JPH06246551A - Shaft inserting device - Google Patents

Abstract

PURPOSE:To insert a shaft positively into a bearing hole by holding the attitude of a member with the bearing hole in the neutral position, to the required inclined attitude so as to make the respective axes of the shaft and bearing hole coincide with each other on the way of the shaft being inserted into the bearing hole. CONSTITUTION:At the time of inserting a locker arm shaft PS into the bearing hole EH of a cam holder EF1, the holding base 10d of the cam holder EF1 is oscillatingly supported by a rotating shaft 10h offset downward. The holding base 10d is then brought into butt-contact with a stopper 10j by a spring 10i and turned backward in the insert direction so as to incline the axis of the bearing hole EH onto the offset side of the rotating shaft 10h. At the insertion starting time, the axis of the bearing hole EH does not thereby coincide with the axis of the locker arm shaft PS so as to impede smooth insertion. However, both axes coincide on the way of the attitude of the cam holer EF1 being raised against the spring 10i, so that the locker arm shaft PS can be positively inserted into the bearing hole EH.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft inserting device for inserting a rocker arm shaft into a holder member, which is used, for example, in automatically assembling engine parts.

[0002]

2. Description of the Related Art When automatically assembling engine parts,
It is necessary to insert the rocker arm into the bearing hole provided in the cam holder that is the holder member. In such a case, for example, according to Japanese Patent Application No. 4-129000, a cam holder with a bearing hole into which a rocker arm shaft is inserted is opened.
One in which a rocker arm shaft is inserted into the bearing hole by setting it on a holding base having horizontal compliance by making it slidable on a horizontal guide perpendicular to the axis of the bearing hole. Are known.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
Due to the gap formed between the horizontal guide provided to provide horizontal compliance and the holding base, the holding base has a compliance that swings about a horizontal axis parallel to the horizontal guide. When inserting the rocker arm shaft in this state, if the tip of the rocker arm shaft comes into contact with the opening of the bearing hole, there will be some misalignment between the axis of the bearing hole and the axis of the rocker arm shaft and friction between the bearing hole and the rocker arm shaft. As a result, the rocker arm shaft pushes the cam holder, and the cam holder tilts to the side opposite to the rocker arm shaft. Then, the axis line of the bearing hole is inclined with respect to the axis line of the rocker arm shaft, the tip of the rocker arm shaft is caught in the bearing hole, and the cam holder is further inclined, so that the rocker arm shaft cannot be inserted any further.

It is possible to increase the holding rigidity between the horizontal guide and the holding base so that the horizontal guide does not have compliance about an axis parallel to the horizontal guide. In this case, however, the holding base has a cam holder. If the axis of the bearing hole is misaligned with the axis of the rocker arm shaft when setting
On the contrary, there may be a case where the rocker arm shaft cannot be inserted due to lack of compliance.

Therefore, in view of the above problems, the present invention is a shaft insertion device capable of reliably inserting a rocker arm shaft into a bearing hole while ensuring compliance around an axis perpendicular to the axis of the bearing hole. The purpose is to provide.

[0006]

In order to achieve the above object, the present invention provides a member having a bearing hole around an axis orthogonal to a plane including the axis of the bearing hole at a position offset from the axis. In a shaft insertion device that is held by a holding table having compliance and inserts the shaft along the axis of the bearing hole, the posture of the member at the neutral position is set so that the axis of the bearing hole is relative to the axis of the shaft. It is characterized in that a means for holding in a tilted posture so as to be inclined at a predetermined angle toward the offset side of the orthogonal axis lines toward the rear in the insertion direction is provided.

[0007]

The operation of the present invention will be described with reference to FIG. 15. When the shaft RS is inserted into the bearing hole EH of the member EF on the holding stand d having the compliance about the axis h perpendicular to the plane of the drawing, the shaft RS is inserted. Bearing hole EH for axis α of RS
Since the axis β of is inclined by a predetermined angle θ,
At the start of insertion, the shaft RS comes into contact with the upper edge portion of the bearing hole EH. Then, the shaft RS has a bearing hole E.
When the upper edge of H is pushed to raise the member EF and both axes α and β coincide with each other, the shaft RS is smoothly inserted into the bearing hole EH. The shafts RS are surely inserted into the bearing holes EH because the two axes α and β always coincide with each other while the member EF is being raised.

[0008]

EXAMPLE An example in which the present invention is applied to a rocker arm assembling device in a so-called 4-cylinder 1-cam 4-valve engine will be described. In the case of the present embodiment, as shown in FIG. 14, the end holders EF1 and EF2 at both ends and the first cam holder CF1 and the second cam holder CF arranged between them.
2. Rocker arm shafts RS on the exhaust side and the intake side, which are supported in parallel to each other across the third and third cam holders CF3
In addition, the intake side rocker arm IR and the wave washer SP that holds the axial position of the rocker arm IR as well.
1, the rocker arm ER on the exhaust side and the rocker arm E
The spring SP2 that holds the axial position of R is assembled so as to support the through shaft. The rocker arm shaft RS is inserted into and supported by a bearing hole CH formed of a pair of through holes provided in each of the first to third cam holders CF1 to CF3, and each facing surface of each end holder EF1 and EF2. The bearings are supported by bearing holes EH, which are provided in pairs, each of which does not penetrate, and the position in the longitudinal direction is regulated.

Referring to FIG. 1, reference numeral 1 denotes an assembling apparatus for automatically assembling the rocker arms IR and ER in the state shown in FIG.
R / IR and spring SP2 / wave washer SP
1 is supported by each dummy shaft DS, which is slightly thinner than the rocker arm shaft RS and has a predetermined length longer than the distance between the facing side surfaces of each of the holders EF2, CF1 to CF3, EF1, and the intake side and the exhaust side for each cylinder. The rocker arm units IY and EY are assembled at a different place outside the drawing, and the rocker arm units IY and EY are transported to the assembling apparatus 1 by the transport loader L. Then, in the assembling apparatus 1, the first to first installed in advance at a pitch wider than the interval at the time of completion of the assembling.
After the above units are set between the third cam holders CF1 to CF3 and on both sides in the juxtaposed direction, the gap between the cam holders CF1 to CF3 is narrowed, and the shaft end of the dummy shaft DS is once inserted into the bearing hole CH. Standby on the extension of the first to third cam holders CF1 to CF3 in the parallel installation direction 1
The pair of rocker arm shafts RS are inserted into the respective bearing holes CH to replace the dummy shafts DS with each other, and thereafter both shaft ends of each rocker arm shaft RS are attached to the end holder EF1.
・ Complete the assembly by inserting it into each bearing hole EH of EF2.

The transfer loader L is provided with an arm LR that is long in the front-rear direction and reciprocates along a guide frame LL that is installed over the assembling apparatus 1 in the lateral direction. , As shown in FIG. 2 and FIG.
The fourth loader units L1 to L4 were supported slidably in the front-rear direction. The loader units L1 to L4 are connected to each other via a cylinder LS, and the loader unit L1 located at the rear end in the juxtaposed direction is connected to the main body of the loader L via a cylinder LS.

The loader units L1 to L4 include rocker arm units EY and IY for the exhaust side and the intake side of each cylinder.
A chuck LC for gripping is provided by a cylinder LE so as to be able to move up and down, and by an air motor EM so as to be rotatable by 90 degrees about a vertical axis. The chuck LC includes two pairs of clamp pieces LA for holding the rocker arm units EY and IY on the exhaust side and the intake side on each dummy shaft DS.
Are provided in such a manner that they are spaced apart from each other in the axial direction of these dummy shafts DS, and the outer two of the two pairs of clamp pieces LA of each set are biased inward by the spring ASa, and the inner two are both The dummy shafts DS are gripped by the biasing force of the springs ASa and ASb, which are biased outward by the spring ASb which is contracted between them. The chuck LC was biased upward by a spring (not shown) to provide compliance downward.

In this embodiment, the loader unit L1
・ Each rocker arm unit IY ・ EY in the state shown in L2
After gripping, the chucks LC are swung by the air motor EM to move the loader units L1 to L4 to L3 in the drawing.
In the state shown in L4, the dummy shafts DS held by the chucks LC are aligned with the common longitudinal axes in the front-rear direction on the intake side and the exhaust side, respectively. Move to above.

The assembling apparatus 1 is provided with an assembly table 1a located in the front thereof, and a pair of rocker arm shafts RS is held behind the assembly table 1a on a shaft insertion base 1b which is slidable in the front-rear direction. .

As shown in FIGS. 4 and 5, the assembly table 1a is provided with a fixed base 10 for fixing the end holder EF1 at the rear end, and the fixed base 10 is arranged in the order of first to third from the fixed base 10 toward the front. First to third sliding bases 11-1 for setting the cam holders CF1 to CF3 and the end holder EF2, respectively
11-3 and the pressure table 13 are mounted so as to be slidable in the front-rear direction. The sliding bases 11-1 to 11-3 are sequentially connected in series to the fixed base 10 via the cylinder 12, and the pressure base 13 is directly connected to the main body of the assembly table 1a and has a larger size. They are connected via a cylinder 14.

Each of the sliding bases 11-1 to 11-3 has the same structure. When these structures are shown by taking the sliding base 11-1 as an example, as shown in FIG. 11a is laid, and the first substrate 11b is placed on the rail 11a. The first substrate 11b has a second substrate 11c having a downward compliance, and a third substrate 11d having a compliance by a spring pin 11y, which is rotatably held on the first substrate 11b by a bearing 11g about a vertical axis CE. Is provided. The first board 11b is elastically held in the lateral position by a pair of spring pins 11x facing each other in the lateral direction which is the sliding direction of the first board 11b, and is stopped by a stopper 11z arranged in parallel with the spring pin 11x. The amount of lateral compliance is regulated.

Further, the fixed base 10 and the pressurization base 13 are symmetrical in structure to each other, and as shown in each of FIGS. 6, 8, 9 and 11, the rails 10a and 13a longitudinally extending in the lateral direction. And a first substrate 10b / 13 slid on the rails 10a / 13a by cylinders 10e / 13e.
b is provided, on the first substrate 10b, 13b, there are provided rotating brackets 10c, 13c which are held by bearings 10g, 13g and are rotatable about the vertical axis CE, and further, the rotating brackets 10c, 13c. The second bases 10d and 13d are swingably connected at the upper end of 13c via rotary shafts 10h and 13h that are long in the horizontal direction. The rotating brackets 10c and 13c are a pair of spring pins 10.
It is held at a neutral position in the rotational direction by y · 13y, and compliance is provided in both rotational directions. On the other hand, the second bases 10d and 13d are biased by the pair of springs 10i and 13i in the directions in which the end holders EF1 and EF2 swing toward the first to third cam holders CF1 to CF3, respectively. The axis of the bearing hole EH of the EF2 is in contact with the stoppers 10j and 13j in a state in which the axis of the bearing hole EH is inclined by a predetermined angle in the direction of decreasing toward the first to third cam holders CF1 to CF3. The stopper 10
j and 13j are attached to the rotation brackets 10c and 13c, and the stoppers 10k and 13k for restricting the second bases 10d and 13d from swinging in the direction opposite to the urging direction of the springs 10i and 13i. The first base 1 with a predetermined space between the second base 10d and the second base 13d.
It is installed at 0b and 13b. As a result, the second base 1
0d and 13d are provided with a compliance that swings around the axes of the rotary shafts 10h and 13h, and the amount of this compliance is regulated by both stoppers 10j and 10k and 13j and 13k. Further, when the fixed base 10 is shown as an example, FIG.
The bracket 1 connected to the first substrate 10b as shown in FIG.
0f is clamped by a pair of spring pins 10x facing the cylinder 10e in the sliding direction of the first substrate 10b,
The compliance is provided from the sandwiched position in the sliding direction, that is, the lateral direction. In addition, in order to regulate the movable range by the lateral compliance, a pair of stoppers 1 are provided with a predetermined gap with respect to the bracket 10f.
0z is set. Also, the first substrate 1 of the fixed base 10
0b and the first substrate 13b of the pressure table 13 respectively have pressure pieces 1
9 are provided so as to face each other, and laterally-long cutout windows 19a that open to the second substrates 10d and 13d are provided on the surfaces of the pressing pieces 19 that face each other. Then, the second substrate 10d
・ End holders EF1 and EF2 are clamper 1 on 13d
00, and the cam holders CF1 to CF3 are respectively attached to the third board 10d of the intermediate three machines, and the bearing holes CH and EH are provided.
Both are held by the clamper 100 so as to be located on the common axis.

Next, a work procedure in the assembling apparatus 1 will be described with reference to FIG. First, the pressure pieces 1 are attached to the chucks LC holding the rocker arm units EY and IY.
9 and each of the cam holders CF1 to CF3 are lowered, and the common axis of the dummy shaft DS and the bearing holes CH
And the common axis line of the same are matched (FIG. 13A). Next, the cylinders LS of the loader L and the cylinders 12 and 14 of the assembly table 1a are actuated to shift the loader units L1 to L4 rearward in the horizontal direction. First, the shaft end of the dummy shaft DS is set in the bearing hole CH. To insert. At this time, since the dummy shafts DS are simultaneously inserted into the bearing holes CH of the cam holders CF1 to CF3 from both sides in the front-rear direction, the pressing forces acting on the both sides are balanced, and the cam holder CF1.
None of CF3 is inclined in the front-back direction.
Further, even when the axis line of each bearing hole CH and the axis line of the dummy shaft DS do not coincide with each other at the time of this insertion, if the shaft end of the dummy shaft DS is inserted into the bearing hole CH, the position of the cam holder 16 will be based on each compliance. The shaft end of the dummy shaft DS which is straightened and is gripped in a predetermined relative positional relationship with the dummy shaft DS via the chuck LC is smoothly inserted into the bearing hole CH (FIG. 13B). If at least both shaft ends of the dummy shaft DS are tapered, the tapered portions serve as guides and the dummy shaft DS can be reliably inserted into the bearing hole even if there is some error in the positioning by the loader L.

Next, the inner two loader units L2
The chuck LC of L3 was separated upward, and the separated 2
After the chuck claw LA of the chuck LC of the machine has been removed, the gap between the cam holders 16 is further narrowed, and then the cylinder 21 shown in FIG. 12 is operated to swing the rocker arm shaft RS around the axis while operating the cylinder 22. To move the shaft insertion table 1b to the assembly table 1a side,
The rocker arm shaft RS is inserted into each bearing hole CH and each dummy shaft DS is pushed out to the shooter 18 (FIG. 13 (c)). Next, the first of the fixed base 10 and the pressure base 13
Notch 19a of pressure piece 19 by retracting substrates 10b and 13b
The shaft end of the rocker arm shaft RS is disengaged from the inside and the end holders EF1 and EF2 are made to coincide with the center line CL in place of the pressing piece 19 (FIG. 13 (d)). Then, the cam holders CF1 to CF3 and the end holder EF2 are further moved to the end holder EF1 side so that both shaft ends of each rocker arm shaft RS are respectively inserted into the bearing holes EH, and subsequently, the loader units L1 of the two outer machines. L4 chuck L
After raising C, the gap corresponding to the thickness of the chuck claws LA of the two raised machines is closed, whereby the assembly of the rocker arm is completed.

Also, as shown in the above-mentioned column of action, the shaft end of the rocker arm shaft RS is attached to each end holder EF1.
・ When inserting into the bearing hole EH of EF2, the bearing hole EH
The axis line of the rocker arm shaft R is inclined by a predetermined angle with respect to the axis line of the rocker arm shaft RS as described above.
The shaft end of S comes into contact with the upper edge of the bearing hole EH and is pushed by the shaft end of the rocker arm shaft RS so that each end holder EF1.
Both EF2 swing outwardly in the direction of juxtaposition around the rotation shafts 10h and 13h against the biasing force of the springs 10i and 13i. Then, the axis line of the bearing hole EH coincides with the axis line of the rocker arm shaft RS during the swing, and the rocker arm shaft RS is not caught in the bearing hole EH, so that the rocker arm shaft RS is smoothly inserted into the bearing hole EH thereafter. Is inserted. At this time, since the rocker arm shaft RS is held by the first to third sliding bases 11-1 to 11-3 having vertical compliance, the vertical compliance is fixed to the fixed base 10 and the pressurization base 13. There is no problem even if is not provided.

[0020]

As is apparent from the above description, according to the present invention, the shaft can be surely inserted into the bearing hole of the member held on the holding table. For example, the rocker arm shaft is provided in the holder member. If it is applied when it is inserted into the bearing hole, the engine parts can be automatically assembled.

[Brief description of drawings]

FIG. 1 is a layout diagram showing an arrangement of an assembling device and a transfer loader.

[Fig. 2] Front view of the loader

FIG. 3 is a side sectional view of the loader.

FIG. 4 is a plan view of an assembly table portion of the assembling apparatus.

FIG. 5 is a front view of an assembly table portion of the assembly device.

[Fig.6] VI-VI sectional view

FIG. 7 VII-VII sectional view

FIG. 8 VIII-VIII sectional view

FIG. 9 IX-IX sectional view

[Figure 10] XX cross section

FIG. 11: XI-XI cross section

FIG. 12 is a plan view of a shaft insertion table portion of the assembling device.

FIG. 13 is a diagram showing details of a rocker arm assembling process.

FIG. 14 is a diagram showing a completed assembly state.

FIG. 15 is a configuration diagram illustrating an operation.

[Explanation of Codes] 1 assembly device 1a assembly table 1b shaft insertion table 10 fixed table 11-1 first sliding table 11-2 second sliding table 11-3 third sliding table 13 pressure table 10h 13h Rotating shaft 10i ・ 13i Spring 10j ・ 13j Stopper 10k ・ 13k Stopper L Loader RS Rocker arm shaft CH Shaft bearing hole EH Shaft bearing hole IR / ER Rocker arm CF1, CF2, CF3 Cam holder EF1, EF2 End holder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Sachiaki Itate, 1-10-1 Shin-Sayama, Sayama-shi, Saitama Prefecture Honda Engineering Co., Ltd.

Claims (1)

[Claims] 1. A member having a bearing hole is held by a holding base having compliance about an axis orthogonal to a plane including the axis of the bearing hole at a position offset from the axis, In a shaft insertion device that inserts a shaft along an axis, a posture of the member at a neutral position is determined such that the axis of the bearing hole is on the offset side of the axis orthogonal to the axis of the shaft and toward the rear in the insertion direction of the shaft. A shaft insertion device, characterized in that it is provided with a means for holding it in an inclined posture such that the shaft is inclined.