JPH0144460B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for automatically assembling valve-related parts to a cylinder head of a vehicle engine.

(Prior Art) As shown in Fig. 1, a cylinder head includes a valve V to be inserted into a valve guide G fitted into the cylinder head W, a spring SP for operating the valve V, and a spring SP for operating the valve V. A spring seat S used to receive the lower end of the spring SP, a stem seal SS fitted to the end of the valve guide G, and a retainer R and a retainer C assembled to the shaft end of the valve V are assembled. be.

However, various problems have conventionally occurred in the method of assembling each component. In other words, in the past, workers performed manual inspections that also served as visual inspections, but this was not only inefficient, but also caused them to be easily distracted when performing simple tasks, resulting in workers sometimes forgetting to insert parts. This may cause problems such as having to be checked again by another worker in the subsequent process, and accidents such as injuries to hands and fingers inside the cylinder head, which is a blind hole, may occur. It tended to happen. Furthermore, in the past, manual cylinder head tilting devices, etc., were used to assemble parts sequentially on the intake and exhaust sides to make the work easier, but because they were manual, they lacked speed. There was a problem.

(Problems to be Solved by the Invention) The present invention has been made in view of the above points, and by mechanically assembling parts around the valve, work efficiency is greatly improved and there is no need to forget to assemble the parts. To provide an automatic assembling device for valve-related parts that can be assembled on both the intake side and the exhaust side sequentially to achieve complete automation. It is something.

(Means for Solving the Problems) The present invention is characterized by a device that automatically assembles parts around the valves to the cylinder head of an engine, and the parts around the valves on the intake side and the exhaust side. A component supply device that can be arranged on a pair of delivery tables and arranged in parallel to each other at a predetermined delivery position, and between the parts above the delivery position and the cylinder head. A support stand that moves at the same time, and two sets of chucks disposed on the support stand and arranged in parallel above the unloading position are lowered simultaneously, and the chucks on the respective unloading stands are lowered by the respective chucks. Check the parts around the valves on the intake side and exhaust side, and if it is above the cylinder head, lower the chuck part separately and assemble the checked parts around the valves to the valve guides on the intake side and exhaust side. A valve-related parts assembly device consisting of a parts assembly unit and a cylinder head are set, and the cylinder head is tilted in accordance with the descending order of the chuck portions in the valve-related parts assembly unit.
The present invention is an automatic assembly device for valve-related parts of a cylinder head of an engine, which comprises a cylinder head tilting device that supports the axis of a valve guide so as to be perpendicular to a floor surface.

(Examples) The present invention will be described in more detail below with reference to illustrated examples.

In order to facilitate understanding, this embodiment will be described using an example in which a spring seat among parts around a valve is assembled. In the figure, 1
is a spring seat feeding device.

The spring seat supply device 1 stores spring seats S, vibrates them by operating a vibrator (not shown) attached to the lower part of the spring seats, and delivers a fixed number of spring seats (8 in the illustrated embodiment).
The stocker 2, 2 for the intake side and the exhaust side are moved forward, and the shaft is actuated by the operation of the solenoid 3, which protrudes at a predetermined timing near the front end of the stocker 2, 2 and comes into contact with the spring seat S. 4 as a fulcrum and protrudes, a hydraulic cylinder 6 that operates when the spring seat S is positioned, and a pair of guide rods 7 when the piston rod 6a of the hydraulic cylinder 6 is extended. 7 and a pin support plate 10 fixed to the lower end of a piston rod 9a of a hydraulic cylinder 9 vertically fixed to the pin support plate 8. A transfer device 12 consisting of pins 11, 11, . The hydraulic cylinders 14a are arranged so that one of them, for example, the intake side loading platform 14, is parallel to the other side, that is, the exhaust loading loading platform 14'.
and spring seat delivery tables 14, 14' which are moved using rails 14b. still. 13 is a spring seat receiving groove.

Reference numeral 15 denotes a spring seat assembly device, which includes a support stand 16, hydraulic cylinders 17, 17' disposed on the support stand 16, and the hydraulic cylinders 17, 1.
The two chuck portions 18, 18' connected to the lower ends of the piston rods 17a, 17a' of the piston rods 17a, 17a' are engaged with the notches (not shown) provided in the piston rods 17a, 17a', and the link member 19a ,19
It consists of an assembly unit 21 consisting of piston rod lowering prevention plates 20, 20' connected to solenoids 19, 19' via a'. Further, the chuck portions 18, 18' are fixed perpendicularly to the lower surface of support plates 22, 22' fixed to the lower end of the piston rod, and are fixed to the receiving surface of the spring seat S.
A cylinder having a required wall thickness, provided with air passages 24, 24' that are open at one end on the lower end pressing surfaces 23a, 23a' that contact Sa, and open at the other end on the outer surface of the central part in the length direction. shaped pressing members 23, 23'
and, at the lower end inside the cylindrical pressing members 23, 23',
Axial slits 27a, 27a' are fixed to the lower ends of moving shafts 26, 26' which are held movably in the axial direction within the cylindrical pressing members 23, 23' with springs 25, 25'. one end is connected to the open end of the outer surface of the cylindrical pressing member 23, 23' of the air passage 24, 24', and the other end is connected to an air supply pump or the like. Pipe 29 connected to air supply source 28
and a solenoid valve 30, a pressure reducing valve 31, and an assembly detection switch 32 provided in the middle of the pipe 29.
and an assembly detection means 33 consisting of.

Regarding the assembly detection switch 32, for example, in this embodiment, eight spring seats S are assembled at the same time, so if even one spring seat S is not assembled, the eight switches that operate integrally are activated. Part 18,1
8' cylindrical pressing member 23, 23' lower end pressing surface 2
There is a gap equal to the thickness of the spring seat receiving surface between 3a, 23a' and the cylinder head surface.
For this reason, detection is made when the compressive force of the air weakens and does not operate.

Reference numeral 34 denotes a cylinder head tilting device, which is used to sequentially assemble spring seats to each of the intake and exhaust side valve guides.
7 and 27' are made to coincide with each other.

The cylinder head tilting device 34 includes a base 35 and a rising portion 3 protruding from the top of the base 35.
5a, a V-shaped support member 37 and a horizontal lever 38 are fixed to both ends of the rotation shaft 36, respectively, and a horizontal lever 38 is provided on the base 35. A stopper pin 40 having a solenoid 39 on the lower surface of one end of the lever 38 comes into contact with the stopper pin 40 at a predetermined timing, and a hydraulic cylinder 41 having the tip of its piston rod connected to the opposite end of the horizontal lever 38 from the stopper pin 40. , a cylinder head holding plate 42 fixed to the upper part of the V-shaped support member 37 and tilted by the tilting of the V-shaped support member 37; The angle regulating pins 43 and 44 regulate the angle of inclination when the supporting member 37 tilts.

In addition, in the figure, 45 is a column in the automatic valve assembly device, and 46 is a support arm that is attached to the column 45 so as to be rotatable in the horizontal direction, and to which the support base 16 of the spring seat assembly device 15 is fixed. . Reference numeral 47 denotes a motor that serves as a rotational drive source for the support arm 46. A gear 48 fixed to the rotation shaft of the motor 47 meshes with a gear 49 on the support arm 46 side, and the motor 47 is operated to rotate the support base 16. is moved horizontally by a required angle.

Incidentally, an automatic assembling device for valve-related parts other than the spring seat S can also be constructed in the same manner as described above, with chuck parts 18, 18' corresponding to each part.

(effect) Next, the operation of the above embodiment will be explained.

The spring seats S in the stockers 2, 2 are gradually moved to the front part of the stockers 2, 2 by the vibration of a vibrator (not shown). The transferred spring seat S is transferred to the stocker 2,
When it reaches near the front end of 2, solenoid 3 is activated,
A positioning stopper 5 projects with the shaft 4 as a fulcrum. As a result, the plurality of spring seats S are aligned in a line. Next, the hydraulic cylinder 9 of the pin support stand 8 waiting above the spring seat S is activated, and the pins 11, 11, . . . are lowered and inserted into the valve guide insertion holes of the spring seat S. In this state, the hydraulic cylinder 6 is then operated to move the pin support stand 8 along the guide rods 7, 7, and move the spring seat S onto the spring seat carry-out stands 14, 14'. Spring seat S is spring seat carrying platform 1
4, 14', the hydraulic cylinder 9 is actuated to raise the pins 11, 11... again, and at the same time, the hydraulic cylinder 6 is actuated to return the pin support base 8 to its original position.

In this way, the spring seat carrying out table 14,
When the spring seat S moves above the spring seat 14', the hydraulic cylinder 14a is activated and the unloading platform 1 on the intake side is activated.
4 is moved parallel to the carry-out table 14' on the exhaust side, and thus both the carry-out tables 14, 14' are arranged parallel to each other at a predetermined carry-out position.

Next, the spring seat assembly device 15 rotates above this unloading position and stops. At the same time as the spring seat assembly device 15 stops, the solenoids 19, 19' operate, and the link members 19a, 1
Piston rod lowering prevention plates 20, 2 via 9a'
0' in the piston rods 17a, 17a' (not shown). Remove from. In this state, the hydraulic cylinders 17, 17' are operated, and the chuck portions 18, 18' are lowered.

When the chuck parts 18, 18' are lowered in this way, the cylindrical fitting members 27, 27' of the chuck parts 18, 18' are fitted into the valve guide fitting holes of the spring seats S on the respective loading tables 14, 14'. be done. When the cylindrical fitting members 27, 27' of the chuck portions 18, 18' are fitted into the valve guide fitting hole of the spring seat S, the slits 27a, 27a' of the cylindrical fitting members 27, 27' are narrowed. However, on the contrary, the effect is to return to the original state by the amount of narrowing, and this makes it possible to check. When the spring seat S is chucked by the chucks 18, 18', the hydraulic cylinders 17, 17' operate to raise the chucks 18, 18'. chuck part 18,
When the piston rods 18' reach the rising end, the piston rods of the hydraulic cylinders 17, 17' are prevented from lowering by the engagement of the piston rod lowering prevention plates 20, 20'. Further, while the chuck portions 18, 18' are being raised, the support base 16 rotates above the cylinder head W and stops above the cylinder head W.

The chuck parts 18, 18' are the cylinder head W
When the cylinder head is directly above W, the cylinder head tilting device 34 is activated, and the cylinder head is moved so that the intake side or exhaust side valve guide is perpendicular to the floor.
Tilt it. The cylinder head tilting device 34
The cylinder head W is supported horizontally as shown in FIG. 8 until the chuck parts 18, 18' are directly above the cylinder head W. When it reaches the top, start tilting and tilt the cylinder head. For tilting, the solenoid 39 is first activated to retract the stopper pin 40 from the lower surface of the horizontal lever 38. At the same time, the hydraulic cylinder 41
is activated, and the horizontal lever 38 is rotated clockwise or counterclockwise in the figure. Accordingly, the V-shaped support member 37 fixed to the rotation shaft 36 rotates until it comes into contact with either of the angle regulating pins 43 and 44.
This allows the cylinder head W to be supported while being inclined at a required angle. FIG. 9 shows a state in which the cylinder head tilting device 34 is activated to assemble the spring seat to the exhaust side valve guide, and the cylinder head W is tilted. In this state, the hydraulic cylinder 1
The piston rod 7' becomes ready to be lowered (the solenoid 19' is activated and the piston rod lowering prevention plate 20' is removed from the notch in the piston rod via the link member 19a').Next, by the operation of the hydraulic cylinder 17' The chuck portion 18' is lowered, and external fitting of the chucked spring seat S to the valve guide G begins. Furthermore, the chuck portion 18'
When the valve guide G descends, the lower surface of the cylindrical fitting member 27' comes into contact with the upper surface of the valve guide G and is prevented from descending any further. When the chuck portion 18' further descends from this state, the receiving surface Sa of the spring seat S is pressed by the lower end pressing surface 23a' of the cylindrical pressing member 23', and the spring seat S comes into contact with the cylinder head W. . In this state, air at a constant pressure is pumped from an air supply source 28 such as an air pump, and sent through a pipe 29 into the air passage 24' of the cylindrical pressing member 23'. The pressure of this air sent in is detected by a detection switch 32 to detect whether or not the spring seat is assembled.

When all the spring seats have been assembled, the hydraulic cylinder 17' is operated to raise the chuck portion 18' and return it to its original position. When the piston rod 17a' of the hydraulic cylinder 17' returns to its original position, the piston rod lowering prevention plate 20'
is locked and prevented from descending.

Once the intake side spring seat has been assembled in this way, the cylinder head tilting device is then tilted to the opposite side as shown in Figure 10, and the intake side is assembled in exactly the same process as above. be.

When the assembly of the spring seat is completed in this manner, the support stand 16 is again rotated above the spring seat carrying stands 14, 14' in order to chuck the next spring seat.

(Effects of the Invention) The present invention has the above-mentioned configuration and operation, and since it is possible to mechanically assemble a plurality of parts around the valve at the same time, the work efficiency is greatly improved compared to the past. It is something that can be done.

It also prevents parts from being forgotten to assemble, which was a common problem in the past, and can be assembled sequentially on both the intake and exhaust sides, making it possible to achieve complete automation. There are many things that can be put to practical use and have divine benefits.

[Brief explanation of drawings]

Figure 1 is a sectional view of the cylinder head before valve installation, Figure 2 is a plan view of the spring seat supply device, Figure 3 is a front view of the same, and Figure 4 is a side view of the spring seat supply device and spring seat assembly device. Fig. 5 is an explanatory diagram of the present invention installed in an automatic valve assembly device, Fig. 6 is an enlarged sectional view of the chuck portion, Fig. 7 is an explanatory diagram of the spring seat detection means, and Figs. FIG. 10 is an explanatory diagram of the operation of the present invention. 1...Spring seat supply device, 14,1
4'...Spring seat carrying stand, 15...Spring seat assembly device, 16...Support stand, 18,
18'...chuck part, 21...assembly unit,
34... Cylinder head tilting device.

Claims (1)

[Claims] 1 A device that automatically assembles valve-related parts to the cylinder head of an engine, which allows valve-related parts on the intake side and exhaust side to be arranged and supplied on a pair of loading tables, respectively, and to supply both parts. a parts supply device in which an unloading table can be arranged parallel to a predetermined unloading position; a support stand that moves between above the unloading position and above the cylinder head; In the case of the upper part, two sets of chucks installed in parallel are lowered at the same time, and the parts around the valves on the intake side and exhaust side on each loading table are checked using the respective chucks, and then the parts are placed above the cylinder head. A valve-related parts assembly unit consisting of a valve-related parts assembly unit that lowers the chuck portion separately and assembles the chucked valve-related parts to the intake side and exhaust side valve guides in sequence, and a cylinder head. a cylinder head tilting device that supports the axis of the valve guide so that it is perpendicular to the floor surface by tilting the cylinder head in accordance with the descending order of the chuck portion in the assembly unit of the valve-related parts; An automatic assembly device for valve-related parts to the cylinder head of an engine.