JPS58181526A - Automatic inserter for piston ring - Google Patents

Abstract

PURPOSE:To make a spacer expander and the like having a slip joint insertable into a ring groove in an automated manner, by installing a supporting claw supporting a guide jig. CONSTITUTION:A guide jig 3 guiding and expanding a piston ring 8 fed out by a cutting plate 7 has a cylindrical part 31 guiding the piston ring 8 and also a conical part 32 expanding the piston ring 8. In addition, it has each of supporting claws 5 supporting the guide jig at the circumferential line position of the guide jig 3 from the peripheral side. Then, a lifter 9 supporting a pressure cylinder which pushes out the piston ring 8 in a direction toward a piston, and the guide jig 3 from underside via a piston 89 is installed. Therefore, a spacer expander having a slip joint and a multi-winding piston ring as well as even such a piston ring whose fitting notch is closed are all made insertable into a piston- ring groove in an automated manner.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically inserting a spacer expander of a piston ring, particularly a combination oil ring, into a piston ring groove of a piston.

As is well known, a piston ring has an abutment, and in order to insert it into a piston ring groove of a piston, the abutment is opened and the automatic insertion device is no exception to this. The automatic piston ring insertion devices that are currently in use are 16652-16652 and 16652-1983.
There are many such as No. 51689, but basically, as shown in Fig. 1, there is a magazine 2 that stores the piston rings 8 in a stack, a cutout plate 7 that feeds the piston rings 8, and a guide jig that guides and expands the piston rings. 3) It is composed of an indenter cylinder 4 for pushing out the piston ring, a lid 9 for raising and lowering the piston 89. Its operation is carried out by cutting out the magazine 2 from the cutting plate 7.
The piston rings are sent out one by one to the guide jig 3, and the piston rings fitted in the first guide jig 3 are expanded at the conical portion 32 of the guide jig 3 as the indenter cylinder 4 descends.
The piston fitting opening 39 of the guide jig 3 is inserted in advance by the IJ lid 9.
The piston ring is inserted by pushing the piston 89 fitted into the piston ring groove 88 into the piston ring groove 88 position. Furthermore, the cutting plate 7 is attached to the cylinder 17,
The indenter tube 4 is attached to the cylinder 14, and the piston 89 is attached to the cylinder 1.
The guide jig 3 is fixed to the base 1 by a support plate 34 for use. This support plate 34 corresponds to the abutment 80 of the piston ring 8 as shown in FIG. It will be passed without the jin that hangs over 3.

However, as shown in Fig. 3, the spacer expander of the combined oil ring for piston rings has a corrugated structure in the radial or axial direction and has an extremely flexible structure, but at the same time, it is extremely difficult to assemble into the piston. . This spacer expander is used by combining two sight rails 87 as shown in FIG. Because of the wavy shape, the abutments 80 overlap during assembly as shown in FIG. 5, and the piston rings themselves tend to become tangled during transportation. On the other hand, as shown in Fig. 6, if a needle-like part called a slip joint 81 is combined, even if the joint 80 opens, the slip joint 81 will guide the joint 80). can be prevented.

However, in a piston ring such as a spacer expander having a slip joint, a multi-wound piston ring 8 as shown in FIG. 7, or a combination oil ring as shown in FIG. 4, the ring of the piston ring is closed. Therefore, the piston ring 8 cannot pass through the guide jig 3 having the support plate 34 as shown in FIG.

The present invention provides an automatic piston ring insertion device which can be applied to a piston ring having a slip joint as described above or a single multi-turn piston ring. 6
The automatic piston ring insertion device consists of two structural elements.

■ It has a cutting plate that feeds out the piston rings one by one.

■ It has a guide jig that guides and expands the piston ring sent out with a cutting plate.

■ The guide jig has a cylindrical part that guides the piston ring and a conical part that enlarges the piston ring.

■ It has a support claw that supports the guide jig from the outer circumferential side at the circumferential line position of the guide jig.

■ It has an indenter cylinder that pushes out the piston ring that is locked on the guide jig toward the piston.

■ It has a lifter that supports the guide jig from below via a piston.

The present invention will be described in detail below with reference to Examples. FIG. 8 is a front sectional view of a first embodiment of the automatic piston ring insertion device of the present invention, and FIG. 9 is a perspective view of the first embodiment.

The piston rings 8 are stacked and stored in a magazine z, and the magazine 2 is removably attached to a magazine holder 20 fixed to a column attached to a cutout plate base 70, and the bottom surface 21 of the magazine 2 is The cutout plate 7 is lifted further. At a position corresponding to the bottom surface 21 of the magazine 2, a cutting plate 7 having a cutting claw 71 at its tip corresponding to the piston ring shape into which the piston ring 8 is fitted is arranged, and the cutting plate 7 is guided to a cutting plate stand 70. It is reciprocated by the cylinder 17. Further, a notch 73 corresponding to the hook 300 of the guide jig 3 is provided at the tip of the cutting claw 71. To move the cutting plate 7 back and forth, the cutting claw 71 sets the hemlock 2 position as the backward limit, sets the guide jig 3 position as the forward limit, and moves the piston ring 8 adjusted by the stopper 79 or the like into the piston ring groove 88 of the piston 89. The insertion means includes a) a guide jig 3 and an indenter cylinder 4) a piston cover 9, and the indenter cylinder 4 is attached to be movable up and down by a cylinder 14, and has a space inside to fit the guide jig 3 and a bottom surface. 41 has piston ring 8
An indenter pawl 42 for pressing the guide jig 3 is provided, and a groove 40 corresponding to the support die 5 of the guide jig 3 is provided on the side surface. The lifter 9 of the piston 89 is supported by the cylinder 18 so as to be movable up and down, and its upper limit is adjusted to the piston fitting opening 39 of the guide jig 3. Further, on both sides of the lifter 9, a piston supply table 28 and a piston take-out table 27 are connected to each other for supply and removal of the piston, and the piston is fixed to the lifter with a chuck 26. The guide jig 3 has a piston ring hook 300 on the opposite side of the top surface 30 from the cutout plate 7, and has a piston fitting opening 39 on the bottom side. Further, on the outer periphery, there is a cylindrical portion 311 on the upper side, and a conical portion 3 on the inner shaft.
2. A skirt portion 33 is provided on the lower side, and functions in the following order: 1 to engage and stop the piston ring, and 1 to guide for ring expansion.

Further, the guide jig 3 is supported by a support die 5 supported on the base 1, and a groove 35 for fitting with the first support pawl 5 is provided in the cylindrical portion 31. There are two supporting molds 6 on the left and right sides of the outer circumference of the guide jig 3, so they are each supported and guided by the base 1 and reciprocated by the cylinder II).The tip of the supporting mold 5 fits into the fitting groove 35 of the guide jig 3. The positioning of the guide jig is also performed at the same time, and the reciprocating position is controlled by the stopper 55.

These indenter cylinder 41 guide jig 3\piston lift 9 are each replaceable and can correspond to automatic insertion of piston rings into various types of pistons.

Next, the operation of the automatic piston ring insertion device of the present invention will be explained with reference to FIGS. 10 to 14. First, the piston rings are cut out one by one from the magazine 2 (as shown in FIG. 9) by the cutting plate 7 and sent onto the guide jig 3. At this time, the lower surface of the cutting plate 7 and the upper surface of the guide jig 3 are at the same height, and when the piston ring 8 is at the forward limit, the piston ring 8 is hooked onto the hook 300. Then the first
As shown in the θ diagram, the cutout plate 7 is retreated, but the damage is caused by the claw 30.
The piston ring 8 hung on the 0 remains on the guide jig 3. After the cutting plate 7 has retreated, the piston 89 is raised by the lifter 9 as shown in FIG. 11) and is fitted into the fitting opening 39 of the guide jig 3 to hold the guide jig 3. Then the 12th
As shown in the figure, the support mold 5 retreats and the first piston ring 8 falls to the guide jig conical portion 32. Next, as shown in FIG. 13, the support mold 6 is advanced and the guide jig 3 is supported by the support mold 5 again.

Next, as shown in FIG. 14, the indenter cylinder 4 is lowered and the piston ring 8 is pressed by the indenter claw 42 provided at the tip of the indenter cylinder 4). Push out the piston ring 8 to the screw I/ring groove 88 position to complete the insertion of the piston ring 8 into the piston ring groove.

From this state shown in FIG. 14, the lifter 9 is lowered again and the indenter cylinder 4 is
By raising the piston, the piston ring is returned to state j7 in FIG. 8, and insertion of the piston ring into the primary piston is started.

According to the first embodiment of the present invention, the piston ring 8
Even a spacer expander or a multi-wound millet ring whose abutment is closed by a slip joint or the like can be automatically inserted into the piston ring groove, and other embodiments are shown below.

First of all, in the first embodiment shown in Fig. 8, a model equipped with two support types is shown, but the A support type not only supports the guide jig but also supports one support type.
Since the position of the guide jig is controlled with respect to the indenter cylinder and the piston A cutting plate, the supporting precision of the guide jig can be increased by configuring a plurality of three or more supporting types. It is possible.

Regarding the indenter claw attached to the indenter cylinder, it is possible to use the bottom surface 41 of the indenter cylinder 4 as the indenter claw, as shown in the conventional example shown in FIG. 40 and the guide jig 3 also have a large number of grooves 3 that fit therewith.
Since the indenter tube 4 and the guide jig 3 must be provided with a plurality of indenter claws 8, the strength of the indenter cylinder 4 and guide jig 3 may be unstable. Therefore, preferably, a plurality of arcuate indenter claws 4z as shown in FIG. 15 are provided. The indenter claw 4z is rotatably fed to the indenter cylinder 4 by a pin 43, and is pushed inward by a spring 45. The state shown in FIG. 15 shows the state in which the indenter die 42 is closed), which substantially matches the inner diameter of the cylindrical portion of the guide jig. When the indenter mold opens from this state, it matches the outer diameter of the skirt portion of the guide jig and presses the piston ring. When applied to a spacer expander, as shown in FIG. 16, it is preferable to provide the stepped portion 44 on the inner circumferential side so as not to overlap the spacer expander protrusion 82 of FIG. 5.

Furthermore, by supporting the hook 300 of the guide jig 3 with a spring 301 (as shown in FIG. 17), damage to the cut-out plate or the guide jig due to incorrect assembly with the cut-out plate 1 can be prevented.

Furthermore, in the present invention, since the guide jig is supported by the support mold, it is preferable to fit the guide jig 3 as shown in FIG. 8, but as shown in FIG. By providing a cone portion 52 in the guide jig 3 and providing a corresponding cone hole in the guide jig 3, the position adjustment accuracy of the guide jig 3 is improved, and by making the top surface 63 of the tip of the first supporting claw 6 a tapered surface. The piston ring is prevented from hanging on the support mold when the support mold is retracted.

In order to explain the present invention, the present invention has a support mold that supports a guide jig, and thereby allows the site rail and spacer to be expanded in advance using a spacer expander having a slip joint, a single multi-wound piston ring, or a low melting point adhesive. This device is capable of automatically inserting a piston ring with a closed abutment into a piston ring groove, such as a piston ring temporarily assembled with an expander. It goes without saying that it can be used not only in devices other than mechanisms, such as those in which the cutting device rotates, but in which the operation is performed mechanically without using a cylinder, and also in piston rings with round openings. .

In the case of a piston ring having an abutment which requires special control of the abutment position during insertion, for example, as shown in FIG. 19, a guide jig 3 is provided with an abutment guide protrusion 37.

[Brief explanation of the drawing]

FIG. 1: A sectional view of a conventional piston ring automatic insertion device. Figure 2: Cross-sectional view of the first factor plane. FIG. 3 is a plan view of the Ni spacer expander. FIG. 4 is a sectional view showing how the Ni spacer expander is used. FIG. 6 and FIG. 6: A plan view of a conventional spacer expander section. Figure 7: A perspective view of a conventional multi-wound piston ring. FIG. 8: A sectional view of the first embodiment of the automatic piston ring insertion device of the present invention. Figure 9: A perspective view showing the main parts of the first embodiment of Figure 8. FIGS. 10 to 14: Cross-sectional views of essential parts for explaining the operation of the automatic piston ring insertion device of the present invention. FIGS. 10 to 14 are cross-sectional views showing other embodiments of the present invention. FIGS. 18 and 19 are perspective views showing other embodiments of the present invention. Explanation of amount applied 1. Base 2. Magazine 3, guide jig 329 conical part 35, fitting groove 39. Fitting port 4, indenter cylinder 42. Indenter type 5, support type 7. Cutout plate 8, piston ring 89. Piston 9, lifter Patent applicant Nippon Piston Ring Co., Ltd. Figure 6 Figure 7 Figure 6 Figure 18 Figure 19

Claims (4)

[Claims] (1) A guide jig comprising a cutout plate that feeds out piston rings one by one, a cylindrical part that guides the piston rings fed out from the cutout plate to its outer peripheral surface, and a conical part that enlarges the piston ring; In an automatic piston ring insertion device equipped with an indenter cylinder that pushes out a piston ring locked on the guide jig toward the piston, the apparatus further comprises: 1 a support mold that supports the guide jig from its outer peripheral surface and is movable in a radial direction; 1. An automatic piston ring insertion device comprising: a lifter that supports the guide jig from below via a piston. (2) The indenter cylinder is provided with a groove that fits into the support mold, and the indenter cylinder is provided below the indenter cylinder with an indenter mold consisting of a plurality of arcuate claws rotatably supported at one end. Patented automatic piston ring insertion device. (3) A piston ring automatic according to claim 1, characterized in that a cone-shaped protrusion is provided at the tip of the support mold, and a hole corresponding to the cone-shaped protrusion is provided in the guide jig. Insertion device. (4) The automatic piston ring insertion device according to claim 1, wherein the upper surface of the tip end of the support mold is a tapered surface.