JP4935644B2 - Seal ring assembly device - Google Patents

Description

  The present invention is a seal made of a soft material such as rubber and having a circular cross section (O-ring) or an irregular shape different from a circular shape, for example, an X shape (X ring) or a square (square ring), and a circular shape. The present invention relates to a seal ring assembling apparatus for mounting a ring in a seal groove.

  The conventional O-ring assembling device (seal ring assembling device) of Patent Document 1 is formed with a tapered guide surface having a reduced diameter on the outer periphery of the tip, and an inversely tapered guide surface having a diameter increased from the tip of the tapered guide surface. A pin member that holds the O-ring in an extrapolated state on the constricted portion formed with a pin surface, and a pressing surface that is externally mounted on the pin member so as to be relatively movable in the axial direction and that pushes the O-ring held in the constricted portion of the pin member A guide member formed at the tip, the tip of the pin member is inserted into the concave hole of the workpiece, and the O-ring held in the constricted portion is pressed by the taper guide surface of the pin member and the pressing surface of the guide member. Then, the pin member is retreated in the axial direction while the O-ring is pushed in by the guide member, and the twist generated when the O-ring is inserted with the reverse tapered guide surface is removed. To.

  The O-ring assembling apparatus includes a drive mechanism that allows the pin member and the guide member to move relative to the support frame that supports the O-ring assembling apparatus. That is, the pin member is connected to the cylinder body of the drive mechanism, and the guide member is connected to the cylinder rod of the drive mechanism. The extension of the cylinder rod moves the guide member in the axial direction so that the O-ring contacts the concave hole of the workpiece. Then, by further extending the cylinder rod, the pressing surface of the guide member connected to the cylinder body comes into contact with the O-ring. Next, by moving the cylinder body in the direction opposite to the extension of the cylinder rod, the O-ring is detached from the pin member in a state where the O-ring is installed in the recessed hole of the workpiece.

Further, the O-ring assembling apparatus includes an O-ring automatic supply system that extrapolates the O-ring to the constricted portion of the pin member. This apparatus includes a transport body for aligning and transporting O-rings in a row, a pusher for taking out the O-ring from the transport body, a presser for accurately fitting the O-ring to the pusher, and extrapolating the O-ring to the constricted portion of the pin member. Therefore, a stage to which the O-ring is transferred from the pusher is further provided, and further includes an O-ring to the pusher, a drive mechanism for transferring the O-ring from the pusher, and a drive mechanism that moves to the stage.
JP 2000-161490 A

  However, according to Patent Document 1, when the O-ring is pressed between the taper guide surface of the pin member and the pressing surface of the guide member to insert the O-ring into the concave hole of the workpiece, the O-ring is a concave hole of the workpiece. The frictional force from the outer diameter side surface receives a rotational force along the outer periphery of the cross section of the O-ring and is twisted by this rotational force. Next, by moving the cylinder body in the direction opposite to the extension of the cylinder rod, the O-ring is detached from the pin member in a state where the O-ring is mounted in the concave hole of the workpiece. At this time, the O-ring is a reverse taper guide of the pin member. The frictional force from the surface receives the rotational force in the opposite direction along the outer periphery of the cross section of the O-ring. The roughness of the outer diameter side surface of the concave hole of the workpiece, which is a friction surface, and the reverse taper guide surface of the pin member are not necessarily the same, and the contact area between the outer diameter side surface of the concave hole and the O-ring is reversed. The contact area with the O-ring on the taper guide surface side is not the same. As a result, the rotational force at the time of insertion is not equal to the rotational force at the time of removal, and when the O-ring is detached from the pin member, the twist of the O-ring is not completely removed, and the twist remains. When the guide member that is in contact with the workpiece in the state is moved upward, the O-ring may be detached from the concave hole of the workpiece due to the remaining twist, and the O-ring assembly to the concave hole of the workpiece There is a problem with low reliability.

  Further, when the O-ring assembly device is assembled to the recessed hole of the workpiece, the O-ring assembly device accurately places the pressing surface of the guide member on the O-ring so that the central axis of the pressing surface of the guide member matches the central axis of the ring of the O-ring. Must abut against the ring. For this reason, the guide rod connected to the cylinder rod is inserted into the support frame, the lower portion of the inserted guide rod has a smaller diameter than the insertion hole of the support frame, and a clearance is provided, and the upper portion of the guide rod above the support frame. Has a larger diameter than the insertion hole, forms a tapered surface between the lower part and the upper part, and the tapered surface is lifted from the support frame, so that the central axis of the pressing surface of the guide member is the central axis of the ring of the O-ring The positioning by the clearance and the taper surface makes the positioning of the pressing surface of the guide member unstable and uncertain, so that the O-ring to the concave hole of the workpiece is made to conform to the contact surface of the O-ring. There is a problem that the reliability of the ring assembly is low.

  Further, the O-ring assembling apparatus includes an O-ring automatic supply system that extrapolates the O-ring to the constricted portion of the pin member, and this apparatus is a mechanically driven mechanism. There is a problem that the cost of the automatic ring supply system increases. There is also a problem that the installation location is limited.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is a seal ring that can be installed at an arbitrary position with a high reliability and a low cost for assembling the seal ring in the seal groove. It aims at providing an assembling apparatus.

  In order to solve the above problems, the invention described in claim 1 is a seal ring assembling device for assembling a soft material seal ring into a work seal groove, and introducing the seal ring pumped by gas. A pipe, a receiving pipe that intersects with the introducing pipe and into which the seal ring is introduced from the introducing pipe, an exhaust hole that discharges the gas flowing into the receiving pipe, and one end of the receiving pipe, and is in a closed state A shutter that restricts movement of the seal ring, a guide tube that is connected to the receiving pipe through the shutter, an inner diameter on the workpiece side is smaller than an inner diameter of the seal groove, and an eccentric protrusion is provided. Assembly means provided with a shaft that pushes the seal ring and an axial movement mechanism that moves in the axial direction while turning the shaft.

  In the invention according to claim 2, the turning angle of the shaft is 180 degrees or more.

  According to a third aspect of the present invention, the amount of eccentricity of the eccentric protrusion from the central axis of the shaft is larger than the width of the seal ring and smaller than half of the inner diameter of the seal ring.

  The invention according to claim 4 is provided with an exhaust passage on at least one of the inner peripheral surface of the receiving pipe on the shaft side and the shaft, and the gas flowing from the introducing pipe into the receiving pipe is Dividing into the shaft direction and the shutter direction, the gas in the shaft direction is discharged from the exhaust flow path, and the gas in the shutter direction is discharged from the discharge hole.

  In the invention described in claim 5, the flow rate of the gas discharged from the exhaust passage is larger than the flow rate of the gas discharged from the exhaust hole.

  According to the first aspect of the present invention, the tip of the guide tube of the seal ring assembling apparatus on the workpiece side (hereinafter, the guide tube tip) is connected to the seal groove of the workpiece. Next, the shutter is closed, the flow passage opening where the introduction pipe and the reception pipe intersect is fully opened, and the seal ring is placed on the shutter side of the introduction pipe through the flow of gas flowing from the introduction pipe through the reception pipe to the exhaust hole. Then, the gas supply is stopped. Next, the shutter is opened, the receiving pipe is connected to the guide pipe, and the shaft can move to the guide pipe.

  The seal ring conveyed to the shutter side of the introduction pipe has a posture in which the seal ring can be assembled to the seal groove of the workpiece by making the upper surface of the shutter parallel to the bottom surface of the seal groove in advance. Is seated on the shutter surface in a posture that is approximately parallel to the shutter (hereinafter referred to as an appropriate assembly posture), but is in an inappropriate posture for mounting in the seal groove (hereinafter referred to as an inappropriate assembly posture). May stay in That is, the shutter temporarily restricts the pumped seal ring from being conveyed to the guide tube.

  The seal ring that remains on the shutter side in an inappropriate posture is the axial direction in which the shaft moves to a predetermined position after the shutter is fully opened and then the assembly unit operates, and then moves in the axial direction while turning. From the moving mechanism, the eccentric protrusion of the shaft turns around the center axis of the shaft, hits the seal ring, and further the eccentric protrusion enters the inner diameter side of the seal ring, and the seal ring is rotated by the eccentric protrusion. The assembly posture is corrected. Next, the shaft is moved in the axial direction by the axial movement of the assembling means, and the seal ring is pushed while maintaining the proper assembling posture at the end surface of the shaft, and the guide tube is moved to the workpiece side in the proper assembling posture. Attach to.

  On the other hand, the seal ring seated on the shutter surface in the proper assembly posture is pushed from the end surface of the shaft by the axial movement of the assembly means including turning and is guided from the receiving pipe while maintaining the proper assembly posture. Mounted on the workpiece side of the tube.

  Since the work diameter of the guide tube is smaller than the outer diameter of the seal ring, the seal ring mounted on the work side of the guide pipe receives the holding pressure from the inner peripheral surface of the guide hole and holds it in the proper assembly posture. Is done. Since the inner diameter of the guide tube on the workpiece side is smaller than the inner diameter of the side surface of the seal groove with which the outer periphery of the seal ring abuts, the inner diameter of the guide tube tip is positioned inside the seal groove side surface, and the inner periphery of the guide tube tip is By connecting to the seal groove of the workpiece, the seal ring on the workpiece side of the guide tube is pushed by the end surface of the shaft by the assembling means, is detached from the tip of the guide tube, and moves to the seal groove. At this time, the seal ring is released from the holding pressure on the inner peripheral surface on the distal end side of the guide tube, and is assembled with a predetermined outer diameter shimoshiro in the seal groove.

  As described above, the seal ring is assembled with a predetermined outer diameter squeegee in the seal groove of the workpiece, and the inner diameter of the inner peripheral surface of the guide tube tip only needs to be dimensioned so that the seal ring does not fall naturally. Assembling troubles due to twisting around the seal ring cross section of the guide tube do not occur, and the inner diameter of the guide tube tip is positioned inside the side surface of the seal groove, and the inner periphery of the guide tube tip is connected to the seal groove of the workpiece. Assembling problems due to uncertain positioning of the pressing surface in the case do not occur, and the reliability of assembling the seal ring is improved.

  The seal ring is supplied to the seal ring assembling apparatus by supplying a gas having a pressure higher than the atmosphere (hereinafter referred to as gas), for example, air, to the hose, feeding the seal ring through the hose, and sealing the seal ring. Since the mounting of the seal ring on the workpiece side of the guide tube performed in the pre-assembly process in the groove is performed by an assembling means, a mechanical O-ring that extrapolates the conventional O-ring to the constricted portion of the pin member is performed. A device for automatically supplying a ring is not required, and an automatic seal ring supplying system can be installed at an arbitrary position, and a low cost seal ring assembling device can be provided.

  In the invention according to claim 2, the turning angle about the central axis of the shaft is 180 degrees or more at an angle at which the shaft turns in the shutter direction from the position of the outer diameter dimension of the seal ring from the upper surface of the shutter. Therefore, the eccentric protrusion pivots in the shutter direction by 180 degrees or more about the central axis. Therefore, if there is a seal ring with an improper assembly posture, the eccentric protrusion hits the seal ring while the shaft rotates 180 degrees and further enters the inner diameter side of the seal ring, and the seal ring is rotated by the eccentric protrusion. The seal ring is corrected to an appropriate assembly posture until the turn is completed. As a result, the reliability of the seal ring assembling apparatus is improved.

  In the invention according to claim 3, since the eccentricity of the eccentric protrusion from the central axis of the shaft is larger than the width of the seal ring and smaller than half of the inner diameter of the seal ring, the eccentric protrusion moves around the central axis. The seal ring can enter the inner diameter side of the improper assembly posture while turning, and the seal ring of the improper assembly posture is rotated between the eccentric protrusion and the end face of the shaft to correct the proper assembly posture. To do. As a result, the reliability of the seal ring assembling apparatus is improved.

  In the invention according to claim 4, the gas flowing into the introduction pipe is branched into the exhaust hole and the exhaust passage, and the gas discharged from the exhaust passage flows in the direction in which the shaft is inserted and flows to the atmosphere. To be discharged. When the seal ring is pumped from the inlet pipe to the receiving pipe, the gas flowing in the exhaust passage prevents the seal ring from moving toward the shutter while standing substantially perpendicular to the upper surface of the shutter, and lifts the top of the seal ring. Move it diagonally so that the top of the seal ring hits the inner wall of the receiving tube. The gas that has flowed into the exhaust hole is sprayed toward the shutter with the seal ring lifted at the head, and the seal ring is seated on the upper surface of the shutter in an appropriate assembly posture.

  Further, in the invention according to claim 5, since the flow rate of the gas discharged from the exhaust passage is larger than the flow rate discharged from the exhaust hole, when the seal ring is pumped from the introduction pipe to the receiving pipe, The gas flowing through the path causes the seal ring to be parallel to the upper surface of the shutter. The seal ring in the parallel posture is blown in the shutter direction by the gas flowing through the exhaust hole and is seated on the upper surface of the shutter in an appropriate assembly posture.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a sectional view of a seal ring assembling apparatus according to an embodiment of the present invention. The seal ring assembling apparatus 1 includes a pressure feeding unit 10, a mechanical drive unit 30, a guide tube 50, and a shutter unit 20. The seal ring 2 in the drawing indicates a state in the middle of conveyance, and an arrow B is illustrated. The flow of the air (gas) supplied from the air supply source (supply source) which is not.

  The pumping unit 10 includes a block 11 and a pipe 12. The block 11 is provided with a receiving pipe 14 and an introduction pipe 13 obliquely intersecting the receiving pipe 14, and the introduction pipe 13 includes a pipe 12. A hose 3 that supplies the seal ring 2 to the introduction pipe 13 is connected to the pipe 12, and the flow path diameter of the introduction pipe 13 is larger than the outer diameter D of the seal ring 2.

  A shutter 21 for opening and closing the receiving tube 14 is provided on the lower surface of the block 11, and a shaft 31 is slidably inscribed in the receiving tube 14 on the upper surface side of the block 11 with a minute gap. The receiving pipe 14 between the lower surface 31 c (end surface) of the shaft 31 and the shutter 21 forms a receiving chamber 15 for receiving the seal ring 2.

  In addition, an opening / closing mechanism 22 is connected to the shutter 21 to form the shutter unit 20, and the shutter 21 is opened / closed by air pressure.

  The mechanical drive unit 30 is provided with a shaft 31 including a cam follower 33, a drive device 34 having a rod 34a coupled to the shaft 31, a support base 35 for fixing the drive device 34, and a cam groove 37 that the cam follower 33 follows. And a cam guide 38.

  The upper end side of the shaft 31 is screwed to the rod 34a as described above, and an adhesive is applied to the screw coupling portion to prevent loosening. A cam follower 33 is fixed to the shaft 31 with a bolt 33a perpendicular to the central axis Y of the shaft 31. A substantially conical eccentric protrusion 32 is provided on the lower surface 31 c of the shaft 31. The eccentric protrusion 32 is positioned outside the cylinder having the center axis Y of the shaft 31 as the axis and having the width W of the seal ring 2 as a radius and inside the cylinder having the inner diameter (diameter) d of the seal ring 2 as a diameter. .

  The drive device 34 includes a rod 34a, a cylinder 34b, and a piston (not shown) connected to the rod 34a. The rod 34a reciprocates in the axial direction due to air pressure, and is centered on the central axis Y of the shaft 31. It is arranged to be able to rotate. Therefore, the rod 34a and the shaft 31 can rotate together.

  FIG. 2 is a view of the block 11 in FIG. A groove 11b (FIG. 2) is provided on the lower surface of the block 11, and an exhaust hole 11a is formed by the groove 11b and the shutter upper surface 21a to release air having a higher pressure than the air flowing into the receiving chamber 15 (hereinafter referred to as air). Is done. The lower surface 31 c of the shaft 31 is provided with a flow path 31 b (exhaust flow path) through which the air flowing into the introduction pipe 13 is branched and discharged to the atmosphere. The flow path 31 b is the inner peripheral surface of the receiving pipe 14 of the block 11. A flow path 11c provided above is connected to the flow path hole 11d, and the flow path 31b, the flow path 11c, and the flow path hole 11d form a bypass flow path 31a. The minimum channel cross section of the bypass channel 31a is set to about twice the minimum channel cross sectional area of the exhaust hole 11a. The minute gap between the inner peripheral surface of the receiving pipe 14 and the outer peripheral surface of the shaft 31 fulfills a clearance sealing function that seals air against the atmosphere.

  Alternatively, air may be supplied to the flow path port 11e of the bypass flow path 31a, and the bypass flow path 31a may be a blowing flow path 31d that blows air from the flow path 31b to the seal ring 2 in the receiving chamber 15. The spray channel 31d may be provided on the shaft 31 separately from the bypass channel 31a.

  Further, the air circuit 45 may be provided in the flow path port 11e by being surrounded by an alternate long and short dash line in the drawing. In the air circuit 45, one end of the exhaust valve 46 and one end of the supply valve 47 are both connected to the flow path port 11e, the other end of the exhaust valve 46 is opened to the atmosphere, and the other end of the supply valve 47 is the air supply source (see FIG. (Not shown). By switching the exhaust valve 46 and the supply valve 47, the bypass passage 31a can be used as both an exhaust passage and an air supply blowing passage. The minimum flow path cross section of the exhaust valve 46 is preferably about 20 times or more the minimum flow path cross sectional area of the exhaust hole 11a.

  Next, the configuration of the assembling means will be described. The cam guide 38 includes a flange 38b at the lower end of the cylinder 38a. The flange 38 b keeps the cam guide 38 and the shaft 31 coaxial, is sandwiched between the upper surface of the block 11 and the lower surface of the support base 35, and is fixed to the block 11 together with the support base 35 with a plurality of bolts 4.

  A cam groove 37 in which the cam follower 33 is inscribed is provided in the cylinder 38a of the cam guide 38, and the cam groove 37 is arranged in order from the upper side to the lower side of the cylinder 38a, the linear groove 37ab, the spiral groove 37bc, and the linear groove. It is connected to 37cd. The shaft 31 moves in the vertical direction (hereinafter referred to as the axial direction) of the central axis Y, with the cam follower 33 following the cam groove 37. That is, when the rod 34a moves from the upper side to the lower side, the shaft 31 moves (linear movement of the movement amount L1 following the linear groove 37ab, rotation of the movement amount L2 following the spiral groove 37bc, straight line of the movement amount L3 following the linear groove 37cd. When the rod 34a moves upward from below, moving in the axial direction approaching the shutter 21 direction, the linear movement of the movement amount L3 following the linear groove 37cd, the movement amount L2 following the spiral groove 37bc, the turning, the linear groove 37ab The movement in the axial direction away from the shutter 21 is performed as a linear movement of the movement amount L1 following the above.

  The position of the upper end 37a of the linear groove 37ab is such that the shaft 31 moves away from the receiving pipe 14 when the shaft 31 moves upward, and the flow path of the introducing pipe 13 when the shaft 31 is supplied with air (the crossing of the introducing pipe 13 and the receiving pipe 14). Any position may be used as long as the condition for fully opening the flow path) can be secured.

  The position of the lower end 37d of the linear groove 37cd is such that the seal ring 2 mounted on the tip 52 (hereinafter referred to as guide hole tip 52) side of the guide hole 51 of the guide tube 50 moves downward as the shaft 31 moves downward. What is necessary is just to ensure the conditions which can be attached to 5a. That is, it is only necessary that the distance between the lower surface 31c of the shaft 31 and the bottom surface 5c of the seal groove 5a at the time when the assembly is completed can be equal to or higher than the height H of the seal ring 2.

  The rotation angle of the spiral groove 37c is not limited as long as it can be rotated 180 degrees or more at an angle turning in the direction of the shutter 21 from the position of the outer diameter D of the seal ring 2 from the shutter upper surface 21a where the end surface 31c of the shaft 31 is closed. In the embodiment of FIG. 1, the turning angle is set to 180 degrees, and the linear movement amount L2 of the turning is set to a distance from the seal ring 2 to the guide hole tip 52.

  Further, the amount of movement in the direction of the shutter 21 from the position of the outer diameter dimension D of the seal ring 2 from the shutter upper surface 21a where the end surface 31c of the shaft 31 is closed may be equal to or larger than the outer diameter D of the seal ring.

  Further, if the rotation angle and the movement distance of the spiral groove 37bc can be ensured, the shaft 31 can move only in the direction of the axial movement between the upper end 37a of the cam groove 37 and the lower end 37d of the cam groove 37, or turn. A combination of movement and linear movement may be used.

  The assembling means 40 includes an axial direction moving mechanism 44 including at least a turning mechanism 42 by a cam follower 33 and a spiral groove 37bc. That is, the assembling means 40 includes at least the turning mechanism 42 among the turning mechanism 42, the linear moving mechanism 41 using the cam follower 33 and the linear groove 37ab, and the linear moving mechanism 43 using the cam follower 33 and the linear groove 37cd. The axial movement mechanism 44 may be any mechanism that moves the shaft 31 on the central axis Y, and may be a turning mechanism 42, linear movement mechanisms 41 and 43, or a mechanism that moves in another axial direction.

  The guide tube 50 is fixed to the lower surface of the block 11 with a bolt 6, and a groove that allows the shutter 21 to open and close is provided on the upper surface of the guide tube 50. The guide tube 50 is provided with a guide hole 51 coaxially communicating with the receiving tube 14 when the shutter 21 is open.

  The guide hole 51 is formed by sequentially connecting an introduction part 51a, a transition part 51b, and a guide part 51c on the shutter 21 side. The inner diameter of the introduction part 51 a is slightly larger than the inner diameter of the receiving pipe 14 and the outer diameter D of the seal ring 2. The inner diameter of the connecting position of the transition part 51b and the guide part 51c is smaller than the inner diameter of the introduction part 51a, larger than the inner diameter on the guide hole tip 52 side, and preferably slightly smaller than the outer diameter D of the seal ring 2. That is, it is preferable that the guide portion 51c has a tapered shape with a reduced diameter such that the inner diameter of the guide hole tip 52 side is slightly smaller toward at least the guide hole tip 52 side. Further, the guide portion 51 c may have a straight shape slightly smaller than the outer diameter D of the seal ring 2. The transition part 51b is narrowed so as to smoothly transition from the introduction part 51a to the guide part 51c.

  In the present embodiment, the guide hole 51 is formed from the introduction part 51a, the transition part 51b, and the guide part 51c, but is not limited to this formation. For example, the introduction part 51a and the transition part 51b are not provided in the guide hole 51, the guide hole 51 forms a tapered guide part 51c, and the inlet inner diameter of the guide hole 51 on the shutter 21 side is the inner diameter of the receiving pipe 14, The guide ring tip 52 has an inner diameter slightly smaller than the outer diameter D of the seal ring 2 and slightly smaller than the outer diameter D of the seal ring 2.

  The inner diameter on the guide hole tip 52 side is smaller than the outer diameter D of the seal ring 2 and smaller than the inner diameter of the side surface 5b (hereinafter referred to as seal groove side surface 5b) of the seal groove 5a with which the outer periphery of the seal ring 2 abuts.

  The relationship between the seal ring assembling apparatus 1 and the work 5 is that the work 5 is arranged at a predetermined position of the gantry 7, the seal ring assembling apparatus 1 is moved, and the guide hole tip of the guide tube 50 of the seal ring assembling apparatus 1. The end surface of 52 abuts on the upper surface of the workpiece 5 and is disposed inside the seal groove side surface 5b, and the guide portion 51c is connected to the seal groove 5a.

  When the eccentric protrusion 32 hits the bottom surface 5c of the seal groove 5a of the workpiece 5, a structure in which the eccentric protrusion 62 is pulled into the shaft 61 against the force of the spring 63 as shown in FIG. .

  In FIG. 1, the guide tube 50 is provided on the lower surface of the block 11, but the lower surface side of the block 11 may be extended to form the guide tube 50, and the guide hole 51 may be provided.

  Next, the operation and effect of the embodiment of FIG. 1 will be described.

(When the seal ring is seated on the upper surface of the shutter with the proper assembly posture)
FIG. 4 shows a series of steps for assembling the seal ring when seated on the upper surface of the shutter in an appropriate assembling posture. Each process is as follows.

  (Step 1): The seal assembling ring assembling apparatus 1 moves to a predetermined position of the workpiece 5. The lower surface 31c of the shaft 31 is located at a position where the introduction pipe 13 is fully opened, and the shutter 21 is in a closed state.

  (Step 2): Air is supplied from the hose 3. Due to the flow of air (introducing pipe 13, receiving chamber 15, exhaust hole 11 a, atmosphere), the seal ring 2 that has been pumped to the receiving chamber 15 through the introducing pipe 13 is converted into air that is discharged to the atmosphere. It is sprayed, moves as indicated by a thin line, and is seated (regulated) on the shutter upper surface 21a with an appropriate assembly posture.

  (Step 3): Air supply from the hose 3 (FIG. 1) is stopped, and the shutter 21 is opened. The seal ring 2 maintains the state of step 2 in the receiving chamber 15.

  (Step 4): The shaft 31 linearly moves the distance L1 downward by the linear movement mechanism 41 (FIG. 1) following the linear groove 37ab of the assembling means 40. The seal ring 2 maintains the state of step 3 in the receiving chamber 15.

  (Step 5): The shaft 31 turns downward by the turning mechanism 42 (FIG. 1) of the assembling means 40, the lower surface 31c of the shaft 31 hits the seal ring 2, and the shaft 31 continues to attach the seal ring 2 to the proper assembly. Pushing while maintaining the attached posture, turning 180 degrees and moving downward by a distance L2, the seal ring 2 reaches the guide hole tip 52 in an appropriate assembled posture (seal ring 2 shown by a solid line). At this time, the seal ring 2 receives a slight pressing pressure from the inner peripheral surface of the guide tube 50 on the guide hole tip 52 side.

  (Step 6): By the linear movement mechanism 43 (FIG. 1) following the linear groove 37cd of the assembling means 40, the shaft 31 moves linearly by a distance L3, and the seal ring 2 is moved from the inner peripheral surface on the guide hole tip 52 side. Detach. At this time, the presser pressure from the inner peripheral surface on the guide hole tip 52 side is released, and the seal ring 2 is assembled to the seal groove 5a with a predetermined level.

  (Step 7): The shaft 31 is moved by the assembling means 40 (upward linear movement by the linear movement mechanism 43, upward turning movement by the turning mechanism 42, upward linear movement by the linear movement mechanism 41). Are sequentially performed, and then the shutter 21 is closed, the process returns to the state of step 1 and the assembly of the seal ring 2 to the seal groove 5a is completed.

  In addition, the seal ring 2 shown with the thin line of FIG. 4 shows the state in the middle of each process.

(If the seal ring is in an inappropriate assembly position in the receiving room: Case 1)
FIG. 5 shows a series of steps for assembling the seal ring when the seal ring 2 is pumped to the receiving chamber 15 in an inappropriate assembly posture. The behavior of the seal ring 2 in Step 1, Step 6, and Step 7 in FIG. 5 is the same as that in Step 1, Step 6, and Step 7 in FIG. The behavior of the seal ring 2 from step 2 to step 5 in FIG. 5 is as follows.

  (Step 2): Air is supplied from the hose 3. The seal ring 2 is pumped to the receiving chamber 15 through the introducing tube 13 by the air flow (introducing tube 13, receiving chamber 15, exhaust hole 11a, atmosphere). It is not seated, behaves as indicated by a thin line, for example, and stays in a posture perpendicular to the shutter upper surface 21a on the central axis Y of the shaft 31 (regulation).

  (Step 3): Air supply from the hose 3 is stopped, and the shutter 21 is opened. The seal ring 2 maintains the state of step 2 in the receiving chamber 15.

  (Step 4): The shaft 31 linearly moves the distance L1 downward by the linear movement mechanism 41 (FIG. 1) following the linear groove 37ab of the assembling means 40. At this time, the lower surface 31 c of the shaft 31 is in contact with the outer periphery of the seal ring 2, and the seal ring 2 maintains the state of step 3 in the receiving chamber 15.

  (Step 5): When the shaft 31 pivots downward by the pivot mechanism 42 (FIG. 1) following the spiral groove 37bc of the assembling means 40, the eccentric protrusion 32 hits the side surface of the seal ring 2, and the central axis Y is It turns as an axis, enters the inner diameter side of the seal ring 2, and the seal ring 2 is rotated by the eccentric protrusion 32 and the lower surface 31c of the shaft 31 while moving as indicated by a thin line, gradually to an appropriate assembly posture. And the turning movement distance L2 moves downward to reach the guide hole tip 52 in a proper assembly posture (seal ring 2 shown by a solid line). At this time, the seal ring 2 receives a slight pressing pressure from the inner peripheral surface of the guide hole 51 c of the guide tube 50. The thin line in FIG. 4 shows a state in the middle of each process.

  In the above description, the shutter 21 is opened before the movement by the linear movement mechanism 41 following the linear groove 37ab of the assembling means 40 is started. However, when the structure of the eccentric protrusion 32 is shown in FIG. The shutter 21 may be fully opened before the eccentric protrusion 32 hits the shutter upper surface 21a. When the structure of the eccentric protrusion 32 is shown in FIG. 3, the shaft 31 has a seal ring height H higher than the shutter upper surface. The shutter 21 may be fully opened before reaching the position.

(If the seal ring is in an inappropriate assembly position in the receiving room: Case 2)
The case 2 is attached at a position where the eccentric protrusion 32 is shifted by 90 degrees with respect to the eccentric protrusion 32 of the case 1. Therefore, in the process 2 of the case 1 described above, the outer diameter line of the seal ring 2 comes to the axis X (FIG. 6) of the eccentric protrusion 32. In Case 2, the behavior of the seal ring 2 in Step 4 and the posture of the seal ring 2 at the start of Step 5 are different from those in Case 1. The other steps are the same as in case 1. FIG. 6 is an explanatory diagram of step 3 and step 4 of case 2. In the drawing, the shaft 31 and the seal ring 2 in step 3, step 4-1, and step 4-1a show the outer shape, not the cross section.

  (Step 3): Air supply from the hose 3 is stopped, and the shutter 21 is opened. The seal ring 2 maintains the state of step 2 in the receiving chamber 15 (attitude perpendicular to the shutter upper surface 21a on the central axis Y of the shaft 31).

  (Step 4): (Step 4-1) in FIG. 6 shows a state in which the shaft 31 is linearly moved downward by the linear movement mechanism 41 and the distal end side of the eccentric protrusion 32 is in contact with the outer diameter line of the seal ring 2. . The illustrated (Step 4-1a) is a cross-sectional view taken along the line MM of (Step 4-1) in FIG.

(Step 4-2) shows a state in which the shaft 31 is further linearly moved downward. That is, when the shaft 31 moves downward from the contact position, the contact is displaced from the outer diameter line of the seal ring 2, and the vertical posture of the seal ring 2 starts to be inclined, and this inclination is caused by the shaft 31 moving downward. Grows as you move on.

(Step 4-3) shows a state in which the shaft 31 has moved linearly by the distance L1 downward, and the linear movement following the linear groove 37ab has been completed. At this point, the inclination further increases, and the eccentric protrusion 32 enters the inner diameter of the seal ring 2. This point in time is a starting point of downward turning by the turning mechanism 42, and the state of the seal ring 2 at this point corresponds to the state of the seal ring 2 in the middle of the process 5 of the case 1. The subsequent steps are the same as in the case 1, and the seal ring 2 is assembled in the seal groove 5a with a predetermined diameter.

  In this embodiment, in the supply and assembly of the seal ring 2, the description is made with the seal ring 2 standing, which is the most inferior posture, but is not limited thereto. For example, the same effect can be obtained even in a posture in which the seal ring 2 falls on the inner peripheral wall of the receiving chamber 15.

(Operation of guide hole and seal ring in step 5 and step 6)
The inner diameter of the introduction portion 51a of the guide hole 51 is slightly larger than the inner diameter of the receiving pipe 14 and the inner diameter of the seal ring 2, and the guide hole 51 and the receiving pipe 14 are in a coaxial relationship. It moves smoothly to the introduction part 51a. Further, since the transition part 51b smoothly connects the introduction part 51a and the guide part 51c, the seal ring 2 smoothly moves from the introduction part 51a to the guide part 51c.

  The guide portion 51c is tapered such that the inner diameter slightly decreases toward the guide hole tip 52. The inclination of the guide portion 51c is so small that the seal ring 2 does not fall naturally. The inner diameter of the guide portion 51c is that of the seal ring 2. While the seal ring 2 is slightly smaller than the outer diameter and the seal ring 2 is moving along the guide portion 51c, the seal ring 2 receives only a slight pressing pressure from the inner peripheral surface of the guide portion 51c, so that it hardly twists around the seal ring cross section. .

  Since the inner diameter of the guide hole tip 52 is smaller than the outer diameter D of the seal ring 2, the seal ring 2 reaching the guide hole tip 52 receives the pressing pressure from the inner peripheral surface of the guide portion 51c of the guide hole tip 52, Attaching posture can be maintained. The inner diameter of the guide hole tip 52 is smaller than the inner diameter of the side surface 5b of the seal groove 5a with which the outer periphery of the seal ring 2 contacts, and the inner diameter of the guide hole tip 52 is positioned inside the seal groove side surface 5b. The seal ring assembling apparatus 1 moves so as to be connected to the seal groove 5 a of the workpiece 5. Accordingly, the seal ring 2 at the guide hole tip 52 is detached from the guide hole tip 52 by the axial movement of the shaft 31 by the linear moving mechanism 43 of the assembling means 40 and moves to the seal groove 5a. At this time, the pressing pressure is released, and the seal ring 2 is assembled to the seal groove 5a with a predetermined outer diameter shimoshiro.

  From the above, the seal ring 2 is mounted on the guide hole tip 52 in an appropriate assembly posture by the assembly means 40, and from there, the seal groove 5a is assembled with a predetermined outer diameter shimishiro, which occurs in the prior art. Assembling troubles due to twisting around the seal ring cross section and assembling troubles due to uncertain positioning of the pressing surface do not occur, the reliability of the seal ring assembly 1 is improved, and the highly reliable seal ring assembling apparatus 1 Can provide.

  Further, the supply of the seal ring 2 to the seal ring assembling apparatus 1 is carried out by pressure feeding the seal ring 2 through the hose 3 with air and a guide carried out in a step before assembling the seal ring 2 into the seal groove 5a. Since the mounting of the seal ring 2 on the hole tip 52 side is performed by the assembling means 40, a mechanical O-ring automatic supply system device for extrapolating the conventional O-ring to the constricted portion of the pin member becomes unnecessary. An automatic supply system (not shown) for the seal ring 2 can be installed at an arbitrary position, and a low-cost seal ring assembling apparatus 1 can be provided.

  The rotation angle of the turning mechanism 17 about the central axis Y of the shaft 31 is 180 degrees or more when the shaft 31 turns in the direction of the shutter 21 based on the position of the outer diameter dimension D of the seal ring 2 from the shutter upper surface 21a. Therefore, the eccentric protrusion 32 also turns 180 degrees or more around the central axis Y. Accordingly, if there is a seal ring 2 in an inappropriate assembly posture, the eccentric protrusion 32 hits the seal ring 2 and further enters the inner diameter side of the seal ring 2 while the shaft 31 rotates at least 180 degrees. The seal ring 2 is rotated by the protrusion 32 to be corrected to an appropriate assembly posture, and the shaft 31 is continuously moved downward by the axial movement mechanism 44 and attached to the inner diameter of the guide hole tip 52 in an appropriate assembly posture. . As a result, the reliability of the seal ring assembling apparatus 1 is improved.

  Even if the turning angle of the turning mechanism 42 is smaller than 180, the seal ring 2 can be corrected to an appropriate assembly posture by adjusting various conditions. For example, if the length of the eccentric protrusion 32 is half of the outer diameter D of the seal ring, the turning angle may be 90 degrees or more. Further, if the eccentric protrusion 32 is newly provided at a position rotated 90 degrees around the central axis Y from the eccentric protrusion 32, the turning angle may be 90 degrees or more.

  Further, since the eccentric amount of the eccentric protrusion 32 from the central axis Y of the shaft 31 is larger than the width W of the seal ring and smaller than half of the inner diameter of the seal ring inner diameter d (diameter), the eccentric protrusion 32 has the central axis Y. It is possible to enter the inner diameter side of the seal ring 2 in an improper assembly posture while turning around and rotate the seal ring 2 in an improper assembly posture between the eccentric protrusion 32 and the end surface of the shaft 31, Correct the assembly posture. As a result, the reliability of the seal ring assembling apparatus 1 is improved. In other words, the eccentric protrusion 32 is positioned outside the cylinder having the central axis Y of the shaft 31 as an axis and the width W of the seal ring 2 as a radius, and the inside diameter (diameter) of the seal ring 2 is positioned inside the cylinder. .

  FIG. 7 is an explanatory diagram for discharging air from the bypass channel 31a. The air flowing into the introduction pipe 13 is branched into the exhaust hole 11a (FIG. 1) and the bypass channel 31a, and the air discharged from the bypass channel 31a flows in the direction (upward direction) in which the shaft 31 is inserted. . When the seal ring 2 is pumped from the introduction pipe 13 to the receiving chamber 15, the air indicated by the arrow C flowing in the bypass flow path 31 a prevents the head 2 a of the seal ring 2 from being directly below, and has an appropriate assembly posture. The leading end 2a of the seal ring 2 moving so as to be secured is lifted and dropped obliquely, and the leading end 2a of the seal ring is brought into contact with the inner wall of the receiving pipe 14. Then, the air indicated by the arrow D discharged to the exhaust hole 11a is blown toward the seal ring 2 in the direction of the shutter 21, and the seal ring 2 is seated on the shutter upper surface 21a in an appropriate assembly posture. As a result, the reliability of the seal ring assembling apparatus 1 is improved.

  Since the minimum flow path area of the bypass flow path 31a is about twice as large as the minimum flow path area of the exhaust hole 11a, the flow rate of the gas discharged from the bypass flow path 31a is larger than the flow rate discharged from the exhaust hole 11a, When the seal ring 2 is pumped from the introduction pipe 13 to the receiving chamber 15, the seal ring 2 is brought into a proper assembly posture, that is, a parallel posture with respect to the bottom surface 5c of the seal groove 5a by the air flowing through the bypass flow path 31a. The seal ring 2 in the parallel posture is blown in the direction of the shutter 21 parallel to the seal groove bottom surface 5c by the air flowing through the exhaust hole 11a and is seated on the shutter upper surface 21a in an appropriate assembly posture. As a result, the reliability of the seal ring assembling apparatus 1 is improved.

  FIG. 8 is an explanatory diagram for blowing air from the blowing passage 31d to the seal ring 2. As shown in FIG.

Further, air is supplied from an air supply source (not shown) to the flow path port 11e (FIG. 1) of the bypass flow path 31a, and the bypass flow path 31a is used as the blowing flow path 31d. By providing the exhaust passage 11a on the shutter 21 side, when air is supplied to the passage 11e (FIG. 1), the bypass passage 31a (the passage 11d, the passage 11c, the passage 11b), which is the blowing passage 31d, is provided. From the flow path 11b of the shaft 31, the air indicated by the arrow E is ejected straight toward the shutter 21 and is blown to the seal ring 2 of the receiving chamber 15 and discharged from the exhaust hole 11a (FIG. 1). 2 is seated on the shutter upper surface 21a in an appropriate assembly posture. As a result, the reliability of the seal ring assembling apparatus 1 is improved.

  Further, the air circuit 45 is connected to the flow path port 11e of the bypass flow path 31a. The supply valve 47 is closed, the exhaust valve 46 is opened, the air flowing into the receiving chamber 15 is discharged to the atmosphere, and the bypass flow path 31a is used as the exhaust flow path. Thereafter, the exhaust valve 46 is closed, the supply valve 47 is opened, air is supplied to the flow path port 11e of the ipass flow path 31a, and the air is blown straight out from the flow path 11b of the shaft 31 in the direction of the shutter 21, thereby bypassing the flow path. 31a is used as the spray channel 31d. As a result, the reliability of the seal ring assembling apparatus 1 is improved.

  In the process in which the seal ring 2 is conveyed from the receiving chamber 15 to the guide hole tip 52 of the guide tube 50, the outer peripheral side of the seal ring 2 gradually receives pressure from the inner peripheral surface of the guide hole 51. 51 is a taper shape with a diameter reduced at least on the guide hole tip 52 side, and the taper need only be such that the seal ring 2 does not fall naturally, so this pressing pressure is slight and almost no twisting occurs around the seal ring cross section. It is transported smoothly without being attached, and is attached to the guide hole tip 52 in an appropriate assembly posture. As a result, the reliability of the seal ring assembling apparatus 1 is improved.

It is sectional drawing of the seal ring assembly | attachment apparatus concerning embodiment of this invention. It is an A arrow view of the block of FIG. It is sectional drawing of the eccentric protrusion concerning other embodiment of this invention. It is explanatory drawing of the seal ring assembly | attachment process (in the case of a proper posture) of FIG. It is explanatory drawing of the seal ring assembly | attachment process (in the case of an improper attitude | position) of FIG. It is explanatory drawing of the seal ring assembly | attachment process (in the case of another improper attitude | position) of FIG. It is explanatory drawing of an effect | action of a bypass flow path. It is explanatory drawing of an effect | action of a spraying flow path.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seal ring assembly apparatus 2 Seal ring 5 Work 5a Seal groove 11a Exhaust hole 13 Introducing pipe 14 Receiving pipe 21 Shutter 31, 61 Shaft 31b Exhaust flow path 32, 62 Eccentric protrusion 40 Assembling means 44 Axial moving mechanism 50 Guide Tube Y center axis

Claims (5)

A seal ring assembling device for assembling a soft material seal ring into a work seal groove,
An introduction pipe for introducing the seal ring pumped by gas;
A receiving pipe that intersects with the introduction pipe and into which the seal ring is introduced from the introduction pipe;
An exhaust hole for discharging the gas flowing into the receiving pipe;
A shutter that is provided at one end of the receiving pipe and restricts movement of the seal ring in a closed state;
A guide pipe connected to the receiving pipe through the shutter, and an inner diameter of the work side smaller than an inner diameter of the seal groove;
A shaft provided with an eccentric protrusion to push the seal ring of the receiving chamber;
An axial direction moving mechanism that moves in the axial direction while turning the shaft. The seal ring assembling apparatus according to claim 1, wherein a turning angle of the shaft is 180 degrees or more. The amount of eccentricity of the eccentric protrusion from the central axis of the shaft is larger than the width of the seal ring and smaller than half of the inner diameter of the seal ring. The seal ring assembling apparatus described in 1. The exhaust pipe is provided in at least one of the inner peripheral surface of the receiving pipe on the shaft side and the shaft, and the gas flowing into the receiving pipe from the introduction pipe is separated into the shaft direction and the shutter direction, 4. The seal according to claim 1, wherein the gas in the shaft direction is discharged from the exhaust flow path, and the gas in the shutter direction is discharged from the discharge hole. Ring assembly device. The seal ring assembling apparatus according to claim 4, wherein a flow rate of the gas discharged from the exhaust passage is larger than a flow rate of the gas discharged from the exhaust hole.

Images