WO2016098188A1 - Mechanical lash adjuster and method for manufacturing mechanical lash adjuster - Google Patents

Mechanical lash adjuster and method for manufacturing mechanical lash adjuster Download PDF

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Publication number
WO2016098188A1
WO2016098188A1 PCT/JP2014/083340 JP2014083340W WO2016098188A1 WO 2016098188 A1 WO2016098188 A1 WO 2016098188A1 JP 2014083340 W JP2014083340 W JP 2014083340W WO 2016098188 A1 WO2016098188 A1 WO 2016098188A1
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WO
WIPO (PCT)
Prior art keywords
plunger
lash adjuster
peripheral surface
jig
mechanical lash
Prior art date
Application number
PCT/JP2014/083340
Other languages
French (fr)
Japanese (ja)
Inventor
貴俊 木森
美千広 亀田
Original Assignee
日鍛バルブ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日鍛バルブ株式会社 filed Critical 日鍛バルブ株式会社
Priority to PCT/JP2014/083340 priority Critical patent/WO2016098188A1/en
Publication of WO2016098188A1 publication Critical patent/WO2016098188A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups

Definitions

  • the present invention relates to a mechanical lash adjuster and a method for manufacturing the mechanical lash adjuster.
  • a rocker arm uses a lash adjuster as a fulcrum between a cam fixed to a camshaft that is driven to rotate in synchronization with the rotation of the engine and a valve stem of an intake valve (or an exhaust valve).
  • the driving force from the camshaft is transmitted to the valve stem via the cam and the rocker arm so as to open and close the intake valve (or the exhaust valve).
  • the lash adjuster automatically adjusts the valve clearance between the cam and the rocker arm by driving (extending and contracting operation).
  • a mechanical type is proposed in addition to a hydraulic type.
  • a mechanical ash adjuster has an outer peripheral surface of a plunger screwed into an inner peripheral surface of a cylindrical body having at least one end opened, and is attached between the body and the plunger.
  • a biasing means is interposed so as to bias the plunger in a direction extending with respect to the body.
  • the mechanical lash adjuster responds to the load state acting on the lash adjuster (plunger) via the rocker arm based on the screwed relationship between the inner peripheral surface of the body and the outer peripheral surface of the plunger and the urging force of the urging means. To extend or stop to expand or contract.
  • the biasing means is housed in the body and the plunger outer peripheral surface is screwed onto the inner peripheral surface of the body before use (before being incorporated into the valve mechanism).
  • the plunger must be brought into the body.
  • the plunger and the body are gripped in a relatively non-rotatable manner (gripping by hand in the case of an operator, gripping by a conveying means or gripping means in the case of an assembly device), and the plunger outer peripheral surface and the body inner peripheral surface are Under the screwed state, the body and the plunger are rotated relative to each other in the direction in which the plunger is shortened with respect to the body while resisting the biasing force of the biasing means. Must enter)).
  • the body and the plunger are formed in a substantially cylindrical shape, and it is difficult to accurately transmit the gripping force to the body and the plunger, while the plunger is screwed (entered) to the body.
  • the urging force of the urging means increases, and in order for the plunger to be further screwed into the body, the screwing force must overcome the urging force of the urging means that gradually increases. For this reason, it is not always easy to accurately assemble (manufacture) the body and the plunger not only in the case of manual work but also in the case of automation.
  • the present invention has been made in consideration of the above-described circumstances, and a first object thereof is a mechanical lash capable of assembling the plunger and the body as accurately and quickly as possible in automating the assembly. To provide an adjuster.
  • the second object is to provide a manufacturing method of a mechanical lash adjuster that can assemble the plunger and the body as accurately and quickly as possible in automating the assembly.
  • the outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger.
  • the urging means is interposed so as to urge the plunger in a direction extending with respect to the body.
  • the other for fitting one of them is formed so as to correspond to the fact that the rotation suppressing jig used at the time of assembling has either one of a projection or a recess showing a non-circular shape in plan view.
  • the plunger has a cross-sectional shape that is formed in a non-circular shape at the tip of the plunger. Preferred embodiments of claim 1 are as described in claims 2 to 6.
  • the outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger.
  • the biasing means is interposed so as to bias the plunger in a direction extending with respect to the body.
  • a rotation suppression jig provided with one of a protrusion or a recess showing a non-circular shape in plan view, and the body as the other end surface of the body, corresponding to one of the protrusion or the recess of the rotation suppression jig, Prepare one having the other for fitting one, a plunger having a non-circular cross-sectional shape at the tip of the plunger, and the biasing means.
  • the other end surface of the body is placed on one of the protrusions or recesses of the rotation suppression jig from the upper side of the rotation suppression jig by using a body transport tool,
  • a plunger conveying tool the plunger is conveyed so that the proximal end surface of the plunger enters the one end opening of the body in a state where the distal end portion of the plunger is gripped, and the base of the plunger is
  • the biasing means is housed in the body by the time when the end surface is conveyed so as to enter the one end opening of the body,
  • one of the plunger conveying tool or the rotation suppressing jig is rotated, and the protrusion or recess of the rotation suppressing jig is rotated.
  • the outer peripheral surface of the plunger and the inner peripheral surface of the body are rotated relative to each other in a state in which one of them is fitted to the other of the protrusion or the concave portion on the other end surface of the body.
  • the preferred embodiment of claim 7 is as described in claim 8 and the following.
  • the rotation suppressing jig used at the time of assembling has one of a protrusion or a recess showing a non-circular shape in plan view on the other end surface of the body. Since the other for fitting one of them is formed to correspond to that provided, the other end surface of the body is lowered onto one of the protrusion or recess of the rotation suppression jig and the rotation suppression treatment is performed.
  • One of the protrusions or recesses in the tool can be fitted into the other of the protrusions or recesses on the other end surface of the body, and the body can be made relatively unrotatable with respect to the rotation suppression jig.
  • the cross-sectional shape of the plunger is formed in a non-circular shape at the tip of the plunger, if the plunger transporter for transporting the plunger grips the tip of the plunger, the plunger The relative rotation between the transport tool and the plunger can be restricted.
  • the rotational force is It will be used accurately as a force to rotate the body relative to the body, and even if the biasing means is housed in the body, the plunger outer peripheral surface and the body inner peripheral surface are securely engaged with each other in a predetermined screwed state. can do. Therefore, when the assembly is automated, the plunger and the body can be assembled accurately based on the structure of the mechanical lash adjuster.
  • the body transport tool grips the body and transports it to the rotation restraining jig.
  • the body transport tool lowers the body onto the rotation restraining jig and the rotation restraining jig.
  • the body can be held in a self-supporting manner so as not to be relatively rotatable with respect to the rotation suppression jig. For this reason, not only can the plunger be immediately assembled to the opening of the self-supporting body, but also the body transporter that has transported the body can be immediately transferred to the next operation.
  • the assembly time (cycle time) required for one assembly of the body and plunger is shortened compared to using the body carrier (gripping the body). can do. Therefore, when the assembly is automated, the plunger and the body can be quickly assembled based on the structure of the mechanical lash adjuster.
  • both the transport of the body to the rotation restraining jig and the transport of the plunger to the body held by the rotation restraining jig should be a simple path that moves down after being moved above the rotation restraining jig. Therefore, it is possible to simplify the control of the conveyance device for the body and the conveyance device for the plunger. Therefore, in automating the assembly, the plunger and the body can be assembled accurately (reliably) from the above viewpoint based on the structure of the mechanical lash adjuster.
  • the protrusion is fitted on the other end surface of the body so as to correspond to the fact that the rotation suppressing jig used at the time of assembling has a protrusion showing a non-circular shape in plan view. Since the fitting recessed part for forming is formed, the specific aspect of the said Claim 1 can be provided.
  • the other end surface of the body has a flat surface except for the fitting recess
  • the bottom surface of the storage recess of the cylinder head that stores the mechanical lash adjuster is used.
  • the other end surface of the body can be brought into contact with a flat surface. Therefore, the mechanical lash adjuster can be stably disposed in the storage recess of the cylinder head, and the relative rotation of the mechanical lash adjuster with respect to the storage recess of the cylinder head can be suppressed as much as possible by obtaining a frictional force as much as possible. .
  • the fitting recess includes the plurality of standing uprights to correspond to the fact that the protrusions of the rotation suppressing jig extend radially while standing up the plurality of upstanding plate parts. Since it is formed as a plurality of fitting grooves that fit the plate part, the relative rotation of the body with respect to the rotation suppression jig can be reliably controlled by fitting the plurality of upright plate parts and the plurality of fitting grooves. In assembling the body and the plunger, the body and the plunger can be accurately rotated relative to each other.
  • the body has one end and the other end opened, and the plurality of fitting grooves are formed on the end surface of the peripheral edge that defines the other end opening of the body.
  • a plurality of fitting grooves a normal cylinder generally used as a body in a mechanical lash adjuster (both ends are open, but when used, a spring seat plate is attached to the other end of the body ) Easy to apply.
  • the opening is formed on the other end surface of the body and the plurality of fitting grooves are formed only on the end surface of the peripheral edge that defines the opening, the processing load of the fitting groove can be suppressed as much as possible.
  • the pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger.
  • the pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger,
  • the rotation suppression jig provided with one of a projection or a recess having a non-circular shape in plan view, and the rotation suppression jig on the other end surface of the body as the body.
  • the other for fitting one is formed, and as the plunger, the cross-sectional shape of the tip of the plunger is formed in a non-circular shape Prepared and the biasing means,
  • the other end surface of the body is placed on one of the protrusion or recess of the rotation suppression jig from the upper side of the rotation suppression jig by using a body transport tool, and then the plunger
  • the plunger is transported so that the proximal end portion of the plunger enters the one end opening of the body in a state where the distal end portion of the plunger is gripped, and the proximal end portion of the plunger is
  • the biasing means is housed in the body by the time it is transported so as to enter the one end opening of the body, and then the plunger transport is maintained while the plunger tip is held by the plunger transport tool.
  • the mechanical lash adjuster according to claim 1 can be manufactured (assembled) under automation. And body can be assembled as accurately and quickly as possible.
  • a rotation suppression jig having a non-circular projection in plan view is used, and as a body, fitting for fitting the projection to the other end surface of the body Since what uses a recessed part is used, the mechanical lash adjuster which concerns on the above-mentioned Claim 2 can be manufactured.
  • the mechanical lash adjuster according to the third aspect of the present invention can be manufactured by using a plurality of fitting grooves for fitting the plurality of standing plate portions corresponding to the standing plate portions.
  • the mechanical lash adjuster according to the above-described fourth aspect can be manufactured.
  • a plunger formed with a pair of gripping surfaces forming a flat surface facing each other in the radial direction of the plunger is used on the outer peripheral surface of the distal end portion of the plunger.
  • a bottomed cylinder capable of lowering the body from above into the rotation suppression jig, the bottom inner surface of the bottomed cylinder being Since a plurality of upright plate parts are used, when the body is lowered from the other end face side into the bottomed cylindrical rotation restraining jig, a plurality of fittings on the other end face of the body are assumed. Even if the plurality of upright plate portions of the rotation suppressing jig are not fitted into the groove and the other end surface of the body is placed on the plurality of upright plate portions, the base end surface of the plunger enters the one end opening of the body thereafter.
  • a snap ring that can be expanded and contracted is fitted on the outer periphery of the tip of the plunger, and the tip of the plunger tip is positioned more than the retaining ring.
  • the retaining ring is held by the plunger carrier as the plunger is gripped by the plunger carrier, and the plunger outer peripheral surface and the body inner peripheral surface are rotated relative to each other to move the plunger into the body.
  • the retaining ring is pushed into the peripheral edge of the body, and the retaining ring is held at the inner peripheral edge of the opening of the body. Therefore, the retaining ring is pushed into the peripheral edge of the body opening from the gripping state (posture) of the plunger tip.
  • the plunger conveying tool can be effectively used for holding the retaining ring on the inner peripheral surface of the opening of the body.
  • the work surface is constituted by the upper surface of the turntable, a plurality of rotation suppression jigs are prepared as the rotation suppression jig, and the plurality of rotation suppression jigs are connected to the upper surface of the turntable.
  • the turntable is fixed at a predetermined interval in the circumferential direction of the turntable, and the rotation control of the turntable shifts each rotation suppression jig to each assembling step in sequence. Assembling of the plunger and the box can be performed sequentially using a jig. For this reason, when mass production of the said mechanical lash adjuster is aimed at, a preferable manufacturing method can be provided.
  • the plunger outer peripheral surface and the body inner peripheral surface are relatively rotated to bring the plunger outer peripheral surface and the body inner peripheral surface into a predetermined screwed state
  • the plunger and the body are relatively rotated by applying a rotational force to the body by the rotation suppression jig.
  • the plunger and the body can be accurately rotated in a specific manner.
  • FIG. 1 is a longitudinal sectional view showing a valve operating mechanism in which a hydraulic lash adjuster according to a first embodiment is incorporated.
  • the perspective view which shows the hydraulic lash adjuster which concerns on 1st Embodiment.
  • the bottom view which shows the hydraulic lash adjuster which concerns on 1st Embodiment.
  • 1 is a longitudinal sectional view showing a hydraulic lash adjuster according to a first embodiment.
  • attachment Specifically, FIG. 5 (a) is a diagram showing the contents of attaching the spring seat plate to the other end in the axial direction of the cylindrical body with the C-ring, and FIG. 5 (b) is a view after the spring seat plate is attached.
  • FIG. 5 (c) is a figure which shows the body which the assembly preparation completed.
  • FIG. 6A is a diagram showing the contents of fitting a retaining ring on the outer peripheral surface of the distal end portion of the plunger
  • FIG. 6B is a diagram showing the plunger that has been prepared for assembly.
  • FIG. 10A is a diagram illustrating insertion of a body into the rotation suppression jig
  • FIG. 10B is a diagram illustrating a state in which the body is inserted into the rotation suppression jig.
  • 10 (c) is a diagram illustrating conveyance of the plunger with respect to the body inserted into the rotation suppression jig
  • FIG. 10 (d) is a relative rotation (screwing) of the plunger with respect to the body inserted into the rotation suppression jig.
  • FIG. 10E is a diagram showing that the plunger has reached a predetermined screwed state with respect to the body inserted into the rotation suppressing jig.
  • FIGS. 11 (a) to 11 (e) are views showing the relationship between the fitting groove and the upright plate portion in a state corresponding to FIGS. 10 (a) to 10 (e).
  • reference numeral 1 denotes a valve mechanism of an internal combustion engine.
  • the valve mechanism 1 is an intake or exhaust valve (hereinafter referred to as a valve) 2 for opening and closing an intake port (or exhaust port) 8 as a mechanism for opening and closing an intake port (or exhaust port) 8 connected to a combustion chamber.
  • a valve intake or exhaust valve
  • a cam 3 that is rotationally driven, a rocker arm 4 that is disposed between the valve 2 and the cam 3 and is rocked by the rotational driving force of the cam 3, and a mechanical lash adjuster 5 that supports the rocker arm 4 as a fulcrum. I have.
  • valve 2 is integrally provided with a valve stem 6, and the valve stem 6 is inserted into a through-hole 9 connected to an intake port (or exhaust port) 8 formed in a cylinder head 7 of the engine. It is slidably inserted.
  • a valve spring 10 is wound around the outer periphery of the valve stem 6 with a loose fit.
  • the valve spring 10 is mounted between a cylinder head 7 and a retainer 11 fixed to the upper portion of the valve stem 6. The valve 2 is urged in a direction to close the opening of the intake port (or exhaust port) 8.
  • the cam 3 is fixed to a camshaft 12 that is driven to rotate in synchronization with the rotation of the automobile engine, and the cam 3 is driven to rotate as the camshaft 12 rotates.
  • the rocker arm 4 transmits the rotational driving force of the cam 3 to the valve stem 6 by swinging based on the rotational drive of the cam 3, and the valve stem 6 responds to the swing of the rocker arm 4.
  • the through hole 9 is slid.
  • the valve 2 opens and closes the intake port (or exhaust port) 8 in accordance with the sliding of the valve stem 6.
  • the mechanical lash adjuster 5 has a structure in which a plunger 14 is slidably fitted in a body 13 as shown in FIG. 1 so as to support the rocker arm 4 as a fulcrum.
  • the body 13 is housed in a circular recess 15 formed on the upper side of the cylinder head 7 in plan view.
  • the body 13 is formed in a substantially cylindrical shape corresponding to the recess 15, and the body 13 has one end in the axial direction in a state in which one end in the axial direction slightly protrudes outward from the opening of the recess 15. The other end portion in the axial direction than the portion is accommodated in the recess 15.
  • the opening 13aa of one end surface (hereinafter referred to as one end surface) 13a in the body 13 opens to the outside of the recess 15 and the other end surface in the axial direction (hereinafter referred to as the other end surface) 13b of the body 13 is the bottom surface in the recess 15. Is supposed to face.
  • a plurality of fitting grooves 16 are formed on the other end surface 13b of the body 13 as shown in FIGS.
  • the plurality of fitting grooves 16 extend radially about the axis OB of the body 13, but as described above, the other end surface 13b of the body 13 has the opening 13ba.
  • the plurality of fitting grooves 16 do not exist in the opening 13ba, but exist only in the peripheral edge surface 13bb that defines the opening 13ba. Therefore, each fitting groove 16 has a groove extending direction in a thickness direction of the peripheral edge surface 13bb while a groove width direction is directed in a circumferential direction of the peripheral edge surface 13bb. More specifically, the plurality of fitting grooves 16 are formed as four fitting grooves 16. For this reason, each of the fitting grooves 16 is arranged at equal angles (90 degrees) in the circumferential direction of the peripheral edge surface 13bb of the body 13.
  • a female thread 17 is formed on the inner peripheral surface of the body 13 over the entire length in the axial direction.
  • the female screw 17 constitutes a screw engaging portion 19 (see FIG. 4) in cooperation with a male screw 18 in the plunger 14 described later.
  • holding grooves 20 and 21 are formed on the inner peripheral surface of the body 13 at the inner peripheral edge of the opening on the other end side in the axial direction and the inner peripheral edge of the opening on the one end side in the axial direction.
  • a so-called C-ring (C-shaped retaining ring) 22 is fitted in the holding groove 20 as an expandable / contractible stopper, and a spring is formed on the C-ring 22 (a portion protruding radially inward from the inner peripheral surface of the body 13).
  • the seat surface plate 23 is seated, and the other end side opening 13ba in the body 13 is slightly blocked on the inner side in the axial direction by the spring seat surface plate 23.
  • a retaining ring 24 (for example, a so-called C ring) that can be expanded and contracted is fitted in the holding groove 21 as a stopper, and the retaining ring 24 prevents the plunger 14 described later from coming off.
  • the plunger 14 As the plunger 14, a rod-like member is used as shown in FIGS.
  • the plunger 14 has a distal end portion 25 that is on one side in the axial direction, a cylindrical main body portion 26 that extends in a slightly larger diameter than the distal end portion 25 on the other axial side of the distal end portion 25, and
  • the plunger 14 protrudes outward from the opening 13aa of the one end surface 13a of the body 13 in a state where the main body portion 26 has entered the body 13.
  • the plunger 14 is formed with a step portion 27 between the outer peripheral surface of the tip portion 25 and the outer peripheral surface of the main body portion 26, and the step portion 27 accompanying the movement of the plunger 14 (movement of the body 13 in the axial direction).
  • the retaining ring 24 faces the moving region.
  • the distal end surface of the distal end portion 25 of the plunger 14 is formed so as to swell in a substantially hemispherical shape as shown in FIG.
  • the rocker arm 4 Corresponding to the substantially hemispherical tip surface of the plunger 14, the rocker arm 4 has a substantially hemispherical recess 28 formed on the contact surface with the plunger 14, and the inside and outside of the recess 28. And a communication passage 29 for communicating with each other, and the distal end portion 25 of the plunger 14 receives the concave portion 28 of the rocker arm 4 as a fulcrum of the rocker arm 4.
  • a pair of gripping surfaces 25 ⁇ / b> A is formed on the outer peripheral surface of the distal end portion 25 of the plunger 14.
  • the pair of gripping surfaces 25A are arranged so as to face each other in the radial direction of the plunger 14, and the distal end portion 25 portion is formed in a non-circular cross-sectional shape based on the pair of gripping surfaces 25A.
  • a male screw 18 is formed on the outer peripheral surface of the body portion 26 of the plunger 14 corresponding to the female screw 17 on the inner peripheral surface of the body 13.
  • the male screw 18 is formed over the entire length in the axial direction of the main body portion 26.
  • the male screw 18 and the female screw 17 on the inner peripheral surface of the body 13 slide and rotate to rotate in the axis OB direction of the body 13 (the axis of the plunger 14).
  • a screw engaging portion 19 for displacement movement in the OP direction) is to be configured.
  • a spring housing space 30 and a communication hole 31 are formed inside the main body 26 of the plunger 14.
  • the spring storage space 30 is formed in the main body portion 26 over substantially the entire length in the axial direction of the main body portion 26, and the spring storage space 30 is the base end surface 26 a of the main body portion 26 (the other side surface in the axial direction of the plunger 14).
  • To the spring seat plate 23 To the spring seat plate 23.
  • the communication hole 21 is formed inside the plunger tip 25 so as to allow the oil that has entered the body 13 to be discharged.
  • One end of the communication hole 21 is opened in the spring housing space 30 and the other end is formed.
  • An opening is formed in the recess 28 (communication path 29) of the rocker arm 4 from the distal end surface of the plunger distal end portion 25.
  • a plunger spring 32 is accommodated as shown in FIGS.
  • the plunger spring 32 is interposed between the inner bottom surface of the spring housing space 30 and the spring seat plate 23, and the plunger 14 is urged in the extending direction by the plunger spring 32. Yes.
  • the plunger 14 slides and rotates between the plunger 14 and the body 13 at the screw engaging portion 19 according to the load state of the rocker arm 4 with respect to the plunger 14. By doing so, it is extended or shortened.
  • the sum of the friction torque between the plunger tip portion 25 and the rocker arm 4 and the friction torque between the plunger 14 and the plunger spring 32 is a thrust torque that causes the screw engagement portion 19 to slide and rotate by a load acting on the plunger 14.
  • the sliding rotation of the screw engaging portion 19 is suppressed, so that the screw engaging portion 19 becomes immobile, and the plunger 14 functions as a rocking fulcrum of the rocker arm 4.
  • the valve clearance between the cam 3 and the rocker arm 4 is automatically adjusted by driving (extending / contracting) the mechanical lash adjuster 5 as described above.
  • such a mechanical lash adjuster 5 is assembled on the inner peripheral surface of the body 13 after the plunger spring 32 is accommodated in the body 13 before being used (before being assembled into the valve mechanism 1).
  • the male screw 18 on the outer peripheral surface of the plunger 14 is screwed into the female screw 17 so that the plunger 14 (main body portion 26) enters the body 13.
  • automation is achieved by using an assembling apparatus.
  • the body 13, the plunger 14, and further the rotation restraining jig 33 which are components of the mechanical lash adjuster 5 described above, are prepared prior to the assembly.
  • the body 13 has a spring seat surface plate 23 attached in advance using a C ring 22 at the inner peripheral edge of the opening on the other end side in the axial direction.
  • the opening 13ba of 13b is closed (see FIGS. 5B and 5C).
  • a plunger spring 32 is housed in the body 13 after the spring seat plate 23 is attached (see FIGS. 5B and 5C).
  • the plunger 14 is fitted with a retaining ring 24 in advance on the outer peripheral surface of the distal end portion 25 of the plunger 14, and the retaining ring 24 has a pair of gripping surfaces 25A. It is located on the main body part 26 side.
  • the rotation suppression jig 33 is formed with a bottomed cylindrical body integrally including a disc-shaped bottom portion 33 a and a cylindrical portion 33 b erected from the periphery of the bottom portion. .
  • the internal size of the rotation suppression jig 33 (bottomed cylindrical body) is such that the body 13 can be inserted through the opening, and the body 13 can rotate relative to the rotation suppression jig 33 in the inserted state. The state can be secured.
  • a plurality of upright plate portions 34 are provided on the inner surface of the bottom 33 a of the rotation suppressing jig 33 so as to correspond to the plurality of fitting grooves 16 on the peripheral edge surface 13 bb of the body 13.
  • Each of the standing plate portions 34 is arranged radially about the axis OJ of the rotation suppressing jig 33 with the plate surface of each rising plate portion 34 directed in the circumferential direction of the rotation suppressing jig 33.
  • the four upright plate portions 34 are arranged at equal angles (90 degrees) so as to correspond to the four fitting grooves 16 in the body 13 described above.
  • the wall thickness of each upright plate portion 34 is slightly shorter than the groove width of each fitting groove 16 on the peripheral end surface 13bb (the other end surface in the axial direction) of the body 13, and a plurality of upright plate portions 34 are provided.
  • the rotation suppression jig 33 is arranged on the turntable 35 at predetermined intervals in the circumferential direction, and the turntable It is preferable to move each rotation suppression jig 33 sequentially to each assembly step by moving 35 (rotation: the rotation direction is indicated by an arrow in FIG. 9).
  • the plunger 14 and the rotation suppression jig 33 are prepared, first, as shown in FIG. 10A, after fixing the bottom 33 a of the rotation suppression jig 33 on the work surface 37, The body 13 is inserted into the rotation suppression jig 33 from above.
  • FIG. 10A a body transport tool (FIG. 10A, FIG. 12 shows a pair of gripping claws) 36 that can be transported while gripping the body 13 is used.
  • FIG. 12 the body 13 is gripped and conveyed above the upper opening 13 a of the rotation suppressing jig 33, the body 13 is lowered from this state, and the body 13 is moved to the body 13. It inserts into the rotation suppression jig 33 from the other end side in the axis OB direction (see also FIG. 10B).
  • the plunger 14 has a base end surface 26 a side of the body 13 in the rotation suppression jig 33. It is conveyed so as to enter the one end face opening 13aa.
  • the plunger transport tool 38 includes a main body 39 that is attached to a robot arm or the like (not shown) and is movable in various directions. Is provided with a rotating portion 41 that is rotated by a motor 40. As shown by the arrows in FIG. 13, a pair of gripping claws 42 that can move toward and away from each other based on compressed air or the like are provided on the lower surface of the rotating portion 41. A hanging portion 43 that hangs down from the rotating portion 41, and a claw portion 44 that protrudes from the tip of the hanging portion 43 toward the counterpart member 42. Moreover, a pressing portion 45 for pressing the retaining ring 24 is provided on the lower surface of each claw portion 44 in a protruding state.
  • the plunger transport tool 38 grips the pair of gripping surfaces 25A of the plunger tip 25 with the tips of the claws 44 of the pair of gripping claws 42, and maintains the state of the plunger 14 while maintaining the base end surface 26a. It conveys so that the side may enter into one end opening of the body 13.
  • the pair of claws 44 grips the pair of gripping surfaces 25A of the plunger tip 25 in order to restrict the relative rotation between the pair of claws 44 and the plunger 14, and the gripping position of the pair of claws 44 depends on the plunger tip.
  • the retaining ring 24 comes to the distal end side of the plunger with respect to the retaining ring 24 fitted to the outer peripheral surface of the portion 25, and the retaining ring 24 faces the area below the pressing portion 45 of each claw portion 44.
  • the plunger 14 is rotated about its axis by the plunger conveying tool 38.
  • the rotation of the plunger 14 initially causes the plunger 14 and the body 13 to rotate together as shown in FIG.
  • the body 13 rotates relative to the rotation restraining jig 33 and each of the plurality of fitting grooves 16 on the peripheral edge surface 13bb of the body 13 faces each of the plurality of upright plate portions 34, FIG. 11 (e)
  • the plurality of upright plate portions 34 are fitted into the plurality of fitting grooves 16.
  • the rotation suppression jig 33 and the body 13 are in a state where relative rotation is impossible, and the plunger 14 and the body 13 (rotation suppression jig 33) rotate relative to each other by further rotation of the plunger 14.
  • the male screw 18 on the outer peripheral surface of the plunger 14 and the female screw 17 on the inner peripheral surface of the body 13 start to be screwed together, and the plunger 14 enters the body 13.
  • the plunger carrier 14 descends as the plunger 14 enters the body 13 based on the screwing of the outer circumferential surface of the plunger 14 and the inner circumferential surface of the body 13.
  • the retaining ring 24 fitted to the plunger tip 25 comes into contact with the opening end surface of the box 14.
  • the plunger 14 is about to be moved to the tip end side, but the pressing portions 45 of the pair of gripping claws 42 in the plunger carrier 38 push back the retaining ring 24, and based on this, the retaining ring 24 is
  • the diameter of the body 13 is once reduced by being guided to the inner peripheral edge of the opening, and then reaches the holding groove 21 at the inner peripheral edge of the opening to be expanded again. Accordingly, the retaining ring 24 is fitted and held in the retaining groove 21 of the body 13, and thereafter, the plunger 14 can expand and contract with respect to the body 13 in a range until the movement is restricted by the retaining ring 24.
  • the plunger transport tool 38 When the retaining ring 24 is fitted and held in the holding groove 21 of the body 13, the plunger transport tool 38 is lifted while maintaining the grip on the plunger 14, and the body 13 and the plunger 14 are assembled.
  • the mechanical lash adjuster 5 is pulled out from the rotation restraining jig 33. Then, the mechanical lash adjuster 5 is transported to the assembled finished product storage place by the plunger transport tool 38, and the series of assembly work of the plunger 14 and the body 13 is completed.
  • the plurality of upright plate portions 34 in the rotation suppression jig 33 are fitted into the fitting grooves 16 in the body 13 so that the rotation suppression jig 33 and the body 13 cannot be relatively rotated.
  • the pair of gripping claws 42 of the plunger tip portion 25 are gripped by the pair of gripping claws 42 of the plunger transport tool 38 so that the pair of gripping claws 42 and the plunger 14 are not relatively rotatable.
  • the rotation suppression jig 33 is formed of a bottomed cylindrical body, and if the body 13 is inserted into the rotation suppression jig 33 from the upper opening, the rotation suppression jig 33 holds the body 13 in a self-supporting manner ( As shown in FIGS. 10 (b) and 12) and FIG. 12, the assembly of the plunger 14 to the body 13 can be started immediately, while the body transport tool 36 is immediately moved to the next operation. Can do. For this reason, as compared with the case where the plunger 14 is gripped by the plunger transport tool 38 and the body 13 is gripped by the body transport tool 36, both the parts 14 and 13 are assembled until a predetermined screwed state is obtained. , Cycle time (installation time required for one assembly) can be shortened.
  • the plurality of upright plate portions 34 of the rotation suppression jig 33 do not fit into the fitting grooves 16 in the body 13.
  • the plunger 14 is assembled to the body 13
  • the plurality of upright plate portions 34 of the rotation suppressing jig 33 and the fitting grooves 16 in the body 13 are automatically fitted to each other.
  • the body 13 can be lowered or inserted into the rotation suppression jig 33. There is no need to provide a function for fitting the plurality of fitting grooves 16 to the plurality of upright plate portions 34 of the rotation suppressing jig 33.
  • the conveyance of the body 13 to the rotation suppression jig 33 and the conveyance of the plunger 14 to the body 13 held by the rotation suppression jig 33 are both above the rotation suppression jig 33 as shown in FIG. Since it is possible to form a simple path to be lowered after the movement, it is possible to simplify the control of the conveyance of the body conveyance tool 36 and the plunger conveyance tool 38.
  • the retaining ring 24 fitted in advance on the outer peripheral surface of the plunger tip portion 25 is attached to the body 13 by using the pressing portion 45 of the plunger transport tool 38 in association with the assembly of the plunger 14 and the body 13. Therefore, the plunger carrier 21 can be used effectively with respect to holding the retaining ring 24 in the holding groove 21 on the inner peripheral edge of the opening of the body 13.
  • FIG. 15 shows a second embodiment.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the plunger transport tool 38 has only a gripping function and no rotation function with respect to the plunger 14. It shows what is rotated about the axis OJ.
  • a recess 46 is formed in the work plate 37A constituting the work surface 37, and the rotation suppression jig 33 is accommodated in the recess 46 so as to be relatively rotatable.
  • a support shaft 47 is provided on the outer surface of the bottom of the rotation restraining jig 33, and the support shaft 47 extends through the bottom of the recess 46 to rotate below the work plate 37 ⁇ / b> A.
  • the driving force of the motor 48 is transmitted as a rotational force via a driving force transmission mechanism (specifically, gears) 49.
  • the rotation suppression jig 33 can be rotated about the axis OJ by using the driving force of the motor 48, and the plunger transport tool 38 need not have a function of rotating the plunger 14. .
  • a plurality of fitting grooves extending radially about the axis of the rotation suppression jig 33 are formed on the inner surface of the bottom of the rotation suppression jig 33, while the rotation suppression jig 33 is formed on the end surface of the peripheral edge of the body 13.
  • a plurality of upright plate portions that fit into the plurality of fitting grooves are formed in correspondence with the plurality of fitting grooves.
  • the number of the plurality of upright plate portions 34 and the number of the plurality of fitting grooves 16 are not limited to four, but two or more are sufficient, and three or more are preferable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The invention relates to assembly automation, and the objective of the invention is to assemble a plunger and a body as accurately and quickly as possible. An outer circumferential surface of a plunger (14) is screwed together with an inner circumferential surface of a cylindrical body (13), and a plunger spring (32) is interposed between the body (13) and the plunger (14). A rotation suppression jig (33) used during assembly is provided with a plurality of upright plate portions (34), and a plurality of engagement grooves (16) which engage with the plurality of upright plate portions (34) are correspondingly formed on another end surface (13b) of the body. A pair of holding surfaces (25A) forming flat surfaces are formed on a plunger tip portion (25) so as to face each other in a radial direction of the plunger (14).

Description

機械式ラッシュアジャスタ及び機械式ラッシュアジャスタの製造方法Mechanical lash adjuster and method for manufacturing mechanical lash adjuster
　本発明は、機械式ラッシュアジャスタ及び機械式ラッシュアジャスタの製造方法に関する。 The present invention relates to a mechanical lash adjuster and a method for manufacturing the mechanical lash adjuster.
　自動車等の内燃機関においては、エンジンの回転に同期して回転駆動されるカムシャフトに固定されたカムと、吸気バルブ（又は排気バルブ）におけるバルブステムとの間に、ロッカアームがラッシュアジャスタを支点として揺動可能に配置され、カムシャフトからの駆動力は、吸気バルブ（又は排気バルブ）を開閉するべく、カム及びロッカアームを介してバルブステムに伝達される。この際、ラッシュアジャスタは、その駆動（伸縮動作）により、カムとロッカアームとのバルブクリアランスを自動調整する。 In an internal combustion engine such as an automobile, a rocker arm uses a lash adjuster as a fulcrum between a cam fixed to a camshaft that is driven to rotate in synchronization with the rotation of the engine and a valve stem of an intake valve (or an exhaust valve). The driving force from the camshaft is transmitted to the valve stem via the cam and the rocker arm so as to open and close the intake valve (or the exhaust valve). At this time, the lash adjuster automatically adjusts the valve clearance between the cam and the rocker arm by driving (extending and contracting operation).
　前記ラッシュアジャスタとして、油圧式のものに加えて、機械式のものが提案されている。機械式アッシュアジャスタは、一般に、特許文献１に示すように、少なくとも一端が開口された筒状のボディの内周面にプランジャの外周面が螺合され、前記ボディと前記プランジャとの間に付勢手段が該プランジャを該ボディに対して伸長する方向に付勢するようにして介装されている。これにより、機械式ラッシュアジャスタは、そのボディ内周面とプランジャ外周面との螺合関係、付勢手段の付勢力に基づき、該ラッシュアジャスタ（プランジャ）にロッカアームを介して作用する荷重状態に応じて、伸縮動又は伸縮停止する。 As the lash adjuster, a mechanical type is proposed in addition to a hydraulic type. In general, as shown in Patent Document 1, a mechanical ash adjuster has an outer peripheral surface of a plunger screwed into an inner peripheral surface of a cylindrical body having at least one end opened, and is attached between the body and the plunger. A biasing means is interposed so as to bias the plunger in a direction extending with respect to the body. As a result, the mechanical lash adjuster responds to the load state acting on the lash adjuster (plunger) via the rocker arm based on the screwed relationship between the inner peripheral surface of the body and the outer peripheral surface of the plunger and the urging force of the urging means. To extend or stop to expand or contract.
　このような機械式ラッシュアジャスタにおいては、使用前に（動弁機構に組込む前に）、組付け状態として、ボディ内に付勢手段を収納した上で、ボディ内周面にプランジャ外周面を螺合することにより、プランジャをボディ内に進入させた状態にしなければならない。このため、プランジャとボディとをそれぞれ相対回転不能に把持（作業者の場合は手による把持、組付け装置の場合は搬送手段又は把持手段による把持）し、プランジャ外周面とボディ内周面とを螺合させた状態の下で、付勢手段の付勢力に抗しつつ、ボディに対してプランジャが短縮動する方向に該ボディと該プランジャとを相対回転（ボディに対してプランジャを螺進（進入））させなければならない。 In such a mechanical lash adjuster, the biasing means is housed in the body and the plunger outer peripheral surface is screwed onto the inner peripheral surface of the body before use (before being incorporated into the valve mechanism). By combining, the plunger must be brought into the body. For this reason, the plunger and the body are gripped in a relatively non-rotatable manner (gripping by hand in the case of an operator, gripping by a conveying means or gripping means in the case of an assembly device), and the plunger outer peripheral surface and the body inner peripheral surface are Under the screwed state, the body and the plunger are rotated relative to each other in the direction in which the plunger is shortened with respect to the body while resisting the biasing force of the biasing means. Must enter)).
ＷＯ　２０１３／１３６５０８　Ａ１WO 2013/136508 A1
　しかし、上記機械式ラッシュアジャスタは、ボディ及びプランジャが略円筒状に形成されていて、ボディ及びプランジャに対して把持力を的確に伝達しにくい一方で、ボディに対してプランジャを螺進（進入）させるに伴い、付勢手段の付勢力が高まり、ボディに対してプランジャをさらに螺進させるためには、その螺進する力が、次第に高まる付勢手段の付勢力に打ち勝たなければならない。このため、手作業による場合は勿論、自動化を図る場合においても、ボディとプランジャとの組付け（製造）を的確に行うことは必ずしも容易ではない。 However, in the mechanical lash adjuster, the body and the plunger are formed in a substantially cylindrical shape, and it is difficult to accurately transmit the gripping force to the body and the plunger, while the plunger is screwed (entered) to the body. As a result, the urging force of the urging means increases, and in order for the plunger to be further screwed into the body, the screwing force must overcome the urging force of the urging means that gradually increases. For this reason, it is not always easy to accurately assemble (manufacture) the body and the plunger not only in the case of manual work but also in the case of automation.
　特に組付けの自動化を図るに当たっては、上記内容に加えて、ボディとプランジャとを具体的にどのようにして組付けるかは、迅速性、的確性等に大きな影響を与える。 In particular, in order to automate the assembly, in addition to the above contents, how the body and the plunger are specifically assembled greatly affects the speediness and accuracy.
　本発明は以上のような事情を勘案してなされたもので、その第１の目的は、組付けの自動化に当たって、プランジャとボディとを、極力、的確且つ迅速に組付けることができる機械式ラッシュアジャスタを提供することにある。 The present invention has been made in consideration of the above-described circumstances, and a first object thereof is a mechanical lash capable of assembling the plunger and the body as accurately and quickly as possible in automating the assembly. To provide an adjuster.
　第２の目的は、組付けの自動化に当たって、プランジャとボディとを、極力、的確且つ迅速に組付けることができる機械式ラッシュアジャスタの製造方法を提供することにある。 The second object is to provide a manufacturing method of a mechanical lash adjuster that can assemble the plunger and the body as accurately and quickly as possible in automating the assembly.
　前記第１の目的を達成するために本発明（請求項１に係る発明）にあっては、
　一端面が開口された筒状のボディの内周面にプランジャの外周面が、該プランジャの先端部を該ボディの一端開口から突出させた状態で螺合され、前記ボディと前記プランジャとの間に付勢手段が該プランジャを該ボディに対して伸長する方向に付勢するようにして介装されている機械式ラッシュアジャスタにおいて、
　前記ボディの他端面に、組付け時に用いる回転抑制治具が平面視非円形形状を示す突部又は凹部の一方を備えていることに対応すべく、その一方を嵌合するための他方が形成され、
　前記プランジャの横断面形状が、該プランジャの先端部において、非円形形状に形成されている構成とされている。この請求項１の好ましい態様としては、請求項２～６に記載の通りである。 In order to achieve the first object of the present invention (the invention according to claim 1),
The outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger. In the mechanical lash adjuster, the urging means is interposed so as to urge the plunger in a direction extending with respect to the body.
On the other end surface of the body, the other for fitting one of them is formed so as to correspond to the fact that the rotation suppressing jig used at the time of assembling has either one of a projection or a recess showing a non-circular shape in plan view. And
The plunger has a cross-sectional shape that is formed in a non-circular shape at the tip of the plunger. Preferred embodiments of claim 1 are as described in claims 2 to 6.
　前記第２の目的を達成するために本発明（請求項７に係る発明）にあっては、
　一端面が開口された筒状のボディの内周面にプランジャの外周面が、該プランジャの先端部を該ボディの一端開口から突出させた状態で螺合され、前記ボディと前記プランジャとの間に付勢手段が該プランジャを該ボディに対して伸長する方向に付勢するようにして介装されている機械式ラッシュアジャスタの製造方法において、
　平面視非円形形状を示す突部又は凹部の一方が備えられる回転抑制治具と、前記ボディとして、該ボディの他端面に、前記回転抑制治具の突部又は凹部の一方に対応して、その一方を嵌合するための他方が形成されているものと、前記プランジャとして、該プランジャの先端部の横断面形状が非円形形状に形成されたものと、前記付勢手段と、を用意し、
　先ず、ボディ用搬送具を利用することにより、前記回転抑制治具の上方側から該回転抑制治具の突部又は凹部の一方上に前記ボディの他端面を載置し、
　次に、プランジャ用搬送具を利用することにより、前記プランジャを、該プランジャの先端部を把持した状態で該プランジャの基端面が前記ボディの一端開口に入り込むように搬送すると共に、該プランジャの基端面が該ボディの一端開口に入り込むように搬送されるときまでに該ボディ内に前記付勢手段を収納し、
　次に、前記プランジャ用搬送具による前記プランジャ先端部の把持状態を維持しつつ該プランジャ用搬送具又は前記回転抑制治具のうちの一方を回転させて、該回転抑制治具の突部又は凹部の一方を該ボディ他端面における突部又は凹部の他方に嵌合させた状態の下で、該プランジャの外周面と該ボディの内周面とを相対回転させる構成とされている。この請求項７の好ましい態様としては、請求項８以下の記載の通りである。 In order to achieve the second object of the present invention (the invention according to claim 7),
The outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger. In the manufacturing method of the mechanical lash adjuster, the biasing means is interposed so as to bias the plunger in a direction extending with respect to the body.
A rotation suppression jig provided with one of a protrusion or a recess showing a non-circular shape in plan view, and the body as the other end surface of the body, corresponding to one of the protrusion or the recess of the rotation suppression jig, Prepare one having the other for fitting one, a plunger having a non-circular cross-sectional shape at the tip of the plunger, and the biasing means. ,
First, the other end surface of the body is placed on one of the protrusions or recesses of the rotation suppression jig from the upper side of the rotation suppression jig by using a body transport tool,
Next, by using a plunger conveying tool, the plunger is conveyed so that the proximal end surface of the plunger enters the one end opening of the body in a state where the distal end portion of the plunger is gripped, and the base of the plunger is The biasing means is housed in the body by the time when the end surface is conveyed so as to enter the one end opening of the body,
Next, while maintaining the gripping state of the plunger tip by the plunger conveying tool, one of the plunger conveying tool or the rotation suppressing jig is rotated, and the protrusion or recess of the rotation suppressing jig is rotated. The outer peripheral surface of the plunger and the inner peripheral surface of the body are rotated relative to each other in a state in which one of them is fitted to the other of the protrusion or the concave portion on the other end surface of the body. The preferred embodiment of claim 7 is as described in claim 8 and the following.
　本発明（請求項１に係る発明）によれば、当該機械式ラッシュアジャスタにおいて、ボディの他端面に、組付け時に用いる回転抑制治具が平面視非円形形状を示す突部又は凹部の一方を備えていることに対応すべく、その一方を嵌合するための他方が形成されていることから、ボディの他端面を回転抑制治具の突部又は凹部の一方上に降ろしてその回転抑制治具における突部又は凹部の一方をそのボディ他端面における突部又は凹部の他方に嵌合させることができ、回転抑制治具に対してボディを相対回転不能にできる。他方、プランジャの横断面形状が、そのプランジャの先端部において、非円形形状に形成されていることから、プランジャを搬送するためのプランジャ用搬送具がそのプランジャの先端部を把持すれば、そのプランジャ用搬送具とプランジャとの相対回転を規制することができる。このため、プランジャ搬送具によりプランジャの基端面をボディの一端開口に入り込むようにし、この後、プランジャ用搬送具又は回転抑制治具のうちの一方を回転させれば、その回転力は、プランジャとボディとを相対回転させるための力として的確に利用されることになり、ボディ内に付勢手段が収納されていても、プランジャ外周面とボディ内周面とを確実に所定の螺合状態とすることができる。したがって、組付けの自動化に当たって、当該機械式ラッシュアジャスタの構造に基づき、プランジャとボディとを的確に組付けることができる。 According to the present invention (the invention according to claim 1), in the mechanical lash adjuster, the rotation suppressing jig used at the time of assembling has one of a protrusion or a recess showing a non-circular shape in plan view on the other end surface of the body. Since the other for fitting one of them is formed to correspond to that provided, the other end surface of the body is lowered onto one of the protrusion or recess of the rotation suppression jig and the rotation suppression treatment is performed. One of the protrusions or recesses in the tool can be fitted into the other of the protrusions or recesses on the other end surface of the body, and the body can be made relatively unrotatable with respect to the rotation suppression jig. On the other hand, since the cross-sectional shape of the plunger is formed in a non-circular shape at the tip of the plunger, if the plunger transporter for transporting the plunger grips the tip of the plunger, the plunger The relative rotation between the transport tool and the plunger can be restricted. For this reason, if the base end surface of the plunger is inserted into the one end opening of the body by the plunger transporter, and then one of the plunger transporter or the rotation suppression jig is rotated, the rotational force is It will be used accurately as a force to rotate the body relative to the body, and even if the biasing means is housed in the body, the plunger outer peripheral surface and the body inner peripheral surface are securely engaged with each other in a predetermined screwed state. can do. Therefore, when the assembly is automated, the plunger and the body can be assembled accurately based on the structure of the mechanical lash adjuster.
　また、組付けの自動化においては、ボディ用搬送具がボディを把持して回転抑制治具に搬送することになるが、ボディ用搬送具がボディを回転抑制治具上に降ろして該回転抑制治具における突部又は凹部の一方が該ボディ他端面における突部又は凹部の他方に嵌合したときには、回転抑制治具に対してボディを相対回転不能に自立保持させることができる。このため、その自立しているボディの開口に対してプランジャの組付けを直ちに行うことができるだけでなく、そのボディを搬送してきたボディ用搬送具を直ちに次の作業に移すことができることになり、ボディとプランジャとの組付け時においてもボディ用搬送具を使用（ボディを把持）している場合に比べて、ボディとプランジャの１回当たりの組付けに要する組付け時間（サイクルタイム）を短縮することができる。したがって、組付けの自動化に当たって、当該機械式ラッシュアジャスタの構造に基づき、プランジャとボディとを迅速に組付けることもできる。 Also, in the assembly automation, the body transport tool grips the body and transports it to the rotation restraining jig. However, the body transport tool lowers the body onto the rotation restraining jig and the rotation restraining jig. When one of the protrusion or recess in the tool is fitted to the other of the protrusion or recess in the other end surface of the body, the body can be held in a self-supporting manner so as not to be relatively rotatable with respect to the rotation suppression jig. For this reason, not only can the plunger be immediately assembled to the opening of the self-supporting body, but also the body transporter that has transported the body can be immediately transferred to the next operation. When assembling the body and plunger, the assembly time (cycle time) required for one assembly of the body and plunger is shortened compared to using the body carrier (gripping the body). can do. Therefore, when the assembly is automated, the plunger and the body can be quickly assembled based on the structure of the mechanical lash adjuster.
　さらに、回転抑制治具に対するボディの搬送、回転抑制治具に自立保持されたボディに対するプランジャの搬送を、いずれも、回転抑制治具の上方に移動させた後、降下させる単純な経路とすることができ、ボディ用搬送具及びプランジャ用搬送具の搬送等の制御を簡単化することができる。したがって、組付けの自動化に当たって、当該機械式ラッシュアジャスタの構造に基づき、上記観点からも、プランジャとボディとを的確に（確実に）組付けることもできる。 Furthermore, both the transport of the body to the rotation restraining jig and the transport of the plunger to the body held by the rotation restraining jig should be a simple path that moves down after being moved above the rotation restraining jig. Therefore, it is possible to simplify the control of the conveyance device for the body and the conveyance device for the plunger. Therefore, in automating the assembly, the plunger and the body can be assembled accurately (reliably) from the above viewpoint based on the structure of the mechanical lash adjuster.
　請求項２に係る発明によれば、ボディの他端面に、組付け時に用いる回転抑制治具が平面視非円形形状を示す突部を備えていることに対応すべく、その突部を嵌合するための嵌合凹部が形成されていることから、前記請求項１の具体的態様を提供できる。 According to the invention of claim 2, the protrusion is fitted on the other end surface of the body so as to correspond to the fact that the rotation suppressing jig used at the time of assembling has a protrusion showing a non-circular shape in plan view. Since the fitting recessed part for forming is formed, the specific aspect of the said Claim 1 can be provided.
　しかも、ボディの他端面が、嵌合凹部を除き、平坦面をなしていることから、当該機械式ラッシュアジャスタの使用に際して、その機械式ラッシュアジャスタを収納するシリンダヘッドの収納凹部の底面に対してボディ他端面を平坦面をもって当接させることができる。このため、シリンダヘッドの収納凹部内において、当該機械式ラッシュアジャスタを安定状態をもって配置できると共に、摩擦力を極力得ることにより、シリンダヘッドの収納凹部に対する当該機械式ラッシュアジャスタの相対回転を極力抑制できる。 In addition, since the other end surface of the body has a flat surface except for the fitting recess, when the mechanical lash adjuster is used, the bottom surface of the storage recess of the cylinder head that stores the mechanical lash adjuster is used. The other end surface of the body can be brought into contact with a flat surface. Therefore, the mechanical lash adjuster can be stably disposed in the storage recess of the cylinder head, and the relative rotation of the mechanical lash adjuster with respect to the storage recess of the cylinder head can be suppressed as much as possible by obtaining a frictional force as much as possible. .
　請求項３に係る発明によれば、嵌合凹部は、回転抑制治具の突部が複数の起立板部を起立させつつ放射状に伸びているものであることに対応すべく、該複数の起立板部を嵌合する複数の嵌合溝として形成されていることから、複数の起立板部と複数の嵌合溝との嵌合により、回転抑制治具に対するボディの相対回転を確実に規制でき、ボディとプランジャとの組付けに際し、ボディとプランジャとを的確に相対回転させることができる。 According to the invention of claim 3, the fitting recess includes the plurality of standing uprights to correspond to the fact that the protrusions of the rotation suppressing jig extend radially while standing up the plurality of upstanding plate parts. Since it is formed as a plurality of fitting grooves that fit the plate part, the relative rotation of the body with respect to the rotation suppression jig can be reliably controlled by fitting the plurality of upright plate parts and the plurality of fitting grooves. In assembling the body and the plunger, the body and the plunger can be accurately rotated relative to each other.
　請求項４に係る発明によれば、ボディが、一端及び他端が開口されたものとされ、複数の嵌合溝が、ボディの他端開口を区画する周縁部端面において形成されていることから、複数の嵌合溝を、機械式ラッシュアジャスタにおけるボディとして一般的に使用されている通常の筒体（両端が開口されているものの、使用時に、ばね座面プレートをボディ他端側に取付けるもの）に簡単に適用できる。 According to the invention of claim 4, the body has one end and the other end opened, and the plurality of fitting grooves are formed on the end surface of the peripheral edge that defines the other end opening of the body. , A plurality of fitting grooves, a normal cylinder generally used as a body in a mechanical lash adjuster (both ends are open, but when used, a spring seat plate is attached to the other end of the body ) Easy to apply.
　また、ボディの他端面に開口が形成され、複数の嵌合溝が、その開口を区画する周縁部端面においてのみ形成されていることから、嵌合溝の加工負担を極力抑えることができる。 In addition, since the opening is formed on the other end surface of the body and the plurality of fitting grooves are formed only on the end surface of the peripheral edge that defines the opening, the processing load of the fitting groove can be suppressed as much as possible.
　請求項５に係る発明によれば、プランジャの先端部外周面に、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されていることから、組付け時にプランジャを搬送するプランジャ用搬送具が一対の把持面を把持したときには、プランジャ用搬送具とプランジャとが相対回転することを確実に規制することができ、ボディとプランジャとの組付けに際し、ボディとプランジャとを的確に相対回転させることができる。 According to the fifth aspect of the present invention, the pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger. When the transporting device for the plunger to be transported grips the pair of gripping surfaces, relative rotation of the transporting device for the plunger and the plunger can be reliably controlled. When the body and the plunger are assembled, Can be accurately rotated relative to each other.
　請求項６に係る発明によれば、プランジャの先端部外周面に、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されていることから、組付け時にプランジャを搬送するプランジャ用搬送具が一対の把持面を把持したときには、プランジャ用搬送具とプランジャとが相対回転することを確実に規制することができ、ボディとプランジャとの組付けに際し、ボディとプランジャとを的確に相対回転させることができる。 According to the invention of claim 6, since the pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger, When the transporting device for the plunger to be transported grips the pair of gripping surfaces, relative rotation of the transporting device for the plunger and the plunger can be reliably controlled. When the body and the plunger are assembled, Can be accurately rotated relative to each other.
　本発明（請求項７に係る発明）によれば、平面視非円形形状を示す突部又は凹部の一方が備えられる回転抑制治具と、前記ボディとして、該ボディの他端面に、前記回転抑制治具の突部又は凹部の一方に対応して、その一方を嵌合するための他方が形成されているものと、前記プランジャとして、該プランジャの先端部の横断面形状が非円形形状に形成されたものと、前記付勢手段と、を用意し、
　先ず、ボディ用搬送具を利用することにより、前記回転抑制治具の上方側から該回転抑制治具の突部又は凹部の一方上に前記ボディの他端面を載置し、次に、プランジャ用搬送具を利用することにより、前記プランジャを、該プランジャの先端部を把持した状態で該プランジャの基端部が前記ボディの一端開口に入り込むように搬送すると共に、該プランジャの基端部が該ボディの一端開口に入り込むように搬送されるときまでに該ボディ内に前記付勢手段を収納し、次に、前記プランジャ用搬送具による前記プランジャ先端部の把持状態を維持しつつ該プランジャ用搬送具又は前記回転抑制治具のうちの一方を回転させて、該回転抑制治具の突部又は凹部の一方が該ボディ他端面における突部又は凹部の他方に嵌合した状態の下で、該プランジャの外周面と該ボディの内周面とを相対回転させることから、前述の請求項１に係る機械式ラッシュアジャスタを自動化の下で製造する（組付ける）ことができ、その製造において、プランジャとボディとを、極力、的確且つ迅速に組付けることができる。 According to the present invention (the invention according to claim 7), the rotation suppression jig provided with one of a projection or a recess having a non-circular shape in plan view, and the rotation suppression jig on the other end surface of the body as the body. Corresponding to one of the protrusions or recesses of the jig, the other for fitting one is formed, and as the plunger, the cross-sectional shape of the tip of the plunger is formed in a non-circular shape Prepared and the biasing means,
First, the other end surface of the body is placed on one of the protrusion or recess of the rotation suppression jig from the upper side of the rotation suppression jig by using a body transport tool, and then the plunger By utilizing the transport tool, the plunger is transported so that the proximal end portion of the plunger enters the one end opening of the body in a state where the distal end portion of the plunger is gripped, and the proximal end portion of the plunger is The biasing means is housed in the body by the time it is transported so as to enter the one end opening of the body, and then the plunger transport is maintained while the plunger tip is held by the plunger transport tool. One of the tool or the rotation suppression jig is rotated, and one of the protrusions or recesses of the rotation suppression jig is fitted to the other of the protrusions or recesses on the other end surface of the body, Plastic Since the outer peripheral surface of the jar and the inner peripheral surface of the body are rotated relative to each other, the mechanical lash adjuster according to claim 1 can be manufactured (assembled) under automation. And body can be assembled as accurately and quickly as possible.
　請求項８に係る発明によれば、回転抑制治具として、平面視非円形形状の突部を備えるものを用い、ボディとして、該ボディの他端面に、突部を嵌合するための嵌合凹部を備えるものを用いることから、前述の請求項２に係る機械式ラッシュアジャスタを製造することができる。 According to the invention according to claim 8, a rotation suppression jig having a non-circular projection in plan view is used, and as a body, fitting for fitting the projection to the other end surface of the body Since what uses a recessed part is used, the mechanical lash adjuster which concerns on the above-mentioned Claim 2 can be manufactured.
　請求項９に係る発明によれば、回転抑制治具の突部として、複数の起立板部を起立させつつ放射状に伸びている構造のものを用い、ボディ他端面の嵌合凹部として、複数の起立板部に対応して該複数の起立板部を嵌合する複数の嵌合溝とされたものを用いることから、前述の請求項３に係る機械式ラッシュアジャスタを製造することができる。 According to the invention which concerns on Claim 9, as a protrusion of a rotation suppression jig, the thing of the structure extended radially while raising several standing plate part is used, As several fitting recessed parts of a body other end surface, several The mechanical lash adjuster according to the third aspect of the present invention can be manufactured by using a plurality of fitting grooves for fitting the plurality of standing plate portions corresponding to the standing plate portions.
　請求項１０に係る発明によれば、ボディとして、一端及び他端が開口されていると共に、複数の嵌合溝が、ボディの他端開口を区画する周縁部端面において形成されているものを用いることから、前述の請求項４に係る機械式ラッシュアジャスタを製造することができる。 According to the invention which concerns on Claim 10, while having one end and the other end opened as a body, the some fitting groove is formed in the peripheral part end surface which divides the other end opening of a body is used. Therefore, the mechanical lash adjuster according to the above-described fourth aspect can be manufactured.
　請求項１１に係る発明によれば、プランジャとして、該プランジャの先端部外周面において、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されているものを用いることから、前述の請求項５に係る機械式ラッシュアジャスタを製造することができる。 According to the invention of claim 11, as the plunger, a plunger formed with a pair of gripping surfaces forming a flat surface facing each other in the radial direction of the plunger is used on the outer peripheral surface of the distal end portion of the plunger. Thus, the mechanical lash adjuster according to the above-mentioned claim 5 can be manufactured.
　請求項１２に係る発明によれば、プランジャとして、該プランジャの先端部外周面において、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されているものを用いることから、前述の請求項６に係る機械式ラッシュアジャスタを製造することができる。 According to the invention which concerns on Claim 12, as a plunger, what is formed in the state which the pair of holding surface which makes | forms a flat surface in the outer peripheral surface of the front-end | tip part has opposed in the radial direction of this plunger is used. From the above, the mechanical lash adjuster according to the sixth aspect of the present invention can be manufactured.
　請求項１３に係る発明によれば、回転抑制治具として、回転抑制治具の内部にボディを上方から降下させることができる有底筒体であって、その有底筒体の底部内面に前記複数の起立板部が形成されたものを用いることから、ボディを、その他端面側から有底筒体状の回転抑制治具内に降下させた際に、仮に、ボディ他端面の複数の嵌合溝に回転抑制治具の複数の起立板部が嵌合せずに、該ボディ他端面が複数の起立板部上に載ったとしても、この後、プランジャの基端面がボディの一端開口に入り込むようにした状態で、プランジャ用搬送具又は回転抑制治具のうちの一方を回転させれば、ボディ他端面の複数の嵌合溝に回転抑制治具の複数の起立板部を確実に入り込ませることができ、以後、プランジャの外周面と該ボディの内周面とを相対回転させることができる。このため、ボディを搬送するために用いる組付け装置のボディ用搬送具としては、ボディを把持して有底筒体状の回転抑制治具に搬送し、そのボディを回転抑制治具内に降下ないしは挿入できるものであればよく、ボディ他端面の複数の嵌合溝を回転抑制治具の複数の起立板部に嵌合させる機能まで持たせる必要はなくなる。この結果、構成の簡素化を図り、組付けの自動化を図る観点から好ましいものにできる。 According to the invention of claim 13, as a rotation suppression jig, a bottomed cylinder capable of lowering the body from above into the rotation suppression jig, the bottom inner surface of the bottomed cylinder being Since a plurality of upright plate parts are used, when the body is lowered from the other end face side into the bottomed cylindrical rotation restraining jig, a plurality of fittings on the other end face of the body are assumed. Even if the plurality of upright plate portions of the rotation suppressing jig are not fitted into the groove and the other end surface of the body is placed on the plurality of upright plate portions, the base end surface of the plunger enters the one end opening of the body thereafter. In this state, if one of the plunger transporter or the rotation suppression jig is rotated, the plurality of upright plate portions of the rotation suppression jig can be surely inserted into the plurality of fitting grooves on the other end surface of the body. Thereafter, the outer peripheral surface of the plunger and the inner peripheral surface of the body It can be relatively rotated. For this reason, as a body transport tool for an assembly apparatus used for transporting the body, the body is gripped and transported to a bottomed cylindrical rotation restraining jig, and the body is lowered into the rotation restraining jig. Or what is necessary is just to be able to insert, and it becomes unnecessary to provide the function which makes the some fitting groove of the other end surface of a body fit to the some standing board part of a rotation suppression jig | tool. As a result, it is possible to simplify the configuration and make it preferable from the viewpoint of automating the assembly.
　請求項１４に係る発明によれば、プランジャをボディに搬送するに先立ち、該プランジャの先端部外周に拡縮可能な止め輪を嵌め込むと共に、該プランジャ先端部のうち、止め輪よりも先端部分を前記プランジャ用搬送具により把持し、その上で、プランジャ外周面とボディ内周面とを相対回転させて該プランジャを該ボディ内に進入させるに伴い、プランジャ用搬送具をもって止め輪をボディの開口周縁部内に押し込んで該止め輪を該ボディの開口内周縁部に保持させることから、プランジャ用搬送具を、プランジャ先端部に対する把持状態（姿勢）からそのままボディ開口周縁部内への止め輪の押し込み状態に移行させることができ、止め輪をボディの開口内周面に保持させることに関し、プランジャ用搬送具を有効に利用できる。 According to the fourteenth aspect of the present invention, before the plunger is transported to the body, a snap ring that can be expanded and contracted is fitted on the outer periphery of the tip of the plunger, and the tip of the plunger tip is positioned more than the retaining ring. The retaining ring is held by the plunger carrier as the plunger is gripped by the plunger carrier, and the plunger outer peripheral surface and the body inner peripheral surface are rotated relative to each other to move the plunger into the body. The retaining ring is pushed into the peripheral edge of the body, and the retaining ring is held at the inner peripheral edge of the opening of the body. Therefore, the retaining ring is pushed into the peripheral edge of the body opening from the gripping state (posture) of the plunger tip. The plunger conveying tool can be effectively used for holding the retaining ring on the inner peripheral surface of the opening of the body.
　請求項１５に係る発明によれば、プランジャ外周面とボディ内周面とを相対回転させて該プランジャ外周面と該ボディ内周面とを所定の螺合状態とするに際し、回転抑制治具を作業面に対して固定する一方、プランジャ用搬送具によってプランジャに対して回転力を付与することから、プランジャとボディとを所定の螺合状態とするために該プランジャと該ボディとを具体的態様をもって的確に相対回転させることができる。 According to the invention of claim 15, when the plunger outer peripheral surface and the body inner peripheral surface are relatively rotated to bring the plunger outer peripheral surface and the body inner peripheral surface into a predetermined screwed state, Since the rotation force is applied to the plunger by the plunger conveying tool while the plunger and the body are fixed to the work surface, the plunger and the body are in a specific mode in order to be in a predetermined screwed state. The relative rotation can be accurately performed.
　請求項１６に係る発明によれば、作業面を、ターンテーブルの上面により構成し、回転抑制治具として、複数の回転抑制治具を用意し、複数の回転抑制治具を、ターンテーブルの上面に該ターンテーブルの周方向に所定間隔をあけて固定し、ターンテーブルの回転駆動により、各回転抑制治具を、各組付け工程に順次、移行させることから、ターンテーブル上の複数の回転抑制治具を利用して、プランジャとボックスとの組付けを順次、行うことができる。このため、当該機械式ラッシュアジャスタの量産化を図る上で、好ましい製造方法を提供できる。 According to the invention of claim 16, the work surface is constituted by the upper surface of the turntable, a plurality of rotation suppression jigs are prepared as the rotation suppression jig, and the plurality of rotation suppression jigs are connected to the upper surface of the turntable. The turntable is fixed at a predetermined interval in the circumferential direction of the turntable, and the rotation control of the turntable shifts each rotation suppression jig to each assembling step in sequence. Assembling of the plunger and the box can be performed sequentially using a jig. For this reason, when mass production of the said mechanical lash adjuster is aimed at, a preferable manufacturing method can be provided.
　請求項１７に係る発明によれば、プランジャ外周面とボディ内周面とを相対回転させて該プランジャ外周面と該ボディ内周面とを所定の螺合状態とするに際し、プランジャ用搬送具によってプランジャの先端部を把持することにより、プランジャを非回転状態に保持する一方、回転抑制治具によってボディに対して回転力を付与することにより、プランジャとボディとを相対回転させることから、プランジャとボディとを所定の螺合状態とするために該プランジャと該ボディとを具体的態様をもって的確に相対回転させることができる。 According to the invention of claim 17, when the plunger outer peripheral surface and the body inner peripheral surface are relatively rotated to bring the plunger outer peripheral surface and the body inner peripheral surface into a predetermined screwed state, While holding the plunger in a non-rotating state by gripping the tip of the plunger, the plunger and the body are relatively rotated by applying a rotational force to the body by the rotation suppression jig. In order to bring the body into a predetermined screwed state, the plunger and the body can be accurately rotated in a specific manner.
第１実施形態に係る油圧式ラッシュアジャスタが組み込まれた動弁機構を示す縦断面図。1 is a longitudinal sectional view showing a valve operating mechanism in which a hydraulic lash adjuster according to a first embodiment is incorporated. 第１実施形態に係る油圧式ラッシュアジャスタを示す斜視図。The perspective view which shows the hydraulic lash adjuster which concerns on 1st Embodiment. 第１実施形態に係る油圧式ラッシュアジャスタを示す底面図。The bottom view which shows the hydraulic lash adjuster which concerns on 1st Embodiment. 第１実施形態に係る油圧式ラッシュアジャスタを示す縦断面図。1 is a longitudinal sectional view showing a hydraulic lash adjuster according to a first embodiment. 組付けに用いられるボディの準備を説明する説明図。具体的には、図５（ａ）は、筒状ボディの軸線方向他端部にばね座面プレートをＣリングにより取付ける内容を示す図、図５（ｂ）は、ばね座面プレートの取付け後、プランジャスプリングをボディ内に収納する内容を示す図、図５（ｃ）は、組付け準備が終了したボディを示す図。Explanatory drawing explaining the preparation of the body used for an assembly | attachment. Specifically, FIG. 5 (a) is a diagram showing the contents of attaching the spring seat plate to the other end in the axial direction of the cylindrical body with the C-ring, and FIG. 5 (b) is a view after the spring seat plate is attached. The figure which shows the content which accommodates a plunger spring in a body, FIG.5 (c) is a figure which shows the body which the assembly preparation completed. 組付けに用いられるプランジャの準備を説明する説明図。具体的には、図６（ａ）は、プランジャの先端部外周面に止め輪を嵌合する内容を示す図、図６（ｂ）は、組付け準備が終了したプランジャを示す図。Explanatory drawing explaining the preparation of the plunger used for an assembly | attachment. Specifically, FIG. 6A is a diagram showing the contents of fitting a retaining ring on the outer peripheral surface of the distal end portion of the plunger, and FIG. 6B is a diagram showing the plunger that has been prepared for assembly. 第１実施形態に係る回転抑制治具を説明する一部破断斜視図。The partially broken perspective view explaining the rotation suppression jig | tool which concerns on 1st Embodiment. 第１実施形態に係る回転抑制治具を示す平面図。The top view which shows the rotation suppression jig | tool which concerns on 1st Embodiment. 量産に好ましい組付け例を説明する説明図。Explanatory drawing explaining the example of assembly | attachment preferable for mass production. プランジャとボックスとの組付けを説明する説明図。具体的には、図１０（ａ）は、回転抑制治具内へのボディの挿入を示す図、図１０（ｂ）は、回転抑制治具内にボディが挿入された状態を示す図、図１０（ｃ）は、回転抑制治具内に挿入されたボディに対するプランジャの搬送を示す図、図１０（ｄ）は、回転抑制治具内に挿入されたボディに対するプランジャの相対回転（螺合）を示す図、図１０（ｅ）は、回転抑制治具内に挿入されたボディに対してプランジャが所定の螺合状態に至ったことを示す図。Explanatory drawing explaining the assembly | attachment of a plunger and a box. Specifically, FIG. 10A is a diagram illustrating insertion of a body into the rotation suppression jig, and FIG. 10B is a diagram illustrating a state in which the body is inserted into the rotation suppression jig. 10 (c) is a diagram illustrating conveyance of the plunger with respect to the body inserted into the rotation suppression jig, and FIG. 10 (d) is a relative rotation (screwing) of the plunger with respect to the body inserted into the rotation suppression jig. FIG. 10E is a diagram showing that the plunger has reached a predetermined screwed state with respect to the body inserted into the rotation suppressing jig. プランジャとボックスとの組付け時における嵌合溝と起立板部との関係を模式的に示す説明図。具体的には、図１１（ａ）～図１１（ｅ）は、図１０（ａ）～図１０（ｅ）に対応した状態における嵌合溝と起立板部との関係を示す図。Explanatory drawing which shows typically the relationship between the fitting groove at the time of the assembly | attachment of a plunger and a box, and an upright board part. Specifically, FIGS. 11 (a) to 11 (e) are views showing the relationship between the fitting groove and the upright plate portion in a state corresponding to FIGS. 10 (a) to 10 (e). 第１実施形態に係るボックス及びプランジャの搬送経路を説明する説明図。Explanatory drawing explaining the conveyance path | route of the box which concerns on 1st Embodiment, and a plunger. プランジャを把持するプランジャ用搬送具を説明する説明図。Explanatory drawing explaining the conveyance tool for plungers which hold | grip a plunger. プランジャ用搬送具における一対の把持爪を説明する説明図。Explanatory drawing explaining a pair of holding nail | claw in the conveyance tool for plungers. 第２実施形態に係る回転抑制治具を説明する説明図。Explanatory drawing explaining the rotation suppression jig | tool which concerns on 2nd Embodiment.
　以下、本発明の実施形態について、図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１において、符号１は、内燃機関の動弁機構を示す。この動弁機構１は、燃焼室に連なる吸気ポート（又は排気ポート）８を開閉する機構として、吸気ポート（又は排気ポート）８を開閉する吸気バルブ又は排気バルブ（以下、バルブという）２と、回転駆動されるカム３と、バルブ２とカム３との間に配置されてカム３の回転駆動力により揺動されるロッカアーム４と、支点としてロッカアーム４を支持する機械式ラッシュアジャスタ５と、を備えている。 In FIG. 1, reference numeral 1 denotes a valve mechanism of an internal combustion engine. The valve mechanism 1 is an intake or exhaust valve (hereinafter referred to as a valve) 2 for opening and closing an intake port (or exhaust port) 8 as a mechanism for opening and closing an intake port (or exhaust port) 8 connected to a combustion chamber. A cam 3 that is rotationally driven, a rocker arm 4 that is disposed between the valve 2 and the cam 3 and is rocked by the rotational driving force of the cam 3, and a mechanical lash adjuster 5 that supports the rocker arm 4 as a fulcrum. I have.
　前記バルブ２は、既知の如く、バルブステム６を一体的に備えており、そのバルブステム６は、エンジンのシリンダヘッド７に形成された吸気ポート（又は排気ポート）８に連なる貫通孔９内に摺動自在に挿通されている。バルブステム６の外周にはバルブスプリング１０が、遊嵌状態をもって巻回されており、そのバルブスプリング１０は、シリンダヘッド７とバルブステム６の上部に固定されたリテーナ１１との間に装着されて、バルブ２を吸気ポート（又は排気ポート）８の開口を閉弁する方向に付勢している。 As is known, the valve 2 is integrally provided with a valve stem 6, and the valve stem 6 is inserted into a through-hole 9 connected to an intake port (or exhaust port) 8 formed in a cylinder head 7 of the engine. It is slidably inserted. A valve spring 10 is wound around the outer periphery of the valve stem 6 with a loose fit. The valve spring 10 is mounted between a cylinder head 7 and a retainer 11 fixed to the upper portion of the valve stem 6. The valve 2 is urged in a direction to close the opening of the intake port (or exhaust port) 8.
　前記カム３は、自動車用エンジンの回転に同期して回転駆動されるカムシャフト１２に固定されており、カム３は、カムシャフト１２の回転に伴い回転駆動される。 The cam 3 is fixed to a camshaft 12 that is driven to rotate in synchronization with the rotation of the automobile engine, and the cam 3 is driven to rotate as the camshaft 12 rotates.
　前記ロッカアーム４は、カム３の回転駆動に基づく揺動により、そのカム３の回転駆動力をバルブステム６に伝達することになっており、バルブステム６は、そのロッカアーム４の揺動に応じて、貫通孔９を摺動することになっている。これにより、バルブ２は、バルブステム６の摺動に応じて、吸気ポート（又は排気ポート）８を開閉することになる。 The rocker arm 4 transmits the rotational driving force of the cam 3 to the valve stem 6 by swinging based on the rotational drive of the cam 3, and the valve stem 6 responds to the swing of the rocker arm 4. The through hole 9 is slid. Thus, the valve 2 opens and closes the intake port (or exhaust port) 8 in accordance with the sliding of the valve stem 6.
　前記機械式ラッシュアジャスタ５は、支点としてロッカアーム４を支持するべく、図１に示すように、ボディ１３内にプランジャ１４が摺動可能に嵌合された構造とされている。 The mechanical lash adjuster 5 has a structure in which a plunger 14 is slidably fitted in a body 13 as shown in FIG. 1 so as to support the rocker arm 4 as a fulcrum.
　ボディ１３は、図１～図４に示すように、シリンダヘッド７の上部側に形成された平面視円形状の凹部１５内に収納されている。ボディ１３は、凹部１５に対応して、略円筒形状に形成されており、そのボディ１３は、その軸線方向一端部を凹部１５開口から外方に若干、突出させた状態で、その軸線方向一端部よりも軸線方向他端側部分を凹部１５内に収納している。このため、ボディ１３における軸線方向一端面（以下、一端面という）１３ａの開口１３ａａが凹部１５外方に開口し、ボディ１３の軸線方向他端面（以下、他端面という）１３ｂが凹部１５内底面に臨むことになっている。 As shown in FIGS. 1 to 4, the body 13 is housed in a circular recess 15 formed on the upper side of the cylinder head 7 in plan view. The body 13 is formed in a substantially cylindrical shape corresponding to the recess 15, and the body 13 has one end in the axial direction in a state in which one end in the axial direction slightly protrudes outward from the opening of the recess 15. The other end portion in the axial direction than the portion is accommodated in the recess 15. For this reason, the opening 13aa of one end surface (hereinafter referred to as one end surface) 13a in the body 13 opens to the outside of the recess 15 and the other end surface in the axial direction (hereinafter referred to as the other end surface) 13b of the body 13 is the bottom surface in the recess 15. Is supposed to face.
　このボディ１３の他端面１３ｂには、図２～図４に示すように、複数の嵌合溝１６が形成されている。この複数の嵌合溝１６は、ボディ１３の軸線ＯＢを中心として放射状に伸びているが、前述のように、ボディ１３の他端面１３ｂに開口１３ｂａを有していることから、本実施形態においては、複数の嵌合溝１６は、その開口１３ｂａにおいては存在せず、その開口１３ｂａを区画する周縁部端面１３ｂｂにおいてのみ存在することになっている。このため、各嵌合溝１６は、溝幅方向を周縁部端面１３ｂｂの周方向に向けつつ溝伸び方向を該周縁部端面１３ｂｂの肉厚方向に向けている。この複数の嵌合溝１６は、より具体的には、４つの嵌合溝１６として形成されている。このため、この各嵌合溝１６は、ボディ１３の周縁部端面１３ｂｂの周方向に等角度（９０度）毎に配置されている。 A plurality of fitting grooves 16 are formed on the other end surface 13b of the body 13 as shown in FIGS. The plurality of fitting grooves 16 extend radially about the axis OB of the body 13, but as described above, the other end surface 13b of the body 13 has the opening 13ba. The plurality of fitting grooves 16 do not exist in the opening 13ba, but exist only in the peripheral edge surface 13bb that defines the opening 13ba. Therefore, each fitting groove 16 has a groove extending direction in a thickness direction of the peripheral edge surface 13bb while a groove width direction is directed in a circumferential direction of the peripheral edge surface 13bb. More specifically, the plurality of fitting grooves 16 are formed as four fitting grooves 16. For this reason, each of the fitting grooves 16 is arranged at equal angles (90 degrees) in the circumferential direction of the peripheral edge surface 13bb of the body 13.
　このボディ１３の内周面には、図４に示すように、その軸線方向全長に亘って雌ねじ１７が形成されている。この雌ねじ１７は、後述のプランジャ１４における雄ねじ１８と協働してねじ係合部１９（図４参照）を構成することになっている。 As shown in FIG. 4, a female thread 17 is formed on the inner peripheral surface of the body 13 over the entire length in the axial direction. The female screw 17 constitutes a screw engaging portion 19 (see FIG. 4) in cooperation with a male screw 18 in the plunger 14 described later.
　また、このボディ１３の内周面には、その軸線方向他端側開口内周縁部及び軸線方向一端側開口内周縁部において、保持溝２０，２１がそれぞれ形成されている。保持溝２０には、拡縮可能な止め具として、いわゆるＣリング（Ｃ形止め輪）２２が嵌め込まれ、そのＣリング２２上（ボディ１３内周面から径方向内方に突出した部分）にばね座面プレート２３が着座されており、このばね座面プレート２３により、ボディ１３における他端側開口１３ｂａは、若干、軸線方向内方側において閉塞されている。保持溝２１には、止め具として、拡縮可能な止め輪２４（例えば、いわゆるＣリング）が嵌合されており、この止め輪２４により後述のプランジャ１４の抜け止めが図られる。 Further, holding grooves 20 and 21 are formed on the inner peripheral surface of the body 13 at the inner peripheral edge of the opening on the other end side in the axial direction and the inner peripheral edge of the opening on the one end side in the axial direction. A so-called C-ring (C-shaped retaining ring) 22 is fitted in the holding groove 20 as an expandable / contractible stopper, and a spring is formed on the C-ring 22 (a portion protruding radially inward from the inner peripheral surface of the body 13). The seat surface plate 23 is seated, and the other end side opening 13ba in the body 13 is slightly blocked on the inner side in the axial direction by the spring seat surface plate 23. A retaining ring 24 (for example, a so-called C ring) that can be expanded and contracted is fitted in the holding groove 21 as a stopper, and the retaining ring 24 prevents the plunger 14 described later from coming off.
　前記プランジャ１４には、図１、図２、図４に示すように、棒状部材が用いられている。このプランジャ１４は、その軸線方向一方側をなす先端部２５と、その先端部２５よりも軸線方向他方側において先端部２５よりも多少、拡径された状態で伸びる円筒状の本体部２６と、をもって構成されており、そのプランジャ１４は、本体部２６をボディ１３内進入させた状態で、先端部２５をボディ１３における一端面１３ａの開口１３ａａから外方に突出させている。このプランジャ１４には、先端部２５外周面と本体部２６外周面との間において段部２７が形成されており、プランジャ１４の移動（ボディ１３の軸線方向への移動）に伴うその段部２７の移動領域には、プランジャ１の抜け止めを図るべく、前記止め輪２４が臨んでいる。 As the plunger 14, a rod-like member is used as shown in FIGS. The plunger 14 has a distal end portion 25 that is on one side in the axial direction, a cylindrical main body portion 26 that extends in a slightly larger diameter than the distal end portion 25 on the other axial side of the distal end portion 25, and The plunger 14 protrudes outward from the opening 13aa of the one end surface 13a of the body 13 in a state where the main body portion 26 has entered the body 13. The plunger 14 is formed with a step portion 27 between the outer peripheral surface of the tip portion 25 and the outer peripheral surface of the main body portion 26, and the step portion 27 accompanying the movement of the plunger 14 (movement of the body 13 in the axial direction). In order to prevent the plunger 1 from coming off, the retaining ring 24 faces the moving region.
　プランジャ１４における先端部２５の先端面は、図１に示すように、略半球状に膨らむように形成されている。このプランジャ１４における略半球状の先端面に対応して、ロッカアーム４には、そのプランジャ１４との当接面において、略半球状の凹部２８が形成されていると共に、その凹部２８内と外部とを連通させる連通路２９と、が形成されており、プランジャ１４の先端部２５は、ロッカアーム４の支点としてそのロッカアーム４の凹部２８を受け止めている。 The distal end surface of the distal end portion 25 of the plunger 14 is formed so as to swell in a substantially hemispherical shape as shown in FIG. Corresponding to the substantially hemispherical tip surface of the plunger 14, the rocker arm 4 has a substantially hemispherical recess 28 formed on the contact surface with the plunger 14, and the inside and outside of the recess 28. And a communication passage 29 for communicating with each other, and the distal end portion 25 of the plunger 14 receives the concave portion 28 of the rocker arm 4 as a fulcrum of the rocker arm 4.
　しかもこのプランジャ１４における先端部２５の外周面には、図２、図４に示すように、一対の把持面２５Ａが形成されている。この一対の把持面２５Ａは、プランジャ１４の径方向において対向した状態で配置されており、この先端部２５部分は、一対の把持面２５Ａに基づき横断面形状が非円形形状として形成されている。 Moreover, as shown in FIGS. 2 and 4, a pair of gripping surfaces 25 </ b> A is formed on the outer peripheral surface of the distal end portion 25 of the plunger 14. The pair of gripping surfaces 25A are arranged so as to face each other in the radial direction of the plunger 14, and the distal end portion 25 portion is formed in a non-circular cross-sectional shape based on the pair of gripping surfaces 25A.
　プランジャ１４における本体部２６の外周面には、図１、図４に示すように、前記ボディ１３内周面における雌ねじ１７に対応して雄ねじ１８が形成されている。この雄ねじ１８は、本体部２６の軸線方向全長に亘って形成されており、この雄ねじ１８とボディ１３内周面における雌ねじ１７とは、滑り回転してボディ１３の軸線ＯＢ方向（プランジャ１４の軸線ＯＰ方向）に変位動するためのねじ係合部１９を構成することになっている。 As shown in FIGS. 1 and 4, a male screw 18 is formed on the outer peripheral surface of the body portion 26 of the plunger 14 corresponding to the female screw 17 on the inner peripheral surface of the body 13. The male screw 18 is formed over the entire length in the axial direction of the main body portion 26. The male screw 18 and the female screw 17 on the inner peripheral surface of the body 13 slide and rotate to rotate in the axis OB direction of the body 13 (the axis of the plunger 14). A screw engaging portion 19 for displacement movement in the OP direction) is to be configured.
　プランジャ１４における本体部２６の内部には、図１、図４に示すように、ばね収納空間３０と連通孔３１とが形成されている。ばね収納空間３０は、本体部２６内部にその本体部２６の軸線方向略全長に亘って形成されており、そのばね収納空間３０は、本体部２６の基端面２６ａ（プランジャ１４の軸線方向他方側面）から前記ばね座面プレート２３に向けて開口されている。連通孔２１は、ボディ１３内に進入したオイルの排出を可能とすべく、プランジャ先端部２５内部に形成されており、その連通孔２１の一端はばね収納空間３０内に開口され、その他端はプランジャ先端部２５の先端面からロッカアーム４の凹部２８内（連通路２９）に開口されている。 As shown in FIGS. 1 and 4, a spring housing space 30 and a communication hole 31 are formed inside the main body 26 of the plunger 14. The spring storage space 30 is formed in the main body portion 26 over substantially the entire length in the axial direction of the main body portion 26, and the spring storage space 30 is the base end surface 26 a of the main body portion 26 (the other side surface in the axial direction of the plunger 14). ) To the spring seat plate 23. The communication hole 21 is formed inside the plunger tip 25 so as to allow the oil that has entered the body 13 to be discharged. One end of the communication hole 21 is opened in the spring housing space 30 and the other end is formed. An opening is formed in the recess 28 (communication path 29) of the rocker arm 4 from the distal end surface of the plunger distal end portion 25.
　前記ばね収納空間３０には、図１、図４に示すように、プランジャスプリング３２が収納されている。プランジャスプリング３２は、ばね収納空間３０の内部底面と前記ばね座面プレート２３との間に介装されており、このプランジャスプリング３２により、プランジャ１４はボディ１３に対して伸長方向に付勢されている。 In the spring accommodating space 30, a plunger spring 32 is accommodated as shown in FIGS. The plunger spring 32 is interposed between the inner bottom surface of the spring housing space 30 and the spring seat plate 23, and the plunger 14 is urged in the extending direction by the plunger spring 32. Yes.
　このような機械式ラッシュアジャスタ５が動弁機構１において使用されると、プランジャ１４に対するロッカアーム４による荷重状態に応じて、プランジャ１４が、プランジャ１４とボディ１３とがねじ係合部１９で滑り回転することにより、伸長動又は短縮動することになる。その一方、プランジャ先端部２５とロッカアーム４との間の摩擦トルク、プランジャ１４とプランジャスプリング３２との摩擦トルクの総和が、プランジャ１４に作用する荷重によってねじ係合部１９を滑り回転させる推力トルクを上回った場合には、ねじ係合部１９の滑り回転が抑制されることにより、そのねじ係合部１９が不動となり、プランジャ１４が、ロッカアーム４の揺動支点として機能する。このような機械式ラッシュアジャスタ５の駆動（伸縮動作）により、カム３とロッカアーム４とのバルブクリアランスが自動調整される。 When such a mechanical lash adjuster 5 is used in the valve operating mechanism 1, the plunger 14 slides and rotates between the plunger 14 and the body 13 at the screw engaging portion 19 according to the load state of the rocker arm 4 with respect to the plunger 14. By doing so, it is extended or shortened. On the other hand, the sum of the friction torque between the plunger tip portion 25 and the rocker arm 4 and the friction torque between the plunger 14 and the plunger spring 32 is a thrust torque that causes the screw engagement portion 19 to slide and rotate by a load acting on the plunger 14. In the case of exceeding, the sliding rotation of the screw engaging portion 19 is suppressed, so that the screw engaging portion 19 becomes immobile, and the plunger 14 functions as a rocking fulcrum of the rocker arm 4. The valve clearance between the cam 3 and the rocker arm 4 is automatically adjusted by driving (extending / contracting) the mechanical lash adjuster 5 as described above.
　ところで、このような機械式ラッシュアジャスタ５は、使用前に（動弁機構１に組込む前に）、組付け状態として、ボディ１３内にプランジャスプリング３２を収納した上で、ボディ１３内周面における雌ねじ１７にプランジャ１４外周面における雄ねじ１８を螺合させて、プランジャ１４（本体部２６）をボディ１３内に進入させた状態にしておかなければならない。このため、ボディ１３とプランジャ１４とを組付けるために、組付け装置を用いることにより自動化が図られている。 By the way, such a mechanical lash adjuster 5 is assembled on the inner peripheral surface of the body 13 after the plunger spring 32 is accommodated in the body 13 before being used (before being assembled into the valve mechanism 1). The male screw 18 on the outer peripheral surface of the plunger 14 is screwed into the female screw 17 so that the plunger 14 (main body portion 26) enters the body 13. For this reason, in order to assemble the body 13 and the plunger 14, automation is achieved by using an assembling apparatus.
　ボディ１３とプランジャ１４との組付けについて、具体的に説明する。 The assembly of the body 13 and the plunger 14 will be specifically described.
　この両者１３，１４の組付けにおいては、その組付けに先立ち、前述の機械式ラッシュアジャスタ５の構成部品であるボディ１３、プランジャ１４、さらには、回転抑制治具３３が用意される。 In assembling both the parts 13 and 14, the body 13, the plunger 14, and further the rotation restraining jig 33, which are components of the mechanical lash adjuster 5 described above, are prepared prior to the assembly.
　上記ボディ１３は、図５（ａ）に示すように、その軸線方向他端側開口内周縁部において、Ｃリング２２を用いてばね座面プレート２３が予め取付けられており、ボディ１３における他端面１３ｂの開口１３ｂａは閉塞されている(図５（ｂ）（ｃ）参照)。しかも、そのボディ１３内には、ばね座面プレート２３の取付け後、プランジャスプリング３２が収納されている(図５（ｂ）（ｃ）参照)。上記プランジャ１４は、図６（ａ）（ｂ）に示すように、そのプランジャ１４の先端部２５外周面に止め輪２４が予め嵌合されており、その止め輪２４は、一対の把持面２５Ａよりも本体部２６側に位置されている。 As shown in FIG. 5 (a), the body 13 has a spring seat surface plate 23 attached in advance using a C ring 22 at the inner peripheral edge of the opening on the other end side in the axial direction. The opening 13ba of 13b is closed (see FIGS. 5B and 5C). Moreover, a plunger spring 32 is housed in the body 13 after the spring seat plate 23 is attached (see FIGS. 5B and 5C). As shown in FIGS. 6A and 6B, the plunger 14 is fitted with a retaining ring 24 in advance on the outer peripheral surface of the distal end portion 25 of the plunger 14, and the retaining ring 24 has a pair of gripping surfaces 25A. It is located on the main body part 26 side.
　上記回転抑制治具３３は、図７、図８に示すように、円板状の底部３３ａとその底部の周囲から起立する円筒部３３ｂとを一体的に備える有底円筒体をもって形成されている。この回転抑制治具３３（有底円筒体）における内部の大きさは、その開口からボディ１３を挿入でき、しかも、その挿入状態において、ボディ１３が回転抑制治具３３に対して相対回転可能な状態を確保できるものとなっている。この回転抑制治具３３の底部３３ａ内面には、複数の起立板部３４が前記ボディ１３における周縁部端面１３ｂｂの複数の嵌合溝１６に対応して設けられている。各起立板部３４は、回転抑制治具３３の軸線ＯＪを中心として、その各起立板部３４の板面を回転抑制治具３３の周方向に向けつつ放射状に配置されており、本実施形態においては、前述のボディ１３における４つの嵌合溝１６に対応させるべく、４つの起立板部３４が等角度（９０度）毎に配置されている。この各起立板部３４の肉厚は、前記ボディ１３における周縁部端面１３ｂｂ（軸線方向他端面）の各嵌合溝１６の溝幅よりも若干、短くされており、複数の各起立板部３４上に各嵌合溝１６がそれぞれ臨んだ状態でボディ１３が降下されたときには、各起立板部３４が各嵌合溝１６に嵌まり込み、回転抑制治具３３とボディ１３とは相対回転不能状態となる。このような回転抑制治具３３を用いて量産を図る場合には、図９に示すように、回転抑制治具３３をターンテーブル３５上にその周方向において所定間隔毎に配置し、そのターンテーブル３５の移動（回動：図９中、矢印で回動方向を示す）により、各回転抑制治具３３を各組付け工程に順次、移動させることが好ましい。 As shown in FIGS. 7 and 8, the rotation suppression jig 33 is formed with a bottomed cylindrical body integrally including a disc-shaped bottom portion 33 a and a cylindrical portion 33 b erected from the periphery of the bottom portion. . The internal size of the rotation suppression jig 33 (bottomed cylindrical body) is such that the body 13 can be inserted through the opening, and the body 13 can rotate relative to the rotation suppression jig 33 in the inserted state. The state can be secured. A plurality of upright plate portions 34 are provided on the inner surface of the bottom 33 a of the rotation suppressing jig 33 so as to correspond to the plurality of fitting grooves 16 on the peripheral edge surface 13 bb of the body 13. Each of the standing plate portions 34 is arranged radially about the axis OJ of the rotation suppressing jig 33 with the plate surface of each rising plate portion 34 directed in the circumferential direction of the rotation suppressing jig 33. The four upright plate portions 34 are arranged at equal angles (90 degrees) so as to correspond to the four fitting grooves 16 in the body 13 described above. The wall thickness of each upright plate portion 34 is slightly shorter than the groove width of each fitting groove 16 on the peripheral end surface 13bb (the other end surface in the axial direction) of the body 13, and a plurality of upright plate portions 34 are provided. When the body 13 is lowered with the respective fitting grooves 16 facing each other, the upright plate portions 34 are fitted into the respective fitting grooves 16, and the rotation suppressing jig 33 and the body 13 are not relatively rotatable. It becomes a state. In the case of mass production using such a rotation suppression jig 33, as shown in FIG. 9, the rotation suppression jig 33 is arranged on the turntable 35 at predetermined intervals in the circumferential direction, and the turntable It is preferable to move each rotation suppression jig 33 sequentially to each assembly step by moving 35 (rotation: the rotation direction is indicated by an arrow in FIG. 9).
　上記ボディ１３、プランジャ１４及び回転抑制治具３３が用意されると、先ず、図１０（ａ）に示すように、回転抑制治具３３の底部３３ａを作業面３７上に固定した上で、その回転抑制治具３３内にその上方側からボディ１３が挿入される。 When the body 13, the plunger 14 and the rotation suppression jig 33 are prepared, first, as shown in FIG. 10A, after fixing the bottom 33 a of the rotation suppression jig 33 on the work surface 37, The body 13 is inserted into the rotation suppression jig 33 from above.
　この作業には、ボディ１３を把持しつつ搬送可能なボディ用搬送具（図１０（ａ）、図１２では一対の把持爪を図示）３６が用いられるが、ボディ用搬送具３６は、図１０（ａ）、図１２に示すように、ボディ１３を把持して、回転抑制治具３３の上部開口１３ａの上方に搬送し、その状態からボディ１３を降下させ、そのボディ１３をそのボディ１３の軸線ＯＢ方向他端側から回転抑制治具３３内に挿入する（図１０（ｂ）も参照）。 In this operation, a body transport tool (FIG. 10A, FIG. 12 shows a pair of gripping claws) 36 that can be transported while gripping the body 13 is used. (A) As shown in FIG. 12, the body 13 is gripped and conveyed above the upper opening 13 a of the rotation suppressing jig 33, the body 13 is lowered from this state, and the body 13 is moved to the body 13. It inserts into the rotation suppression jig 33 from the other end side in the axis OB direction (see also FIG. 10B).
　このとき、ボディ１３における複数の嵌合溝１６に回転抑制治具３３における複数の起立板部３４が嵌合しても、複数の嵌合溝１６に複数の起立板部３４が嵌合しなくても、いずれの状態であってもよい。ボディ１３を複数の起立板部３４に降下させた直後を示す図１０（ｂ）、図１１（ｂ）においては、ボディ１３の複数の嵌合溝１６に回転抑制治具３３の複数の起立板部３４が嵌合せず、ボディ１３の周縁部端面１３ｂｂが複数の起立板部３４上に載置された状態が示されている。 At this time, even if the plurality of standing plate portions 34 in the rotation suppressing jig 33 are fitted into the plurality of fitting grooves 16 in the body 13, the plurality of standing plate portions 34 are not fitted in the plurality of fitting grooves 16. Or any state. In FIG. 10B and FIG. 11B showing immediately after the body 13 is lowered to the plurality of upright plate portions 34, the plurality of upright plates of the rotation restraining jig 33 are inserted into the plurality of fitting grooves 16 of the body 13. The state where the part 34 does not fit and the peripheral edge part end surface 13bb of the body 13 is placed on the plurality of upright plate parts 34 is shown.
　次に、図１０（ｃ）（ｄ）、図１２に示すように、プランジャ用搬送具３８を利用することにより、プランジャ１４が、その基端面２６ａ側が前記回転抑制治具３３内のボディ１３の一端面開口１３ａａに入り込むように搬送される。 Next, as shown in FIGS. 10 (c), 10 (d) and 12, by using the plunger transport tool 38, the plunger 14 has a base end surface 26 a side of the body 13 in the rotation suppression jig 33. It is conveyed so as to enter the one end face opening 13aa.
　上記プランジャ用搬送具３８は、図１３、図１４に示すように、図示を略すロボットアーム等に取付けられて種々の方向に移動可能とされた本体部３９を備えており、その本体部３９には、モータ４０により回転駆動される回転部４１が備えられている。その回転部４１の下面には、図１３の矢印で示すように、圧縮エア等に基づき接近・離間動可能とされた一対の把持爪４２が備えられており、その一対の各把持爪４２は、回転部４１から垂下する垂下部４３と、その垂下部４３の先端部から相手方部材４２に向けて突出された爪部４４と、を備えている。しかも、その各爪部４４下面には、前記止め輪２４を押圧するための押圧部４５が突出した状態でそれぞれ設けられている。 As shown in FIGS. 13 and 14, the plunger transport tool 38 includes a main body 39 that is attached to a robot arm or the like (not shown) and is movable in various directions. Is provided with a rotating portion 41 that is rotated by a motor 40. As shown by the arrows in FIG. 13, a pair of gripping claws 42 that can move toward and away from each other based on compressed air or the like are provided on the lower surface of the rotating portion 41. A hanging portion 43 that hangs down from the rotating portion 41, and a claw portion 44 that protrudes from the tip of the hanging portion 43 toward the counterpart member 42. Moreover, a pressing portion 45 for pressing the retaining ring 24 is provided on the lower surface of each claw portion 44 in a protruding state.
　このようなプランジャ用搬送具３８は、一対の把持爪４２の爪部４４先端をもってプランジャ先端部２５における一対の把持面２５Ａを把持し、その状態を維持しつつ、プランジャ１４を、その基端面２６ａ側が前記ボディ１３の一端開口に入り込むように搬送する。このとき、一対の爪部４４は、該一対の爪部４４とプランジャ１４との相対回転を規制すべく、プランジャ先端部２５の一対の把持面２５Ａを把持するが、その把持位置は、プランジャ先端部２５外周面に嵌合された止め輪２４よりもプランジャ先端側となり、各爪部４４の押圧部４５の下方領域に止め輪２４が臨むことになる。 The plunger transport tool 38 grips the pair of gripping surfaces 25A of the plunger tip 25 with the tips of the claws 44 of the pair of gripping claws 42, and maintains the state of the plunger 14 while maintaining the base end surface 26a. It conveys so that the side may enter into one end opening of the body 13. At this time, the pair of claws 44 grips the pair of gripping surfaces 25A of the plunger tip 25 in order to restrict the relative rotation between the pair of claws 44 and the plunger 14, and the gripping position of the pair of claws 44 depends on the plunger tip. The retaining ring 24 comes to the distal end side of the plunger with respect to the retaining ring 24 fitted to the outer peripheral surface of the portion 25, and the retaining ring 24 faces the area below the pressing portion 45 of each claw portion 44.
　次に、プランジャ用搬送具３８によりプランジャ１４がその軸線を中心として回転される。 Next, the plunger 14 is rotated about its axis by the plunger conveying tool 38.
　このプランジャ１４の回転により、図１０（ｄ）に示すように、当初、プランジャ１４とボディ１３とが共回りすることになる。これにより、ボディ１３が回転抑制治具３３に対して相対回転し、ボディ１３における周縁部端面１３ｂｂの複数の各嵌合溝１６が複数の各起立板部３４に臨んだときには、図１０（ｅ）、図１１（ｅ）に示すように、その複数の各起立板部３４が複数の各嵌合溝１６に嵌合されることになる。以後、回転抑制治具３３とボディ１３とは相対回転不能状態となり、プランジャ１４のさらなる回転により、プランジャ１４とボディ１３（回転抑制治具３３）とが相対回転することになる。これにより、プランジャ１４外周面の雄ねじ１８とボディ１３内周面の雌ねじ１７とが螺合し始めることになり、プランジャ１４は、ボディ１３内に進入していくことになる。 The rotation of the plunger 14 initially causes the plunger 14 and the body 13 to rotate together as shown in FIG. Thus, when the body 13 rotates relative to the rotation restraining jig 33 and each of the plurality of fitting grooves 16 on the peripheral edge surface 13bb of the body 13 faces each of the plurality of upright plate portions 34, FIG. 11 (e), the plurality of upright plate portions 34 are fitted into the plurality of fitting grooves 16. Thereafter, the rotation suppression jig 33 and the body 13 are in a state where relative rotation is impossible, and the plunger 14 and the body 13 (rotation suppression jig 33) rotate relative to each other by further rotation of the plunger 14. As a result, the male screw 18 on the outer peripheral surface of the plunger 14 and the female screw 17 on the inner peripheral surface of the body 13 start to be screwed together, and the plunger 14 enters the body 13.
　勿論このとき、プランジャ搬送具１４は、プランジャ１４外周面とボディ１３内周面との螺合に基づき、プランジャ１４がボディ１３内に進入するに伴い、下降する。 Of course, at this time, the plunger carrier 14 descends as the plunger 14 enters the body 13 based on the screwing of the outer circumferential surface of the plunger 14 and the inner circumferential surface of the body 13.
　プランジャ１４外周面とボディ１３内周面との螺合に基づきプランジャ１４がボディ１３内に進入していくと、プランジャ先端部２５に嵌合された止め輪２４がボックス１４の開口端面に当接して、プランジャ１４の先端側に移動されようとするが、プランジャ用搬送具３８における一対の把持爪４２の押圧部４５がその止め輪２４を押し返すことになり、これに基づき、止め輪２４は、ボディ１３の開口内周縁部に案内されて一旦、縮径され、その後、その開口内周縁部の保持溝２１に至って再び拡径される。これにより、止め輪２４はボディ１３の保持溝２１に嵌合保持され、以後、プランジャ１４は、止め輪２４により移動が規制されるまでの範囲でボディ１３に対して伸縮動できることになる。 When the plunger 14 enters the body 13 based on the threaded engagement between the outer peripheral surface of the plunger 14 and the inner peripheral surface of the body 13, the retaining ring 24 fitted to the plunger tip 25 comes into contact with the opening end surface of the box 14. Thus, the plunger 14 is about to be moved to the tip end side, but the pressing portions 45 of the pair of gripping claws 42 in the plunger carrier 38 push back the retaining ring 24, and based on this, the retaining ring 24 is The diameter of the body 13 is once reduced by being guided to the inner peripheral edge of the opening, and then reaches the holding groove 21 at the inner peripheral edge of the opening to be expanded again. Accordingly, the retaining ring 24 is fitted and held in the retaining groove 21 of the body 13, and thereafter, the plunger 14 can expand and contract with respect to the body 13 in a range until the movement is restricted by the retaining ring 24.
　止め輪２４がボディ１３の保持溝２１に嵌合保持されると、プランジャ搬送具３８が、プランジャ１４に対する把持を維持したまま上昇されることになり、ボディ１３とプランジャ１４とが組付けられた機械式ラッシュアジャスタ５は回転抑制治具３３から引き出される。そして、その機械式ラッシュアジャスタ５はプランジャ搬送具３８により組付け完成品保管場所に搬送され、プランジャ１４とボディ１３との一連の組付け作業は終了する。 When the retaining ring 24 is fitted and held in the holding groove 21 of the body 13, the plunger transport tool 38 is lifted while maintaining the grip on the plunger 14, and the body 13 and the plunger 14 are assembled. The mechanical lash adjuster 5 is pulled out from the rotation restraining jig 33. Then, the mechanical lash adjuster 5 is transported to the assembled finished product storage place by the plunger transport tool 38, and the series of assembly work of the plunger 14 and the body 13 is completed.
　したがって、第１実施形態においては、回転抑制治具３３における複数の起立板部３４をボディ１３における嵌合溝１６に嵌合させて、回転抑制治具３３とボディ１３とを相対回転不能とすると共に、プランジャ用搬送具３８の一対の把持爪４２にプランジャ先端部２５の一対の把持面２５Ａを把持させて、一対の把持爪４２とプランジャ１４とを相対回転不能としていることから、プランジャ１４にプランジャ用搬送具３８によって回転力を付与して、そのようなボディ１３とプランジャ１４とを螺合させれば、そのプランジャ用搬送具３８による回転力は、ボディ１３内にプランジャスプリング３２が収納されていても、プランジャ１４とボディ１３とを相対回転させるための力として的確に利用される。このため、プランジャ１４外周面における雄ねじ１８とボディ１３内周面における雌ねじ１７とを確実に所定の螺合状態とすることができる。 Therefore, in the first embodiment, the plurality of upright plate portions 34 in the rotation suppression jig 33 are fitted into the fitting grooves 16 in the body 13 so that the rotation suppression jig 33 and the body 13 cannot be relatively rotated. At the same time, the pair of gripping claws 42 of the plunger tip portion 25 are gripped by the pair of gripping claws 42 of the plunger transport tool 38 so that the pair of gripping claws 42 and the plunger 14 are not relatively rotatable. When a rotational force is applied by the plunger transport tool 38 and the body 13 and the plunger 14 are screwed together, the plunger spring 32 is accommodated in the body 13 by the rotational force of the plunger transport tool 38. Even if it is, it is utilized appropriately as a force for rotating the plunger 14 and the body 13 relatively. For this reason, the male screw 18 on the outer peripheral surface of the plunger 14 and the female screw 17 on the inner peripheral surface of the body 13 can be surely brought into a predetermined screwed state.
　また、回転抑制治具３３が有底円筒体により形成され、その回転抑制治具３３内に上方開口からボディ１３を投入さえすれば、回転抑制治具３３がボディ１３を自立保持させることから（図１０（ｂ）、図１２参照）、図１２に示すように、そのボディ１３に対するプランジャ１４の組付けを直ちに開始することができる一方で、ボディ用搬送具３６を直ちに次の作業に移すことができる。このため、プランジャ用搬送具３８によりプランジャ１４を把持すると共に、ボディ用搬送具３６によりボディ１３を把持した状態で、両者１４，１３を所定の螺合状態になるまで組付ける場合に比して、サイクルタイム(１回当たりの組付けに要する組付け時間)を短縮できる。 In addition, the rotation suppression jig 33 is formed of a bottomed cylindrical body, and if the body 13 is inserted into the rotation suppression jig 33 from the upper opening, the rotation suppression jig 33 holds the body 13 in a self-supporting manner ( As shown in FIGS. 10 (b) and 12) and FIG. 12, the assembly of the plunger 14 to the body 13 can be started immediately, while the body transport tool 36 is immediately moved to the next operation. Can do. For this reason, as compared with the case where the plunger 14 is gripped by the plunger transport tool 38 and the body 13 is gripped by the body transport tool 36, both the parts 14 and 13 are assembled until a predetermined screwed state is obtained. , Cycle time (installation time required for one assembly) can be shortened.
　しかも、回転抑制治具３３内にボディ１３がボディ用搬送具３６により降ろされたときに、回転抑制治具３３の複数の起立板部３４がボディ１３における嵌合溝１６に嵌合しなくても、そのボディ１３に対するプランジャ１４の組付けに際して、自動的に、回転抑制治具３３の複数の起立板部３４とボディ１３における嵌合溝１６とが嵌合することから、ボディ用搬送具３６としては、ボディ１３を把持して有底筒体状の回転抑制治具３３に搬送し、そのボディ１３を回転抑制治具３３内に降下ないしは挿入できるものであればよく、ボディ他端面１３ｂの複数の嵌合溝１６を回転抑制治具３３の複数の起立板部３４に嵌合させる機能まで持たせる必要はなくなる。 Moreover, when the body 13 is lowered into the rotation suppression jig 33 by the body transport tool 36, the plurality of upright plate portions 34 of the rotation suppression jig 33 do not fit into the fitting grooves 16 in the body 13. In addition, when the plunger 14 is assembled to the body 13, the plurality of upright plate portions 34 of the rotation suppressing jig 33 and the fitting grooves 16 in the body 13 are automatically fitted to each other. As long as the body 13 is gripped and conveyed to the bottomed cylindrical rotation suppression jig 33, the body 13 can be lowered or inserted into the rotation suppression jig 33. There is no need to provide a function for fitting the plurality of fitting grooves 16 to the plurality of upright plate portions 34 of the rotation suppressing jig 33.
　さらに、回転抑制治具３３に対するボディ１３の搬送、回転抑制治具３３に自立保持されたボディ１３に対するプランジャ１４の搬送が、図１２に示すように、いずれも、回転抑制治具３３の上方に移動させた後、降下させる単純な経路をなすものとすることができることから、ボディ用搬送具３６及びプランジャ用搬送具３８の搬送等の制御を簡単化することができる。 Furthermore, the conveyance of the body 13 to the rotation suppression jig 33 and the conveyance of the plunger 14 to the body 13 held by the rotation suppression jig 33 are both above the rotation suppression jig 33 as shown in FIG. Since it is possible to form a simple path to be lowered after the movement, it is possible to simplify the control of the conveyance of the body conveyance tool 36 and the plunger conveyance tool 38.
　さらにまた、プランジャ先端部２５外周面に予め嵌め込んでおかれた止め輪２４を、プランジャ１４とボディ１３との組付けに伴い、プランジャ用搬送具３８の押圧部４５を利用して、ボディ１３における開口内周縁部の保持溝２１に押し込むことから、止め輪２４をボディ１３の開口内周縁部の保持溝２１に保持させることに関し、プランジャ用搬送具２１を有効に利用できる。 Furthermore, the retaining ring 24 fitted in advance on the outer peripheral surface of the plunger tip portion 25 is attached to the body 13 by using the pressing portion 45 of the plunger transport tool 38 in association with the assembly of the plunger 14 and the body 13. Therefore, the plunger carrier 21 can be used effectively with respect to holding the retaining ring 24 in the holding groove 21 on the inner peripheral edge of the opening of the body 13.
　図１５は第２実施形態を示す。この第２実施形態において、前記第１実施形態と同一構成要素については同一符号を付してその説明を省略する。 FIG. 15 shows a second embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
　図１５に示す第２実施形態は、プランジャ用搬送具３８に、プランジャ１４に対して、把持機能だけを持たせ、回転機能については持たせないようにする一方、回転抑制治具３３を、その軸線ＯＪを中心として回転させるようにしたものを示している。 In the second embodiment shown in FIG. 15, the plunger transport tool 38 has only a gripping function and no rotation function with respect to the plunger 14. It shows what is rotated about the axis OJ.
　具体的には、作業面３７を構成する作業板３７Ａに凹所４６が形成され、その凹所４６内には回転抑制治具３３が相対回転可能に収納されている。この回転抑制治具３３の底部外面には支持軸４７が設けられており、その支持軸４７は、凹所４６底部を回転可能に貫通して作業板３７Ａの下方に伸び、その支持軸４７には、モータ４８の駆動力が駆動力伝達機構（具体的にはギア類）４９を介して回転力として伝達されている。これにより、モータ４８の駆動力を利用して回転抑制治具３３がその軸線ＯＪを中心として回転させることができることになり、プランジャ用搬送具３８にプランジャ１４を回転させる機能を持たせる必要はなくなる。 Specifically, a recess 46 is formed in the work plate 37A constituting the work surface 37, and the rotation suppression jig 33 is accommodated in the recess 46 so as to be relatively rotatable. A support shaft 47 is provided on the outer surface of the bottom of the rotation restraining jig 33, and the support shaft 47 extends through the bottom of the recess 46 to rotate below the work plate 37 </ b> A. The driving force of the motor 48 is transmitted as a rotational force via a driving force transmission mechanism (specifically, gears) 49. As a result, the rotation suppression jig 33 can be rotated about the axis OJ by using the driving force of the motor 48, and the plunger transport tool 38 need not have a function of rotating the plunger 14. .
　以上実施形態について説明したが本発明にあっては、次のような態様を包含する。
（１）回転抑制治具３３の底部内面に、その回転抑制治具３３の軸線を中心として放射状に伸びる複数の嵌合溝を形成する一方、ボディ１３の周縁部端面に、回転抑制治具３３における複数の嵌合溝に対応させて、該複数の各嵌合溝に嵌合する複数の起立板部を形成すること。
（２）複数の起立板部３４の数及び複数の嵌合溝１６の数が、４に限らず、２以上あれば足り、３以上が好ましいこと。 Although the embodiment has been described above, the present invention includes the following aspects.
(1) A plurality of fitting grooves extending radially about the axis of the rotation suppression jig 33 are formed on the inner surface of the bottom of the rotation suppression jig 33, while the rotation suppression jig 33 is formed on the end surface of the peripheral edge of the body 13. A plurality of upright plate portions that fit into the plurality of fitting grooves are formed in correspondence with the plurality of fitting grooves.
(2) The number of the plurality of upright plate portions 34 and the number of the plurality of fitting grooves 16 are not limited to four, but two or more are sufficient, and three or more are preferable.
　５　機械式ラッシュアジャスタ
　１３　ボディ
　１３ａ　ボディの一端面
　１３ａａ　ボディ一端面における開口
　１３ｂ　ボディの他端面
　１３ｂａ　ボディ他端面における開口
　１３ｂｂ　周縁部端面
　１４　プランジャ
　１４ａ　プランジャ先端部
　１６　嵌合溝（凹部、嵌合凹部）
　１７　ボディ内周面の雌ねじ
　１８　プランジャ外周面の雄ねじ
　２１　保持溝
　２４　止め輪
　２５　プランジャ先端部
　２５Ａ　一対の把持面
　２６ａ　本体部の基端面（プランジャ基端面）
　３２　プランジャスプリング（付勢手段）
　３３　回転抑制治具
　３４　起立板部（突部）
　３５　ターンテーブル
　３６　ボディ用搬送具
　３７　作業面
　３８　プランジャ用搬送具 DESCRIPTION OF SYMBOLS 5 Mechanical lash adjuster 13 Body 13a One end surface of body 13aa Opening in one end surface of body 13b Other end surface of body 13ba Opening in other end surface of body 13bb Peripheral end surface 14 Plunger 14a Plunger tip portion 16 Fitting groove (recess, fitting recess)
17 Female thread on the inner peripheral surface of the body 18 Male thread on the outer peripheral surface of the plunger 21 Holding groove 24 Retaining ring 25 Plunger distal end portion 25A Pair of gripping surfaces 26a Base end surface of the main body (plunger base end surface)
32 Plunger spring (biasing means)
33 Rotation suppression jig 34 Standing plate (projection)
35 turntable 36 body transport device 37 work surface 38 plunger transport device

Claims (17)

  1. 　一端面が開口された筒状のボディの内周面にプランジャの外周面が、該プランジャの先端部を該ボディの一端開口から突出させた状態で螺合され、前記ボディと前記プランジャとの間に付勢手段が該プランジャを該ボディに対して伸長する方向に付勢するようにして介装されている機械式ラッシュアジャスタにおいて、
    　前記ボディの他端面に、組付け時に用いる回転抑制治具が平面視非円形形状を示す突部又は凹部の一方を備えていることに対応すべく、その一方を嵌合するための他方が形成され、
    　前記プランジャの横断面形状が、該プランジャの先端部において、非円形形状に形成されている、
    ことを特徴とする機械式ラッシュアジャスタ。     The outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger. In the mechanical lash adjuster, the urging means is interposed so as to urge the plunger in a direction extending with respect to the body.
    On the other end surface of the body, the other for fitting one of them is formed so as to correspond to the fact that the rotation suppressing jig used at the time of assembling has either one of a projection or a recess showing a non-circular shape in plan view. And
    The cross-sectional shape of the plunger is formed in a non-circular shape at the tip of the plunger.
    This is a mechanical lash adjuster.
  2. 　請求項１において、
    　前記ボディの他端面に、組付け時に用いる回転抑制治具が平面視非円形形状を示す突部を備えていることに対応すべく、その突部を嵌合するための嵌合凹部が形成されている、
    ことを特徴とする機械式ラッシュアジャスタ。     In claim 1,
    A fitting recess for fitting the protrusion is formed on the other end surface of the body so as to correspond to the fact that the rotation suppression jig used at the time of assembly has a protrusion showing a non-circular shape in plan view. ing,
    This is a mechanical lash adjuster.
  3. 　請求項２において、
    　前記嵌合凹部は、前記回転抑制治具の突部が複数の起立板部を起立させつつ放射状に伸びているものであることに対応すべく、該複数の起立板部を嵌合する複数の嵌合溝として形成されている、
    ことを特徴とする機械式ラッシュアジャスタ。     In claim 2,
    The fitting recess includes a plurality of fittings for fitting the plurality of upright plate portions so as to correspond to the protrusions of the rotation suppressing jig extending radially while raising the plurality of upright plate portions. Formed as a fitting groove,
    This is a mechanical lash adjuster.
  4. 　請求項３において、
    　前記ボディが、一端及び他端が開口されたものとされ、
    　前記複数の嵌合溝が、前記ボディの他端開口を区画する周縁部端面において形成されている、
    ことを特徴とする機械式ラッシュアジャスタ。     In claim 3,
    The body has one end and the other end opened,
    The plurality of fitting grooves are formed on a peripheral end face that defines the other end opening of the body.
    This is a mechanical lash adjuster.
  5. 　請求項４において、
    　前記プランジャの先端部外周面に、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されている、
    ことを特徴とする機械式ラッシュアジャスタ。     In claim 4,
    A pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger.
    This is a mechanical lash adjuster.
  6. 　請求項１において、
    　前記プランジャの先端部外周面に、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されている、
    ことを特徴とする機械式ラッシュアジャスタ。     In claim 1,
    A pair of gripping surfaces forming a flat surface are formed on the outer peripheral surface of the distal end portion of the plunger so as to face each other in the radial direction of the plunger.
    This is a mechanical lash adjuster.
  7. 　一端面が開口された筒状のボディの内周面にプランジャの外周面が、該プランジャの先端部を該ボディの一端開口から突出させた状態で螺合され、前記ボディと前記プランジャとの間に付勢手段が該プランジャを該ボディに対して伸長する方向に付勢するようにして介装されている機械式ラッシュアジャスタの製造方法において、
    　平面視非円形形状を示す突部又は凹部の一方が備えられる回転抑制治具と、前記ボディとして、該ボディの他端面に、前記回転抑制治具の突部又は凹部の一方に対応して、その一方を嵌合するための他方が形成されているものと、前記プランジャとして、該プランジャの先端部の横断面形状が非円形形状に形成されたものと、前記付勢手段と、を用意し、
    　先ず、ボディ用搬送具を利用することにより、前記回転抑制治具の上方側から該回転抑制治具の突部又は凹部の一方上に前記ボディの他端面を載置し、
    　次に、プランジャ用搬送具を利用することにより、前記プランジャを、該プランジャの先端部を把持した状態で該プランジャの基端面が前記ボディの一端開口に入り込むように搬送すると共に、該プランジャの基端面が該ボディの一端開口に入り込むように搬送されるときまでに該ボディ内に前記付勢手段を収納し、
    　次に、前記プランジャ用搬送具による前記プランジャ先端部の把持状態を維持しつつ該プランジャ用搬送具又は前記回転抑制治具のうちの一方を回転させて、該回転抑制治具の突部又は凹部の一方を該ボディ他端面における突部又は凹部の他方に嵌合させた状態の下で、該プランジャの外周面と該ボディの内周面とを相対回転させる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     The outer peripheral surface of the plunger is screwed onto the inner peripheral surface of the cylindrical body whose one end surface is open, with the distal end portion of the plunger protruding from the one end opening of the body, and between the body and the plunger. In the manufacturing method of the mechanical lash adjuster, the biasing means is interposed so as to bias the plunger in a direction extending with respect to the body.
    A rotation suppression jig provided with one of a protrusion or a recess showing a non-circular shape in plan view, and the body as the other end surface of the body, corresponding to one of the protrusion or the recess of the rotation suppression jig, Prepare one having the other for fitting one, a plunger having a non-circular cross-sectional shape at the tip of the plunger, and the biasing means. ,
    First, the other end surface of the body is placed on one of the protrusions or recesses of the rotation suppression jig from the upper side of the rotation suppression jig by using a body transport tool,
    Next, by using a plunger conveying tool, the plunger is conveyed so that the proximal end surface of the plunger enters the one end opening of the body in a state where the distal end portion of the plunger is gripped, and the base of the plunger is The biasing means is housed in the body by the time when the end surface is conveyed so as to enter the one end opening of the body,
    Next, while maintaining the gripping state of the plunger tip by the plunger conveying tool, one of the plunger conveying tool or the rotation suppressing jig is rotated, and the protrusion or recess of the rotation suppressing jig is rotated. Under the state where one of the two is fitted to the other of the protrusion or recess in the other end surface of the body, the outer peripheral surface of the plunger and the inner peripheral surface of the body are relatively rotated.
    A method for producing a mechanical lash adjuster.
  8. 　請求項７において、
    　前記回転抑制治具として、平面視非円形形状の突部を備えるものを用い、
    　前記ボディとして、該ボディの他端面に、前記突部を嵌合するための嵌合凹部を備えるものを用いる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 7,
    As the rotation restraining jig, using a projection provided with a non-circular projection in plan view,
    As the body, on the other end surface of the body, one having a fitting recess for fitting the protrusion is used.
    A method for producing a mechanical lash adjuster.
  9. 　請求項８において、
    　前記回転抑制治具の突部として、複数の起立板部を起立させつつ放射状に伸びている構造のものを用い、
    　前記ボディ他端面の嵌合凹部として、前記複数の起立板部に対応して該複数の起立板部を嵌合する複数の嵌合溝とされたものを用いる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 8,
    As the protrusion of the rotation suppression jig, use a structure that extends radially while standing a plurality of upright plate parts,
    As the fitting concave portion of the other end surface of the body, a plurality of fitting grooves that fit the plurality of standing plate portions corresponding to the plurality of standing plate portions are used.
    A method for producing a mechanical lash adjuster.
  10. 　請求項９において、
    　前記ボディとして、一端及び他端が開口されていると共に、前記複数の嵌合溝が、該ボディの他端開口を区画する周縁部端面において形成されているものを用いる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 9,
    As the body, one end and the other end are opened, and the plurality of fitting grooves are formed on a peripheral end surface that defines the other end opening of the body.
    A method for producing a mechanical lash adjuster.
  11. 　請求項１０において、
    　前記プランジャとして、該プランジャの先端部外周面において、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されているものを用いる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 10,
    As the plunger, on the outer peripheral surface of the distal end portion of the plunger, a pair of gripping surfaces forming a flat surface is used in a state of being opposed in the radial direction of the plunger.
    A method for producing a mechanical lash adjuster.
  12. 　請求項７において、
    　前記プランジャとして、該プランジャの先端部外周面において、平坦面をなす一対の把持面が、該プランジャの径方向において対向した状態をもって形成されているものを用いる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 7,
    As the plunger, on the outer peripheral surface of the distal end portion of the plunger, a pair of gripping surfaces forming a flat surface is used in a state of being opposed in the radial direction of the plunger.
    A method for producing a mechanical lash adjuster.
  13. 　請求項９において、
    　前記回転抑制治具として、該回転抑制治具の内部に前記ボディを上方から降下させることができる有底筒体であって、該有底筒体の底部内面に前記複数の起立板部が形成されたものを用いる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 9,
    As the rotation suppression jig, a bottomed cylindrical body capable of lowering the body from above in the rotation suppression jig, wherein the plurality of upright plate portions are formed on the inner surface of the bottom of the bottomed cylindrical body Use
    A method for producing a mechanical lash adjuster.
  14. 　請求項７において、
    　前記プランジャを前記ボディに搬送するに先立ち、該プランジャの先端部外周に拡縮可能な止め輪を嵌め込むと共に、該プランジャ先端部のうち、前記止め輪よりも先端部分を前記プランジャ用搬送具により把持し、
    　その上で、前記プランジャ外周面と前記ボディ内周面とを相対回転させて該プランジャを該ボディ内に進入させるに伴い、前記プランジャ用搬送具をもって前記止め輪を前記ボディの開口周縁部内に押し込んで該止め輪を該ボディの開口内周縁部に保持させる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 7,
    Prior to transporting the plunger to the body, a snap ring that can be expanded and contracted is fitted on the outer periphery of the tip of the plunger, and the tip of the plunger tip is gripped by the transport tool for the plunger. And
    Then, as the plunger outer peripheral surface and the body inner peripheral surface are relatively rotated to cause the plunger to enter the body, the retaining ring is pushed into the opening peripheral portion of the body by the plunger conveying tool. The retaining ring is held at the inner periphery of the opening of the body,
    A method for producing a mechanical lash adjuster.
  15. 　請求項７において、
    　前記プランジャ外周面と前記ボディ内周面とを相対回転させて該プランジャ外周面と該ボディ内周面とを所定の螺合状態とするに際し、前記回転抑制治具を作業面に対して固定する一方、前記プランジャ用搬送具によって前記プランジャに対して回転力を付与する、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 7,
    When the plunger outer peripheral surface and the body inner peripheral surface are relatively rotated to bring the plunger outer peripheral surface and the body inner peripheral surface into a predetermined screwed state, the rotation suppression jig is fixed to the work surface. On the other hand, a rotational force is applied to the plunger by the plunger carrier.
    A method for producing a mechanical lash adjuster.
  16. 　請求項１５において、
    　前記作業面を、ターンテーブルの上面により構成し、
    　前記回転抑制治具として、複数の回転抑制治具を用意し、
    　前記複数の回転抑制治具を、前記ターンテーブルの上面に該ターンテーブルの周方向に所定間隔をあけて固定し、
    　前記ターンテーブルの回転駆動により、前記各回転抑制治具を、各組付け工程に順次、移行させる、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。     In claim 15,
    The work surface is constituted by the upper surface of the turntable,
    As the rotation suppression jig, a plurality of rotation suppression jigs are prepared,
    The plurality of rotation suppression jigs are fixed to the upper surface of the turntable with a predetermined interval in the circumferential direction of the turntable,
    By rotating the turntable, the rotation suppression jigs are sequentially transferred to the assembly steps.
    A method for producing a mechanical lash adjuster.
  17. 　請求項７において、
    　前記プランジャ外周面と前記ボディ内周面とを相対回転させて該プランジャ外周面と該ボディ内周面とを所定の螺合状態とするに際し、前記プランジャ用搬送具によって前記プランジャの先端部を把持することにより、該プランジャを非回転状態に保持する一方、前記回転抑制治具によって前記ボディに対して回転力を付与する、
    ことを特徴とする機械式ラッシュアジャスタの製造方法。
          In claim 7,
    When the plunger outer peripheral surface and the body inner peripheral surface are rotated relative to each other to bring the plunger outer peripheral surface and the body inner peripheral surface into a predetermined screwed state, the plunger transporter grips the distal end portion of the plunger. By holding the plunger in a non-rotating state, while applying a rotational force to the body by the rotation suppression jig,
    A method for producing a mechanical lash adjuster.
PCT/JP2014/083340 2014-12-17 2014-12-17 Mechanical lash adjuster and method for manufacturing mechanical lash adjuster WO2016098188A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108180048A (en) * 2017-12-15 2018-06-19 潍柴动力股份有限公司 A kind of valve lash adjustment device
CN108331630A (en) * 2018-02-05 2018-07-27 安徽江淮汽车集团股份有限公司 A kind of rocker-arm engine valve clearance regulating device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563187A (en) * 1979-06-20 1981-01-13 Tokico Ltd Bolt clamping machine
JPS60138618U (en) * 1984-02-24 1985-09-13 豊田工機株式会社 screw tightening device
JP2008286000A (en) * 2007-05-15 2008-11-27 Ntn Corp Lash adjuster
JP2009257305A (en) * 2008-03-24 2009-11-05 Ntn Corp Lash adjuster
JP2009270565A (en) * 2008-04-09 2009-11-19 Ntn Corp Lash adjuster

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563187A (en) * 1979-06-20 1981-01-13 Tokico Ltd Bolt clamping machine
JPS60138618U (en) * 1984-02-24 1985-09-13 豊田工機株式会社 screw tightening device
JP2008286000A (en) * 2007-05-15 2008-11-27 Ntn Corp Lash adjuster
JP2009257305A (en) * 2008-03-24 2009-11-05 Ntn Corp Lash adjuster
JP2009270565A (en) * 2008-04-09 2009-11-19 Ntn Corp Lash adjuster

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108180048A (en) * 2017-12-15 2018-06-19 潍柴动力股份有限公司 A kind of valve lash adjustment device
CN108331630A (en) * 2018-02-05 2018-07-27 安徽江淮汽车集团股份有限公司 A kind of rocker-arm engine valve clearance regulating device
CN108331630B (en) * 2018-02-05 2019-08-06 安徽江淮汽车集团股份有限公司 A kind of rocker-arm engine valve clearance regulating device

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