Centrifugal barrel polishing machine

Abstract

To reliably fix a barrel tank irrespective of material used for a barrel body.SOLUTION: A centrifugal barrel polishing machine A comprises: a plurality of barrel cases 50; a barrel tank 20 having a barrel main body 30 which is housed in the barrel case 50 and has an opening 34 in a top face, and a lid 40 which blocks the opening 34; a held portion 31 which is integrally provided on the barrel main body 30, and projects from an outer peripheral surface of the barrel main body 30; and a fixation member 70 which is attached to the barrel case 50, and pinches and fixes the held portion 31 between the fixation member 70 and the barrel case 50.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a centrifugal barrel polishing machine in which a barrel tank having a form in which an opening on the upper surface of a bottomed cylindrical barrel body is closed with a lid is housed in a bottomed cylindrical barrel case, and polishing is performed in the barrel tank by causing the barrel tank and the barrel case to rotate planetarily. In this centrifugal barrel polishing machine, the barrel tank is fixed to the barrel case by applying a downward pressing force to the lid. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent No. 7026381 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] In recent years, there has been a demand for reducing heavy muscular work of workers, and demand for weight reduction of barrel tanks is increasing. In addition, space saving of barrel polishing apparatuses is also demanded, and weight reduction of barrel tanks is also effective for downsizing a drive mechanism for planetarily rotating the barrel tank (barrel case). Some barrel tanks designed for weight reduction are made of urethane resin. However, when a urethane resin barrel tank is used in a barrel polishing machine like that of Patent Document 1, the urethane resin, which is an elastic body, cannot withstand the pressing force from the pressing member, and there is a concern that this may cause poor fixation or deformation of the barrel tank, leakage of contents due to reduced sealing performance between the lid and the barrel body, and the like.

[0005] The present invention has been completed based on the above circumstances, and an object of the present invention is to reliably fix a barrel tank regardless of the material used for the barrel body. [Means for Solving the Problem]

[0006] The centrifugal barrel polishing machine according to the present invention is One or more barrel cases, A barrel tank having a barrel body housed in the barrel case and having an opening on its upper surface, and a lid that closes the opening, A portion to be held is integrally provided with the barrel body and protrudes from the outer circumferential surface of the barrel body, A fixing member is attached to the barrel case and secures the portion to be held by sandwiching it between the barrel case and the fixing member, It is equipped with. [Effects of the Invention]

[0007] According to the present invention, since the part to be held is sandwiched between the barrel case and the fixing member, the range of materials that can be used for the barrel body is expanded. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a side view of the centrifugal barrel polishing machine of Example 1. [Figure 2] Figure 2 is a side view showing the barrel case. [Figure 3] Figure 3 is a side view showing the barrel tank. [Figure 4] Figure 4 is a plan view showing the barrel body. [Figure 5] Figure 5 is a plan view showing the lid. [Figure 6] Figure 6 is a plan view showing the barrel body with the lid placed on top. [Figure 7] Figure 7 is a side view showing the barrel body with the lid placed on top and the clamp handle in the restricted position. [Figure 8] Figure 8 is a side view showing the fixing member. [Figure 9] Figure 9 is a side view showing the barrel tank placed on the barrel case. [Figure 10] Figure 10 is a side view showing the barrel case with the fixing member attached. [Figure 11]Fig. 11 is an enlarged side view of essential parts showing a state where a clamped portion is sandwiched from above and below by a support portion and a pressing portion of a fixing member. [Figure 12] Fig. 12 is a side view showing a state where both horizontal end portions of an upper bar are fitted into downward recesses of pressure receiving portions. [Figure 13] Fig. 13 is a side view showing a state where a knob is tightened. MODE FOR CARRYING OUT THE INVENTION

[0009] <Example 1> Hereinafter, Example 1 embodying the present invention will be described with reference to Figs. 1 to 13. In the following description, regarding the vertical direction, the directions shown in Figs. 1 to 3 and Figs. 7 to 13 are directly defined as upper and lower. Also, the left-right direction in Figs. 1 to 3 and Figs. 7 to 13 is defined as the horizontal direction.

[0010] [Overall Configuration of Centrifugal Barrel Polishing Machine]

[0011] As shown in Fig. 1, the centrifugal barrel polishing machine A according to the present Example 1 includes: a turret 12 formed in a disk shape with a plate surface oriented in the vertical direction; four (a plurality of) barrel cases 50 attached to the turret 12; a barrel tank 20 accommodated in the barrel case 50; and a fixing member 70 mounted on the barrel case 50. Note that Fig. 1 shows two of the four barrel cases 50.

[0012] [Configuration of Turret] The turret 12 has four eccentric positions set at an equal angular pitch of 90 degrees on the same circumference that is eccentric in the radial direction from the center axis Ca of the turret itself. At each eccentric position, a rotation shaft 55 of the barrel case 50 is rotatably attached to the turret 12.

[0013] [Configuration of Barrel Case] As shown in Fig. 2, each barrel case 50 includes a case main body 54, a rotation shaft 55, and a pair of pillar portions 51. The case main body 54 has a bottomed cylindrical shape with its axis oriented in the vertical direction and an open upper surface. The rotation shaft 55 is provided to extend downward coaxially with the axis of the case main body 54 from the bottom wall of the case main body 54. Each barrel case 50 rotates about the axis of the case main body 54 as the turret 12 rotates about the central axis Ca. That is, each barrel case 50 is capable of planetary rotation relative to the turret 12.

[0014] The pair of pillar portions 51 are provided in a pair on each case main body 54. Each pillar portion 51 has a flat plate shape and extends long in the vertical direction. Each pillar portion 51 is attached to the case main body 54 in a state where the plate surface is aligned along the outer peripheral surface of the case main body 54. Specifically, each pillar portion 51 is fixed to the outer peripheral surface of the case main body 54 with the axis of the case main body 54 interposed therebetween. The pillar portion 51 protrudes upward beyond the upper end of the case main body 54.

[0015] Each pillar portion 51 is provided with a pressure receiving portion 52 and a support portion 53. The pressure receiving portion 52 and the support portion 53 each have a block shape. A downward recess 52A is formed on the lower surface of the pressure receiving portion 52, the downward recess 52A being recessed upward in a rectangular parallelepiped shape and facing downward. An upward recess 53A is formed on the upper surface of the support portion 53, the upward recess 53A being recessed downward in a rectangular parallelepiped shape and facing upward. The pressure receiving portion 52 is attached to the upper end portion of the pillar portions 51 on the opposing plate surfaces of the pair of pillar portions 51. The support portion 53 is attached to a position at the vertical center portion of the pillar portion 51 along the upper edge of the case main body 54 among the opposing plate surfaces of the pair of pillar portions 51. Each pressure receiving portion 52 is disposed directly above each corresponding support portion 53. The downward recess 52A and the upward recess 53A are open toward (inwardly toward) the axis of the case main body 54.

[0016] Configuration of Barrel Tank As shown in Figure 3, the barrel tank 20 comprises a bottomed cylindrical barrel body 30 formed as an opening 34 with its upper surface open and its axis oriented vertically, and a lid 40 that closes the opening 34. The entire barrel body 30 is made of, for example, a urethane resin with a Shore A hardness of about 95 degrees. The inner wall surface of the barrel body 30 is formed in a polygonal shape (octagonal in this embodiment) in a plan view (see Figure 4). The outer diameter of the upper end 30A of the barrel body 30 is smaller than the outer diameter of the portion below the upper end 30A. The upper end 30A of the barrel body 30 is formed in a stepped shape that is inwardly facing the portion below the upper end 30A.

[0017] An annular retaining portion 31, which is a separate component from the barrel body 30, is attached to the upper end of the outer circumferential surface of the barrel body 30. The retaining portion 31 protrudes slightly outward from the outer circumferential surface of the barrel body 30. For example, carbon steel is used for the retaining portion 31. In other words, the retaining portion 31 is harder than the barrel body 30, which is made of urethane resin. The retaining portion 31 is provided continuously around the entire circumference of the outer circumferential surface of the barrel body 30, surrounding the opening 34 so as to follow the opening 34 (see Figure 4). The retaining portion 31 is integrally provided with the barrel body 30 by insert molding.

[0018] The retained portion 31 is provided with a pair of clamped portions 32 (see Figure 4). Each clamped portion 32 is block-shaped. For example, stainless steel alloy is used for the clamped portions 32. Each clamped portion 32 protrudes outward from the outer circumferential surface of the retained portion 31 (see Figure 4). In other words, each clamped portion 32 protrudes outward from the outer circumferential surface of the barrel body 30. Each clamped portion 32 is fixed to the retained portion 31 by bolts and is constructed separately from the retained portion 31. The pair of clamped portions 32 are positioned opposite each other across the axis of the barrel body 30 (see Figure 4). A guide recess 33 is formed at the upper end of each clamped portion 32. Each guide recess 33 is formed in a V-shape in each clamped portion 32 by two inclined surfaces that slope downward toward the center in the circumferential direction of the barrel body 30 (see Figure 11). The angle formed by these two inclined surfaces is an obtuse angle greater than 90 degrees and less than 180 degrees. A downward-facing recessed recess 33A is formed at the lower end of the guide recess 33 (see Figure 11).

[0019] A clamp handle 35 is provided on the part to be held 31. The clamp handle 35 is made of metal. The clamp handle 35 is formed from a strip of metal in an arc shape, and both ends are connected to the outer surface of the part to be held 31 via support columns 36. The support columns 36 are fixed to the part to be held 31 by bolts. The clamp handle 35 is rotatably connected to the support columns 36. One eccentric cam 37 is provided at each end of the clamp handle 35 (see Figure 4). These eccentric cams 37 are cylindrical in shape. These eccentric cams 37 have their own axes E parallel to the axis of rotation Ra on which the clamp handle 35 rotates, and are positioned at a predetermined distance apart. These eccentric cams 37 are integrated with the clamp handle 35 (relative displacement is not possible) and rotate together with the clamp handle 35 around the axis of rotation Ra on which the clamp handle 35 rotates.

[0020] As shown in Figure 4, the clamp handle 35 is provided with a pair of restricting parts 38. These restricting parts 38 are integrated with the clamp handle 35. These restricting parts 38 are provided projecting inward from the inner circumference of the arc-shaped clamp handle 35. More specifically, these restricting parts 38 are arranged in the direction in which the rotation axis Ra extends, flanking the center of the clamp handle 35, and are spaced apart from each other by a predetermined distance.

[0021] As shown in Figures 3 and 5, the lid 40 is composed of a lid body 41 which is as a whole disc-shaped, a handle 47 formed on the upper surface of the lid body 41, and a pair of pressing members 46. As shown in Figure 3, the lid body 41 has a disc-shaped plate portion 44 and a closing plate portion 45. An annular portion 44A is provided on the outer peripheral edge of the plate portion 44, hanging down in an annular shape. The closing plate portion 45 is disc-shaped and is positioned inside the annular portion 44A and fixed to the lower surface of the plate portion 44.

[0022] The plate portion 44 is made of, for example, an aluminum alloy. The closing plate portion 45 is made of, for example, a urethane resin. The outer diameter of the plate portion 44 is approximately the same as the outer diameter of the barrel body 30. The outer diameter of the closing plate portion 45 is slightly smaller than the outer diameter of the plate portion 44. The handle 47 is made of, for example, a synthetic resin. The handle 47 has a handle body 48 that extends horizontally and legs 49 that hang down from both ends of the handle body 48. The handle 47 is positioned so that the lower ends of the legs 49 are in contact with the upper surface of the plate portion 44 and is fixed to the upper surface of the plate portion 44 by bolts.

[0023] The pair of pressed members 46 are rectangular in shape and made of metal. For example, stainless steel alloy is used for the pressed members 46. The pressed members 46 are harder than the plate portion 44 and the closing plate portion 45. These pressed members 46 are arranged symmetrically with respect to the outer peripheral edge of the upper surface of the plate portion 44, with the handle body 48 extending horizontally in between, and are fixed by bolts (see Figure 5). These pressed members 46 are arranged so that their longitudinal direction is along the outer circumference of the plate portion 44.

[0024] [An example of attaching the cover to the barrel body] When attaching the lid 40 to the barrel body 30, first, position the clamp handle 35 of the barrel body 30 along the opening 34 of the barrel body 30 (see Figure 3). At this time, the pair of eccentric cams 37 are positioned eccentrically upward with respect to the rotation axis Ra (see Figure 3). At this time, the axis E of the pair of eccentric cams 37 is positioned above the rotation axis Ra (see Figure 3). This causes the eccentric cams 37 to move upward away from the opening 34 of the barrel body 30, making it possible to attach the lid 40 to the barrel body 30. The position of the clamp handle 35 at this time is in a permissible state that allows for the attachment and detachment of the lid 40 to the barrel body 30. At this time, the pair of restricting parts 38 of the clamp handle 35 are positioned along the inner peripheral edge of the opening 34 in a plan view (see Figure 4).

[0025] Next, the workpiece, abrasive stones, and, if necessary, water and compound are placed inside the barrel body 30. Then, the lid 40 is placed on the upper edge of the barrel body 30, and the closing plate portion 45 closes the opening 34. At this time, the upper end portion 30A of the barrel body 30 enters the inside of the annular portion 44A from below and contacts the lower surface of the closing plate portion 45 (see Figure 7). Also, one end of the handle body 48 of the handle 47 is fitted between the pair of restricting portions 38 (see Figure 6). This determines the orientation of the barrel body 30 relative to the opening 34 on the lid 40.

[0026] Next, the clamp handle 35, which is in the allowable state, is rotated around the rotation axis Ra, moving the pair of eccentric cams 37 downwards. At this time, the pair of eccentric cams 37 rotate together with the clamp handle 35 around the rotation axis Ra. As shown in Figure 7, the eccentric cams 37 approach the opening 34 of the barrel body 30 from above and make contact with the pressed member 46 of the lid 40. When the clamp handle 35 is further rotated around the rotation axis Ra and positioned so that it is aligned with the opening 34 of the barrel body 30, the pressed member 46 is pressed by the eccentric cams 37. At this time, the axis E of the eccentric cam 37 is positioned below the rotation axis Ra. In this way, the lid 40 is pressed down on the opening 34 of the barrel body 30 from above, and the opening 34 is closed by the lid 40. At this time, the clamp handle 35 is in a restrictive state that restricts the attachment and detachment of the lid 40 to the barrel body 30, pressing the lid 40 against the barrel body 30.

[0027] [Configuration of fixing members] As shown in Figure 8, the fixing member 70 has an upper bar 71 extending horizontally, a lower bar 72 positioned below the upper bar 71 and extending parallel to the upper bar 71, and a pair of pressing parts 73 hanging down from both horizontal ends of the lower bar 72. For example, aluminum alloy or stainless steel alloy can be used for the upper bar 71, the lower bar 72, and the pair of pressing parts 73. Through holes H are formed at both horizontal ends of the upper bar 71, penetrating in the vertical direction.

[0028] A screw hole S is formed in the horizontal center of the upper bar 71, extending vertically through it. A bolt 74 with a knob 74A at its upper end is screwed into the screw hole S from above. Guide posts 75, which are cylindrical in shape and protrude upward, are provided at both horizontal ends of the lower bar 72. The guide posts 75 are inserted from below into the through hole H of the upper bar 71. A compressed compression coil spring 76 is inserted between the upper bar 71 and the lower bar 72 in the guide post 75. A block-shaped abutment 72A is provided in the horizontal center of the lower bar 72, protruding upward. Each of the lower ends of the pair of pressing parts 73 is covered by a contact member 77 made of synthetic resin. When viewed from the longitudinal direction of the lower bar 72, the lower end of the contact member 77 has two inclined surfaces that slope downward toward the horizontal center (see Figure 11). In other words, the lower end of the contact member 77 is formed in a V-shape corresponding to the guide recess 33.

[0029] [An example of attaching the barrel chamber to the barrel case] The barrel tank 20 is housed in the barrel case 50 by being dropped in from above. Specifically, as shown in Figure 9, the barrel body 30 is positioned below the lid 40, and the clamped portion 32 of the barrel body 30 is fitted into the upward recess 53A of the support portion 53 of the barrel case 50.

[0030] Next, the fixing member 70 is attached to the barrel case 50. Specifically, as shown in Figure 10, the knob 74A is rotated counterclockwise to move the bolt 74 upward relative to the screw hole S, so that the lower end of the bolt 74 is almost flush with the lower surface of the upper bar 71. Then, the contact members 77 of each pressing part 73 are positioned in the guide recess 33 of each clamped part 32 (see Figure 11). At this time, the lower end of the pressing part 73 is guided to the correct pressing position by the two obtuse-angled V-shaped inclined surfaces formed in the guide recess 33 (see Figure 11). Here, the correct pressing position is the state in which the lower end of the pressing part 73 is positioned directly above the clamped part 32.

[0031] Next, both ends of the upper bar 71 are fitted into the downward recesses 52A of each pressure receiving section 52. Specifically, the upper bar 71 is pressed in a direction that brings it closer to the lower bar 72, slightly compressing the compression coil spring 76, and both ends of the upper bar 71 are positioned below each pressure receiving section 52. Then, the pressure applied to the upper bar 71 in the direction that brings it closer to the lower bar 72 is stopped. As a result, as shown in Figure 12, the upper bar 71 is pushed up by the elastic force of the compression coil spring 76 and fitted into the downward recesses 52A of the pressure receiving section 52 from below.

[0032] Next, the knob 74A is rotated clockwise. As a result, as shown in Figure 13, the bolt 74 moves downward. The lower end of the bolt 74 then contacts the upper end of the abutment portion 72A of the lower bar 72, thereby restricting the upper bar 71 from approaching the lower bar 72. Simultaneously, the clamped portion 32 is pressed and clamped from above and below by the contact member 77 of the pressing portion 73 of the fixing member 70 and the support portion 53 of the barrel case 50. In this way, the barrel tank 20 is fixed to the barrel case 50. In the barrel tank 20 mounted on the barrel case 50, the barrel body 30 and the lid 40 are not in contact with the fixing member 70 and the barrel case 50. The barrel tank 20 mounted on the barrel case 50 is held by the barrel case 50 via the clamped portion 32.

[0033] <Effects and Effects of the Examples> The centrifugal barrel polishing machine A of this embodiment 1 comprises a barrel tank 20 having a plurality of barrel cases 50, a barrel body 30 housed in the barrel cases 50 and having an opening 34 on its upper surface, and a lid 40 that closes the opening 34, a holding portion 31 integrally provided on the barrel body 30 and protruding from the outer peripheral surface of the barrel body 30, and a fixing member 70 attached to the barrel case 50 that clamps and fixes the holding portion 31 between itself and the barrel case 50. With this configuration, since the holding portion 31 is clamped between the barrel case 50 and the fixing member 70, the range of materials that can be used for the barrel body 30 is expanded.

[0034] The part to be held 31 is made of metal. With this configuration, the part to be held 31 is less likely to bend, making it easier for the fixing member 70 and the barrel case 50 to firmly grip the part to be held 31.

[0035] The retained portion 31 forms a continuous annular shape around the entire circumference of the barrel body 30. This configuration makes it difficult to deform the barrel body 30.

[0036] The retained portion 31 is positioned along the opening 34. This configuration makes it easier to make the opening 34 less prone to deformation, thus making it easier to make the lid 40 fit snugly against the opening 34.

[0037] In the barrel chamber 20, when mounted in the barrel case 50, the barrel body 30 and the lid 40 are in a non-contact state with respect to the fixing member 70 and the barrel case 50. This configuration eliminates the constraint on the size of the barrel body 30, making it possible to accommodate barrel bodies 30 of different heights in the barrel case 50.

[0038] The clamped portion 32 of the held portion 31 has a guide recess 33 that guides the fixing member 70 to the correct pressing position. This configuration prevents the fixing member 70 from being positioned incorrectly relative to the clamped portion 32 of the held portion 31.

[0039] The barrel body 30 is made of urethane resin. This configuration makes it easier to reduce weight compared to using metal for the barrel body 30.

[0040] The retained portion 31 has a clamped portion 32 that is sandwiched between the fixing member 70 and the barrel case 50, and the clamped portion 32 is constructed separately from the retained portion 31. With this configuration, by constructing the clamped portion 32 separately from the retained portion 31, it is easy to replace the clamped portion 32 even if it becomes worn.

[0041] The lid 40 has a handle 47, and the barrel body 30 has a restricting portion 38 that restricts the orientation of the lid 40 relative to the opening 34 when the handle 47 is fitted into it. With this configuration, the restricting portion 38 can use the handle 47 of the lid 40 to restrict the orientation of the lid 40 relative to the opening 34, thereby suppressing variations in contact between the lid 40 and the opening 34.

[0042] <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 Example 1, this can also be applied to centrifugal barrel polishing machines in which the number of barrel cases installed in one turret is three or less, or five or more. (2) Unlike in Example 1, the present invention may be applied to a centrifugal barrel polishing machine that rotates around a horizontal axis of rotation. (3) Unlike in Example 1, the part to be held and the part to be clamped may be formed integrally. (4) Unlike in Example 1, the retained portion may be provided at the upper end, the upper and lower center, and the lower end of the barrel body. (5) Unlike in Example 1, the barrel body may be made of a synthetic resin other than urethane resin. (6) Unlike in Example 1, the retained portion may be in an arc shape, and multiple retained portions may be provided along the outer circumference of the barrel body. (7) Unlike in Example 1, a hard engineering plastic may be used for the part to be held. [Explanation of Symbols]

[0043] 20… Barrel tank 30… Barrel body 31...Holded part 32...Pinched part 33… Guide recess 34…Opening 38…Regulatory Department 40…Lid 47…Toride 50… Barrel case 70… Fixing member A... Centrifugal barrel polishing machine

Claims

1. One or more barrel cases, A barrel tank having a barrel body housed in the barrel case and having an opening on its upper surface, and a lid that closes the opening, A portion is integrally provided with the barrel body, forming a continuous annular shape around the entire circumference of the barrel body, and positioned along the opening, with a holding portion protruding from the outer circumferential surface of the barrel body, A fixing member is attached to the barrel case and secures the portion to be held by sandwiching it between the barrel case and the fixing member, A centrifugal barrel polishing machine characterized by being equipped with the following features.

2. The centrifugal barrel polishing machine according to claim 1, characterized in that the held portion is made of metal.

3. The centrifugal barrel polishing machine according to claim 1 or 2, characterized in that, in the barrel tank mounted in the barrel case, the barrel body and the lid are in a non-contact state with respect to the fixing member and the barrel case.

4. The centrifugal barrel polishing machine according to claim 1 or 2, characterized in that the holding portion has a guide recess formed therein for guiding the fixing member to the correct pressing position.

5. The centrifugal barrel polishing machine according to claim 1 or 2, characterized in that the barrel body is made of urethane resin.

6. The centrifugal barrel polishing machine according to claim 1 or 2, characterized in that the holding portion is provided with a clamping portion, and the clamping portion is sandwiched between the fixing member and the barrel case.

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