JPS6119376B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for automatically assembling a spacer for a combined ring of a piston of an internal combustion engine, particularly an internal combustion engine for automobiles, and is disclosed in Japanese Patent Laid-Open No. 49
This is a further improvement of the device shown in No.-57215.

The apparatus of the present invention will be described with reference to embodiments shown in FIGS. 1 to 16. First, Figure 1 is a plan view of this device.
FIG. 2 shows an elevational view of the spacer, in which a large number of spacers S to be assembled are stacked on the outer periphery of the magazine 1, which is vertically supported by an arm 11 provided on the support shaft 2 on the underframe B of this device. Retained. Magazine 1
In this embodiment, four are provided radially around the support shaft 2.

The support shaft 2 is vertically supported by a frame 14 on the underframe B, and a mechanism is provided in the frame for intermittently rotating the magazine by 90 degrees using a drive shaft using a suitable device such as a Geneva mechanism. ing.

A circular base plate 15 centered on the support shaft 2 is fixed on the frame 14, and a circular hole 16 is bored in one place of the base plate (on the right side in FIGS. 1 and 2). hole 16
The cylindrical center of the magazine 1 that holds the spacer to be assembled is brought to a position that coincides with the center of the hole 16, and the center of the cylinder of the magazine 1, which holds the spacer to be assembled, is brought to a position where it coincides with the center of the hole 16, which will be described later. The spacer is assembled as shown in FIG.

Reference numeral 4 indicates a cylindrical pusher which is moved up and down by an air cylinder C1 provided on the upper shaft plate 19 of this device, and the inner diameter of the pusher is slightly larger than the outer diameter of the magazine 1. The spacer held on the outer periphery is squeezed downward.

FIG. 3 is a partial sectional view showing the mutual relationship between the magazine, the operating tube 5 that moves up and down in the hole 16 and is involved in the operation of spacer assembly, and the piston to which the spacer is to be assembled. It has the same center line as the magazine and hole 16, and projects from a bracket 18 that is moved up and down by an air cylinder C2 fixed to the outer periphery of the outer frame 17.

The operating tube 5 is supported so as to be fitted into a smaller diameter hole below the resistor 16 and slidable up and down within the smaller diameter.

Also, two guide pieces 1 are provided on the outer periphery of the magazine 1 in a direction perpendicular to the line connecting the centers of the magazine 1 and the support shaft 2.
0 are installed in parallel at appropriate intervals.
(Figures 3 and 4) In the normal free state, the spacer S is elastic as shown in Figure 8, so its circular ring contracts and both ends overlap, so in order to fit it to the outer circumference of the magazine, The ring shape is enlarged and fitted. As shown in FIG. 6, the fitting is carried out so that both ends of the guide piece 10 abut against the outside of the guide piece 10 and elastically hold the magazine.

4 shows a cross section taken along the line aa in FIG. 2, and FIG. 5 shows a cross section cut along the line cc in FIG.

As shown in the fourth and fifth figures, the guide piece 10 of the magazine 1
An elastic piece 20 is attached to the lower end of the pusher 4 so that its free end is elastically pressed against the outer periphery of the magazine.The free end has an inclined surface 20' as shown in FIG. The pressed spacers push the free ends of the elastic pieces 20 outward by the slope 20', allowing them to be removed one by one from the magazine.

On the other hand, a leaf spring 6 (FIG. 7) is fixed at the right end of the base plate 15, on the right outer periphery of the hole 16, with its lower end approaching the outer periphery of the magazine, and like the elastic piece 20, it descends above the magazine. It elastically presses and holds the spacer and prevents it from descending.

Also, the base plate 1 is flush with the stepped portion 16' of the hole 16.
5, a stop lever 21 is installed via a pin 22. A spring 23 is attached to the pin 22, and as shown in the figure, one end of the spring 23 is engaged with a pin 24 provided on the stop lever 21, and the other end of the spring 23 is pressed against the side surface of the outer frame 17. It is assigned. The stop lever 21 is designed to be able to pivot about the pin 22, and the tip end 21' of the stop lever 21 is formed into a cutout groove 25 of the protrusion 8 provided at the upper part of the operation tube 5.
The spring 23 is biased toward the inside of the operating tube 5 through the spring 23 . The width 8' of the protrusion 8 is made slightly narrower than the guide piece 10 attached to the magazine, so that the spacer can be smoothly transferred from the magazine 1 to the operating tube 5. The pin 22
A pin 26 is fixed to a part of the outer peripheral surface of the cam plate 27.
is in contact with. The cam plate 27 is bolted to the bracket 18 which is moved up and down by a cylinder c2, and is in contact with the pin 26 with an inclined surface. A projection 7 is provided on the opposite side of the operation tube 5 opposite the projection 8 as shown in the figure. The height of the protrusion 7 is set lower than the height of the protrusion 8.

The shape of the projection of the operation tube 5 is shown in a perspective view in FIG. The operating tube 5 has a hollow cylindrical shape and has protrusions 7 and 8 at its upper part as shown. Square patch plates 28 are attached to the circumference of the operation tube 5 at five locations as shown in FIG.
The upper surface of the spacer is aligned with the upper surface of the operation tube to prevent the spacer from falling outward. For this reason, the outer frame 15
The inner periphery of the hole 16 is provided with a U-shaped notch 29 to allow the passage of the backing plate.

Below the circular hole 16 and the operating tube 5, a piston 3 is supported on a piston lifter 3' along the same center line as the circular hole 16 and the operating tube 5.

Next, the operation of assembling the spacer S based on the above configuration will be explained.

Figure 10, Figure 10-1 to Figure 12, Figure 12-
FIG. 1 shows a central cross section of the lower part of the magazine and the operating tube 5, and is used to explain the operation of spacer assembly.

The spacers S are manually held in a stacked state around the outer periphery of the magazine 1 as described above.

The lower end surface of the magazine 1 and the upper surface of the base plate 15 are on the same plane, and the operation tube 5 is
is raised and the tube 5 stops at a position where the upper edge of the tube 5 abuts against the lower end surface of the magazine 1.

With the operating tube 5 raised as described above, the piston 3 is lifted by the lifter 3' and supported in the circumferential space below the magazine, and the upper surface of the groove of the combined ring into which the spacer is to be fitted is located below the magazine. It is made to coincide with the end surface, that is, the upper edge of the operation tube 5. In this state, the pusher 4 is lowered by the air cylinder c1, and its lower end pushes down one spacer so that it is supported on the stepped portion 5' of the operating tube 5 as shown in FIG. The height of the stepped portion is slightly lower than the height of the spacer, and the spacer is sandwiched between the lower surface of the magazine and the stepped portion 5' of the operating tube 5.

When the spacer is lowered, the leaf spring 6 prevents the spacer above the lowered spacer from lowering.

The operation tube 5 is then lowered from the position shown in FIG. 10 by the air cylinder c2, but the step 16' of the opening 16 prevents the spacer from lowering, and the tube 5 descends downward.

The operating tube 5 continues to descend, and both ends of the open end (free end with a cut) of the spacer (see Figure 6) come off the top of the operating tube 5, and the spacer contracts due to its own elasticity. The piston is locked to the outer periphery of the lower part of the cylinder groove into which the piston is to be inserted.
The state will be as shown in Figure 1-1.

At this time, as the operating tube 5 descends, the cam plate 27 attached to the bracket 18 integrated with the operating tube 5 also descends, and the pin 26 is biased by the spring 23 along the inclined surface of the cam plate 27. It moves. With this movement, the tip 21' of the stop lever 21 enters the inside of the operating tube via the pin 24 engaged with the spring 23 and further enters under the piston ring groove. In other words, when the spacer is contracted and fitted under the ring groove of the piston, the tip 21' of the stop lever 21 is inserted between both ends of the spacer to prevent the spacer from rotating along the outer periphery under the groove. It is prevented. On the other hand, the portion on the opposite side facing the open end of the spacer is prevented from entering the piston ring groove by the upper projection 7 of the operating tube 5. When the operating tube 54 is also lowered, the spacer is removed from the projection 7 and is fitted under the piston ring groove, resulting in the state shown in FIGS. 12 and 12-1.

Next, the operation tube 5 rises, and as it rises, the cam plate 27 also rises, so the operation is opposite to the case of the above-mentioned descent, and the tip 21' of the stop lever 21 comes off the piston ring and retreats to its original position. do.

Through this series of operations, the piston completes the spacer assembly.

As mentioned above, by repeating each operation such as lifting the piston with the lifter, raising and lowering the operating tube, and pushing down the pusher at a given timing using a sequential sequence circuit, the spacer and the piston can be assembled into the combined ring groove in a desired manner. I can do it.

When incorporating the spacer into the ring groove, the device of the present invention first inserts the open end of the spacer into the groove.
(Before insertion, the open ends are held apart.) Then, the opposite side of the open ends is inserted into the ring groove, so the open ends of the spacers can be prevented from intertwining with each other. It is securely inserted into the ring groove without rotating in the circumferential direction.

According to the present invention, the open end of the spacer contracts due to elastic deformation and is regulated between the bottom of the piston ring groove and the projection 8, and does not protrude out of the piston ring groove. Therefore, it is possible to prevent the open ends of the spacer from overlapping each other due to the spring effect of the spacer, thereby preventing assembly failure.

Note that when the spacers held in one magazine run out, the other magazine is rotated by the support shaft 2 and brought to the assembly position to continue the assembly work.

In this manner, the apparatus of the present invention achieves labor savings by automating the assembly of spacers.

As described above, the present invention is not limited to the configurations shown in the embodiments, and modifications are expected without departing from the technical idea of the present invention as described in the claims.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the device of the present invention, Fig. 2 is an elevational view thereof, Fig. 3 is a vertical sectional view of the main part of the device, and Fig. 4 is a sectional view of the magazine taken along the a-a section in Fig. 2. , FIG. 5 is a cross-sectional view of the leaf spring 20 shown in FIG. 4, and FIG.
The figure shows the holding state of the spacer held on the magazine, FIG. 7 shows the attached state of the leaf spring 6, FIG. 8 is a perspective view of the spacer S, and FIG. 9 is a structural explanatory diagram (perspective Fig. 10, Fig. 10-1, Fig. 11, Fig. 11-1, Fig. 12, Fig. 12-1 are explanatory diagrams (cross-sectional views) of the spacer assembly in the operating state;
FIG. 13 is a sectional view taken along line dd in FIG. 10-1, FIG. 14 is a sectional view taken along line ee in FIG. 10-1, and FIG.
16 is a side view of FIG. 15. In the figure, 1...a spacer holding magazine;
2... Magazine support shaft, 3... Piston, 3...
Piston lifter, 4...spacer pusher,
5...Operation tube for spacer assembly, S...Spacer,
15...base plate, 21...stop lever.

Claims (1)

[Claims] 1. Spacers are expanded and held in a layered manner around the outer periphery of a cylindrical magazine arranged approximately concentrically with the aperture on a base plate having a circular aperture, and the base plate is opened. When the operation tube having a small diameter section at the top rises to a predetermined position along the hole center line, one of the spacers at the bottom of the magazine is accommodated in the small diameter section of the operation tube, and then inside the operation tube. a piston having a spacer insertion groove is raised, and when the operating tube is lowered, the stop member rotates to insert its tip into the spacer insertion groove of the piston, and one side of the spacer is engaged with the first protrusion. In this state, insert the opposite open ends into the spacer insertion groove while guiding them by the widths of the second protrusion, and then release the engagement with the first protrusion by lowering the operating tube. A method for automatically assembling a spacer for a combined ring of a piston, the method comprising inserting a spacer into a spacer insertion groove of a piston. 2. A cylindrical magazine is stood upright on a base plate having a circular hole concentrically with the hole, a cylindrical operation tube that fits into the hole and moves up and down, and below the hole and the operation tube. a lifter for moving the piston up and down centripetally therewith; a pusher for pushing down the spacer held on the outer periphery of the magazine; a pusher for pushing down the spacer held on the outer periphery of the magazine; a stepped portion provided in each of the circular opening and the upper part of the operating tube; A first protrusion is provided at the upper part of the operation tube, and a second protrusion is provided at a position slightly higher than the first protrusion and opposite the first protrusion, and has a groove that penetrates in the radial direction in the center and has an appropriate width. and a stop member that is rotatable in a horizontal plane in conjunction with the vertical movement of the operating tube and has a tapered tip so as to be inserted into the groove of the piston through the groove of the second protrusion. Automatic spacer assembly device for piston combined rings.