JPS58206330A - Automatic piston ring inserting apparatus - Google Patents

Abstract

PURPOSE:To automatically insert a piston ring into the piston ring groove by supporting a guide jig from both internal and external circumferences with a supporting hook and a supporting cylinder and by pushing a piston ring toward the piston with the pressure cylinder. CONSTITUTION:A guide jig 3 supported by supporting hook 5 and supporting cylinder 6 is provided with a hook 300 of piston ring at the upper surface while a cylinder 31 which guides the piston ring and an externally tapered circular cone part 32 at the external circumference. The piston ring 8 is sent toward the guide jig 3 by moving forward a cut-out plate 7 and it is hung on the latching hook 300. Next, when the cut-out plate 7 is moved backward, the ring 8 hung on the latching hook 300 is then hung on the supporting hook 5, the supporting cylinder 6 advances toward the engaging hole 301 of jig 3, the lifter 9 ascends, engaging the piston 89 with the piston engaging hole 39 of jig 3. Thereafter, the pressure cylinder 4 moves downward, the ring 8 is externally tapered along the circular cone part 32 and thereby it is inserted into the ring groove 88.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically inserting a piston ring, particularly a spacer expander of a combination oil ring, into a piston ring groove of a piston.) The piston ring has a joint as is well known. In order to insert the piston into the piston ring groove of the piston, the fitting [ ] is opened and the automatic insertion device is no exception to this. The automatic piston ring insertion device currently in use is the Japanese Patent Publication No. 36-16652. Tokuko Showa 5
There are many types including 5-51689, but basically, as shown in FIG. It is composed of a guide jig 3 that guides and expands the piston ring, an indenter cylinder 4 that pushes out the piston ring, and a lid 9 that raises and lowers the piston 89. The operation is such that the piston rings are fed one by one from the magazine 2 to the guide jig 3 by the cutting plate 7, and the piston rings fitted in the guide jig 3 are transferred to the indenter tube 4.
With the descent of 1), the ring is expanded at the conical part 32 of the guide jig 3.
The piston ring is inserted by being pushed in advance by the IJ softer to the position of the piston ring groove 88 of the piston 89 fitted in the piston fitting [139] of the guide jig 3. Furthermore, the cutting handle 7 is fixed to the cylinder 17, the indenter cylinder 4 to the cylinder 14, and the piston 89 to the cylinder 18 so as to be movable in one direction, while the guide jig 3 is fixed to the base 1 by the support plate 34. J
It's convenient). This support plate 34 corresponds to the abutment 80 of the piston ring 8 as shown in FIG.
Since the cutting plate 7 is provided with a protrusion 78 for supporting the abutment, the piston ring abutment 80 can pass through without being caught by the guide jig 3.

However, as shown in FIG. 3, the spacer expander 8 of the piston ring combination oil ring is formed into a corrugated shape 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. Due to the wavy shape, the abutments 80 overlap during assembly as shown in FIG. 5, and the piston ring itself tends to warp during transportation. On the other hand, as shown in FIG. 6, a needle-like member called a slip joint 81 is combined to form
Even if 0 is open, it will be a slip join) 81 will fit []
80 is guided, and tangling and overlapping of the joints 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 is applicable to a piston ring having a slip joint as described above, a multi-wrap piston ring, a multi-wrap piston ring, and a combination oil ring as shown in FIG. The purpose of the present invention is to obtain an automatic piston ring insertion device that can be applied to piston rings that do not have a mouth.
No. 60934, Japanese Patent Application No. 1983 60936M has been further improved2, and the automatic piston ring insertion accuracy has also been improved.The gist thereof is the following five points as stated in the claims. This is an automatic piston ring insertion device consisting of various configurations.

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

■ Equipped with a guide jig equipped with a conical part that guides the sent-out piston ring to its outer circumferential surface and expands the piston ring.■ Equipped with an indenter cylinder that pushes out the piston ring locked in the guide jig toward the piston. Be prepared.

■ A support mold is provided to support the guide jig from the outer peripheral surface.0 ■ A support cylinder is provided within the indenter cylinder to support the guide jig from the inner peripheral surface.

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

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 fixed to a column attached to a cutout plate base 70. A cutout plate 7 is disposed at a position corresponding to the bottom surface 21 of the 0 magazine 2 which is floated further, and the cutout plate 7 has a cutout claw 71 at its tip corresponding to the shape of the piston ring into which the piston ring 8 is fitted.
The cutout plate 7 is guided by the cutout plate stand 70 and the cylinder 17
It moves back and forth. The cutting plate 7 moves back and forth using the cutting claw 7.
1 is adjusted by a stopper 79 or the like with the magazine 2 position as the backward limit and the guide jig 3 position as the forward limit.

Place the piston ring 8 into the piston ring groove 8 of the piston 89.
A guide jig 3, an indenter cylinder 4, and a piston cover 9 are provided as the means for inserting into the indenter 8. The lifter 9 has a piston 89
A chuck claw 26 is provided, and a piston supply table 28 and a take-out table 2'7 are provided at the front and rear of the lifter 9.
, The piston is removed by the B (not shown) supply and take-out device. 42+f of the father lifter 9
5, the piston fitting of the guide jig 3 [139 is controlled by φ(
1.

The receiving claw 5 that supports the guide jig 3 from the outer circumferential side is the cylinder 1.
5 guides the base 1 to move forward and backward, and is controlled by a stopper 55 to the guide jig position.Furthermore, the tip 51 of the receiving claw 5 is formed so as to fit into the groove 35 of the guide jig 3.

On the other hand, a support cylinder 6 that supports the guide jig 3 from the inner peripheral side is disposed inside the indenter cylinder 4, and the support cylinder 6 is supported from the outside of the indenter cylinder 4 by a support beam 62. The support beam 62 is supported reciprocally by the cylinder 16 and the guide column, and is supported by a stopper 65.
The lowered position is adjusted to a predetermined position of the guide jig 3. Also, a lock pawl 61 that fits into a fitting groove 302 provided on the inner circumferential fitting hole 301 surface of the guide jig 3 is incorporated in the support tube 6, and the lock pawl 61 is attached to the cylinder 16 attached to the support tube 6.
1, it reciprocates in the radial direction.

The guide jig 3 is supported by the receiving claw 5 and the supporting cylinder 6.
is provided with a claw 300 on its upper surface for hooking the piston ring, and has a cylindrical portion 31 on its outer peripheral surface for guiding the piston ring. An expanding conical portion 32 and a skirt portion 33 are formed, and the above-mentioned fitting groove 35 of the receiving claw 5 and fitting hole 30 of the supporting cylinder 6 are formed.
1. The lock pawl fitting groove 302 and the piston 8 on the bottom surface
Nine fitting openings 39 are provided.

An embodiment of the operation of the automatic piston ring insertion device of the present invention will be described with reference to FIGS. 8 to 15.

First, from the state shown in FIG. 8, the cutting plate 7 is advanced to send out the piston ring 8 in the direction of the guide jig 3 as shown in FIG.

Next, as shown in FIG. 10, the piston ring 8 is hooked onto the hook 300 of the guide jig. At this time, as shown in FIG. 8, a groove 73 corresponding to the hook 300 is provided at the tip of the cut-out claw 71, thereby preventing contact between the cut-out claw 71 and the hook 300.

Next, when the cut-out plate 7 is retreated, the piston ring 8, which has been hooked to the hook 300+'C, is hooked to the position of the support hook 5, as shown in FIG.

Next, as shown in FIG.
1 moves forward and supports the guide jig from the inner peripheral surface side of the 1 east inner jig 3.

Next, as shown in FIG. 13, the receiving pawl 5 retreats, and the piston ring falls at the conical portion 32''I! of the guide jig 3.

Next, as shown in FIG. 14, the receiving claw 5 advances again to support the guide jig 3, and the lifter 9 rises to fit the piston 89 into the piston fitting opening 39 of the guide jig 3.

Next, as shown in FIG. 15, the indenter cylinder 4 descends to expand the piston ring 8 along the conical part 32, and sends it through the skirt part 33 to the piston ring groove position of the piston 89. It is inserted into the groove.

Next, the lifter 9 is lowered and the indenter cylinder 4 is raised to -, and the lock pawl 61 of the support cylinder 6 is moved back and the support cylinder 6 is raised to return to the state shown in Fig. 8, and the next piston ring is automatically moved. Insertion begins and automatic insertion of successive piston rings occurs.

According to the first embodiment of the present invention, even a bisto cylinder in which the piston ring 8 is substantially closed can be automatically inserted into the piston ring groove.Other embodiments will be described below.

First, in the first embodiment shown in FIG. 8, the receiving claw and the locking claw each have two pieces, but the receiving claw and the locking claw each not only support the guide jig, but also support the indenter cylinder, piston, etc. Since the position of the guide jig with respect to the cutting plate and the support tube is controlled, it is possible to improve the supporting accuracy of the guide jig by using a plurality of guide jig members, such as three or four or more.

Further, the present invention can be achieved if the guide jig is supported by either the receiving claw or the supporting cylinder, and even in the operating order of the embodiment, the receiving claw 5 is at the retracting limit after Fig. 14. Then, the guide jig 3 is supported only by the support cylinder 6, and after the piston ring insertion is completed, the indenter cylinder is raised, and then the receiving claw is advanced to support the guide jig, and the support cylinder is raised twice. It is also possible to return to the state shown in FIG. According to this embodiment, since the indenter cylinder is operated without interlocking with the receiving claw,
At least at the tip of the indenter cylinder, there is no need to provide a groove that pairs with the receiving claw 1j. Furthermore, if the support beam 61 of the support cylinder 6 is arranged on the opposite side of the guide jig 3 from the bottom surface 41 of the indenter cylinder 4 as shown in FIG. Since it is operated without interlocking with the support beam 61, a corresponding groove is not required on the bottom surface 41 of the indenter cylinder, and a more stable effect is achieved in press-fitting the piston ring.
- As for the indenter mold attached to the indenter cylinder, it is possible to use the bottom surface 41 of the indenter cylinder 4 as an indenter mold as shown in the conventional example shown in FIG.
Since it is necessary to provide a large number of grooves 40 and a large number of grooves 38 that fit into the guide jig 3, which may cause concerns about the strength of the indenter cylinder 4 and the guide jig 3, it is preferable to use a circular arc shape as shown in FIG. A plurality of indenter molds 42 are provided. The indenter mold 42 is rotatably connected to the indenter cylinder 4 by a pin 43 and is pushed inward by a spring 45. The state shown in FIG. 16 shows a state in which the indenter die 42 is closed, and the outer diameter of the cylindrical portion of the guide jig approximately coincides with the outer diameter. 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. 17, it is preferable to provide the stepped portion 44 on the inner peripheral side so as not to overlap the spacer expander protrusion 82 in FIG. 5.

Although the automatic piston ring insertion device in which the piston is located downward and the piston ring is attached to the guide jig mainly by its own weight has been described above, the present invention can also be applied to an automatic piston ring insertion device in which the piston is placed upward or sideways. Can be applied.

That is, as shown in FIG.
In the type that is supported by a lifter 9 having By providing a hook (not shown) on the upper surface of the support cylinder 6, the piston ring is hung on the support cylinder 6 as the cutting plate 7 moves back and forth, and is supplied to the position of the indenter claw 42 of the indenter cylinder 4. . Next, the cylinder 16 pushes the support cylinder 6 up to the guide jig 3 and locks the lock claw 6.
1, the guide jig 3 and the support tube 6 are fastened together. At this time, as shown in FIG. 18, by making the shape of the support tube 6 conical, the accuracy of the fit between the guide jig and the support tube is increased, and
This prevents the piston ring from hanging in the middle of the support cylinder.

Next, the lifter 9 is lowered and the piston 89 is fitted into the fitting opening 39 of the guide jig 3 to support the guide jig 3 from above and below. Next, by retracting the receiving claw 5 and raising the indenter cylinder 4, the piston ring is inserted into the piston ring groove.

At this time, the receiving claw 5 is advanced after the indenter cylinder 4 has passed the position of the supporting claw 5, so as to support the guide jig when the piston ring is press-fitted (i.e., when the piston ring passes through the conical part of the guide jig). Also, as shown in the embodiment in FIG. 18, the support tube 6 is operated by a cylinder arranged concentrically with the indenter tube 4 and movably supports the support tube and the indenter tube, respectively. A support cylinder having support beams as shown in the embodiment in FIG. 8 may also be used. Furthermore, in the embodiment shown in FIG. 18, since the guide jig is supported from above and below by the piston and the support cylinder, there is no need to provide a lock pawl on the support cylinder.

In all of the embodiments described above, the support tube moves relative to the guide jig, but the present invention is achieved by fitting and disconnecting the support tube and the guide jig by relative movement. Therefore, for example, the support tube may be fixed and the support tube supporting the guide jig may be assembled so as to be movable toward the support portion.

Although the present invention has been described above, the present invention has a structure in which the guide jig is supported from both the inner and outer circumferential sides by the support wind and the support cylinder, so it is possible to use a spacer expander with a slip joint, a multi-wound piston ring, or a combination of oil and gas. This device is capable of automatically inserting a piston ring with a closed joint such as a ring into a piston ring groove, and the device is capable of automatically inserting a piston ring with a closed abutment into a piston ring groove. It goes without saying that it can also be used as a piston ring or a piston ring whose operation is performed mechanically rather than by a cylinder.

[Brief explanation of drawings]

FIG. 1: A sectional view of a conventional piston ring automatic insertion device. FIG. 2; first open plane sectional view. FIG. 3: A plan view of the spacer expander. FIG. 4: A sectional view showing how the spacer expander is used. FIG. 5 and FIG. 6; A plan view of the main part of a conventional spacer expander. FIG. 7: A perspective view of a conventional multi-wound piston ring. FIG. 8; sectional view of the first embodiment of the automatic piston ring insertion device of the present invention. FIGS. 9 to 15 are cross-sectional views of essential parts for explaining the operation of the automatic piston ring insertion device of the present invention. FIGS. 16 to 18; sectional views showing other embodiments of the present invention. Explanation of number ■, Base 2. Magazine 3, guide jig 329 conical part 35, fitting groove 39. Fitting port 4, indenter cylinder 42. Indenter claw 5, first support claw 6. Support cylinder 7, cutout plate 8. Piston ring 89, piston 9. Lifter Patent Applicant Nippon Piston Ring Co., Ltd. Figure 1 Figure 2 Figure 9 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 2 ゛44

Claims (1)

[Scope of Claims] (1) A guide jig comprising a cut-out plate that feeds out piston rings one by one, and a conical part that guides the piston rings fed out from the cut-out plate to the outer peripheral surface of the cut-out plate and expands the piston ring. A piston ring automatic insertion device comprising a tool and an indenter cylinder for pushing out a piston ring locked on the guide jig toward the piston, the apparatus comprising a receiving claw for supporting the guide jig from an outer circumferential side, and the indenter cylinder. An automatic piston ring insertion device, comprising a support cylinder for supporting the guide jig from the inner circumferential side. (2) The automatic piston ring insertion device according to claim 1, characterized in that the support cylinder is provided with a lock claw for fastening the inner peripheral surface of the guide jig. (3) The support cylinder is characterized in that a support beam for supporting the support C,) is provided at a position opposite to the guide position from the bottom surface of the indenter cylinder, and the support beam is movably assembled to the base. The automatic piston ring insertion device according to claim 1. (4) The piston ring automatic according to claim 1, characterized in that the support tube and the indenter tube are arranged concentrically, and the piston ring is provided with a cylinder that movably supports the support tube and the indenter tube, respectively. Insertion device. (5) The screw according to claim 1, wherein the tip of the indenter cylinder is provided with an indenter claw constituted by a plurality of split cylinders elastically supported so as to be ring-expandable. , J.
/ IJ song dynamic insertion device.