JPH01216732A - Device for assembling spring and lower seat - Google Patents

Abstract

PURPOSE:To prevent inferior assembling by moving a spring and a lower seat which are externally fitted and supported by the projecting action of a projecting/retracting member for the cylinder member, to the lower half portion of the cylinder member by means of a pressing member through the retracting action thereof. CONSTITUTION:At the time of assembling a valve spring B for upwardly energizingly supporting a valve D and a lower seat A for supporting the lower end thereof into a cylinder head W, the spring B and lower seat A are fitted on and supported by the upper half portion of a cylinder member 62 through the projecting action of a projecting/retracting member (notch balls) 66 for the cylinder member 62. Then, by retracting the notch balls 66 through the contraction of a fluid-pressure cylinder 65 while lowering a pressing member 67 through the operation of a pressing cylinder 68, the spring B and lower seat A are moved downward to be assembled into the cylinder head W. Thereby, nonconformity such as inferior assembling and damage to an assembling device or the cylinder head can be eliminated as tar as possible.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a spring for upwardly biasing and supporting a valve mounted on a cylinder head of a vehicle engine such as an automobile, and a spring for supporting a lower end of the spring. The present invention relates to an improvement in a device for assembling a lower seat to the cylinder head, and particularly relates to measures for increasing efficiency in assembling.

(Prior Art) Conventionally, when assembling a spring, a lower seat, etc. to a cylinder head of an engine for a vehicle such as an automobile, for example, as disclosed in Japanese Utility Model Application Publication No. 11537/1983,
When assembling the cylinder head, such as assembling the lower seat independently on the cylinder head, during the process of conveying it to the assembly line, each dedicated assembly station installed on the assembly line is assembled individually by equipment. This is generally how it is done.

(Problem to be Solved by the Invention) However, when assembling the lower seat to the cylinder head, as in the example of the above publication, the lower seat is installed at the back of the cylinder head. During assembly, there is a risk that a part of the assembly may come into contact with the side wall of the cylinder head while moving it into position.In this case, the assembly may be defective or the assembly may cause problems such as damage to the equipment and the side wall of the cylinder head. will occur.

Furthermore, as typified by the example in this publication, one assembly is performed at a station and only one type of part is assembled, so all assemblies require a long time to complete the assembly of parts. However, for this reason, there has recently been a demand for shorter assembly times. Further, assembly requires stations (equipment for assembly) depending on the type of parts, and the assembly line as a whole becomes complicated.

The present invention has been made in view of the above, and the object thereof is to provide a spring for upwardly biasing and supporting a valve mounted on a cylinder head of an engine;
By taking appropriate means to simultaneously assemble the lower seat for supporting the lower end of the spring, the lower seat can be assembled by a short distance corresponding to the length of the spring. Therefore, the purpose of the assembly is to eliminate as much as possible problems such as defective assembly or damage to the assembly and cylinder head side wall due to a part of the device coming into contact with the cylinder head side wall.

Furthermore, the two types of assembly involve assembling parts at the same time, and one type of assembly is intended to save time in assembling the parts, thereby reducing the time required to assemble the entire assembly. On the other hand, the purpose of assembly is to omit a station (assembly is a device) and to simplify the assembly line as a whole.

(Means for Solving the Problems) In order to achieve the above object, the solution means of the present invention includes a spring for upwardly biasing and supporting a valve mounted on a cylinder head of an engine, and a spring for supporting a valve mounted on a cylinder head of an engine, and The object is a device for assembling a supporting lower seat to the cylinder head, and in this case, the spring is placed on the upper side and the lower seat is placed on the lower side in the direction of the center line of the hole of the cylindrical member into which they are fitted externally. A protruding and retractable member is provided in the middle so that it can protrude and retract in the radial direction of the cylindrical member. The protruding and retracting member allows the upper half of the cylindrical member to support the spring and the lower seat fitted externally to the cylindrical member in the protruding state, while the spring in the upper half of the cylindrical member and the cylindrical member of the lower seat in the retracted state. Make it possible to move to the lower half.

Further, a pressing member is externally fitted to the upper end band of the cylindrical member so as to be movable downwardly, and the pressing member moves the tip of the cylindrical member downwardly in a retracted state while pressing the tip of the cylindrical member against the cylinder head. The spring and lower seat externally fitted to the upper half of the cylindrical member are pressed downward from above and assembled into the cylinder head.

(Function) With the above configuration, in the present invention, the spring and lower seat, which are externally fitted to the cylindrical member and supported by the protruding action of the retractable member in the upper half thereof, press the tip of the cylindrical member against the cylinder head. By moving the pressing member downward in this state and in the retracted state of the protruding/retracting member, it is pressed downward from above and assembled into the cylinder head.

From this, the assembly of the lower seat that is shorter by a distance corresponding to the length of the spring is performed by movement,
As a result, compared to the case where the assembly has a long operation, there is a possibility that a part of the assembly will come into contact with the side wall of the cylinder head, resulting in defective assembly or damage to the assembly and the side wall of the cylinder head. It will be resolved in .

Furthermore, in the two types of assembly, work is done simultaneously when assembling the parts, so in one type of assembly, time is omitted when assembling the parts, and overall assembly time is reduced. This will be planned. Furthermore, one of the assembly stations (assembling equipment) is omitted, and the assembly line as a whole can be simplified.

(Example) Embodiments of the present invention will be described below based on the drawings.

Figure 4 shows the assembly process for assembling various parts to the cylinder head of an engine for a vehicle such as an automobile, and the assembly process for the spring and lower seat assembly according to the embodiment of the present invention is also shown in this figure. This is what is included in it.

First, before entering into a description of the apparatus for assembling this embodiment, an outline of the entire assembly procedure will be explained.

First, the cylinder head is carried into the vehicle type detection station S1, where it is detected which type of vehicle the cylinder head is rated for. Next, the cylinder head whose vehicle type has been detected is transported to the valve seal assembly station S2, where the valve seal is press-fitted. After that, the cylinder head is carried to inversion station S3 and inverted 180' into an upside-down position, and then the inlet valve and exhaust valve are assembled at station S4 for inlet valve assembly and station S5 for exhaust valve assembly. Attach each.

After that, the cylinder head with both valves inserted and assembled is carried to the reversing station S6 and reversed 180" to return to its normal position. After that, the spring and lower seat are assembled at station S7. Next, the cylinder head with the spring and lower seat assembled is carried to station S8 where the inlet side retainer (upper seat) and collet are assembled, and after the retainer and collet are assembled, The side retainer and collet are assembled at station S9, where the retainer and collet are assembled.
At step 9, it is inspected whether all the collets on the inlet side and the exhaust side are properly assembled, and the assembly of various parts to the cylinder head is completed.

The apparatus for assembling the spring and lower seat according to the embodiment of the present invention is installed at station S7 for assembling the spring and lower seat during the assembly process. For this assembly, the station S7 is equipped with two rotary tables 3.3 on a base 1, which can be rotated four times in forward and opposite directions around an axis 2, as shown in FIG.
On the outer periphery of the upper surface of the multi-rotary table 3, a plurality (eight) of cylindrical receivers are arranged at predetermined intervals as members 4, 4. ...is placed.

Moreover, between the re-rotation tables 3, 3, a support stand 5 which can rotate 180@ in a horizontal plane is arranged, and a plurality of lower sheets A, A, .
... (as shown in FIGS. 1, 6, 7, and 8) are sequentially moved to the delivery position at the front end of the table 5.

Furthermore, above the support 5, as shown in FIG. 6, horizontally extending piston rods 8a are attached to support plates 7 at the upper ends of columns 6.6 so as to face each other.
First and second hydraulic cylinders 8 with +9 a
, 9, and a third fluid pressure cylinder 10 having a collet chuck 12 is attached to the tips of the piston rods ga, 9a of both fluid pressure cylinders 8, 9 by means of a support plate 11. The third fluid pressure cylinder 1o is configured to lower the collet chuck 12 as shown by the imaginary line so that its tip is inserted into the lower seam hole A on the receiver 5 by its extension operation. and
When the tip of the collet chuck 12 is inserted, its expanding operation holds the lower seat A from inside. Further, as shown by the imaginary line, the first fluid pressure cylinder 8 receives the lower sheet A held by the collet chuck 12 by its extension operation, and receives the rotary table 3 which rotates counterclockwise to the left from the base 5. The famous actor moves the rotary table 3 upward to pass the receiver to the member 4, and at the same time, the lower sheet A held by the collet chuck 12 is moved from the base 5 to the rotary table 3, which rotates clockwise to the right. Each of the receivers is moved above the rotary table 3 in order to pass the receiver to the member 4. Further, the second fluid pressure cylinder 9 is adapted to return the collet chuck 12, which has been moved to the left, to the state shown by the solid line by an extension operation.

Further, above each of the rotary tables 3, a lower seat detection fluid pressure cylinder 13 having a downwardly extending piston rod 13a having a short cylindrical detection insertion tool 14 fixed to the tip thereof is connected to the first to third fluid pressure cylinders. Support members 15 erected on the rotary table 3 side of each support column 6 that supports 8, 9, and 10
A fluid pressure cylinder 1 disposed at the upper end for detecting the lower seat.
Each receiver on the rotary table 3 is moved by the member 4 depending on the stroke amount of the detection insert 14 that is lowered by the extension operation of the member 4.
It is determined whether or not the lower sheet A is being supplied.

Furthermore, on the downstream side of the lower seat detection fluid pressure cylinder 13 in the rotational direction of the rotary table 3, as shown in enlarged detail in FIG. A spring supply device 16 supplies a valve spring B as a spring having a different pitch in a predetermined range on both end sides in the linear direction.
It is disposed at the upper end of a support column 17 erected in an upright position with an upper bracket 18 and a lower bracket 19 interposed therebetween. The spring supply device 16 consists of four spring supply devices (two springs in the figure) extending in the vertical direction supported by a cylindrical upper block 20 fixed to the tip of the upper bracket 18 and a cylindrical lower block 21 fixed to the tip of the lower bracket 19. Rod 2 (only books appear)
2,22. ..., and the rod 22.22.
Multiple valve springs B in a space consisting of...
, B, . . . are supplied from above with the retainer side facing upward. In other words, each valve spring B is placed in an upright position with its narrow pitch end on the lower seat side facing down and its wide pitch end on the retainer support side facing up, in order to prevent so-called surging (waving phenomenon) that adversely affects engine performance. It is designed to be supplied from above. Further, below the lower bracket 19, a piston rod 23a extending horizontally toward each of the rods 22 is provided.
A first clamp cylinder 23 having a
At the tip of the piston rod 23a of the clamp cylinder 23, rods 22, 22. . . . a pair of gripping claws 24 located on the outside of each valve spring B supplied to the space between them.
24 is attached, and when the first clamp cylinder 23 is contracted, the gripping claws 24, 24 are brought closer to each other to grip the valve spring B and prevent the valve spring B from moving downward. On the other hand, the first
By the extension operation of the clamp cylinder 23, both gripping claws 24.
24 away from each other to separate the valve springs B and allow the valve springs B to move downward.

Further, another second clamp cylinder 25 is disposed below the first clamp cylinder 23, and the second clamp cylinder 25 is connected to a piston rod extending upward from the vertically movable cylinder 26 disposed below the support column 17. It is connected to the tip of 26a, and is configured to be movable up and down by the expansion and contraction operation of the fluid pressure cylinder 26. On the other hand, the vertical movement cylinder 26
Similarly to the first clamp cylinder 23, the piston rod of the second clamp cylinder 25 connected to the
Rods 22, 22. A pair of gripping claws 27, 27 are attached to the outside of each spring B supplied to the space between them, and the contraction of the second clamp cylinder 25 brings the two gripping claws 27, 27 closer to each other. grip the valve spring B, and move the valve spring B downward by the contraction operation of the vertically movable cylinder 26, so that each receiver on the rotary table 3 is moved onto the lower seat A supplied to the member 4, With the valve spring B moved onto the lower seat A, both gripping claws 27, 27 are extended by the second clamp cylinder 25.
are moved away from each other to release the spring B, and the valve spring B is passed to the rotary table 3 side.

Further, a swinging cylinder 28 having a piston rod 28a extending downward is disposed in the upper block 20 of the upper bracket 18 via a bracket 29, and the tip of the piston rod 28a of the swinging cylinder 28 is connected to the lower bracket 18. An L-shaped spring receiver rotatably supported by the lower block 21 of 19 around a shaft 30 is connected to the plate 31. The spring bearing plate 31 is moved around the shaft 31 as shown by the solid line by the expansion operation of the swing cylinder 28.
It is rotated by a predetermined angle in the clockwise direction around zero, and its lower end receiver receives the valve spring B at the portion 31a, while the shaft 30 is rotated as shown by the imaginary line by the contraction operation of the swing cylinder 28. The vertical movement cylinder 26 is rotated counterclockwise by a predetermined angle.
It is designed not to interfere with the valve spring B, which is moved downward by the contraction operation of the valve spring B. In addition, in the spring receiver, a spring detection bar 32 in the shape of a "he" is attached to the shaft 3 through a bracket 33 on the lower side of the plate 31.
The bar 32 is rotatably attached to the plate 31, and the bar 32 is always urged to rotate clockwise by a coil spring 36, which is attached to the rear end of the bar 32 and a pin 35 protruding from the lower end of the plate 31. The tip of the rod 22, 22
．． ...and when there is a valve spring B, it is pressed by the valve spring B and rotates by a predetermined angle counterclockwise against the biasing force of the coil spring 36, as shown by the solid line. It is made to move. Further, the bracket 33 supporting the bar 32 is provided with a proximity sensor 37, which detects when the rear end of the bar 32 rotated by the valve spring B approaches.

Further, on the downstream side in the rotational direction of each rotary table 3,
As shown in FIGS. 5 and 8, a coil spring orientation determining device 38 is arranged to determine the orientation of each valve spring B in the direction of the coil center line (vertical direction). The coil spring orientation determining device 38 includes a light emitting sensor, etc., which irradiates a light beam C in a slit shape onto a predetermined range of one (upper end) of the valve spring B supported by the member 4. The detection device 40 includes a light projecting means and a light receiving means such as a light receiving sensor that receives the light beam C emitted by the light projecting means and reflected by the reflecting plate 39. Device 4
0 is connected to determination means 41 consisting of a CPU or the like. Further, in the determination means 41, the amount of light received when the light beam C irradiated by the light projecting means passes through a predetermined range on the upper end side of each valve spring B in the direction of the coil center line is preset as a reference value. remembered.

Then, the determination means 41 compares the received amount of the light beam C directed toward each valve spring B from the light projecting means of the detection device 40 and received by the light receiving means with the reference value, and each valve spring The direction of the coil center line is determined to determine whether B is placed in a normal standing posture.

Also, on the side, there is a valve spring B in the opposite position.
A posture correction robot 42 is arranged to correct the posture of the person to a normal standing posture. The posture correction robot 42
As shown in enlarged detail in FIG. 9, this includes an elevating cylinder 45 disposed at the upper end of a support column 43 via a support plate 44, and a piston rod 45a extending downwardly of the elevating cylinder 45 has a A rotating cylinder 47 is arranged via a mounting plate 46. Further, the horizontally extending piston rod 47a of the rotary cylinder 47 has a tip 1;
An opening/closing cylinder 49 having claws 48, 48 (only one is shown in the figure) for clamping each valve spring B in the above-mentioned reverse orientation is connected to the opening/closing cylinder 49 (claws 48, 48).
．． 48) is 180 by the operation of the rotary cylinder 47.
” is configured so that it can be flipped vertically.
Each spring B is a coil spring orientation determining device 3.
If the result of the determination in step 8 is that the valve spring B is in the reverse orientation, the claws 48 and 48 are moved downward by the lowering operation of the lifting cylinder 45, and then the opening/closing cylinder 49 of the valve spring B in the reverse orientation is moved. Clamps when closed. Next, the valve spring B is attached to the lifting cylinder 45.
After being lifted upward by the rising operation of the rotating cylinder 4
It is reversed by 180@ by the rotation operation of step 7. Thereafter, the valve spring B is moved downward by the lowering operation of the lifting cylinder 45, and its posture is corrected to the normal state.
The clamp state is released by opening the opening/closing cylinder 49. Thereafter, both claws 48, 48 after the clamp has been released are returned to their original upper positions by the lifting operation of the elevating cylinder 45, in preparation for the next posture correction. The rotating cylinder 47 and the opening/closing cylinder 49 are connected to two guide rods 50 extending upward from both ends of the mounting plate 46.
50 is fitted into each of the cylindrical members 51 and 51 of the support plate 44, and is stably supported.

Furthermore, on the downstream side, as a feature of the present invention, devices 52 and 52 are arranged for assembling a pair of springs and a lower seat. A pair of valve springs B and lower seat A that are stacked one above the other are taken out, and the taken out valve springs B and lower seat A are assembled to the cylinder head.

Also, on the downstream side thereof, both the rotary tables 3, 3 are provided.
In between, fluid pressure cylinders 53 and 53 each having a pair of vertically extending piston rods are disposed with the tips of each piston rod facing above each rotary table 3 and supported by the upper end of the support member 54. Fluid pressure cylinder 5
In each of the above-mentioned assemblies, a device 52 determines whether or not the valve spring B and lower seat A have been taken out, based on the stroke amount of the piston rod due to the extension operation of step 3.

As shown in enlarged detail in FIGS. 1 to 3, the device 52.52 for assembling both springs and the lower seat is a fixed support plate member 56 attached to the tip of the arm 55a of the robot 55, and A movable support plate member 57 is rotatably supported by a support plate member 56. A fluid pressure cylinder 59 is disposed on the fixed support plate member 56 and has a piston rod 59a that extends toward the movable support plate member 57 and has a rack 58 fixed to its tip. , a pinion 60 that meshes with the rack 58 is disposed, and the movable support plate member 57 side is rotated clockwise by the expansion operation of the fluid pressure cylinder 59, and the assembly of the movable support plate member 57 is performed by the device 52. The fixed support plate member 56 side is assembled by moving it closer to the device 52, and both assemblies are performed by the devices 52 and 52.
The assembly on the inlet valve side corresponds to the pitch, while the movable support plate member 57 is rotated counterclockwise by the contraction operation of the fluid pressure cylinder 59, and the movable support plate member 5
When assembling on the 7 side, the device 52 is moved away from the device 52 when assembling on the fixed support plate member 56 side, and when assembling both devices 52 and 52 on the exhaust valve side, it is made to correspond to the pitch. being done. Note that 61 is a guide roller disposed on the fixed support plate member 56 so as to face the pinion 60, and is configured to guide the rack 58 that is moved by the expansion and contraction operation of the fluid pressure cylinder 59.

In addition, the above-mentioned each assembly device 52 is used for each of the above-mentioned rotary tables 3.
A pair of valve springs B and a lower seat A are stacked on top of each other and the valve spring B is placed on the upper side and the lower seat A is placed on the lower side. The cylindrical member 62 is engaged with and supported by the lower end outer flange 63a of the inner cylindrical member 63 whose upper end is fixed to the fixed support plate member 56 (movable support plate member 57), and is fixed to the upper end of the cylindrical member 62. It is constantly urged downward by the spring force of a coil spring 64 compressed between the support plate member 56 (movable support plate member 57). The inner cylinder member 63 also has an engagement hole 69 at the lower end.
A rod 69 having a diameter a is inserted and arranged, and the upper end of the rod 69 is attached to the fixed support plate member 56 (movable support plate member 57).
A piston rod 65 of a fluid pressure cylinder 65 provided in
It is fixed to the tip of a. Furthermore, the cylindrical member 6
A plurality of openings 62b, 62b, . A plurality of notch balls 66, 66 as protruding and retractable members,
... are provided so as to be retractable in the radial direction from each of the openings 62b.

The notch balls 66 are made to protrude radially outward from the openings 62b by the expansion operation of the fluid pressure cylinder 65, and in this protruding state, the cylindrical member 66
The valve spring B and the lower seat A, which are externally fitted to the valve spring B and the lower seat A, are supported by the upper half of the cylindrical member 62 as shown by solid lines, and are retracted radially inward from the openings 62b by the contraction operation of the fluid pressure cylinder 65. In this retracted state, the valve spring B and lower seat A of the upper half of the cylindrical member 62 can be moved to the lower half of the cylindrical member 62. Further, a cylindrical pressing member 67 is externally fitted near the upper end of the cylindrical member 62 so as to be movable downward, and the suppressing member 67 is connected to the fixed support plate member 56 (
It is connected to the tip of a piston rod 68a extending downward of a pressing cylinder 68 provided on the movable support plate member 57).

Then, with the tip (lower end) of the cylindrical member 62 pressed against the cylinder W, and the fluid pressure cylinder 65
With each notch ball 66 immersed in the cylindrical member 62 (each opening 62b) by the contraction operation, the above-mentioned suppression cylinder 6
By moving the pressing member 67 downward by the extension operation of 8, the valve spring B and lower seat A externally fitted to the upper half of the cylindrical member 62 are moved upward from the state shown by the solid line to the state shown by the imaginary line. It is assembled into the cylinder head W by pressing it further downward.

Next, the procedure for assembling the above-mentioned embodiment will be explained by using the apparatuses 52 and 52 to assemble a set of valve springs B and mouth seats A that overlap one another to the cylinder head W.

First, the cylinder head W, on which the predetermined parts have been assembled, passes from the vehicle type detection station S1 to the reversing station S6, and then is transferred to the station S7 for spring and lower seat assembly, where it is placed on the rotating tables 3, 3 again. A set of supplied and assembled valve springs B and lower seats A that are stacked one above the other are waiting at the take-out position.
When the robot 55 is in the retracted state at 66°, the lowering movement of the robot 55 causes the two cylinder members 62 and 62 to be externally fitted into the upper halves of the two cylindrical members 62 and 62, and the subsequent expansion operation of the fluid pressure cylinder 65 causes the notch balls 6δ to be moved in the radial direction. The valve springs B and lower seats A are supported by the upper half portions of the respective cylindrical members 62 by protruding.

Next, the robot 55 moves up and rotates to position each cylindrical member 62 above the waiting cylinder head W, and the robot 55 moves down to position each cylindrical member 62 above the waiting cylinder head W.
2. Press the tip of the rod 69 against the cylinder head W, and
Positioning is performed by engaging the engagement hole 69a at the tip with the stem head of the valve D mounted on the cylinder head W.

Thereafter, the rod 69 is moved upward by the contraction operation of the fluid pressure cylinder 65, so that each of the notch balls 66 is retracted radially inward, and the support of the valve spring B and lower seat A is released.

Thereafter, the pressing member 67 is lowered by the expansion operation of the pressing cylinder 68, thereby causing the valve spring B to be lowered.
Then, the lower seat A is moved downward along the cylindrical member 62 and assembled into the cylinder head W.

As described above, in this embodiment, a plurality of notch balls 66, 66, .
A pair of valve springs B and a lower seat A supported by the protruding action of the above-mentioned notch balls 66 are held in a state where the tip of the cylindrical member 62 is pressed against the cylinder head W.
By moving the pressing member 67 downward in the retracted state, the lower seat A is moved downward from the upper side to be assembled to the cylinder head W. Therefore, the lower seat A can be assembled by a distance corresponding to the length of the valve spring B. A short assembly can be performed by a movement, and as a result, compared to a case where the assembly is a long movement, a part of the assembly may come into contact with the side wall of the cylinder head W, resulting in a defective assembly, or the assembly may be caused by the equipment and the cylinder head. Problems such as damage to the W side wall can be eliminated as much as possible.

Furthermore, as mentioned above, in the two types of assembly of valve spring B and lower seat A, the parts are assembled at the same time. Assembly time can be shortened.

Further, one assembly station (assembly is a device) can be omitted, and the assembly line as a whole can be simplified.

(Effects of the Invention) As explained above, according to the present invention, a spring for biasing and supporting a valve mounted on a cylinder head of an engine upward, and a lower seat for supporting a lower end of the spring are provided. When assembled to the cylinder head, the spring and lower seat, which are supported by external fitting on the upper half of the cylindrical member, are moved into the lower half of the cylindrical member by the retracting action of the retractable member. It is made possible to move, and in this state, the suppressing member is moved downward to press the suppressing member downwardly from above. Therefore, when assembling the lower seat, a short distance corresponding to the length of the spring can be performed by movement, and a long installation can be caused by movement, and a defective installation may result in damage to the equipment and the side wall of the cylinder head. problems can be eliminated as much as possible. Furthermore, in the two types of assembling, the parts can be assembled at the same time, and the overall assembling time can be shortened. Further, one assembly station (assembly is a device) can be omitted, and the overall assembly can be simplified.

[Brief explanation of the drawing]

FIG. 1 is an enlarged longitudinal side view of the device showing the assembly of the spring and lower seat according to the embodiment of the present invention, and FIG. 2 is a front view of the same.
Fig. 3 is a plan view of the same, Fig. 4 is an explanatory diagram of the line for parts assembly, Fig. 5 is a plan view of the parts supply equipment installed at the station for assembling the spring and lower seat, and Fig. 6 is the front view of the same. 7 is an enlarged side view of the spring supply device, FIG. 8 is an enlarged view of the coil spring direction determining device, and FIG. 9 is an enlarged side view of the posture correction robot. 52... Spring and lower seat assembly is done by equipment, 6
2... Cylindrical member, 62a... Hole, 66... Notch ball, 67... Pressing member, A... Lower seat, B
...Valve spring, D...Valve, W...Cylinder head.

Claims (1)

[Claims] (1) A device for assembling a spring for upwardly biasing and supporting a valve mounted on the cylinder head of an engine, and a lower seat for supporting the lower end of the spring, to the cylinder head, the spring being attached to the upper side of the cylinder head. A cylindrical member is fitted outwardly with the lower seat disposed on the lower side, and a cylindrical member is provided in the middle of the hole in the center line direction of the cylindrical member so as to be able to protrude and retract in the radial direction, and is protruded from the cylindrical member. a retractable member that supports the externally fitted spring and lower seat in the upper half of the cylindrical member, and allows the spring and lower seat of the upper half of the cylindrical member to move to the lower half of the cylindrical member in a retracted state; It is externally fitted near the upper end of the cylindrical member so as to be movable downward, and is externally fitted to the upper half of the cylindrical member by moving downward with the tip of the cylindrical member pressed against the cylinder head and with the retractable member retracted. 1. An assembly device for a spring and a lower seat, comprising: a pressing member that presses and moves the spring and the lower seat from above to below and assembles the spring and the lower seat to a cylinder head.