A greasing device that feeds grease to a portion requiring greasing that is housed inside a housing, and includes a jig and a greasing pipe fixed to the jig. The housing includes a though-hole that extends through the housing. The jig includes an insertion part that is inserted into the through-hole of the housing. A side surface of the insertion part bear a marking-off line at a position a predetermined distance away from a leading end side of the insertion part. A position of the marking-off line is a height position that the greasing pipe does not come into contact with inner components of the housing when the jig is inserted into the through-hole up to the position of the marking-off line.

There is provided a guide jig including a guide jig body and an engagement portion provided on the guide jig body and configured to be engaged with an engagement partner with the guide jig body positioned with respect to the engagement partner. The guide jig body includes a guide through hole provided as a through hole extending toward a relevant portion with the engagement portion engaged with the engagement partner and configured to guide the direction of insertion of an insertion portion to be inserted into the through hole and moved toward the relevant portion. The engagement portion includes at least two projecting portions. The at least two projecting portions are disposed in line in the direction of insertion. A gap between adjacent projecting portions, among the at least two projecting portions, is set to have a length corresponding to the thickness of the engagement partner.

There is provided a guide jig including a guide jig body and an engagement portion provided on the guide jig body and configured to be engaged with an engagement partner with the guide jig body positioned with respect to the engagement partner. The guide jig body includes a guide through hole provided as a through hole extending toward a relevant portion with the engagement portion engaged with the engagement partner and configured to guide the direction of insertion of an insertion portion to be inserted into the through hole and moved toward the relevant portion. The engagement portion includes at least two projecting portions. The at least two projecting portions are disposed in line in the direction of insertion. A gap between adjacent projecting portions, among the at least two projecting portions, is set to have a length corresponding to the thickness of the engagement partner.

A holding member configured to hold an injection portion and an imaging unit of an insertion portion in a state in which the injection portion and the imaging unit are arranged side by side includes an injection-portion insertion portion configured such that the injection portion is press-fitted into the injection-portion insertion portion and an imaging-unit insertion portion configured such that the imaging unit is press-fitted into the imaging-unit insertion portion. The insertion portion is configured to be inserted toward a corresponding portion in a narrow space while being gripped by an operator. The injection portion has a cylindrical shape and is provided with a fluid substance injection port at a tip end portion. The imaging unit has a cylindrical shape and is configured to capture an image including the tip end portion of the injection portion and its surrounding environment.

A holding member configured to hold an injection portion and an imaging unit of an insertion portion in a state in which the injection portion and the imaging unit are arranged side by side includes an injection-portion insertion portion configured such that the injection portion is press-fitted into the injection-portion insertion portion and an imaging-unit insertion portion configured such that the imaging unit is press-fitted into the imaging-unit insertion portion. The insertion portion is configured to be inserted toward a corresponding portion in a narrow space while being gripped by an operator. The injection portion has a cylindrical shape and is provided with a fluid substance injection port at a tip end portion. The imaging unit has a cylindrical shape and is configured to capture an image including the tip end portion of the injection portion and its surrounding environment.

The present invention relates to a grease application device in which a tip-side inclined surface of a nozzle 28 is made to closely face worm wheel teeth 11 of a shaft-mounted worm wheel 9 while rotating the shaft-mounted worm wheel 9 by means of a drive unit 12. At this state, the grease application device is configured to apply liquid grease from a tip-side opening of the nozzle 28 to the worm wheel teeth 11 of the shaft-mounted worm wheel 9 and to apply the grease while pushing the grease into concave portions of the worm wheel teeth 11. Also, the grease application device is configured to end the application of the grease at a point of time at which the shaft-mounted worm wheel has rotated one revolution with respect to the nozzle 28 after starting the application of the grease to the shaft-mounted worm wheel 9.

An insertion amount grasping device includes: a first jig fixed to a fixation target in a state where the first jig is positioned against the fixation target, the first jig having a guide through-hole extending toward an application portion in a state where the first jig is fixed to the fixation target; an insertion portion inserted into the guide through-hole such that the insertion portion is introduced toward the application portion in a state where an operator grips the insertion portion; and a protruding portion as a protruding portion provided in the insertion portion, the protruding portion inserted into the guide through-hole and cause friction between the protruding portion and the guide through-hole when a predetermined positional relationship is established between a distal end part of the insertion portion and the application portion along with an introduction operation to introduce the insertion portion toward the application portion.

An insertion amount grasping device includes: a first jig fixed to a fixation target in a state where the first jig is positioned against the fixation target, the first jig having a guide through-hole extending toward an application portion in a state where the first jig is fixed to the fixation target; an insertion portion inserted into the guide through-hole such that the insertion portion is introduced toward the application portion in a state where an operator grips the insertion portion; and a protruding portion as a protruding portion provided in the insertion portion, the protruding portion inserted into the guide through-hole and cause friction between the protruding portion and the guide through-hole when a predetermined positional relationship is established between a distal end part of the insertion portion and the application portion along with an introduction operation to introduce the insertion portion toward the application portion.

A tip end face of a body part 13 is provided at a part in front of a discharge port with respect to a rotational direction of a worm wheel 2 with a protruding part 16, and a tip end face of the protruding part 16 is provided with a grease-pushing surface part 17 configured to push grease into concave portions of a worm wheel teeth 3 while raking and leveling the grease so that the grease is substantially uniform in a width direction and in a circumferential direction of the worm wheel teeth 3. Also, the tip end face of the body part 13 is provided at a rear part of the discharge port with respect to the rotational direction of the worm wheel 2 with a protruding wall part 18 for preventing the grease 1 from moving rearwards with respect to the rotational direction of the worm wheel 2.

A greasing device that feeds grease to a portion requiring greasing that is housed inside a housing, and includes a jig and a greasing pipe fixed to the jig. The housing includes a though-hole that extends through the housing. The jig includes an insertion part that is inserted into the through-hole of the housing. A side surface of the insertion part bear a marking-off line at a position a predetermined distance away from a leading end side of the insertion part. A positon of the marking-off line is a height position that the greasing pipe does not come into contact with inner components of the housing when the jig is inserted into the through-hole up to the positon of the marking-off line.