Fluent material handling – with receiver or receiver coacting mea – With means to move supply means and/or receiver to – from or... – With clamp for receiver interconnected with movable head or...
Reexamination Certificate
2002-06-05
2003-12-16
Jacyna, J. Casimer (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
With means to move supply means and/or receiver to, from or...
With clamp for receiver interconnected with movable head or...
C141S094000, C141S284000
Reexamination Certificate
active
06662833
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an apparatus for incorporating or assembling components and simultaneously filling liquid for the assembly of a liquid-sealed vibration-proof mount, which is principally used for supporting an automotive engine, etc. in a vibration-proof manner.
2. Description of Related Art
As a mount for supporting and bearing an automotive engine or the like so as not to transmit its vibrations to the vehicle body, there is known a liquid-sealed vibration-proof mount as exemplified in
FIG. 12
, which comprises a main body fitting
2
of a circular form, a rubber elastomer
3
as a vibration-isolating base and a diaphragm
4
thereby constituting part of a room wall and an interior of a main body filled with liquid, a partition
5
partitioning the interior into upper and lower liquid chambers
6
a
,
6
b
so that both liquid chambers may communicate with each other through an orifice
7
in the partition
5
, whereby vibrations are attenuated and absorbed owing to the liquid fluidization resistance by the orifice
7
and the vibration-isolating effect of the rubber elastomer
3
.
Such a liquid-sealed type of vibration-proof mount is assembled in such a procedure that main components body
1
having an interior space for filling liquid is beforehand fabricated by vulcanization-bonding the rubber elastomer
3
to an opening end side of the main body fitting
2
and vulcanization-bonding an attachment fitting
8
to the rubber elastomer
3
; companion components to the main components body
1
, i.e. the partition
5
, the diaphragm
4
and so on are incorporated into the main components body
1
and concurrently, the interior is filled with liquid in a sealing manner.
For the work of incorporating or assembling the components into the main body
1
and of sealing liquid in the assembly of the above-mentioned vibration-proof mount, a rather large liquid tank has been hitherto used. This components incorporating work was conducted in liquid by setting sequential steps comprising: a step of setting and holding the main components body within the liquid in this liquid tank, a step of incorporating the components including the partition, diaphragm, etc. into the main components body, a caulking step for locking the components thus incorporated and assembled, and a step of removing the mount thus assembled out of the liquid tank.
With the conventional system of simultaneously incorporating components and sealing liquid for the vibration-proof mount, large-scale conveying means as well as a large-sized liquid tank were needed and accordingly, an installation space for them becomes large and besides, the change work in setting height, treatments against troubles and maintenance control were awkward and troublesome. Moreover, extraneous matters such as molding sand, rubber remnant, etc. tended to creep in the liquid tank, which were likely to be responsible for entrainment of bubbles, etc. causing a poor assembling. Further problem was that cleaning work for an outer peripheral portion of the mount product after assembly was troublesome.
To overcome the prior art problems described above, therefore, the present inventors have formerly proposed a system for incorporating components and sealing liquid using a relatively small liquid tank, which is disclosed in JP Patent Publication 11(1999)-230235 A.
The formerly proposed system comprises, while holding a main components body faced upwardly in a nearly upright state, depressing a liquid tank that is positioned upwardly of the main components body to be capable of ascending or descending and possesses an aperture at a part of its bottom; fitting the aperture to an outer periphery of the main components body to install the tank to the main components body so as to maintain a sealing state; supplying liquid onto the bottom of the liquid tank where the aperture is disposed, thus flowing the liquid into the interior space of the main components body through its opening and storing a required amount of liquid on the bottom; soaking components, i.e. a partition, a diaphragm and so on in the liquid, as it is stored, and fitting them, under deaeration, into the interior and the opening of the main components body by actuating a components incorporating mechanism composed of a multi-spindle articulated robot, etc. thereby incorporating them and filling liquid; and thereafter discharging the liquid stored in the liquid tank out of the bottom and removing the liquid tank from the main components body.
Here, when incorporating components in the condition that the liquid is supplied and stored on the bottom of the liquid tank, it is required to ensure that a liquid level height of the stored liquid be more than a definite value, from the viewpoints of conducting deaeration operation of the components and preventing entrainment of bubbles. That is, the less the liquid amount and the lower the liquid level height, the more difficult is the deaeration operation and the more easily are the bubbles entrained. As a consequence, it is necessary to replenish the liquid appropriately, depending on the decrease or decrement in liquid amount every liquid sealing work.
To that end, it was contrived to provide liquid replenishing means for replenishing liquid to the liquid tank such as a pump together with a liquid level detector tube for detecting the liquid level height, by means of which the fact that the liquid level height has reached a definite level is detected as a detection signal, on the basis of which the actuation of the components incorporating mechanism may be controlled. On the other hand, in cases where the liquid level height does not reach a definite level, the liquid replenishing means is actuated on the basis of the detection signal so that liquid may be replenished.
In cases where the liquid is supplied onto the bottom of the liquid tank every work for incorporating components and sealing liquid as mentioned above, however, the problems were encountered that the liquid level was liable to fluctuate up and down owing to the fluidization action of the liquid when supplied and impacts upon incorporation of components by means of a hand of the components incorporating mechanism. Further also inside the liquid level detector tube, the liquid will pulsate up and down accompanied thereby. Stated another way, due to the aforementioned pulsation, the liquid level detector tube will detect that the liquid level has reached a definite level earlier than the actual rise in liquid level or will detect repeatedly the situations where the liquid level height is above and below the definite level.
As a result, the actuation of the components incorporating mechanism comes to start earlier and the deaeration operation upon incorporation of components will be insufficient, which leads to a danger of entrainment of bubbles. Otherwise the components incorporating mechanism will cause an error operation or the operation of it will be frequently suspended, which is responsible for failure of the mechanism and detracts from the durability.
SUMMARY OF THE INVENTION
The present invention has been made to solve the foregoing problems of the components incorporating and liquid sealing apparatus mentioned above taking advantage of the ascending and descending of the liquid tank and the liquid supply and discharge actions. Accordingly, the invention is aimed at enabling the liquid level height upon supplying of liquid to be detected accurately thereby ensuring the control of the apparatus based on the detecting signal and at enabling the components incorporating and liquid sealing work to be carried out with high efficiency.
The invention is concerned, in a broad sense, with an apparatus for incorporating components and sealing liquid for the assembly of a liquid-sealed vibration-proof mount, which comprises a setting and holding section for a main components body, wherein the main components body for the vibration-proof mount having an interior space and an opening at one end side thereof is supported and se
Inada Tsuyoshi
Sasaki Akio
Tsujimoto Yoshikazu
Jacyna J. Casimer
Toyo Tire & Rubber Co., Ltd.
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