JPH0144461B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for automatically assembling a valve to a cylinder head of an engine.

(Prior Art) In the work of assembling valves to the cylinder head of a vehicle engine, the number of parts to be assembled is relatively large and the work is quite detailed, so conventionally most of the work has been done manually by workers. was. That is, as shown in Fig. 1, in order to assemble the valve to the cylinder head, the valve guide G inserted into the cylinder head W is
the valve V to be inserted into the spring seat S,
It is necessary to assemble the stem seal SS, the valve spring SP, the retainer R, and the retainer C, and this work must be done inside the blind hole of the cylinder head W, making the work quite difficult. For these reasons, most of the work has traditionally been done manually by workers. However, in such manual assembly work by workers, it is easy to forget or make mistakes in assembling parts, and reversing the cylinder head requires a great deal of effort.

(Problems to be Solved by the Invention) The present invention has been made in view of the above points, and by fully automating the valve assembly work, the order of the parts to be assembled is determined and each part is assembled one by one. By reliably assembling all parts, and by mechanically reversing the cylinder head, it is possible to reduce the amount of labor required by the operator.

(Means for Solving the Problems) The present invention is characterized by a spring seat external fitting device for externally fitting a spring seat onto a valve guide fitted into a cylinder head, and a spring seat external fitting device for externally fitting a spring seat onto a valve guide fitted into a cylinder head. A stem seal fitting device for fitting the stem seal to the end of the valve guide after fitting the spring seat outward, and a stem seal fitting device for inverting the cylinder head after fitting the stem seal to the valve guide and after inserting the valve. a cylinder head reversing device; a valve insertion device for inserting a valve into a valve guide with the cylinder head reversed by the reversing device so that the side facing the combustion chamber faces upward; A spring assembly device for assembling the spring onto the spring seat after it has been reversed again and returned to its original state, and a retainer and retainer for fitting the retainer and retainer to the shaft end of the valve inserted into the valve guide. An apparatus for automatically assembling a valve to a cylinder head of an engine, comprising a fitting device.

(Example) Hereinafter, the present invention will be described in more detail with reference to illustrated examples.

The assembly order according to the present invention is the spring seat S
Fitting the stem seal SS onto the valve guide G → Fitting the stem seal SS to the end of the valve guide G → Inserting the valve V into the valve guide G with the cylinder head W turned over → Turning the cylinder head W over again This is done in the following order: assembling the spring SP onto the spring seat S in the state in which the spring SP is held in place, then fitting the retainer R and the retainer C onto the shaft end of the valve V.

Accordingly, the present invention provides a spring seat external fitting device 1 to a valve guide, a stem seal fitting device 2 to the end of the valve guide, a cylinder head reversing device 3, and a valve insertion device to the valve guide. 4, a spring assembly device 5 onto the spring seat, and a retainer/cotter fitting device 6 to the shaft end of the valve.

Further, in the figure, 7 is a cylinder head conveyor, and a plurality of cylinder head tilting devices 701 each having a jig are disposed at intervals along the conveyor. Reference numeral 8 denotes a cam holder transport conveyor for transporting the disassembled cam holder, and is arranged so as to move in synchronization with the transport of the cylinder head W and parallel to the transport path of the cylinder head W. Reference numeral 9 indicates a cam holder dismantling device, 10 an end bolt insertion device, 11 a leakage inspection device, 12 an extraction portion for cylinder heads that have passed the leakage inspection, and 13 an extraction portion for cylinder heads that have failed the leakage inspection.

As shown in FIGS. 2 and 3, the above-mentioned devices may be arranged opposite to each other across the cylinder head transfer path, or may be arranged linearly on one side of the cylinder head transfer path.

(Function) Next, referring to FIGS. 2 and 3, the cylinder head W, which has been transferred by the cylinder head conveyor 7 and set on the cylinder head tilting device 701 having a jig, is
First, the cam holder CH is disassembled by the cam holder disassembly device 9.

Note that the disassembled cam holder CH is placed on the cam holder transport conveyor 8.

Next, the end bolt E is inserted by the end bolt insertion device 10. Next, the spring seat S is externally fitted onto the valve guide G fitted into the cylinder head W by the spring seat external fitting device 1. Spring seat S on valve guide G
The cylinder head W fitted with the cylinder head is transferred and set on the second cylinder head tilting device 701, and the stem seal fitting device 2 fits the stem seal SS to the end of the valve guide G.
Next, the cylinder head is reversed by the cylinder head reversing device 3, and the valve V is sequentially inserted into each of the intake side and exhaust side valve guides G by the valve insertion device 4. After the valve is inserted, the cylinder head is turned over again by the cylinder head turning device 3 to its original state.

Next, the cylinder head W is transferred and set on the third cylinder head tilting device 701, and the spring SP is assembled onto the spring seat S by the spring assembling device 5, and then the retainer/cotter fitting device 6 is used to assemble the spring SP. Then, the retainer R and the retainer C are fitted onto the shaft end of the valve V.
Finally, a pressure leak test is carried out by the pressure leak test device 11, and cylinder heads that pass are taken out from the take-out section 12, and cylinder heads that fail are taken out from the take-out section 13.

Although details of each device will be described later, the operation of each device will be briefly explained here for ease of understanding.

When the cylinder head W is transferred and set onto the first cylinder head tilting device 701,
The cam holder disassembly device 9 in the state shown in FIG. 2 rotates toward the cylinder head side, moves onto the cylinder head W, and disassembles the cam holder CH of the cylinder head W. The cam holder dismantling device 9 is supported by a column 14 so as to be movable in the horizontal direction. This configuration will be explained in more detail with reference to FIGS. 2 to 4.

In the figure, reference numeral 14 denotes a support column, and a support frame 16 that is horizontally rotatable via a rotational drive mechanism 15 is attached to a substantially central portion of the support column in its length direction. Further, the support frame 16 is provided with a stopper rod insertion hole 17, and the stopper rod 18, which is attached to the support column 14 so as to be able to rise and fall, rises and is positioned by fitting into the stopper rod insertion hole 17. Furthermore, stopper rod 18
is fixed to the tip of the piston rod 19a of the cylinder 19 fixed to the column 14, and moves up and down automatically, but in addition to this, a manually operated stopper rod 20 is attached.

In addition, in FIG. 4, the support frame 16 has two sets of support stands, that is, the support stands 901 of the cam holder dismantling device 9.
Spring seat external fitting unit 104, which will be described later.
Although a support stand 102 is shown protrudingly provided for supporting the device, depending on the arrangement of each device, only one support stand may be provided protrudingly on one side.

Further, the support column 14 is erected on a support stand 22 that slides on a base 21 at a required timing. Reference numeral 23 denotes a rail of the support base 22, which is disposed in a direction perpendicular to the transfer path of the cylinder head. 24 is a cylinder for sliding the support base 22.

Therefore, the cam holder dismantling device 9 in the state shown in FIG. Due to the operation, the support 14 moves to the rail 2.
3 to the cylinder head side. Along with this, the cam holder dismantling device 9 also moves above the cylinder head, and when it is positioned directly above the column 14 stops. In this state, the cam holder dismantling device 9 descends to remove the cam holder from the cylinder head, and rises again. When the disassembly of the cam holder is completed, the support column 14 returns slightly to its original position and stops, at which point the cam holder disassembly device 9 descends and places the removed cam holder on the cam holder transport conveyor 8. When the placement is complete, it rises again, and at the same time, the support column 14 also returns to its original position. When it returns to the final end, the support frame 16 rotates and the cam holder dismantling device 9 returns to its original position. At the same time, the end bolts are inserted by the end bolt insertion device 10 in the same order as in the cam holder dismantling device 9. Note that 10a is an end bolt supply device.

Next, the cam holder dismantling device 9 of the support column 14 is
The spring seat external fitting unit 104 supported on the opposite side is the spring seat supply device 10.
Check the spring seat from step 1. At the same time as the chuck, the support frame 16 attached to the column 14 rotates, and the spring seat external fitting unit 1
04 toward the cylinder head side. At the same time, the support column 14 moves toward the cylinder head, and when the spring seat outer fitting unit 104 moves onto the cylinder head, it stops.

In this state, the cylinder head tilting device 7
01 is tilted, and the chuck portion of the spring seat external fitting unit 104 is lowered to externally fit the spring seat onto the valve guide. When the cylinder head is tilted by the cylinder head tilting device 701 and the valve guide on the intake side is tilted perpendicular to the floor surface, the spring seat on the intake side is fitted, and the spring seat on the exhaust side is fitted. When the valve guide is tilted perpendicular to the floor surface, a spring seat on the exhaust side is fitted into the valve guide. When the spring seat is externally fitted onto the valve guide by the spring seat external fitting unit 104 in this manner, the support column 14 is moved back to its original position and the support frame 16 is rotated. The cylinder head is then transferred and set onto the second cylinder head tilting device 701. In this state, the stem seal is fitted by the stem seal fitting device 2 in the same order as the spring seat external fitting device 1. A detailed explanation will be omitted.

Next, the cylinder head is reversed and the valve is inserted. The cylinder head reversing device 3 and the valve insertion unit 405 of the valve insertion device 4 are positioned and supported on opposite sides of the column 14 in the same manner as the cam holder disassembly device 9 and the spring seat fitting unit 104. When the cylinder head is set on the cylinder head tilting device 701, the column 14 moves along the rail 23 toward the cylinder head. When the cylinder head reversing device 3 moves directly above the cylinder head, the column 1
4 stops, and the cylinder head reversing device 3 descends, clamps the cylinder head with its clamp pieces, lifts it once, reverses it, and sets it on the cylinder head tilting device 701. When this is completed, the cylinder head reversing device 3 is raised again and the column 14 returns to its original position. When the post 14 is returned to its original position, the valve is then inserted into the cylinder head which is set in the inverted position.

This is done by rotating the support frame 16 and first moving the valve insertion unit 405 onto the valve supply device 401 on the intake side located on the right side in the figure, where the valve is gripped by the valve gripping means, and then the valve is further removed. The support frame 16 is rotated so that the insertion unit 405 faces the cylinder head side.
Next, at the same time, the support column 14 moves along the rail 23 toward the cylinder head and stops when the valve insertion unit 405 is positioned directly above the cylinder head.

Next, the cylinder head tilting device 701 is operated to tilt the cylinder head so that the valve is inserted into the valve guide on the intake side, and in this state, the valve is inserted by the valve pushing means of the valve insertion unit 405. When this is completed, the strut 14 is retracted to its original position, and the support frame 16 is rotated to direct the valve insertion unit 405 toward the valve supply device on the exhaust side on the left side of the figure. Here, the valve insertion unit 405 holding the valve on the exhaust side moves onto the cylinder head in the same manner as described above, and inserts the valve into the valve guide of the cylinder head. After the intake and exhaust valves are inserted in this way, the cylinder head is returned to its original state by moving the support column 14 back to the cylinder head side and using the reversing device 3. .

The cylinder head is then transferred to the third cylinder head tilting device 701. When the cylinder head is set on the third cylinder head tilting device 701, the spring seat outer fitting device 1
In the same order as above, the spring assembly device 5 and the retainer/cotter fitting device 6 assemble the spring and fit the retainer/cotter onto the shaft end of the valve.

Note that 501 is a spring supply device, 507 is a spring assembly unit, and 6a is a retainer/cottater supply device, and detailed explanation thereof will be omitted.

Next, each of the above devices will be explained in more detail.

First, the spring seat external fitting device 1 will be explained with reference to FIGS. 5 to 7.

The spring seat external fitting device 1 is attached to a spring seat supply device 101 that aligns and supplies a required number of spring seats, and a support frame 16 of the support column 14, and is attached to the upper side of the spring seat supply device 101 and the cylinder head. a support stand 102 that moves between the support stand 10 and the support stand 102;
2, the spring seat supply device 1
01, the two sets of chuck parts 103, 103 on the intake side and the exhaust side are lowered at the same time, and the spring seat S on the intake side or the exhaust side is chucked by each chuck part, and then the spring seat S on the intake side or the exhaust side is checked. In this case, the spring seat fitting device main body 105 consists of a spring seat fitting unit 104 that lowers the chuck portions 103 and 103 separately and sequentially fits the chucked spring seats onto the valve guide on the intake side or the exhaust side. It is what it is.

Further, the spring seat supply device 101
As shown in FIGS. 2 and 5, a pair of stockers 101a and 101a are arranged side by side in order to gradually transfer a plurality of spring seats on the intake side and the exhaust side to the front, and each of the stockers 101
A stopper pin 1 that protrudes at a predetermined timing at the front end of a to align the spring seats.
01b, a transfer device 101c that is disposed above each stocker 101a and moves the spring sheet from the stocker 101a onto a spring sheet delivery table described later, and a transfer device 101c that is disposed in front of each stocker 101a and is placed on the intake side or exhaust side. 101d and 101d on which spring sheets are placed, and one of the two carrying out tables 101d can be freely shifted to the other side by means of a cylinder 101e. Further, the spring seat external fitting unit 104 has chuck portions 103 and 10.
Hydraulic cylinder 104a, 1 for raising and lowering 3
04a, and the hydraulic cylinders 104a, 104a
mechanisms 104b, 104b for locking the piston rod of the piston rod at a predetermined timing;
03,103. Further, the chuck portions 103, 103 are connected to the hydraulic cylinder 1.
They are fixed perpendicularly to the lower surfaces of support plates 104c and 104c fixed to the lower ends of the piston rods 04a and 104a. A cylindrical pressing member 103a having a required wall thickness and having an air passage 103b whose end side is open to the outer surface of the center portion in the length direction, and the cylindrical pressing member 1
A cylindrical fitting member having an axial slit is fixed to the lower end of a moving shaft 103d which is held movably in the axial direction within the cylindrical pressing member 103a with a spring 103c. 103e, a pipe 103g having one end connected to the open end of the outer surface of the cylindrical pressing member 103a of the air passage 103b and the other end connected to an air supply source 103f such as an air supply pump; Solenoid valve 1 installed in the middle
03h, pressure reducing valve 103i and external fitting detection switch 1
03j and external fitting detection means 103k.

Incidentally, here, the cylinder head conveyor 7
The cylinder head tilting device 701 disposed in the middle of the cylinder head will be explained.

The cylinder head tilting device 701 is mounted on the base 7.
01a, and a rotation shaft 701 horizontally penetrating through a rising portion 701b protruding from the top of the base 701a.
c, a V-shaped support member 701d fixed to both ends of the rotating shaft 701c, and a horizontal lever 701.
e, a solenoid 70 is provided on the base 701a, and a solenoid 70 is provided on the lower surface of one end side of the horizontal lever 701e.
A stopper pin 701g that has an angle of 1f and comes into contact at a predetermined timing, a hydraulic cylinder 701h whose piston rod tip is connected to the end of the horizontal lever 701e opposite to the stopper pin 701g, and the V-shaped support member 701d.
The V-shaped support member 701d is fixed to the upper part of the V-shaped support member 701d.
It consists of a cylinder head holding plate 701i that tilts when the cylinder head is tilted, and an angle regulating pin 701j that is provided on the base 701a and regulates the inclination angle when the V-shaped support member 701d tilts. be.

Next, the stem seal fitting device 2 will be explained with reference to FIGS. 8 to 10. It has a stem seal supply device 2a having the same configuration as the spring seat supply device 101, a support stand 201 attached to the support frame 16 of the support column 14, and lifting devices 202, 202 disposed on the support stand 201. Stem seal holding part 20 that can be raised and lowered
3, 203, and a stem seal fitting device main body 205 consisting of a lifting/lowering control mechanism 204, 204 for the stem seal holding portion.
A cylindrical support member 203 connected to 2, 202
a, 203a and the cylindrical support member 203a, 20
Rod 203b, 2 slidably fitted into 3a
03b, a cylindrical pressing part 203c' at the lower end fixed to the lower end of the rod 203b, 203b,
203c' and the cylindrical pressing part 203
The holding members 203c and 203c have pins 203c and 203c projecting from the center portions of the holding members c' and 203c' to fit into the valve insertion hole of the stem seal. Note that 203d is a spring.

Next, the cylinder head reversing device 3 will be explained with reference to FIGS. 11 to 13. The cylinder head reversing device 3 has support plates 302, 302 suspended at both longitudinal ends of a rectangular support stand 301 that is attached to the support frame 16 of the support column 14 and can be raised and lowered using a required lifting device. ,
Guide rods 303, 3 are provided between the support plates 302, 302.
03 and the guide rods 303, 303.
A pair of plate-shaped brackets 305, 305 are attached to the plate-shaped brackets 305, 305, which move along the same and are brought into contact and separated by a required drive mechanism 304 consisting of a cylinder 304a, a link mechanism 304b, etc. Rotation shaft 30 for each
6, 306 to pivot the clamp pieces 307, 307, and a required drive mechanism 308 to rotate the clamp pieces 307, 307 at a predetermined angle.

Further, the drive mechanism 308 includes a pulley 308a fixed to a rotating shaft 306, a pulley 308c fixed to a rotating shaft 308b attached to one bracket 305, and a pulley 308c stretched between the pulleys 308a and 308c. A belt 308d, a hydraulic cylinder 308e fixed to the one bracket 305 and having the tip of its piston rod connected to an eccentric point of the pulley 308c, one end connected to the rotation shaft 308b and the other end connected to the other. A spline shaft 308f passing through the bracket 305, pulleys 308g and 308h provided on the other bracket side, and a belt 308i stretched between the pulleys 308g and 308h.
It consists of.

Next, the valve insertion device 4 will be explained with reference to FIGS. 14 and 20.

The valve insertion device 4 has an oil storage tank 401b provided with a valve holding cylinder 401a for holding valves in the center according to the number of valves, and an oil recovery case 40.
A plurality of valve supply devices 401 are arranged in parallel on a support stand 401d in 1c, and hold the valves V in a removable manner with their heads facing upward; The valve supply device 40 is raised and lowered by a lifting device.
A valve gripping means 403 for removably gripping the valve and a valve pushing means are attached to support plates 402, 402 which are moved between the upper part of the cylinder head 1 and the upper part of the cylinder head which is set with the side face up on the combustion chamber side. A valve insertion unit 405 is provided with a means 404, and the valve insertion unit 40 is tilted by a cylinder head tilting device 701 so that the axis of the valve guide on the intake side is vertical.
5, the valve on the intake side is inserted, and with the valve cylinder head tilted so that the axis of the valve guide on the exhaust side is vertical, the valve on the exhaust side is inserted using the valve insertion unit 405. It is.

Further, the valve gripping means 403 has a hydraulic cylinder 403a below the support plate 402, and is moved in the same direction as the support plate 402, and has a guide groove having a slightly larger diameter than the valve shaft on the end face. Member 403b and support shaft 403
a lever 403 that is rotatably supported by a lever 403 and rotated by the operation of a hydraulic cylinder 403d;
The guide member 403b fixed to the end of e.
and a lid body 403f for opening and closing the guide groove.

Further, the valve pushing means 404 includes a valve pushing rod 404b that passes through the support plate 402 vertically movably at right angles and has a weight 404a at its upper end, and a hydraulic cylinder 404c that is fixed to the support plate 402. A hydraulic cylinder 404e is fixed to the support plate 402; It consists of a valve pressing rod member 404f that is raised and lowered and presses the upper end of the valve pressing rod 404b with a horizontal projecting portion 404f'.

Further, the other part 407 has a cylindrical shape, and has an opening at one end as a receiving part for the end of the valve guide, and is connected to a required intake device (not shown), and is raised and lowered at a predetermined timing via a required lifting device. It is a valve suction device.

Further, 408 is a light projecting tube 408a and a light receiving tube 408.
This is a valve insertion detection device consisting of (b), which detects whether the shaft end of the valve V is correctly inserted into the mouth of the valve guide G. 409 is a stem seal fitting detection device consisting of a light projecting tube 409a and a light receiving tube 409b, which detects whether the stem seal SS is correctly fitted to the valve guide G or not.

Next, the spring assembly device 5 will be explained with reference to FIGS. 21 to 25.

A passage 502 includes a spring supply device 501 having the same configuration as the spring seat supply device 101, and in which a valve spring of a stocker 502 in the spring supply device 501 whose pitch is narrowed at the bottom moves in an upright position.
a baffle plate 5 for checking the top and bottom of the spring, which has the required wall thickness and whose tip part slightly enters the inner diameter of the spring from the side;
03, and further includes the support column 14.
A pair of claw members 50 are attached to the support frame 16 and disposed above the spring supply device 501, and are inserted into the inner diameter of the spring provided at the lower end.
4, 504 with a required drive mechanism 505 to open and close the spring holding portion 506, and a spring assembly unit 507 with a required lifting device to raise and lower the spring holding portion 506.

In addition, 505a in the figure is a hydraulic cylinder, 5
05b is a pressing plate fixed to the tip of the piston rod of the hydraulic cylinder 505a, 505c is a pressing pin, 505d is an opening/closing lever, 505e is a support shaft, and 505f is a support plate, which constitute the drive mechanism 505. It is.

Next, the retainer/cotter fitting device 6 will be explained with reference to FIGS. 26 and 27.

The retainer/cotter fitting device 6 has a cylindrical retainer pressing member 602 that presses the retainer R with its lower end surface suspended from a base 601 that can be raised and lowered and that is attached to the support frame 16 of the pillar 14. At the same time, a cylindrical retainer pressing member 603 that presses the retainer C with its lower end surface is fitted into the retainer pressing member 602 so as to be movable upwardly against the spring 604, and is further inserted into the base 601 to press the retainer C. Retainer gripping members 605, 605 are provided below the member 602 to grip the retainer R from both sides around the retainer R.

Further, 606 is a retainer gripping member 605, 6
05 is the support shaft, 607 is the retainer pressing member 6
A spring 608 interposed between the retainer gripping members 605 and 605 is a rod whose lower end surface contacts the shaft end surface of the valve V. It is inserted into the pressure member 603. 609 is a spring interposed between the rod 608 and the base 601. 610 is a notch groove provided in the base 601.

(Effects of the Invention) Since the present invention has the above-described configuration and operation, it is possible to fully automate the valve assembly work, determine the order of parts to be assembled, and reliably assemble each part one by one. It is. In particular, since the valve is inserted into the valve guide with the cylinder head reversed so that its combustion chamber side faces upward, the insertion work is done from above, which simplifies the layout of the valve insertion device. Even if the rear cylinder head is turned over again, the stem seal is fitted into the valve guide in the previous process, so the valve will not fall out downwards, and the cylinder head is also turned over mechanically. This also reduces the amount of effort required by the worker. Further, since each device has almost the same structure, it is possible to share each device and parts, and therefore the cost can be relatively low.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the cylinder head with each part disassembled, Fig. 2 is an explanatory diagram of the arrangement of the first embodiment of the present invention, and Fig. 3 is an explanatory diagram of the arrangement of the second embodiment of the invention. , FIG. 4 is a partially enlarged longitudinal sectional view of the present invention,
Fig. 5 is a side view of the spring seat supply device and the spring seat external fitting device main body, Fig. 6 is an explanatory diagram of the chuck part and external fitting detection means in the spring seat external fitting device main body, and Fig. 7 is a side view of the spring seat external fitting device main body. 8 is a side view of the stem seal fitting device, FIG. 9 is an enlarged partially cutaway view of the stem seal holding portion, and FIG. 10 is a side view of the stem seal holding portion. FIG. 11 is a front view of the cylinder head reversing device, FIG. 12 is a side view of the cylinder head, FIG. 13 is a sectional view taken along line A-A in FIG.
Figure 4 is a side view of the valve insertion device and cylinder head tilting device, Figure 15 is a partially cutaway side view of the valve insertion device, and Figure 16 is a partially cutaway front view of the valve insertion device. 17 is a partially cutaway side view of the valve insertion device and the valve supply device, FIG. 18 is a partially cutaway front view of the valve feeder, and FIGS. 19 and 20 are An explanatory diagram of the valve insertion detection device and the stem seal fitting detection device, Fig. 21 is a side view of the spring assembly device main body and the spring supply device, and Fig. 22 is a partially cutaway view of the spring holding part in the spring assembly device main body. 23 is a side view of the spring holding part, FIG. 24 is a partially enlarged vertical cross-sectional view of the stocker in the spring supply device, and FIG. 25 is a side view of the spring holding part.
The figure is a plan view of the same, FIG. 26 is a central vertical sectional front view of the retainer/cotter fitting device, and FIG. 27 is a side view of the retainer/cotter fitting device. 1...Spring seat external fitting device, 2...Stem seal fitting device, 3...Cylinder head reversing device, 4...Valve insertion device, 5...Spring assembly device, 6...Retainer/cotter fitting device , 7... Cylinder head conveyor, 8
...Cam holder conveyor, 9...Cam holder disassembly device, 10...End bolt insertion device, 11...Pressure leak inspection device, 12...Pressure leak test passed cylinder head extraction section, 13...Pressure leak test Removal section for rejected cylinder heads.

Claims (1)

[Claims] 1. A spring seat external fitting device for externally fitting a spring seat onto a valve guide fitted into a cylinder head, and for fitting a stem seal onto the end of the valve guide after externally fitting the spring seat onto the valve guide. A stem seal fitting device, a cylinder head inverting device for inverting the cylinder head after fitting the stem seal to the valve guide and after inserting the valve, and a cylinder head inverting device for inverting the cylinder head so that the side facing the combustion chamber is upward. A valve insertion device for inserting the valve into the valve guide with the cylinder head reversed so that it faces the same direction, and a valve insertion device for assembling the spring onto the spring seat after the cylinder head is reversed again using the reversing device to return to its original state. An automatic valve assembling device for a cylinder head of an engine, which comprises a spring assembling device, and a retainer/cotter fitting device for fitting a retainer and a cotter to the shaft end of a valve inserted into a valve guide.