JPS58206331A - Automatic piston ring inserting apparatus - Google Patents

Abstract

PURPOSE:To automatically insert a ring substantially having no engaging hole by supporting the guide jig having a circular cone which expands a piston ring, via the internal circumference, with the supporting cylinder located within the pressure cylinder and by pushing out the ring toward the piston with the pressure cylinder. CONSTITUTION:The cut-out plate 7 advances, the piston ring 8 is engaged over the hook 300 of guide jig 3, and when the cut-out plate 7 moves backward, the supporting cylinder 6 moves downward simultaneously and the lock hook 61 is engaged with the engaging groove 302 of jig 3. Thereafter, the pressure cylinder 4 moves downward, expanding the ring 8 along the cone part 32 of jig 3 and pushing the ring up to the piston ring groove 88 position of piston 89. Thereby the ring 8 is inserted into the ring groove 88.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically inserting a screw 1/ring 1, particularly a spacer expander of a combination oil ring, into a piston ring groove of a piston.

As is well known, a piston ring has a joint, and when it is inserted into a piston ring groove of a screw, it is inserted by opening this joint, and the automatic reel insertion device is no exception to this. The automatic piston ring insertion devices currently in use are the 16652 Japanese Patent Publication No. 36-16652 and the 16652 Japanese Publication No. 55
- There are many such as 51689, but basically, piston rings are sent out one by one from a magazine that stores piston rings in a stacked manner using a dehulling plate, and one piston ring is placed in a guide jig with a conical part that expands the piston ring. The piston is automatically inserted by supplying the ring, and then enlarging the piston ring along the guide jig with an indenter with the piston fitted in the guide jig (a7). In this conventional piston ring automatic insertion device, as shown in FIG. A protrusion 18 is provided on the plate 7. Therefore, the piston ring 8 is passed through the guide jig without being caught on the support plate 34, but in such a conventional piston ring automatic insertion device, the piston ring 8 is not substantially fitted. Piston rings without openings cannot pass through the support plate 34 and are not used at all.

This piston ring that does not have a substantial gap is, for example, a multi-wound piston ring that is wound twice or triple or more so that the gap does not cover the intake scavenge port for use in a two-stroke engine, or a single combination oil ring. and its spacer expander. In particular, spacer expanders have an extremely flexible structure, so there is a concern that the total number of tangles will overlap, so they are usually assembled by using a needle-like member called a slip joint across the joint. Also, although the combination oil ring usually consists of three pieces, for the purpose of reducing the lubricant consumption value, they are assembled with the joints shifted from each other, so that none of the piston rings has a configuration in which there is virtually no joint. It is something.

Japanese Patent Applications Nos. 57-60934 to 1982-60936 were previously proposed as such an automatic piston ring insertion device having substantially no gap, but the present invention has an even simpler structure and a method for inserting piston rings. An automatic insertion device is achieved that makes automatic insertion easier, and will be described in detail below.

First of all, the gist of the present invention resides in an automatic piston ring insertion device having the following seven constituent elements, as described in the claims.

■ Equipped with a cutting plate that feeds out piston rings one by one.

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

■ The guide jig has a conical part that expands the piston ring.

■ Equipped with a support cylinder that supports the guide jig from the inner circumferential side.

■ The support cylinder is placed inside the indenter cylinder.

■ Equipped with an indenter cylinder that pushes out the piston link locked on the guide jig toward the piston.

■ Equipped with a lifter that supports the guide jig from one side via a piston.

The present invention will be described in detail below with reference to Examples. FIG. 2 is a front sectional view of the first embodiment of the automatic piston ring insertion device of the present invention, showing a state in which automatic piston ring insertion is started.

First, the piston rings 8 are stacked and stored in the magazine 2, and the magazine 2 is removably attached to a magazine holder 20 that is fixed to a column attached to a cutout plate base 70, and the bottom surface 21 of the magazine 2 is It is lifted from the cutting board 7. At a position corresponding to the bottom surface 21 of the magazine 2, a cutout plate 7 having a cutout claw 71 at its tip corresponding to the shape of the piston ring into which the piston ring 8 is fitted is arranged, and the cutout plate 7 is guided to a cutout plate stand 70. Cylinder 17
It moves back and forth. Also, a guide jig 3 is attached to the tip of the cutting claw 71.
A notch 73 corresponding to the claw 300 is provided for the loss. The forward and backward movement of the cutting plate is adjusted by the stopper 79 and the like, with the cutting claw 71 setting the hemlock 9f 2 position as the backward limit and the guide jig 3 position being the forward limit.

Place the piston ring 8 into the piston ring groove 8 of the piston 89.
The means for inserting into 8 is provided with 1 guide jig 3, indenter cylinder 4, and piston lifter 9. 9 indenter cylinder 4 is attached to be movable up and down by cylinder 14, and has a space inside 1 in which guide jig 3 is fitted. 1) A space for fitting the support tube 6 is provided, an indenter pawl 42 for pressing the piston ring 8 is provided on the bottom surface, and a groove 40 corresponding to the support beam 62 of the support tube 6 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 the upper limit of the lift is adjusted by the stopper 95 so as to correspond to the piston fitting opening 39 of the guide jig 3. Further, a piston supply stand 28 and a take-out metal 27 are provided on both sides of the lifter 9, and the piston can only be inserted or removed by a piston supply/removal device (not shown). On the other hand, the lifter 9 is provided with a piston chuck claw 26 to fix the piston.

The guide jig 3 has a piston ring hook 300 on its upper surface, a piston fitting opening 39 on its lower surface, and a cylindrical portion 31 for guiding the piston ring and a cylindrical portion 31 for enlarging the piston ring on its outer peripheral surface. Conical part 32 and skirt part 33
A fitting hole 30 is formed on the inner circumferential surface of 1 to fit into the supporting cylinder 6.
A fitting groove 302 is formed to fit into the lock pawl 61 of the 1S support cylinder.

The support cylinder 6 is provided concentrically inside the indenter cylinder 4 and
It is attached to the base 1 via a support beam 62 that intersects with the support beam 62 and a cylinder 16 that supports the support beam 62 so as to be movable up and down. The outer periphery of the support cylinder 6 is formed to correspond to the fitting hole 301 of the guide jig 3, and a lock pawl 61 that is moved back and forth in the radial direction by a cylinder 161 is provided inside. Further, the amount of vertical movement of the support tube 6 is adjusted by a stopper 65 so that the lower limit is a predetermined height of the guide jig 3.

The guide jig 3, the lifter 91, the indenter cylinder 4S, the support cylinder 6, and the cutting claws 71 can be replaced according to the shape of the piston ring, and the amount of movement of each can be changed by adjusting the stopper position. Enabled for insertion.

Next, the operation of the automatic piston ring insertion device of the present invention will be explained with reference to FIGS. 2 to 6.

First, as shown in FIG. 2, the guide jig 3 is supported from below by the lifter 9 via the piston 89.
As shown in the figure, the cutting plate 7 moves forward and the piston ring 8 is hooked onto the hook 300 of the guide jig 3.

Next, as shown in FIG. 4, the cutting plate 7 retreats, and at the same time the support tube 6 descends due to the actuation of the cylinder, and at the same time as it is fitted into the guide jig 3, the cylinder 161 is actuated and the lock pawl 61 moves forward. It is engaged with the fitting groove 302 of the guide jig 3.

'Next, as shown in FIG. 6, the indenter cylinder 4 descends and expands the piston ring 8 along the conical part 32 of the guide jig 3).
Push it to position 8 (#) 9) The piston ring has been inserted into the piston ring groove.

Next, as shown in FIG. 6, the lifter 9 is lowered to set the piston 89 at a predetermined position, and the piston is replaced by a piston supply/removal device (not shown).

Next, the lifter is moved upward again to fit the piston into the piston fitting opening of the guide jig, and the indenter cylinder and support cylinder are raised to return to the state shown in Fig. 2, and automatic insertion of the next piston ring is started.

According to the first embodiment of the present invention, even a spacer expander or a multi-wound piston ring in which the abutment of the piston ring 8 is closed by a slip joint or the like can be automatically inserted into the piston ring groove.

Furthermore, in the present invention, when the indenter cylinder 4 descends, the guide device 3 is supported from above and below by the support cylinder 6 and the lifter 9, so that the supporting effect is excellent.
For items such as spacer expanders that require a small press-fitting load, the supporting cylinder does not need to be lowered to support the guide jig in FIGS. 4, 5, and 5.

Further, in the first embodiment, a lock pawl was provided in the support cylinder, and the ten lock pawls were provided to support the guide jig 3 when the lifter 9 of the piston 89 is lowered as shown in FIG.
The present invention can be achieved as long as the mechanism has the effect of supporting the guide jig. (1) The support tube and the guide jig are formed to engage in a threaded manner. An embodiment in which it is expanded and locked with a guide jig may also be implemented.

Furthermore, regarding the shape of the lock pawl, it is preferable that the tip thereof be cone-shaped in order to facilitate position control with the guide jig, and furthermore, as shown in FIG. 7, the joint surface with the guide jig 3 should be a tapered surface 63. The support tube 6 is attached to the guide jig 3.
can be easily aligned.

Furthermore, in the present invention, the guide jig has a structure in which it is supported by the piston fitting opening and the support part fitting hole, that is, it is supported only from the inner circumferential surface side, so there is no need for a cutout groove on the outer circumferential surface. Since the piston ring is formed with a perfect circular cross section, there is a strong possibility that the piston ring will hang on the outer periphery of the guide jig, and the piston ring can be inserted very easily.

Furthermore, by arranging the position of the support beam 62 of the support cylinder 6 above the position of the indenter claw 42 of the indenter cylinder 4 as shown in FIG.
It is possible to form the indenter pawl 42 into a closed annular shape, and it is possible to press the piston ring uniformly.

The present invention can be achieved by disposing the support cylinder concentrically inside the indenter cylinder; 1. Such a structure is as shown in FIG. cylinder 16
The mounting claw 61 is configured to be actuated by a piston 68, and the indenter cylinder 4 may be formed into a cylindrical shape surrounding the support cylinder 6. In this embodiment, it is not necessary to provide a cutout such as a groove in the indenter cylinder 4, so that the strength of the first ratio plate can be improved and the first cylindrical structure can be simplified.

Regarding the indenter mold provided in the indenter cylinder 4 in the present invention,
Although the bottom surface of the indenter cylinder may be used as an indenter type, it is preferable to provide a split type indenter claw as shown in FIG. 9 in order to more stably press the piston ring. That is, the indenter cylinder 4
A plurality of indenter molds 42, 42, . In the indenter die 42 having such a structure, since the indenter die 42 also expands as the piston ring expands, slipping or tangling with the piston ring is prevented.

The present invention has been described above, but the present invention has a support cylinder that supports a guide jig, so that it can be used in a spacer expander having a slip joint, a multi-wound piston ring, or a combination oil ring, which can substantially close the joint. It is possible to automatically insert a piston ring into the piston ring groove, and even if the above-mentioned embodiments are combined, it is possible to automatically insert piston rings into the piston ring groove. It goes without saying that it can be used even if the cutting device is a clamp type, and it can also be used for a normal piston ring having an abutment.

[Brief explanation of drawings]

Figure 1: A sectional plan view of a conventional automatic piston ring insertion device. Figure 2: A sectional front view of the first embodiment of the present invention. Figures 3 to 6: Main parts showing an operational example of the automatic piston ring insertion device of the present invention. Cross-sectional views Figures 7 to 9: Cross-sectional views of other embodiments of the present invention Base 2: Magazine 3: Guide jig 3o2: Fitting groove 4: Indenter cylinder
42: Indenter mold 6: Support cylinder 61: Ronok claw 7: Cutting plate
71: Cutting claw 8: Piston ring 89:
Viston 88: Piston ring groove 9: Lifter Applicant: Japan Piston Ring Co., Ltd. Figure 1 Figure 5 Figure 6 Figure 7 Figure 6 Figure 8

Claims (3)

[Claims] (1) A cut-out plate that feeds out the piston rings one by one, a guide jig that guides the outer circumference of the piston rings that are fed out from the cut-out plate, and guides the conical part that expands the ring; An automatic ring insertion device (a support can that supports the guide jig from the inner circumferential surface in 1') is inserted into the indenter cylinder marked 11IJ. An automatic piston ring insertion device comprising a lifter for supporting the guide jig from a lower knob through a piston. (2) The automatic insertion device is characterized in that the support cylinder is provided with a locking pawl that engages with the guide jig and is movable in the radial direction. (3) The piston according to 4.1+claim 1, characterized in that the tip of the indenter cylinder is provided with a plurality of circular arc-shaped indenter claws whose back surface is elastically supported. Ring automatic insertion device.