JP2023047360A - O-ring attachment device, o-ring attachment structure, and o-ring attachment method - Google Patents

Abstract

To provide an O-ring attachment device which has a simple structure and yet enables an O-ring to be attached by easy work or simple action with less damage caused when the O-ring is attached to a housing groove, and to provide an O-ring attachment structure and an O-ring attachment method.SOLUTION: An O-ring attachment device includes: a push-in side rod-like part 17 which has a rod-like shape and pushes in an O-ring 12; and a receiving side rod-like part 21 which is used to receive the O-ring pushed in by the push-in side rod-like part in a rod hole 14, has a rod-like shape, and has a receiving side expansion part 23 which gradually expands toward a center of a receiving side end surface 22, an end surface of the receiving side rod-like part, at one end. The receiving side rod-like part is inserted from the other opening of the rod hole and supported at a position such that the receiving side end surface continues into an inner wall facing in a direction of one opening of the housing groove to form an O-ring introduction passage.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an O-ring mounting device, an O-ring mounting structure, and an O-ring mounting method, and more particularly, to an O-ring mounting device and an O-ring having a receiving side rod-shaped portion inserted into a housing to form an O-ring introduction path. It relates to a mounting structure and an O-ring mounting method.

Conventionally, an O-ring is pushed into one opening of a rod hole drilled in a tubular housing, and the O-ring is inserted into a housing groove formed around the inner peripheral surface of the rod hole. There is an O-ring insertion device for mounting (Patent Document 1). The term "housing" as used herein refers to a housing conforming to, for example, JIS B2401-2 "O-ring-Part 2: Shape and dimensions of housing", and an O-ring is accommodated in an internal housing groove.

In such a conventional O-ring inserting device, an operator does not grip the O-ring directly with fingers and inserts it into the rod hole when mounting the O-ring in the housing groove, but rather operates a pair of upper and lower rod-like portions. Therefore, only the tip of each bar contacts the O-ring. Therefore, the operator does not directly touch and insert the O-ring.

JP 2014-145379 A

The conventional O-ring inserting device attempts to guide the O-ring into the housing groove by sandwiching the O-ring between two rod-shaped portions inserted from above and below the housing while rotating the housing.

By the way, since such a housing groove is formed around the inner peripheral surface of the rod hole, it is not easy to process the groove, and the edges of the groove are often sharp even after the groove is processed. Therefore, if the housing is rotated while sandwiching the O-ring as in the conventional O-ring inserting device, the edge of the housing groove will damage the O-ring.

Also, the O-ring is elastically deformed so as to fit inside the rod hole, and from that state, the shape of the O-ring is restored so as to fit into the housing groove. The O-ring elastically deformed as described above deforms vertically while it is being passed through the rod hole. must. In order to complete such work via the rod-shaped portion inserted from the upper opening of the rod hole, a considerable skill is required for the operator, and it is generally difficult. In addition, if the number of times the O-ring is poked by the rod-shaped portion increases, the O-ring may be damaged.

Furthermore, regarding the conventional O-ring insertion device, Patent Document 1 discloses a method of applying vibration to the rod-shaped portion by an ultrasonic vibration generator, but the space required for the ultrasonic vibration generator is required. In addition, it may give adverse environment such as vibration and noise to the entire working environment.

Therefore, under such problems, the present invention provides an O-ring mounting device, an O-ring mounting structure, and an O-ring that enable mounting of an O-ring with a simple structure, easy work or simple operation, and less damage. It aims at providing the mounting method.

(1) In the present invention, an O-ring is pushed into one opening of a rod hole drilled in a tubular housing, and inserted into a housing groove formed around the inner peripheral surface of the rod hole. An O-ring mounting device for mounting a ring, comprising a rod-shaped push-in side rod-shaped portion for pushing in the O-ring, a housing holding portion capable of holding the housing, and the O-ring pushed in by the push-in side rod-shaped portion. a receiving-side rod-shaped portion having a rod-shaped receiving-side bulging portion that bulges toward the center of the receiving-side end surface, which is the end surface of the receiving-side rod-shaped portion, for receiving in the rod hole; The side rod-shaped portion is inserted from the other opening of the rod hole in a state in which the housing is held by the housing holding portion, and the receiving side end face is an inner wall facing the direction of the one opening of the housing groove. To provide an O-ring mounting device characterized in that it is configured to be supported at a position where an O-ring introduction path is formed continuously with the O-ring.

That is, the O-ring mounting device of the present invention has a receiving-side rod-shaped portion that is inserted from the other opening of the rod hole, and the receiving-side end surface of the receiving-side rod-shaped portion and this receiving side end face forms an O-ring introduction path continuously with the housing groove, so that the O-ring pushed by the pushing-side rod-shaped portion from one opening of the same rod hole It is received by the side bulge and then guided into the housing groove. The housing provided with this housing groove refers to, for example, a housing standardized by JIS B2401-2 "O-ring-Part 2: Shape and dimensions of housing".

The O-ring is elastically deformed when it is pushed into the rod hole, and enters the rod hole in a slightly elongated state in the hole direction. By abutting the leading end of the O-ring on the receiving-side bulging portion, the leading end of the O-ring contacts any one of the receiving-side bulging portions while avoiding the apex of the receiving-side bulging portion. Orientation is slidable on the surface of the receiving end face.

By the way, the receiving side end face is continuous with the inner wall facing the one opening of the housing groove. The receiving-side bar-shaped portion is inserted through the other opening, so that the receiving-side end face faces the one opening. For these reasons, the O-ring slides on the surface of the receiving-side end face so that the O-ring moves on the O-ring introduction path formed continuously by the receiving-side end face and the inner wall, while moving in the hole. It is possible to turn from the direction to the radial direction of the hole and reach the housing groove. Also, in the process, the shape of the O-ring returns to a circular shape from the vertically long state by following the housing groove.

As described above, in the O-ring mounting device of the present invention, the O-ring can move along the O-ring introduction path and reach the housing groove. A ring can be attached to the housing. In addition, since the friction applied to the O-ring is small, there is little risk of damaging it. Furthermore, even when the O-ring is pushed into the rod hole by the push-side rod-shaped portion that reciprocates, for example, by an automatic machine, the O-ring can be attached to the housing by the simple operation as described above.

(2) Further, the receiving-side bulging portion may have a receiving-side convex bulging portion that forms a convex, partially spherical surface.

That is, since the receiving-side convex portion is formed on the receiving-side end surface, the front end of the O-ring in the direction in which the O-ring advances reliably avoids the receiving-side bulging portion and runs on the surface in any direction. can slide. In particular, since the receiving-side convex bulging portion is formed to have a partially spherical surface, the tip can slide without being caught on the receiving-side bulging portion.

In addition, since the partial spherical surface is formed, the tip can slide in the most slippery direction according to the posture of the O-ring when it comes into contact with the receiving-side convex bulge. It can be slid without being caught by the receiving-side bulging portion.

(3) In addition, an extension tool having a through hole is further provided, and the through hole communicates with the one opening of the rod hole when the housing is held by the housing holding part. It may be supportable to do so.

That is, by supporting the extender so that the through hole communicates with one opening of the rod hole, the O-ring passes through the through hole of the extender and then reaches the one opening of the rod hole. can be done. Therefore, the O-ring is pushed by the push-in side rod-shaped portion and stabilizes its posture while passing through the through hole, and can reliably take a vertically long posture at the stage of entering the rod hole. . As a result, the leading end of the O-ring can contact substantially the center of the bulging portion on the receiving side, and can slide on the end face on the receiving side without failure.

(4) In addition, the through hole has a pair of guide grooves arranged facing each other across the center line and recessed in a direction away from the center line, and each of the guide grooves The depth on one side in the linear direction may be smaller than the depth on the other side in the centerline direction, and the extension tool may be supported such that the one side is adjacent to the housing.

That is, when the pair of guide grooves provided in the through hole are provided deeper toward the entrance, the O-ring is pushed by the bottoms of the guide grooves as it approaches the housing adjacent to the extender, and is inserted into the rod hole in a more vertical state. pushed in. These guide grooves allow the O-ring to enter the rod hole in a more stable posture.

(5) Further, the receiving-side bulging portion may have a receiving-side annular concave bulging portion forming an annular concave and partially spherical surface around the receiving-side convex bulging portion. good.

That is, since the receiving side annular concave bulging portion is formed with a concave partial spherical surface, the receiving side bulging portion bulges toward the outside in the radial direction of the receiving side annular concave bulging portion. is small, and the direction of the slope is formed so as to approach the direction orthogonal to the bulging direction of the receiving side end face. Therefore, as the O-ring slides on the receiving-side end face, it is guided by the inclined surface of the receiving-side annular concave bulging portion, and can seamlessly change its posture from the hole direction to the radial direction of the hole. As a result, the O-ring can smoothly move along the O-ring introduction path and reach the housing groove.

(6) Further, the receiving-side rod-shaped portion may be formed of polytetrafluoroethylene at least at the one end portion including the receiving-side end face.

That is, since the one end portion including the receiving side end face is made of polytetrafluoroethylene (PTFE), which is known to have a lower coefficient of friction than other materials, the O-ring is placed on the receiving side. It can be easily slid on the surface of the bulge. Further, the O-ring is less likely to be damaged by friction with the receiving-side bulging portion when it slides on the surface of the receiving-side bulging portion and moves on the O-ring introduction path. Furthermore, even when a lubricant such as grease is used to move the O-ring more smoothly, the durability of the receiving-side rod-like portion is high because of the high chemical resistance of polytetrafluoroethylene.

(7) Further, the push-in side rod-shaped portion and push-in side rod-shaped portion driving means that hold the push-in side rod-shaped portion and are capable of reciprocating in the hole direction of the rod hole may be further provided.

That is, the O-ring mounting device of the present invention is less likely to damage the O-ring as described above, has a simple structure, and can mount the O-ring to the housing by a simple movement. Therefore, by providing a pushing-side rod-shaped portion driving means capable of reciprocating the pushing-side rod-shaped portion, automation is possible with a relatively simple mechanism. Therefore, by providing the O-ring mounting device of the present invention with the push-in side rod-shaped portion driving means, it is possible to realize labor saving in the process compared to the case where the operator manually operates the push-in side rod-shaped portion. Further, by repeating the optimum operation through this automation, the possibility of damaging the O-ring is smaller than when the operator manually operates the push-in side rod-like portion.

(8) Further, the tip of the push-in side bar-shaped part may have a push-in side protruding part from which the vicinity of the center of the push-in side end face that is the end face protrudes.

That is, when the push-side rod-shaped portion pushes the O-ring to enter the inside of the rod hole, the rear end of the O-ring in the direction opposite to the advancing direction is removed from the push-side projecting portion so that it stays near the center. avoid. As a result, the force acting between the push-in rod-shaped portion and the receiving-side rod-shaped portion of the O-ring is reduced in the vertical direction, and as a result, the O-ring is bent in a "<" shape when viewed from the side. does not occur. As a result, the O-ring can gradually change its posture smoothly from the direction of the hole of the rod hole to the radial direction of the hole without being bent into a "<" shape, and the tip of the advancing direction reaches the housing groove. be able to.

(9) In the present invention, a rod-shaped push-in side rod-shaped portion is used to push the O-ring into one opening of a rod hole drilled in a housing formed in a tubular shape, so that it goes around the inner peripheral surface of the rod hole. An O-ring mounting structure for mounting the O-ring in a housing groove formed by The O-ring is supported at a position where the end face forms an O-ring introduction passage continuously with the inner wall facing the one opening of the housing groove, and the receiving-side end face is pushed by the pushing-side rod-like portion. inside the rod hole, and has a receiving-side bulging portion that bulges closer to the center of the receiving-side end face, and the O-ring is pushed in from the one opening When the leading end of the lever contacts the receiving-side bulging portion, the leading end slides around the receiving-side bulging portion while avoiding the receiving-side bulging portion, and slides onto the O-ring introduction passage. to reach the housing groove.

That is, in the O-ring mounting structure of the present invention, the O-ring can move along the O-ring introduction path and reach the housing groove. can do. Moreover, since the friction applied to the O-ring is small, the risk of damaging it is also small.

Further, when the O-ring mounting structure of the present invention is applied to an automatic machine, the O-ring can be pushed into the rod hole by the push-in side rod-shaped portion that reciprocates by the driving means. Action can attach the O-ring to the housing. Further, it is possible to realize labor saving in the process as compared with the case where the operator manually operates the push-in side rod-like portion. Further, by repeating the optimum operation through such automation, the risk of damaging the O-ring is smaller than when the operator manually operates the push-in side bar.

(10) According to the present invention, an O-ring is pushed into one opening of a rod hole bored in a tubular housing, and the O-ring is pushed into a housing groove formed around the inner peripheral surface of the rod hole. An O-ring mounting method for mounting the O-ring, the housing, a housing holding portion, a rod-shaped push-side rod-shaped portion configured to push the O-ring into the one opening, and a rod-shaped a receiving-side rod-shaped portion having a receiving-side bulging portion that bulges toward the center of the receiving-side end face, which is the end face of the rod-shaped portion, at one end thereof, and preparation for holding the housing by the housing holding portion; a step of inserting the receiving-side rod-shaped portion from the other opening of the rod hole at the one end side, and connecting the receiving-side end face to the inner wall facing the one opening of the housing groove; a receiving-side rod-shaped portion supporting step of supporting at a position where an O-ring introduction path is formed; and a push-in side rod-shaped portion entering step of entering the tip into the rod hole.

That is, according to the O-ring mounting method of the present invention, the O-ring can move along the O-ring introduction path and reach the housing groove in the step of entering the push-in side rod-like portion. The O-ring can be attached to the housing. Moreover, since the friction applied to the O-ring is small, the risk of damaging it is also small.

In addition, since the O-ring mounting method of the present invention includes a preparation step of preparing an O-ring, a housing, a housing holding portion, a pushing-side rod-shaped portion, and a receiving-side rod-shaped portion, and holding the housing by the housing holding portion, In this preparatory step, the housing to be mounted and the O-ring to be mounted can be selected and prepared. In addition, while selecting and preparing a housing holding portion, a push-in side rod-shaped portion, and a receiving side rod-shaped portion having dimensions, specifications, materials, etc., that match the O-ring and the housing to be prepared, these housings and the housing holding portion are prepared. and can be assembled.

Furthermore, since the O-ring mounting method of the present invention includes the receiving-side rod-shaped portion supporting step of supporting the receiving-side rod-shaped portion, in this receiving-side rod-shaped portion supporting step, the position of the housing groove of the prepared housing is determined. , the receiving-side rod-shaped portion can be supported at a location where the O-ring introduction path can be formed by the receiving-side end surface and the inner wall. At this time, when the O-rings are respectively mounted in two or more housing grooves in one housing, the depth of insertion of the receiving side rod-shaped portion is changed according to the positions of the respective housing grooves. , the receiving-side bar-shaped portion can be supported at each corresponding location. Accordingly, each of the housing grooves can be dealt with by preparing only one receiving-side rod-shaped portion for one housing. Further, when the O-ring mounting method of the present invention is applied to an automatic machine, for example, by providing a driving device for moving the receiving-side rod-shaped portion with respect to the housing, each of the housing grooves can be accommodated. It is possible to adjust the position of the receiving-side rod-shaped portion by pressing.

Moreover, since the O-ring mounting method of the present invention includes the push-in side rod-shaped portion entering step of entering the front end of the push-in side rod-shaped portion into the rod hole, the position of the housing groove of the prepared housing and the receiving The depth to which the push-in side rod-shaped portion enters can be changed and determined according to the position of the receiving-side rod-shaped portion supported by the side rod-shaped portion supporting step. Further, when the O-ring mounting method of the present invention is applied to an automatic machine, for example, by providing and adjusting a driving device for reciprocating the push-in side rod-shaped portion with respect to the housing, the O-ring mounting method can be adapted to the housing. By doing so, it becomes possible to change the range in which the push-in side rod-shaped portion operates.

(11) Further, before the pushing-side rod-shaped portion entering step, an extension tool supporting step of supporting an extension tool having a through hole so that the through hole communicates with the one opening of the rod hole. and wherein the preparing step may further include preparing the extension tool.

That is, by supporting the extension tool such that the through hole communicates with one opening of the rod hole, the O-ring can reach the one opening after passing through the through hole of the extension tool. Therefore, the O-ring is pushed by the push-in side rod-shaped portion and stabilizes its posture while passing through the through hole, and can reliably take a vertically long posture at the stage of entering the rod hole. . As a result, the leading end of the O-ring can contact substantially the center of the bulging portion on the receiving side, and can slide on the end face on the receiving side without failure.

In addition, since the O-ring mounting method of the present invention further includes a preparatory step of preparing the extension tool, in this preparatory process, the extension tool having the dimensions, specifications, materials, etc., that matches the housing to be mounted is selected and prepared. be able to.

As described above, the present invention provides an O-ring mounting device, an O-ring mounting structure, and an O-ring mounting method that enable mounting of an O-ring with a simple structure but with an easy work or a simple operation and with less damage. can be provided.

Also, the O-ring mounting device, O-ring mounting structure, or O-ring mounting method of the present invention can be easily applied to an automatic machine because the O-ring can be mounted on the housing by a simple operation. When applied to an automatic machine, it is possible to realize labor saving in the process compared to the case where the operator manually operates the push-in side rod-shaped portion. Further, by accurately repeating the optimum operation through such automation, the operator is less likely to damage the O-ring than if the operator were to manually operate the push-in bar.

1 is a partial cross-sectional view of an O-ring mounting device according to a first embodiment of the present invention, viewed obliquely; FIG. 1 is a perspective view of a housing according to a first embodiment of the invention; FIG. FIG. 2 is an exploded perspective view of the O-ring mounting device of FIG. 1; FIG. 4 is a partial side view of the tip of the receiving-side rod-shaped portion according to the first embodiment of the present invention; 4(a) to 4(d) are explanatory diagrams showing a state in which the O-ring according to the first embodiment of the present invention is sandwiched between a pushing-side rod-shaped portion and a receiving-side rod-shaped portion inside the rod hole. 6(a)-(d) are explanatory diagrams showing a state in which the O-ring of FIG. 5 is pressed by a pushed-down rod-like portion. FIG. FIG. 7 is an explanatory view showing a state in which the O-ring of FIG. 6 is held down by a push-side rod-shaped portion that has been further pushed down; FIG. 3 is a longitudinal sectional view of the housing of FIG. 2; 9A is an explanatory diagram of a state in which the receiving-side bar-shaped portion is inserted and fixed in the housing shown in the vertical cross-sectional view of FIG. 8; FIG. (b) It is explanatory drawing which looked at the state of (a) from the diagonal. 9A is an explanatory diagram of a state in which an O-ring is attached to the housing shown in the vertical cross-sectional view of FIG. 8 by a receiving-side rod-shaped portion and a pushing-side rod-shaped portion; FIG. (b) It is explanatory drawing which looked at the state of (a) from the diagonal. 1 is a perspective view of an extension tool according to a first embodiment of the present invention; FIG. Figure 12 is a front cross-sectional view of the extender of Figure 11; FIG. 4 is a flow diagram of an O-ring mounting method according to the first embodiment of the present invention; FIG. 4 is a partial cross-sectional view obliquely showing a state in which an O-ring is inserted into the O-ring mounting device according to the first embodiment of the present invention; FIG. 15 is a partial cross-sectional view obliquely showing a state in which the O-ring is pressed by the push-in side rod-shaped portion from the state of FIG. 14 ; FIG. 16 is a partial cross-sectional view obliquely showing a state in which the O-ring is further pressed by the push-in side rod-shaped portion from the state of FIG. 15 ; FIG. 4 is a partial cross-sectional view obliquely showing a state in which mounting of an O-ring to the O-ring mounting device according to the first embodiment of the present invention is completed; FIG. 5 is a flowchart showing a modification of the O-ring mounting method according to the first embodiment of the present invention; (a) It is the partial side view which looked at the front-end|tip of the push-in side rod-shaped part which concerns on the 2nd Embodiment of this invention from the side. (b) It is explanatory drawing which shows the state by which the O-ring is pressed by the push-in side rod-shaped part of (a). It is a front view of an O-ring mounting device according to a third embodiment of the present invention. FIG. 21 is a perspective view of the O-ring mounting device of FIG. 20 and a partially enlarged partial cross-sectional view thereof; 21 is a left side view of the O-ring mounting device of FIG. 20; FIG. 21 is a plan view of the O-ring mounting device of FIG. 20; FIG.

[First embodiment]
A first embodiment of the present invention will be described with reference to FIGS. 1 to 18. FIG. In the perspective view of FIG. 1, 11 is an O-ring mounting device. FIG. 1 shows an O-ring 12 to be installed by an O-ring installation device 11 . 1 and 2 also show the housing 13 to which the O-ring 12 is mounted. The housing 13 is formed in a tubular shape, and is bored with a substantially cylindrical rod hole 14 whose central axis is the center line C1. A housing groove 16 is formed in a housing inner peripheral surface 15 which is an inner peripheral surface of the rod hole 14 and extends around the housing inner peripheral surface 15 in the circumferential direction. In the figure, the direction of arrow U indicates the upper direction of the O-ring mounting device 11, and the direction of arrow D indicates the lower direction. The direction of arrow F similarly indicates the front, and the direction of arrow B similarly indicates the rear. Also, the direction of the arrow L similarly indicates the left direction, and the direction of the arrow R similarly indicates the right direction.

The O-ring mounting device 11 mounts the O-ring 12 in the housing groove 16 by pushing the O-ring 12 into the first opening 18 where the rod hole 14 opens upward using the rod-shaped push-in side rod-shaped part 17 . . The push-in side bar-shaped portion 17 is formed in a substantially cylindrical shape. The rod hole 14 has a second opening 19 that penetrates vertically and opens downward on the opposite side of the first opening 18 . The first opening 18 may be called "one opening", and the second opening 19 may be called "the other opening".

The O-ring mounting device 11 includes a rod-shaped receiving side rod-shaped portion 21 for receiving the O-ring 12 pushed by the push-in side rod-shaped portion 17 inside the rod hole 14 . The receiving-side rod-shaped portion 21 is arranged in the vertical direction and has a receiving-side end face 22 at its upper end. The receiving side end face 22 is formed in a circular shape in plan view, and has a receiving side bulging portion 23 that bulges closer to the center.

Further, the device main body 25, which is the main body of the O-ring mounting device 11, supports the housing holding portion 27 via the housing holding portion bracket 26. As shown in FIG. The housing holding portion 27 is formed in a substantially cylindrical shape and arranged so that its central axis coincides with the center line C1. A columnar holding portion hole 28 penetrates the housing holding portion 27 in the vertical direction, and the center axis of the holding portion hole 28 coincides with the center line C1. The receiving rod-shaped portion 21 is inserted into the holding portion hole 28 from below while the housing 13 is held by the housing holding portion 27 . Then, the receiving-side rod-shaped portion 21 passes through the holding portion hole 28 and is inserted upward into the rod hole 14 from the second opening 19 .

FIG. 3 shows a perspective view of an exploded state in which the O-ring mounting device 11 and the housing 13 are exploded. The housing holding portion 27 has an inserting portion 29 at its upper portion which is a cylindrical cavity whose center axis coincides with the center line C1 when the housing 13 is held. The vertical depth of the fitting portion 29 is smaller than the height of the housing 13 . Further, since the inner diameter of the fitting portion 29 substantially matches the outer diameter of the housing 13 , the lower portion of the housing 13 is fitted into the housing holding portion 27 at the fitting portion 29 . As a result, the housing 13 is accurately held at a predetermined position with respect to the apparatus main body 25 in the front, rear, left, and right directions.

The O-ring 12 is made of rubber such as nitrile rubber or ethylene propylene rubber, or an elastic material such as synthetic resin, and is formed in an annular shape with a circular cross section. The O-ring 12 is mounted in the housing groove 16 of the housing 13 and removed from the O-ring mounting device 11 together with the housing 13 after mounting, e.g. compressed in between. As a result, the O-ring 12 seals the rod hole 14 and the piston rod.

The receiving-side rod-shaped portion 21 is formed in a substantially columnar shape, and its central axis coincides with the center line C1 when inserted into the rod hole 14 . Further, the receiving-side rod-shaped portion 21 has a receiving-side convex bulging portion 31 in which the receiving-side end surface 22 of the receiving-side bulging portion 23 forms a convex, partially spherical surface. As shown in the side view of FIG. 4, the receiving-side convex bulging portion 31 occupies the vicinity of the center of the receiving-side end surface 22 in a plan view, and the surface thereof is inside the receiving-side rod-shaped portion 21 and on the center line C1. Draw a convex arc centered on the located arc center O1.

The receiving-side bulging portion 23 is formed around the receiving-side convex bulging portion 31 of the receiving-side end face 22 and has an annular shape in a plan view and a concave and partially spherical surface in a side view. It has a stop-side annular concave bulging portion 32 . As shown in FIG. 4 , the receiving-side annular concave bulging portion 32 draws a concave circular arc whose surface is located above the receiving-side rod-shaped portion 21 and centered on the arc center O2. Arc center O2 is not shown.

On the other hand, when the O-ring 12 is pushed into the rod hole 14, it is first elastically deformed and enters the rod hole 14 in a slightly vertically elongated state. This state is shown in FIGS. 5 to 7 show the transition of the state in which the O-ring 12 is pushed down by the pushing-side rod-shaped portion 17 inside the rod hole 14 and supported by the receiving-side rod-shaped portion 21 in order. 5 and 6 are schematic diagrams of the O-ring 12 viewed from a direction orthogonal to the center line of the annular ring. Each (b) is a schematic view of (a) rotated 90 degrees clockwise in plan view around the center line C1. Each (c) shows a state in which (b) is surrounded by a housing 13 and an extender to be described later. Each (d) shows a perspective view of (c) seen obliquely.

FIG. 7 is a view viewed from the same direction as FIGS. 5(a) and 6(a) described above. That is, when the O-ring 12 is viewed from a direction perpendicular to the center line of the annular ring, the O-ring 12, the pushing-side rod-shaped portion 17, and the receiving-side rod-shaped portion 21 are surrounded by the housing 13 and an extension tool, which will be described later. show.

As described above, since the receiving-side bar-shaped portion 21 has the receiving-side bulging portion 23, the O-ring tip 12a, which is the leading end of the O-ring 12 in the advancing direction, is formed into the receiving-side bulging portion 23 that bulges upward. By abutting, the O-ring tip 12a slides on the surface of the receiving side end face 22 in any direction of 360° around the receiving side swelling part 21 while avoiding the top part of the receiving side swelling part 23. be able to.

Moreover, since the central portion of the receiving side bulging portion 23 is formed in the receiving side convex bulging portion 31, the O-ring tip 12a can be reliably moved forward and backward 360 while avoiding the top portion of the receiving side bulging portion 21. °It can slide on its surface in any direction. In particular, since the receiving-side convex bulging portion 31 is formed into a partially spherical surface, the O-ring tip 12a can slide without being caught on the receiving-side bulging portion 21 . This state is shown in FIGS. 6(a) to 6(d).

Further, by forming this partial spherical surface, the O-ring tip 12a can slide in the most slippery direction according to the posture of the O-ring 12 when it comes into contact with the receiving-side convex bulging portion 31. Furthermore, it is possible to slide without being caught by the bulging portion 21 on the receiving side.

By the way, the receiving-side rod-shaped portion 21 is supported at a position where the receiving-side end surface 22 forms an O-ring introduction path 36 continuously with the inner wall facing upward in the direction of the first opening 18 of the housing groove 16 . configured as The inner wall facing upward in the vertical direction, which is the orientation of the first opening 18 , is called a bottom inner wall 35 . FIG. 8 shows a longitudinal section of the housing 13, showing a state in which the housing inner peripheral surface 15 of the housing 13 is formed with three stages of housing grooves 16. As shown in FIG. They are called an upper housing groove 16a, a middle housing groove 16b, and a lower housing groove 16c in order from the top. Each of the housing grooves 16a to 16c has a bottom inner wall 35, which is called an upper bottom inner wall 35a, a middle bottom inner wall 35b and a lower bottom inner wall 35c.

As shown in FIG. 1, the receiving-side rod-shaped portion 21 is supported upward by a receiving-side rod-shaped portion elevating means 38 which is supported by the device main body 25 via a bracket 37 for receiving-side rod-shaped portion elevating means. there is The receiving-side rod-shaped portion elevating means 38 can vertically move and fix the receiving-side rod-shaped portion 21 . Therefore, by moving the receiving-side rod-shaped portion elevating means 38 up and down, the vertical fixing positions of the receiving-side rod-shaped portion 21 corresponding to the three housing grooves 16a to 16c as shown in the longitudinal sectional view of FIG. can be changed. 9(a) and 9(b) show an example of a state in which the receiving-side rod-shaped portion 21 is fixed in the vertical position with respect to the housing 13. FIG. FIG. 9(a) shows a combined view of the longitudinal section of the housing 13 and the side surface of the receiving-side rod-shaped portion 21. FIG. FIG. 9(b) shows an oblique view of these components. For example, as shown in FIGS. 9(a) and 9(b), the receiving side rod-shaped portion 21 can be fixed at a position corresponding to the upper housing groove 16a, and similarly, the middle housing groove 16b and the lower housing groove 16c can be fixed. can be fixed in the corresponding position. Incidentally, the receiving-side rod-shaped part elevating means 38 may be of a mechanical type, a hydraulic type, a pneumatic type, or an electric type.

As shown in FIG. 9, the receiving-side bar-shaped portion 21 can be fixed at a position where the periphery of the receiving-side end face 22 is flush with the upper bottom inner wall 35a. Also, it can be fixed at a position flush with the middle bottom inner wall 35b or the lower bottom inner wall 35c. For example, by fixing it at a position flush with the upper bottom inner wall 35a, as indicated by the arrow in the drawing, it extends radially outward from the vicinity of the center of the receiving side end surface 23 in a plan view, and the receiving side end surface An O-ring introduction path 36 can be formed continuously from the periphery of 23 to reach the upper housing groove 16a. The O-ring introduction path 36 is formed in all directions of 360° in the left, right, front, and rear directions from the vicinity of the center of the receiving side end surface 23 in a plan view.

In this manner, the O-ring mounting device 11 has the receiving side rod-shaped portion 21 inserted from the second opening 19 of the rod hole 14, and the receiving side end surface 22 of the receiving side rod-shaped portion 21 is positioned at the central receiving portion. Since it has the side bulging portion 23 and the receiving side end surface 22 forms an O-ring introduction path 36 continuously with the housing groove 16 , the rod hole 14 is inserted through the first opening 18 of the same rod hole 14 by the push-in side rod-shaped portion 17 . The pushed-in O-ring 12 is received by the receiving-side swelling portion 23 and then guided toward the housing groove 16 .

Moreover, since the receiving side annular concave bulging portion 32 having the concave partial spherical surface is provided, the receiving side bulging portion 23 is inclined toward the radially outer side of the receiving side annular concave bulging portion 32 . is small and approaches horizontally. Therefore, as the O-ring 12 slides on the receiving side end surface 22, it is guided to the receiving side annular concave bulging portion 32, and can seamlessly change its posture from the vertical direction to the horizontal direction. This state is shown in FIG.

The O-ring 12 moves on the O-ring introduction path 36 formed continuously by the receiving-side end face 22 and the bottom inner wall 35 by sliding the O-ring tip 12a on the surface of the receiving-side end face 22. , can change its position from vertical to horizontal and reach the housing groove 16 . In the process, the shape of the O-ring 12 follows the housing groove 16 so that it returns from the vertically long state to the circular shape. 10(a) and 10(b) show a state in which the push-in side bar-shaped portion 17 has been lowered and the O-ring 12 has been completely installed in the housing groove 16. FIG. FIG. 10(a) shows a combined view of the longitudinal section of the housing 13 and the side surface of the receiving-side rod-shaped portion 21, similar to FIG. 9(a). FIG. 10(b) shows an oblique view of these.

The receiving-side rod-shaped portion 21 is made of polytetrafluoroethylene (PTFE). Moreover, even if the entire receiving-side rod-shaped portion 21 is not made of polytetrafluoroethylene, only the tip portion including the receiving-side end face 22 may be made of polytetrafluoroethylene.

Since polytetrafluoroethylene (PTFE) has a small coefficient of friction, the O-ring 12 can easily slide on the surface of the receiving-side swelling portion 23 . Moreover, the O-ring 12 is less likely to be damaged by friction with the receiving-side swelling portion 23 when sliding on the surface of the receiving-side swelling portion 23 and moving on the O-ring introduction path 36 . Furthermore, even when a lubricant such as grease is used to move the O-ring 12 more smoothly, the durability of the receiving-side bar portion 21 is high because polytetrafluoroethylene has high chemical resistance.

The O-ring fitting device 11 includes an extension 41 that is positioned on the upper side of the housing 13 as shown in FIG. FIG. 11 represents a perspective view of the extension tool 41, and FIG. 12 represents a longitudinal sectional view of the extension tool 41 as viewed from the front. The extension tool 41 is formed in a cylindrical shape, and has a columnar through hole 42 extending therethrough in the vertical direction. A center line C2 of the through hole 42 coincides with the central axis of the extension tool 41 . The through-hole 42 has an extension tool first opening 43 that opens upward and an extension tool second opening 44 that opens downward. The extension tool 41 has an insertion part 45 which is a cylindrical cavity in the lower part. The inner diameter of the insertion portion 45 substantially matches the outer diameter of the housing 13 . As a result, the extension tool 41 is arranged above the housing 13 so that the insertion portion 45 embraces the upper portion of the housing 13 from above. Further, the extension tool second opening 44 has the same diameter as the first opening 18 of the rod hole 14 .

The extension tool 41 is supported from the right side of the extension tool 41 by an extension tool holder 46 as shown in FIG. The extension tool holder 46 is supported by the device main body 25 via the extension tool holder elevating means 47 . The extension tool holder elevating means 47 can vertically move and fix the extension tool holder 46 . For example, in FIG. 3, the pair of legs 48, 48 of the extension tool holder 46 stored inside the extension tool holder elevating means 47 is extended upward to raise the extension tool holder 46 and the extension tool 41. Indicates status. With the extension tool holder 46 and the extension tool 41 raised in this manner, the housing 13 is free to be lifted upward. As a result, the housing 13 whose lower portion is fitted in the fitting portion 29 of the housing holding portion 27 can be lifted up and removed. The extension tool holder elevating means 47 may be mechanical, or may be hydraulic, pneumatic, or electric.

In a state in which the housing 13 is held by the housing holding portion 27, the extension tool 41 is held by the extension tool holder 46, and both the housing holding part 27 and the extension tool holder 46 are supported by the device main body section 25, the extension tool is installed. 41 is arranged on the upper side of the housing 13 . At this time, the center line C1 of the rod hole 14 and the center line C2 of the through hole 42 are aligned. Then, the extension tool second opening 44 of the through-hole 42 and the first opening 18 of the rod hole 14 overlap in the vertical direction. As a result, the through hole 42 communicates with the rod hole 14 without a step.

As a result, by supporting the extension tool 41 so that the through-hole 42 communicates with the first opening 18 of the rod hole 14 , the O-ring 12 inserted from above by the pushing-side rod-shaped portion 17 can pass through the extension tool 41 . The first opening 18 can be reached through the hole 42 . At this time, the O-ring 12 is pushed by the push-in side rod-shaped portion 17 and stabilizes its posture while passing through the through-hole 42 , so that the O-ring 12 can reliably take a vertically long posture at the stage of entering the rod hole 14 . can. As a result, the O-ring 12 can contact the center of the receiving-side bulging portion 23 at the O-ring tip 12a, and can slide on the receiving-side end face 22 without failure.

The through-hole 42 has a pair of guide grooves 48, 48 which are opposed to each other with the center line C2 interposed therebetween and recessed in a direction away from the center line C2. Each guide groove 48 is set so that the width in the front-rear direction is slightly wider than the thickness of the O-ring 12 to which it is attached. As shown in FIGS. 11 and 12, the guide grooves 48 are arranged in pairs on the left and right sides, and are recessed leftward and rightward, respectively. The bottom of each guide groove 48 is linearly inclined so that the depth on the lower side is smaller than the depth on the upper side. As a result, the pair of guide grooves 48, 48 are formed in a V shape with their bottoms opening upward. As shown in FIG. 3 , the extension tool 41 is adjacent to the housing 13 so that the extension tool second opening 44 positioned on the lower side is connected to the first opening 18 of the housing 13 .

Since the pair of guide grooves 48, 48 provided in the through hole 42 are thus provided deeper toward the entrance, the O-ring 12 is pushed by the bottom of each guide groove 48 as it approaches the housing 13 adjacent to the extension member 41. , is pushed into the rod hole 14 in a more vertically elongated state. This allows the O-ring 12 to enter the rod hole 14 in a more stable posture.

The flowchart of FIG. 13 shows an O-ring mounting method S100, which is an example of a method for mounting the O-ring 12 in this embodiment. The O-ring mounting method S100 sequentially includes a preparation step S110, an extension tool supporting step S120, a receiving side rod portion supporting step S130, and a pushing side rod portion entering step S140.

In the preparation step S110, the O-ring 12, the housing 13, the housing holding portion 27, the receiving rod portion 21, the extension tool 41 and other works, the components of the O-ring mounting device 11, and the like are prepared. Each component is prepared with a dimension matching the O-ring 12 and the housing 13 to be mounted. These are supported by the housing holding portion bracket 26, the receiving side rod-shaped portion elevating means bracket 37, the receiving side rod-shaped portion elevating means 38, the extension tool holder 46, the extension tool holder lifting means 47, and the like. Arrange as shown in FIG. At this time, the housing 13 is placed on the upper side of the housing holding portion 27 and held from below so that the center line C1 of the rod hole 14 is aligned with the vertical line. Further, in order to secure a space above the housing holding portion 27, the extension tool holder 46 is raised when the housing 13 is placed on the housing holding portion 27. As shown in FIG.

In the extension tool supporting step S120, the extension tool 41 is supported at a predetermined position. After the housing 13 is held by the housing holding portion 27 from the state shown in FIG. 3, the extender holder 46 supporting the extender 41 is lowered. At this time, the extension tool holder 46 descends by housing the pair of legs 48, 48 extending downward from the extension tool 46 in the extension tool holder elevating means 47. As shown in FIG. As a result, as shown in FIG. 1, the insertion portion 45 of the extension tool 41 covers the housing 13 from above, and the extension tool 41 is arranged above the housing 13 . Further, as a result, the extension tool second opening 44 and the first opening 18 of the rod hole 14 overlap each other, and the through hole 42 and the rod hole 14 communicate with each other. As shown in FIG. 12, the extension tool 41 is supported in such a posture that the recessed direction of each guide groove 48 coincides with the left-right direction.

In the receiving-side rod-shaped portion supporting step S130, the upper end of the receiving-side rod-shaped portion 21 is passed through the holding portion hole 28 of the housing holding portion 27 from below, and then inserted from below the second opening 19 of the rod hole 14. do. Then, the receiving side end face 22 is raised until it becomes flush with the bottom inner wall 35 of the predetermined housing groove 16, thereby forming an O-ring introduction path 36 in which the receiving side end face 22 and the bottom inner wall 35 are continuous. It supports the receiving side rod-shaped portion 21 at the position. 14 to 17, the receiving side bar portion 21 is supported so that the receiving side end face 22 is flush with the upper bottom inner wall 35a of the upper housing groove 16a. This state is also shown in the longitudinal sectional views of FIGS. 9 and 10. FIG. In order to move the receiving side bar 21 from the position shown in FIG. 1 to these positions, the receiving side bar elevating means 38 to which the lower end of the receiving side bar 21 is fixed is lifted. The receiving-side rod-shaped portion 21 is vertically lifted by the receiving-side rod-shaped portion elevating means 38 and fixed at a position where the height of the receiving-side end surface 22 and the height of the bottom inner wall 35 are the same.

In the push-side rod-shaped portion entering step S140, the O-ring 12 is first inserted into the through hole 42 of the extension tool 41 from above by pressing the lower end of the push-side rod-shaped portion 17 downward. As shown in FIG. 14, the O-ring 12 is inserted in such a posture that the central axis of the ring is in the front-rear direction. At this time, the O-ring 12 is pushed downward along the left and right guide grooves 48 , 48 . Then, as shown in FIG. 15, the O-ring 12 is carried downward by the push-in side rod-shaped portion 17, pushed left and right by the bottom of each guide groove 48, and is elastically deformed into a slightly elongated shape in the vertical direction while advancing downward. do.

Next, as shown in FIG. 16, the O-ring 12 slides on the surface of the receiving-side bulging portion 23 as the O-ring 12 abuts against the receiving-side end surface 22 as the push-in side rod-shaped portion 17 moves downward. At the same time, the posture gradually begins to tilt horizontally. Also, at this time, the O-ring 12 is pushed between the push-in side rod-shaped portion 17 and the receiving-side rod-shaped portion 21 and is elastically deformed so as to bend forward and slightly upward. The O-ring tip 12a faces forward. This state is also shown in FIGS. Finally, as shown in FIG. 17, the push-in side rod-shaped portion 17 stops descending when the lower end of the push-in side rod-shaped portion 17 reaches the housing groove 16 . In this state, as shown in FIG. 10, the O-ring 12, which has entered the rod hole 14, is fitted in the housing groove 16 in a horizontal posture to complete the mounting. At this time, the O-ring 12 is mounted in the housing groove 16 in an annular shape with a smaller diameter due to elastic deformation than before deformation.

Although not shown, the housing 13 to which the O-ring 12 is attached is removed upward from the housing holding portion 27 after the extension tool 41 is first lifted. The housing 13 is then ejected from the O-ring mounting device 11 .

Note that the order of the extension tool supporting step S120 and the receiving side rod-shaped portion supporting step S130 may be reversed. At this time, the receiving-side rod-shaped portion 21 is raised and inserted into the rod hole 14 , and then the extension tool 41 is arranged above the housing 13 . Alternatively, the extension tool supporting step S120 and the receiving-side bar-shaped portion supporting step S130 may proceed simultaneously. An example of the case where the extension tool supporting step S120 and the receiving side rod-shaped portion supporting step S130 are performed simultaneously is shown in the flowchart of FIG. 18 as the O-ring mounting method S200.

According to the O-ring mounting methods S100 and S200 described above, the O-ring 12 and the housing 13 can be selected and prepared in the preparation step S110. In addition, the housing holding portion 27, the pushing-side rod-shaped portion 17, the receiving-side rod-shaped portion 21, and the extension tool 41 of dimensions, specifications, materials, etc. suitable for the O-ring 12 and housing 13 to be prepared are selected and prepared. The housing 13 and the housing retainer 27 can be assembled.

Further, since the O-ring mounting methods S100 and S200 include the extension tool support step S120, the extension tool 41 is supported so that the through hole 41 communicates with the first opening 18 of the rod hole 14, and the O-ring 12 is attached to the extension tool. The first opening 18 can be reached through the through hole 42 of 41 . Therefore, the posture of the O-ring 12 is stabilized while it is pushed by the push-in side rod-shaped portion 17 and passes through the through hole 41, and the posture of the O-ring 12 can be reliably taken in a vertically long posture at the stage of entering the rod hole 14. . As a result, the O-ring 12 can contact the center of the receiving-side bulging portion 23 at the O-ring tip 12a, and can slide on the receiving-side end face 22 without failure.

Further, in the receiving-side rod-shaped portion supporting step S130 of the O-ring mounting methods S100 and S200, the O-ring introduction path 36 is formed by the receiving-side end surface 22 and the bottom inner wall 35 in alignment with the position of the housing groove 16 of the housing 13. The receiving-side rod-shaped portion 21 can be supported at a location where it is possible to do so. At this time, when mounting the O-rings 12 in two or more housing grooves 16a, 16b, and 16c in one housing 13, the receiving side rod-shaped portion 21 is aligned with the positions of the respective housing grooves 16a, 16b, and 16c. By changing the insertion depth, the receiving-side rod-shaped portion 21 can be supported at each corresponding location. Thus, by preparing only one receiving-side rod-shaped portion 21 for one housing 13, each housing groove 16a, 16b, 16c can be dealt with. Further, when the O-ring mounting methods S100 and S200 are applied to an automatic machine, for example, the receiving-side rod-shaped portion elevating means 38 having a drive for vertically moving the receiving-side rod-shaped portion 21 with respect to the housing 13 is used. , it is possible to adjust the position of the receiving-side rod-shaped portion 21 corresponding to each of the housing grooves 16a, 16b, 16c by controlling this drive.

Further, since the O-ring mounting methods S100 and S200 include the pushing-side rod-shaped portion entering step S140, the position of the housing groove 16 of the housing 13 and the position of the receiving-side rod-shaped portion 21 supported by the receiving-side rod-shaped portion supporting step S130 The depth to which the push-in side rod-shaped portion 17 enters can be changed and determined according to the position. Further, when the O-ring mounting methods S100 and S200 are applied to an automatic machine, for example, by providing a driving device for vertically reciprocating the push-in side rod-shaped portion 17 with respect to the housing 13, the housing can be adjusted. 13, it is possible to change the range in which the push-in side rod-shaped portion 17 operates.

In the push-in side rod-like portion entering step 140, the O-ring 12 can move along the O-ring introduction path 36 and reach the housing groove 16. Therefore, the O-ring can be easily assembled with a simple structure and easy work and operation. 12 can be attached to housing 13 . Moreover, since the friction applied to the O-ring 12 is small, the possibility of damaging it is also small.

The entire structure for mounting the O-ring 12 on the housing 13 using the O-ring mounting device 11 may be called an O-ring mounting structure 11A. This O-ring mounting structure 11A uses the above-described rod-shaped push-in side rod-shaped portion 17 to insert the O-ring 12 into the first opening 18 of the rod hole 14 drilled in the tubular housing 13. An O-ring mounting structure for mounting an O-ring 23 in a housing groove 16 formed around the inner peripheral surface of a rod hole 14 by pushing it in, wherein a housing holding portion 27 holds and receives the housing 24. The side rod-shaped portion 21 is supported at a position where the receiving side end surface 22, which is the end surface of one end thereof, is continuous with the bottom inner wall 35 facing the first opening 18 of the housing groove 16 to form an O-ring introduction path 36. The receiving side end surface 22 is configured to receive the O-ring 12 pushed by the pushing side rod-shaped portion 21 inside the rod hole 14, and the receiving side end surface 22 bulges toward the center of the receiving side end surface 22. The O-ring 12 has a bulging portion 23, and the O-ring tip 12a contacts the receiving-side bulging portion 23 when the O-ring 12 is pushed through the first opening 18, and the O-ring tip 12a becomes the receiving-side bulging portion. It is an O-ring mounting structure characterized in that it slides around the receiving side bulging portion 23 while avoiding the 23 and moves on the O-ring introduction path 36 to reach the housing groove 16 .

[Second embodiment]
A second embodiment of the present invention will be described with reference to FIGS. FIG. 19(a) represents a partial side view showing the lower end of the push-in side bar-shaped portion 17. FIG. The push-in side bar-shaped portion 17 has a push-in side protruding portion 52 that protrudes downward near the center of the push-in side end face 51 that is the lower end face. The push-in side projecting portion 52 is formed in a truncated cone shape whose center axis coincides with the center line C1 and whose diameter decreases toward the bottom. The push-in side end face 51 has a push-in side annular portion 53 around the push-in side projecting portion 52, which is annular in a plan view.

In FIG. 19(b), similarly to FIG. 7, as the O-ring 12 slides on the receiving side end surface 22, it is guided to the receiving side annular recessed bulging portion 32, and the posture is seamlessly changed from the vertical direction to the horizontal direction. Represents a state of change. As in FIG. 16, the O-ring 12 is pushed downward by the push-in side rod-shaped portion 17 with the O-ring tip 12a facing forward. Then, the O-ring tip 12a reaches the upper housing groove 16a through an O-ring introduction path 36 in which the receiving side end surface 22 and the upper bottom inner wall 35a are continuously formed. As a result, the entire O-ring 12 is mounted in the upper housing groove 16a.

Other configurations are common to the first embodiment.

With such a configuration, when the push-in side bar-shaped portion 17 pushes the O-ring 12 to enter the rod hole 14 , the rear end 12 b of the O-ring 12 is pushed backward by the push-in side projecting portion 52 . be suppressed. Therefore, the O-ring rear end 12b does not stay near the center of the push-in side end face 51. As shown in FIG. As a result, the degree of vertical force applied to the O-ring 12 between the push-in rod-shaped portion 17 and the receiving-side rod-shaped portion 21 is reduced. Does not bend. As a result, the O-ring 12 can smoothly change its posture from the up-down direction to the front-rear direction without being bent in two, and the O-ring tip 12a can easily reach the housing groove 16.例文帳に追加

[Third Embodiment]
A third embodiment of the present invention will be described with reference to FIGS. 20 to 23. FIG. In the front view of FIG. 20, 111 is an O-ring mounting device. The O-ring mounting device 111 has a device main body 125 substantially in the center in the front-rear direction. The device main body 125 has legs and is placed on the floor to stand on its own. Further, the O-ring mounting device 111 has a robot 161 behind the device main body 125 . The robot 161 is placed directly on the floor and stands on its own. The robot 161 has a pair of arms 162 extending forward from the top. Each arm 162 has a vertical rotation shaft 163 and a horizontal robot hand 164 pivotally attached to the rotation shaft 163 . The arm part 162 and the robot hand 164 can freely move up, down, left, right, forward and backward by the operation of the robot 161 , and their movements are controlled by the robot 161 .

Further, the O-ring mounting device 111 has a pair of O-ring conveying portions 165 on the front side of the device body portion 125 . Each O-ring transport 165 has a front-to-back conveyor belt. In addition, each O-ring conveying part 165 has a leg and is placed on the floor to stand on its own. Furthermore, the O-ring mounting device 111 has a plurality of housing trays 166 on the left and right sides of the robot 161 . Each housing tray 166 is installed on the left and right tables, and these tables are placed on the floor to stand on their own. A housing tray 166 contains a plurality of housings 113 .

The O-ring mounting device 111 has a programmable controller system (not shown). A programmable controller system is a system consisting of a programmable controller and related peripheral devices defined in JIS B3501 "Programmable Controller General Information", and is sometimes abbreviated as a PLC system, a sequencer, or the like. This programmable controller system is hereinafter referred to as a "sequencer (S)". The sequencer S is connected to the robot 161, each driving device described below, and the like. These connections may be wired or wireless. Also, the sequencer S may be installed beside the O-ring mounting device 111, or may be installed in a location away from the O-ring mounting device 111, such as in a separate room.

FIG. 21 represents a perspective view of the O-ring mounting device 111 viewed from the upper left and slightly behind. In the device main body 125 of the O-ring mounting device 111, the housing 113, the push-in side rod-shaped portion 117, the receiving side rod-shaped portion 121, the housing holding portion bracket 126, the housing holding portion 127, the receiving side rod-shaped portion elevating means 138, the extension The positions where the tool 141, the extension tool holder 146, the extension tool holder elevating means 147, etc. are arranged are indicated by arrows in the figure. The arrangement of each component in the upper right enlarged view is common to FIG. In the present embodiment, the O-ring mounting device 111 includes two sets of left and right push-in rod-shaped portions 117, a receiving-side rod-shaped portion 121, a housing holding portion bracket 126, a housing holding portion 127, a receiving-side rod-shaped portion elevating means 138, It has an extension tool 141, an extension tool holder 146, an extension tool holder elevating means 147, and the like. For example, one set may fit O-rings 112 in a relatively large diameter housing 113 and the other set may fit O-rings 112 in a relatively small diameter housing 113 . In the following description, the left set will be mainly described. It should be noted that only one set, either the left or the right, may be provided as these sets.

22 represents a left side view of the O-ring mounting device 111. FIG. In the O-ring mounting device 111, the push-in side rod-shaped portion 117 is held by the arm portion 162 directly below the arm portion 162 so that the vertical direction thereof coincides with the vertical direction. The arm portion 162 can move to a position where the center line C4 of the push-in side rod-shaped portion 117 it holds coincides with the center line C1 of the rod hole 114 of the housing 113 arranged in the apparatus main body portion 125 . Further, the arm portion 162 can reciprocate the push-in side bar portion 117 in the vertical direction. In this specification, the robot 161 including the arm portion 162 may be referred to as push-in side rod-shaped portion driving means.

23 represents a plan view of the O-ring mounting device 111. FIG. The O-ring conveying unit 165 of the O-ring mounting device 111 places a plurality of O-rings 112 to be mounted on the housing 113 on the conveyor belt and conveys them backward from the front end. The O-ring conveying unit 165 has a conveyor belt driving device, and its driving is controlled by a sequencer S that receives an instruction from the robot 161 through communication. The transported O-ring 112 is picked up by a hand portion 168 provided at the tip of the robot hand 164 . At this time, the arm portion 162 moves and the robot hand 164 rotates around the rotation shaft 163, or the arm portion 162 moves and the robot hand 164 rotates, whereby the hand portion 168 picks up the O-ring 112. The position of the hand part 168 is adjusted so that Similarly, the hand portion 168 can be moved to transfer the picked-up O-ring 112 to the upper side of the extension tool 141 .

Similarly, the robot hand 164 can adjust the position of the hand portion 168 and pick up one of the housings 113 accommodated in the housing tray 166 by the hand portion 168 . Further, by similarly moving the hand portion 168 , the picked up housing 113 can be transferred to above the housing holding portion 127 . Further, the housing 113 with the O-ring 112 attached can be lifted from the housing holding portion 127 and carried out.

Other configurations are common to the first embodiment or the second embodiment.

An example of the mounting method of the O-ring 112 in this embodiment will be described below along the O-ring mounting method S100 or the O-ring mounting method S200 illustrated in the first embodiment.

In the preparation step S110, the O-ring 112, the housing 113, the housing holding portion 127, the push-in side rod-shaped portion 117, the receiving side rod-shaped portion 121, the extension tool 141 and other workpieces, the components of the O-ring mounting device 111, and the like are prepared. prepare. Each component is prepared with a dimension matching the O-ring 112 and the housing 113 to be mounted. The housing holding portion 127 is attached to a housing holding portion bracket 126 fixed on the device main body portion 125 . The push-in side rod-shaped portion 117 is held downward by the arm portion 162 as described above. The receiving-side rod-shaped portion 121 is held upward by the receiving-side rod-shaped portion elevating means 138 . The extension tool 141 is supported from the right side by an extension tool holder 146 . A plurality of O-rings 112 are placed on a conveyor belt from the front end of an O-ring carrier 165, and are sequentially conveyed backward by the conveyor belt. Then, the rear end of the O-ring carrier 165 is carried to a position where it is picked up by the hand section 168 .

Before the extension tool supporting step S120, the housing 113 is picked up from the housing tray 166 by the hand section 168 and brought to just above the housing holding section 127 by the movement of the arm section 162 and the robot hand 164. FIG. Then, the arm portion 162 and the robot hand 164 descend, and the lower portion of the housing 113 is fitted into the fitting portion 129 of the housing holding portion 127 and fixed. When the extension tool 141 is lowered before the housing 113 is brought to the position directly above the housing holding part 127, the extension tool holder elevating means 147 first raises the extension tool holder 146, thereby holding the housing. The robot hand 164 carries the housing 113 into the space between the portion 127 and the extension 141 . The extension tool holder elevating means 147 has a driving device for vertically moving the pair of legs 148, 148 of the extension tool holder 146, and its driving is controlled by the sequencer S which receives instructions from the robot 161 by communication.

In the extension tool supporting step S120, the extension tool holder 146 supporting the extension tool 141 is lowered. At this time, the extension tool holder 146 is lowered by housing the pair of legs 148, 148 in the extension tool holder lifting means 147. As shown in FIG. As a result, the insertion portion 145 of the extension tool 141 covers the housing 113 from above, and the extension tool 141 is arranged above the housing 113 .

In the receiving-side rod-shaped portion supporting step S130, the upper end of the receiving-side rod-shaped portion 121 is passed through the holding portion hole 128 of the housing holding portion 127 from below, and then inserted from below the second opening 119 of the rod hole 114. do. The receiving-side rod-shaped part elevating means 138 has a driving device for moving the receiving-side rod-shaped part 121 up and down, and its driving is controlled by the sequencer S which receives an instruction from the robot 161 through communication. At this time, if the housing 113 has a plurality of housing grooves 116, the robot 161 determines in which housing groove 16 the O-ring 112 is to be fitted. At the same time, the receiving-side rod-shaped portion elevating means 138 is activated. As a result, the position of the receiving side rod-shaped portion 121 is adjusted so that the receiving side end surface 122 is flush with the bottom inner wall 135 of the predetermined housing groove 116 .

Before the pushing-side rod-like portion entering step S140, the arm portion 162 and the robot hand 164 are operated to transfer the O-ring 112 picked up by the hand portion 168 to the upper side of the extension tool 141. After this transfer, the O-ring 112 is held in a posture in which the central axis of the ring is in the front-rear direction, and the left and right ends are inserted into the left and right guide grooves 148 , 148 of the extension tool 141 . In this state, the hand part 168 releases the O-ring 112 .

In the pushing-side rod-shaped portion entering step S140, after the arm portion 162 has moved to a position where the center line C1 of the rod hole 114 of the housing 113 and the center line C4 of the pushing-side rod-shaped portion 117 coincide, the pushing-side rod-shaped portion 117 is moved. By lowering, the O-ring 112 is pressed downward by the lower end of the push-in side bar-shaped portion 117 . As a result, the O-ring 112 is inserted into the through hole 142 of the extension tool 141 and pushed downward along the left and right guide grooves 148 , 148 . As the push-in side rod-shaped portion 117 descends, the posture of the O-ring 112 gradually begins to tilt in the horizontal direction. At this point, the lower end of the push-in side rod-shaped portion 117 reaches the housing groove 116 , and the robot 161 stops lowering the push-in side rod-shaped portion 117 by the arm portion 162 .

Owing to such a configuration, the O-ring mounting device 111 of the present invention is less likely to damage the O-ring 112 and has a simple structure. The O-ring 112 can then be attached to the housing 113 with a simple motion. Therefore, automation is possible by providing a robot 161 capable of reciprocating the push-in side rod-shaped portion 117 . As a result, compared to the case where the operator manually operates the push-in side rod-shaped portion 117, it is possible to save labor in the process. Further, by repeating the optimum operation through this automation, the possibility of damaging the O-ring 112 is smaller than when the operator manually operates the push-in side rod-shaped portion 117 .

Although the embodiments of the present invention have been exemplified above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, although the housings are represented in the figures as having a diameter greater than their vertical length, these housings may have a diameter equal to or less than their vertical length. good too.

In addition, in the step of entering the pushing-side rod-shaped portion, the pushing-side rod-shaped portion may press the O-ring downward not only once but also multiple times to the extent that the O-ring is not damaged. As a result, even if the O-ring is incompletely attached to the ring groove, the push-in side rod-like portion can reliably attach the O-ring in the second or subsequent times by pressing multiple times. The O-ring mounting device may be provided with detection means for detecting the mounting state of the O-ring, and may be controlled to press twice or more only when incomplete mounting is detected.

Furthermore, the O-ring is not necessarily mounted in the housing groove in an annular state with a smaller diameter than before mounting due to elastic deformation, and may be mounted in the housing groove with the same diameter as before mounting. . In the preparatory step, the housing is dimensioned according to the application, role, size, etc. of the O-ring to achieve the desired deformation state when installed in the housing groove.

INDUSTRIAL APPLICABILITY The present invention can be used in an O-ring mounting device for mounting an O-ring in a housing groove of its housing.

11 O-ring mounting device (hereinafter, 3-digit code with 1 added to the first digit is the same)
12 O-ring 13 Housing 14 Rod Hole 15 Housing Inner Peripheral Surface 16 Housing Groove 17 Push-In Side Rod-Shaped Portion 18 First Opening (One Opening)
19 Second opening (other opening)
21 Receiving-side rod-shaped portion 22 Receiving-side end surface 23 Receiving-side bulging portion 25 Apparatus main body 26 Housing holding portion bracket 27 Housing holding portion 28 Holding portion hole 29 Fitting portion 31 Receiving-side convex bulged portion 32 Receptacle Stop-side annular recessed bulging portion 35 Bottom inner wall 36 O-ring introduction path 37 Receiving-side rod-shaped portion elevating means bracket 38 Receiving-side rod-shaped portion elevating means 41 Extension tool 42 Through hole 43 Extension tool first opening 44 Extension tool number 2 opening 45 insertion portion 46 extension tool holder 47 extension tool holder elevating means 48 guide groove 51 push-in side end surface 52 push-in side protruding part 53 push-in side annular part 161 robot 162 arm part 163 rotating shaft 164 robot hand 165 O-ring conveying part 166 Housing tray 168 Hand parts S100, S200 O-ring mounting method S110 Preparatory step S120 Extension member supporting step S130 Receiving side rod portion supporting step S140 Pushing side rod portion entering step

Claims (11)

O-ring mounting: inserting an O-ring into one of the openings of a rod hole drilled in a tubular housing and mounting the O-ring in a housing groove formed around the inner peripheral surface of the rod hole a device,
a rod-shaped push-side rod-shaped portion for pushing the O-ring;
a housing holding part capable of holding the housing;
A rod-shaped receiving-side bulging portion that bulges toward the center of the receiving-side end face at one end thereof for receiving the O-ring pushed in by the pushing-in rod-shaped portion inside the rod hole. and a receiving side rod-shaped portion having
The receiving-side rod-shaped portion is inserted from the other opening of the rod hole in a state in which the housing is held by the housing holding portion, and the receiving-side end face faces the one opening of the housing groove. An O-ring mounting device configured to be supported at a position forming an O-ring introduction path continuously with the facing inner wall.
The O-ring mounting device according to any one of claims 1 to 3, wherein the receiving-side bulging portion has a receiving-side convex bulging portion that forms a convex and partially spherical surface.
Further comprising an extension tool in which a through hole is drilled,
3. The extension tool can be supported so that the through hole communicates with the one opening of the rod hole when the housing is held by the housing holding portion. An O-ring mounting device as described.
The through hole has a pair of guide grooves arranged opposite to each other across the center line and recessed in a direction away from the center line,
each of the guide grooves has a depth on one side in the center line direction smaller than a depth on the other side in the center line direction;
The O-ring mounting device according to claim 3, wherein the extension tool is supported so that the one side is adjacent to the housing.
2. The receiving-side bulging portion has a receiving-side annular concave bulging portion forming an annular concave and partially spherical surface around the receiving-side convex bulging portion. 5. An O-ring mounting device according to any one of 1 to 4.
The O-ring mounting device according to any one of claims 1 to 5, wherein the one end portion including at least the receiving side end surface of the receiving side rod-shaped portion is made of polytetrafluoroethylene.
7. The push-in side rod-shaped portion, and push-in side rod-shaped portion driving means for holding the push-in side rod-shaped portion and capable of reciprocating in a hole direction of the rod hole are further provided. The O-ring mounting device according to .
8. The O-ring mounting device according to claim 7, wherein the tip of the push-in side rod-shaped part has a push-in side protruding part protruding near the center of the push-in side end face, which is the end face of the push-in side rod-shaped part.
A rod-shaped push-side rod-shaped portion is used to push an O-ring into one opening of a rod hole drilled in a tubular housing to form a housing formed around the inner peripheral surface of the rod hole. An O-ring mounting structure for mounting the O-ring in the groove,
A housing holding portion holds the housing, and a receiving-side end surface of the receiving-side rod-shaped portion is connected to the inner wall facing the one opening of the housing groove to form an O-ring introduction path. supported in a position forming
The receiving-side end face is configured to receive the O-ring pushed by the pushing-side rod-shaped portion inside the rod hole, and the receiving-side swelling bulges closer to the center of the receiving-side end face. having an outlet,
The O-ring is pushed in through one of the openings, and the forward end of the O-ring abuts against the receiving-side bulging portion. An O-ring mounting structure, wherein the O-ring mounting structure is characterized in that it slides around the projecting portion, moves on the O-ring introduction path, and reaches the housing groove.
O-ring mounting: inserting an O-ring into one of the openings of a rod hole drilled in a tubular housing and mounting the O-ring in a housing groove formed around the inner peripheral surface of the rod hole a method,
The O-ring, the housing, a housing holding part, a rod-shaped push-side rod-shaped part configured to push the O-ring into the one opening, and a rod-shaped receiving side that is an end face at one end a preparation step of preparing a receiving-side rod-shaped portion having a receiving-side bulging portion that bulges closer to the center of the end face, and holding the housing by the housing holding portion;
The one end side of the receiving side rod-shaped portion is inserted from the other opening of the rod hole, and the receiving side end surface of the receiving side rod portion is continuously connected to the inner wall facing the one opening of the housing groove and an O-ring is introduced. a receiving-side rod-like portion supporting step of supporting at a position forming a path;
a pushing-side rod-shaped portion entering step of causing the tip of the pushing-side rod-shaped portion to enter the inside of the rod hole so that the O-ring is pushed by the tip of the pushing-side rod-shaped portion in the supported state of the receiving-side rod-shaped portion. An O-ring mounting method characterized by:
Further comprising an extension tool support step of supporting an extension tool having a through hole so that the through hole communicates with the one opening of the rod hole before the push-side rod-shaped portion entering step,
11. The O-ring mounting method of claim 10, wherein the preparing step further includes preparing the extension tool.

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