Magnetic Separator

Abstract

To provide a magnet separator which indicates an amount of a magnetic metal powder magnetically attached to surfaces of a magnet and a magnet case without taking out the magnet and the magnet case.SOLUTION: A magnet separator 1 includes: a magnet 10 which is inserted into an opening 200a provided on an upper surface of a coolant tank 200 and to which a magnetic metal powder contained in a coolant in the coolant tank 200 is magnetically adhered; a magnet case 22 which protects the magnet 10; a support member 130 which is disposed on the upper surface of the coolant tank 200 and has an elastic body 131; a float member which supports the magnet 10 and the magnet case 22, is supported at a lower surface by the elastic body 131, and is lowered with the magnet 10 and the magnet case 22 by a weight of the magnetic metal powder magnetically adhered to the magnet 10 and the magnet case 22; and an index part 133a which indicates a distance that the float member is lowered.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a magnetic separator. [Background technology]

[0002] Patent Document 1 discloses a magnetic powder separation device in which magnetic metal powder contained in the liquid inside the liquid tank is magnetically attracted to a magnet inserted into the liquid tank, and an operator periodically removes the magnet with the magnetic metal powder magnetically attracted thereto from the liquid tank and scrapes off the magnetic metal powder before reusing it. The magnetic powder separation device disclosed in Patent Document 1 can prevent a decrease in the magnetic attraction force of the magnet due to magnetic metal powder magnetically attracted to the surface of the magnet.

[0003] Patent Document 2 discloses a magnetic powder separation device in which a magnet case with a movably mounted permanent magnet inside is inserted into a tank and magnetic metal powder contained in the liquid inside the tank is magnetically attracted to the magnet case. In the magnetic powder separation device disclosed in Patent Document 2, the magnet case to which the magnetic metal powder is magnetically attracted is removed and the permanent magnet is moved to the upper end of the magnet case, thereby losing the magnetic force that had been magnetically attracting the magnetic metal powder to the magnet case, and the magnetic metal powder that had been magnetically attracted to the magnet case falls due to gravity, and the magnetic metal powder is removed from the magnet case. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5454825 [Patent Document 2] Patent No. 4463654 Summary of the Invention [Problem to be solved by the invention]

[0005] In the magnetic powder separation device disclosed in Patent Document 1, the operator cannot see the state of the magnet until he or she removes it from the liquid tank, and therefore cannot recognize the amount of magnetic metal powder magnetically attached to the surface of the magnet until he or she removes the magnet.

[0006] In the magnetic powder separation device disclosed in Patent Document 2, the worker cannot see the state of the magnet case stones until he removes the magnet case from the tank. Therefore, the worker cannot recognize the amount of magnetic metal powder magnetically attached to the surface of the magnet case until he removes the magnet case.

[0007] The present invention has been made to solve the above-mentioned problems, and aims to provide a magnetic separator that indicates the amount of magnetic metal powder magnetically attached to the surface of a magnet and a magnet case without removing the magnet and the magnet case. [Means for solving the problem]

[0008] In order to achieve the above object, the magnetic separator according to the present invention comprises: a magnet that is inserted into an opening provided on the top surface of the coolant tank and that magnetically attracts magnetic metal powder contained in the coolant liquid inside the coolant tank; a magnet case for protecting the magnet; a support member having an elastic body and disposed on an upper surface of the coolant tank; a float member that supports the magnet and the magnet case, has its lower surface supported by the elastic body, and descends together with the magnet and the magnet case due to the weight of the magnetic metal powder magnetically attracted to the magnet and the magnet case; an indicator portion that indicates the amount of descent of the float member; Equipped with.

[0009] the magnet is a bar magnet, The magnet case may be formed in a cylindrical shape that covers the surface of the bar magnet, and at least one end may be immersed in the coolant liquid.

[0010] the float member is an annular member having a first insertion hole formed in the center thereof through which the magnet and the magnet case are inserted, the magnet case has a flange portion, The flange may be placed on an upper surface of the float member.

[0011] A plurality of the support members may be provided at positions surrounding the first insertion hole.

[0012] a ring-shaped non-magnetic case disposed on an upper surface of the coolant tank, having an opening that opens upward and a second insertion hole formed in the center, through which the magnet and the magnet case are inserted; an end stopper that defines the maximum amount of descent of the float member; Further provided with the support member and the end stopper are provided inside the non-magnetic case, The float member may close the opening, thereby covering the support member and the end stopper together with the non-magnetic case.

[0013] The elastic body may be a compression spring.

[0014] the support member has a guide pin whose upper end protrudes from the upper surface of the float member, and a marker pin provided at the upper end of the guide pin, The indicator portion may be provided on a side surface of the marker pin.

[0015] The float member may further include a washer that covers the indicator portion.

[0016] The float member may be made of a non-magnetic material. [Effects of the Invention]

[0017] In the magnetic separator according to the present invention, the float member supporting the magnet and magnet case descends together with the magnet and magnet case due to the weight of the magnetic metal powder magnetically attached to the surfaces of the magnet and magnet case. As the float member descends, the indicator becomes exposed and shows the amount of descent of the float member and the amount of magnetic metal powder magnetically attached to the surfaces of the magnet and magnet case. As a result, the present invention can provide a magnetic separator that shows the amount of magnetic metal powder magnetically attached to the surfaces of the magnet and magnet case without removing the magnet and magnet case. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing the appearance of a coolant tank using a magnetic separator according to an embodiment of the present invention; [Figure 2] 1 is a plan view showing the appearance of a coolant tank using a magnetic separator according to an embodiment of the present invention; [Figure 3] FIG. 2 is a cross-sectional view taken along line II' in FIG. [Figure 4] FIG. 2 is a perspective view showing the appearance of the magnetic separator according to the embodiment. [Figure 5] FIG. 2 is a perspective view showing a holder portion and a floating portion according to the embodiment. [Figure 6] 1A is a plan view of a holder unit according to an embodiment, and FIG. 1B is a bottom view of the holder unit according to an embodiment. [Figure 7] FIG. 2 is a perspective view showing a magnet alone according to the embodiment. [Figure 8] 10 is an enlarged view showing a usage state of the holder part according to the embodiment. FIG. [Figure 9] FIG. 4 is an enlarged view of the magnetic separator in FIG. 3. [Figure 10] FIG. 2 is a plan view showing the appearance of the magnetic separator according to the embodiment. [Figure 11] 10 is a cross-sectional view showing the appearance of the support member and the end stopper in a state where the holder portion according to the embodiment has been removed. FIG. [Figure 12]FIG. 2 is a perspective view showing the bottom surface of a floating portion according to the embodiment. [Figure 13] FIG. 4 is an enlarged view showing an indicator portion according to the embodiment. [Figure 14] FIG. 10 is a perspective view showing another mode of use of the magnetic separator according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] Embodiment A magnetic separator 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0020] The magnetic separator 1 is a device for removing magnetic metal powder contained in the coolant liquid inside the coolant tank 200. As shown in FIGS. 1 to 3, the magnetic separator 1 includes a holder portion 2 and a floating portion 100.

[0021] The holder part 2 is a member that is inserted into an opening 200a formed in the top surface of the coolant tank 200 and magnetically attracts magnetic metal powder contained in the coolant liquid inside the coolant tank 200. As shown in Figures 5 to 7, the holder part 2 has a magnet 10 and a holding member 20.

[0022] The magnet 10 is a bar magnet as shown in Fig. 7. As shown in Fig. 3, when the holder part 2 is inserted into the opening 200a of the coolant tank 200, the lower end of one end of the magnet 10 is positioned below the liquid surface S of the coolant liquid inside the coolant tank 200. A handle 11 is provided on the other end of the magnet 10.

[0023] The handle 11 is an annular member provided at the upper end of the magnet 10. The handle 11 is used by the user to grip when holding the magnet 10. The handle 11 is made of a material including stainless steel, for example, stainless steel conforming to the Japanese Industrial Standards (JIS) SUS XM7. However, the material is not limited to this. The handle 11 may also be made of a non-magnetic material other than stainless steel.

[0024] The holding member 20 is a member attached to the magnet 10. The holding member 20 is made of a material including stainless steel, for example, stainless steel conforming to Japanese Industrial Standards (JIS) SUS XM7. However, the material is not limited to this. The holding member 20 may also be made of a non-magnetic material other than stainless steel. As shown in FIGS. 4 and 5, the holding member 20 has a flange 21, a magnet case 22, and a locking mechanism 23.

[0025] As shown in Fig. 9, the flange 21 is a disk-shaped member with an opening formed in the center for inserting the magnet 10. One surface of the flange 21 comes into contact with the floating part 100 when the holder part 2 is inserted into the opening 200a of the coolant tank 200. The flange 21 distributes and transmits the pressure applied by the weight of the holder part 2 to the floating part 100 and the coolant tank 200. As a result, the flange 21 suppresses damage to the floating part 100 and the coolant tank 200 caused by the weight of the holder part 2.

[0026] The magnet case 22 is a cylindrical member formed to cover the surface of the magnet 10 and having an opening for inserting one end of the magnet 10. The magnet case 22 protects the magnet 10 so that magnetic metal powder contained in the coolant inside the coolant tank 200 does not become magnetically attracted to the surface of the magnet 10 when the holder unit 2 is inserted into the opening 200a of the coolant tank 200 (supported on the upper surface). The magnet case 22 is fixed to one surface of the flange unit 21 so that the opening communicates with the opening of the flange unit 21. The magnet case 22 is formed by a main body unit 22a and upper and lower flanges 22b, 22c. The main body unit 22a is supported by the flange unit 21. The flange 22b is in contact with and supported by the flange unit 21. The flange 22c is used by a user to place their fingers when pulling the magnet 10 out of the holding member 20.

[0027] Locking mechanism 23 is provided on the other surface of flange 21, and secures handle 11 of magnet 10 inserted into the opening of flange 21. A groove 23a is formed on the side of locking mechanism 23, as shown in FIG. 8, into which the lower end of handle 11 can be fitted. Locking mechanism 23 attaches holding member 20 to magnet 10 by fitting the lower end of handle 11 into groove 23a.

[0028] As shown in FIG. 9, the floating part 100 is an annular member disposed between the upper surface of the coolant tank 200 and the lower surface of the flange 21 of the holder part 2. As shown in FIGS. 9 and 10, the floating part 100 includes a first case 110, a second case 120, a support member 130, and an end stopper 140. The first case 110 and the second case 120 are made of a material containing stainless steel, such as stainless steel conforming to Japanese Industrial Standards (JIS) SUS XM7. However, this is not a limitation. The first case 110 and the second case 120 may be made of a non-magnetic material other than stainless steel, as long as they are not easily magnetized and are not magnetically attracted to the holder part 2.

[0029] The first case 110 is a hollow annular member with an opening formed at the top. The first case 110 is formed with a first insertion hole 111 and a first hole portion 112. The first case 110 further has a bottom surface 113, a first inner peripheral side wall 114, and a first outer peripheral side wall 115.

[0030] The first insertion hole 111 is a hole for inserting the magnet case 22 of the holder part 2. The first insertion hole 111 is formed in the center of the ring of the first case 110. The opening 111a of the first insertion hole 111 is formed to have a gap between it and the magnet case 22, so that the iron powder magnetically attracted to the magnet case 22 does not come into contact with it. This prevents the magnetically attracted iron powder from falling when the magnet case 22 is pulled out.

[0031] The first hole 112 is a hole through which the lower end of the end stopper 140 passes, allowing the lower end of the end stopper 140 to protrude from the lower surface of the first case 110.

[0032] The bottom surface 113 is an annular portion in which the opening 111a of the first insertion hole 111 and the first hole portion 112 are formed. The bottom surface 113 is disposed on the upper surface of the coolant tank 200.

[0033] The first inner peripheral side wall 114 is a side wall formed in a cylindrical shape along the periphery of the opening 111a of the bottom surface 113. The first inner peripheral side wall 114 constitutes the inner wall of the first insertion hole 111.

[0034] The first outer peripheral sidewall 115 is a sidewall formed in a cylindrical shape along the outer periphery of the bottom surface 113. The vertical width of the first outer peripheral sidewall 115 is greater than the vertical width of the first inner peripheral sidewall 114.

[0035] The opening of the first case 110 is tapered so that the diameter decreases as the opening surface approaches downward, since the vertical width of the first outer peripheral side wall 115 is smaller than the vertical width of the first inner peripheral side wall 114.

[0036] The second case 120 is a hollow annular member with an opening formed at the bottom. The second case 120 is combined with the first case 110 to close the opening of the first case 110, thereby forming a hollow annular member. When combined with the first case 110, the second case 120 is supported by the support member 130 so as to be able to swing up and down. When pressure is applied, the second case 120 functions as a float member that swings up and down due to the pressure. The second case 120 is formed with a second insertion hole 121 and a second hole portion 122. Furthermore, the second case 120 has a top surface 123, a second inner peripheral side wall 124, a second outer peripheral side wall 125, and a washer 126.

[0037] The second insertion hole 121 is a hole for inserting the magnet case 22 of the holder part 2. The second insertion hole 121 is formed in the center of the ring of the second case 120. The second insertion hole 121 is formed so as to combine with the first insertion hole 111 to form a single insertion hole when the first case 110 and the second case 120 are combined to form a hollow annular member. The opening 121a of the second insertion hole 121 is formed so as to provide a gap between it and the magnet case 22, so that the magnetically attracted iron powder does not come into contact with the magnet case 22. This prevents the magnetically attracted iron powder from falling when the magnet case 22 is pulled out.

[0038] The second hole 122 is a hole through which the upper end of the support member 130 passes, allowing the upper end of the support member 130 to protrude from the upper surface of the second case 120.

[0039] The top surface 123 is an annular portion in which the opening 121a of the second insertion hole 121 and the second hole portion 122 are formed. On the upper surface of the top surface 123, the flange portion 21 of the holder portion 2 is placed.

[0040] The second inner circumferential side wall 124 is a cylindrical side wall formed along the periphery of the opening 121a of the top surface 123. The second inner circumferential side wall 124 constitutes the inner wall of the second insertion hole 121. The outer periphery of the cylindrical second inner circumferential side wall 124 is larger than the outer periphery of the cylindrical first inner circumferential side wall 114. When the first case 110 and the second case 120 are combined to form a hollow annular member, a portion of the cylindrical first inner circumferential side wall 114 is fitted inside the cylindrical second inner circumferential side wall 124, thereby suppressing lateral displacement. As a result, the second case 120 is less likely to come off the first case 110.

[0041] Second outer peripheral sidewall 125 is a sidewall formed in a cylindrical shape along the outer periphery of top surface 123. The outer periphery of cylindrical second outer peripheral sidewall 125 is larger than the outer periphery of cylindrical first outer peripheral sidewall 115. When first case 110 and second case 120 are combined to form a hollow annular member, a portion of cylindrical first outer peripheral sidewall 115 is incorporated inside cylindrical second outer peripheral sidewall 125, thereby suppressing lateral displacement.

[0042] The vertical width of the second outer peripheral sidewall 125 is smaller than the vertical width of the second inner peripheral sidewall 124. When pressure is applied to one point on the upper surface of the top surface 123 of the floating part 100, the outer periphery of the cylindrical second outer peripheral sidewall 125 is larger than the outer periphery of the cylindrical second inner peripheral sidewall 124, and therefore the vibration amplitude of the second outer peripheral sidewall 125 is larger than the vibration amplitude of the second inner peripheral sidewall 124. The vibration amplitude at each position of the second outer peripheral sidewall 125 becomes smaller the closer to the top surface 123. Therefore, the vertical width of the second outer peripheral sidewall 125 is formed to be smaller than the vertical width of the second inner peripheral sidewall 124 so that the vibration amplitude of the lower end of the second outer peripheral sidewall 125 and the vibration amplitude of the lower end of the second inner peripheral sidewall 124 are equal. As a result, the pressure applied to the top surface 123 is evenly distributed, and damage to the first case 110 and the second case 120 in the hollow annular member formed by combining the first case 110 and the second case 120 is suppressed.

[0043] Washer 126 is provided on the upper surface of top surface 123. Washer 126 is arranged so that the central hole and second hole portion 122 communicate with each other.

[0044] The first case 110 and the second case 120 are formed so that the shapes of their openings match. Specifically, the opening of the second case 120 has the second outer peripheral sidewall 125 lower than the second inner peripheral sidewall 124. Therefore, similar to the opening of the first case 110, when the first case 110 and the second case 120 are combined to form a hollow annular member, the opening surface is tapered such that the diameter decreases downward. Furthermore, the opening of the first case 110 and the second case 120 are formed so that the inclination of the tapered opening surface of the opening of the first case 110 and the inclination of the tapered opening surface of the opening of the second case 120 are approximately the same. As a result, when the first case 110 and the second case 120 are combined to form a hollow annular member, they are less likely to come apart.

[0045] The support member 130 is a member arranged on the upper surface of the coolant tank 200 via the first case 110. As shown in FIGS. 4 and 5, three support members 130 are provided at positions that surround the opening 121a of the second insertion hole 121 and are equidistant from each other. Furthermore, a portion of each support member 130 is provided at a position that protrudes above the second case 120 through the second hole portion 122. As shown in FIGS. 9 and 10, the support member 130 has an elastic body 131, a guide pin 132, and a marker pin 133.

[0046] Elastic body 131 is a coil-shaped compression spring that is provided between first case 110 and second case 120 and supports second case 120. The distance between first case 110 and second case 120 is kept constant by elastic body 131 when holder section 2 without a magnetic object is placed on second case 120 and in an unbiased state. When elastic body 131 is biased against second case 120, it supports second case 120 so that it can swing up and down.

[0047] The guide pin 132 is a guide member provided on the inner diameter side of the elastic body 131 to prevent twisting that occurs when the elastic body 131 expands and contracts. The guide pin 132 is provided such that the upper end of the guide pin 132 protrudes above the second case 120 from the second hole portion 122 of the second case 120. The lower end of the guide pin 132 is provided on the upper surface of the coolant tank 200 via the first case 110. The guide pin 132 has a thickness that does not contact the periphery of the second hole portion 122 and does not interfere with the second case 120.

[0048] The marker pin 133 is a bolt-shaped member provided at the upper end of the guide pin 132. The marker pin 133 is disposed inside the central hole of the washer 126. The side surface of the marker pin 133 serves as an indicator portion 133a that indicates a change in the position of the second case 120. Furthermore, the marker pin 133 is formed at a height such that when a holder unit 2 without a magnetic object is inserted through the first insertion hole 111 and the second insertion hole 121 and placed on the second case 120, the marker pin 133 is hidden by the central hole of the washer 126 and its side surface is not visible. The indicator portion 133a is colored red to make it easy to recognize the width from the top end of the marker pin 133 to the top end of the washer 126. However, this is not limited to this. The indicator portion 133a may be colored in any color that attracts the user's attention, for example, yellow.

[0049] The end stopper 140 is an expandable member provided on the first case 110. The lower end of the end stopper 140 protrudes downward from the floating part 100 through the first hole 112 and is used to fix the floating part 100 to the upper surface of the coolant tank 200. The end stopper 140 is fixed to a predetermined length. The upper end of the end stopper 140 abuts against the second case 120 when the second case 120 descends and the first case 110 and the second case 120 approach each other. In this way, the end stopper 140 determines the maximum amount of descent of the second case 120. As shown in FIG. 12 , three end stoppers 140 are provided at equidistant positions surrounding the opening 111a of the first insertion hole 111.

[0050] The support member 130 and the end stopper 140 are protected by a hollow annular member formed by combining the first case 110 and the second case 120 together.

[0051] Next, a method of using the magnetic separator 1 will be described.

[0052] First, the user of the magnetic separator 1 fixes the floating part 100 to the upper surface of the coolant tank 200 as shown in Fig. 3. At this time, the user positions the floating part 100 so that the first insertion hole 111, the second insertion hole 121, and the opening 200a of the coolant tank 200 are substantially in communication with each other.

[0053] 3 to 5, the user holds the handle 11 and the flange 22c of the holder part 2 and inserts the magnet case 22, in which the magnet 10 is arranged, into the first insertion hole 111 and the second insertion hole 121. At this time, the magnet case 22 is guided to the opening 200a of the coolant tank 200 shown in FIG. 9 by the first inner circumferential side wall 114, which is the side wall of the first insertion hole 111, and the second inner circumferential side wall 124, which is the side wall of the second insertion hole 121.

[0054] Furthermore, the magnet case 22 with the magnet 10 disposed therein is inserted into the opening 200a of the coolant tank 200, and the flange 21 of the holder part 2 is placed on the top surface 123 of the second case 120 of the floating part 100 in order to have the holder part 2 supported by the second case 120. At this time, even if the flange 21 is magnetized by the magnet 10, the flange 21 is not magnetically attracted to the top surface 123 of the second case 120 because the first case 110 and the second case 120 are made of a material that is not magnetically attracted to the magnet 10.

[0055] When a user inserts the holder unit 2 into the opening 200a of the coolant tank 200, the magnet case 22 of the holder unit 2 may come into contact with the first inner peripheral side wall 114 of the first case 110, the bottom surface 113 where the opening 111a of the first insertion hole 111 is formed, the top surface 123 of the second case 120, and the second inner peripheral side wall 124. At this time, because the first case 110 and the second case 120 are made of a material that is not magnetically attracted to the magnet 10 inside the magnet case 22, the holder unit 2 is not magnetically attracted even when it comes into contact with the first inner peripheral side wall 114 of the first case 110, the bottom surface 113 where the opening 111a of the first insertion hole 111 is formed, the top surface 123 of the second case 120, and the second inner peripheral side wall 124, and therefore can be easily inserted or removed.

[0056] The magnet 10 inserted into the opening 200a of the coolant tank 200 is immersed in the coolant liquid in the coolant tank 200. The magnetic force of the magnet 10 causes the magnetic metal powder contained in the coolant liquid to be magnetically attracted to the magnet case 22 that covers the surface of the magnet 10. As a result, the magnetic metal powder contained in the coolant liquid is removed.

[0057] The holder part 2 becomes heavy due to the magnetic metal powder magnetically attached to the surface of the magnet case 22. Then, the holder part 2 moves in a descending direction D1 due to the weight of the magnetic metal powder. The underside of the flange part 21 of the holder part 2 comes into contact with the top surface 123 of the second case 120 shown in FIG. 9 and applies pressure evenly. The second case 120 moves in the descending direction D1 due to the pressure of the flange part 21 applied evenly to the top surface 123. Then, the washer 126 of the second case 120 also moves in the descending direction D1.

[0058] The elastic body 131 supporting the second case 120 is compressed in the descending direction D1 of the second case 120 by the second case 120 moving in the descending direction D1. As shown in FIGS. 4 and 5, the three support members 130 surround the opening 121a of the second insertion hole 121 and are provided at positions equidistant from each other. Therefore, it is desirable that pressure from the second case 120 be applied evenly to the elastic body 131 of the support member 130 shown in FIGS. 9 and 10. It is also desirable that the compression amounts of the three elastic bodies 131 are equal.

[0059] The guide pin 132 of the support member 130 does not move even when the second case 120 moves in the descending direction D1 because it does not interfere with the second case 120. Furthermore, the marker pin 133 of the support member 130, whose side surface is covered by the washer 126, also does not move because it is provided at the upper end of the guide pin 132. Therefore, when the second case 120 moves in the descending direction D1, the indicator portion 133a provided on the side surface of the marker pin 133 becomes exposed from the washer 126 as the washer 126 moves in the descending direction D1. The indicator portion 133a becomes exposed from the washer 126 to the extent that magnetic metal powder is magnetically attracted to the magnet case 22 that covers the surface of the magnet 10.

[0060] The user visually checks the indicator portion 133a of the marker pin 133 exposed from the washer 126 shown in FIG. 13 and confirms the width from the top end of the marker pin 133 to the top end of the washer 126. The width from the top end of the marker pin 133 to the top end of the washer 126 indicates the amount of descent of the second case 120. The amount of descent of the second case 120 increases as the amount of magnetic metal powder magnetically attracted to the magnet case 22 increases. Therefore, the user can know the amount of magnetic metal powder magnetically attracted from the amount of descent of the second case 120. When the amount of descent of the second case 120 reaches a predetermined amount, the user determines that the magnetic force of the magnet 10 has decreased due to the magnetically attracted magnetic metal powder, and removes the holder portion 2.

[0061] 9, the user grasps the handle 11 of the holder part 2 and removes the holder part 2 from the opening 200a of the coolant tank 200, the first insertion hole 111, and the second insertion hole 121. When the user removes the holder part 2 from the opening 200a of the coolant tank 200, the magnet 10 of the holder part 2 may come into contact with the first inner circumferential side wall 114 of the first case 110, the bottom surface 113 where the opening 111a of the first insertion hole 111 is formed, the top surface 123 of the second case 120, and the second inner circumferential side wall 124. At this time, since the first case 110 and the second case 120 are made of a material that is not magnetically attracted to the magnet 10 of the holder part 2, the holder part 2 is not magnetically attracted even when it comes into contact with the first inner side wall 114, the second inner side wall 124, the top surface 123, and the bottom surface 113 of the second case 120 on which the opening of the first insertion hole 111 is formed, so that it can be easily inserted and removed.

[0062] A gap is provided between the opening 111a of the first insertion hole 111 and the opening 121a of the second insertion hole 121 and the magnet case 22, so that the iron powder magnetically attracted to the magnet case 22 does not come into contact with the opening 111a and the magnet case 22. This prevents the magnetically attracted iron powder from falling when the user removes the holder part 2.

[0063] When the holder part 2 is removed, the second case 120 of the floating part 100, which had been pressed down by the flange part 21 of the holder part 2, moves due to the elastic force of the elastic body 131 to the height it had before the holder part 2 was inserted, as shown in Figure 11.

[0064] The user removes the holding member 20 from the magnet 10 of the removed holder unit 2. At this time, as shown in FIG. 8, the user twists the handle 11 of the holder unit 2 in the rotation direction D2 to remove the handle 11 from the groove 23a of the locking mechanism 23, and then grips the handle 11 to pull the magnet 10 shown in FIG. 7 out of the holding member 20. As a result, the magnetic force that had been magnetically attracting the magnetic metal powder to the magnet case 22 shown in FIG. 4 is lost, and the magnetic metal powder that had been magnetically attracted to the magnet case 22 falls due to gravity, and is removed from the magnet case 22. Thereafter, the user attaches the holding member 20 shown in FIG. 9 to the magnet 10 shown in FIG. 7 again, and then inserts the holder unit 2 into the first insertion hole 111, the second insertion hole 121, and the opening 200a of the coolant tank 200 for reuse.

[0065] As explained above, in this embodiment, the more magnetic metal powder magnetically attracts to the magnet case 22 covering the surface of the magnet 10 in the holder part 2, the more the second case 120 descends, and the width between the upper end of the marker pin 133 of the support member 130 and the upper end of the washer 126 of the second case 120 increases. As a result, the indicator part 133a of the marker pin 133 becomes exposed, indicating the amount of descent of the second case 120 and the amount of magnetic metal powder magnetically attracted to the surface of the magnet case 22. In this way, in this embodiment, it is possible to provide a magnet separator 1 that indicates the amount of magnetic metal powder magnetically attracted to the magnet 10 and the magnet case 22 without removing the magnet 10 and the magnet case 22.

[0066] Also, when there is no need for the user to indicate the amount of magnetic metal powder magnetically attached to the surface of the magnet case 22, the user can use the holder part 2 by removing the floating part 100 and directly inserting it into the opening 200a of the coolant tank 200. Furthermore, the user may also remove the holding member 20 of the holder part 2 and directly insert the holder part 2 into the opening 200a of the coolant tank 200.

[0067] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

[0068] In the above embodiment, the surface of the magnet 10 in the holder part 2 is covered with the magnet case 22, and the magnet 10 is not directly immersed in the coolant liquid in the coolant tank 200. However, this is not limiting, and the magnet 10 may be directly immersed in the coolant liquid in the coolant tank 200 without providing the magnet case 22.

[0069] In the above embodiment, the magnet 10 of the holder part 2 is a bar magnet. However, the magnet 10 is not limited to this, and may be any magnet that magnetically attracts magnetic metal powder contained in the coolant liquid in the coolant tank 200. For example, the magnet 10 may be a magnet attached to the tip of a rod-shaped member. Alternatively, the magnet 10 may be an electromagnet provided inside the magnet case 22.

[0070] In the above embodiment, the floating section 100 includes the first case 110, which is a hollow annular member having an opening formed at the top. However, the present invention is not limited to this, and the floating section 100 does not necessarily have to include the first case 110.

[0071] In the above embodiment, floating unit 100 includes second case 120 on which flange 21 of holder unit 2 is placed on the upper surface of top surface 123 and supported by elastic body 131. However, this is not limiting, and flange 21 of holder unit 2 may be directly supported by elastic body 131. In this case, floating unit 100 does not need to include second case 120.

[0072] In the above embodiment, the marker pin 133 is provided at the upper end of the guide pin 132 of the support member 130. However, the marker pin 133 is not limited to this and may be any member that can indicate the amount of descent of the second case 120. For example, the marker pin 133 may be a columnar member that is provided on the upper surface of the coolant tank 200 and has a scale that indicates the amount of descent of the second case 120.

[0073] In the above embodiment, the floating part 100 is fixed directly to the upper surface of the coolant tank 200 by the end stopper 140. However, this is not limiting, and as shown in Fig. 14, a mounting plate 150 may be provided on the upper surface of the coolant tank 200, and the floating part 100 may be fixed to the mounting plate 150.

[0074] In the above embodiment, there are three first holes 112, three support members 130, and three elastic bodies 131 formed in the top surface 123 of the second case 120. However, the number of first holes 112, three support members 130, and three elastic bodies 131 may be two, four, or more.

[0075] In the above embodiment, there are three second holes 122 and three end stoppers 140 formed in the bottom surface of the first case 110. However, the number of second holes 122 and end stoppers 140 is not limited to this, and may be two, four, or more.

[0076] In the above embodiment, the second case 120 and the first case 110 are annular members. However, the second case 120 and the first case 110 are not limited to this and may be members having a shape that protects the support member 130 and the end stopper 140 and allows the flange portion 21 to be placed on the upper surface of the second case 120.

[0077] In the above embodiment, three support members 130 are provided at positions that surround the opening 121a of the second insertion hole 121 and are equidistant from one another, as shown in Figures 4 and 5. However, this is not limited to this. There may be provided one support member 130 that includes an elastic body 131 with a large inner diameter on the inner diameter side of the coil, where the first insertion hole 111 and the second insertion hole 121 are located.

[0078] In the above embodiment, the width from the upper end of marker pin 133 to the upper end of washer 126, which can be confirmed by visually checking index portion 133a of marker pin 133, indicates the amount of descent of second case 120. Index portion 133a of marker pin 133 may be provided with a scale indicating the amount of descent of second case 120.

[0079] The present invention allows various embodiments and modifications without departing from the broad spirit and scope of the present invention. The above-described embodiments are for the purpose of explaining the present invention and are not intended to limit the scope of the present invention. [Explanation of symbols]

[0080] 1 Magnetic separator 2 Holder part 10. Magnets 11 Handle 20 Holding member 21 Tsuba 22 Magnet case 22a Main body 22b, 22c Tsuba 23 Locking mechanism 23a Groove 100 Floating section 110 Case 1 111 First insertion hole 111a aperture 112 1st hole 113 bottom 114 First inner side wall 115 First outer wall 120 Case 2 121 Second insertion hole 121a aperture 122 2nd hole 123 Top 124 Second inner peripheral side wall 125 Second outer wall 126 Washer 130 Support member 131 Elastic Body 132 Guide pin 133 Marker pin 133a Index section 140 End stopper 150 Mounting Plate 200 Coolant Tank 200a aperture S liquid level D1 direction D2 Rotation direction

Claims

1. a magnet that is inserted into an opening provided on the top surface of the coolant tank and that magnetically attracts magnetic metal powder contained in the coolant liquid inside the coolant tank; a magnet case for protecting the magnet; a support member having an elastic body and disposed on an upper surface of the coolant tank; a float member that supports the magnet and the magnet case, has its lower surface supported by the elastic body, and descends together with the magnet and the magnet case due to the weight of the magnetic metal powder magnetically attached to the magnet and the magnet case; an indicator portion that indicates the amount of descent of the float member; A magnetic separator comprising:

2. the magnet is a bar magnet, 2. The magnetic separator according to claim 1, wherein the magnet case is formed in a cylindrical shape that covers the surface of the bar magnet, and at least one end of the magnet case is immersed in the coolant liquid.

3. the float member is an annular member having a first insertion hole formed in the center thereof through which the magnet and the magnet case are inserted, the magnet case has a flange portion, 3. The magnetic separator according to claim 1, wherein the flange is placed on an upper surface of the float member.

4. The magnetic separator according to claim 3 , wherein a plurality of the support members are provided at positions surrounding the first insertion hole.

5. a ring-shaped non-magnetic case disposed on an upper surface of the coolant tank, having an opening that opens upward and a second insertion hole formed in the center, through which the magnet and the magnet case are inserted; an end stopper that defines the maximum amount of descent of the float member; Further provided with the support member and the end stopper are provided inside the non-magnetic case, 5. The magnetic separator according to claim 1, wherein the float member closes the opening, thereby covering the non-magnetic case, the support member, and the end stopper.

6. The magnetic separator according to claim 1 , wherein the elastic body is a compression spring.

7. the support member has a guide pin whose upper end protrudes from the upper surface of the float member, and a marker pin provided at the upper end of the guide pin, The magnetic separator according to claim 6 , wherein the indicator portion is provided on a side surface of the marker pin.

8. 8. The magnetic separator according to claim 7, wherein the float member further comprises a washer that covers the indicator portion.

9. 9. The magnetic separator according to claim 1, wherein the float member is made of a non-magnetic material.

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