JPH0453859Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention is designed to set at least two types of piston rings, which are assembled around the outer periphery of a piston in an engine assembly line, into a ring expansion machine, from each storage case. This invention relates to a device for removing piston rings.

<Prior Art> When assembling at least two types of piston rings to one piston, each ring has a predetermined assembly position relative to the piston, so each piston ring is set in a ring expander in a predetermined order. There must be.

Therefore, as a conventional method for taking out piston rings, the worker holds the piston in his left hand, takes out the first piston ring from the storage case with the remaining fingers of his right hand, and then, while still holding the previous piston ring with the same right hand. Remove another piston ring from its storage case. As a result, two types of piston rings are held concentrically and superimposed on the fingertips of the right hand. Therefore, both piston rings are set in the ring expander, taking care that their notches (the piston rings are C-shaped) both face downward.

After this, operate the ring expander to expand the diameter of each piston ring, set the above piston there, and then operate the piston ring expander to reduce the diameter of each piston ring to its original state. Then, each piston ring is assembled to the outer periphery of the piston.

As a technique related to this type of piston ring assembly, for example, Japanese Patent Laid-Open No. 18316/1983 discloses an apparatus for feeding piston rings to their assembly position. Also, JP-A-57-
Publication No. 41148 describes how to clamp, transfer, and
An autopilot device has been disclosed that automatically performs tasks related to loading and unloading.

<Problems to be solved by the invention> As with the above-mentioned piston ring extraction means, it is a heavy burden on the operator to extract at least two types of piston rings in a predetermined order using just the right hand. Work efficiency is also poor. For example, if one piston requires 2 seconds of work time, then in the case of a four-cylinder engine, 8 seconds of work time is required for one engine.

Furthermore, if the piston rings are removed in the wrong order, the assembly positions of the piston rings relative to the piston will be reversed, creating a problem in ensuring the quality of the engine.

The present invention aims to solve these problems.

<Means for solving the problems> In order to solve the above problems, the present invention is configured as follows.

For example, as shown in FIGS. 1 and 2, at least two types of piston rings 50 and 51 are individually stored in respective storage cases 23 and 24, and are sequentially delivered to the ring extraction side. Moreover, on the ring take-out side of each of the storage cases 23 and 24, take-out members 28 and 29 are respectively disposed in a state in which they are displaced from each other with respect to the delivery direction of the piston rings 50 and 51. Each of these take-out members 28 and 29 is configured to be able to individually receive the foremost piston rings 50 and 51 located on the take-out side of the respective storage cases 23 and 24.

Each of the above-mentioned take-out members 28 and 29 is configured to be able to lift up the piston rings 50 and 51 received therein to the same height by the operation of a single actuator 32. Further, one of the ejecting members (for example, the ejecting member 29 on the right side in FIG. 1) lifts up the piston ring 51 that it receives at the same time as the above-mentioned lift-up. Removal member 28)
It is configured so that it can be moved to a position where it overlaps concentrically with respect to the piston ring 50 that is received therein.

<Function> According to the above configuration, each storage case 23, 24
The first piston rings 50, 51 located on the ring take-out side are received by the take-out members 28, 29 and are on standby. Therefore, by operating the actuator 32, each extraction member 28, 29 is removed from each piston ring 5.
0,51 is lifted up, and at the same time one extraction member 29 removes its piston ring 51.
is moved to a position where it overlaps concentrically with the piston ring 50 received by the other extraction member 28.

In other words, the piston rings 50 and 51 are in a state where they are superimposed in a predetermined order and both are lifted up to the same height. Therefore, the operator can take out each piston ring 50, 51 in its superposed state with one touch and set it at a predetermined location (ring expansion machine).

<Example> Next, embodiments of the present invention will be described with reference to the drawings.

First, in FIG. 4 and FIG. 5, which shows a part of FIG. 4 in a perspective view, the ring expander 10 has a fixed holding mold 12 provided at the center of the upper surface of a base 11 thereof. A semi-circular setting surface 12a for setting two types of piston rings 50 and 51, which will be described later, is formed at the center of the upper surface of the fixed holding mold 12.

A plate 15 is fixed to the upper end of a pair of guide columns 14 that extend from the base 11 through both left and right ends of the fixed holding mold 12, and an air cylinder 16 for raising and lowering is attached to the upper surface of the pair of guide columns 14. ing. Further, the tip of the rod 16a of the air cylinder 16 is coupled to a movable holding mold 13 that is assembled to be movable up and down along both guide columns 14. Therefore, by controlling the supply and discharge of air to and from the air cylinder 16, the movable holding mold 13 moves up and down along the guide column 14. A semicircular arc-shaped setting surface 13a corresponding to the setting surface 12a of the fixed holding mold 12 is formed at the center of the lower surface of the movable holding mold 13.

A support member 21 is fixed to the right side of the upper surface of the base 11 of the ring expander 10, and a substrate 22 of the ring extraction device 20 is fixed to the support member 21. Further, on the upper part of this substrate 22, a second
As is clear from the figure, storage cases 23 and 24 each having an open upper surface and having a gutter shape are assembled to individually store, for example, two types of piston rings 50 and 51, respectively.

The ring take-out device 20 described above is mounted with an inclination such that the ring take-out side (the left side in FIG. 2) of each of the storage cases 23 and 24 is lower with respect to the upper surface of the base 11 of the ring expander 10. (See Figure 4). Therefore, each storage case 23,
Each piston ring 5 housed in 24
0 and 51 are sequentially delivered to the take-out side according to the inclination of these storage cases 23 and 24.

Further, as is generally well known, each of the piston rings 50 and 51 is a C-shaped compression ring having notches 50a and 51a on a portion of its circumference. Therefore, each storage case 2
Each piston ring 50, 51 is located at the bottom of 3, 24.
Projections (not shown) are formed along the delivery direction to always engage with the notches 50a, 51a of the piston rings 50, 51 to position the piston rings 50, 51 in the circumferential direction. Furthermore, each piston ring 50, 41 is provided at the top of each storage case 23, 24.
Guide rod 23 that supports and guides its delivery.
a, 24a are arranged.

Each of the storage cases 23 and 24 has a semi-circular receiving portion 30 and 31 on the ring take-out side that can receive the first piston ring 50 and 51 sent there, respectively. Members 28 and 29 are provided. Each of these take-out members 28 and 29 is connected to the base plate 2 of the ring take-out device 20.
2, it is supported by a link mechanism 40.

When the link mechanism 40 is operated from the state shown in FIG. 1 to the state shown in FIG. 3, one of the take-out members 28 is lifted upward along the guide member 25 fixed to the base plate 22. At the same time, the other ejecting member 29 is lifted up by the same height and the ejecting member 29 is lifted up so that its receiving portion 31 overlaps with the receiving portion 30 of the ejecting member 28.
It is configured to move toward the front side of 8.

Therefore, to explain the link mechanism 40 in detail, a pair of link levers 41 and 42 arranged parallel to each other have their respective lower ends connected to pins 41a and 42a with respect to the base plate 22 of the ring takeout device 20.
and the upper ends of each are rotatably connected to the take-out member 29 located on the right side in FIGS. 1 and 2 by pins 41b and 42b. . Further, another link lever 44 is provided approximately in the middle of the link lever 41.
The lower end of the ring lever 44 is rotatably connected by a pin 44a, and the upper end of this ring lever 44 is connected to the pin 44a.
It is connected to the left take-out member 28 by b.

An arm portion 43 is integrally formed in a part of one link lever 42 constituting the link mechanism 40, and the tip of the rod 32a of the air cylinder 32 used as the actuator of the ring take-out device 20 is attached to a pin. 43a. Note that the base end of the air cylinder 32 is rotatably attached to the base plate 22 of the ring take-out device 20.

In the above configuration, now the ring take-out device 2
0 is in the state shown in Figure 1, and each storage case 2
The first piston rings 50, 51 located on the ring extraction side of the rings 3, 24 are connected to the respective extraction members 28,
29, respectively. The notches 50a, 51a of both piston rings 50, 51 are connected to the protrusions 30a, 3 formed in advance on the receiving parts 30, 31.
1a, the piston rings 50, 51
is positioned in the circumferential direction.

Therefore, the supply and discharge of air to and from the cylinder 32 is controlled to operate the rod 32a from the state shown in FIG. 1 to the state shown in FIG. 3. Accordingly, each of the link levers 41, 42, and 44 constituting the link mechanism 40 operates to the state shown in FIG. 3, respectively. As a result, each of the above-mentioned extraction members 2
8 and 29 are both lifted up to the same height, and at the same time, the take-out member 29 located on the right side moves to a position where its piston ring 51 is concentrically overlapped with the piston ring 50 of the take-out member 28 located on the left side. . In other words, two types of piston rings 5
0 and 51 are concentrically polymerized and lifted up to the same height.

Therefore, the worker holds the piston 60 in his left hand as shown in FIG. The piston rings 50, 51 are set on the setting surface 12a of the fixed holding mold 12 in the ring expander. Next, the movable holding mold 13 is lowered along the guide column 14 by controlling the supply and discharge of air to and from the lifting air cylinder 16 of the ring expander 10, and the air cylinder 18 for ring expansion, which will be described later, is lowered.
is controlled to expand the diameter of each piston ring 50, 51.

In this state, the worker holds the piston 60 in his left hand in the space created by the setting surfaces 12a and 13a of the fixed holding mold 12 and the movable holding mold 13.
That is, each piston ring 5 in the expanded state
Set to the inner circumference of 0.51. After this, the diameter of each piston ring 50, 51 is reduced to its original size,
And the movable holding mold 13 is raised. This results in
Each piston ring 50, 51 is assembled at a proper position relative to the outer periphery of the piston 60, and the work for assembling the piston rings is completed.

In addition, in FIGS. 1 and 3, two limit switches 26 and 27 are fixed to the base plate 22 of the ring take-out device 20. These limit switches 26 and 27 are connected to the ring take-out device 20.
The extraction member 2 is removed based on the operation of the air cylinder 32.
8 and 29 are lifted up to the state shown in FIG. 3, or returned to the state shown in FIG. 1, by contact with a portion of the link mechanism 40, respectively. The supply and discharge of air to and from the air cylinder 32 can be switched using electrical signals from these limit switches 26 and 27.

FIG. 6 shows each air cylinder 1 of the ring expander 10.
6 and 18 and the air cylinder 32 of the ring take-out device 20. In FIG. 6, reference numeral 70 is an air source, 71 is an air pressure adjustment unit, and 72 is the ring expansion air cylinder 18.
a switching valve that controls the supply and discharge of air pressure to and from the
Reference numeral 3 designates a switching valve that controls the supply and discharge of air pressure to and from the lifting air cylinder 16 in the ring expander 10.

When the movable holding mold 13 is lowered by supplying air pressure to the air circuit A of the lifting air cylinder 16 in the ring expander 10 by switching the switching valve 73, the air cylinder 32 of the ring take-out device 20 The above-mentioned extraction members 28 and 29 are
It operates to return to the return position shown in the figure. Also,
By switching the switching valve 73, the ring expander 10
When the movable holding mold 13 is raised by supplying air to the air circuit B of the lifting air cylinder 16 in
operates to lift up the extraction members 28, 29 as shown in FIG.

Note that the air cylinder 3 of the ring take-out device 20
Residual pressure treatment valve 7 is installed in the air circuit B for 2.
It is also possible to provide an air cylinder 4 and operate only the air cylinders 16 and 18 in the ring expander 10 by manual operation thereof.

<Effects of the invention> As described above, the present invention individually stores the first piston ring on the ring take-out side of each storage case that can individually store at least two types of piston rings and send them out sequentially to the take-out side. The respective ejecting members received by the piston ring are arranged to be displaced from each other with respect to the feeding direction of the piston ring, and each ejecting member is configured to use a single actuator to move the piston ring received thereto to the same height. By lifting up and simultaneously moving one extraction member to a position where the piston ring is superposed concentrically with the other piston ring, the piston rings to be taken out are stacked in a predetermined order. After being lifted up, the operator can take out each piston ring combined in a superposed state with a single touch and set it in the ring expander. This reduces the burden on workers during the engine assembly process, shortens the work time, and ensures that each piston ring is always assembled in the correct position relative to the piston, ensuring appropriate quality. It has the following effect.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of the ring take-out device, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 shows the operating state of the ring take-out device.
Figure 4 is a front view showing the arrangement relationship between the ring expansion machine and the ring take-out device, and Figure 5 shows the ring expansion machine and the piston and piston ring setting operation state. The external perspective view shown in FIG. 6 is an air circuit diagram of each air cylinder in the ring expander and the ring take-out device. 20...Ring take-out device, 23, 24...Storage case, 28, 29...Take-out member, 32...Actuator (air cylinder), 50, 51...
Piston ring, 60...piston.

Claims (1)

[Scope of Claim for Utility Model Registration] A storage case that individually stores at least two types of piston rings assembled on the outer periphery of a piston and can be sent out sequentially to the take-out side; and a piston ring on the ring take-out side of each storage case. and ejecting members arranged mutually displaced with respect to the ejecting direction and individually receiving the foremost piston ring located on the ejecting side of each storage case, each ejecting member being actuated by a single actuator. thereby restoring the piston rings they each receive to the same height, while at the same time moving one ejection member to a position where its piston ring is concentrically superimposed on the piston ring of the other ejection member. A piston ring take-out device configured as follows.