JP4833759B2 - Liquid sealing device for liquid ring mount - Google Patents

Description

  The present invention relates to an apparatus for enclosing a liquid in a workpiece when manufacturing a liquid ring mount, and particularly relates to a configuration for connecting a nozzle to an enclosure port.

  Conventionally, a liquid seal mount in which a liquid is sealed inside a rubber elastic body has been used as an engine mount of an automobile. When manufacturing this liquid seal mount, a liquid such as ethylene glycol is sealed in the liquid chamber of the mount work (before the liquid is sealed). At that time, in order to prevent air from remaining, Is sucked by a vacuum pump or the like and forcibly exhausted, and then liquid is sealed.

For example, in the one described in Patent Document 1, a nozzle of a liquid filling pipe is connected from above to a communication hole to a liquid chamber that opens on the upper surface of the mount work, and first, air in the liquid chamber is firstly passed through this nozzle by a vacuum pump. Aspirate (vacuum). Then, after confirming that the air has been sufficiently discharged by a vacuum gauge or the like, the liquid filling pipe is switched to the liquid supply pipe (liquid supply line) for communication, and the liquid supplied from the liquid supply pipe is connected to the corner of the liquid chamber by negative pressure. I try to fill it up.
Japanese Patent Laid-Open No. 2-25307

  By the way, in order to evacuate the liquid chamber of the workpiece as described above, the nozzle must be airtightly connected to the opening (enclosure port) on the upper surface and pressed firmly. Since it is attached to the apparatus side, the operator must position the workpiece on the table so that the sealing port on the upper surface faces the nozzle, and hold it so that it does not move.

  Therefore, a holding tool for positioning and holding the workpiece as described above is provided on the table. In order to accurately perform positioning by such a holding tool, the dimensional accuracy of the holding tool is provided. It is necessary to increase the height of the workpiece, and then the workpiece must be fitted into the holder and set, which makes the setting work cumbersome.

  In addition, if the workpiece is misaligned due to poor setting, the connection state between the sealing port and the nozzle may be deteriorated, and the liquid chamber may not be evacuated sufficiently, or the sealed liquid may leak. Therefore, it is desirable to eliminate such artificial setting errors as much as possible.

  In addition, in the case of a cylindrical workpiece with few irregularities, it is difficult to accurately position the circumference of the central axis (that is, in the circumferential direction) with a holder, and it is easy to cause an artificial setting error as described above. A protrusion or notch with a certain size or more must be provided on the workpiece only for positioning with the holder. This is an essentially useless constraint in mount design.

  In view of such points, the object of the present invention is to prevent the occurrence of artificial setting errors as much as possible without providing unnecessary projections or the like even when liquid is sealed in a cylindrical mount work. An object of the present invention is to provide a liquid sealing apparatus that can be suppressed and that can easily set a workpiece.

  In order to achieve the above object, in the liquid sealing apparatus of the present invention, when the mount work is set on a holder on the rotary table, the position of the sealing opening opened on the upper surface is detected by a sensor, and the upper nozzle It is configured to automatically adjust the position of.

That is, the invention of claim 1 is directed to a liquid sealing device for a liquid ring mount that encloses a liquid in a liquid chamber of the mount work, and the mount work is substantially cylindrical, and one end surface of the mount work is around the central axis. When the sealing port is provided on the circumference of a predetermined radius and communicates with the liquid chamber, the mount work is arranged so that the one end surface is the upper surface and the central axis is the approximate rotation center. A holder that is held on the rotary table, a nozzle that is spaced above the rotary table and is disposed downward on the circumference of the predetermined radius around the rotation center line, and is held by the holder. a sensor for detecting the position of the sealing port mounting work top has, in response to a signal from said sensor, said rotation as filling port of the mounting workpiece upper surface facing the upper nozzle by a motor A rotary movement means for rotating the table, and a connection movement means for moving at least one of the nozzle and the rotary table in the vertical direction so as to be close to each other and connecting the nozzle to the sealing port of the mount work. To do.

  In the liquid sealing apparatus having the above-described configuration, when the operator sets the mount work on the holder on the rotary table so that one end surface thereof is on the top, the center axis of the mount work is rotated by the holder. It is held so as to be approximately coincident with the center. In this state, a signal related to the position of the sealing port on the upper surface of the mount work is output from the sensor, and the rotary table is rotated and moved by the rotational movement means that receives this signal, so that the sealing port faces the nozzle above it. . Then, at least one of the nozzle and the rotary table is moved up and down by the connection moving means so as to be close to each other, and the nozzle is connected to the sealing port of the mount work.

  That is, according to the above configuration, the rotary table on which the work is placed is rotated based on the signal from the sensor, and the position of the sealing port is automatically adjusted to the upper nozzle. Is unlikely to occur. In addition, when an operator sets a workpiece on the holder, it is only necessary to roughly align the center of the workpiece with the center of rotation of the rotary table. It can be said that mistakes are even less likely to occur.

  Moreover, when setting, it is only necessary to align the center axis of the workpiece as described above, and accurate positioning around the center axis is not necessary. There is no need to provide a protrusion or the like for positioning.

  Preferably, the sensor is provided on the circumference of a predetermined radius around the rotation center line so as to be spaced apart above the rotary table so as to detect the position of the sealing opening facing the lower side. The rotary table is rotated and moved by the rotation moving means until the sensor detects the position of the sealing port (invention of claim 2). In this way, even if the work inlet held on the rotary table is greatly displaced in the circumferential direction, the position can be detected by the sensor.

  In that case, it is more preferable that a flat seal surface is formed on one end surface of the work so as to surround the sealing port and the tip of the nozzle abuts on the side of the seal surface extending in the radial direction at the one end surface. The edge is formed in a stepped shape, and the position of the stepped side edge is detected by a sensor (invention of claim 3).

  In this way, for example, even if the workpiece is set on the rotary table with a slight tilt, the seal extending in the radial direction over a wider range than the sealing port even if the sealing port on the upper surface is displaced in the radial direction. The side edge of the surface can be detected by a sensor. Since the distance from the side edge of the seal surface to the center of the sealing port is determined in advance, detecting the side edge is substantially synonymous with detecting the position of the sealing port.

  It is particularly effective to use the liquid sealing apparatus having the above-described configuration. The mount work has a main body member having a hollow portion that opens toward one end side of the central axis thereof, and is attached to the main body member from the one end side. And a closing member that forms a liquid chamber by closing the hollow portion, and an enclosure port is opened on the closing member (invention of claim 4).

  That is, when the mount work is divided into a main body member (hereinafter also referred to as a work main body) and a closing member, and the sealing member has an opening, the work main body is accurately positioned on the holder on the table. Even if it can be held, if the position of the closing member is deviated with respect to the work body, the sealing port that opens there does not align with the nozzle.

  Therefore, in the case of a mount work having such a structure, the above-described action of the present invention is particularly effective. In other words, if the liquid sealing apparatus of the present invention is used, it is possible to eliminate the need for positioning in the circumferential direction between the main body member and the closing member in the mount work having the structure as described above. If so, there is a possibility that the manufacturing structure can be reduced by simplifying the structure of the mount.

  As described above, according to the liquid sealing device for a liquid ring mount according to the present invention, the position of the sealing port on the top surface of the mount work placed on the rotary table is detected by the sensor, and the rotary table is accordingly detected. Since the position of the nozzle is rotated and automatically aligned with the upper nozzle, the occurrence of an artificial setting error can be suppressed as much as possible. Also, the operator only has to set the work according to the rotation center of the rotary table, and the work is very easy, and it is necessary to provide a protrusion for positioning even a cylindrical work with few irregularities. As a result, there is no unnecessary restriction in the mount design.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Configuration of liquid sealing device)
1 to 8 show an embodiment of a liquid sealing apparatus according to the present invention, and this liquid sealing apparatus encloses a liquid in a work W (mount work) of an engine mount separately created by vulcanization integrated molding. Is for. FIG. 1 schematically shows the configuration of the apparatus as viewed from the front, and a table 2 on which a workpiece W is placed is disposed at a substantially central portion in the vertical direction of the main body frame 1. The table 2 is a rotary table formed in a disk shape, and as shown in an enlarged view in FIG. 2, a holder 3 for holding the workpiece W in an upright state at a substantially central portion of the upper surface thereof. Is arranged.

  That is, the rotary table 2 will be described later in detail with reference to FIG. 4, but around the vertical axis Z (rotation center line) through the gear 41 and the like by the operation of the electric servo motor 40 of the moving mechanism 4. The holder 3 holds the substantially columnar workpiece W so that the center axis C (see FIG. 3) coincides with the rotation center line Z of the general rotary table 2. Is. The clearance between the holder 3 and the workpiece W is set to be relatively large, and the workpiece W can be easily set. The holder 3 of this embodiment is provided with resin protrusions 3a and 3a for positioning the bracket portion h1 of the housing H of the workpiece W from both sides in the circumferential direction. Also good.

  The moving mechanism 4 also includes an air cylinder 45 for moving the rotary table 2 in the vertical direction. The air cylinder 45 is disposed upward in the base 5 of the liquid sealing apparatus, and three shafts 46, 46,... Rotatably connected to the tip of the rod 45a respectively move the gear 41 up and down. It penetrates in the direction and is connected to the rotary table 2. As the rotary table 2 moves up and down, the workpiece W moves from the lowest position where it can be easily set (the height of the waist of the operator) to the highest position where the liquid is sealed by the valve unit 6.

  The valve unit 6 is mounted on the upper surface of a support plate 7 attached to the front portion of the frame 1 at a height about the operator's shoulder, and will be described in detail later with reference to FIGS. And a nozzle 8 connected to a liquid sealing hole d2 (see FIG. 3) that opens at the top of the workpiece W. The nozzle 8 is connected to the sealing hole d2 of the workpiece W in an airtight manner, and exhausted from the liquid chamber w1. The supply of the liquid thereto and the collection of the residual liquid in the nozzle 8 can be switched.

  The connection of the nozzle 8 to such a sealing hole d2 is automatically performed by the operation of the moving mechanism 4. Although details will be described later with reference to FIGS. 4 and 5, in this embodiment, a sensor 10 is provided for detecting the position of the sealing hole d <b> 2 of the workpiece W set in the holder 3 of the rotary table 2. ing.

-Structure of mount M-
Here, as shown in FIG. 3, an engine mount M, which is a workpiece W, has a connecting metal A connected to the vehicle body by a bracket (not shown) and a cylindrical shape that surrounds the outer periphery of the connecting metal A in a spaced manner. A housing H, and a connecting metal fitting A protrudes from the lower end side of the housing H (the other end side in the direction of the central axis C) and is connected by a rubber elastic body R so as to be relatively displaceable in the axis Z direction. Has been. On the other hand, on the outer periphery of the upper end side (one end side in the direction of the central axis C) of the housing H, a bracket portion h1 connected to the engine side is projected.

  As shown in the drawing, the rubber elastic body R has a conical shape narrowed downward, and connects the upper inner periphery of the housing H and the upper outer periphery of the connection fitting A. In order to reinforce the joint portion, a cylindrical reinforcing metal fitting r1 is embedded. The rubber elastic body R has a hollow portion that opens upward, and the rubber elastic body R and the housing H constitute a main body member (mount work main body) of the work W.

  The orifice plate O and the rubber diaphragm D (closing member) are attached to the main body member of the workpiece W from above so as to close the opening of the hollow portion of the rubber elastic body R. A portion near the outer periphery of the diaphragm D is formed to be relatively thick and covers the entire outer periphery of the orifice board O, and a reinforcing metal fitting d1 is also embedded therein.

  Thus, the hollow portion of the rubber elastic body R whose opening is closed by the diaphragm D is filled with a liquid as will be described later to form a liquid chamber w1, and this liquid chamber w1 is separated from the lower main liquid chamber and the upper portion by the orifice plate O. It is divided into a secondary liquid chamber. The main liquid chamber and the sub liquid chamber are communicated with each other by an orifice o1 formed in a spiral shape at a portion near the outer periphery of the orifice plate O, and the vibration is attenuated by the resistance of the liquid flowing through the inside. ing.

  Further, in the example shown in the drawing, a radially inwardly bulging portion is formed on the opposite side of the housing H to the bracket portion h1 in the portion near the outer periphery of the diaphragm D, and penetrates in the thickness direction (vertical direction). Thus, a hole d2 having a lower end communicating with the liquid chamber w1 through the orifice o1 is formed. The hole d2 is a liquid sealing hole into the liquid chamber w1, and a spherically enlarged portion is provided at a substantially central portion thereof, and a steel ball S is fitted therein as described later. Due to this, it is closed.

  In this embodiment, the upper end opening (enclosure opening) of the enclosure hole d2 is located on the circumference around the central axis C of the workpiece W. The diameter of this circumference is determined by the dimension of the thin part near the center of the diaphragm D, the dimension of the orifice board O, and the like. Further, a thick seal portion of the diaphragm D protrudes upward in a substantially rectangular range extending in the radial direction around the opening, and has a flat seal whose upper surface is in airtight contact with the tip of the nozzle 8. The surface is d3. Although only shown in FIG. 7, the seal surface d3 is formed in a step shape in which a pair of side edge portions located on both sides in the circumferential direction of the sealing hole d2 extend in the radial direction.

-Connection of sealing hole to nozzle-
When the work W is sealed with the work W as described above, it is set upright on the holder 3 on the rotary table 2 and the sealing port d2 opened at the top is connected to the nozzle 8 of the valve unit 6 from below. To do. That is, as shown in FIG. 2 (b), in this embodiment, the nozzle 8 and the pressing rods 9 and 9 are provided so as to extend downward from the lower surface of the support plate 7. Are located on a circumference having the same radius as that of the sealing hole d2 with the rotation center line Z as the center, and the lower ends of the respective holes are in contact with portions near the outer circumference of the diaphragm D.

  More specifically, as shown in FIG. 4 when viewed from the side of the liquid sealing device, the workpiece W is in an upright state with respect to the holder 3 on the rotary table 2, that is, the upper surface where the sealing hole d2 is opened faces upward. Further, the center axis C is generally held so as to coincide with the rotation center line Z of the turntable 2. Here, the clearance with the holder 3 is relatively large, and it is easy to fit the workpiece W therein. Thus, the sealing hole d <b> 2 that opens to the upper part of the work W held by the holder 3 is roughly located on the circumference around the rotation center line Z of the turntable 2.

  On the other hand, the nozzle 8 is arranged on the circumference of the same radius as the sealing hole d2 around the rotation center line Z of the turntable 2 on the lower surface of the upper support plate 7 as described above. In order to position the sealing hole d <b> 2 directly below 8, the work W may be rotated by the rotary table 2. Therefore, in this embodiment, a sensor 10 for detecting the position of the sealing hole d2 of the workpiece W set in the holder 3 is provided, and is positioned directly below the nozzle 8 when the position of the sealing hole d2 is detected. It has become.

  That is, the sensor 10 is supported by the guide cylinders 11 and 11 below the support plate 7 that supports the nozzle unit 6 so as to be movable in the front-rear direction (left-right direction in the figure) of the liquid sealing device. It is designed to move forward and backward. Although only one is shown in the figure, two guide cylinders 11, 11 are provided side by side on the liquid sealing device, and the outer cylinders 11 a, 11 a are attached to the device frame 1 side together with the front end portion of the air cylinder 12. It is fixed to the vertical wall member 13.

  On the other hand, the front end portions of the inner cylinders 11b, 11b of the guide cylinders 11, 11 are fixed to the connecting plate 14 together with the front end portion of the rod 12a of the air cylinder 12, and are also connected to the sensor 10 via the connecting plate 14. The operation of the air cylinder 12 causes the connecting plate 14 and the sensor 10 to be guided by the left and right guide cylinders 11 and 11 and to move in parallel back and forth. A cover member 15 is provided above the sensor 10 so as to cover up to the front portions of the guide cylinders 11 and 11.

  Thus, the sensor 10 that is moved back and forth is normally positioned at a retracted position indicated by a solid line in the drawing so that the sensor 10 does not interfere with the workpiece W as the rotary table 2 rises. At the position, when detecting the sealing hole d2 of the workpiece W above it, it advances to the advance position shown by the phantom line in the figure and is positioned directly below the nozzle 8. As schematically shown in FIG. 5, the sensor 10 projects the laser light L toward the upper surface of the lower workpiece W (the upper surface of the portion near the outer periphery of the diaphragm D), receives the reflected light, and increases the distance. It is a length measuring sensor to measure.

  Then, when the rotary table 2 is rotated and moved as indicated by an arrow in the figure while measuring the distance to the upper surface of the lower workpiece W by the sensor 10 as shown in FIG. 5, at the stepped side edge of the seal surface d3. Since the measurement distance changes suddenly, the output of the sensor 10 changes stepwise, and the side edge is detected based on this. Here, since the distance from the side edge of the seal surface d3 to the center of the sealing hole d2 is determined in advance, detecting the side edge as described above substantially detects the position of the sealing hole d2. It is synonymous with that.

  Then, after detecting the side edge of the seal surface d3, if the rotary table 2 is rotated by the distance from there to the center of the sealing hole d2, the sealing hole d2 is positioned directly below the sensor 10, It faces the nozzle 8 above it in the vertical direction. Therefore, when the sensor 10 is moved backward by the operation of the air cylinder 12 and the rotary table 2 is raised, the peripheral edge portion (seal surface d3) of the sealing hole d2 of the work W held thereon is moved from below to the tip of the nozzle 8. As a result, the sealing hole d2 and the nozzle 8 are connected in an airtight manner.

  Such rotation and raising / lowering operation of the rotary table 2 is performed by a moving mechanism 4 provided inside the base 5. This moving mechanism 4 is integrally provided with a mechanism for rotating the rotary table 2 by the electric servo motor 40 and a mechanism for raising and lowering the rotary table 2 by the air cylinder 45. Although not shown in FIG. 4, the electric servo motor 40 is attached to the lower part of the top plate 5 a of the base 5 of the liquid sealing device, and via a pinion 42 (see FIG. 1) fixed to the output shaft thereof. The gear 41 is rotated. The shaft portion 41a of the gear 41 is rotatably attached to the top plate 5a via a bearing portion 43 that passes through the top plate 5a.

  On the other hand, the air cylinder 45 for raising and lowering is arranged upward on the bottom plate 5b of the base 5, and as described above with reference to FIG. 1, the tip (upper end) of the rod 45a extending from the upper end thereof is Three shafts 46, 46,... Are connected to each other by a joint portion 47 so as to be freely rotatable. The three shafts 46, 46,... Are slidably inserted into upper and lower through holes formed in the shaft portion 41 a of the gear 41, and their upper ends are fixed to the lower portion of the rotary table 2. ing.

  Therefore, when the gear 41 is rotated by the operation of the electric servo motor 40, the three shafts 46, 46,... Rotate together with the gear 41, thereby rotating the turntable 2. Further, when the rod 45a of the air cylinder 45 moves forward and backward, the three shafts 46, 46,... Move in the axial direction, that is, the vertical direction, and thereby the rotary table 2 is raised or lowered. Although not shown, the air cylinder 45 is provided with an electromagnetic on-off valve for switching the supply direction of high-pressure air.

  Such operation control of the electric servo motor 40 and the air cylinder 45, that is, operation control of the moving mechanism 4 is performed by a controller (not shown). The controller and the electric servo motor 40 of the moving mechanism 4, the gear 41, and the like constitute rotational moving means for rotating the rotary table 2 so that the sealing port d <b> 2 of the workpiece W faces the upper nozzle 8. Further, the connecting and moving means for moving the rotary table 2 in the vertical direction by the air cylinder 45 and the shafts 46, 46,... Of the moving mechanism 4 and connecting the sealing hole d2 of the workpiece W thereon to the nozzle 8 is configured. Has been.

-Valve unit-
As shown in FIG. 6, the upper end of the nozzle 8 to which the sealing hole d2 of the workpiece W is connected to the lower end passes through the support plate 7 as shown in FIG. It is connected to the main body member 20. The valve unit main body 20 is made of a metal block, and four open / close valves 21a, 21b, 22, 23 are arranged in a T shape in a cross section viewed from above as shown in FIG. 7, and are respectively air cylinders 71a, 71b. , 72, 73 are integrally connected so that the spool is opened and closed.

  The valve unit body 20 is formed with a common passage 20a extending up and down substantially in the center so as to be surrounded by the four on-off valves 21a, 21b, 22, and 23. That is, the main body member 20 has a columnar member that can be divided, and the common passage 20a vertically penetrates the member, and each open / close valve 21a is formed by a branch passage (not shown) formed in the member. , 21b, 22, 23. The lower end of the common passage 20a opens to the lower surface of the valve unit body 20 and communicates with the passage in the nozzle 8.

  On the other hand, the upper end of the common passage 20a that opens to the upper surface of the valve unit body 20 communicates with the passage 24a in the passage forming member 24 that is arranged on the upper surface. The passage 24a is for supplying the steel ball S to the common passage 20a of the valve unit body 20 (hereinafter also referred to as supply passage 24a), which will be described later.

  One of the two open / close valves 21a and 21b arranged vertically on the left side of FIG. 7 is connected to a liquid supply line 30 for supplying liquid to the liquid chamber w1. In this example, the other is a spare and is not connected to a line. This is for the purpose of minimizing the stop time of the liquid sealing device even when a failure such as clogging occurs in the opening / closing valves 21a, 21b (in the following description, the two opening / closing valves 21a, 21b are distinguished from each other). It is simply referred to as the open / close valve 21).

  Further, the open / close valve 22 located on the upper side of the figure is connected to an exhaust line 50 for discharging air from the liquid chamber w1 of the workpiece W, and the open / close valve 23 located on the lower side is connected to a passage in the nozzle 8 or the like. It is connected to a recovery line 60 for recovering the liquid remaining in the common passage 24a and the like of the valve unit 6. In other words, the valve unit 6 constitutes a switching valve that connects the nozzle 8 by switching to one of the liquid supply line 30, the exhaust line 50, and the recovery line 60.

-Liquid supply system-
Next, a liquid supply system to the workpiece W will be described with reference to FIG. In this embodiment, two storage tanks 31 a and 31 b that store liquid while degassing are provided, and two branch lines that branch on the upstream side of the liquid supply line 30 are respectively provided below the storage tanks 31 a and 31 b. 30a and 30b are connected, and electromagnetic opening and closing valves 32a and 32b for opening and closing the branch lines 30a and 30b are provided. Further, drain valves 33a and 33b are also provided below the storage tanks 31a and 31b, and a replenishment line 34 for replenishing liquid from a liquid replenishing device (not shown) is provided via the electromagnetic open / close valves 35a and 35b. Connected.

  That is, float switches SW, SW,... For determining the upper and lower limits of the liquid level to be stored are arranged inside the storage tanks 31a, 31b, respectively, and the liquid level is below the lower limit float switch SW. When the electromagnetic on / off valves 35a and 35b are opened and liquid is supplied from the replenishment line 34, if the liquid level exceeds the upper limit float switch SW, the electromagnetic on / off valves 35a and 35b are closed to supply liquid. Is to be stopped.

  On the other hand, a degassing line 36 for degassing the stored liquid is connected to the upper part of each storage tank 31a, 31b. The deaeration line 36 of this embodiment is connected in the middle of a recovery line 60 described later, and a vacuum regulator 37 and a vacuum gauge (not shown) are connected between the connection site and the storage tanks 31a and 31b. Further, electromagnetic open / close valves 38a and 38b are respectively provided on lines 36a and 36b branched immediately before the storage tanks 31a and 31b.

  Further, branch lines 36a, 36b of the deaeration line 36 are further connected with branch paths between the respective electromagnetic open / close valves 38a, 38b and the storage tanks 31a, 31b. Open / close valves 39a and 39b are interposed. When the electromagnetic on / off valves 39a and 39b are closed and the electromagnetic on / off valves 38a and 38b are opened, the air in the storage tanks 31a and 31b is sucked through the deaeration line 36 by the negative pressure of the recovery line 60, The liquid stored in can be degassed. On the other hand, if the electromagnetic opening / closing valves 39a and 39b of the branch paths are opened, the storage tanks 31a and 31b can be opened to the atmosphere.

  Furthermore, in this embodiment, a measuring cylinder 80 for measuring the amount of liquid supplied to the workpiece W in advance is interposed in the liquid supply line 30. On the upstream side and downstream side of the measuring cylinder 80, open / close valves 81 and 82 are disposed, respectively, and the valve bodies are opened and closed by air cylinders 74 and 75 that are integrally connected to each other. The measuring cylinder 80 is driven by the electric servo cylinder 83, and the operation stroke is controlled by a controller in the same manner as the electromagnetic open / close valve and vacuum pump in the liquid supply system or the servo motor 40 of the moving mechanism 4 and the like. Done.

  Further, a high-pressure vacuum pump 51 is connected to the exhaust line 50, and a separation tank 52 for separating gas and liquid is interposed between the high-pressure vacuum pump 51 and the valve unit 6. An open valve 53 is attached to the upper part of the separation tank 52, and a drain valve 54 is attached to the lower part. The exhaust line 50 is for sucking (evacuating) air from the liquid chamber w1 of the workpiece W before supplying the liquid by the liquid supply line 30, and thus the liquid chamber w1 in which the vacuum is evacuated. A vacuum pressure gauge 55 is connected to monitor the pressure.

  Further, the collection line 60 is for sucking and collecting the liquid remaining in the nozzle 8 and the valve unit 6 after the liquid supply, and is thus connected to a vacuum pump 61 for sucking the liquid. At the same time, a collection tank 62 for collecting and storing the sucked liquid is provided. The recovery tank 62 has the same configuration as the separation tank 52, and an open valve 63 is attached to the upper part thereof, and a drain valve 64 is attached to the lower part thereof. The deaeration line 36 is connected to the recovery line 60 between the valve unit 6 and the recovery tank 62.

  One of the three lines of the liquid supply line 30, the exhaust line 50, and the recovery line 60 is selectively connected to the nozzle 8 by the valve unit 6. That is, when the opening / closing valve 21 of the valve unit 6 is opened, the liquid supply line 30 is connected to the nozzle 8, the exhaust line 50 is opened when the opening / closing valve 22 is opened, and the recovery line 60 is opened when the opening / closing valve 23 is opened. Are connected to the nozzles 8 respectively.

  The air cylinders 71a, 71b, 72, 73 for driving the open / close valves 21 to 23 of the valve unit 6 and the air cylinders 74, 75 for driving the open / close valves 81, 82 of the measuring cylinder 80, respectively, Although not shown, it is connected to a high-pressure air supply line, which is plant equipment, via an electromagnetic switching valve.

-Steel ball supply and insertion mechanism-
Next, referring to FIG. 6 again, a structure for fitting the steel ball S into the sealing hole d2 of the workpiece W will be described. First, as shown in the drawing, the passage forming member 24 superimposed on the main body member 20 of the valve unit 6 branches from the middle of the supply passage 24a extending vertically and linearly toward the rear of the apparatus (right side in the figure). A branch path 24 b is formed so as to extend in the direction of the branch path 24, and a branch hole 24 c that branches from the middle of the branch path 24 b and extends upward and opens on the upper surface of the path forming member 24 is formed.

  The branch path 24b extends to the rear surface of the passage forming member 24 and opens there, and a rod 91 is inserted into the opening from the rear in an airtight state. The rod 91 is driven to move back and forth in the longitudinal direction (the front-rear direction of the apparatus) by an air cylinder 92. The tip of the rod 91 is located slightly behind the branch hole 24c at the most retracted position. When driven forward, the steel ball S is moved to the supply passage 24a through the branch passage 24b.

  On the other hand, the branch hole 24c opened on the upper surface of the passage forming member 24 is opened and closed by the vertical movement of the large-diameter rod 93 facing the upper side. This rod 93 is also driven forward and backward in the longitudinal direction (vertical direction) by the air cylinder 94, and an O-ring (not shown) disposed at the lower end portion is a branch hole at the most advanced (downward) position. While closely contacting the opening periphery of 24c and sealing it hermetically, if it retracts (rises) by a predetermined amount, the opening of the branch hole 24c is opened, so that the steel ball S does not interfere with the opening. become.

  A slide plate 95 is disposed on the upper surface of the passage forming member 24 so as to slide back and forth, and a round hole 95a capable of accommodating only one steel ball S is formed in the thickness direction at the front portion thereof. On the other hand, the rear end portion of the slide plate 95 is connected to an air cylinder 96 so as to be driven back and forth in the front-rear direction. When the slide plate 95 is at the most advanced position, the round hole 95a communicates with the branch hole 24c opened on the upper surface of the lower passage forming member 24. On the other hand, if the slide plate 95 is most retracted, the round hole 95a will be described below. The steel ball S supplied from above is received.

  That is, a fixed plate 97 is overlaid on the slide plate 95 and attached to the passage forming member 24 on both the left and right sides of the slide plate 95, and the fixed plate 97 is positioned at the last retracted position of the slide plate 95. A flexible tube 99 is attached via a connector 98 so as to communicate with the round hole 95a from above. In this tube 99, steel balls S are stored in a chain, and the steel balls S are supplied to the round holes 95a of the slide plate 95 at the last retracted position one by one through a passage in the connector 98. It is supposed to be.

  If the slide plate 95 is moved to its most advanced position by the operation of the air cylinder 96 in a state where one of the supplied steel balls S is accommodated in the round hole 95a, the steel ball S in the round hole 95a. Falls into the branch hole 24c that opens downward, reaches the branch path 24b, and is then sent to the supply passage 24a by the rod 91 as described above. The steel ball S sent in this way falls in the supply passage 24a, reaches the nozzle 8 from the common passage 20a of the communicating valve unit body 20, and stops in the vicinity of the sealing hole d2 of the workpiece W as shown in the figure. .

  As described above, the steel balls S are supplied to the nozzle 8 one by one through the supply passage 24a in the passage forming member 24 by the rods 91 and 93, the slide plate 95, the air cylinders 92, 94 and 96, the tube 99, and the like. A mechanism 90 (hereinafter referred to as a supply mechanism) is configured. Then, the steel ball S supplied by the supply mechanism 90 is inserted into the enclosing hole d2 of the workpiece W by the operation of the insertion mechanism 100 thereafter.

  That is, the common passage 24 a of the passage forming member 24 has a lower end communicating with the common passage 20 a of the valve unit main body 20 as described above, while an upper end of the common passage 24 a is a cylindrical member attached to the upper portion of the passage forming member 24. The rod 101 is inserted through the cylindrical member 25 in an airtight state from above. The rod 101 is provided so that its lower end side advances and retreats over the passage in the nozzle 8 via the common passage 20 a, while its upper end is connected to the air cylinder 102, which is longer than the operation of the air cylinder 102. It is driven forward and backward in the direction (vertical direction).

  At the position where the rod 101 is most retracted (raised), the tip remains in the cylindrical member 25 so as not to prevent the steel ball S from entering the supply passage 24a from the branch passage 24b in the passage formation member 24. become. On the other hand, at the most advanced (downward) position, the tip of the rod 101 protrudes below the lower end of the nozzle 8 and pushes the steel ball S into the sealing hole d2 of the workpiece W. That is, the rod 101 and the air cylinder 102 constitute a fitting mechanism 100 (fitting means) for fitting the steel ball S into the sealing hole d2 of the workpiece W through the nozzle 8.

(Manufacturing procedure for liquid ring mount)
Next, a manufacturing procedure of the liquid seal mount will be described. First, the manufacture of the workpiece W itself will be briefly described. In the case of the liquid seal mount M of this embodiment, the connecting metal fitting A and the reinforcing metal fitting r1 are set in a mold, and a predetermined amount that becomes the rubber elastic body R and the rubber layer. These unvulcanized rubber compositions are also set in a mold, and these are heated and pressurized to be integrally vulcanized. At this time, a vulcanized adhesive is applied to the connecting metal A and the reinforcing metal r1 in contact with the rubber.

  The integrated product thus obtained is fitted into the housing H from above, and the reinforcing metal fitting r1 protruding from the outer periphery of the upper end of the rubber elastic body R is superposed on the step formed on the inner periphery of the upper end of the housing H. At the same time, the orifice plate O and the diaphragm D are fitted into the housing H from above, and the reinforcing metal fitting d1 protruding from the outer periphery of the lower end of the diaphragm D is overlaid on the reinforcing metal fitting r1 of the rubber elastic body R. Then, when the standing wall portion on the outer periphery of the upper end of the housing H is bent to the inner peripheral side and the reinforcing metal fittings r1 and d1 overlapped on the stepped portion are caulked from above, the workpiece W without liquid filling is obtained.

  The method for enclosing the liquid in the workpiece W obtained as described above includes a step of degassing the liquid using the above-described liquid enclosing device, a step of connecting the nozzle 8 to the enclosure hole d2 of the workpiece W, and the nozzle 8, the step of exhausting the air in the liquid chamber w1 through the step 8, the step of supplying the liquid to the liquid chamber w1 after the exhaust, the step of sealing the liquid chamber w1 after filling the liquid, and then the nozzle 8 etc. Recovering the remaining liquid.

-Deaeration process-
First, the process of degassing the liquid will be described. This degassing step is a step of degassing the liquid in the storage tank 31, and is performed alternately in the two storage tanks 31a and 31b in parallel with the exhaust step, the liquid supply step, the sealing step and the recovery step. Is. In the following description, the two storage tanks 31a and 31b are simply referred to as the storage tank 31 without being distinguished from each other, and the electromagnetic on-off valves 38 and 39 are not distinguished from each other unless there is a particular need. It is assumed that the storage tank 31 has already stored the liquid.

  When degassing the liquid in the storage tank 31, first, the electromagnetic opening / closing valve 38 provided on the degassing line 36 is opened, and the negative pressure of the recovery line 60 is adjusted in the storage tank 31 while being adjusted by the vacuum regulator 37. To introduce. All other valves provided in the storage tank 31 are closed.

  When the inside of the storage tank 31 reaches a predetermined vacuum pressure, the electromagnetic opening / closing valve 38 is closed to make the inside of the storage tank 31 a sealed space. In this way, the liquid is deaerated in the sealed storage tank 31 for a predetermined time, and the air dissolved therein is removed, so that bubbles can be prevented from being generated in the liquid after being sealed in the mount M. This is advantageous in ensuring stable vibration performance.

  On the other hand, the connection process, the exhaust process, the liquid supply process, the sealing process, and the recovery process are performed as a series of sequences in this order. First, the operator sets the workpiece W on the holder 3 on the turntable 2 in a state where the turntable 2 is at the lowest position as shown in FIGS. At this time, when the bracket W 1 of the housing H of the workpiece W is set to the front and set in accordance with the protrusions 3 a and 3 a of the holder 3, the workpiece W has a center axis C approximately and the rotation center of the turntable 2. It coincides with the line Z. Then, the switch of the operation panel 16 (see FIG. 1) disposed at the uppermost part of the frame 1 is pressed to operate the liquid sealing device.

-Connection process-
When the liquid sealing apparatus is activated, first, the sensor 10 moves forward and is positioned directly below the nozzle 8, and the distance to the upper surface of the lower workpiece W is measured as shown in FIG. At the same time, the servo motor 40 of the moving mechanism 4 operates to rotate the workpiece W on the rotary table 2 around the central axis C thereof. As a result, when the distance measuring position by the sensor 10 moves in the circumferential direction at a portion near the outer periphery of the upper surface of the diaphragm D and passes through the stepped side edge of the seal surface d3, the output of the sensor 10 changes in a stepped manner. .

  Here, since the side edge portion of the seal surface d3 is longer than the sealing hole d2 and extends in the radial direction of the workpiece W, the workpiece W is set to be slightly inclined, and the sealing hole d2 is set in the radial direction of the workpiece W. Even when the sensor 10 itself is difficult to detect, the side edge of the seal surface d3 can be detected by the sensor 10, and the position of the sealing hole d2 is indirectly detected. be able to.

  The rotary table 2 is rotated by the distance from the side edge of the seal surface d3 thus detected to the center of the sealing hole d2, so that the sealing hole d2 is positioned directly below the sensor 10, that is, directly below the nozzle 8. Then, the sensor 10 is retracted by the operation of the air cylinder 12, and the rotary table 2 is lifted by the operation of the air cylinder 45 of the moving mechanism 4. The nozzle 8 and the pressing rods 9 and 9 are pressed against the lower ends. Thus, the sealing hole d2 of the workpiece W and the nozzle 8 are connected in an airtight manner.

-Exhaust process-
As described above, the slide plate 95 of the supply mechanism 90 moves forward in parallel with the connection of the sealing hole d2 of the workpiece W and the nozzle 8, and one steel ball S is present in the branch hole 24c of the passage forming member 24. Just fall. Then, the rod 93 descends to hermetically seal the opening of the branch hole 24c.

  Thus, the opening of the branch hole 24c is hermetically sealed, and the passages 24a to 24c of the passage forming member 24 communicating with the liquid chamber w1 of the workpiece W and the common passage 20a of the valve unit body 20 are all airtight from the outside. In the shut-off state, the open / close valve 22 of the exhaust line 50 in the valve unit 6 is opened, and the high-pressure vacuum pump 51 of the exhaust line 50 is operated.

  By the operation of the high-pressure vacuum pump 51, the air in the liquid chamber w1 of the workpiece W is sucked (evacuated) while monitoring the vacuum pressure switch 55, and is forcibly exhausted. At this time, air is also discharged from the nozzle 8, the passage forming member 24, and the valve unit 6. For example, when the inside of the liquid chamber w <b> 1 becomes a predetermined high vacuum pressure state, the high-pressure vacuum pump 51 stops and the valve unit 6 closes the open / close valve 22 of the exhaust line 50.

-Liquid supply process-
When air is discharged from the liquid chamber w1 of the workpiece W as described above, the open / close valve 21 of the liquid supply line 30 is opened in the valve unit 6 and the downstream side of the measuring cylinder 80 on the liquid supply line 30 is opened. Open / close valve 82 is opened and the servo cylinder 83 is actuated to make a stroke toward the discharge side. The upstream opening / closing valve 82 is closed.

  Thus, the liquid discharged from the opening / closing valve 82 to the downstream liquid supply line 30 by the stroke of the measuring cylinder 80 flows through the liquid supply line 30 and is supplied to the valve unit 6, and the workpiece is supplied through the nozzle 8. The liquid is supplied into the W liquid chamber w1. At this time, since the inside of the liquid chamber w1 has a negative pressure, the liquid is smoothly supplied and filled into every corner of the liquid chamber w1.

  Further, since the amount of the liquid filled in the liquid chamber w1 is pre-measured by the measuring cylinder 80 as described above, the size of the housing H of the workpiece W and the rubber elastic body R are varied, and when assembling them. Even if there is a variation in the volume of the liquid chamber w1 due to an error, the amount of liquid filling does not vary.

-Sealing process-
When the liquid chamber w1 is filled with the liquid, the valve unit 6 closes the open / close valve 21 of the liquid supply line 30. Further, in the branch passage 24b of the passage forming member 24, the rod 91 inserted therein temporarily advances to the last retracted position and then moves forward to feed the steel ball S to the supply passage 24a, and then the rod 101 descends. Then, the steel ball S is fitted into the sealing hole d2 of the workpiece W through the passage in the nozzle 8.

  At that time, since the inside of the branch path 24b and the supply path 24a through which the steel balls S are sent are filled with liquid, air may be mixed in when the steel balls S are inserted into the sealing holes d2 through the branches. There is no. Further, the liquid pushed out from the sealing hole d2 stays in the nozzle 8, and there is no fear of spilling outside. Of course, there is no possibility that foreign matter in the air is mixed into the sealing liquid.

-Recovery process-
As described above, when the sealing hole d2 is closed by the steel ball S, the liquid chamber w1 is sealed, and the liquid seal mount M is completed, in the valve unit 6, only the open / close valve 23 of the recovery line 60 is opened. Then, since the vacuum pump 61 of the recovery line 60 is always operating, the recovery tank 62 has a negative pressure, and this negative pressure causes the valve unit 6, the passage forming member 24, and the nozzle 8 to remain. The sucked liquid is sucked and collected in the collection tank 62.

  When the preset time has elapsed, the valve unit 6 closes the open / close valve 23 of the recovery line 60. Meanwhile, in the liquid supply line 30, the electromagnetic opening / closing valve 32 of the storage tank 31 that has already been deaerated is opened, and in the measuring cylinder 80, the downstream opening / closing valve 82 is closed, and the upstream opening / closing valve. While 81 is opened, the stroke to the suction side is performed by the operation of the servo cylinder 83, and the liquid corresponding to the stroke is sucked.

  When supplying the liquid from the storage tank 31 that has been deaerated as described above to the measuring cylinder 80, the electromagnetic open / close valve 39 for air communication is opened prior to the opening operation of the electromagnetic open / close valve 32 to store the liquid. The tank 31 is open to the atmosphere.

  When the liquid ring mount M is completed as described above, the rotary table 2 is lowered to the lowest position by the operation of the air cylinder 45 of the moving mechanism 4, and the operator holds the completed mount M on the rotary table 2. 3 can be easily removed. At this time, as described above, since the liquid has already been removed from the inside of the nozzle 8, there is no fear of the liquid dripping from the upper nozzle 8, and there is no need to wipe it off. After removing the completed mount M, the operator sets the next workpiece W on the holder 3 and presses the switch on the operation panel 16 to execute the above steps.

(Function and effect)
Therefore, according to the liquid sealing apparatus of this embodiment, the operator simply sets the work W on the holder 3 on the turntable 2 and presses the switch of the operation panel 16 to the sealing hole d2 of the work W. After the nozzle 8 is connected and the liquid chamber w1 is evacuated through the nozzle 8, the liquid is filled and sealed, and the remaining liquid is automatically recovered as a series of sequences.

  That is, the operator only needs to set the center of the workpiece W on the holder 3 on the rotary table 2, and then the position of the sealing hole 2 of the workpiece W is detected by the sensor 10 and rotated according to this. Since the table 2 is rotated and the process from the alignment to the connection with the upper nozzle 8 is automatically performed, it is possible to prevent a defective connection between the nozzle 8 and the sealing hole d2 due to an artificial setting error.

  In particular, in this embodiment, the sensor 10 does not directly detect the sealing hole d2 of the workpiece W, but detects the side edge portion of the seal surface d3 surrounding the workpiece W. Even if it is done, since the sealing hole d2 can be indirectly detected, an artificial set error can be prevented more reliably.

  In addition, the workpiece W of this embodiment is configured such that an orifice board O and a diaphragm D are caulked and fixed to a main body member made of a housing H and a rubber elastic body R, and an enclosure hole d2 is provided in the diaphragm D. Therefore, if the assembly position of the diaphragm D is shifted, the position of the sealing hole d2 may be largely shifted in the circumferential direction with respect to the upper nozzle 8.

  In this respect, in the liquid sealing device, the sensor 10 is positioned directly below the nozzle 8, and the rotary table 2 is rotated until the position of the sealing port d2 is detected by the sensor 10, so that the sealing is performed as described above. Even if the position of the hole d2 is greatly deviated in the circumferential direction, the position can be reliably detected.

  Conversely, if the liquid sealing apparatus according to the present invention is used, it is possible to eliminate positioning in the circumferential direction when assembling the orifice panel O or the diaphragm D to the main body member of the workpiece W. For example, the structure of the mount M can be simplified and the manufacturing cost can be reduced.

  In addition, this invention is not limited to the structure of the said embodiment, It includes other various structures. That is, in the above-described embodiment, the bracket portion h1 is provided so as to protrude from the outer periphery of the housing H of the workpiece W, but a columnar workpiece that does not have such a protruding portion (that is, has less unevenness) is used. You can also. Even in this case, if the center of the workpiece is set in accordance with the rotation center of the turntable 2, the position of the sealing hole d2 can be detected by the sensor 10 and can be automatically connected to the nozzle 8.

  In other words, even when such a columnar workpiece is used, it is not necessary to provide a protrusion or the like only for positioning to the liquid sealing device, so that there is no unnecessary restriction in the design of the mount M. be able to.

  In the above embodiment, the liquid sealing hole d2 is provided in the diaphragm D assembled to the main body member of the workpiece W. However, the present invention is not limited to this, and the vertical liquid sealing mount M as in the above embodiment is used. The sealing device of the present invention can be applied to other liquid seal mounts.

  Further, in the liquid sealing apparatus of the above embodiment, the sensor 10 is positioned directly below the nozzle 8 and the position of the sealing hole d2 is detected directly below the sensor 8. However, the present invention is not limited thereto, and the rotation center of the rotary table 2 is not limited thereto. The rotary table 2 may be rotated such that the sealing hole d2 is detected at an arbitrary position on the circumference centered on the line Z and the sealing hole d2 is moved directly below the nozzle 8.

  Furthermore, in the liquid sealing apparatus of the embodiment, the position of the side edge of the seal surface d3 surrounding the sealing hole d2 is detected by the sensor 10, but not limited to this, the position of the sealing hole d2 is directly You may make it detect.

  As described above, the present invention can suppress the occurrence of an artificial setting error as much as possible in the liquid sealing device to the liquid seal mount, although the work can be easily set. Is useful.

It is a front view which shows schematic structure of the liquid sealing apparatus of embodiment. (a) is a perspective view which shows the table | surface which set the workpiece | work, and the valve unit above it, (b) is a perspective view from the lower part which shows the position of a nozzle especially. It is a longitudinal cross-sectional view which shows an example of the structure of a liquid seal mount. It is a side view which shows the moving mechanism of a rotary table, and the structure of a sensor. It is a perspective view which shows a mode that the position of the enclosure hole of a workpiece | work is detected with a sensor. It is sectional drawing which shows the structure of supply of a valve unit and a steel ball, and an insertion mechanism. It is the VII-VII sectional view taken on the line of FIG. 6 which shows the structure of a valve unit. It is a system diagram which shows the circuit structure of a liquid supply system.

M Liquid seal mount W Work (mount work)
w1 Liquid chamber C Center axis D of work piece Diaphragm (closing member)
d2 Sealing hole (sealing port)
d3 Seal surface H Housing (mount work body)
R Rubber elastic body (mount work body)
Z Rotation center line 2 of rotation table 3 rotation table 3 holder 4 movement mechanism (rotation movement means, connection movement means)
8 Nozzle 10 Sensor

Claims (4)

A liquid sealing device for liquid seal mounting that seals liquid in a liquid chamber of a mount work,
The mount work has a substantially cylindrical shape, and one end face thereof is provided with a sealing port that opens on a circumference of a predetermined radius around the central axis and communicates with the liquid chamber.
A holder for holding the mount work on the rotary table such that the one end surface is an upper surface and the center axis thereof is substantially the rotation center;
A nozzle spaced apart above the turntable and disposed downward on a circumference of the predetermined radius around the rotation center line;
A sensor for detecting the position of the sealing port on the upper surface of the mount work held by the holder;
Rotational movement means for receiving the signal from the sensor and rotating the rotary table so that the sealing port on the upper surface of the mount work faces the upper nozzle by a motor ;
Connection moving means for moving at least one of the nozzle and the rotary table in the vertical direction so as to be close to each other, and connecting the nozzle to the sealing port of the mount work;
A liquid sealing apparatus for a liquid ring mount, comprising: The sensor for detecting the position of the work inlet is positioned above the rotary table and positioned on the circumference of a predetermined radius around the rotation center line, and detects the position of the inlet facing the lower side. Is provided as
2. The liquid sealing apparatus according to claim 1, wherein the rotation moving unit is configured to rotate the rotary table until the sensor detects the position of the sealing port. A flat seal surface is formed on one end surface of the mount work so as to surround the sealing port and contact the tip of the nozzle.
A side edge portion of the sealing surface extending in the radial direction at the one end surface is formed in a step shape,
The liquid sealing apparatus according to claim 2, wherein the sensor for detecting the position of the sealing port is configured to detect a position of a stepped side edge of the seal surface.   The mount work has a main body member that has a hollow portion that opens toward one end side of the central axis thereof, and a closed body that is attached to the main body member from the one end side and closes the hollow portion to form a liquid chamber. The liquid sealing device according to any one of claims 1 to 3, wherein a sealing port is opened on the closing member.

Images