Coating apparatus and coating method

Abstract

To provide a technique capable of applying a viscous fluid to a threaded member with a simpler structure.SOLUTION: A coating apparatus includes a body part having: a hole portion provided with an insertion hole into which a threaded member is inserted; and a supply hole which is connected to the hole portion, and through which a viscous fluid to be applied to the threaded member is pressure-fed. A vertical groove is formed along the longitudinal direction of the hole portion on an inner wall forming the hole portion.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a coating device and a coating method.

Background Art

[0002] For the purpose of preventing seizure of screw members, etc., a viscous fluid such as grease may be applied to screw grooves. Patent Document 1 discloses an anti-seizure lubricant application device that applies a lubricant to a bolt screw part by rotating a brush supplied with a lubricant at its tip around the bolt screw part.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described technique, a motor for rotating the brush is required, and the structure of the coating device becomes complicated.

[0005] The present invention has been made in consideration of such circumstances, and an object thereof is to provide a technique capable of applying a viscous fluid to a screw member with a simpler structure.

Means for Solving the Problems

[0006] A first aspect of the present disclosure is a coating device having a main body portion provided with a hole portion in which an insertion hole for inserting a screw member is provided, and a supply hole that is connected to the hole portion and through which a viscous fluid to be applied to the screw member is pressure-fed, wherein a longitudinal groove is provided along the longitudinal direction of the hole portion on an inner wall forming the hole portion, which is a coating device.

[0007] In a second aspect of the present disclosure, in the coating device according to the first aspect described above, the longitudinal groove may be provided at a position away from the insertion hole.

[0008] In a third aspect of the present disclosure, in the coating device according to the first aspect or the second aspect described above, the supply hole may open in the longitudinal groove.

[0009] In a fourth aspect of the present disclosure, in the coating device according to each of the first aspect to the third aspect described above, a discharge hole for discharging the viscous fluid may be provided on the side of the hole portion opposite to the side into which the screw member is inserted.

[0010] In a fifth aspect of the present disclosure, in the coating device according to the fourth aspect described above, the coating device further includes a support portion that supports the main body portion. The support portion is provided on the discharge hole side of the hole portion and has a columnar member whose upper surface has an area smaller than that of the discharge hole. The viscous fluid may be discharged from a gap between the discharge hole and the upper surface of the columnar member.

[0011] In a sixth aspect of the present disclosure, in the coating device according to the fifth aspect described above, the upper surface of the columnar member may be located between the longitudinal groove and the discharge hole in the longitudinal direction.

[0012] In a seventh aspect of the present disclosure, in the coating device according to each of the first aspect to the sixth aspect described above, when the width of the insertion hole is w1, the distance from the axis of the screw member to the top of the thread is w2, and the depth of the thread groove of the screw member is w3, the following formula (1) may be satisfied.

Equation

[0013] In an eighth aspect of the present disclosure, in the coating device according to each of the first to seventh aspects described above, the supply hole may be located at the center of the hole portion in the longitudinal direction.

[0014] In a ninth aspect of the present disclosure, in the coating device according to each of the first to eighth aspects described above, the supply hole may open at a position separated from both ends of the hole portion by a distance of 0.2 times or more the length of the hole portion in the longitudinal direction.

[0015] In a tenth aspect of the present disclosure, in the coating device according to each of the first to ninth aspects described above, the area of the longitudinal groove in a cross section perpendicular to the longitudinal direction may be smaller than the area of the thread groove of the screw member in a cross section passing through the axis of the screw member.

[0016] In an eleventh aspect of the present disclosure, in the coating device according to each of the first to tenth aspects described above, in the direction in which the screw member is inserted into the insertion hole, the distance between the upper end of the longitudinal groove on the inner wall forming the hole portion and the insertion hole may be equal to or greater than the pitch length of the thread of the screw member.

[0017] In a twelfth aspect of the present disclosure, in the coating device according to each of the fourth to sixth aspects described above, when the width of the discharge hole is w4, the distance from the axis of the screw member to the apex of the thread is w2, and the depth of the thread groove of the screw member is w3, the following formula (2) may hold.

Equation

[0018] A thirteenth aspect of the present disclosure is a coating method for applying a viscous fluid to a screw member using a coating device, The coating device has a main body portion provided with a hole portion in which an insertion hole for inserting a screw member is provided, and a supply hole connected to the hole portion through which a viscous fluid to be applied to the screw member is pumped. On the inner wall forming the hole portion, a longitudinal groove is provided along the longitudinal direction of the hole portion. The coating method includes a step of inserting the screw member into the insertion hole and a step of pressure-feeding the viscous fluid into the supply hole.

Advantages of the Invention

[0019] According to the present invention, it is possible to provide a technique for coating a viscous fluid on a screw member with a simpler structure.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0021] Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a configuration example of the coating device 1. FIG. 2 is an exploded view showing the elements constituting the coating device 1 separately.

[0022] As shown in FIGS. 1 and 2, the coating device 1 has a main body portion 10. In the main body portion 10, a hole portion 20 provided with an insertion hole 21 and a supply hole 30 connected to the hole portion 20 are provided. By inserting a screw member 50, which will be described later, into the hole portion 20 through the insertion hole 21 and pumping the viscous fluid 60 into the supply hole 30, the viscous fluid 60 can be applied to the screw member 50.

[0023] In the example shown in FIG. 1, the main body portion 10 has a substantially rectangular parallelepiped shape. The hole portion 20 provided in the main body portion 10 extends in one direction. In the example shown in FIG. 1, the hole portion 20 extends in the longitudinal direction of the substantially rectangular parallelepiped main body portion 10. The direction in which the hole portion 20 extends is referred to as the longitudinal direction DA of the hole portion 20. Based on the center of the hole portion 20 in the longitudinal direction DA, the side on which the insertion hole 21 is located is referred to as the first side SA1. The side opposite to the first side SA1 in the longitudinal direction DA is referred to as the second side SA2. The screw member 50 is inserted into the hole portion 20 through the insertion hole 21 from the first side SA1. In the present embodiment, the hole portion 20 has a substantially cylindrical shape extending in the longitudinal direction DA.

[0024] The hole portion 20 is provided with an insertion hole 21 into which the screw member 50 is inserted. The insertion hole 21 is an opening that opens on the surface of the main body portion 10. In the example shown in FIG. 1, the insertion hole 21 opens in one of the surfaces of the substantially rectangular parallelepiped main body portion 10. In the present embodiment, the insertion hole 21 is circular when observed from the longitudinal direction DA.

[0025] In the present embodiment, a discharge hole 23 for discharging the viscous fluid 60 is provided on the side of the hole portion 20 opposite to the side into which the screw member 50 is inserted (second side SA2 in the longitudinal direction DA). The dashed line shown in FIG. 1 is a virtual line showing the general shape of the hole portion 20. In the example shown in FIG. 1, with respect to the hole portion 20, the shape of the longitudinal groove 22 described later and the like are omitted from the illustration, and only the general shape of the hole portion 20 is shown. The discharge hole 23 is an opening that opens on the surface of the main body portion 10. In the example shown in FIG. 1, the discharge hole 23 opens on the surface of the substantially rectangular parallelepiped main body portion 10 that faces the surface provided with the insertion hole 21 in the longitudinal direction DA. In the present embodiment, the discharge hole 23 is circular when observed from the longitudinal direction DA. In the example shown in FIG. 1, since the insertion hole 21 and the discharge hole 23 are provided in the hole portion 20, the hole portion 20 is a through hole.

[0026] In the examples shown in FIGS. 1 and 2, the main body portion 10 includes three members: a central portion 11, a first plugging portion 12, and a second plugging portion 13. The first plugging portion 12 is located on the first side SA1 of the central portion 11. The second plugging portion 13 is located on the second side SA2 of the central portion 11. In the example shown in FIG. 2, each of the central portion 11, the first plugging portion 12, and the second plugging portion 13 is provided with a through hole extending in the longitudinal direction DA. The through hole of the central portion 11, the through hole of the first plugging portion 12, and the through hole of the second plugging portion 13 overlap to form the through hole, which is the hole portion 20. The opening of the through hole of the first plugging portion 12 forms the insertion hole 21. The opening of the through hole of the second plugging portion 13 forms the discharge hole 23.

[0027] FIG. 3 is a perspective view showing the main body 10 of the coating apparatus 1 of the present embodiment cut along a plane parallel to the longitudinal direction DA and passing through the center of the hole 20, together with a support portion 40 described later. In FIG. 3, among the four connecting portions 43 of the support portion 40 described later, illustration of the two connecting portions 43 located in the front in the drawing is omitted. FIG. 4 is a cross-sectional view showing the coating apparatus 1 of the present embodiment cut along a plane parallel to the longitudinal direction DA and passing through the center of the hole 20, together with a screw member 50 inserted into the hole 20 and a viscous fluid 60 applied to the screw member 50. In FIG. 4, a cross-section passing through the axis LA of the screw member 50 appears as the cross-section of the screw member 50. FIG. 5 is a cross-sectional view showing the coating apparatus 1 shown in FIG. 4 cut along the line V-V.

[0028] As shown in FIG. 3, a longitudinal groove 22 is provided in the inner wall 20a forming the hole 20 along the longitudinal direction DA of the hole 20. At least one longitudinal groove 22 is provided in the inner wall 20a. As an example, a plurality of longitudinal grooves 22 are provided in the inner wall 20a. As an example, the plurality of longitudinal grooves are arranged at equal intervals along the spreading direction of the inner wall 20a. In the example shown in FIG. 5, four longitudinal grooves 22 are provided in the inner wall 20a.

[0029] In the example shown in FIG. 3, the longitudinal groove 22 is provided at a position away from the insertion hole 21. In addition, the longitudinal groove 22 is provided at a position away from the discharge hole 23. In the example shown in FIG. 3, the longitudinal groove 22 is provided in the central portion 11. No longitudinal groove 22 is provided in the first closing portion 12. As a result, the longitudinal groove 22 is separated from the insertion hole 21 by the dimension of the first closing portion 12 in the longitudinal direction DA. Further, no longitudinal groove 22 is provided in the second closing portion 13. As a result, the longitudinal groove 22 is separated from the discharge hole 23 by the dimension of the second closing portion 13 in the longitudinal direction DA.

[0030] Since the main body part 10 includes three members, namely a central part 11, a first plugging part 12, and a second plugging part 13, when manufacturing the coating device 1, a hole part 20 with a complex shape can be easily formed. In particular, a hole part 20 provided with a longitudinal groove 22 at a position away from the insertion hole 21 and the discharge hole 23 can be easily formed.

[0031] When the main body part 10 includes three members, namely a central part 11, a first plugging part 12, and a second plugging part 13, the materials of each of the central part 11, the first plugging part 12, and the second plugging part 13 may be different. The materials of each of the central part 11, the first plugging part 12, and the second plugging part 13 can be appropriately selected in consideration of the physical properties required when applying the viscous fluid 60 to the screw member 50 using the coating device 1 and the ease of processing.

[0032] As shown in FIG. 3, a supply hole 30 communicating with the hole part 20 is provided in the main body part 10. In the example shown in FIG. 3, one supply hole 30 is provided in the main body part 10. The viscous fluid 60 to be applied to the screw member 50 is pressure-fed to the supply hole 30. That is, the viscous fluid 60 to be applied to the screw member 50 is pressurized and sent out to the supply hole 30. As a result, the viscous fluid 60 pressure-fed to the supply hole 30 is further sent out to the hole part 20. As described above, as shown in FIG. 4, the viscous fluid 60 is applied to the screw member 50. In the example shown in FIG. 3, the supply hole 30 is a through hole penetrating from the inner wall 20a to the outer wall 10a of the main body part 10. In this case, using a pump (not shown), the viscous fluid 60 can be pressure-fed to the supply hole 30 through the opening on the outer wall 10a. In this case, the coating device 1 may further include a pump for pressure-feeding the viscous fluid 60 to the supply hole 30.

[0033] In the example shown in FIG. 3, the supply hole 30 opens in the longitudinal groove 22. As a result, the viscous fluid 60 pressure-fed to the supply hole 30 is sent out to the longitudinal groove 22.

[0034] As an example, the supply hole 30 opens in the inner wall 20a at a position separated from both ends of the hole portion 20 by a distance of 0.2 times or more the length of the hole portion 20 in the longitudinal direction DA. That is, the distance w5 between the end of the first side SA1 of the hole portion 20 shown in FIG. 4 and the supply hole 30, and the distance w6 between the end of the second side SA2 of the hole portion 20 and the supply hole 30 are 0.2 times or more the length w7 of the hole portion 20 in the longitudinal direction DA.

[0035] As an example, the supply hole 30 is located at the center of the hole portion 20 in the longitudinal direction DA. That is, as shown in FIG. 4, a virtual plane (the plane located at the position of the dashed-dotted line with reference numeral F1) having equal distances from both ends of the hole portion 20 in the longitudinal direction DA passes through the opening in the inner wall 20a of the supply hole 30.

[0036] The coating device 1 of the present embodiment has a columnar member 41 provided on the discharge hole 23 side (second side SA2) of the hole portion 20. In the example shown in FIGS. 1 to 4, the coating device 1 further includes a support portion 40 that supports the main body portion 10. The support portion 40 has a columnar member 41 provided on the discharge hole 23 side of the hole portion 20. Thus, the coating device 1 has the columnar member 41. In the example shown in FIG. 3, the columnar member 41 has a cylindrical shape extending in the longitudinal direction DA.

[0037] In the example shown in FIG. 4, a part of the columnar member 41 is inserted into the hole portion 20 through the discharge hole 23. The upper surface 41a of the columnar member 41 has an area smaller than that of the discharge hole 23. The upper surface 41a of the columnar member 41 is the surface of the columnar member 41 on the first side SA1. Since the upper surface 41a of the columnar member 41 has an area smaller than that of the discharge hole 23, a part of the columnar member 41 can be inserted into the hole portion 20 through the discharge hole 23. Further, a gap 23a is formed between the discharge hole 23 and the upper surface 41a of the columnar member 41. The coating device 1 of the present embodiment discharges the viscous fluid 60 from the gap 23a between the discharge hole 23 and the upper surface 41a of the columnar member 41.

[0038] In the example shown in FIG. 4, the upper surface 41a of the columnar member 41 is located between the longitudinal groove 22 and the discharge hole 23 in the longitudinal direction DA. The fact that the upper surface 41a is located between the longitudinal groove 22 and the discharge hole 23 includes the fact that the upper surface 41a is located at the position of the end of the second side SA2 of the longitudinal groove 22 in the longitudinal direction DA. In the example shown in FIG. 4, the upper surface 41a is located at the position of the end of the second side SA2 of the longitudinal groove 22 in the longitudinal direction DA. In the example shown in FIG. 4, the width of the hole portion 20 (the maximum width in the direction perpendicular to the longitudinal direction DA) at the position of the upper surface 41a in the longitudinal direction DA is equal to the width w4 of the discharge hole 23 described later.

[0039] In the example shown in FIG. 4, the support portion 40 has the columnar member 41 and also has the pedestal portion 42 and the connecting portion 43. The pedestal portion 42 is a member that forms a surface in contact with the placement surface when the coating device 1 is placed on the placement surface. In the example shown in FIG. 4, the pedestal portion 42 has a plate-like shape. The columnar member 41 is connected to the pedestal portion 42 at the end of the second side SA2. The connecting portion 43 is a member that connects the main body portion 10 and the pedestal portion 42. In the example shown in FIG. 4, the support portion 40 has a plurality of connecting portions 43. In the present embodiment, the support portion 40 has four connecting portions 43. In the present embodiment, each of the plurality of connecting portions 43 has a columnar shape extending in the longitudinal direction DA. Each of the plurality of connecting portions 43 is connected to the main body portion 10 at the end of the first side SA1. In the present embodiment, each of the plurality of connecting portions 43 is connected to the second closing portion 13 at the end of the first side SA1. Further, each of the plurality of connecting portions 43 is connected to the pedestal portion 42 at the end of the second side SA2. Thus, the plurality of connecting portions 43 connect the main body portion 10 and the pedestal portion 42. By the connecting portion 43 connecting the main body portion 10 and the pedestal portion 42 and the columnar member 41 being connected to the pedestal portion 42, the position of the columnar member 41 with respect to the main body portion 10 is fixed.

[0040] The viscous fluid 60 applied to the screw member 50 using the coating device 1 will be described. The viscous fluid 60 applied to the screw member 50 is not particularly limited as long as it has a viscosity that can be applied to the screw member 50. The viscous fluid 60 is, for example, grease. Here, grease is defined according to the description in JIS K 2220:2013. That is, grease is a material in which a thickener is dispersed in a base oil to form a semi-solid or solid state. Examples of the viscous fluid 60 other than grease include adhesives and paints.

[0041] The screw member 50, which is the object to which the viscous fluid 60 is applied using the coating device 1, will be described. The screw member 50 is a member having an external thread. The screw member 50 is not particularly limited as long as it has an external thread and is a member to which the viscous fluid 60 is required to be applied. As an example, the screw member 50 is a member that delivers grease to a portion of a device that uses grease where grease supply is required. In this case, the screw member 50 is removed from the device that uses grease, grease is applied as the viscous fluid 60 to the screw member 50 using the coating device 1, and then the screw member 50 is attached again to the device that uses grease. Thereby, grease can be applied to the screw member 50 for delivery to the portion where grease supply is required. As an example, the device that uses grease is a brake unit, particularly a brake unit used for railway vehicle brakes. In this case, the portion where grease supply is required can be the friction material of the brake unit. In addition, the screw member 50 can be a member that delivers grease to the friction material of the brake unit.

[0042] The screw member 50 has a thread 51 and a thread groove 52. In a cross-section passing through the axis LA of the screw member 50 as shown in FIG. 4, the thread 51 and the thread groove 52 appear alternately along the direction in which the axis LA extends. As an example, the screw member 50 has a multi-start thread. The screw member 50 may have a single-start thread.

[0043] Let the width of the insertion hole 21 be w1. More specifically, the width w1 of the insertion hole 21 is the maximum width of the insertion hole 21 in a direction perpendicular to the longitudinal direction DA. Let the distance from the axis LA of the screw member 50 to the apex 511 of the thread 51 be w2. Let the depth of the thread groove 52 of the screw member 50 be w3. More specifically, the depth w3 is the distance between the position of the apex 511 of the thread 51 and the position of the bottom 521 of the thread groove 52 in a direction perpendicular to the axis LA. At this time, the following formula (1) may hold among the width w1 of the insertion hole 21, the distance w2 from the axis LA of the screw member 50 to the apex 511 of the thread 51, and the depth w3 of the thread groove 52 of the screw member 50.

Number

[0044] Furthermore, let the width of the discharge hole 23 be w4. More specifically, the width w4 of the discharge hole 23 is the maximum width of the discharge hole 23 in a direction perpendicular to the longitudinal direction DA. At this time, the following formula (2) may hold among the width w4 of the discharge hole 23, the distance w2 from the axis LA of the screw member 50 to the apex 511 of the thread 51, and the depth w3 of the thread groove 52 of the screw member 50.

Number

[0045] In the example shown in FIG. 4, the width w1 of the insertion hole 21, the width w4 of the discharge hole 23, and the width w10 of the hole portion 20 in the region where the longitudinal groove 22 is provided in the longitudinal direction DA (the maximum width excluding the longitudinal groove 22 in the direction perpendicular to the longitudinal direction DA) are equal to each other. Although not shown, the width w1 of the insertion hole 21 may be larger than the width w10 of the hole portion 20 in the region where the longitudinal groove 22 is provided in the longitudinal direction DA. In this case, the hole portion 20 may have a portion that becomes wider as it approaches the insertion hole 21 in the longitudinal direction DA near the insertion hole 21. In this case, in the vicinity of the insertion hole 21, since the inner wall 20a of the hole portion 20 has an inclined surface inclined with respect to the longitudinal direction DA, a portion that becomes wider as it approaches the insertion hole 21 in the longitudinal direction DA may be formed in the hole portion 20. In this case, the inclination angle of the inclined surface with respect to the plane perpendicular to the longitudinal direction DA is, for example, 45° or more and 60° or less. With the above characteristics, the insertion of the screw member 50 into the insertion hole 21 can be made easier.

[0046] The area of the longitudinal groove 22 in the cross section perpendicular to the longitudinal direction DA is smaller than the area of the thread groove 52 of the screw member 50 in the cross section passing through the axis LA of the screw member 50. FIG. 5 corresponds to a view showing a cross section of the coating device 1 perpendicular to the longitudinal direction DA. In FIG. 5, a cross section of the longitudinal groove 22 perpendicular to the longitudinal direction DA appears. The area of the longitudinal groove 22 described above is the area of the region surrounded by the surface of the longitudinal groove 22 appearing in the cross section perpendicular to the longitudinal direction DA as shown in FIG. 5 and the straight line L1 connecting the ends of the surfaces of the longitudinal groove 22 appearing in the cross section. In FIG. 4, a cross section passing through the axis LA of the screw member 50 appears. The area of the thread groove 52 described above is the area of the region surrounded by the surface of the thread groove 52 appearing in the cross section passing through the axis LA as shown in FIG. 4 and the straight line L2 connecting the ends of the surfaces of the thread groove 52 appearing in the cross section (the apexes 511 of the thread crests 51 adjacent to the thread groove 52).

[0047] In the direction in which the screw member 50 is inserted into the insertion hole 21, the distance w8 between the upper end 22a of the longitudinal groove 22 in the inner wall 20a forming the hole portion 20 and the insertion hole 21 is equal to or greater than the pitch length P1 of the thread 51 of the screw member 50. In the present embodiment, the direction in which the screw member 50 is inserted into the insertion hole 21 is the direction along the longitudinal direction DA. The upper end 22a of the longitudinal groove 22 is the end closer to the insertion hole 21 among both ends of the longitudinal groove 22. The pitch length P1 of the thread 51 is the distance between the centers of adjacent threads 51 in the direction in which the axis LA extends.

[0048] In the direction in which the screw member 50 is inserted into the insertion hole 21, the distance w11 between the end portion of the second side SA2 of the longitudinal groove 22 in the inner wall 20a forming the hole portion 20 and the discharge hole 23 may be equal to or greater than the pitch length P1 of the thread 51 of the screw member 50.

[0049] Next, a coating method for coating the screw member 50 with the viscous fluid 60 using the above-described coating device 1 will be described. The coating method of the present embodiment includes a step of inserting the screw member 50 into the insertion hole 21 and a step of pressure-feeding the viscous fluid 60 into the supply hole 30.

[0050] In the step of inserting the screw member 50 into the insertion hole 21, the screw member 50 is inserted into the hole portion 20 through the insertion hole 21. As a result, as shown in FIG. 4, at least a part of the thread 51 and the thread groove 52 of the screw member 50 are disposed in the hole portion 20.

[0051] The coating device 1 of the present embodiment has a columnar member 41 provided on the discharge hole 23 side of the hole portion 20. In this case, as an example, as shown in FIG. 4, the screw member 50 is inserted into the hole portion 20 such that the tip of the screw member 50 contacts the upper surface 41a of the columnar member 41. By having the columnar member 41 in the coating device 1, when the screw member 50 is inserted into the hole portion 20 such that the tip of the screw member 50 contacts the upper surface 41a of the columnar member 41, the position of the screw member 50 within the hole portion 20 is determined. By bringing the tip of the screw member 50 into contact with the upper surface 41a of the columnar member 41, the position of the upper surface 41a of the columnar member 41 with respect to the hole portion 20 can also be adjusted so that the screw member 50 is disposed at a preferable position for applying the viscous fluid 60. Thus, due to the action of the columnar member 41, the screw member 50 can be disposed at a preferable position for applying the viscous fluid 60.

[0052] In the coating device 1 of the present embodiment, the upper surface 41a of the columnar member 41 is located between the longitudinal groove 22 and the discharge hole 23 in the longitudinal direction DA. Thus, due to the action of the columnar member 41, the screw member 50 is disposed such that the tip is located between the longitudinal groove 22 and the discharge hole 23. Thereby, the screw member 50 is disposed to face the entire longitudinal groove 22. Thus, when the viscous fluid 60 is sent out to the hole portion 20 in the step of pumping the viscous fluid 60 to the supply hole 30 described later, it is possible to suppress the viscous fluid 60 from leaking from the discharge hole 23 through the longitudinal groove 22. In particular, in the coating device 1 of the present embodiment, the upper surface 41a is located at the position of the end of the second side SA2 of the longitudinal groove 22 in the longitudinal direction DA. Thus, due to the action of the columnar member 41, the screw member 50 is disposed such that the tip is located at the position of the end of the second side SA2 of the longitudinal groove 22. Thereby, in the step of pumping the viscous fluid 60 to the supply hole 30 described later, as the viscous fluid 60 moves through the longitudinal groove 22, the viscous fluid 60 can be uniformly applied to the screw member 50 including the vicinity of the tip of the screw member 50.

[0053] After the step of inserting the screw member 50 into the insertion hole 21, a step of pumping the viscous fluid 60 into the supply hole 30 is performed. By this step, the viscous fluid 60 pumped into the supply hole 30 is further sent out to the hole portion 20. The viscous fluid 60 sent out to the hole portion 20 fills the space between the inner wall 20a of the hole portion 20 and the surface of the screw member 50, as shown in FIG. 5. Thereby, the viscous fluid 60 can be applied to the screw member 50.

[0054] In the inner wall 20a forming the hole portion 20 of the coating device 1 of the present embodiment, a longitudinal groove 22 is provided along the longitudinal direction DA. For this reason, the viscous fluid 60 sent out to the hole portion 20 can move in a direction perpendicular to the longitudinal direction DA through the thread groove 52 of the screw member 50 and can move in the longitudinal direction DA through the longitudinal groove 22. Thereby, as shown in FIG. 5, the space between the inner wall 20a of the hole portion 20 and the surface of the screw member 50 can be filled with the viscous fluid 60. For this reason, the viscous fluid 60 can be applied to the screw member 50 without unevenness.

[0055] In the coating device 1 of the present embodiment, the supply hole 30 opens in the longitudinal groove 22. Thereby, the viscous fluid 60 sent out from the supply hole 30 to the hole portion 20 is first supplied to the longitudinal groove 22, then moves in the longitudinal direction DA through the longitudinal groove 22, and then moves to each thread groove 52. In this way, the viscous fluid 60 can be supplied to each thread groove 52 more uniformly. From the above, the viscous fluid 60 can be applied to the screw member 50 more uniformly.

[0056] In the coating device 1 of the present embodiment, the supply hole 30 opens at positions separated from both ends of the hole portion 20 by a distance of 0.2 times or more the length of the hole portion 20 in the longitudinal direction DA. That is, the distances w5 and w6 shown in FIG. 4 are 0.2 times or more the length w7. Thereby, the viscous fluid can be supplied to the longitudinal groove 22 uniformly. In particular, in the coating device 1 of the present embodiment, the supply hole 30 is located at the center of the hole portion 20 in the longitudinal direction DA. Thereby, the viscous fluid can be supplied to the longitudinal groove 22 more uniformly. From the above, the viscous fluid 60 can be applied to the screw member 50 more uniformly.

[0057] In the step of pumping the viscous fluid 60 into the supply hole 30, the pressure applied to the viscous fluid 60 is adjusted such that the space between the inner wall 20a of the hole portion 20 and the surface of the screw member 50 is filled with the viscous fluid 60 and the viscous fluid 60 does not leak from the insertion hole 21. The pressure applied to the viscous fluid 60 may be adjusted such that the viscous fluid 60 does not leak from the discharge hole 23.

[0058] In the coating device 1 of the present embodiment, the longitudinal groove 22 is provided at a position away from the insertion hole 21. For this reason, the longitudinal groove 22 is not directly connected to the insertion hole 21. Thereby, it is possible to suppress the viscous fluid 60 that moves in the longitudinal direction DA through the longitudinal groove 22 from directly moving from the longitudinal groove 22 to the insertion hole 21. From the above, it is possible to suppress the viscous fluid 60 that moves in the longitudinal direction DA through the longitudinal groove 22 from leaking from the insertion hole 21, and the viscous fluid 60 can be more uniformly applied to the screw member 50.

[0059] In the coating device 1 of the present embodiment, the longitudinal groove 22 is provided at a position away from the discharge hole 23. For this reason, the longitudinal groove 22 is not directly connected to the discharge hole 23. Thereby, it is possible to suppress the viscous fluid 60 that moves in the longitudinal direction DA through the longitudinal groove 22 from directly moving from the longitudinal groove 22 to the discharge hole 23. From the above, it is possible to suppress the viscous fluid 60 that moves in the longitudinal direction DA through the longitudinal groove 22 from leaking from the discharge hole 23, and the viscous fluid 60 can be more uniformly applied to the screw member 50.

[0060] Here, as an example, the following equation (1) holds among the width w1 of the insertion hole 21, the distance w2 from the axis LA of the screw member 50 to the apex 511 of the thread 51, and the depth w3 of the thread groove 52 of the screw member 50. As a result, the following effects can be obtained. When the screw member 50 is inserted into the hole portion 20 as shown in FIG. 4, the width w9 of the gap between the edge of the insertion hole 21 and the screw member 50 is expressed as w1 / 2 - w2. The width w9 of this gap becomes smaller than the depth w3 of the thread groove 52. For this reason, the viscous fluid 60 becomes more likely to move into the thread groove 52 and less likely to leak from the gap between the edge of the insertion hole 21 and the screw member 50. From the above, leakage of the viscous fluid 60 from the insertion hole 21 can be suppressed, and the viscous fluid 60 can be directed toward the thread groove 52 to uniformly apply the viscous fluid 60 to the screw member 50.

Number

[0061] Also, as an example, the following equation (2) holds among the width w4 of the discharge hole 23, the distance w2 from the axis LA of the screw member 50 to the apex 511 of the thread 51, and the depth w3 of the thread groove 52 of the screw member 50. As a result, the viscous fluid 60 becomes more likely to move into the thread groove 52 and less likely to leak from the gap between the inner wall 20a of the hole portion 20 near the discharge hole 23 and the screw member 50. From the above, leakage of the viscous fluid 60 from the discharge hole 23 can be suppressed, and the viscous fluid 60 can be directed toward the thread groove 52 to uniformly apply the viscous fluid 60 to the screw member 50.

Number

[0062] Also, as an example, in the direction in which the screw member 50 is inserted into the insertion hole 21, the distance w8 between the upper end 22a of the longitudinal groove 22 in the inner wall 20a forming the hole portion 20 and the insertion hole 21 is equal to or greater than the pitch length P1 of the thread 51 of the screw member 50. As a result, since the distance between the longitudinal groove 22 and the insertion hole 21 increases, it is possible to more effectively suppress the leakage of the viscous fluid 60 that moves in the longitudinal direction DA through the longitudinal groove 22 from the insertion hole 21. In particular, the portion of the inner wall 20a of the hole portion 20 where the longitudinal groove 22 is not provided between the insertion hole 21 and the longitudinal groove 22 faces the apex 511 of the thread 51 over a length equal to or greater than the pitch length P1 of the thread 51. Thereby, leakage of the viscous fluid 60 from the insertion hole 21 is suppressed, and the viscous fluid 60 can be more uniformly applied to the screw member 50.

[0063] Also, as an example, in the direction in which the screw member 50 is inserted into the insertion hole 21, the distance w11 between the end of the second side SA2 of the longitudinal groove 22 in the inner wall 20a forming the hole portion 20 and the discharge hole 23 is equal to or greater than the pitch length P1 of the thread 51 of the screw member 50. As a result, since the distance between the longitudinal groove 22 and the discharge hole 23 increases, it is possible to more effectively suppress the leakage of the viscous fluid 60 that moves in the longitudinal direction DA through the longitudinal groove 22 from the discharge hole 23. In particular, the portion of the inner wall 20a of the hole portion 20 where the longitudinal groove 22 is not provided between the discharge hole 23 and the longitudinal groove 22 faces the apex 511 of the thread 51 over a length equal to or greater than the pitch length P1 of the thread 51. Thereby, leakage of the viscous fluid 60 from the discharge hole 23 is suppressed, and the viscous fluid 60 can be more uniformly applied to the screw member 50.

[0064] Also, as an example, the area of the longitudinal groove 22 in a cross section perpendicular to the longitudinal direction DA is smaller than the area of the thread groove 52 of the screw member 50 in a cross section passing through the axis LA of the screw member 50. As a result, the viscous fluid 60 is more likely to move into the thread groove 52. From the above, the viscous fluid 60 can be directed to the thread groove 52, and the viscous fluid 60 can be more uniformly applied to the screw member 50.

[0065] After the step of pumping the viscous fluid 60 into the supply hole 30, the screw member 50 is pulled out from the hole portion 20. The coating device 1 of the present embodiment can be used repeatedly. That is, after applying the viscous fluid 60 to the first screw member 50 using the coating device 1, the viscous fluid 60 can be applied to the second screw member 50 using the coating device 1. The first screw member 50 and the second screw member 50 may be the same screw member 50. That is, after applying the viscous fluid 60 to the screw member 50, if the viscous fluid 60 on the surface of the screw member 50 decreases, the viscous fluid 60 may be applied to the screw member 50 again using the coating device 1. For example, as described above, when the screw member 50 is a member that delivers grease to a portion where grease supply is required in a device using grease, grease for delivery to a portion where grease supply is required can be repeatedly applied to the screw member 50. The first screw member 50 and the second screw member 50 may be different screw members 50. That is, after applying the viscous fluid 60 to the screw member 50, the viscous fluid 60 may be applied to a screw member 50 different from the screw member 50 to which the viscous fluid 60 has been applied.

[0066] Here, in the coating device 1 of the present embodiment, a discharge hole 23 for discharging the viscous fluid 60 is provided on the side opposite to the side into which the hole portion 20 and the screw member 50 are inserted. As a result, after pulling out the first screw member 50 coated with the viscous fluid 60 from the hole portion 20, when the second screw member 50 is inserted into the hole portion 20, the viscous fluid 60 sent to the hole portion 20 for applying to the first screw member 50 is discharged from the discharge hole 23 by the insertion of the second screw member 50. Therefore, it is possible to suppress a large amount of the old viscous fluid 60 sent out for coating the first screw member 50 from being applied to the second screw member 50. As a result, the quality of the viscous fluid 60 applied to the screw member 50 can be maintained high. For example, when the viscous fluid 60 is grease, the quality of the grease applied to the screw member 50 as a lubricant can be maintained high by the discharge hole 23. Further, since the old viscous fluid 60 can be discharged from the hole portion 20 through the discharge hole 23 without disassembling and cleaning the coating device 1, the maintenance of the coating device 1 becomes easy.

[0067] In particular, in the coating device 1 of the present embodiment, the upper surface 41a of the columnar member 41 has an area smaller than that of the discharge hole 23. For this reason, a gap 23a is formed between the discharge hole 23 and the upper surface 41a of the columnar member 41. Thereby, while the position of the screw member 50 in the hole portion 20 is determined by the columnar member 41, the viscous fluid 60 can be discharged from the gap 23a between the discharge hole 23 and the upper surface 41a of the columnar member 41. In particular, as shown in FIG. 4, since the columnar member 41 is fixed at a position where it does not contact the inner wall 20a of the hole portion 20, the gap 23a is formed so as to surround the upper surface 41a. Thereby, the viscous fluid 60 can be discharged more effectively from the gap 23a by inserting the screw member 50.

[0068] The coating device 1 of the present embodiment includes a support portion 40 that supports the main body portion 10. The support portion 40 has a columnar member 41 and also has a pedestal portion 42 and a connecting portion 43. Thereby, the position of the columnar member 41 with respect to the main body portion 10 can be fixed. Further, the viscous fluid 60 discharged from the discharge hole 23 can be received by the pedestal portion 42. Thereby, it is possible to suppress the viscous fluid 60 discharged from the discharge hole 23 from adhering to the outside of the coating device 1, such as on the mounting surface of the coating device 1.

[0069] The coating device 1 of the present embodiment is a coating device 1 having a hole portion 20 provided with an insertion hole 21 into which a screw member 50 is inserted, and a supply hole 30 that is connected to the hole portion 20 and to which a viscous fluid 60 to be applied to the screw member 50 is pumped. A vertical groove 22 is provided in the inner wall 20a forming the hole portion 20 along the longitudinal direction DA of the hole portion 20. Thereby, in the region where the vertical groove 22 is provided in the longitudinal direction DA, the viscous fluid 60 can be applied to the screw member 50 evenly. Further, the viscous fluid 60 can be applied to the screw member 50 without the need to rotate the coating device 1 with respect to the screw member 50 or rotate the screw member 50 with respect to the coating device 1. For this reason, the coating device 1 does not require a mechanism such as a motor for rotating the coating device 1 or the screw member 50. Thereby, according to the coating device 1 of the present embodiment, the viscous fluid 60 can be applied to the screw member 50 while making the coating device 1 have a simpler structure.

[0070] The coating method of this embodiment is a coating method for applying a viscous fluid 60 to a screw member 50 using a coating device 1. The coating method of this embodiment includes a step of inserting the screw member 50 into the insertion hole 21 and a step of pressure-feeding the viscous fluid 60 into the supply hole 30. According to the coating method of this embodiment, the viscous fluid 60 can be uniformly applied to the screw member 50 in the region where the longitudinal groove 22 is provided in the longitudinal direction DA. Furthermore, the viscous fluid 60 can be applied to the screw member 50 without the need to rotate the coating device 1 or the screw member 50.

[0071] As described above, an embodiment has been described with reference to specific examples, but the above-described specific examples are not intended to limit an embodiment. The above-described embodiment can be implemented with various other specific examples, and various omissions, replacements, and changes can be made without departing from the gist thereof.

[0072] Hereinafter, an example of a modification will be described with reference to the drawings. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above-described specific examples are used for the parts that can be configured in the same manner as the above-described specific examples, and redundant descriptions are omitted.

[0073] (Modification Example 1) In the above-described embodiment, an example in which one supply hole 30 is provided in the main body 10 was shown. However, the number of supply holes 30 is not limited to this. A plurality of supply holes 30 may be provided in the main body 10 of the coating device 1. FIG. 6 is a diagram showing an example of a cross section perpendicular to the longitudinal direction DA of the coating device 1 of Modification 1. In the example shown in FIG. 6, a plurality of supply holes 30 are provided in the main body 10. In the example shown in FIG. 6, two supply holes 30 are provided in the main body 10. In the example shown in FIG. 6, the plurality of supply holes 30 open in different vertical grooves 22. In the example shown in FIG. 6, the plurality of supply holes 30 include a first supply hole 30 that opens in the first vertical groove 22 and a second supply hole 30 that opens in a second vertical groove 22 different from the first vertical groove 22. Although not shown, the main body 10 may be provided with a plurality of supply holes 30 that open at different positions in the longitudinal direction DA of the same vertical groove 22. By providing a plurality of supply holes 30 in the main body 10, the viscous fluid 60 can be sent out more uniformly to the hole portion 20. Therefore, the viscous fluid 60 can be applied to the screw member 50 more uniformly.

[0074] When a plurality of supply holes 30 are provided in the main body 10, at least one of the plurality of supply holes 30 may have the characteristics regarding the opening position of the supply hole 30 described in the above embodiment, or all of the plurality of supply holes 30 may have them. For example, at least one of the plurality of supply holes 30 may open at a position separated by a distance of 0.2 times or more the length of the hole portion 20 in the longitudinal direction DA from both ends of the hole portion 20. All of the plurality of supply holes 30 may open at a position separated by a distance of 0.2 times or more the length of the hole portion 20 in the longitudinal direction DA from both ends of the hole portion 20. At least one of the plurality of supply holes 30 may be located at the center of the hole portion 20 in the longitudinal direction DA. All of the plurality of supply holes 30 may be located at the center of the hole portion 20 in the longitudinal direction DA.

[0075] (Modification 2) In the above-described embodiments and modifications, an example in which four vertical grooves 22 are provided in the inner wall 20a forming the hole 20 has been shown. However, the number of the vertical grooves 22 is not limited to this. The number of the vertical grooves 22 provided in the inner wall 20a may be three or less, or may be five or more. FIG. 7 is a view showing an example of a cross section perpendicular to the longitudinal direction DA of the coating device 1 of Modification 2. In the example shown in FIG. 7, eight vertical grooves 22 are provided in the inner wall 20a. From the viewpoint of supplying the viscous fluid 60 more uniformly to each screw groove 52, it is preferable that a plurality of vertical grooves 22 are provided in the inner wall 20a.

[0076] (Modification 3) In the above-described embodiment, an example in which the coating device 1 includes the support portion 40 having the columnar member 41 has been shown. However, the form of the coating device 1 is not limited to this. The coating device 1 may not have the columnar member 41 and may not include the support portion 40. FIG. 8 is a perspective view showing a configuration example of the coating device 1 of Modification 3. The coating device 1 shown in FIG. 8 does not have the columnar member 41 and does not include the support portion 40. In the coating device 1 including the support portion 40 as shown in FIG. 1, the support portion 40 may be detachable from the main body portion 10, and the coating device 1 shown in FIG. 8 may be formed by removing the support portion 40 from the main body portion 10.

[0077] By using the coating device 1 shown in FIG. 8, the viscous fluid 60 can be applied to a region having a length exceeding the length of the vertical groove 22 in the longitudinal direction DA of the screw member 50. A coating method for applying the viscous fluid 60 to a region having a length exceeding the length of the vertical groove 22 in the longitudinal direction DA of the screw member 50 by using the coating device 1 shown in FIG. 8 will be described.

[0078] First, a step of inserting the screw member 50 into the insertion hole 21 is performed. As an example, in this step, as shown in FIG. 9, the screw member 50 is inserted so that the tip of the screw member 50 does not enter the second side SA2 beyond the end of the second side SA2 of the vertical groove 22.

[0079] Subsequently, a step of pumping the viscous fluid 60 into the supply hole 30 is performed. As a result, as shown in FIG. 9, the viscous fluid 60 is applied to the region of the screw member 50 where the longitudinal groove 22 is located in the longitudinal direction DA.

[0080] Subsequently, a step of moving the screw member 50 in the longitudinal direction DA with respect to the coating device 1 is performed so that the screw member 50 faces the longitudinal groove 22 in the region where the viscous fluid 60 has not yet been applied. FIG. 10 shows an example of the state in which the screw member 50 with the viscous fluid 60 applied to a part shown in FIG. 9 is moved with respect to the coating device 1. In the example shown in FIG. 10, the screw member 50 is moved from the position shown in FIG. 9 to the second side SA2 in the longitudinal direction DA.

[0081] Subsequently, a step of pumping the viscous fluid 60 into the supply hole 30 is performed while the screw member 50 is moved in the longitudinal direction DA with respect to the coating device 1 so that the screw member 50 faces the longitudinal groove 22 in the region where the viscous fluid 60 has not yet been applied. As a result, the viscous fluid 60 is applied to the region of the screw member 50 where the longitudinal groove 22 is located in the longitudinal direction DA. For this reason, the viscous fluid 60 can be applied to the region of the screw member 50 where the viscous fluid 60 was not applied in the step before this step.

[0082] Subsequently, the step of moving the screw member 50 in the longitudinal direction DA with respect to the coating device 1 and the step of pumping the viscous fluid 60 into the supply hole 30 are repeated until the viscous fluid 60 is applied to the entire desired region of the screw member 50. As a result, the viscous fluid 60 can be applied to a region having a length exceeding the length of the longitudinal groove 22 in the longitudinal direction DA of the screw member 50.

[0083] Aspects of the present invention are not limited to the individual embodiments described above, but include various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the content described above. That is, various additions, changes, and partial deletions are possible without departing from the conceptual ideas and spirit of the present invention derived from the content defined in the claims and their equivalents.

Description of Reference Numerals

[0084] 1 Coating device 10 Main body part 11 Central part 12 First plugging part 13 Second plugging part 20 Hole part 20a Inner wall 21 Insertion hole 22 Vertical groove 23 Discharge hole 23a Gap 30 Supply hole 40 Support part 41 Columnar member 42 Base part 43 Connecting part 50 Screw member 51 Thread 52 Thread groove 60 Viscous fluid

Claims

1. A coating device having a main body portion provided with a hole portion into which a screw member is inserted, and a supply hole that is connected to the hole portion and through which a viscous fluid applied to the screw member is pumped, A longitudinal groove is provided along the longitudinal direction of the hole portion on the inner wall forming the hole portion. Coating device.

2. The longitudinal groove is provided at a position away from the insertion hole. The coating device according to claim 1.

3. The coating device according to claim 1 or 2, wherein the supply hole opens in the longitudinal groove.

4. A discharge hole for discharging the viscous fluid is provided on the side of the hole portion opposite to the side into which the screw member is inserted. The coating device according to claim 1 or 2.

5. Further comprising a support portion for supporting the main body portion, The support portion is provided on the discharge hole side of the hole portion and has a columnar member having an upper surface with an area smaller than that of the discharge hole, The viscous fluid is discharged from a gap between the discharge hole and the upper surface of the columnar member. The coating device according to claim 4.

6. The coating device according to claim 5, wherein the upper surface of the columnar member is located between the longitudinal groove and the discharge hole in the longitudinal direction.

7. When the width of the insertion hole is w1, the distance from the axis of the screw member to the top of the thread is w2, and the depth of the thread groove of the screw member is w3, the following formula (1) holds. The coating device according to claim 1 or 2. 【Equation 1】

8. The coating device according to claim 1 or 2, wherein the supply hole is located at the center of the hole portion in the longitudinal direction.

9. The coating device according to claim 1 or 2, wherein the supply hole opens at positions separated from both ends of the hole portion by a distance of 0.2 times or more the length of the hole portion in the longitudinal direction.

10. The coating device according to claim 1 or 2, wherein the area of the longitudinal groove in a cross-section perpendicular to the longitudinal direction is smaller than the area of the thread groove of the screw member in a cross-section passing through the axis of the screw member.

11. The coating device according to claim 1 or 2, wherein in the direction in which the screw member is inserted into the insertion hole, the distance between the upper end of the longitudinal groove and the insertion hole on the inner wall forming the hole portion is equal to or greater than the pitch length of the thread of the screw member.

12. The coating device according to claim 4, wherein when the width of the discharge hole is w4, the distance from the axis of the screw member to the apex of the thread is w2, and the depth of the thread groove of the screw member is w3, the following formula (2) holds. 【Equation 2】

13. A coating method for applying a viscous fluid to a screw member using a coating device, wherein the coating device has a main body portion provided with an insertion hole into which the screw member is inserted and a supply hole connected to the hole portion through which the viscous fluid to be applied to the screw member is pumped, a longitudinal groove is provided along the longitudinal direction of the hole portion on the inner wall forming the hole portion, the coating method includes a step of inserting the screw member into the insertion hole, and a step of pumping the viscous fluid into the supply hole.

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