JPH0429951Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field The present invention provides a rocker arm shaft with a plurality of first rocker arms corresponding to one of an exhaust valve and an intake valve, a plurality of cam holders, and a rocker arm. In addition to assembling parts such as a coil spring that surrounds the shaft and is interposed between each first rocker arm, a shaft that corresponds to the other of the exhaust valve and intake valve and that has both ends fitted into the cam holder is installed between each cam holder. The present invention relates to a rocker arm shaft assembling device for assembling a second rocker arm through which the rocker arm is inserted.

(2) Conventional technology Conventionally, when assembling such a rocker armshaft, each of the above-mentioned parts was inserted one by one into the rocker armshaft in a fixed state. It is done by hand.

(3) Problems to be solved by the invention However, in the above-mentioned conventional method in which each part was fitted and assembled one by one into the rocker arm shaft, the efficiency of the assembly work was poor.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a rocker arm shaft assembling device that can efficiently assemble each component to a rocker arm shaft.

B. Structure of the invention (1) Means for solving the problem The device of the invention includes a plurality of base plates arranged in parallel at intervals and capable of moving toward and away from each other in order to position and place each cam holder. , a spring interposed between each base plate to maintain the distance between the base plates, and a plurality of movable units arranged between each base plate to enable movement in a direction parallel to the direction of movement of each base plate. A plurality of first mounting jigs are arranged between each base plate to position and place components such as a first rocker arm and a coil spring to enable lifting and lowering operations, and a plurality of first mounting jigs are placed between the base plates adjacent to each other on both sides. a spacing adjustment rod attached to the first mounting jig so as to be in contact with the first mounting jig; a plurality of second mounting jigs mounted movably up and down on the movable plate for positioning and mounting components such as the second rocker arm; Each base plate is provided to clamp the cam holder between a support plate provided on the movable plate to maintain the posture of each second rocker arm supported by the cam holder via the shaft when the mounting jig is lowered, and each base plate. a first clamper that is movable integrally with the first mounting jig and has a posture holding plate for maintaining the posture of the first rocker arm supported by the rocker arm shaft when the first mounting jig is lowered;
a second clamper capable of clamping the second rocker arm etc. with the mounting jig and capable of following the movement of the second rocker arm with its clamping force;
A third clamper capable of clamping the first rocker arm, coil spring, etc. between the mounting jig and the cam holder into which the rocker arm shaft is inserted is provided with a base plate and each of the mounting jig. a positioning part including a width shifting drive means capable of driving the tool; a holder that removably holds one end of the rocker arm shaft; and a drive means coupled to the holder for inserting the holder.

(2) Effect According to the above configuration, the rocker arm shaft is inserted into the parts such as the first rocker arm, cam holder, and coil spring that are positioned by the positioning part, and the second rocker arm shaft is inserted into the parts such as the first rocker arm, the cam holder, and the coil spring, which are positioned by the positioning part, and the second rocker arm shaft is inserted into the parts such as the first rocker arm, the cam holder, and the coil spring, which are positioned by the positioning part. A rocker arm is connected to the cam holder via a shaft. Therefore, each part can be efficiently assembled to the rocker armshaft. Furthermore, in the positioning section, the cam holder into which the rocker arm shaft is inserted is moved by the width shifting drive means, so each component is guided by the rocker arm shaft and smoothly shifted, and the coil spring between the first rocker arms Since it is compressed while surrounding the ROTSUKA armshaft, it will not twist. Further, the distance between the base plates is maintained appropriately by a spacing adjustment rod provided on the first mounting jig, and when the width of the base plates is adjusted, the width of the base plates can be adjusted by lowering the first mounting jig. Furthermore, the first rocker arm, which is suspended in the air by the rocker arm shaft due to the lowering of the first mounting jig, is held in its correct posture by the posture holding plate, and the lowering of the second mounting jig causes the first rocker arm to be suspended in mid-air on the rocker arm shaft. The second rocker arm, which is suspended in the air by the cam holder, is held in its correct position by the support plate.

(3) Embodiment An embodiment of the present invention will be explained below with reference to the drawings. First, in FIG. A drive unit I is provided.

Referring also to FIG. 2, in the positioning part P,
Exhaust valve rocker arms 1a to 1h as eight first rocker arms, each corresponding to a pair of exhaust valves (not shown) disposed in each cylinder of the four-cylinder engine, and six cam holders 2a to 2.
f, five coil springs 3a to 3e, and a pair of intake valves (not shown) disposed in each of the cylinders.
Eight intake valve rocker arms 4a to 4h as second rocker arms are positioned and arranged, respectively corresponding to the eight second rocker arms. In addition, the locker arm 4a for the intake valve is connected between the cam holders 2a and 2b.
A shaft 5a for supporting the intake valve rocker arms 4b, 4c, 4d, 4e, 4 is inserted in advance.
Cam holders 2b, 2c, 2c, 2 are attached to f and 4g.
Shafts 5b, 5 for supporting between d, 2d, 2e
c and 5d are inserted in advance, and a shaft 5e for supporting between the cam holders 2e and 2f is inserted in advance into the intake valve rocker arm 4h. Moreover, axis 5
A wave washer 6a interposed between the cam holder 2a and the intake valve rocker arm 4a is fitted into the shaft a, and the shafts 5b, 5c, and 5d have the intake valve rocker arms 4b, 4c, 4d, 4e, 4f,
Wave washers 6b, 6 interposed between 4g
c and 6d are fitted into the shaft 5e, and an intake valve locking arm 4h and a cam holder 2f are inserted into the shaft 5e.
A wave washer 6e interposed therebetween is inserted.

By driving the rocker arm shaft 7 by the insertion drive part I in a state where it is positioned by the positioning part P in this way, the rocker arm shaft 7 is moved to the exhaust valve rocker arms 1a to 1.
h, cam holders 2a to 2f and coil spring 3a
~3e is inserted.

Referring also to FIG. 3, the positioning part P includes base plates 8a to 8f arranged in parallel so that each cam holder 2a to 2f can be positioned and mounted individually, and can be brought close to and separated from each other, and a base plate for intake valves. Lotsuka arm 4
While positioning and mounting the a to 4h, the base plate 8a to
A second mounting jig 9 arranged to enable horizontal movement in a direction parallel to the arrangement direction of 8f and lifting/lowering operation.
The cam holder 2a is mounted between the first mounting jigs 10a to 10e, which are arranged to position and mount the exhaust valve rocker arms 1a to 1h and enable vertical movement, and each of the base plates 8a to 8f. -2f, second clampers 12a-12e capable of clamping the intake valve rocker arms 4a-4h between the second mounting jigs 9a-9e, and First mounting jig 10
Exhaust valve rocker arm 1a~ between a~10e
Third clampers 13a to 13 capable of clamping 1h
e, and a width-adjusting drive means 14 for driving each of the base plates 8a to 8f so that the mutual spacing becomes small.

Each of the base plates 8a to 8f is formed in a substantially L-shape in a vertical plane perpendicular to the arrangement direction thereof, and is arranged in this order above the substrate 15 with intervals between them. Moreover, the base plate 8f at one end along the arrangement direction is fixed on a fixed substrate 15. A guide plate 16 extending along the arrangement direction of each of the base plates 8a to 8f is fixed on the substrate 15,
A pair of guide rails 17, 17 are fixed to one side of the guide plate 16, extending vertically and in parallel with an interval therebetween. Furthermore, sliders 18, 18, which are slidably fitted into the respective guide rails 17, 17, are fixed to each of the base plates 8a to 8e, excluding the base plate 8f, which is fixed to the base plate 15, respectively. Therefore, each of the base plates 8a to 8e is movable along the arrangement direction, and each of the base plates 8a to 8f can be moved toward and away from each other.

In FIGS. 4 and 5, each base plate 8a to 8
Cam holders 2a to 2f can be individually positioned at the upper tip of f. That is, the base plates 8a, 8 at both ends along the arrangement direction of each base plate 8a to 8f
As shown in FIG. 4, a pair of positioning holes 19, 19 are bored in the top surface of the tip end at f, respectively, in order to position and place the cam holders 2a, 2f, respectively.
The cam holders 2a, 2f, to which positioning pins 20, 20 are fitted in advance, are attached to the base plates 8a, 8.
They are individually placed on the upper surface of f. Further, as shown in FIG. 5, cam holders 2b,
A pair of positioning holes 21, 21 are drilled in order to position and place 2c, 2d, and 2e, respectively, and positioning pins 22, 22 that fit into these positioning holes 21, 21 are fitted in advance. Cam holders 2b to 2e are individually placed on the upper surface of each base plate 8b to 8e.

Above the base ends of the base plates 8a to 8f, each base plate 8a
A horizontal shaft 23 is disposed along the arrangement direction of ~8f, and both ends of this shaft 23 are rotatably supported on the upper portions of columns 24 and 25 erected on the substrate 15. The shaft 23 is formed with protrusions 23a at a plurality of locations, for example three locations, in the circumferential direction, and is capable of relative movement in the axial direction with the shaft 23, and is prevented from relative rotation around the axis. Five linear sliders 26 are respectively fitted to the shaft 23, and each linear slider 26 is provided with a first clamper 11a to 11e.
are fixed respectively. Moreover, each linear slider 26 is rotatably held by a holding member 27 fixed to the upper surface of the base of the base plates 8a to 8e, so that each linear slider 26 is rotatably held in accordance with the movement of the base plates 8a to 8e. The first clampers 11a to 11e also move along the axial direction of the shaft 23. Further, only the first clamper 11f at a position corresponding to the base plate 8f is fixed to the shaft 23.

One end of a link 28 is fixed to the end of the shaft 23 protruding from the support column 25, and the other end of the link 28 is a first rotation cylinder 29 supported by the base plate 15 and having an axis extending vertically. The piston rod 29a is connected to the tip of the piston rod 29a. Therefore, the first
The shaft 23 rotates in accordance with the expansion and contraction operation of the rotation cylinder 29, and each of the first clampers 11a to 11
f also rotates.

A pair of guide tubes 31 that vertically penetrate through each of the first clampers 11a to 11f are fixed to each of the first clampers 11a to 11f, and each of the guide tubes 31 has a pressing member 32 that can come into contact with the upper surface of the cam holders 2a to 2f, respectively. A spring 34 is compressed between the cover body 33 and the pressing member 32, which are slidably fitted together and screwed onto the upper part of each guide cylinder 31. Therefore, when each first clamper 11a to 11f is rotated close to the base plate 8a to 8f, each cam holder 2a to 2f
are elastically clamped between the base plates 8a to 8f and the corresponding pressing members 32.

In FIG. 6, the positions of the base plates 8a to 8f along the axis 23 are such that second mounting jigs 9a to 9 are located between them.
e and the first mounting jigs 10a to 10e are held by a spring force so as to be spaced apart from each other.
That is, the base plates 8a and 8f have adjacent base plates 8a and 8f.
A rod 35 that can come into contact with b, 8e is attached to each base plate 8a~
It is inserted movably in the same direction as the arrangement direction of 8f,
A retaining ring 36 that can engage with the base plates 8a, 8f is fitted to one end of each rod 35 on the side opposite to the base plates 8b, 8e. Further, a spring 37 is compressed between the other end of each rod 35 and the base plates 8a, 8f, and each rod 35 is elasticized in a direction in which the other end thereof comes into contact with the base plates 8b, 8e. energized. Furthermore, one or two rods 35 are moved on the remaining base plates 8b to 8e, which are biased by a spring 37 in the same way as the rods 35 and have retaining rings 36 that engage with each of the base plates 8b and 8e. These rods 35 and springs 37 maintain the distance between the base plates 8b to 8e. That is, the space between the base plates 8a and 8b is held by the rod 35 inserted through the base plate 8a coming into contact with the base plate 8b, and the space between the base plates 8b and 8c, between 8c and 8d, and between the base plates 8a and 8b is held.
Between d and 8e, each base plate 8b, 8c, 8c, 8d,
Rods 35 and 3 inserted into 8d and 8e respectively
5 is held by abutting coaxially, and the base plate 8
The space between e and 8f is held by the rod 35 inserted through the base plate 8f coming into contact with the base plate 8e.

In this way, the spacing between the base plates 8a to 8f is maintained by the rod 35 biased by the spring 37, but by pressing the base plate 8a at one end, each of the base plates 8a to 8f As shown in the figure, each spring 37 can be moved so as to be closer to each other while being contracted.

Referring to FIG. 7, between each base plate 8a to 8f,
Moving plates 38 are respectively arranged. These movable plates 38 are arranged to face the other side of the guide plate 16, and each movable plate is attached to a guide rail 39 fixed to the other side of the guide plate 16 in parallel with the guide rails 17, 17. Sliders 40 fixed to 38 are movably fitted to each other. Therefore, each movable plate 38 is movable in a direction parallel to the arrangement direction of the base plates 8a to 8f and is disposed between the base plates 8a to 8f.

Each movable plate 38 is fixedly provided with an upwardly extending abutting plate 41, and rods 42, 42 elastically abut the abutting plate 41 from both sides, thereby adjusting the position of each movable plate 38. It is held in the center between each base plate 8a to 8f. That is, the base plates 8a and 8f have base plates 8b and 8e at one end on the opposite side from the base plates 8b and 8e.
A rod 42 fitted with a retaining ring 43 that can be engaged with the rod 42 is movably inserted so that its other end comes into contact with the contact plate 41, and there is a gap between the other end of the rod 42 and the base plates 8a and 8f. The spring 44 is compressed. Further, pairs of rods 42, which are biased by springs 44 in the same way as the rods 42 described above, are inserted through the base plates 8b to 8e, and these rods 42 are resiliently abutted against the abutting plates 41, respectively.

As a result, each movable plate 38 is held in the center between the base plates 8a to 8f, but by pressing the base plate 8a at one end, each of the base plates 8a to 8f is While contracting the spring 44, the base plates 8a to 8f and the movable plates 38 move closer to each other.

Each movable plate 38 supports an elevating member 45 so as to be movable up and down, and these elevating members 45
Second mounting jigs 9a to 9e are fixedly installed at the upper end of each of the second mounting jigs 9a to 9e. That is, elevating guide rails 46 extending vertically are fixed to the side surface of each movable plate 38 opposite to the guide plate 16, and sliders 47 fixed to each elevating member 45 are attached to these elevating guide rails 46. are slidably fitted to each other. Furthermore, stoppers 48 that can come into contact with the lower ends of the lifting guide rails 46 are fixed to the lower ends of the lifting members 45, so that each lifting member 45
The upper limit position of is defined.

8, 9 and 10, the second
Mounting jigs 9a, 9e and second mounting jigs 9b~
9d basically has the same shape, but the second mounting jigs 9a and 9e are used to individually position and mount the intake valve rocker arms 4a and 4h, whereas the remaining Second mounting jig 9b to 9d
is a pair of intake valve rocker arms 4b, 4.
c, 4d, 4e, 4f, and 4g are formed for positioning and mounting, respectively.

The second mounting jigs 9a and 9e are mounted on lifting members 45 to face each other on both sides of the intake valve rocker arms 4a and 4h.
It has a pair of support plates 51, 51 integrated with
At the upper ends of these support plates 51, 51 are shafts 5 that are inserted into intake valve rocker arms 4a, 4h.
Placing grooves 52 each having a substantially V-shape are formed in order to place the plates a and 5e. Further, the second mounting jigs 9b to 9d are provided with a pair of intake valve rocker arms 4.
b, 4c, 4d, 4e, 4f, and 4g have a pair of supporting plates 51, 51 facing each other on both sides, and each supporting plate 5
Approximately V-shaped mounting grooves 52 for mounting the shafts 5b to 5d are formed at the upper ends of the shafts 1 and 51, respectively.

Therefore, the intake valve rocker arms 4a, 4b,
4c, 4d, 4e, 4f, 4g, 4h, the shafts 5a to 5e inserted therein are placed in the mounting grooves 52, 5.
2, each of the second mounting jigs 9a to 9
It will be positioned and placed at e.

By the way, as described later, each of the axes 5a to 5e
are supported by the cam holders 2a to 2f, the second mounting jigs 9a to 9e are lowered, and at this time each intake valve rocker arm 4a to 4h is attached to the shaft 5.
It is supported between cam holders 2a to 2f via a to 5e. In this state, each intake valve rocker arm 4a to 4h is heavier on the side where the tappet screw 53 is provided, so
It rotates around each of the axes 5a to 5e, and a constant posture is no longer maintained. Therefore, each moving plate 38 has
Support rods 54 extending upward are fixed, and at the upper ends of these support rods 54 there is a support plate 5 which abuts each intake valve rocker arm 4a to 4h from below at the portion where the tappet screw 53 is screwed.
5 are fixed respectively.

Brackets 56 that sandwich the elevating member 45 from both sides are fixed to each movable plate 38, and a first elevating cylinder 57 having an axis extending vertically is fixed and supported on each of the brackets 56. Piston rod 57 in the first lifting cylinder 57
Engagement members 58 are fixed to the tips, that is, the upper ends of a, and these engagement members 58 are attached to the mounting jig 9a.
~9e, respectively. Therefore, according to the expansion and contraction operation of the lifting cylinder 57, the second mounting jig 9a
~9e operates to raise and lower.

Referring again to FIGS. 1 and 3, the shaft 2
3, a shaft 61 parallel to the shaft 23 is disposed on the opposite side of each of the second mounting jigs 9a to 9e, and one end of this shaft 61 is connected to a support 6 erected on the substrate 15.
The other end of the shaft 61 is rotatably supported by the support 25 which supports the shaft 23. Similar to the shaft 23, this shaft 61 has protrusions 61 at a plurality of locations, for example, three locations in the circumferential direction.
Five linear sliders 63, which are formed with a diameter of
1, and second clampers 12a to 12e are fixed to each linear slider 63, respectively.

One end of a link 64 is fixed to the end of the shaft 61 protruding from the support column 62, and the other end of the link 64 is connected to a second rotation cylinder 65 supported by the base plate 15 and having an axis extending vertically. The tips of the piston rods 65a are connected to each other. Therefore, the second
The shaft 61 rotates in accordance with the expansion and contraction operation of the rotation cylinder 65, and each of the second clampers 12a to 12
f also rotates.

The bottom surface of the tip of each of the second clampers 12a to 12f is made of an elastic material so as to resiliently abut on the top surface of the intake valve rocker arms 4a to 4h mounted on the second mounting jigs 9a to 9e, respectively. A pressing member 66 consisting of is fixed to each. Therefore, each of the second clampers 12a to 12f is mounted on the second mounting jig 9a to
When the intake valve rocker arms 4a to 4h are rotated toward the 9f side, the intake valve rocker arms 4a to 4h are elastically pressed against the second mounting jigs 9a to 9f and are clamped.

One end of a shaft 67 parallel to the shaft 61 is fixed to the support column 25, and a stopper 68 is fixed to the other end of the shaft 67. Furthermore, five holding members 69 that rotatably hold each of the linear sliders 63 are movably fitted into the shaft 67.
A spring 70 that surrounds the shaft 67 is contracted between the two. These springs 70 cause each holding member 6
9, that is, the distance between the linear sliders 63 is maintained, and the second clampers 12a to 12e are held at positions corresponding to the second mounting jigs 9a to 9e. Moreover, each clamper 12a to 12e has a base plate 8a to 8
It is possible to move according to the movement of the intake valve rocker arms 4a to 4h which are elastically in contact with each other during the movement of e.

Referring also to FIG. 11, each first mounting jig 1
0a to 10e are each fixedly installed at the upper end of the elevating member 71, and each elevating member 71 is arranged to be movable up and down at a position corresponding to the center between each base plate 8a to 8f when in the original position. Ru. Supports 72 are erected on the base plate 15 in correspondence with the respective elevating members 71, and sliders 74 are fixed to each elevating member 71 on elevating guide rails 73 extending vertically and fixed to each support post 72. are slidably fitted. Further, a bracket 75 is fixed to each support column 72, which sandwiches the elevating member 71 from both sides.
5 respectively support second lifting cylinders 76 having axes extending vertically. Engagement members 77 are fixed to the tips or upper ends of the piston rods 76a in these second elevating cylinders 76, and each engaging member 77 is engaged with the upper part of the elevating member 71, respectively. Moreover, a stopper 78 that can come into contact with the lower end of the elevating guide rail 73 is fixed to the lower end of the elevating member 71, and when this stopper 78 abuts against the lower end of the elevating guide rail 73, the upper limit position of the elevating member 71 is defined. Ru.

At the top of each elevating member 71, there is a spacing adjustment rod 79 that brings both ends into contact with the adjacent base plates 8a to 8f.
are urged in one direction in the axial direction by a spring 80 interposed between the elevating member 71 and allowed to move in the axial direction within a limited range, and are inserted. Therefore, with both ends of the spacing adjustment rod 79 in contact with the base plates 8a to 8f, each of the base plates 8a to 8f
The position of is determined.

In FIGS. 12, 13 and 14,
The first mounting jigs 10b to 10d are formed to position and mount each pair of exhaust valve rocker arms 1b, 1c, 1d, 1e, 1f, and 1g with coil springs 3b to 3d interposed therebetween. and are fixedly installed at the upper end of the elevating member 71, respectively. each first
The mounting jigs 10b to 10d are box-shaped and include a pair of support plates 81 and 81 that sandwich the exhaust valve rocker arms 1b to 1g from both sides and each has a substantially U-shaped groove 82 at its upper end. mounting member 8
3 and 83 are connected by a spring receiving member 84 having a spring receiving surface 84a curved in a substantially U-shape on the upper surface on which the coil springs 3b to 3d are placed. Each mounting member 83, 83 has an exhaust valve rocker arm 1b.
-1g are placed on the spring receiving surface 84a, and the coil springs 3b-3d are placed on the spring receiving surface 84a, respectively.

The first mounting jigs 10a, 10e are formed by connecting the single mounting member 83 and the spring receiving member 84, and position and mount the exhaust valve rocker arms 1a, 1h and the coil springs 3a, 3e, respectively. be done.

By the way, in the process of inserting the rocker arm shaft 7 into each of the exhaust valve rocker arms 1a to 1h, the first mounting jigs 10a to 10e are lowered, and at that time,
The exhaust valve rocker arms 1a to 1h are supported by a rocker arm shaft 7. In such a state, since the side on which the tappet screw 85 is screwed is heavier, each exhaust valve rocker arm 1a to 1h rotates around the rocker arm shaft 7 and maintains a constant posture. It disappears. Therefore, the first clampers 11b to 11e include an exhaust valve rocker arm 1.
Posture retaining plates 86 which come into contact with the upper surface of the portions opposite to the tappet screws 85 of a to 1h to prevent rotation extend on both sides and are fixed to each side.

The third clampers 13a to 13e correspond to the support columns 7.
A piston rod 87a of a third rotation cylinder 87 supported by a clevis at the lower part of the column 72 is connected to the base of each of the third clampers 13a to 13e. Further, at the tips of the third clampers 13b to 13d, a first
Exhaust valve rocker arms 1b, 1c, 1d, 1 positioned and mounted on mounting jigs 10a to 10e
A pair of pressing members 88, 88 made of an elastic material that elastically abuts on the upper surfaces of e, 1f, 1g, and a spring holding member 89 that holds the coil springs 3b to 3d are provided between the spring receiving surface 84a. At the tips of the third clampers 13a, 13e, mounting jigs 10a,
A pressing member 88 elastically contacts the upper surface of the exhaust valve rocker arms 1a and 1h positioned and mounted on the exhaust valve rocker arm 10e, and a spring holding member 89 that holds the coil springs 3a and 3e between the spring receiving surface 84a. is provided.

In FIG. 15, the width shifting driving means 14 for driving the base plates 8a to 8f in a direction in which they approach each other has an axis along the arrangement direction of the base plates 8a to 8f, and an outer surface of the base plate 8a. a pressing cylinder 92 disposed opposite to the pressing cylinder 9;
2, a support tube 93 fixed to the tip of the piston rod 92a; and a press rod 94 supported by the support tube 93 so as to be movable on the same axis as the piston rod 92a so as to bring one end into contact with the outer surface of the base plate 8a. and a spring 95 compressed between one end of the pressing rod 94 and the support cylinder 93.

The pressing cylinder 92 is supported and fixed on the substrate 15. Further, the support tube 93 is screwed onto the tip of the piston rod 92a with its closed end side facing the base plate 8a, and the pressing rod 94 is screwed onto the tip of the piston rod 92a.
It is inserted into the closed end of No. 3 so as to be freely movable in the axial direction.
Furthermore, a retaining ring 96 that can come into contact with the closed end of the support tube 93 is fitted to the rear end of the pressing rod 94 that has protruded into the support tube 93.

16 and 17, the insertion drive unit I includes a holder 101 that removably holds one end of the rocker arm shaft 7, and a holder 101 that removably holds one end of the rocker arm shaft 7.
The drive means 102 is connected to the holder 101 and is capable of driving the holder 101 in the axial direction and in the angular displacement.

The driving means 102 includes a first guide plate 103 erected on a base plate 15 , a running member 104 that can run while being guided by the first guide plate 103 , and a holder 101 connected to the tip thereof to rotate the running member 104 . A rotary shaft 105 that is movably supported, an arm 107 having a roller 106 as a cam follower at its tip and fixed to the intermediate portion of the rotary shaft 105, and a cam groove in which the roller 106 is rotatably fitted. a cam plate 109 having a cam plate 108 and fixedly installed on the upper part of the first guide plate 103; and a drive motor 1 for driving the traveling member 104 to travel.
10.

The first guide plate 103 is connected to the width shifting drive means 14.
The first cylinder 92 is elongated in a direction parallel to the axis of the cylinder 92 and fixed on the substrate 15.
A pair of upper and lower guide rails 111, 111 are fixed to one side of the guide plate 103 in parallel with the axis of the pressing cylinder 92. Furthermore, sliders 112, 112 are fixed to the traveling member 104, and the sliders 112, 112 are slidably fitted to the respective guide rails 111, 111.
It is possible to drive along 1,111. Also, between both guide rails 111, 111, the first guide plate 103
Both ends of a ball screw 113 having an axis parallel to the guide rails 111, 111 are rotatably supported, and the ball screw 113 passes through the running member 104. Moreover, the running member 104 has
A nut member 114 screwed into the ball screw 113
is fixed to the ball screw 113, and a drive motor 110 is connected to one end of the ball screw 113. Therefore, by rotationally driving the ball screw 113 with the drive motor 110, the traveling member 104 is moved to the guide rail 11.
1,111.

The cam plate 109 is formed to be long along the longitudinal direction of the first guide plate 103, and the stopper surface 115 that comes into contact with the base plate 8a when each of the base plates 8a to 8f is in the original position is the cam plate. The guide plate 109 is formed at one end of the guide plate 109 and is fixed to the upper part of the first guide plate 103 . A cam groove 108 is formed on the side surface of the cam plate 109 on the side where the guide rails 111, 111 are disposed.
are formed to meander up and down along the longitudinal direction of the guide rails 111, 111.

Referring to FIG. 18 and FIG. 19 together, on the upper part of the traveling member 104, each of the guide rails 1
11, 111 is rotatably supported. That is, the rotation axis 105 is the cylindrical part 10
5a and a prismatic portion 105b are coaxially connected, and the cylindrical portion 1 at this rotation axis 105
Both ends of 05a are rotatably supported on the upper part of the traveling member 104 while being prevented from moving in the axial direction. Moreover, in the upper part of the traveling member 104,
An opening 116 that opens toward the cam plate 109 is provided in a portion corresponding to the cylindrical portion 105a, and an arm 107 whose base end is fixed to the intermediate portion of the cylindrical portion 105a extends from the opening 116 to the cam plate 109. 109
A roller 106 that can roll within the cam groove 108 is rotatably supported at the tip of the arm 107.

With the above configuration, as the traveling member 104 travels along the guide rails 111, 111, the rotation shaft 105 reciprocates around its axis.

The holder 101 is formed into a prismatic shape with a fitting hole 117 having a circular cross section into which one end of the rocker arm shaft 7 can be fitted. The holder 101 and the prismatic portion 105b are fitted together to allow relative axial movement within a limited range at the tip, and a spring 121 that surrounds the cylindrical portion 105a is contracted between the holder 101 and the prismatic portion 105b. Therefore, the holder 101 is urged forward. This holder 101 has
An insertion hole 118 extending vertically is bored at a position offset from the axis of the fitting hole 117, and the holder 101
A connecting cylinder 120 that can extend and contract a connecting pin 119 that can be inserted into the insertion hole 118 is provided on the upper part of the connecting cylinder 120.
is fixedly arranged coaxially with the insertion hole 118. The holder 101 moves forward by supporting the rocker arm shaft 7 as described later, but in order to define the limit of advancement of the holder 101 at that time, the base plate 8a has a plate that can come into contact with the front surface of the holder 101. Stopper 122 is fixed.

By the way, the rocker arm shaft 7, whose one end is detachably held by the holder 101, is formed in a cylindrical shape to form an oil passage for supplying lubricating oil, and the rocker arm shaft 7 has the above-mentioned oil on the side part. A plurality of semicircular notches 7a communicating with the oil passage are provided at intervals in the axial direction. The connecting pin 119 is inserted into the insertion hole 118 when one end of the rocker arm shaft 7 is fitted into the holder 101.
Notch 7a near one end of Rotsuka armshaft 7
It works to connect the holder 101 and the rocker arm shaft 7.

When holding the rocker arm shaft 7 with the holder 101, the insertion drive unit I moves the holder 10
A holding mechanism 123 is provided to position and hold the rocker arm shaft 7 in front of the holder 1, and to operate so as not to impede the forward movement of the holder 101 when the holder 101 moves forward.

This holding mechanism 123 includes a pair of moving members 124, 124 that can integrally move in a direction parallel to the moving direction of the front traveling member 104, and a rocker arm shaft 7 that can be placed thereon.
Mounting plates 125, 125 are rotatably supported on the upper parts of the movable members 124, 124, respectively, and rotating plates are mounted on the upper parts of the moving members 124, 124, respectively, in order to clamp the rocker arm shaft 7 between the mounting plates 125, 125. A fourth movably supported clamper 126, 12
6.

A second guide plate 127 extending parallel to the first guide plate 103 is fixed on the substrate 15, and a pair of upper and lower guide rails 128, 128 are fixed to one side of the second guide plate 127. . Further, each moving member 124, 124 has the guide rail 12
A pair of sliders 129, 129, which are slidably fitted in the sliders 8, 128, are fixed respectively, and both moving members 124, 124 are connected to each other by a pair of connecting rods 130, 130. Therefore, both moving members 124, 124 can move integrally along guide rails 128, 128.

Each of the mounting plates 125, 125 is formed into a substantially "dog" shape, and the middle part thereof is connected to the guide rail 125.
The moving members 124, 124 are rotatably supported on the upper part of each moving member 124, 124. A substantially V-shaped mounting groove 131 for mounting the rocker arm shaft 7 is provided on the upper surface of one end of each of these mounting plates 125, 125, respectively. Also, the mounting plate 12
The other end of 5, 125 is connected to each moving member 124, 124.
The third rotary cylinders 132, 132 are respectively connected to the tips or upper ends of piston rods 132a, 132a in third rotation cylinders 132, 132, which are supported by the lower portions of the piston rods and extend vertically. Therefore, the third rotating cylinder 1
By telescopically operating the mounting plates 125 and 132, the mounting plates 125 and 125 are placed in their mounting grooves 131.
It is rotated between an upper limit position where the axis of the rocker arm shaft 7 placed thereon and the fitting hole 117 of the holder 101 are the same axis, and a lower limit position where the forward movement of the holder 101 is not hindered.

Furthermore, an engaging pin 133 is provided protruding from one end of the mounting plate 125 closer to the holder 101 to fit into the notch 7a of the rocker arm shaft 7 placed in the mounting groove 131 from below.

The fourth clampers 126, 126 are formed in a substantially T-shape, and the intermediate portion thereof is connected to the mounting plate 125,
It is rotatable about an axis parallel to the rotational axis of 125 and is supported on the upper part of the moving members 124, 124. Moreover, a holding member 134 is fixed to one end of each of the fourth clampers 126, 126, and these holding members 134 are attached to the fourth clamper 126.
When the mounting plates 6 and 126 are rotated close to the mounting plates 125 and 125, they face the upper side surface of the rocker arm shaft 7. At the other ends of these fourth clampers 126, 126, fourth rotation cylinders 135, 1 are supported at the lower part of the moving members 124, 124 and extend up and down.
Piston rods 135a, 135a in 35
The tips or upper ends of the two are connected. Therefore, by telescopically operating the fourth rotation cylinders 135, 135, the fourth clampers 126, 126
The lower limit position where a slight gap is created between the upper surface of the rocker arm shaft 7 placed on the mounting grooves 131, 131 and the holding members 134, 134, and the holder 1
It is rotated between the upper limit position that does not hinder the forward movement of 01.

Moreover, the fourth clamper 1 is closer to the holder 101.
An engaging pin 136 is provided at one end of 26 to protrude from above and fit into the notch 7a of the rocker arm shaft 7 placed in the mounting groove 131, and faces the fitting pin 133.

In the second guide plate 127, a pulling cylinder 137 having an axis parallel to the guide rails 128, 128 is supported and fixed at the end closer to the holder 101.
The tip of the piston rod 137a at 7 is connected to the moving member 124.

Next, to explain the operation of this embodiment, in the positioning part P during assembly, the first mounting jigs 10a to 10e and the second mounting jigs 9a to 9e are at the upper limit position, and the first and second mounting jigs 10a to 10e are at the upper limit position, Second and third clampers 11a-11f, 12a-12f, 13a-13
e is opened upward, and in the insertion drive unit I, the mounting plates 125, 125 are at the upper limit position, the fourth clampers 126, 126 are opened upward, and the holder 101 is also at the backward limit position. be.

In this state, the intake valve rocker arms 4a to 4h, on which the shafts 5a to 5e, into which the wave washers 6a to 6e are fitted, are attached to the positioning part P.
The cam holders 2a to 2f, the exhaust valve rocker arms 1a to 1h, and the coil springs 3a to 3e are carried in by a chuck conveying device (not shown), and each clamper 11a to 11f, 12a to 12
By closing f, 13a to 13e, the respective parts are positioned in the positioning part P in the arrangement shown in FIG. 2a.

On the other hand, the rocker arm shaft 7 is connected to the mounting groove 13 of both mounting plates 125, 125 in the insertion drive section I.
1, 131 by a chuck conveying device (not shown), placed on the mounting grooves 131, 131, and then positioned by closing the fourth clampers 126, 126.

When the positioning and holding of the rocker arm shaft 7 to the holding mechanism 123 of the insertion drive section I is completed, the operation of the drive motor 110 is started, and the driving member 104
That is, the holder 101 moves forward and the holding mechanism 123
One end of the rocker arm shaft 7 held by the locker arm shaft 7 fits into the fitting hole 117 of the holder 101. Thereafter, the connecting cylinder 120 is extended, so that the connecting pin 119 fits into the insertion hole 118 and the notch 7a, and one end of the locking arm shaft 7 prevents the rotational movement of the holder 101.
connected to.

After connection with the holder 101, the locking arm shaft 7 also moves forward according to the forward movement of the holder 101, but the locking arm shaft 7 is held by a holding mechanism 123, and the holding mechanism 123 is
It is movable along guide rails 128, 128. Therefore, the holding mechanism 123 moves forward against the pulling force of the pulling cylinder 137.

When the other end, that is, the front end of the rocker arm shaft 7 is slightly inserted into the cam holder 2a due to the forward movement, the operation of the drive motor 110 and the contraction operation of the pulling cylinder 137 are stopped. At this time, the pulling force by the pulling cylinder 137 is inferior to the forward force of the holder 101 by the drive motor 110 as described above, so the piston rod 137 in the pulling cylinder 137
a remains prominent. After the drive motor 110 and the pulling cylinder 137 stop operating in this way, the third and fourth rotation cylinders 132,
132, 135, 135 are activated, each mounting plate 12
5, 125 rotates to the lower limit position, and each clamper 126, 126 rotates to the upper limit position,
The forward movement of the holder 101 is not hindered. Thereafter, the pulling cylinder 137 is contracted, and the holding mechanism 123 returns to its original position.

Locker arm shaft 7 by holding mechanism 123
In the state where the holding is released, the drive motor 110 operates again, and the holder 101, that is, the rocker arm shaft 7 moves forward in its axial direction. During this forward movement, the roller 106 rolls within the cam groove 108, so that the rotating shaft 105, that is, the holder 101 and the rocker arm shaft 7 move forward while reciprocatingly rotating around their axes.

As described above, the rocker arm shaft 7 moves forward while rotating around its axis, and is sequentially inserted into the cam holder 2a, the coil spring 3a, and the exhaust valve rocker arm 1a, which are positioned at the positioning part P. As shown by the chain line in FIG. 2a, the holder 101 has a stopper 1 provided on the base plate 8a.
Locker armshaft 7 until just before contacting 22
moves forward while rotating. At this time, the front end of the rocker arm shaft 7 is inserted into the cam holder 2d.

When the rocker arm shaft 7 advances to the state shown in FIG. 2a, the operation of the drive motor 110 is stopped and the first mounting jigs 10a to 10c are lowered. As a result, the exhaust valve rocker arm 1a and the coil spring 3a are supported by the rocker arm shaft 7 between the cam holders 2a and 2b, and the exhaust valve rocker arms 1b and 1c and the coil spring 3b are supported by the rocker arm shaft 7 between the cam holders 2b and 2c.
The exhaust valve rocker arms 1d, 1e and the coil spring 3c are supported on the rocker arm shaft 7 between the cam holders 2c, 2d. Moreover, the first mounting jigs 10a to 1 as described above
At the same time as the lowering of 0c, the third clampers 13a to 13
c also opens.

Next, the pressing cylinder 9 of the width shifting drive means 14
2 is extended, and the pressing rod 94 presses and drives the base plate 8a. As a result, the base plate 8a on which the cam holder 2a is mounted and the linear slider 26 move forward while compressing the coil spring 3a and the springs 37, 44, and accordingly, the linear slider 63 also springs 7.
It moves forward while compressing 0. At this time, as the first mounting jigs 10a to 10c descend, the base plate 8a
Since the spacing adjustment rod 79 between the base plates 8a and 8d has also been lowered, it is possible to reduce the spacing between the base plates 8a to 8d. Therefore, due to the increased spring force of each spring 3a, 37, 44, 70, the base plates 8b, 8c and the linear slider 26,
63 is sequentially moved, and as shown in FIG. 2b, the widths of the cam holders 2a to 2d are gradually brought closer together.

In this state, both ends of the shaft 5a inserted through the intake valve rocker arm 4a are connected to the cam holder 2a,
2b, the intake valve rocker arm 4b, 4
Both ends of the shaft 5b inserted through the cam holder 2
b, 2c, and is fitted to the intake valve rocker arm 4.
The shaft 5c inserted through d and 4e is the cam holder 2.
c and 2d, respectively, and the mounting jigs 9a and 9
b, 9c are cam holders 2a, 2b, 2, respectively
sandwiched between b, 2c, 2d, and 2e, respectively,
After that, each of the second mounting jigs 9a to 9c descends.

When the second mounting jigs 9a to 9c are lowered, the cam holders 2a to 2d and each intake valve rocker arm 4 are
Although a small gap is generated between the parts a to 4e, this gap is eliminated by the movement of the base plate 8a by the spring force of the spring 95 in the width shifting drive means 14, and the assembled state can be achieved. .

When the width adjustment to the cam holder 2d is completed, the drive motor 110 is activated again, and the locking arm shaft 7 moves forward while rotating, and the position shown in FIG.
As shown in , the operation of the drive motor 110 stops when the tip thereof moves until it fits into the cam holder 2e. At the same time, the mounting jig 10d is lowered, the third clamper 13f is also opened and activated, and then, in the same manner as described above, the width adjustment to the cam holder 2e is performed, and the second mounting jig 9d is lowered. .

Thereafter, the holder 101 is moved forward by the operation of the drive motor 110 until the tip of the rocker arm shaft 7 is inserted into the rocker arm 1h for the exhaust valve.
At this time, the holder 101 stops just before it comes into contact with a stopper 122 provided on the base plate 8a. In this state, the connecting cylinder 120 is contracted, the connecting pin 119 is removed from the insertion hole 118 and the notch 7a, and the locking arm shaft 7 is inserted into the holder 101.
The connection status of is released. Moreover, when this connection is released, the roller 106 is located in the straight part of the cam groove 108, and the locking arm shaft 7 has its notch 7a inserted into the locking hole 138 (see FIG. 5) provided in each cam holder 2a to 2f. (see), that is, the same posture as when it was first placed on the holding mechanism 123.

When the locking arm shaft 7 is disengaged from the holder 101, the drive motor 110 is activated, and the locking arm shaft 7 moves forward until its front end is inserted into the cam holder 2f, as shown in FIG. 2d. . At this time, the holder 101 is attached to the base plate 8a.
However, the running member 104 moves forward while compressing the spring 121, and the prismatic portion 1 at the rotation shaft 105 is prevented from moving forward.
The rocker arm shaft 7 is pressed by the tip of 05b.

The tip of the ROTSUKA armshaft 7 is the cam holder 2.
When the first mounting jig 10e is lowered and the third clamper 13e is opened, the pressing cylinder 92 of the width adjustment drive means 14 is extended, and the width adjustment to the cam holder 2f is performed. It is done. When this width adjustment is completed, the mounting jig 9e
is lowered, and the intake valve rocker arm 4h is firmly assembled between the cam holders 2e and 2f by the biasing force of the spring 95. Thereafter, the drive motor 110 is operated and the rocker arm shaft 7 is inserted to the final end as shown in FIG. 2e.

When the rocker arm shaft 7 is inserted to the final end in this way, the second clampers 12a to 12
e is operated to open, and each second clamper 12a
~12e returns to its original position by the spring force of the spring 70. Further, after opening the first clampers 11a to 11f, the rocker arm shaft 7 is fixed to each cam holder 2a to 2f by bolts carried in by a chuck conveyor (not shown), and the rocker arm shaft 7 and the like are taken out after the assembly is completed. Ru. Thereafter, the drive motor 110 operates in the opposite direction to the above-mentioned direction, and the holder 101 retreats and returns to its original position, and the pressing cylinder 92 contracts, causing the mounting jigs 9a to 9e and the first clampers 11a to 11e to return to their original positions. Return to position.

In the assembly process as described above, the rocker arm shaft 7 is inserted while rotating back and forth, so the coil springs 3a to 3e are inserted into the notch 7a and between the notch 7a and each of the exhaust valve rocker arms 1a to 1h. It is possible to smoothly insert the rocker arm shaft 7 without any trouble, and also to insert the rocker arm shaft 7 into each cam cam holder 2a to 2f and each exhaust valve rocker arm 1.
Scratches on the inner surfaces of a to 1h are avoided. In addition, it is possible to smoothly insert the coil springs 3a to 3e whose inner diameter is approximately equal to the outer diameter of the rocker arm shaft 7, and the rocker arms 1a to 3e for each exhaust valve can be smoothly inserted.
Even if the intake valve locker arms 1h are arranged with their axes slightly shifted, each intake valve locker arm 1a to 1h adjusts to the rotation of the locker arm shaft 7, allowing smooth insertion.

C. Effect of the invention As described above, according to the invention, in the positioning section, the first rocker arm, the coil spring, etc.
The mounting jig and the third clamper correctly position the second rocker arm and the like, the second mounting jig and the second clamper correctly position the cam holder, and the base plate and the first clamper correctly positioning the cam holder.
In this state, the rocker arm shaft is inserted by the insertion drive section, so that the rocker arm shaft can be smoothly inserted into the first rocker arm, the coil spring, and the cam holder. In addition, the base plates are maintained at an appropriate distance using spacing adjustment rods.
By lowering the first mounting jig, width adjustment becomes possible, and by adjusting the distance between the cam holders in which the rocker arm shafts are inserted by the width adjustment driving means, each part is smoothly brought closer to the width, and the second rocker arm is connected to the cam holder. In addition, when the first mounting jig is lowered, the first rocker arm supported by the rocker arm shaft is held in its correct posture by the posture holding plate, and when the second mounting jig is lowered, the first rocker arm supported by the rocker arm shaft is Since the second rocker arm supported by the cam holder is held in its correct position by the support plate, the position of each locker arm is held correctly when the locking arm shaft is completely inserted.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the positioning part, FIG. 2 is a diagram sequentially showing the assembly process, and FIG. 3 is an enlarged sectional view taken along the line - Figures 4 and 5 are cross-sectional views showing the cam holder on the base plate, and Figure 6 is the -
Figure 6A is a cross-sectional view taken along the - line in Figure 3, Figure 6A is a cross-sectional view corresponding to Figure 6 when the width is adjusted, Figure 7 is a cross-sectional view taken along the - line in Figure 3, and Figure 7A is the same as Figure 7 when the width is adjusted. The corresponding sectional views, FIG. 8 is a sectional view taken along the - line in FIG. 1, FIG. 9 is a sectional view taken along the - line in FIG. 8, and FIG. 10 is a sectional view of the mounting jig shown in FIGS. A perspective view, FIG. 11 is a sectional view taken along the - line in FIG. 3, FIG. 12 is a sectional view taken along the - line in FIG. 1, and FIG. 13 is a sectional view taken along the - line in FIG. 12.
FIG. 14 is a perspective view of the mounting jig shown in FIGS. 12 and 13, and FIG. 15 is a plan view of the insertion drive section.
Figure 6 is a sectional view taken along the - line in Figure 15, Figure 17 is an enlarged sectional view taken along the - line in Figure 15, Figure 18 is an enlarged sectional view taken along the - line in Figure 16, and Figure 19 is an enlarged - line sectional view in Figure 16. FIG. 1a to 1h... Exhaust valve rocker arm as a first rocker arm, 2a to 2f... Cam holder,
3a to 3e...Coil spring, 4a to 4h...Second
Locker arm for intake valve as Locker arm, 5
a~5e...shaft, 7...rotsuka armshaft,
8a-8f... base plate, 9a-9e... second mounting jig, 10a-10e... first mounting jig, 11a-
11f...first clamper, 12a-12e...second clamper, 13a-13e...third clamper,
14... Width shifting drive means, 37... Spring, 38...
...Moving plate, 55... Support plate, 79... Spacing adjustment rod, 86... Posture holding plate, 101... Holder,
102... Drive means, I... Insertion drive section, P...
Positioning part.

Claims (1)

[Scope of utility model registration request] Assemble parts such as a plurality of first rocker arms corresponding to one of the exhaust valve and intake valve, a plurality of cam holders, and a coil spring that surrounds the rocker arm shaft and is interposed between each first rocker arm to the rocker arm shaft. In addition, in a rocker arm shaft assembly device for assembling a second rocker arm, in which a shaft corresponding to the other of the exhaust valve and the intake valve and having both ends fitted to the cam holder is inserted between each cam holder, each cam holder is a plurality of base plates that are arranged in parallel at intervals and capable of moving toward and away from each other in order to position and place the base plates; and a spring interposed between each base plate to maintain the distance between the base plates; A plurality of movable plates are arranged between each base plate to enable movement in a direction parallel to the movement direction of each base plate, and parts such as the first rocker arm and coil spring are positioned and placed by enabling lifting and lowering operations. a plurality of first mounting jigs arranged between the respective base plates;
a spacing adjustment rod attached to the first mounting jig so as to come into contact with the base plate adjacent to both sides; and a plurality of second rods attached to the movable plate so as to be movable up and down in order to position and place parts such as a second rocker arm. Between the mounting jig, a support plate provided on the movable plate to maintain the posture of each second rocker arm supported by the cam holder via the shaft when the second mounting jig is lowered, and each base plate. A first rocker arm that is movable integrally with each base plate to clamp the cam holder and has a posture holding plate for maintaining the posture of the first rocker arm supported by the rocker arm shaft when the first mounting jig is lowered.
The second rocker arm, etc. can be clamped between the clamper and the second mounting jig, and the second rocker arm can follow the movement of the second rocker arm with its clamping force.
A base plate and a third clamper capable of clamping the first rocker arm, coil spring, etc. between the clamper and the first mounting jig and the cam holder into which the rocker arm shaft is inserted are arranged to reduce the distance between them. a positioning part including a width shifting drive means capable of driving each of the mounting jigs; a holder that removably holds one end of the rocker arm shaft; and a first rocker arm and a coil spring etc. that are positioned by the positioning part. A rocker armshaft assembling device comprising: an insertion drive section including a driving means connected to a holder for inserting the rocker armshaft into a component.