JP7358124B2 - Greasing device for board transfer equipment - Google Patents

Description

The present invention relates to a greasing device used in a substrate transport device.

In a conveyance device, a lubricant such as grease or oil is supplied between mechanical parts that are engaged and move relative to each other. In a robot that requires such greasing, an example in which a grease gun is connected to the greasing port and grease is injected is described in Patent Document 1 (Japanese Patent Laid-Open No. 2005-177914).

Japanese Patent Application Publication No. 2005-177914

In such conveying devices, insufficient supply of lubricant causes wear and damage to mechanical parts. Wear and damage to mechanical parts reduce the positional accuracy of the conveying device. On the other hand, excessive supply of this lubricant causes leakage and scattering of the lubricant. Leakage and scattering of lubricant deteriorate the environment around mechanical parts.

A transfer device (substrate transfer device) is also used in the manufacturing process and transportation of substrates such as semiconductors. Such substrates are handled in a clean environment. In this substrate transfer device, it is necessary to suppress deterioration of the surrounding environment due to the lubricant. In this substrate transfer device, it is necessary to suppress excessive supply of lubricant while suppressing wear and damage.

An object of the present invention is to provide a lubrication device that can properly lubricate a substrate transfer device while keeping it clean.

The greasing device according to the present invention includes a first member including a first engaging portion extending in a predetermined direction, and a second engaging portion, the second engaging portion being engaged with the first engaging portion. The second member is movable in the predetermined direction relative to the first member. This greasing device supplies a predetermined amount of grease to the first engaging portion each time a predetermined condition is satisfied.

Preferably, the predetermined direction is an up-down direction.

Preferably, this greasing device includes a tank that has an elongated shape and stores the grease with the vertical direction as the longitudinal direction, a pressurizing body that pressurizes the grease in the tank, and a pressurizing body that opens and closes an extrusion port of the tank. The apparatus includes an opening/closing body and an application body that cuts the grease extruded from the extrusion port and applies the cut grease pieces to the first engagement portion.

Preferably, the pressurizing body is a weight that presses the grease in the tank downward.

Preferably, this greasing device includes a tank that stores the grease, a pressurizing device that switches between supplying and stopping the supply of pressure fluid that pressurizes the grease in the tank, and a grease flow path that communicates with the tank. Be prepared. The first engaging part is a rack, and the second engaging part is a pinion. The rack includes a surface formed with teeth that engage with teeth of the pinion, and a greasing hole penetrating the surface. The grease supply hole is connected to the grease flow path.

Preferably, this greasing device includes a tank that stores the grease, a pressurizing body that pressurizes the grease in the tank, a grease channel that communicates with the tank, and an on-off valve that opens and closes the grease channel. Equipped with. The first engaging part is a rack, and the second engaging part is a pinion. The rack includes a surface formed with teeth that engage with teeth of the pinion, and a greasing hole penetrating the surface. The grease supply hole is connected to the grease flow path.

The greasing device according to the present invention supplies a predetermined amount of grease to a first engaging portion extending in a predetermined direction every time a predetermined condition is satisfied. The lubrication device can properly lubricate the substrate transport device while maintaining a clean environment.

FIG. 1 is a schematic diagram of a substrate transport device that includes a greasing device according to one embodiment of the present invention and a lifting device in which this greasing device is used. FIG. 2 is an explanatory diagram of a greasing device and a lifting device of the substrate transport device of FIG. 1. FIG. 3 is another explanatory diagram of the elevating device of the substrate transport device of FIG. 1. FIG. FIG. 4(A) is an explanatory diagram of a usage state of the greasing device in FIG. 2, FIG. 4(B) is an explanatory diagram of another usage state of this greasing device, and FIG. FIG. 4D is an explanatory diagram of still another usage state of the greasing device, and FIG. 4(D) is an explanatory diagram of still another usage state of this greasing device. FIG. 5 is an explanatory diagram of a greasing device according to another embodiment of the present invention. FIG. 6(A) is an explanatory diagram of a usage state of the greasing device of FIG. 5, and FIG. 6(B) is an explanatory diagram of another usage state of this greasing device.

EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be described in detail based on preferred embodiments, with appropriate reference to the drawings.

FIG. 1 shows a substrate 2, a container 4 that accommodates the substrate 2, and a substrate transport device 6 that transports the substrate 2. The left-right direction in FIG. 1 is the front-back direction of the substrate transport device 6, and the direction perpendicular to the paper surface is the left-right direction of the substrate transport device 6.

The substrate 2 is, for example, a semiconductor substrate, a glass substrate, or the like. This substrate 2 is, for example, a circular thin plate. Examples of the semiconductor substrate include a silicon substrate, a sapphire (single crystal alumina) substrate, and various other substrates. Examples of the glass substrate include a glass substrate for FPD (Flat Panel Display), a glass substrate for MEMS (Micro Electro Mechanical Systems), and the like.

Container 4 accommodates substrate 2 . This container 4 can accommodate a plurality of substrates 2 arranged vertically. The container 4 is, for example, a FOUP (Front Opening Unified Pod), although it is not particularly limited. This container 4 is placed on a table (not shown).

The substrate transfer device 6 includes a manipulator 8, a hand 10, and a control device 12. Here, the manipulator 8 includes a linear motion mechanism that moves the hand 10 in the front-back direction. The manipulator 8 is exemplified as one based on a translational joint robot. Note that the manipulator 8 according to the present invention is not limited to one based on a translational joint robot. This manipulator 8 may be based on a horizontal articulated robot or a vertical articulated robot.

The manipulator 8 includes a lifting device 14 and an arm 16. This arm 16 includes a first arm 16A and a second arm 16B.

The elevating device 14 includes a base 18 as a first member and an elevating shaft 20 as a second member. The base 18 is fixed to, for example, a floor (not shown). The base 18 supports an elevating shaft 20. The elevating shaft 20 is attached to the base 18 via, for example, a linear guide as a moving device. The elevating shaft 20 is movable in the vertical direction with respect to the base 18.

The base end portion of the first arm 16A is connected to the elevating shaft 20. A dashed line L1 in FIG. 1 represents an axis extending in the vertical direction. The first arm 16A is rotatable around the axis L1. A rotation device and a drive motor that rotatably support the first arm 16A are arranged on the elevating shaft 20. In FIG. 1, the first arm 16A extends in the front-rear direction as its longitudinal direction.

A base end portion of a second arm 16B is connected to the first arm 16A. The second arm 16B is movable relative to the first arm 16A in the longitudinal direction of the first arm 16A. A moving device and a drive motor that movably support the second arm 16B are arranged on the first arm 16A.

A base end portion of the hand 10 is connected to the second arm 16B. The hand 10 is movable relative to the second arm 16B in the longitudinal direction of the second arm 16B. A moving device and a drive motor that movably support the hand 10 are arranged on the second arm 16B.

The hand 10 includes a hand main body 10A and a plurality of claws 10B. The hand main body 10A has a plate-like shape with the thickness direction being in the up-down direction. A plurality of claws 10B are attached to the upper surface of the hand body 10A. The hand 10 can support the substrate 2 with a plurality of claws 10B. In FIG. 1 , a substrate 2 is supported by a hand 10 .

Although not shown, the control device 12 includes a storage section, a calculation section, and an input/output section. The storage unit stores information such as basic programs and various fixed data. Examples of the storage unit include ROM, RAM, and the like. The calculation unit reads and executes software such as a basic program stored in the storage unit. The calculation unit executes calculations based on various data input from the input/output unit. A CPU is exemplified as the calculation unit. The input/output section inputs and outputs electrical signals to and from the manipulator 8, sensors (not shown), and the like. An interface board is exemplified as the input/output unit. The control device 12 may be configured with a microcomputer, a PLC (Programmable Logic Controller), an MPU, or the like.

FIG. 2 shows a part of the lifting device 14, as well as a greasing device 22 and an oil guide 24. This substrate transfer device 6 is equipped with this greasing device 22 and an oil guide 24. The lifting device 14 includes a rack 26 as a first engaging portion and a pinion 28 as a second engaging portion. The rack 26 is attached to the main body of the base 18. The pinion 28 is attached to the main body of the lifting shaft 20. In addition, in FIG. 2, a part of the base 18 and the elevating shaft 20 are shown.

The greasing device 22 includes a tank 30, a piston 32 as a weight, an applicator 34, a cylinder 36 as a drive device, and a receiving plate 38. The greasing device 22 is attached to the lifting shaft 20.

The tank 30 includes a storage chamber 40, an extrusion port 42, and a ventilation hole 44. The tank 30 extends with the vertical direction as its longitudinal direction. The storage chamber 40 is formed with the vertical direction as the longitudinal direction. Grease G is stored in the storage chamber 40. The extrusion port 42 opens downward from the storage chamber 40. The ventilation hole 44 opens upward from the storage chamber 40 . The opening area of the extrusion port 42 is smaller than the cross-sectional area of the storage chamber 40. The storage chamber 40 consists of a portion with a constant cross-sectional area in the longitudinal direction and a portion with a cross-sectional area that gradually decreases toward the extrusion port 42 between this constant portion and the extrusion port 42 .

The piston 32 is housed in a storage chamber 40. The piston 32 can slide on the wall surface 40A in a portion of the storage chamber 40 that has a constant cross-sectional area. The piston 32 partitions the grease G below the storage chamber 40 from the space above. The ventilation hole 44 communicates with this upper space.

The applicator 34 has a plate-like shape. In this FIG. 2, the applicator 34 closes the extrusion port 42. The applicator 34 is movable in the front-back direction by a cylinder 36. The receiving plate 38 is located below the extrusion port 42. The receiving plate 38 faces the extrusion port 42 . The applicator 34 is movable in the front-rear direction between the extrusion port 42 and the receiving plate 38.

The rack 26 includes a plurality of teeth 46 arranged in the vertical direction. A plurality of teeth 46 are formed on the surface 26A facing the pinion 28. The pinion 28 is rotatably supported by the main body of the lifting shaft 20. The pinion 28 includes a plurality of teeth 48 arranged in the circumferential direction. Teeth 46 of rack 26 and teeth 48 of pinion 28 are engaged. Although not shown, the elevating device 14 includes a moving device that supports the elevating shaft 20 so as to be movable in the vertical direction relative to the base 18, and a drive motor that rotationally drives the pinion 28.

As shown in FIG. 3, in this lifting device 14, the rack 26 and pinion 28 are formed of helical gears. Note that the rack 26 and pinion 28 according to the present invention are not limited to helical gears, and may be formed of spur gears.

4(A) to 4(D) show how the greasing device 22 of FIG. 2 is used. In FIG. 4(A), the applicator 34 is blocking the extrusion port 42. In FIG. In FIG. 4B, the applicator 34 is spaced apart from the rack 26 by a cylinder 36. In FIG. The extrusion port 42 is open. Grease G is pushed out from the extrusion port 42 by the weight of the piston 32 (see FIG. 2). The extruded grease G is in contact with the receiving plate 38.

In FIG. 4(C), the applicator 34 is located in the middle of being moved by the cylinder 36 from the position in FIG. 4(B) to the position in FIG. 4(D). The applicator 34 cuts the grease G extruded from the extrusion port 42 to a predetermined extrusion length. Here, the applicator 34 cuts the grease G with the distance from the extrusion port 42 to the receiving plate 38 being the extrusion length. By this cutting, a predetermined amount of grease pieces Gp are formed from the grease G. The applicator 34 pushes the grease piece Gp toward the surface 26A of the rack 26. In FIG. 4C, the applicator 34 blocks the extrusion port 42. In FIG.

In FIG. 4(D), the applicator 34 is closest to the rack 26 by the cylinder 36. A grease piece Gp is applied to the surface 26A of the rack 26 by the applicator 34.

A greasing method for the greasing device 22 will be explained with reference to FIGS. 4(A) to 4(D). In this greasing method, grease G is stored in a tank 30, as shown in FIG. This grease G is pressurized by the piston 32.

As shown in FIG. 4(A), the extrusion port 42 is closed with the application body 34 (STEP 1). Grease G is pushed out from this tank 30 (STEP 2). In STEP 2, the cylinder 36 moves the applicator 34 to a position away from the rack 26. Extrusion port 42 opens. Grease G is extruded from the extrusion port 42. As shown in FIG. 4(B), the extruded grease G comes into contact with the receiving plate 38.

Grease G is cut to form grease pieces Gp (STEP 3). In STEP 3, the cylinder 36 moves the applicator 34 from the position shown in FIG. 4(B) toward the rack 26. The applicator 34 cuts the grease G while blocking the extrusion port 42 . As shown in FIG. 4(C), the applicator 34 closes the extrusion port 42, and a predetermined amount of grease pieces Gp are formed.

Grease piece Gp is applied to the rack 26 (STEP 4). In STEP 4, the cylinder 36 moves the applicator 34 from the position shown in FIG. 4(C) toward the rack 26. This applicator 34 applies the grease piece Gp to the teeth 46 of the rack 26.

In this greasing method, STEP 1 to STEP 4 are repeated every time a predetermined condition is satisfied. For example, STEP1 to STEP4 are periodically repeated. Further, the predetermined conditions may be, for example, a predetermined time, a predetermined number of operations, or a predetermined operation distance. This predetermined condition may be determined by detecting the grease condition such as deterioration or film thickness of the applied grease using a sensor, and using this grease condition as a reference. This predetermined condition may be determined based on the temperature, the current value of the drive motor, or the like.

The substrate transfer device 6 shown in FIG. 1 is used in a clean environment such as a clean room. In the greasing device 22, grease G is used as a lubricant. Grease G is a paste-like or solid lubricant that is semi-solid at room temperature and is made by adding a thickener to liquid lubricating oil or other liquid lubricant. This grease G has less scattering and leakage than liquid lubricating oil. Grease G is suitable for lubricating a transfer device used in a clean environment, such as the substrate transfer device 6.

In this greasing device 22, a predetermined amount of grease Gp is supplied as a grease piece Gp each time a predetermined condition is satisfied. This greasing device 22 can supply a predetermined amount of grease G sufficient for lubrication, and can suppress the supply of more grease G than necessary. This greasing device 22 can supply a necessary and sufficient amount of grease G with little scattering or leakage. This lubricating device 22 can properly lubricate the substrate transport device 6 while maintaining a clean environment. From this point of view, the greasing device 22 includes not only the first engaging portion (rack 26) extending in the vertical direction but also the first engaging portion (rack 26) extending in a predetermined direction including the horizontal direction as well as the vertical direction. ) Suitable for lubrication.

This greasing device 22 applies grease pieces Gp to the teeth 46 arranged in the vertical direction of the rack 26. The greasing device 22 lubricates the rack 26 with grease G as a first engaging portion extending in the vertical direction. The applied grease piece Gp flows down along the surface 26A and side surface 26B of the rack 26. This greasing device 22 can further prevent the grease G from scattering over a wide range in the rack 26 serving as the first engaging portion extending in the vertical direction.

This greasing device 22 supplies a predetermined amount of grease pieces Gp to the rack 26 . By supplying an appropriate amount of grease pieces Gp, the greasing device 22 can maintain a lubricated state for a predetermined period of time. This greasing device 22 supplies grease pieces Gp to the rack 26 every time a predetermined condition is satisfied. Thereby, the lubricating device 22 can maintain a lubricated state for a long period of time.

The tank 30 of this greasing device 22 has a vertical direction as its longitudinal direction. The tank 30 extends along a rack 26 serving as a first engaging portion that extends in the vertical direction. This tank 30 can save space while increasing the capacity of stored grease G.

In this greasing device 22, the grease G in the tank 30 is pressurized. By applying pressure, semi-solid paste-like or solid grease G is extruded from the extrusion port 42 at a substantially constant speed. The extruded grease G is cut to the thickness of the application body 34 to form grease pieces Gp. As a result, a predetermined amount of grease pieces Gp are formed. In this greasing device 22, the applicator 34 closes the extrusion port 42 of the tank 30, thereby suppressing leakage of the pressurized grease G. This greasing device 22 can maintain a proper lubrication state and suppress scattering of the grease G.

In this lifting device 14, the rack 26 and pinion 28 are formed of helical gears. Helical gears have a higher meshing ratio and less vibration than spur gears. On the other hand, helical gears have inferior wear resistance compared to spur gears. Helical gears are more prone to problems due to lack of lubrication than spur gears. This greasing device 22 can maintain a proper lubrication state and suppress scattering of grease G. This lubricating device 22 is suitable for lubricating the lifting device 14 including this rack 26 and pinion 28.

In this greasing device 22, a piston 32 pressurizes the grease G as a weight. This greasing device 22 does not require power for pressurization. This greasing device 22 can pressurize the grease G with a simple configuration of just forming a vent hole 44 in the tank 30. Note that in this greasing device 22, the piston 32 is used as a weight, but a weight may be used separately from the piston 32. Further, the pressurizing body of the present invention is not limited to one that pressurizes with a weight. For example, this pressurizing body may be one that pressurizes with pressurized fluid such as compressed air.

In this greasing device 22, the applicator 34 also has the function of cutting the grease G. By using this application body 34, there is no need to separately provide a cutting device to which the grease G adheres. This applicator 34 also has the function of opening and closing the extrusion port 42 of the tank 30. By using this application body 34, there is no need to provide a separate opening/closing body to which the grease G adheres. This applicator 34 can reduce the number of parts to which the grease G adheres. This greasing device 22 can suppress dirt around the lifting device 14. By including this applicator 34, the structure of the greasing device 22 can be simplified. In the present invention, a cutting device for cutting the grease G and an opening/closing body for opening and closing the extrusion port 42 may be provided separately from the application body 34.

This greasing device 22 includes an oil guide 24. The oil guide 24 collects the grease G flowing down along the surface 26A and side surface 26B of the rack 26. The collected grease G is sent to a collection container (not shown). By providing this oil guide 24, it is possible to suppress the grease G from staining the area around the lifting device 14.

Here, the rack 26 is attached to the main body of the base 18 and the pinion 28 is attached to the main body of the elevating shaft 20, but the present invention is not limited to this. The rack 26 may be attached to the main body of the lifting shaft 20, and the pinion 28 may be attached to the main body of the base 18. In this case, the greasing device 22 may be attached to the base 18.

Although this lubricating device 22 was used to lubricate the rack 26 and the pinion 28, the present invention is not limited thereto. The lubricating device 22 may be used to lubricate the ball screw as the first engaging portion and the nut as the second engaging portion.

In this greasing device 22, the grease G is received by the receiving plate 38, and the applicator 34 cuts the grease G, but the present invention is not limited thereto. The grease G may be cut to an extruded length corresponding to the thickness of the application body 34 without using the receiving plate 38.

FIG. 5 shows a part of a substrate transport device 58 including another greasing device 56 according to the present invention. This substrate transport device 58 includes a greasing device 56 in place of the greasing device 22 of the substrate transport device 6 . The substrate transfer device 58 includes a rack 60 in place of the rack 26 of the substrate transfer device 6. The substrate transfer device 58 has the same structure as the substrate transfer device 6 in other respects. Here, configurations that are different from the substrate transport device 6 will be mainly explained. Descriptions of configurations similar to the substrate transport device 6 will be omitted. In addition, the same components as the substrate transport device 6 will be described using the same reference numerals.

The greasing device 56 includes a tank 62, a piston 64, a grease flow path 66, and a pressurizing device 68. The greasing device 56 is attached to the base 18 together with the rack 60. Although three greasing devices 56 are attached to the substrate transport device 58, the present invention is not limited thereto. A plurality of greasing devices 56 may be attached at predetermined intervals in the vertical direction, or a single greasing device 56 may be attached. Note that the greasing device 56 is attached to the elevating shaft 20 when the rack 60 is attached to the elevating shaft 20.

The tank 62 includes a storage chamber 70 and an extrusion port 72. Grease G is stored in the storage chamber 70. Piston 64 is housed in storage chamber 70 . The piston 64 is slidable on the wall surface 70A of the storage chamber 70. The piston 64 partitions the storage chamber 70 into a storage space 74 and a pressurized space 76 .

Grease flow path 66 is connected to extrusion port 72 of tank 62 . Grease channel 66 communicates with storage chamber 70 . The grease channel 66 is made of, for example, a hose. The grease channel 66 may be made of metal piping.

The pressurizing device 68 includes a pressurized fluid piping 78 and a switching valve 80 . This pressurized fluid is not particularly limited, but will be explained here using pressurized air as an example. This piping 78 connects the tank 62 to a pressurized tank (not shown) in which pressurized air is stored. The switching valve 80 opens and closes the flow path of this piping 78. Note that here, the switching valve 80 can be switched between a state in which the flow path of the piping 78 is opened between the pressurized tank and the tank 62, and a state in which this flow path is closed. Further, in this switching valve 80, the air in the pressurized space 76 of the tank 62 is released to the atmosphere while the flow path is closed.

The rack 60 includes a plurality of teeth 82 arranged in the vertical direction. A plurality of teeth 82 are formed on the surface 60A facing the pinion 28. The rack 60 includes a greasing hole 84 penetrating through a surface 60A on which teeth 82 are formed. This greasing hole 84 penetrates from the back surface of the rack 60 to the front surface 60A. A grease channel 66 is connected to this greasing hole 84 . Teeth 82 of rack 60 and teeth 48 of pinion 28 are engaged. Although not shown, the substrate transfer device 58 includes a moving device that supports the elevating shaft 20 so as to be movable in the vertical direction relative to the base 18, and a drive motor that rotationally drives the pinion 28.

6(A) and 6(B) show how this greasing device 56 is used. In FIG. 6A, the pressure in the pressurized space 76 is set to atmospheric pressure by the switching valve 80. As a result, the grease G is not pressurized. In FIG. 6(B), the inside of the pressurized space 76 is pressurized with pressurized air by the switching valve 80. Grease G is pressurized via the piston 64. Grease G is pushed out from the greasing hole 84 onto the surface 60A. The extruded grease piece Gp is attached to the surface 60A.

A greasing method for the greasing device 56 will be explained with reference to FIGS. 6(A) and 6(B). In this greasing method, as shown in FIG. 6(A), grease G is stored in the tank 62 (STEP 1').

Grease piece Gp is applied to the surface 60A (STEP 2'). In this STEP 2', the switching valve 80 is switched from the state shown in FIG. 6(A). The piston 64 pressurizes the grease G in the tank 62. Grease G is pushed out from the greasing hole 84 onto the surface 60A. The state of STEP 2' is maintained for a predetermined period of time. A predetermined amount of grease G is pushed out. After a predetermined period of time has elapsed, the switching valve 80 is switched to the state shown in FIG. 6(A). Extrusion of the grease G from the greasing hole 84 is stopped. Thereby, the greasing device 56 returns to the state of STEP 1' shown in FIG. 6(A).

In this greasing method, STEP 1' and STEP 2' are repeated every time a predetermined condition is satisfied. For example, STEP1' and STEP2' are repeated at predetermined time intervals. STEP 1' and STEP 2' may be repeated every predetermined number of times the lifting device 14 is used.

In this greasing device 56, the storage chamber 70, the grease flow path 66, and the greasing hole 84 are airtightly connected. By managing the predetermined time during which the state of STEP 2' is maintained and the pressure of the pressurized air, the amount of grease G to be pushed out can be controlled. This greasing device 56 can supply a predetermined amount of grease pieces Gp. By applying this predetermined amount of grease pieces Gp to the rack 60, a proper lubrication state is maintained and scattering of the grease G is suppressed.

In this greasing device 56, grease G is applied from the greasing hole 84 of the rack 60. In this greasing device 56, scattering of the grease G is further suppressed.

In this greasing device 56, the switching valve 80 switches between pushing out the grease G and stopping pushing out, but the present invention is not limited thereto. For example, an on-off valve for the grease flow path 66 may be provided. The on-off valve of the grease flow path 66 may be opened and closed while pressurizing the grease G in the storage chamber 70. In this case, the storage chamber 70 may be pressurized at all times, or may be pressurized with a weight, for example.

From this description, many modifications and other embodiments of the invention will be apparent to those skilled in the art. Accordingly, this description should be construed as illustrative only. This description is provided to teach those skilled in the art the best mode of carrying out the invention. Substantial changes may be made in the structural and functional details thereof without departing from the invention. Moreover, various inventions can be formed by appropriately combining the plurality of components disclosed in this embodiment.

2... Substrate 4... Container 6, 58... Substrate transport device 14... Elevating device 18... Base 20... Elevating shaft 22, 56... Greasing device 26, 60... ...Racks 26A, 60A...Surface 28...Pinions 30, 62...Tanks 32, 64...Piston 34...Applying bodies 40, 70...Storage chambers 42, 72...Press Outlets 46, 48, 82... Teeth 66... Grease flow path 68... Pressure device 80... Switching valve 84... Greasing hole

Claims (7)

a first member including a first engaging part extending in a predetermined direction; and a second engaging part, the second engaging part is engaged with the first engaging part to be connected relative to the first member. and a second member movable in the predetermined direction.
a tank that stores grease and has an outlet for the grease;
a pressurizing body that pressurizes the grease in the tank;
a cutting device that cuts the grease extruded from the extrusion port into a predetermined length;
an applicator that applies grease pieces cut by the cutting device to the first engaging portion;
Equipped with
A greasing device that supplies a predetermined amount of grease to the first engaging portion each time a predetermined condition is satisfied. The greasing device according to claim 1, wherein the extrusion port of the tank opens downward . The greasing device according to claim 1 or 2, wherein the applicator functions as the cutting device. The tank has an elongated shape , and the vertical direction is the longitudinal direction ,
The greasing device according to claim 1, further comprising an opening/closing body that opens and closes the extrusion port of the tank. The greasing device according to any one of claims 2 to 4 , wherein the pressurizing body is a weight that presses the grease in the tank downward. A pressurizing device that switches between supplying and stopping the supply of pressurized fluid that pressurizes the grease in the tank, and a grease flow path that communicates with the tank,
The first engaging part is a rack, the second engaging part is a pinion,
The rack includes a surface formed with teeth that engage with teeth of the pinion, and a greasing hole penetrating the surface,
The greasing device according to claim 1, wherein the greasing hole is connected to the grease flow path. It includes a grease flow path that communicates with the tank, and an on-off valve that opens and closes the grease flow path,
The first engaging part is a rack, the second engaging part is a pinion,
The rack includes a surface formed with teeth that engage with teeth of the pinion, and a greasing hole penetrating the surface,
The greasing device according to claim 1, wherein the greasing hole is connected to the grease flow path.

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