12C in between. When the barrel tank 13 is not fixed to the case 12, each fixing member 12D contacts the guide shaft 12C only through the rotating members 12H (i.e., via the rotating members 12H). In other words, the parts of each fixed member 12D other than the rotating member 12H do not come into contact with the guide shaft 12C. As a result, the only resistance between the fixed member 12D and the guide shaft 12C is the rolling resistance caused by the rolling of the rotating member 12H. Therefore, each fixed member 12D can move smoothly along the guide shaft 12C.

[0021] As shown in Figures 3 and 4, each fixing member 12D has a set bolt 12J, a pressing plate 12K (see Figure 4), and a cover 12P. The set bolt 12J is screwed into the center of the fixing member 12D in the front-rear direction so as to penetrate vertically (see Figure 4). The set bolt 12J has the function of generating a pressing force for fixing the barrel tank 13 to the case 12. The pressing plate 12K has its thickness direction oriented vertically and is positioned below the set bolt 12J (see Figure 4). The pressing plate 12K is provided with a pair of columnar portions 12L protruding upward (see Figure 4). Each columnar portion 12L penetrates the fixing member 12D in the vertical direction and is positioned to sandwich the set bolt 12J from the front-rear direction (see Figure 4).

[0022] A compression coil spring 12M is inserted through each column section 12L (see Figure 4). The compression coil spring 12M is positioned in a compressed state between the head 12N at the upper end of each column section 12L and the fixing member 12D. The compression coil spring 12M acts to push up the head 12N, and has the function of pulling the pressure plate 12K into contact with the lower end of the set bolt 12J. When the set bolt 12J is tightened in this state to move downward, the pressure plate 12K is pressed downward by the set bolt 12J and moves downward.

[0023] The cover 12P is made of synthetic resin and is attached to the fixing member 12D so as to cover the top surface and the left and right sides of the fixing member 12D. The cover 12P has through holes formed vertically through which the set bolt 12J and a pair of columnar sections 12L can be inserted (see Figure 3).

[0024] Furthermore, each fixing member 12D is provided with a pair of abutment plates 12T (see Figure 3). These abutment plates 12T contact both left and right end faces of the abutment member 12Q. In one fixing member 12D, the pair of abutment plates 12T are inserted one by one onto the guide shaft 12C and attached one to each of the front and rear ends of the fixing member 12D. In the left fixing member 12D, the pair of abutment plates 12T are attached to the right side. In the right fixing member 12D, the pair of abutment plates 12T are attached to the left side. That is, in a pair of fixing members 12D, the abutment plates 12T are arranged to face each other.

[0025] [Barrel tank configuration] As shown in Figures 3 and 4, the barrel tank 13 comprises a tank body 13A and a lid 13B. The tank body 13A is a rectangular tube with a regular hexagonal axis oriented laterally, and an opening 13C is formed at one end in the axial direction. The barrel tank 13 is detachably fixed to the case 12. A mass (not shown) consisting of a workpiece and abrasive stones can be placed inside the tank body 13A through the opening 13C. The lid 13B is formed from a flat plate with a regular hexagonal shape. The tank body 13A is provided with a fixing part (not shown) for fixing the lid 13B when the opening 13C is closed. Thus, the barrel tank 13 is formed.

[0026] [An example of how to attach and detach the barrel tank from the case] Next, an example of how to attach the barrel tank 13 to the case 12 will be described. This explanation will mainly use a diagram of the left half of the case 12. First, as shown in Figure 6, the case 12 is positioned so that each fixing member 12D is located above the case 12. At this time, the distance between the pair of receiving plate portions 12B increases towards the upper end. The space between the pair of receiving plate portions 12B is the storage space S in which the barrel tank 13 is housed (see Figure 5). The distance between the upper edges of the pair of receiving plate portions 12B that form the storage space S is greater than the distance between the lower edges (see Figure 5). Then, each fixing member 12D is moved outward in the left-right direction along the guide shaft 12C (to the left in Figure 6) and abuts against the left-right inner surface (right side in Figure 6) of each side plate portion 12A. At this time, each fixing member 12D is magnetically attached to the magnet 12F attached to the side plate portion 12A, thereby holding each fixing member 12D in a state where it abuts against the horizontally inner surface of each side plate portion 12A.

[0027] At this time, the position of the fixing member 12D is a detachable position that allows the barrel tank 13 to be attached to and detached from the case 12. When the case 12 is viewed from above with the fixing member 12D positioned in the detachable position, the fixing member 12D is positioned to the left of the storage position of the barrel tank 13 in the case 12 (see the fixing member 12D indicated by the dashed line in Figure 3). Therefore, the fixing member 12D positioned in the detachable position does not interfere with the attachment and detachment of the barrel tank 13 to the case 12. The magnet 12F is magnetically attached to the fixing member 12D positioned in the detachable position to hold the fixing member 12D in that position. The set bolt 12J is then rotated in a direction that displaces it upward, causing it to protrude above each fixing member 12D. As a result, the pressing plate 12K is pulled upward by the compression coil spring 12M (see Figure 4).

[0028] Next, the barrel tank 13 is housed in the case 12. Specifically, the barrel tank 13 is housed in the case 12 by dropping it in from above. In this embodiment, two barrel tanks 13 can be housed in one case 12. The barrel tank 13 is kept in a state where the opening 13C is closed with the lid 13B and the lid 13B is fixed to the tank body 13A. Then, with the axis of the tank body 13A oriented in the left-right direction and the lid 13B facing the partition plate portion 12E, the barrel tank 13 is positioned and housed in a predetermined position inside the case 12. When the barrel tank 13 is housed in the case 12, contact members 13D provided on two of the sides of the tank body 13A come into contact with each receiving plate portion 12B (see Figure 5).

[0029] Next, as shown in Figure 8, each fixing member 12D is moved inward in the left-right direction (to the right in Figure 8). Each fixing member 12D is in contact with the guide shaft 12C only by the rotating member 12H (see Figure 5). Therefore, the only resistance between the fixing member 12D and the guide shaft 12C is the rolling resistance generated when the rotating member 12H rolls while supporting the weight of the fixing member 12D. If the fixing member 12D were to shift in the front-rear direction and the inner surface of the through hole 12G rubbed against the guide shaft 12C, the magnitude of the sliding resistance caused by this rubbing would be greater than the rolling resistance. Therefore, the fixing member 12D can move smoothly along the guide shaft 12C. In addition, although the fixing member 12D is heavy because it is made of metal such as iron, it does not need to be lifted against gravity when moving it, so the fixing member 12D can be easily moved without burdening the worker.

[0030] A pair of pins 12R are provided protruding from the inward-facing side surface of the abutment plate 12T of each fixing member 12D. Each pin 12R is positioned below the guide shaft 12C. The protruding end of each pin 12R is tapered. In addition, receiving holes 12S are formed indented inward in the left-right direction on both end faces of each abutment member 12Q. Each receiving hole 12S corresponds to each pin 12R. When viewed from the left-right direction, each receiving hole 12S is an elongated hole that is long in the vertical direction (see Figure 7). The vertical dimension of the receiving hole 12S is larger than the diameter of the pin 12R. The width dimension of the receiving hole 12S is slightly larger than the diameter of the pin 12R.

[0031] When each fixing member 12D is moved inward in the left-right direction and brought closer to the abutment member 12Q, each pin 12R is inserted into each receiving hole 12S. This determines the front-rear position of each fixing member 12D (the front and back directions in Figure 8). Then, the abutment plate 12T of each fixing member 12D is abutted against the abutment member 12Q. The position of the fixing member 12D when the abutment plate 12T of the fixing member 12D is a fixed position that allows the barrel tank 13, which is positioned in a predetermined position relative to the case 12, to be fixed to the case 12. When the case 12 is viewed from above with the fixing members 12D in the fixed position, the fixing members 12D are positioned overlapping with the barrel tank 13 (see Figure 3). For this reason, when the fixing members 12D are in the fixed position, the fixing members 12D get in the way and the barrel tank 13 cannot be attached to or detached from the case 12. The fixing member 12D is movable in the left-right direction (horizontally) between the fixed position and the detachable position.

[0032] Next, while maintaining the fixed position of the fixing member 12D, the set bolt 12J is tightened so as to displace it downwards. As a result, the pressing plate 12K is pushed downwards by the set bolt 12J and comes into surface contact with the receiving plate 13E provided on one of the sides of the tank body 13A.

[0033] When the set bolt 12J is further tightened, the fixing member 12D is pulled up. At this time, as the fixing member 12D is displaced upward, the guide shaft 12C is displaced downward relative to it within the through hole 12G. As a result, the rotating member 12H moves away from the guide shaft 12C (see Figure 9). Then, when the set bolt 12J is further tightened, the lowest end of the guide shaft 12C comes into contact with the lowest end of the inner surface of each through hole 12G (see Figure 9).

[0034] For example, the set bolt 12J is tightened so that the lowest end of the guide shaft 12C contacts the lowest end of the inner surface of each through hole 12G, and then displaces it further downward by a predetermined rotational angle. That is, the set bolt 12J is tightened by angle tightening. In this way, the fixing member 12D positioned in a fixed position fixes the barrel tank 13 to the case 12. The barrel tank 13, fixed to the case 12, is pressed toward the center of the barrel tank 13 from three different directions by the pressing plate 12K of the fixing member 12D and the pair of receiving plate portions 12B of the case 12 (see Figure 4).

[0035] With the barrel tank 13 fixed to the case 12, the case 12 is rotated planetarily around the rotation axis R. As a result, mass flows inside the tank body 13A, and the workpiece is polished by the abrasive stones.

[0036] To remove the barrel tank 13 from the case 12, the set bolt 12J is loosened to separate the pressure plate 12K from the tank body 13A, and then the fixing member 12D is moved from the fixed position to the detachable position. As long as the fixing member 12D does not shift in the front-rear direction, it is in contact with the guide shaft 12C only by the rotating member 12H, so only rolling resistance occurs between the fixing member 12D and the guide shaft 12C. For this reason, the fixing member 12D can move smoothly along the guide shaft 12C from the fixed position to the detachable position. When the fixing member 12D abuts against the side plate portion 12A, the fixing member 12D is magnetically attached to the magnet 12F and held in the detachable position. In this way, the barrel tank 13 can be removed from the case 12.

[0037] <Effects and Actions of Example 1> The centrifugal barrel polishing machine 100 comprises a rotationally driven turret 11, a case 12, a barrel tank 13 (to be fixed), and a fixing member 12D. The case 12 is mounted on the turret 11 and rotates planetarily, positioned eccentrically from the rotation axis R of the turret 11. The barrel tank 13 (to be fixed) is detachably fixed to the case 12. The fixing member 12D is mounted on the case 12 and is movable in the left-right direction (horizontally) between a fixed position that allows the barrel tank 13 (to be fixed), positioned at a predetermined position relative to the case 12, to be fixed to the case 12, and a detachable position that allows the barrel tank 13 (to be fixed) to be attached to and detached from the case 12. With this configuration, the operator can move the fixing member 12D in the left-right direction (horizontally) to move it between the fixed position and the detachable position without having to lift the fixing member 12D, thus reducing the burden on the operator even if the fixing member 12D is a heavy and robust object.

[0038] The object to be fixed is the barrel tank 13 into which workpieces can be loaded and which is housed in the case 12. The fixing member 12D positioned at the fixing location fixes the barrel tank 13 to the case 12. With this configuration, the barrel tank 13 can be attached to and detached from the case 12, making it easy to load and unload workpieces into and out of the barrel tank 13.

[0039] Case 12 has a guide shaft 12C that guides the fixed member 12D in the left-right direction (horizontal direction). The fixed member 12D has a rotating member 12H that contacts the guide shaft 12C from above and is rotatable in a direction that rolls in the axial direction of the guide shaft 12C. The fixed member 12D contacts the guide shaft 12C via the rotating member 12H. If the fixed member 12D were to contact the guide shaft 12C without the rotating member 12H, the resistance generated between the fixed member 12D and the guide shaft 12C would be sliding resistance. In contrast, in this embodiment, the fixed member 12D contacts the guide shaft 12C from above via the rotating member 12H, and the weight of the fixed member 12D is supported via the rotating member 12H. Therefore, the resistance generated between the fixed member 12D and the guide shaft 12C is rolling resistance, which is smaller than sliding resistance. As a result, the worker can smoothly move the heavy fixed member 12D with little force.

[0040] The rotating member 12H contacts one side and the other side of the uppermost end of the guide shaft 12C from above in the circumferential direction. The rotating member 12H contacts the upper half of the guide shaft 12C from above. With this configuration, when the fixed member 12D is moved along the guide shaft 12C, it is possible to suppress displacement of the fixed member 12D in the front-rear direction (horizontal direction) perpendicular to the axis of the guide shaft 12C.

[0041] The case 12 has a magnet 12F that magnetically attaches to a fixed member 12D positioned in a detachable position, thereby holding the fixed member 12D in that position. With this configuration, the fixed member 12D can be held in the detachable position by the magnet 12F, so that interference between the fixed member 12D and the barrel tank 13 can be reliably suppressed when attaching or detaching the barrel tank 13 to the case 12.

[0042] <Example 2> Next, Embodiment 2, which embodies the present invention, will be described with reference to Figures 10 and 11. The centrifugal barrel polishing machine 200 of Embodiment 2 differs from Embodiment 1 in that the tank body 113A is provided in the case 112, only the lid 113B is fixed, and the lid 113B is fixed to the tank body 113A with the opening 113C of the tank body 113A closed by a fixing member 112D. Components that are the same as those in Embodiment 1 are denoted by the same reference numerals, and the explanation of the structure, operation and effect is omitted.

[0043] As shown in Figure 10, the centrifugal barrel polishing machine 200 of Embodiment 2 comprises a pair of turrets 11, a plurality of cases 112, and a plurality of lids 113B to be fixed. Only one case 112 is shown in Figure 10. The case 112 has a pair of side plate sections 12A, a tank body 113A, a pair of planetary shafts P, a pair of guide shafts 12C (see Figure 11), and a fixing member 112D. The tank body 113A as a whole is a regular hexagonal rectangular tube with its axis oriented horizontally, and an opening 113C for loading a workpiece is formed on one of the faces of the regular hexagon. The tank body 113A is positioned between the pair of side plate sections 12A with the opening 113C facing upward and is fixed to each side plate section 12A.

[0044] One fixing member 112D is movable in the left-right direction between a pair of side plate portions 12A along a pair of guide shafts 12C. The fixing member 112D is not provided with the stopper plate 12T and pin 12R as in Embodiment 1. Multiple cases 112 thus formed are arranged between a pair of turrets 11 at positions eccentric to the rotation axis R.

[0045] The lid 113B is formed from a rectangular flat plate (see Figure 11). The lid 113B closes the opening 113C. The lid 113B and the tank body 113A are components that make up the barrel tank 113.

[0046] [An example of how to attach the barrel tank to the case] Next, an example of how to attach the lid 113B to the case 112 will be described. First, the case 112 is positioned so that the fixing member 112D is positioned above the case 112. At this time, the opening 113C is positioned facing upward. Then, the fixing member 112D is moved to the left along the guide shaft 12C and abuts against the left side plate portion 12A, causing the fixing member 112D to magnetically attach to the magnet 12F attached to the side plate portion 12A. At this time, the position of the fixing member 112D is the attachment / detachment allowable position (see the fixing member 112D shown by the dashed line in Figure 11). When viewing the case 112 with the fixing member 112D positioned in the attachment / detachment allowable position from above, the fixing member 112D is positioned to the left of the opening 113C (see Figure 11). Therefore, the fixing member 112D positioned in the attachment / detachment allowable position does not interfere with the attachment / detachment of the lid 113B to the case 112. Then, rotate the set bolt 12J in the loosening direction so that it protrudes above each fixing member 112D, and displace the pressing plate 12K upward.

[0047] Next, the lid 113B is placed on the tank body 113A so as to close the opening 113C. Then, the fixing member 112D is moved to the right. The fixing member 112D is in contact with the guide shaft 12C only by the rotating member 12H (see Figure 11). Therefore, rolling resistance is generated between the fixing member 112D and the guide shaft 12C as the rotating member 12H rolls while supporting the weight of the fixing member 112D. If the fixing member 112D were to shift in the front-to-back direction (up-down direction in Figure 11) and the inner surface of the through hole 12G rubbed against the guide shaft 12C, the magnitude of the sliding resistance caused by this rubbing would be greater than the rolling resistance. Therefore, the fixing member 112D can move smoothly along the guide shaft 12C. Then, the fixing member 112D is positioned in the left-right center of the lid 113B. At this point, the position of the fixing member 112D is the fixed position. When viewing the case 112 from above with the fixing member 112D positioned in its fixed location, the fixing member 112D overlaps with the lid 113B (see Figure 11). Therefore, when the fixing member 112D is in its fixed location, it obstructs the attachment and detachment of the lid 113B to the case 112.

[0048] Then, with the fixing member 112D in place, the set bolt 12J is tightened, displacing the pressing plate 12K downwards and bringing it into surface contact with the receiving plate 113E provided on the lid 113B from above (see Figure 10). The set bolt 12J is then tightened further, bringing the lowest end of the guide shaft 12C into contact with the lowest end of the inner surface of each through hole 12G (see Figure 9), and then the set bolt 12J is further tightened at an angle. The fixing member 112D, thus positioned in place, fixes the lid 113B, with the opening 113C closed, to the tank body 113A.

[0049] To remove the lid 113B from the case 112, the set bolt 12J is loosened to separate the pressure plate 12K from the lid 113B, and then the fixing member 112D is moved from the fixed position to the detachable position. As long as the fixing member 112D does not shift in the front-rear direction, it is in contact with the guide shaft 12C only by the rotating member 12H, so only rolling resistance occurs between the fixing member 112D and the guide shaft 12C. For this reason, the fixing member 112D can move smoothly along the guide shaft 12C from the fixed position to the detachable position. When the fixing member 112D abuts against the side plate portion 12A, the fixing member 112D is magnetically attached to the magnet 12F and held in the detachable position. This allows the lid 113B to be removed from the case 112.

[0050] <Effects and Actions of Example 2> The centrifugal barrel polishing machine 200 comprises a rotationally driven turret 11, a case 112, a lid 113B (to be fixed), and a fixing member 112D. The case 112 is mounted on the turret 11 and rotates planetarily, positioned eccentrically from the rotation axis R of the turret 11. The lid 113B (to be fixed) is detachably fixed to the case 112. The fixing member 112D is mounted on the case 112 and is movable in the left-right direction (horizontally) between a fixed position that allows the lid 113B (to be fixed), positioned at a predetermined position relative to the case 112, to be fixed to the case 112, and a detachable position that allows the lid 113B (to be fixed) to be attached to and detached from the case 112. With this configuration, the worker can move the fixing member 112D in the left-right direction (horizontal direction) without lifting the fixing member 112D, thereby displacing it between the fixed position and the detachable position. This reduces the burden on the worker even if the fixing member 112D is a heavy and robust object.

[0051] Case 112 has a tank body 113A with an opening 113C for loading workpieces. The object to be fixed is a lid 113B that closes the opening 113C. The lid 113B and the tank body 113A constitute a barrel tank 113. A fixing member 112D positioned at the fixing location fixes the lid 113B, with the opening 113C closed, to the tank body 113A. With this configuration, the tank body 113A is provided in case 112, and only the lid 113B is attached to and detached from case 112, so there is no need to carry the tank body 113A around.

[0052] <Other examples> The present invention is not limited to the embodiments described above and in the drawings, and the following embodiments, for example, are also included in the technical scope of the present invention. (1) Unlike in Example 1, the cross-sectional shape perpendicular to the axial direction of the guide shaft may be a polygon. In this case, it is preferable to place one edge at the uppermost end. (2) Unlike in Example 1, the rotation axis of the turret may be set in the vertical direction, and planetary axes extending in the horizontal direction may be arranged around the rotation axis. (3) Unlike in Example 1, the rotating member may be shaped like a drum with a recess in the center in the axial direction, and the rotating member may be positioned so that the uppermost end of the guide shaft fits into the recess in the center. Alternatively, a cylindrical rotating member with a horizontal axis may be positioned so as to contact the uppermost end of the guide shaft. In this case, there is a concern that the fixed member may shift in the front-rear direction, causing friction between the inner surface of the through hole and the guide shaft. However, compared to the case without a rotating member, it is easier to move the fixed member in the direction along the guide shaft. (4) Unlike in Example 1, a magnet may be provided on the fixing member. (5) Unlike in Example 1, the number of barrel tanks that can be housed in the case may be 1 or 3 or more. (6) Multiple cases connected to the turret may be two in symmetrical positions in the circumferential direction, or three or more at equal intervals in the circumferential direction. (7) Unlike Examples 1 and 2, instead of set bolts, an eccentric cam may be provided on the fixing member, and the object to be fixed may be pressed downward by rotating the eccentric cam. [Explanation of Symbols]

[0053] 11: Turret 12,112: Case 12C: Guide axis 12D, 112D: Fixing member 12F: Magnet 12H: Rotating member 13: Barrel tank (for fixed storage) 13A: Tank body 13B: Lid 13C: Opening 100,200: Centrifugal barrel polishing machine 113: Barrel tank 113A: Tank body 113B: Lid (to be fixed) 113C: Opening R: Rotation axis

Claims

1. A rotating turret, A case provided on the turret, positioned eccentrically from the rotation axis of the turret and rotating in a planetary pattern, A fixed object that is detachably fixed to the aforementioned case, A fixing member provided in the case, which is movable horizontally between a fixing position that allows the object to be fixed to the case, which is positioned at a predetermined position relative to the case, and a detachable position that allows the object to be attached to and detached from the case, Equipped with, The case has a guide shaft that guides the fixing member in the horizontal direction, The fixing member has a rotating member that is rotatable in a direction that contacts the guide shaft and rolls in the axial direction of the guide shaft. The aforementioned fixing member contacts the guide shaft via the rotating member in a centrifugal barrel polishing machine.

2. The aforementioned fixed object is, A barrel tank into which a workpiece can be loaded and which is housed in the case, The fixing member positioned at the aforementioned fixed position fixes the barrel tank to the case, as described in claim 1.

3. The aforementioned case has a tank body in which an opening for loading a workpiece is formed, The object to be fixed is a lid that closes the opening, The lid and the tank body constitute a barrel tank. The centrifugal barrel polishing machine according to claim 1, wherein the fixing member positioned at the fixed position fixes the lid to the tank body in a closed state.

4. The centrifugal barrel polishing machine according to any one of claims 1 to 3, wherein the rotating member contacts one side and the other side in the circumferential direction, with the uppermost end of the guide shaft in between.

5. The centrifugal barrel polishing machine according to any one of claims 1 to 3, wherein the case has a magnet that magnetically attaches to the fixing member positioned at the detachable position to hold the fixing member in the detachable position.

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