JP4480917B2 - Snap ring mounting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a snap ring mounting device that automatically mounts a C-shaped snap ring having a slot into a mounting groove formed on the inner peripheral surface of a workpiece, and in particular, positioning the slot in a predetermined direction, The present invention relates to a snap ring mounting device that automatically performs all operations such as diameter reduction and mounting.
[0002]
[Prior art]
In a workpiece having a mounting groove for mounting a C-shaped snap ring, for example, a piston of an internal combustion engine, an annular ring formed on the inner peripheral surface of the piston hole is provided with a snap ring for preventing the piston pin connecting the connecting rod from falling off. Various snap ring mounting devices for mounting in the mounting groove have been developed.
In this mounting device, the snap ring is first taken out from the magazine, etc., reduced in diameter, continuously pushed into the piston mounting groove, and then expanded by its own elastic restoring force to complete the mounting. In the process from taking out the ring to attaching it, it is necessary to regulate the direction of the slot so as to face a predetermined direction so that the position of the slot does not shift.
[0003]
As mounting apparatuses for performing such a series of processes, for example, those disclosed in Japanese Patent Application Laid-Open Nos. 10-156640 and 11-300767 are known. The mounting apparatus disclosed in Japanese Patent Application Laid-Open No. 10-156640 is a state in which a diameter is reduced by taking out from a magazine, transporting to a diameter reducing process by a transfer arm, changing from an input area to a diameter reducing area in the diameter reducing process. A unit is provided for each work process such as pushing into a mounting groove from the side, and from these series of units, the snap ring is taken out to mounted.
Further, in these series of work steps, a plurality of guide plates that engage with the snap ring slots are provided for each unit in order to regulate the direction of the snap ring slots in a certain direction.
On the other hand, the mounting device disclosed in Japanese Patent Application Laid-Open No. 11-300647 is provided with a guide plate on the inner wall of the cylindrical member for preventing the snap ring from being displaced in the diameter reducing step. The snap ring is manually inserted into the cylindrical member so that the mouth is engaged.
[0004]
[Problems to be solved by the invention]
By the way, in the apparatus disclosed in Japanese Patent Laid-Open No. 10-156640, a plurality of units are provided corresponding to each series of operations such as transporting the taken-out snap ring by the transport arm and dropping it into the guide passage for diameter reduction. Therefore, the structure of the apparatus is complicated, and the entire apparatus is increased in size.
In addition, although a plurality of guide plates are provided for each unit in order to regulate the direction of the split ring of the snap ring, there is a possibility that the direction of the split port may be deviated during transfer between units, and the diameter reduction Since the direction of the slot is not restricted during the operation, the direction of the slot may be shifted in accordance with the operation. Once the orientation of the slot is shifted, the slot does not mesh with the guide plate in the next process, and as a result, work such as reworking is required, leading to a reduction in productivity.
On the other hand, in the apparatus disclosed in Japanese Patent Laid-Open No. 11-300647, although the orientation of the slot is restricted during the diameter reducing operation, the first alignment needs to be performed manually by the operator. Skill is required for the work, and the productivity is lowered and the production cost is increased.
[0005]
The present invention has been made in view of the above points, and the object of the present invention is to automate the entire process from taking out the snap ring to mounting and simplifying the process, thereby reducing the size of the apparatus. It is an object of the present invention to provide a snap ring mounting device that can reduce the amount of power and labor, and can direct the direction of the slot with a simple structure and can perform stable and reliable mounting.
[0006]
[Means for Solving the Problems]
  The snap ring mounting device according to the present invention includes a conveying unit that conveys a C-shaped snap ring having a dividing slot along a predetermined conveying path, and a positioning that positions the dividing slot in a predetermined direction when the snap ring is moved. Means for reducing the diameter of the snap ring conveyed by the conveying means, and an insertion means for inserting the snap ring reduced in diameter by the diameter reducing means into the mounting groove of the work, A snap ring mounting device for automatically mounting a ring, wherein the positioning means guides the snap ring from a conveyance path to a predetermined position of a diameter reducing means.As much as possibleHas a ridge guide wall that protrudes upward in a substantially vertical direction with a width that can enter between the slits.And, on the side portion of the ridge guide wall, an inclined surface that is inclined downward from the conveyance path side toward the terminal end side where the snap ring is detached is formed.It is characterized by that.
  According to this configuration, when the snap ring is moved along the transport path by the transport means and reaches the start position of the ridge guide wall, the split meshes with the ridge guide wall, and the direction of the split is in a certain direction. The snap ring is moved while changing its posture so that the split opening is positioned downward due to its own weight, and reaches the diameter reducing means. Thereafter, the diameter is reduced by the diameter reducing means and inserted into the mounting groove of the workpiece by the inserting means.
  In this way, the guide guide wall that meshes with the split of the snap ring is continuously provided in the conveyance path, and the orientation of the split is directed by changing its posture by its own weight. The slot can be aligned in a certain direction, saving the equipment. In addition, the apparatus can be reduced in size because of the simplified processes of transport, orientation of the snap ring by the ridge guide wall, posture change, diameter reduction, and insertion into the mounting groove.
  In particular, since an inclined surface is provided on the side of the ridge guide wall, when the snap ring moves from the conveyance path to the ridge guide wall and changes its posture due to its own weight, it gradually comes into contact with the inclined surface. In addition, since the slot is moved downward, the posture changes smoothly, and it is possible to prevent dropout due to a sudden posture change.
[0007]
  In the above configuration, the ridge guide wallOn the side of, Conveyance pathToThe same heightA horizontal portion formed on the upper portion, and an upper end portion formed to be inclined downward from the horizontal portion.A configuration having the following can be adopted.
  According to this configuration, when the snap ring moves from the conveyance path to the ridge guide wall and changes its posture due to its own weight,Since the upper end portion inclined from the horizontal portion toward the end portion is slid down by its own weight, the snap ring can be smoothly moved while changing the posture.
[0008]
In the above configuration, the diameter reducing means includes a reduced diameter guide path formed narrower than the outer diameter of the snap ring from the upper opening wider than the outer diameter of the snap ring toward the lower opening, and the reduced diameter guide path. It is possible to adopt a configuration having a pressing member that is reciprocally movable so as to press the snap ring from the radial direction.
According to this configuration, the snap ring directed by changing the posture by the ridge guide wall moves to the upper opening of the reduced diameter guide path, is pressed by the pressing member, moves along the reduced diameter guide path, and moves downward. When reaching the opening, the diameter is reduced to a predetermined size.
[0009]
In the above-described configuration, the positioning unit may employ a configuration that includes a regulating member that enters the slit of the snap ring and regulates its rotation in the reduced diameter guide path.
According to this configuration, in the diameter reducing step, the restricting member engages with the slot and prevents its rotation, so that the direction of the slot is reliably held in a certain direction.
[0010]
  In the above configuration, the conveyance path is formed substantially horizontally.SuddenlyThe end portion of the strip guide wall is formed at a position facing the upper opening of the reduced diameter guide path, the reduced diameter guide path is formed to extend in a substantially vertical direction, and the insertion means has a central axis of the reduced diameter snap ring. It is possible to employ a configuration having a pushing member that pushes the snap ring toward the mounting groove of the work in a state in which it faces substantially in the horizontal direction.
  According to this configuration, the snap ring moves along the conveyance path, and changes its direction by its own weight while the direction of the split opening is regulated by the protrusion guide wall. When the snap ring is separated from the terminal end of the ridge guide wall and reaches the upper opening of the reduced diameter guide path in the reduced diameter process, the snap ring is pressed downward in the vertical direction to reduce the diameter, and the pushing member in the reduced diameter state. By being pushed in the horizontal direction, it is inserted into the mounting groove of the workpiece and mounting is completed. In this way, the direction of the slit is restricted only by changing the direction of the snap ring from horizontal to vertical, and the orientation of the slot, reduction in diameter, insertion, etc. are performed by a series of movements from the top to the bottom in the vertical direction. Thus, the apparatus can be reduced in size, integrated, and the like.
[0011]
In the above configuration, at the position of the terminal portion where the snap ring is detached from the ridge guide wall, the height of the ridge guide wall from the inclined surface is formed such that the snap ring is separated from the inclined surface. Can be adopted.
According to this configuration, when the snap ring is detached from the ridge guide wall and moves to a predetermined position (upper opening) of the diameter reducing means, the split port is positioned immediately below the vertical direction, that is, the snap ring posture. Can be changed in the vertical direction. Therefore, the snap ring is smoothly guided to the reduced diameter guide path extending in the vertical direction for reducing the diameter. Thereby, when moving between processes, it can prevent more reliably that direction of a snap ring shifts.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 3 are block diagrams showing an embodiment of a snap ring mounting device according to the present invention, and FIG. 4 is a diagram for explaining the operation thereof. As shown in FIG. 1, this apparatus includes a conveying means 10 that conveys a C-shaped snap ring S having a slit S <b> 1, and positioning that positions the slit S <b> 1 in a predetermined direction when the snap ring S is moved. Means 20, 30; diameter reducing means 40 for reducing the diameter of the snap ring S conveyed by the conveying means 10; and insertion means for inserting the snap ring S reduced in diameter by the diameter reducing means 40 into the mounting groove W1 of the workpiece W. 50 etc. are provided as its basic configuration.
[0013]
As shown in FIGS. 1 and 2, the conveying means 10 is disposed on a conveying path 13 that is defined by a guide 12 formed on the upper surface of the conveying base 11 and extends in the horizontal direction, and one end side of the conveying base 11. It is constituted by a cutout plate 15 that is reciprocated by sliding on the conveyance path 13 by a hydraulic cylinder 14. A magazine M on which a plurality of snap rings S are stacked in the vertical direction is detachably installed in the middle of the transport path 13. In the magazine M, the plurality of stacked snap rings S are positioned in advance so that the split slot S1 faces forward in the direction of being cut out (extruded) by the cutting plate 15, as shown in FIG. ing.
[0014]
The positioning means 20 is formed at the other end of the conveyance base 11, that is, in front of the conveyance path 13, and a ridge guide wall 21 formed at the same height following the conveyance path 13, and the ridge guide wall 21. The inclined surface 22 is formed on both side portions of the first and second guides 23 and the like are formed on both outer sides of the inclined surface 22.
The ridge guide wall 21 has an upper end 21a extending in the horizontal direction so as to guide the snap ring S from the transport path 13 to a predetermined position (upper opening 41a described later) of the diameter reducing means 40, and the slit S1. It is formed so as to protrude vertically upward with a width that can enter between. Further, the start region 21a 'of the ridge guide wall 21 is formed in a tapered shape with a narrow width so that the snap ring S can be smoothly engaged.
The inclined surface 22 is formed to be inclined linearly downward in the vertical direction from the same height as the conveyance path 13 toward the position of the terminal end portion P1 where the snap ring S is detached from the protrusion guide wall 21. . Then, at the position of the terminal end portion P1, the height H of the ridge guide wall 21 is such that the snap ring S is separated from the inclined surface 22 and only the upper end portion 21a of the ridge guide wall 21 as shown in FIGS. It is formed at the height supported by.
[0015]
Accordingly, the snap ring S that has been moved by the cutting plate 15 and has reached the end of the conveyance path 13 is moved further from the horizontal direction due to its own weight when the split slot S1 is engaged with the ridge guide wall 21 and further moved. The posture will be changed vertically downward. That is, the protrusion guide wall 21 performs positioning (orientation) of the slit S1 of the snap ring S and attitude change of the snap ring S.
[0016]
As shown in FIGS. 1 to 3, the diameter reducing means 40 includes a diameter reducing guide 41 ′ that extends in the vertical direction adjacent to the terminal end portion P <b> 1 of the ridge guide wall 21 and delimits the diameter reducing guide path 41. A pressing shaft 42 as a pressing member supported so as to be capable of reciprocating in the vertical direction in the radial guide path 41, a hydraulic cylinder 43 that drives the pressing shaft 42, and the like.
The reduced diameter guide path 41 is formed to be slightly wider than the thickness of the snap ring S and is wider than the outer diameter from the upper opening 41a that is wider than the outer diameter of the snap ring S as shown in FIG. A narrow opening is formed toward the lower opening 41b having a narrow dimension, that is, from the upper side to the lower side.
[0017]
As shown in FIG. 1, the insertion means 50 includes an insertion cylinder 51 that holds the snap ring S with a reduced diameter, a slider 52 that supports the insertion cylinder 51 so as to reciprocate in the horizontal direction, and a passage in the insertion cylinder 51. An insertion shaft 53 as a pushing member that is reciprocally fitted to 51a, a fixing member 54 that fixes the insertion shaft 53, a slider 55 that supports the fixing member 54 so as to reciprocate in the horizontal direction, and insertion When both ends of the cylinder 51 and the fixing member 54 are hooked and contracted, a biasing force is exerted in a direction away from both, and when the both ends are stretched, a coil spring 56 exerting a biasing force in a direction in which both are approached, and the fixing member 54 in the horizontal direction. And a guide rail 59 provided on the base 58 for guiding the sliders 52 and 55, and the like. In addition, the above-mentioned conveyance base 11 is being fixed to the base 58 via the support | pillar 11 '.
[0018]
The insertion cylinder 51 is formed to be movable independently of the reduced diameter guide 41 ′ with a slight gap from the lower end of the reduced diameter guide 41 ′. Further, as shown in FIGS. 1 and 4A, an opening 51b ′ having the same width as the lower opening 41b is formed in the insertion cylinder 51 so as to be continuous with the lower opening 41b of the reduced diameter guide path 41. In addition, an opening 51b ″ that allows insertion of a rotation restricting pin 31 described later is formed below the opposite side.
The insertion cylinder 51 is formed with a passage 51a that guides the snap ring S having a reduced diameter in the horizontal direction and has an inner diameter slightly larger than the width of the lower opening 41b. Accordingly, in the partial passage 51b, the snap ring S that has passed through the lower opening 41b of the reduced diameter guide path 41 is held in a reduced diameter state that is slightly wider than when located in the lower opening 41b. Is done. As a result, even when the pressing shaft 42 is retracted upward and separated from the snap ring S, the snap ring S is securely held in the insertion tube 51, and the rotation restricting pin 31 described later is easily pulled out downward. be able to. At this time, the central axis of the snap ring S is in the horizontal direction.
[0019]
The positioning means 30 includes a rotation restricting pin 31 as a restricting member supported on the slider 52 so as to freely reciprocate in the vertical direction, a drive cylinder (not shown) for driving the rotation restricting pin 31, and the like. Therefore, the rotation restricting pin 31 passes through the openings 51 b ″ and 51 b ′ of the insertion cylinder 51 and protrudes into the reduced diameter guide path 41, and the distal end thereof enters the split slot S 1 of the snap ring S, thereby reducing the diameter. The rotation of the snap ring S at is controlled.
The rotation restricting pin 31 is driven by the drive cylinder to move downward as the snap ring S is pushed by the pressing shaft 42 and moves downward. That is, it is interlocked with the movement of the pressing shaft 42 and the snap ring S.
[0020]
A table 60 for sequentially positioning a plurality of workpieces W is disposed at a position facing the insertion cylinder 51, and the workpiece W (here, an engine piston) is adjacent to a jig 61 fixed to the table 60. ) Is fixed.
That is, when the distal end portion of the insertion cylinder 51 is fitted into the opening of the jig 61, the passage 51a of the insertion cylinder 51 and the passage 61a of the jig 61 become a continuous passage, and the snap ring S is in a reduced diameter state. Is pushed by the insertion shaft 53 to move in the passages 51a and 61a and is inserted into the mounting groove W1 of the workpiece W.
As shown in FIG. 2, the piston as the workpiece W has an annular mounting groove W1 in which snap rings S are mounted on both sides of the piston pin W3 in order to prevent the piston pin W3 connecting the connecting rod W2 from falling off. It has.
[0021]
Next, the operation of this apparatus will be described. First, the hydraulic cylinder 14 is driven to move the cutting plate 15, and the snap ring S located at the lowermost part in the magazine is cut out (pushed out). Then, when the snap ring S is pushed forward by the cutting plate 15 and moves forward along the conveying path 13 and reaches the start region 21 a of the ridge guide wall 21, the split S 1 of the snap ring S becomes the ridge guide wall 21. The snap ring S begins to change its posture downward due to its own weight.
At this time, since the lower end portion of the snap ring S is moved toward the terminal end portion P1 while being in contact with the inclined surface 22, the posture change from the horizontal direction to the vertical direction is smoothly performed. As a result, a rapid change in posture can be prevented, and the positioning of the snap ring S and the conversion of the posture can be performed stably and reliably.
[0022]
When the snap ring S reaches the terminal end portion P1 of the ridge guide wall 21, the lower end portion thereof is completely separated from the inclined surface 22, so that the snap ring S is positioned in the vertical direction so that the slit S1 is located directly below. change. And if it moves further and leaves | separates from the protrusion guide wall 21, it will fall freely to the upper opening 41a of the diameter-reduction guide path 41 arrange | positioned in the position which faces the terminal part P1 with the dead weight.
In addition, at the same time as the snap ring S is detached and starts to fall, the rotation restricting pin 31 is held in a state of protruding upward in advance so that the tip of the rotation restricting pin 31 enters the slit S1.
In this way, since the posture of the snap ring S is converted and positioned by its own weight, a special energy supply source is not required, and therefore the apparatus can be labor-saving. Further, since the slit S1 can be positioned with a simple configuration of the ridge guide wall 21, the structure can be simplified.
[0023]
As shown in FIG. 4A, when the snap ring S is positioned in the upper opening 41a of the reduced diameter guide path 41, the pressing shaft 42 starts to move downward. At this time, the rotation restricting pin 31 has already entered the slot S1 of the snap ring S and restricted its rotation. And as shown in FIG.4 (b), the press shaft 42 contact | abuts to an upper end part from the radial direction of the snap ring S, and a diameter reduction operation | movement is started.
[0024]
As shown in FIG. 4C, the snap ring S reaches the lower opening 41b and is reduced in diameter to a predetermined diameter by the downward movement of the pressing shaft 42. The rotation restricting pin 31 also moves downward in conjunction with the diameter reducing operation by the downward movement of the pressing shaft 42.
Then, as shown in FIG. 4D, when the snap ring S reaches the passage 51b of the insertion cylinder 51, it is held in a reduced diameter state that is slightly wider than when it is in the lower opening 41b. At this point, the diameter reducing operation is completed. Thereafter, as shown in FIG. 4 (e), the rotation restricting pin 31 is pulled out from the opening 51 b ″ of the insertion cylinder 51 and retracted, and the pressing shaft 42 moves upward.
In the diameter reduction process, since the rotation restricting pin 31 is always in the slit S1 of the snap ring S, the snap ring S is not rotated, and the slit S1 is held in a state of facing down. Become.
[0025]
Subsequently, when the hydraulic cylinder 57 is driven and the fixing member 55 moves leftward in FIG. 1, the insertion cylinder 51 is also pushed by the urging force of the coil spring 56 and moves leftward. And when the front-end | tip part of the insertion cylinder 51 fits in the opening part of the jig | tool 61, the insertion cylinder 51 will stop. Thereafter, by further driving of the hydraulic cylinder 57, the insertion shaft 53 moves leftward in the passage 51a against the biasing force of the coil spring 56, and pushes the snap ring S in a reduced diameter state to move in the axial direction. .
When the insertion shaft 53 further moves and the snap ring S is inserted into the mounting groove W1 of the workpiece W, the snap ring S expands by its own elastic return force and is completely fitted into the mounting groove W1. Thereby, the mounting of the snap ring S is completed.
[0026]
Thereafter, when the hydraulic cylinder 57 is driven in the reverse direction, the fixing member 55, that is, the insertion shaft 53 starts to move rightward, and then the insertion cylinder 51 also moves rightward by being attracted by the urging force of the coil spring 56. To do. Thereby, the insertion cylinder 51 is detached from the jig 61 and returned to the standby position. Thereafter, the workpiece W to which the snap ring S is attached is conveyed to another process, and a new workpiece W is set on the table 60.
[0027]
As described above, according to the apparatus of the present embodiment, the snap ring S can be mounted by the simplified processes of transporting, positioning, and changing the posture from the horizontal direction to the vertical direction, reducing the diameter, and inserting the snap ring S. In addition, since the snap ring S is transported from the upper side to the lower side in the vertical direction, the structure of the entire apparatus can be simplified and integrated.
[0028]
5 and 6 are configuration diagrams showing another embodiment of the snap ring mounting device according to the present invention, and FIG. 7 is a diagram for explaining the operation thereof. The apparatus according to this embodiment has the same configuration as that of the above-described embodiment except that the positioning means for positioning the orientation of the slit S1 is changed during the diameter reduction process. Therefore, the same components are denoted by the same reference numerals and the description thereof is omitted, and only different configurations and their operations will be described below.
[0029]
In the apparatus according to this embodiment, as shown in FIG. 5, positioning means 300 is provided for entering the reduced diameter guide path 41 from the side surface direction of the reduced diameter guide path 41 and positioning the direction of the split slot S1. The positioning means 300 includes a cover 301 provided so as to cover a notch hole 41c formed on the side surface of the reduced diameter guide 41 ′, and a regulating member that is swingably supported by a support shaft 302 fixed to the cover 301. As a rotation restricting plate 303, and a coil spring 304 disposed between the rotation restricting plate 303 and the inner wall surface of the cover 301.
[0030]
As shown in FIGS. 5 and 6, the rotation restricting plate 303 is formed to be narrower than the cutout hole 41 c and the slit S <b> 1 of the snap ring S, and is directed toward the reduced diameter guide path 41 by the coil spring 304. Thus, the side surface is held in a state where the side surface is in contact with the inner wall of the reduced diameter guide path 41 or in a non-contact state. Then, as the pressing shaft 42 descends and the snap ring S is reduced in diameter, the rotation restricting plate 303 is pushed outward and detached from the reduced diameter guide path 41.
The insertion cylinder 51 is not provided with the lower opening 51b ″ through which the rotation restricting pin 31 is inserted as shown in the above-described embodiment.
[0031]
Next, the operation of the positioning means 300 in this apparatus will be described.
As shown in FIG. 7A, when the snap ring S in which the slit S1 has been positioned and changed in posture by the ridge guide wall 21 falls freely into the upper opening 41a of the reduced diameter guide path 41, The mouth S1 is positioned in the vicinity immediately above the upper end of the rotation restricting plate 303. When the pressing shaft 42 moves downward, the slit S1 of the snap ring S meshes with the rotation restricting plate 303, and the snap ring S is reduced in diameter.
[0032]
As the pressing shaft 42 moves, the snap ring S is reduced in diameter and reaches the lower opening 41b as shown in FIG. 7B, and the rotation restricting plate 303 is pushed outward by the snap ring S and the pressing shaft 42. Thus, it is detached from the reduced diameter guide path 41.
Further, when the pressing shaft 42 moves downward, as shown in FIG. 7C, the snap ring S passes through the opening 51b ′ and enters the passage 51b in the insertion cylinder 51, and is slightly more than in the lower opening 41b. It is held in an expanded and reduced diameter state. Thereafter, the insertion operation by the insertion means 50 is performed as described above.
[0033]
In this embodiment, the rotation restricting plate 303 enters the slit S1 and restricts the rotation of the snap ring S except for the start and end regions of the diameter reducing process. Thereby, rotation of the snap ring S can be prevented in the diameter reducing operation.
Since the positioning means 300 is disposed in the side surface region of the reduced diameter guide 41 ′, it is suitable when the arrangement space cannot be secured below the insertion cylinder 51 as in the above-described embodiment.
[0034]
FIG. 8 is a perspective view showing another embodiment in which the positioning means 20 shown in FIG. 3 is changed. In this embodiment, the positioning means 200 is formed on the other end side of the conveyance base 11, that is, on the ridge guide wall 201 formed at the same height following the conveyance path 13 and on both sides of the ridge guide wall 21. The flat surface 202 is formed.
The ridge guide wall 201 has an upper end 201a extending in the horizontal direction so as to guide the snap ring S from the conveyance path 13 to the upper opening 41a of the reduced diameter guide path 41, and can enter between the slits S1. It is formed so as to protrude vertically upward in the width. Further, the ridge guide wall 201 is formed so as to have a height H from the flat surface 202 in the entire region.
[0035]
Therefore, when the snap ring S is moved by the cutting plate 15 and protrudes almost half or more from the end of the conveyance path 13, the split S1 is engaged with the ridge guide wall 201 by its own weight, and the vertical direction from the horizontal direction. The posture will be changed downward. That is, the protrusion guide wall 201 simultaneously performs positioning (orientation) of the slit S1 and posture change of the snap ring S from the horizontal direction to the vertical direction. In particular, it is suitable for handling a snap ring S having a relatively large diameter so that it does not easily fall off from the ridge guide wall 201 even if the posture changes suddenly.
[0036]
FIG. 9 is a perspective view showing still another embodiment in which the positioning means 20 shown in FIG. 3 is changed. In this embodiment, the positioning means 210 includes a ridge guide wall 211 formed from the other end side of the conveyance base 11, that is, the end of the conveyance path 13 toward the upper opening 41 a of the reduced diameter guide path 41, and a ridge guide. An inclined surface 212 formed on both sides of the wall 211, guides 213 formed on both outer sides of the inclined surface 212, and the like.
[0037]
The ridge guide wall 211 extends while the upper end 211a is inclined downward except for the horizontal portion 211a ′ of the start region so as to guide the snap ring S from the transport path 13 to the upper opening 41a, and the slit S1 It is formed so as to protrude vertically upward with a width that can enter between.
The inclined surface 212 is formed to be inclined linearly downward in the vertical direction from the same height as the conveyance path 13 toward the position of the terminal end portion P1 where the snap ring S is detached from the ridge guide wall 211. . As shown in FIG. 9, at the position of the terminal end portion P1, the height H of the ridge guide wall 21 is supported only by the upper end portion 211a of the ridge guide wall 211 with the snap ring S away from the inclined surface 212. It is formed at a height.
[0038]
Therefore, the snap ring S that has been moved by the cutting plate 15 and has reached the end of the conveyance path 13 is engaged with the horizontal portion 211a ′ of the ridge guide wall 211 while the split S1 is engaged with the weight of the snap ring S from the horizontal direction. Start changing posture vertically downward. The snap ring S is further pushed by the cutout plate 15 and separated from the horizontal portion 211 a ′, and at the same time, the snap ring S follows the upper end portion 211 a of the ridge guide wall 211 inclined with the lower end portion contacting the inclined surface 212 due to its own weight. And slide down toward the terminal end P1.
When reaching the end portion P1, the lower end portion of the snap ring S is separated from the inclined surface 212, and the split slot S1 faces directly below in the vertical direction, and at the same time, freely falls into the upper opening 41a of the reduced diameter guide path 41.
[0039]
That is, the protrusion guide wall 211 smoothly performs the positioning (orientation) of the slit S1 and the posture change of the snap ring S from the horizontal direction to the vertical direction. In this configuration, since the upper end portion 211a of the ridge guide wall 211 is inclined so that the snap ring S slides down due to its own weight, the cutout plate 15 is moved to the position of the terminal end portion P1 to move the snap ring S. There is no need to extrude, and the moving stroke of the cutting plate 15 can be shortened by that amount, and the apparatus can be immediately put on standby for the next step. Moreover, since the stroke can be shortened, the hydraulic cylinder 14 can be reduced in size.
[0040]
In the above embodiment, the insertion means 50 is configured to move the insertion cylinder 51 while fixing the workpiece W as shown in FIGS. 1 and 5, but is not limited to this, and conversely The insertion cylinder 51 may be fixed and the table 60 and the jig 61 may be moved toward the insertion cylinder 51. In this case, the reduced diameter guide 41 ′ and the insertion cylinder 51 can be integrally formed so that the reduced diameter guide path 41 to the passage 51 b in the insertion cylinder 51 can be a continuous path.
Moreover, as the insertion means 50, although the structure which drives the insertion cylinder 51 and the insertion shaft 53 with the one hydraulic cylinder 57 by interposing the coil spring 56 was employ | adopted, it is not limited to this, insertion You may employ | adopt the structure which drives the cylinder 51 and the insertion shaft 53 separately.
Further, the passages 51a and 51b of the insertion cylinder 51 are formed to have an inner diameter slightly larger than the width of the lower opening 41b of the reduced diameter guide passage 41, but have the same inner diameter as the width of the lower opening 41b. Also good.
[0041]
As the conveying means 10, the one constituted by the cutting plate 15 and the hydraulic cylinder 14 is adopted, but is not limited to this, and the snap ring S is cut out (extruded) from the magazine M, and the ridge guide wall 21, Other configurations may be adopted as long as they lead to 201, 211.
[0042]
Moreover, in the said embodiment, although the conveyance path 13 was formed horizontally, the diameter-reduction guide path 41 was formed in the perpendicular direction, and the channel | path 51a of the insertion cylinder 51 was formed horizontally, it is not necessarily horizontal and vertical. If the positioning and posture conversion of the snap ring S can be performed by its own weight, the conveyance path 13, the reduced diameter guide path 41, and the path 51a of the insertion cylinder 51 are somewhat inclined. It may be adopted. In this case, the workpiece W is fixed with the axis of the mounting groove W1 slightly inclined.
Furthermore, in the said embodiment, although the piston of the engine was shown as the workpiece | work W, it is not limited to this, If it has a groove | channel which mounts the snap ring S, it can apply to another workpiece | work. is there.
[0043]
【The invention's effect】
As described above, according to the snap ring mounting device of the present invention, when the snap ring is guided from the conveyance path to the predetermined position of the diameter reducing means, the split ring guide wall is formed by projecting upward in the substantially vertical direction. Positioning the mouth and changing the attitude of the snap ring can be simplified, and a special energy source is required to position and change the position of the snap ring by its own weight. Instead, the apparatus can be reduced in size and labor can be saved.
In addition, by providing an inclined surface that contacts the lower end of the snap ring on the side of the ridge guide wall, it is possible to prevent a sudden change in the posture of the snap ring and to stably lead to the diameter reducing means. it can.
Further, by providing a regulating member that enters the snap ring slot and regulates the rotation of the snap ring in the reduced diameter guide path, the direction of the split slot can be reliably positioned in a fixed direction even in the diameter reducing process.
Furthermore, by arranging the conveying means, the diameter reducing means, and the inserting means from the upper side to the lower side in the vertical direction, the apparatus can be reduced in size, consolidated, etc. Since the snap ring can be attached by a series of simplified processes such as diameter reduction, positioning, and insertion, cycle time can be shortened and productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a snap ring mounting device according to the present invention.
FIG. 2 is a plan view of the snap ring mounting device shown in FIG.
3 is a perspective view showing a ridge guide wall as positioning means constituting a part of the apparatus shown in FIG. 1; FIG.
4 is a diagram showing a diameter reduction process of the apparatus shown in FIG. 1, and (a), (b), (c), (d), and (e) are side cross-sectional views each showing an operation.
FIG. 5 is a side view showing another embodiment of the snap ring mounting device according to the present invention.
6A and 6B show positioning means in a reduced diameter guide path that constitutes a part of the apparatus shown in FIG. 5, wherein FIG. 6A is a sectional side view, and FIG. 6B is a sectional view viewed from the back side. is there.
7 is a view for explaining the positioning operation in the diameter reduction process of the apparatus shown in FIG. 5, and (a), (b), and (c) are side sectional views showing the operation, respectively.
FIG. 8 is a perspective view showing another embodiment of the ridge guide wall.
FIG. 9 is a perspective view showing still another embodiment of a ridge guide wall.
[Explanation of symbols]
M Magazine
S snap ring
S1 split
H Height of ridge guide wall
W Work
W1 mounting groove
P1 termination
10 Transport means
11 Transport base
12 Guide
13 Transport path
15 Cutout plate
20, 200, 210 Positioning means
21, 201, 211 ridge guide wall
21a, 201a, 211a Upper end
22 Inclined surface
30 Positioning means
31 Rotation restriction pin (regulation member)
40 Diameter reduction means
41 Reduced diameter guideway
41a Top opening
41b Lower opening
41c Notch hole
42 Pressing shaft (pressing member)
50 Insertion means
51 Insertion tube
51a, 51b passage
51b ′, 51b ″ opening
52,55 slider
53 Insertion shaft (pushing member)
54 Fixing member
56 Coil spring
60 tables
61 Jig
202 flat surface
212 Inclined surface
300 Positioning means
303 Rotation restriction plate (regulation member)
304 Coil spring

Claims (6)

Conveying means for conveying a C-shaped snap ring having a dividing slot along a predetermined conveying path, positioning means for positioning the direction of the dividing slot in a predetermined direction when moving the snap ring, and conveying by the conveying means The snap ring is automatically mounted on the workpiece, with a diameter reducing means for reducing the diameter of the snap ring and an insertion means for inserting the snap ring reduced in diameter by the diameter reducing means into the mounting groove of the workpiece. A snap ring mounting device,
It said positioning means includes a protruding guide wall formed to protrude substantially vertically upward snap ring with a width which can enter between the split opening to lead to a predetermined position of the diameter reduction device from the transport path,
An inclined surface that is inclined downward toward the terminal end side from which the snap ring is detached is formed on the side portion of the ridge guide wall from the conveyance path side.
A snap ring mounting device characterized by that. The ridge guide wall has a horizontal portion formed at the same height following the conveyance path, and an upper end portion formed to be inclined downward from the horizontal portion .
The snap ring mounting device according to claim 1. The diameter reducing means includes a reduced diameter guide path formed narrower than the outer diameter of the snap ring from an upper opening wider than the outer diameter of the snap ring toward the lower opening, and a snap ring in the reduced diameter guide path. A pressing member formed so as to be capable of reciprocating to press from the radial direction,
The snap ring mounting device according to claim 1, wherein the snap ring mounting device is provided. The positioning means has a regulating member that enters the slot of the snap ring and regulates its rotation in the reduced diameter guide path.
The snap ring mounting device according to claim 3. The conveyance path is formed substantially horizontally ,
End portion of the front Symbol the protruding guide wall is formed at a position facing the upper opening of the reduced surface riding path,
The reduced-diameter guide path is formed to extend in a substantially vertical direction,
The insertion means includes a pushing member that pushes the snap ring toward the mounting groove of the workpiece in a state where the central axis of the reduced diameter snap ring faces a substantially horizontal direction.
The snap ring mounting device according to claim 3 or 4, characterized by the above. The height of the ridge guide wall from the inclined surface is formed at a height at which the snap ring is separated from the inclined surface at the position of the terminal portion where the snap ring is detached from the ridge guide wall.
The snap ring mounting device according to claim 1, wherein the snap ring mounting device is provided.

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