JP4767112B2 - Liquid sealing device for liquid ring mount and method for manufacturing liquid ring mount - Google Patents

Description

  The present invention relates to the manufacture of a liquid ring mount, and more particularly, to a method for enclosing a liquid in a liquid chamber of a mount work and an apparatus used therefor.

  2. Description of the Related Art Conventionally, a liquid seal mount in which a liquid is sealed is widely used as an automobile engine mount. 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 forcibly evacuated by suction with a vacuum pump or the like, and then liquid is sealed.

  That is, for example, in the device described in Patent Document 1, a nozzle of a liquid filling tube is inserted into an opening (enclosure) communicating with a liquid chamber of a mount work, and air in the liquid chamber is firstly passed through this nozzle by a vacuum pump. Aspirate. Then, after confirming that the air has been sufficiently discharged by a vacuum gauge or the like, the liquid filling pipe is communicated with the liquid supply pipe (liquid supply line), and the liquid supplied from the liquid supply pipe is discharged to every corner of the liquid chamber by negative pressure. Fill up to. Thereafter, the nozzle is extracted from the opening, and a ball (sealing member) is press-fitted therein and sealed.

  However, after filling the liquid chamber with the liquid and then removing the nozzle from the sealing port and press-fitting the ball, the liquid pushed out from the sealing port by this ball spills and adheres to the metal part of the workpiece There is a concern of generating rust. On the other hand, if the amount of the liquid is small so as not to spill, air may be mixed into the liquid chamber when the ball is press-fitted.

  In addition, after removing the nozzle from the workpiece inlet as described above, connecting the press-fitting machine to the inlet and driving the ball into it, it takes time to remove the nozzle and connect the press-fitting machine. Since it remains open, it is conceivable that foreign substances in the air may enter the liquid chamber, and there is a concern that the anti-vibration performance may be reduced.

On the other hand, for example, in the vibration isolator (mount) of Patent Document 2, the sealing port communicating with the liquid chamber has a bifurcated hole, and a pin (sealing member) is inserted halfway into one branch hole. Keep it closed. Then, a nozzle is connected to the other branch hole, the air in the liquid chamber is discharged in the same manner as described above, and after filling the liquid, the pin is pushed into the end without removing the nozzle to seal the sealing port. I am doing so.
Japanese Patent Laid-Open No. 2-25307 Japanese Patent Laid-Open No. 4-282042

  However, in the latter conventional example (Patent Document 2), the structure of the bifurcated enclosure is complicated, and the part on the mount where such an enclosure can be formed is limited. This will cause unnecessary restrictions on both sides of the production, and may increase the cost.

  In addition, since one branch hole of the sealing port is closed with a pin inserted halfway, sufficient airtightness is required to evacuate from the other branch hole. In addition, a new preparation step for press-fitting the pin into the sealing port using required equipment is required, which also increases the cost.

  The present invention has been made in view of such various points, and the object of the present invention is to prevent air and foreign matter from being mixed in after the liquid has been sealed without increasing the cost of the liquid ring mount. In addition to ensuring stable anti-vibration performance, it is also possible to prevent the spilled liquid.

  In order to achieve the above object, in the present invention, after the air in the liquid chamber is discharged and filled with the liquid via the nozzle connected to the sealing port of the mount work as in the prior art, the liquid is filled through the nozzle. The sealing member was fitted into the sealing port.

That is, the invention of claim 1 is a liquid sealing device for liquid seal mounting that seals liquid in a liquid chamber of a mount work, and is disposed upward on a table on which the mount work is placed, and the mount work A nozzle that is hermetically connected to a sealing port that communicates with the liquid chamber, an exhaust line for discharging air from the liquid chamber of the mount work, and a liquid supplied to the liquid chamber after the exhaust A switching valve that is connected to a liquid supply line for switching, an intermediate member that is provided between the nozzle and the switching valve and has a supply / discharge passage for exhaust and liquid supply to the liquid chamber, and a supply of the intermediate member A supply means for supplying a sealing member for sealing the sealing port of the mount work into the discharge passage, and a sealing member supplied into the supply / discharge passage by the supply means are sealed via the nozzle. Fits at the entrance It includes a fitting means to put the said the liquid supply line is assumed to pressurizing means for pressurizing the liquid to be supplied is arranged.

  When a liquid is sealed in the liquid chamber of the mount work by the liquid sealing device having the above-described configuration, first, a nozzle is hermetically connected to the sealing port communicating with the liquid chamber, and the nozzle is exhausted by a switching valve via an intermediate member. Connected to the line, the air in the liquid chamber is discharged. Thereafter, when the switching valve switches and connects the nozzle to the liquid supply line, the liquid supplied from the liquid supply line flows through the supply / discharge passage of the intermediate member and the passage in the nozzle, and the liquid after the exhaust is discharged. Filled indoors.

  Then, after the liquid chamber of the mount work is filled with the liquid, the sealing member supplied into the supply / discharge passage of the intermediate member by the supply means is fitted into the sealing port via the nozzle by the fitting means. . At this time, the sealing member passes through the supply / discharge passage filled with the liquid and is fitted into the sealing port of the mount work, so that air is not mixed at that time.

  Further, since the nozzle is not removed until the sealing port is sealed by the sealing member, the liquid pushed out from the sealing port by the sealing member may remain in the nozzle and the intermediate member and spill outside. Absent. Of course, there is no possibility that foreign matter in the air is mixed into the liquid.

  Moreover, the structure of the sealing port is not complicated as in the latter conventional example (Patent Document 2) described above, and there is no unnecessary restriction in the design and manufacture of the mount. A preparatory process for inserting a sealing member such as a pin is not necessary, and it is not necessary to increase the dimensional accuracy of the sealing port or the sealing member, so that the cost is not increased.

  In addition, once the nozzle is connected to the mount work set in the apparatus as described above, it is not necessary to remove the nozzle until the work is completed by filling the liquid chamber of the work with the liquid. Also excellent.

  In other words, the workability during manufacturing can be improved without incurring an increase in the cost of the liquid seal mount, and air and foreign matters are prevented from being mixed in after the liquid is sealed, so that the vibration proof performance is stably secured. Furthermore, it is possible to prevent spillage of the encapsulated liquid and to prevent the metal parts from being rusted.

More preferably, the nozzle is disposed upward on the mounting work table, and the liquid supply line is provided with a pressurizing means for pressurizing the liquid to be supplied. Can be increased.

In other words, when the nozzle is once removed from the sealing port after supplying the liquid as in the past, set the work so that the sealing port is always upward, and connect the nozzle to the sealing port from above. I have to do it. However, since the nozzle is normally fixed on the apparatus side, the operator needs to set the work accurately so that the sealing port is located directly under the nozzle, and this alignment is difficult.

On the other hand, if the nozzle is arranged upward on the mounting table as described above, and the workpiece is aligned with the nozzle with the sealing port facing down as opposed to the prior art, the operator can place the nozzle on the mounting table. It is only necessary to place the work so that the sealing port matches the nozzle, and the positioning can be done easily.

In such a case, the liquid must be supplied upward to the liquid chamber of the upside-down mount work, but this liquid is pressurized by the pressurizing means of the liquid supply line, and the liquid chamber is negative. Combined with the pressure, it fills every corner.

In addition, if the liquid chamber is sealed after the liquid is filled, the liquid in the nozzle flows down due to gravity and returns to the intermediate member and the switching valve. It is also possible to prevent liquid from spilling.

  Preferably, in the liquid sealing apparatus having the above-described configuration, the intermediate member is provided with a communication path that opens to the outside while communicating with the supply / discharge path, and the supply unit includes an opening / closing mechanism that opens and closes the opening of the communication path; And a feeding mechanism that feeds the sealing members one by one in synchronism with the opening / closing operation and introduces the sealing members into the supply / discharge passage via the communication passage (invention of claim 2).

  Further, the fitting means may be provided with a long pressing member capable of moving forward and backward from the supply / discharge passage of the intermediate member to the passage in the nozzle, and a drive mechanism for moving the pressing member back and forth. Item 3).

More preferably, a dedicated recovery line for sucking and recovering the liquid remaining in the nozzle and the intermediate member is provided. In this case, the nozzle and the intermediate member are connected to the exhaust line and the supply by the switching valve. It becomes the structure switched and connected to any one of a liquid line or the said collection lines (invention of Claim 4 ). In this configuration, by sucking and collecting the liquid remaining in the nozzle and the intermediate member, it is possible to prevent air and foreign matter from being mixed into the liquid to be reused, and liquid is spilled from the nozzle removed from the workpiece. This can be prevented more reliably.

From another viewpoint, the invention of claim 5 of the present application is a method of manufacturing a liquid seal mount by enclosing a liquid in a liquid chamber of the mount work , the mount work being placed on a table on which the mount work is placed, the mounting filling port facing downward in communication with the liquid chamber of the workpiece so as to mate the nozzles upward and arranged on said platform is placed, connected before Kifu inlet nozzle airtightly through the nozzle Then, after the air in the liquid chamber is discharged, the liquid is pressurized and supplied thereto , and a sealing member is fitted into the sealing port via the nozzle. This method can be easily executed by, for example, the manufacturing apparatus according to the first aspect of the present invention.

  As described above, according to the liquid sealing device and the sealing method for a liquid seal mount according to the present invention, after the air in the liquid chamber is discharged through the nozzle connected to the mounting port of the mount work and filled with the liquid By inserting the sealing member into the sealing port through the nozzle, workability can be improved without incurring an increase in cost, and air and foreign matters can be mixed after the liquid is sealed. By preventing it, the anti-vibration performance can be ensured stably, and furthermore, by preventing the spilled liquid, the occurrence of rust can be suppressed.

  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.

-Overall configuration-
1 to 6 show an embodiment of a liquid sealing apparatus according to the present invention. This liquid sealing apparatus is provided in a liquid chamber w1 of a work W (mount work) of an engine mount that is separately created by vulcanization integrated molding. It is for enclosing a liquid. FIG. 1 schematically shows the configuration of the apparatus as viewed from the front, and a table 2 (mounting table) for mounting a workpiece W is disposed at a substantially central portion in the vertical direction of the main body frame 1. Yes. The table 2 is disposed at a height of the operator's waist so that the workpiece W can be easily set, and is attached to the top plate 3a of the base 3 so as to be spaced apart upward.

  A holding jig 4 for holding the workpiece W upside down is disposed at a substantially central portion of the upper surface of the table 2 as shown in an enlarged view in FIG. On the other hand, as shown in FIG. 2B, a U-shaped holding jig 5 that opens downward is disposed above the holding jig 4 and is moved up and down by the air cylinder 6. ing. The air cylinder 6 is disposed in an inverted state on a support plate 7 that extends forward from the upper portion of the frame 1, and a rod 5 a that protrudes from the lower end of the air cylinder 6 extends downward through the support plate 7.

  In addition, guide cylinders 8 and 8 are disposed in the left and right sides of the air cylinder 6 so as to penetrate the support plate 7 and extend up and down, respectively. A rectangular plate member 9 (hereinafter referred to as a crosshead) is installed. The lower end of the rod 5a of the air cylinder 6 is connected to a substantially central portion of the upper surface of the cross head 9, and when the air cylinder 6 is operated, the cross head 9 is guided by the left and right guide cylinders 8 and 8 and is parallel in the vertical direction. Will move.

  Thus, the holding jig 5 is attached to the lower surface of the cross head 9 that moves up and down. The holding jig 5 descends together with the cross head 9 to hold the work W set on the holding jig 4 of the lower table 2. wear. As shown in FIGS. 2A and 4, the holding jig 4 is formed with an upward hemispherical protrusion 4 a, and an engine mount diaphragm D (shown only in FIG. 3) which is a workpiece W. Pressing inward (upward in this example), the volume of the liquid chamber w1 is set to a predetermined amount.

-Structure of mount M-
Here, as shown in FIG. 3, for example, the engine mount M that is the workpiece W includes a flat cylindrical metal case C integrally formed with a bracket portion c1 connected to the engine side by a bolt or the like, A connection fitting B disposed on the lower inner peripheral side of the case C and connected to a vehicle body frame and the like, and a rubber elastic body R for connecting the case C and the connection fitting B to each other are provided. The connection fitting B is formed in an approximately L shape, and a hemispherical bulging portion b1 is formed on the upper portion thereof.

  The rubber elastic body R is formed in a conical shape constricted downward so as to connect the lower inner periphery of the case C and the outer periphery of the bulging portion b1 of the connecting bracket B to each other. It has a hollow portion r1 that opens. An orifice panel O and a rubber diaphragm D are fitted into the upper inner periphery of the case C from above so as to close the opening above the hollow portion r1. A portion near the outer periphery of the diaphragm D is formed thick and covers the entire outer periphery of the orifice plate O, and a metal reinforcing member d1 is embedded therein.

  Thus, the opening is closed by the diaphragm D, and the hollow portion r1 of the rubber elastic body R is a liquid chamber w1 in which a liquid is sealed as described later (hereinafter referred to as a liquid chamber w1). This liquid chamber w1 Is divided into a lower main liquid chamber and an upper sub liquid chamber by the orifice plate O. 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.

  In order to appropriately obtain such attenuation due to the flow resistance of the liquid, it is necessary to prevent the pressure in the liquid chamber w1 from becoming excessively high even in a state where the static load of the engine or the like is supported (1G state). As shown in the drawing, the liquid must be sealed in the workpiece W with the central portion of the diaphragm D immersed inward. Therefore, when the liquid is sealed, the workpiece W is pressed against the holding jig 4 as described above, and the diaphragm D is pressed inward by the hemispherical convex portion 4a.

  Further, as shown in the drawing, an enclosure hole d2 (enclosure opening) that penetrates in the thickness direction (vertical direction) and whose lower end communicates with the liquid chamber w1 through the orifice o1 is formed in a portion near the outer periphery of the diaphragm D. ing. A spherically enlarged diameter portion is provided at the substantially central portion of the sealing hole d2, and as will be described in detail later, a steel ball S (sealing member) is fitted therein, whereby the sealing hole d2 is closed. It has come to be.

-Nozzle and valve unit-
When the liquid is sealed in the workpiece W as described above, the workpiece W is set upside down on the holding jig 4 and pressed from above by the pressing jig 5 as described above. At this time, as shown in FIG. 2 (a), the nozzle 10 that opens upward facing the upper surface of the holding jig 4 is airtightly connected to the sealing hole d2 that opens to the lower part of the workpiece W that is upside down (see FIG. 2). 4 (shown by phantom lines), exhaust and liquid supply are performed through the nozzle 10.

  As shown in FIG. 4, the nozzle 10 vertically penetrates the holding jig 4, and a valve unit 12 disposed below the table 2 via an intermediate member 11 disposed on the table 2. It is connected to the. The intermediate member 11 has a rectangular block shape, and a supply / discharge passage 11a is formed in the intermediate member 11 so as to extend in the vertical direction so as to communicate the passage in the nozzle 10 and the port of the valve unit 12. In addition, although the branch path 11b for supplying the steel ball S there is connected to the supply / discharge passage 11a, this will be described later.

  The valve unit 12 has a rectangular block-shaped valve body 20, and four open / close valves 21 a, 21 b, 22, and 23 are arranged in a cross shape as viewed from above as shown in FIG. 5. And the upper end of the central common channel | path 24 surrounded by them opens to the upper surface of the boss | hub part 20a protrudingly provided by the upper surface of the valve body 20, and is made into a common exit port. Air cylinders 71a, 71b, 72, 73 projecting from the valve body 20 are integrally connected to the open / close valves 21a, 21b, 22, 23, respectively, so that the spool is moved to open and close. It has become.

  In FIG. 5, open / close valves 21a and 21b positioned on the lower side and the left side are connected to liquid supply lines 31a and 31b for supplying liquid to the liquid chamber w1, and the open / close valve 22 positioned on the upper side of the work W An open / close valve 23 located on the right side is connected to an exhaust line 50 for exhausting air from the liquid chamber w1 and connected to a recovery line 60 for recovering liquid remaining in the nozzle 10 and the intermediate member 11. . That is, the valve unit 12 constitutes a switching valve that connects the nozzle 10 by switching to one of the liquid supply lines 31a and 31b, 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. First, the liquid supply lines 31a and 31b are provided with two storage tanks 32a and 32b for storing the liquid while degassing, and the liquid supply lines 31a and 31b are respectively provided below the storage tanks 32a and 32b. Opening and closing valves 33a and 33b for opening and closing are provided. Further, drain valves 34a and 34b are also provided below the storage tanks 32a and 32b, and an upstream liquid supply line 35 for replenishing liquid from a liquid replenishing device (not shown) is provided with an electromagnetic opening / closing valve 36a. , 36b.

  On the other hand, above the storage tanks 32a and 32b, atmospheric communication lines 37a and 37b communicating with the atmosphere, a deaeration line 40 communicating with the low pressure vacuum pump 41, and a pressure line communicating with an air supply line 80 described later. 45 is connected. Electromagnetic switching valves 38a and 38b are provided in the atmosphere communication lines 37a and 37b, respectively, and electromagnetic switching valves 44a, 44b, 47a and 47b are provided in the deaeration line 40 and the pressurization line 45, respectively.

  That is, a relatively low-pressure vacuum pump 41 is connected to the deaeration line 40 as described above, and a vacuum regulator 42 and a vacuum gauge 43 are connected between the vacuum pump 41 and the storage tanks 32a and 32b. Further, electromagnetic open / close valves 44a and 44b are provided on lines branched immediately before the storage tanks 32a and 32b, respectively. The deaeration line 40 is for sucking air in the storage tanks 32a and 32b by the vacuum pump 41 and degassing the liquid stored in the storage tanks 32a and 32b.

  The pressurizing line 45 is a pressurizing means for pressurizing the liquid when supplying the liquid to the valve unit 12 through the liquid supply lines 31a and 31b, and communicates with the air supply line 80 as described above. In addition, a regulator 46 is provided downstream thereof, and electromagnetic open / close valves 47a and 47b are provided respectively in the pressurization lines 45a and 45b branched downstream thereof. The pressurization line 45 originally adjusts the pressure of the air supplied for the operation of the air cylinder by the regulator 46 to pressurize the storage tanks 32a and 32b.

  The exhaust line 50 is for sucking (evacuating) air from the liquid chamber w1 of the workpiece W before liquid supply, and is connected to a high-pressure vacuum pump 51 from there to the valve unit 12. A separation tank 52 and a vacuum pressure switch 53 are interposed in this order. The separation tank 52 is for separating gas and liquid, and an open valve 54 is attached to the upper part thereof, and a drain valve 55 is attached to the lower part thereof. The vacuum pressure switch 53 is used to monitor the pressure in the liquid chamber w1 to be evacuated.

  Further, the collection line 60 is for sucking and collecting the liquid remaining in the nozzle 10 and the intermediate member 11 after the liquid supply, and is connected to a vacuum pump 61 for sucking the liquid. 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 37, and an open valve 63 is attached to the upper part thereof, and a drain valve 64 is attached to the lower part thereof.

  Any one of the four liquid supply lines 31 a and 31 b, the exhaust line 50, and the recovery line 60 is selectively connected to the nozzle 10 by the valve unit 12. That is, if the opening / closing valves 21a, 21b of the valve unit 12 are opened, the liquid supply lines 31a, 31b are connected to the nozzle 10, the exhaust line 50 is opened if the opening / closing valve 22 is opened, and the opening / closing valve 23 is opened. A collection line 60 is connected to the nozzle 10.

  Air cylinders 71a, 71b, 72, 73 for driving the four on-off valves 21a, 21b, 22, 23, respectively, are connected to an air supply line 80 via electromagnetic switching valves 81a, 81b, 82, 83, The air supply line 80 is supplied with high-pressure air from an air supply device (not shown) via a filter / regulator 84.

  The air supply line 80 also supplies high-pressure air to the air cylinder 6 that moves the holding jig 5 up and down via an electromagnetic switching valve 85. Although not shown in FIG. High-pressure air is supplied to the air cylinders 92, 94, 96 (see FIG. 4) of the steel ball S supply mechanism 90 described below via an electromagnetic switching valve (not shown), and the steel ball S is sealed with the workpiece W. High pressure air is supplied via an electromagnetic switching valve 86 to the air cylinder 102 of the fitting mechanism 100 fitted into the hole d2.

-Steel ball supply and insertion mechanism-
Next, referring to FIG. 4 again, the mechanisms 90 and 100 for supplying the steel ball S to the supply / discharge passage 11a of the intermediate member 11 connected to the nozzle 10 and fitting the steel ball S into the sealing hole d2 of the workpiece W will be described. . As shown in the drawing, the intermediate member 11 is formed with a branch path 11b that branches from the middle of the supply / discharge passage 11a extending vertically and extends linearly toward the rear of the apparatus (rightward in the figure). A branch hole 11c is formed so as to branch from the middle of the branch path 11b and open upward on the upper surface of the intermediate member 11. The branch path 11b and the branch hole 11c form a communication path that opens to the outside while communicating with the supply / discharge path 11a.

  The branch path 11b extends to the rear surface of the intermediate member 11 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 the air cylinder 92. The tip of the rod 91 is located slightly behind the branch hole 11c in the most retracted position, and the branch hole 11c. The steel ball S can be moved to the supply / discharge passage 11a through the branch path 11b if it moves forward while being driven by the air cylinder 92.

  On the other hand, the branch hole 11c opened on the upper surface of the intermediate member 11 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 11c and sealing it airtightly, if it retreats (rises) by a predetermined amount, the opening of the branch hole 11c is opened and the entry of the steel ball S is not hindered.

  Further, a slide plate 95 is arranged on the upper surface of the intermediate member 11 so as to slide back and forth, and a round hole 95a capable of accommodating only one steel ball S penetrates in the thickness direction at the front part thereof. On the other hand, the rear end portion of the slide plate 95 is connected to an air cylinder 96, and is thereby driven forward and backward 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 11c that opens on the upper surface of the lower intermediate member 11, while the slide plate 95 moves upward as described below. The steel ball S supplied from is accepted.

  That is, the fixed plate 13 is overlaid on the slide plate 95 and is attached to the intermediate member 11 on both the left and right sides of the slide plate 95. The flexible tube 15 is attached via the connector 14 so as to communicate with the round hole 95a from above. In this tube 15, steel balls S are accommodated in a daisy chain, and the steel balls S are supplied to the round holes 95 a of the slide plate 95 at the last retracted position one by one through the passage in the connector 14. It is supposed to be.

  If the slide plate 95 is moved to the most advanced position by the operation of the air cylinder 96 in a state in which the supplied steel ball S is accommodated in the round hole 95a, the steel ball in the round hole 95a is moved. S falls into the branch hole 11c that opens downward, reaches the branch path 11b, and then is sent to the supply / discharge passage 11a by the rod 91 as described above. Then, the steel balls S sent to the supply / discharge passage 11a fall in the supply / discharge passage 11a and enter the common passage 24 from the port opened to the boss portion 20a of the valve body 20, and as shown in the drawing, the common passage S It stops at the step portion formed inside 24.

  As described above, the supply mechanism 90 for supplying the steel balls S one by one into the supply / discharge passage 11a includes the rod 93 and the air cylinder 94 as an opening / closing mechanism for opening / closing the opening of the branch hole 11c, and is synchronized with the opening / closing operation. As a feed mechanism that feeds the steel balls S and introduces them one by one to the supply / discharge passage 11a, a rod 91, an air cylinder 92, a slide plate 95, and an air cylinder 96 are provided.

  Then, the steel balls S supplied into the supply / discharge passage 11a by the supply mechanism 90 and stopped in the common passage 24 of the valve body 20 are then pushed up by the rod 101 (pressing member), and then supplied / discharge passage 11a. And the passage in the nozzle 10 so as to be fitted into the sealing hole d2 of the workpiece W. That is, in the valve body 20, the common passage 24 has an upper end communicating with the supply / discharge passage 11 a of the intermediate member 11, and a lower end opened on the lower surface of the valve body 20. It is inserted in an airtight state.

  The rod 101 is provided such that its upper end is advanced and retracted from the common passage 24 through the supply / discharge passage 11a to the passage in the nozzle 10, while its lower end is connected to the air cylinder 102 (drive mechanism). The air cylinder 102 is driven to move forward and backward in the longitudinal direction (up and down direction), and at the most retracted (downward) position, the tip of the rod 101 has four open / close valves 21a, 21b, and 22 , 23 are located slightly below the mutual communication site (lower than the stationary site of the steel ball S).

  When the rod 101 moves forward (ascends) when driven by the air cylinder 102, the upper end pushes up the steel ball S, passes through the passage in the nozzle 10 from the supply / discharge passage 11a, and enters the sealing hole d2 of the workpiece W. It comes to fit. That is, the rod 101 and the air cylinder 102 constitute a fitting mechanism 100 that fits the steel ball S into the sealing hole d2 through the nozzle 10.

(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 B and the case C are set in a mold, and a predetermined amount of the rubber elastic body R and the rubber layer are formed. The unvulcanized rubber composition is also set in a mold, and these are heated and pressurized to be integrally vulcanized. At this time, a vulcanizing adhesive is applied to the connection fitting B and the case C at the contact portion with the rubber. The orifice board O and the rubber diaphragm D are fitted into the upper inner periphery of the case C in the integrally formed product thus obtained to constitute a workpiece W without liquid filling.

  The method of enclosing the liquid in the workpiece W configured as described above includes the step of degassing the liquid, the step of exhausting the air in the liquid chamber w1 of the workpiece W, and the A step of supplying the liquid to the liquid chamber w1, a step of sealing the liquid chamber w1 after the liquid is filled, and a step of recovering the liquid remaining in the nozzle 10 and the like thereafter.

-Deaeration process-
First, the process of degassing the liquid will be described. This deaeration process is a process for degassing the liquid in the storage tank 32, and is performed alternately in the two storage tanks 32a and 32b in parallel with the exhaust process, the liquid supply process, the sealing process and the recovery process. Is. In the following description, the two storage tanks 32a and 32b are simply referred to as the storage tank 32 without being distinguished from each other. In addition, it is assumed that the liquid is already stored in the storage tank 32.

  When the liquid in the storage tank 32 is deaerated, the electromagnetic opening / closing valve 44 provided on the deaeration line 40 is opened, the vacuum pump 41 is operated, and the pressure in the storage tank 32 is monitored by the vacuum gauge 43. However, the pressure in the storage tank 32 is lowered. At this time, all other valves provided in the storage tank 32 are closed.

  If the inside of the storage tank 32 reaches a predetermined vacuum pressure, the liquid is degassed in the storage tank 32 for a predetermined time, and the air dissolved therein is removed, and after being sealed in the mount M It is possible to prevent the generation of bubbles in the liquid, which is advantageous in ensuring stable vibration isolation performance.

  On the other hand, 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 work W upside down and on the holding jig 4 on the table 2 in a state where the holding jig 5 is separated upward as shown in FIGS. At this time, the operator may place the workpiece W so that the sealing hole d2 fits with the nozzle 10 opening upward on the holding jig 4 as a guide. Then, a switch on the operation panel 16 (see FIG. 1) disposed on the uppermost part of the apparatus frame 1 is pressed to operate the liquid sealing apparatus.

-Exhaust process-
When the liquid sealing apparatus is operated, first, the holding jig 5 is lowered by the operation of the air cylinder 6, and comes into contact with the connection fitting B located at the upper part of the work W in the upside down direction, and is pressed from above. Then, the sealing hole d2 that opens at the lower portion of the workpiece W facing upside down is airtightly connected to the nozzle 10 as shown in FIG. Further, after the slide plate 95 of the supply mechanism 90 moves forward and only one steel ball S falls into the branch hole 11c of the intermediate member 11, the rod 93 descends to hermetically seal the opening of the branch hole 11c. .

  Thus, in the state where the supply / discharge passage 11a of the intermediate member 11 communicating with the liquid chamber w1 of the workpiece W via the nozzle 10 and the common passage 24 in the valve unit 12 are shut off from the outside, the exhaust in the valve unit 12 is exhausted. Only the open / close valve 22 of the line 50 is opened. The high-pressure vacuum pump 51 in the exhaust line 50 is always operated.

  By opening the opening / closing valve 22, the air in the liquid chamber w1 of the workpiece W is sucked (evacuated) while monitoring the vacuum pressure switch 53, and is forcibly exhausted. At this time, air is also discharged from the nozzle 10, the intermediate member 11, and the valve unit 12. For example, when the inside of the liquid chamber w <b> 1 is in a predetermined high vacuum pressure state, the valve unit 12 closes the opening / closing valve 22 of the exhaust line 50.

-Liquid supply process-
If air is discharged from the liquid chamber w1 of the workpiece W as described above, the valve unit 12 opens the open / close valve 21 of the liquid supply line 31 connected to the storage tank 32 that has already been deaerated. (Following the storage tank 32, the liquid supply lines 31a and 31b, the open / close valves 21a and 21b, etc. will be described without distinction). Prior to that, in the storage tank 32, first, the open / close valve 44 of the deaeration line 40 is closed, and the open / close valve 38 on the atmosphere communication line 37 is opened to temporarily release the atmosphere, then it is closed and the pressurization line 45 is closed. The upper opening / closing valve 47 is opened to pressurize the inside of the tank.

  In this state, the liquid in the storage tank 32 is supplied to the valve unit 12 through the liquid supply line 31 and supplied to the liquid chamber w <b> 1 of the workpiece W through the nozzle 10. At this time, liquid is supplied upward from below to the liquid chamber w1 of the workpiece W upside down. As described above, the inside of the storage tank 32 is pressurized, while the inside of the liquid chamber w1 is negative. Since the pressure is maintained, the liquid is smoothly supplied and filled in every corner of the liquid chamber w1.

-Sealing process-
When the liquid chamber w1 is filled with the liquid, the valve unit 12 closes the open / close valve 21 of the liquid supply line 31. In addition, in the branch path 11b of the intermediate member 11, the rod 91 of the supply mechanism 90 inserted therein advances, feeds the steel balls S to the supply / discharge passage 11a, and then the rod 101 of the insertion mechanism 100 rises. Then, the steel ball S is fitted into the sealing hole d2 of the workpiece W through the supply / discharge passage 11a and the passage in the nozzle 10 and closed.

  Thus, since the inside of the branch passage 11b and the supply / discharge passage 11a through which the steel ball S is sent is filled with liquid, air may be mixed in when the steel ball S is inserted into the sealing hole d2 through the branch passage 11b. There is no. Moreover, the liquid pushed out from the sealing hole d2 with the insertion of the steel ball S stays in the nozzle 10 and the intermediate member 11, 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-
When the sealing hole d2 is closed as described above, the liquid chamber w1 is sealed, and the liquid sealing mount M is completed, only the opening / closing valve 23 of the recovery line 60 is opened in the valve unit 12. Then, since the vacuum pump 61 of the recovery line 60 is always operating, the recovery tank 62 has a negative pressure, and the negative pressure causes the valve unit 12, the intermediate member 11, and the nozzle 10 to remain. The liquid being sucked is collected and collected in the collection tank 62.

  When a preset time has elapsed, the valve unit 12 closes the open / close valve 23 of the recovery line 60. In addition, the holding jig 5 is raised by the operation of the air cylinder 6, and the operator can remove the completed mount M from the holding jig 4 on the table 2.

  Even if the mount M is removed, the liquid has already been recovered from the inside of the nozzle 10 as described above, and the liquid is also removed from the vicinity of the sealing hole d2 to which the nozzle 10 was connected. There is no worry of spilled liquid adhering to the mount M, and there is no need to wipe it off. After removing the completed mount M, the operator sets the next workpiece W on the holding jig 4 and pushes the switch on the operation panel 16, and the steps of exhaust, liquid supply, sealing and recovery described above are filled with liquid. What is necessary is just to perform with an apparatus.

(Function and effect)
Therefore, according to the liquid sealing apparatus of this embodiment, the air in the liquid chamber w1 is exhausted through the nozzle 10 connected in an airtight manner to the sealing hole d2 of the workpiece W set in the holding jig 4, and then Since the steel ball S is inserted into the sealing hole d2 through the nozzle 10 after the liquid is filled, air or foreign matter is placed in the liquid chamber w1 between the time when the liquid is sealed and the time when the steel ball S is sealed. There is no risk of contamination, and there is no risk of liquid spilling outside.

  In particular, in this embodiment, before removing the nozzle 10 from the workpiece W, the liquid remaining in the nozzle 10 and the intermediate member 11 is sucked and collected, so that even after the completed mount M is removed, Spilled liquid does not adhere to the mount M. Moreover, no air or foreign matter is mixed into the liquid that is recovered and reused.

  Furthermore, just by setting the workpiece W in the liquid sealing device as described above and pressing the switch on the operation panel 16, the liquid chamber w1 of the workpiece W is evacuated, filled with liquid, sealed, and the remaining Even the liquid recovery is automatically performed as a series of sequences, and in this embodiment, since the workpiece W is turned upside down, it is easy to set the sealing hole d2 in accordance with the nozzle 10. It can be said that workability is very high.

  And it is not necessary to make the enclosure hole d2 of the mount M (work W) have a complicated structure as in the conventional example (Patent Document 2), and there is no unnecessary restriction in the design and manufacture of the mount M. It is not necessary to insert a sealing member such as a pin into the sealing hole d2 in advance, and it is not necessary to increase the dimensional accuracy of the steel ball S that is the sealing hole d2 or the sealing member, thereby preventing an increase in cost. be able to.

  In other words, the workability during manufacturing can be improved without incurring an increase in the cost of the liquid seal mount M, and air and foreign matter can be prevented from being mixed in after the liquid has been sealed, thereby ensuring stable vibration isolation performance. Furthermore, it is possible to prevent spillage of the encapsulated liquid and prevent rust from occurring on the metal part.

(Other embodiments)
In addition, this invention is not limited to the structure of the said embodiment, It includes other various structures. That is, although the recovery line 60 is provided in the liquid sealing apparatus of the embodiment, this is not always necessary. When the nozzle 10 is provided upward as in the above-described embodiment, when the supply of the liquid to the workpiece W is completed, the liquid in the nozzle 10 is caused to flow down by gravity and returned to the intermediate member 11 or the valve unit 12. It is also possible to drain from there or return to the liquid supply line 31.

  Moreover, in the said embodiment, although the valve unit 12 shall be provided with the four opening-and-closing valves 21a, 21b, 22, and 23, this can also be comprised with 1-3 valves.

  Further, in the above embodiment, two storage tanks 32 are provided in the liquid sealing apparatus, but this may be one. Further, it is not essential to deaerate the inside of the storage tank 32, and it is not always necessary to pressurize when supplying the liquid.

  In the above-described embodiment, the vertical liquid ring mount M is shown as an example. However, the present invention is not particularly limited thereto, and the sealing device and method of the present invention can be applied to other liquid ring mounts.

  As described above, the present invention is useful because it can improve the workability at the time of manufacture without incurring the cost increase of the liquid seal mount, and can stably ensure the performance. .

It is a front view which shows schematic structure of the liquid sealing apparatus of embodiment. It is a perspective view which shows the jig | tool etc. on the table which sets a workpiece | work, (a) shows before the setting of a workpiece | work, (b) shows after the setting, respectively. It is a longitudinal cross-sectional view which shows an example of the structure of a liquid seal mount. It is sectional drawing which shows the structure of a nozzle, a valve unit, etc. as a principal part of a liquid sealing apparatus. FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4 showing the configuration of the valve unit. It is a system diagram which shows the circuit structure of a liquid supply system.

M Liquid seal mount S Steel ball (sealing member)
W Work (Mount Work)
w1 Liquid chamber d2 Enclosure hole (enclosure port)
2 Table (mounting table)
4 Holding jig 10 Nozzle 11 Intermediate member 11a Supply / discharge passage 11b Branch passage (communication passage)
11c Branch hole (communication path)
12 Valve unit (switching valve)
31 Liquid supply line 32 Storage tank (pressurizing means)
45 Pressurizing line (pressurizing means)
50 Exhaust line 60 Collection line 90 Supply mechanism (supply means)
91 Rod (feed mechanism)
92 Air cylinder (feed mechanism)
93 Rod (Opening / closing mechanism)
94 Air cylinder (opening / closing mechanism)
95 Slide plate (feed mechanism)
96 Air cylinder (feed mechanism)
100 Insertion mechanism (insertion means)
101 Rod (Pressing member)
102 Air cylinder (drive mechanism)

Claims (5)

A liquid sealing device for liquid seal mounting that seals liquid in a liquid chamber of a mount work,
A nozzle that is disposed upward on a table on which the mount work is placed, and is hermetically connected to a sealing port that communicates with a liquid chamber of the mount work;
A switching valve for switching and connecting the nozzle to an exhaust line for discharging air from the liquid chamber of the mount work and a liquid supply line for supplying liquid to the liquid chamber after the exhaust;
An intermediate member provided between the nozzle and the switching valve and having a supply / discharge passage for exhausting and supplying liquid to the liquid chamber;
Supply means for supplying a sealing member for sealing the sealing port of the mount work into the supply / discharge passage of the intermediate member;
Fitting means for fitting the sealing member supplied into the supply / discharge passage by the supply means into the sealing port via the nozzle ;
A liquid sealing device for a liquid seal mount, wherein the liquid supply line is provided with pressurizing means for pressurizing a liquid to be supplied . The intermediate member is provided with a communication path that opens to the outside while communicating with the supply / discharge path.
The supply means includes an opening / closing mechanism that opens and closes the opening of the communication path, and a feeding mechanism that sends the sealing member one by one in synchronization with the opening / closing operation and introduces the sealing member into the supply / discharge path via the communication path. The liquid sealing apparatus according to claim 1, wherein:   The insertion means includes a long pressing member capable of moving back and forth from a supply / discharge passage of the intermediate member to a passage in the nozzle, and a drive mechanism for moving the pressing member back and forth. The liquid sealing apparatus according to either 1 or 2. A collection line for sucking and collecting the liquid remaining in the nozzle and the intermediate member is provided,
Switching valve, the nozzle and the intermediate member, the exhaust line, claim 1-3, characterized in that it is configured to connect to switch to one of the supply fluid line or the return line The liquid sealing apparatus according to one. A method for producing a liquid seal mount by enclosing a liquid in a liquid chamber of a mount work,
The mount work is placed on a table on which the mount work is placed so that the downwardly sealed inlet communicating with the liquid chamber of the mount work is aligned with the nozzle disposed upward on the table,
Before connecting the nozzle hermetically Kifu inlet,
A liquid seal mount characterized in that after the air in the liquid chamber is discharged through the nozzle, the liquid is pressurized and supplied thereto, and a sealing member is fitted into the sealing port through the nozzle. Manufacturing method.

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