JPS59219133A - Chuck device - Google Patents

Abstract

PURPOSE:To securely control the move of cotters at the time of feeding and make the assembling of a retainer and said cotters smooth by making the inside of a chuck a double construction and separately holding a valve shaft and said cotters. CONSTITUTION:A chuck unit consists of a chuck body 21, three holding claws 22, a guide shaft 23, and a holding cylinder 24. The body 21 has a hollow bore 26, which holds the holding cylinder 24 and the guide shaft 23 inside in such a way that these are concentric and axially slidable. The holding claws 22 form a taperedly opening guide surface 41 and the amount of their opening is adjusted by means of a bolt-nut 43. In the lowering process of the unit 20, the claws 22 are brought in contact with the outer periphery of a retainer 8 and, thereby, these are opened and the retainer 8 is housed inside a receiving face 37. A valve shaft 5 passes through the inside of the hole 8a of the retainer 8 and passes between two cotters 9 which are opened, and the pushing-up force of a spring 6 causes the retainer 8 and the cotters 9 to be clamped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an automatic assembly method for assembling valve cocks and retainers of engine cylinder heads, for example.
In particular, the present invention relates to a chuck device for securely holding the clasp and retainer during assembly and operation.

The engine cylinder head has intake and exhaust valves. These valves are heavily biased by a spring, which abuts the surface of the cylinder head at one end and a retainer at the tip of the valve at the other end. This retainer is inserted into the tip of the valve and is attached to the retainer so that it cannot be removed by a cock. Therefore, in the engine assembly process, there is a process for assembling the retainer to the valve shirt 1-.

Conventionally, the retainer was assembled by holding the retainer and the valve shaft with a chuck, supplying it to the tip of the valve shaft 1-, pressing the retainer and cock onto the valve shaft 1- with an air cylinder, etc., and then attaching the cock to the valve shaft. It is fixed in the groove of the

In this conventional installation, the valve shaft and connector are positioned at the same time in the equipment, resulting in poor assembly or poor reliability, and an air cylinder is used to insert the retainer and connector. Because it is old, high pressure air piping is required.

Therefore, it is an object of the present invention to provide retainers and retainers to the valve seat and the valve seat with a highly reliable supply ability.
Another object is to provide a mechanical chuck mechanism that prevents duplicate feeding of retainers and footers and that can maintain chuck operation even during power outages. It is.

Based on the above, the present invention has a double structure inside the chuck, one part holds the retainer and the cock in position, and the other part holds the valve shirt 1-. The tips are mechanically restrained to allow for precise mutual positioning of the shaft and shaft.

1. Below, the configuration and functions of an embodiment of the present invention will be specifically explained based on the drawings.

First, FIG. 1 shows a cylinder head 1 of an engine. The head body 2 of the cylinder head 1 has intake and exhaust ports 3
This part holds the valve 4 so that it can be opened and closed. The valve shirts 1-5 of the valve 4 are each slidably supported on the head body 2 at a predetermined inclination angle, and are always urged in the closing direction by an external valve spring 6. . The valve spring 6 hits the head body 2 at one end with a spring seat 7,
Further, the other end portion is in contact with a retainer 8 fixed to the tip of the valve shaft 5. This retainer 8 is disk-shaped, and is inserted into the valve shaft 5 through a tapered hole 8a at the center, and is prevented from being removed by a clasp 9. Moreover, as shown in FIG. 2 and FIG.
It is a semicircular arc-shaped two-part type, and a protrusion 9a that engages with the locking groove 5a of the valve shirt 5 is formed on the inner circumferential surface of the upper end. Of course, the fitting 9 in the χ combination has an annular shape and is sized to fit inside the hole 8a, and its inner diameter corresponds to the outer diameter of the valve shaft 5.

Next, FIG. 4 shows an outline of the automatic assembly machine 10. This automatic assembly machine 10 is equipped with a feeder 12 for the retainer 8 and the roller 9, and a feeder 13 for the cylinder head 1 on a machine base 11. The supply device 12 is composed of a parts feeder, etc., and is connected to the hole 8a of the retainer 8.
With two knocks 9 installed inside the machine, the machine automatically guides the machine to the supply position. Further, the feeding device 13 fixes the cylinder head 1 to the second part of the jig 14, guides it to the processing station, and then sets the valve shaft 5 of the target valve 4 in the vertical direction for assembly. Further, a frame 15 is attached on top of the machine stand 11.

This frame 15 supports a horizontal guide shaft 16, and in this part a movable block 17 is held movably by a cylinder 18. Move again 1 cock 1
7 holds the chuck device 20 of the present invention movably up and down by a vertical cylinder 19.

Next, FIGS. 5 and 6 show a chuck device 2 of the present invention.
0 structure is shown. This chuck device 20 includes a chuck body 21, three holding claws 22, a guide shaft 23, and a presser cylinder 24 as main parts. 2. The main body 21 of the main body 21 has a hollow hole 26 at the center, and is fixed to a mounting base 27 with a mounting bolt 25 at the upper end.

Also, this mounting base 27 is attached to the board 29 by means of mounting bolts 28.
It is taken by f1 on the lower surface of Gζ. The hollow hole 26 of the chuck body 2 holds the presser cylinder 24 and the guide shaft 23 inside.
are held concentrically and slidably in the axial direction. The presser cylinder 24 is provided with a stopper 30 at its upper end portion, and is prevented from being pulled out by abutting this portion against a stepped portion 31 of the chuck body 21. This stopper 30 and mounting base 27
Since a coiled spring 32 is installed between the presser tube 24 and the lower surface of the presser tube 24, the presser tube 24 is biased in the advancing direction, that is, downward. The guide shaft 23 is inserted into the presser tube 24 and into the hole 33 of the mounting base 27 in a slidable state in the axial direction, and is pulled out in the advancing direction by a stopper 34 at the middle part and a stopper 35 at the upper end part. It is in a stopped state, and is strongly biased downward, that is, in the advancing direction, by a spring 36 provided between the stopper 34 and the mounting base 27. Note that the guide shaft 23
The lower end portion of the presser tube 24 is formed into an ellipsoidal spherical shape and protrudes slightly downward from the lower surface of the presser tube 24.

Further, the lower surface of the chuck main body 21 forms a receiving surface 37 which is an annular recess approximately equal to the outer diameter of the retainer 8.

The chuck main body 21 has three storage grooves 38 formed at each angle of 180 degrees with respect to the center.
is rotatably supported.

This holding claw 22 is held by a spring 40 at its upper end.
The lower end portion is biased in the direction of being compressed.

Further, this holding claw 22 forms a guide surface 41 that widens toward the end on the inner surface of the lower end, and an upper portion continuing from this guide surface 41.
A holding surface 42 is formed that moves away from the center toward one side. Note that the degree of opening of this holding claw 22 can be adjusted using an adjustment bolt/nut 43. Further, the mounting base 27 has a cylinder 44 formed at one or several locations between adjacent holding claws 22 to prevent duplicate holding. A piston 45 inside this cylinder 44,
It is biased in the backward direction by a return spring 4G provided between this and the chuck body 2I, and its piston rod 47 passes through a hole 48 in the chuck body 21, and the receiver protrudes from a part of the surface 37. . Note that driving pressurized air 50 is supplied from the air supply path 49 to one end of the cylinder 44.
The other end of the cylinder 44 communicates with the atmosphere through a communication hole 51.

Next, the movement of the automatic assembly machine 10 and the operation of the chuck device 20 will be explained.

The feed device I3 guides the throat 1 to the cylinder to the position of the processing station, and is on standby with the valve shaft 5 set in the vertical direction. On the other hand, the supply device 12 supplies the retainer 8 and the retainer 9 in an aligned state, and the cylinder head 1 with the two retainers 9 combined in an annular shape inside the hole 8a of one retainer 8.
A number corresponding to the number of valves, for example 4111 il, is supplied to a predetermined position. Thereafter, the cylinder 19 lowers the chuck device 20 of the present invention to one of the combined retainers 8 and 9. During the lowering process of the chuck device 2°, the guide surface 41 of the holding claw 22 comes into contact with the outer periphery of the retainer 8, so that the holding claw 22 opens against the elasticity of the spring 40. When the chuck device 20 is completely lowered to a predetermined position, the retainer 8 is housed inside the receiving surface 37 and is held within the holding surfaces 42 of the three holding claws 22.

After that, the cylinder 19 raises the chuck device 2o.
Then, the cylinder 18 moves the chuck device 2° to the water 117.
For assembly, the valve shaft 5 is moved to a position above the same position as the axis of the target valve shaft 5. Subsequently, the cylinder 19 lowers the chuck device 2o again, and moves the combined retainer 8 and clasp 9 to the upper end of the hull seatft 5. In the process of lowering the chuck device 20, the valve shaft 5 first passes through the hole 8a of the retainer 8,
Push the two sticks 9 out from the inside of the hole 8a of the retainer 8. At this time, the tip 9 is opened on both sides by the tip end surface of the guide shaft 23, that is, the elliptical spherical surface.

The valve shaft 5 has two valves 9 in its open state.
It passes through the center position and is inserted into the presser tube 24. At this time, the presser cylinder 24 contacts the upper surface of the retainer 9 with its lower surface, and receives a force in the direction of pushing the retainer 9 into the hole 8a of the retainer 8 due to the biasing force of the spring 32. Of course, the cylinder 19 lowers the chuck device 20 while receiving the upward elasticity of the valve spring 6.

After the chuck device 20 has been lowered to the home position, the cylinder 19 raises the chuck device 20.

At this time, the retainer 8 and the two retainers 9 are pushed up by the valve spring 6, so the protrusion 9a of the retainer 9 locks the valve shaft 5. It fits inside the M5a. At this time, the upward force of the valve spring 6 causes the retainers 8 and 4 to tighten the valve shaft 5 with their tapered surfaces, and the assembly of the retainer 8 and the studs 9 to the valve 4 is completed.

If the 7-chan chuck device 20 takes the retainer 8 home due to a mistake in assembly and goes to hold the next retainer 8 while holding that retainer 8, the chuck device 20 will cause an accident. Therefore, during the return process of the chuck 20, pressurized air 50 is sent into the air supply path 49. For this reason, the screws 1 to 45 resist the biasing force of the return spring 46, and the screws 1 to 45 of the piston 4 resist the biasing force of the return spring 46. ' 47 is made to protrude from the surface 37 to the outside.

As a result, when the retainer 8 is on the support surface 37, the screw 1-r1 head 47 forces the retainer 8 to fall. Therefore, even if the retainer 8 is taken home, it is possible to prevent the retainer 8 from being held twice.

In addition, in the first embodiment, the guide shaft 23 and the presser tube 24 are
are biased by springs 32 and 36, respectively, but the biasing means is not limited thereto, and may be applied, for example, by its own gravity. This also applies to the spring 40 of the holding claw 22.

In the present invention, the inside of the chuck has a double structure, and the Hartz shaft and cock are held down separately.
The movement of the retainers during feeding can be reliably regulated, so there are fewer assembly defects and the retainer and cock can be assembled smoothly.

Furthermore, if a cylinder is attached to prevent the product from being taken home, it is possible to prevent the product from being held twice and damage accidents can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the cylinder head, Fig. 2 is a plan view of the cock, Fig. 3 is a sectional view of the cock, Fig. 4 is a schematic side view of the automatic assembling machine, and Fig. 5 is a plan view of the cock. FIG. 6 is a cross-sectional view of the main parts of the chuck device during assembly. ■・・Cylinder head, 8・・Retainer, 9・・Kotta, 10・・Automatic assembly machine, 20・・Chuck device, 2
1... Chuck body, 22... Holding claw, 23... Guide ° shaft, 24... Presser tube, 26... Hollow hole, 37... Receiver &
, page 1.

Claims (2)

[Claims] (1) A holding means for a retainer which can be opened and closed and is biased to close is provided at the tip of the chuck main body having a hollow hole at the tip, and the guide shaft and presser tube can be advanced into the hollow hole so as to be able to move backward.
A chuck for automatic assembly of cocks and retainers, in which the retainer with a split cock housed in the center hole of the retainer is held by the holding means so that the tip of the guide shaft approaches or contacts the cock. Device. (2) The chuck according to claim 1, wherein the chuck body has a cylinder for preventing the retainer from being taken away, and the piston of the cylinder can protrude from the surface of the retainer. Device.