JP4452516B2 - Metering dispenser - Google Patents

Description

  The present invention relates to a metering distributor that measures a predetermined amount of lubricating oil pumped from an oil supply pump and supplies it to an oil supply location in the field of lubricating oil supply systems.

  For example, in various machine tools such as an injection molding machine, it is necessary to periodically supply lubricating oil so that an operating portion such as a bearing portion does not cause seizure or galling. An example of the lubricating oil supply system is schematically shown in FIG.

  This lubricating oil supply system includes an oil supply pump 1 having a depressurizing means as a basic configuration. A primary side pipe 1a is drawn out from the oil supply pump 1, a fixed quantity distributor 2 is connected to the primary side pipe 1a, and lubricating oil is supplied from the fixed quantity distributor 2 to each oil supply location (not shown) via the secondary side pipe 2a. Is done. Oil or grease is used as the lubricating oil.

  As shown in FIG. 8, the number of metering distributors 2 corresponding to the number of oil supply points are connected to the primary side pipe 1 a, but normally the pressure arrival is the slowest when viewed from the oil pump 1. Is provided with a quantitative distributor 2E having an operation detecting means, thereby ensuring the reliability of the operation.

  An example of a quantitative distributor 2E having this type of motion detection means is disclosed in Patent Document 1. Describing the configuration, the quantitative distributor itself has a cylinder in which a piston is accommodated, and the cylinder chamber is partitioned by the piston into a measuring chamber on the piston head side and a storage chamber on the anti-piston head side.

  The measuring chamber side is connected to the primary side pipe 1a via the lubrication port, and the secondary side pipe 2a is connected to the storage chamber side. In addition, spring means for urging the piston toward the measuring chamber side is housed in the storage chamber. The cylinder is provided with a first passage from the lubrication port to the measuring chamber and a second passage from the lubrication port to the storage chamber. The first passage and the second passage are provided in the lubrication port according to the pressure in the primary side pipe 1a. An umbrella valve made of a rubber material that opens and closes the passage is disposed.

  During operation of the oil supply pump 1, the first passage is opened and the second passage is closed by the umbrella valve, and the lubricating oil in the primary side pipe 1a pushes up the piston against the urging force of the spring means and then enters the measuring chamber. Inflow.

  When the oil pump 1 is depressurized (stopped), the piston is pushed back by the spring means, whereby the umbrella valve is separated from the second passage, and the first passage and the second passage communicate with each other through the oil supply port. Then, the lubricating oil in the measurement chamber is transferred to the storage chamber side.

  As described above, by repeating the operation and depressurization of the oil supply pump 1, a substantially constant amount of lubricating oil measured in the measurement chamber is intermittently supplied to the oil supply location via the storage chamber. In the quantitative distributor described in Patent Document 1, a detection pin extending to the outside of the cylinder is connected to the piston, and an operation signal is obtained by turning on and off the limit switch by the detection pin.

  That is, if the oil pump 1 is operated for a predetermined time and an on signal is obtained during that time, the system is judged to be normal (discharge completed), and if the on signal is not obtained, it is judged to be abnormal. The cause of the abnormality includes, for example, a failure of the oil supply pump 1 itself, clogging or tearing of the primary side pipe 1a, and air mixing into the primary side pipe 1a.

Japanese Patent Application Laid-Open No. 11-280994 (FIGS. 5A to 5D)

By the way, the general specifications of the quantitative distributor are set to a discharge amount of 0.03 to 1.5 cm ³ per one time, a distributor operating pressure of 2.6 MPa, and a distributor return pressure of about 1.2 MPa. Among these, the discharge amount can be adjusted to some extent by the operation time of the pump per time and the number of shots per unit time.

However, as a matter of fact, it is not possible to cope with the entire range of, for example, a discharge amount of 0.03 to 1.5 cm ³ with one model. Once the cylinder volume has been determined, the volume of the measuring chamber is limited to a certain range due to the design. Therefore, to change the discharge amount of the lubricating oil according to the specification change, the cylinder according to the discharge amount It is necessary to redesign all parts including

  Further, the operation detection means has the following problems. The pump pressure is set so that the pressure in the primary side pipe 1a is 2.6 MPa or more during pump operation, and the pressure in the primary side pipe 1a is lowered to 1.2 MPa or less by the depressurization means when the pump is stopped. Thus, the next discharge is normally performed.

  In practice, in consideration of safety margin, a pressure of about 8 MPa is normally set when the oil pump 1 is operated so that a pressure increase of about 6 MPa or more is obtained even at the end of the circuit, and about 0.5 MPa or less when the pressure is released. As the system is operating.

  Therefore, as long as there is no abnormality in the oil pump 1 and the primary side pipe 1a system, when the oil pump 1 is operating, the piston is raised by the lubricating oil being pumped into the measuring chamber with a pressure of 2.6 MPa or more, and the ON signal from the limit switch When the pressure is released, an off signal is obtained from the limit switch due to the lowering of the piston.

  However, when the lubricating oil is a low-viscosity oil, it may be determined that the piston has returned to the initial position by an off signal from the limit switch, but the situation is different for a grease with a high apparent viscosity.

  That is, even if the grease has the same consistency, the apparent viscosity of the grease due to temperature change varies greatly, and the pressure rise time during pump operation and the pressure drop time during decompression vary greatly. In particular, when the pressure is released, the pressure drop time is likely to change because the grease in the primary side pipe 1a is returned to the pump tank by the pushing back force of the piston by the spring means in the distributor.

  In the configuration in which the detection pin is integrally connected to the piston as in the quantitative distributor described in Patent Document 1, an off signal is output from the limit switch immediately after the piston starts to descend during decompression. However, in the case of grease, it cannot be said that the piston returns to the initial position with the off signal. That is, it is not possible to grasp when the piston returns to the initial position.

  Therefore, for example, when the pump is operated manually by switching the system from the automatic operation mode to the manual operation mode for some reason, it is not known when the pump should be started.

  In other words, if the pump is started in a state where the piston has not returned to the initial position, metering is not performed accurately and proper refueling cannot be performed, so whether the piston has returned to the initial position. Need to know.

  Accordingly, an object of the present invention is to reduce the cost by sharing parts in designing a quantitative distributor having different discharge amounts. Another problem is to make it possible to accurately grasp the return state of the piston to the initial position, particularly in the grease dispensing unit.

In order to solve the above-mentioned problem, the invention according to claim 1 is connected between a primary side pipe drawn from an oil supply pump having a depressurization means and a secondary side pipe leading to an oil supply location, and In a metering distributor that measures lubricating oil supplied through a primary side pipe and supplies it to the oil supply point through the secondary side pipe, a cylinder body and a piston housed in a cylinder chamber of the cylinder body An oil supply port for connecting the cylinder chamber to the primary side pipe is formed on one end side of the cylinder body, and a discharge port for connecting the cylinder chamber to the secondary side pipe is formed on the other end side. A sub-chamber is provided in the cylinder chamber with a measuring chamber formed between the piston and the head side of the piston, and a storage chamber of a predetermined capacity communicating with the discharge port on the opposite side of the piston The sub-cylinder includes a first passage from the lubrication port side to the metering chamber, and a second passage from the lubrication port side to the storage chamber. Spring means for urging the piston toward the head side is provided on the storage chamber side, and the first passage and the primary side piping are provided in the oil supply port by the pressure during operation of the oil supply pump. The valve body is arranged to communicate with the first passage and the second passage when the oil pump is depressurized, and the sub-cylinder is replaced with the cylinder chamber of the cylinder body. capable are inserted, and the counter-head side of the piston motion sensing pin extending to the outside through the cylinder body from the storage chamber is coaxially connected Rutotomoni, the head side of the piston is characterized by an auxiliary piston which appears in the metering chamber during metering a same diameter as the operation detection pin is provided.

  According to a second aspect of the present invention, the sub-cylinder includes the first passage and the second passage, and a first cylinder member that forms a measuring chamber between the piston and a head side of the piston; And is divided into a second cylinder member forming the storage chamber.

In the invention according to claim 1 or 2 , the auxiliary piston is integrally formed on the head side of the piston, and a guide hole for the auxiliary piston is formed in the bottom of the measuring chamber. The invention according to claim 3 , and the invention according to claim 4 , characterized in that the auxiliary piston is provided so as to be able to appear and retract in the piston.

According to a fifth aspect of the present invention, an operation detection pin extending from the storage chamber to the outside through the cylinder body is coaxially connected to the opposite head side of the piston via a connecting means. Switch means that is turned on and off by the motion detection pin and pin locking means that temporarily locks the motion detection pin at a switch-on position by a spring elastic force are provided outside the cylinder body. As a connecting means, the movement of the piston is applied to the motion detection pin at a predetermined first height position HU when the piston is raised and below a predetermined second height position HL (HL <HU) when the piston is lowered. Lost motion coupling hand that does not transmit the movement of the piston to the motion detection pin within the range of the first height position HU to the second height position HL. It is characterized in that is used.

According to the first aspect of the present invention, the cylinder body can be used as a common body for each model, and the discharge amount per shot differs by replacing the sub-cylinder inserted into the cylinder chamber. The metering distributor can be manufactured at low cost. In addition, the amount of oil measured in the metering chamber is the same as the amount of oil discharged from the storage chamber as the piston rises, so lubricating oil is discharged from the discharge port all at once without any dripping phenomenon. Can be made.

  According to a second aspect of the present invention, the sub-cylinder is divided into the first cylinder member and the second cylinder member, whereby the first cylinder Only the member side needs to be exchanged together with the piston, and the second cylinder member can be shared for each model. In addition, maintenance is good because disassembly is easy.

According to the fifth aspect of the present invention, when the piston rises above the first height position HU, a discharge completion signal is output from the switch means, and the piston descends below the second height position HL. Since the piston lowering detection signal is output from the switch means at that time, the operation of the piston can be reliably grasped even when grease is used as the lubricating oil.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a cross-sectional view of the quantitative distributor according to the first embodiment of the present invention, FIG. 1B is an enlarged view showing the detection switch, and FIG. 2 is a cross-sectional view showing an operation state example of the quantitative distributor. It is.

  As shown in FIG. 1A, the fixed amount distributor 10A is disposed in a cylinder body 100 as a common body that can be shared by, for example, different models with different discharge amounts, and a cylinder chamber 110 of the cylinder body 100. And a piston 300 is housed in the sub-cylinder 200.

  A connection port 101 to which the primary pipe 1a shown in FIG. 8 is connected is formed on one end side (the lower end side in FIG. 1A) of the cylinder body 100, and the connection port 101 is directed toward the cylinder chamber 110. Lubricated port 102 is provided. In the oil supply port 102, an umbrella-type valve (valve element) 103 made of a rubber material and a coil spring 104 that urges the umbrella-type valve 103 toward the cylinder chamber 110 are housed.

  A discharge port 121 is formed in the side wall on the other end side (the upper end side in FIG. 1A) of the cylinder body 100, and the secondary side pipe 2a shown in FIG. A nipple 122 is fitted. Further, the base 401 of the switch case 400 is fixed to the other end side of the cylinder main body 100 by screws (not shown), and the cylinder chamber 110 is closed by the base 401.

  A detection switch 410 that detects the operation of the piston 300 is housed in the switch case 400. As shown in FIG. 1B, in this example, the microswitch 411 is used as the detection switch 410, but an optical switch having a reed switch or a photocoupler may be used.

  As shown in the enlarged view included in FIG. 1A, the switch case 400 is provided with a lead hole 420 for the cable 412 drawn from the micro switch 411, and the cable 412 passes through the lead pipe 413. It is drawn out from the drawing hole 420 to the outside.

  In this case, it is preferable to form a detent locking portion 421 having a diameter slightly smaller than the outer diameter of the extraction pipe 413 on the inner peripheral surface of the extraction hole 420, and according to this, from the outside of the switch case 400 to the extraction hole 420 By forcibly inserting the drawing pipe 413, the detent stop portion 421 bites the drawing pipe 413, so that the drawing pipe 413 can be securely fixed without using a rubber bush or the like.

  The sub cylinder 200 includes a first cylinder member 210 that forms a measuring chamber A (see FIG. 2) with the head side of the piston 300, and a second cylinder member 220 that forms a storage chamber B on the opposite side of the piston 300. And. The first cylinder member 210 and the second cylinder member 220 are preferably formed separately.

  The first cylinder member 210 is formed with a first passage 211 from the lubrication port 102 to the measuring chamber A and a second passage 212 from the lubrication port 102 to the storage chamber B. The first passage 211 is disposed in the inner diameter region of the skirt portion of the umbrella valve 103, and the second passage 212 is disposed at a position corresponding to the central boss portion of the umbrella valve 103. When the pump is stopped, the umbrella valve 103 is pressed against the first cylinder member 210 by the coil spring 104, and the first passage 211 and the second passage 212 are blocked.

  In this example, the second passage 212 includes a groove passage 212a formed along the side surface of the first cylinder member 210. The groove passage 212a is formed on the cylinder chamber 110 side of the cylinder body 100. Also good. Further, the entire second passage 212 may be formed so as to penetrate the first cylinder member 210 and reach the storage chamber B.

  The second cylinder member 220 is formed in a cup shape including a bottom portion 221 and a cylindrical portion 222, and is inserted into the cylinder chamber 110 of the cylinder body 100 so that the opening side faces the first cylinder member 210. . A compression spring 230 that urges the piston 300 toward the head side is accommodated in the second cylinder member 220. In addition, a communication hole 223 that connects the storage chamber B and the discharge port 121 is formed at a predetermined position of the cylindrical portion 222.

  The piston 300 is connected to an operation detection pin 310 that turns on and off the micro switch 411 as the piston 300 moves up and down. Therefore, through holes 221 a and 401 a are formed in each of the bottom portion 221 of the second cylinder member 220 and the base 401 of the switch case 400 to draw the operation detection pin 310 into the switch case 400.

  Next, the operation of the quantitative distributor 10A will be described with reference to FIG. When the operation of the oil supply pump 1 shown in FIG. 8 is started, the pressure in the primary side pipe 1a is increased and the skirt portion of the umbrella valve 103 is deformed in the diameter reducing direction.

  As a result, the lubrication port 102 and the first passage 211 are in communication with each other, and the lubricating oil flows into the measuring chamber A while pushing up the piston 300 against the urging force of the compression spring 230. As the piston 300 moves up, the lubricating oil stored in the storage chamber B in the previous operation is supplied from the discharge port 121 to the secondary side pipe 2a.

  The motion detection pin 310 turns on the micro switch 411 at the upper limit position of the piston 300, for example. A pump control means (not shown) stops the oil supply pump 1 after a predetermined time after determining that the discharge is completed by an ON signal output from the micro switch 411.

  As a result, the depressurizing means works and the pressure in the primary side pipe 1a decreases, so that the piston 300 is pushed back toward the initial position in FIG. 1A by the compression spring 230, and the umbrella valve 103 is driven by the pressure at that time. Also, the first cylinder member 210 moves away from the biasing force of the coil spring 104.

  As a result, the first passage 211 and the second passage 212 communicate with each other via the oil supply port 102, and the lubricating oil measured in the measuring chamber A is transferred into the storage chamber B to prepare for the next operation. In addition, the micro switch 411 is turned off by the lowering of the operation detection pin 310, and the pump control means recognizes that the operation is normally completed by the off signal.

  As described above, by repeating the operation and stop (depressurization) of the oil supply pump 1, a predetermined amount of lubricating oil is supplied from the fixed amount distributor 10A to the oil supply location. According to the first embodiment, For example, when designing quantitative dispensers having different discharge amounts, for example, at least the cylinder body 110 and the second cylinder member 220 can be shared, so that it is possible to quickly cope with a change in specification and reduce costs.

  By the way, as in the first embodiment shown in FIGS. 1 and 2, when the operation detection pin 310 is provided through the storage chamber B, the amount of oil measured in the measurement chamber A and the piston 300 When comparing the amount of oil discharged from the storage chamber B due to the rise, the amount of oil discharged from the storage chamber B becomes smaller by the volume occupied by the operation detection pin 310.

  This means that when the piston 300 is returned from the upper limit position to the initial position, the oil amount corresponding to the volume occupied by the motion detection pin 310 when the piston 300 reaches the vicinity of the initial position is further discharged. As a result, the entire amount of oil measured in the measuring chamber A is discharged. However, it is not preferable that the oil is discharged in a dripping manner depending on the oil supply location.

  Therefore, a second embodiment in which such a dripping phenomenon is eliminated and the amount of oil measured in the measuring chamber A can be discharged at once will be described with reference to FIGS. 3 (a) and 3 (b). In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The quantitative distributor 10B according to the second embodiment is integrally provided with an auxiliary piston 320 on the head side of the piston 300. The auxiliary piston 320 has the same diameter as the motion detection pin 310 and has an axial length equal to or longer than one stroke of the piston 300, but is not necessarily arranged coaxially with the motion detection pin 310.

  Along with the addition of the auxiliary piston 320, a guide hole 213 is formed in the bottom of the measuring chamber A in which the auxiliary piston 320 is liquid-tightly fitted through, for example, an O-ring. When the guide hole 213 is sealed, the movement of the piston 300 is hindered.

  In order to prevent this, as shown in FIG. 3A, a communication hole 321 is formed from the tip of the auxiliary piston 320 through the piston 300 to the operation detection pin 310, and the communication detection hole 310 is connected to the communication hole. The guide hole 213 is released to the atmosphere using a pipe material connected to the H.321, or the branch hole 321a reaching the storage chamber B is formed in the communication hole 321 as shown in FIG. What is necessary is just to make it the same pressure as the storage chamber B.

  As described above, the auxiliary piston 320 having the same diameter as the motion detection pin 310 is provided on the head side of the piston 300 so that the auxiliary piston 320 appears in the measuring chamber A at the time of measurement. The amount of oil and the amount of oil discharged from the storage chamber B by the rise of the piston 300 become substantially the same, and the dripping discharge phenomenon can be prevented.

  Next, a modification of the second embodiment will be described with reference to FIG. In this modification, the guide piston 213 is not formed on the measuring chamber A side, and the auxiliary piston 330 having the same diameter as the operation detection pin 310 appears in the measuring chamber A during measurement. FIG. 4A shows a state when the piston 300 is weighed, and FIG. 4B shows an initial state of the piston 300.

  In this modification, the auxiliary piston 330 is provided on the head side of the piston 300 so as to appear and retract. That is, a guide hole 331 is formed on the head side of the piston 300, and the auxiliary piston 330 is inserted into the guide hole 331 while being urged toward the bottom side of the measuring chamber A by the coil spring 332. .

  The guide hole 331 is released to the atmosphere through the communication hole 333 as in the case of the guide hole 213 or is in communication with the storage chamber B. In the illustrated example, a cylindrical pipe member with a closed bottom is used for the auxiliary piston 330, but a cylindrical pin member may be used.

  According to this modification, as shown in FIG. 4B, when the piston 300 is in the initial position, the auxiliary piston 330 is buried and hidden in the guide hole 331, but as shown in FIG. In addition, when the lubricating oil flows into the measuring chamber A and the piston 300 rises, the auxiliary piston 330 appears in the measuring chamber A. That is, the auxiliary piston 330 is always pressed against the bottom of the measuring chamber A by the coil spring 332, and only the piston 300 moves up and down.

  Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 5A is a sectional view of a quantitative distributor 10C according to the third embodiment, FIG. 5B is an enlarged view of a main part thereof, and FIGS. 6A and 6B are operation explanatory views. In addition, the same referential mark is attached | subjected to the part considered the same as 1st Embodiment mentioned above, or the same, and the description is abbreviate | omitted.

  The feature of the third embodiment is that, for example, even when grease having a high apparent viscosity is supplied, the movement of the piston 300 from rising to lowering can be reliably detected. Therefore, in the quantitative distributor 10C according to the third embodiment, the piston 300 and the motion detection pin 310 are coupled via the lost motion coupling means 510, and the motion detection pin 310 is switched on with respect to the micro switch 411. And pin locking means 520 for temporarily locking the position.

  In this example, the lost motion connecting means 510 includes a connecting cylinder 511 having a lower end opened and a pin insertion hole 512 at the upper end. The connecting cylinder 511 is fixed to the side opposite to the head of the piston 300 with its opening side down. The motion detection pin 310 is inserted into the pin insertion hole 512, and a stopper 311 having a diameter larger than that of the pin insertion hole 512 is provided at the lower end thereof.

  At the time of actual assembly, the motion detection pin 310 is inserted into the pin insertion hole 512 from the opening side of the connecting cylinder 511, and then the opening side of the connecting cylinder 511 is fixed to the opposite head side of the piston 300. The motion detection pin 310 is held by the connecting cylinder 511 so as to be movable in the axial direction, but the playable movement distance may be arbitrarily determined within the movement stroke range of the piston 300.

  Referring to FIG. 5B, the pin locking means 520 includes a locking groove 521 formed on the motion detection pin 310 side, and a locking ball 522 with the locking groove 521 as a counterpart. . In this example, the locking ball 522 is provided on the base 401 side of the switch case 400.

  That is, the base 401 is provided with a storage hole 523 having a female screw in a part formed so as to be orthogonal to the motion detection pin 310, and a locking ball 522 is provided at the tip of the storage hole 523. A coil spring 525 that urges the locking ball 522 toward the motion detection pin 310 via the piston member 524 is housed in the housing hole 523, and a coil spring is disposed on the rear end side. A male screw 526 capable of adjusting the spring force of 525 is screwed.

  The locking groove 521 is provided at a position that is captured by the locking ball 522 when the operation detection pin 310 is pushed up by the piston 300 to turn on the micro switch 411. In this example, the locking groove 521 is formed in an annular shape along the circumferential direction of the motion detection pin 310, but it is only necessary to be provided at a position facing at least the locking sphere 522. Also good. The pin locking means 520 can also be a locking piece 527 made of a leaf spring material as illustrated in FIG.

  Next, the operation of the third embodiment will be described. First, as shown in FIGS. 5 (a) and 6 (a), when the piston 300 is in the initial position (most lowered position), the motion detection pin 310 is lowered accordingly, but the locking ball 522 is pressed. Therefore, the motion detection pin 310 is stopped at a predetermined height position separated from the piston 300.

  When the oil supply pump 1 is operated in this state, lubricating oil flows from the primary side pipe 1a into the measuring chamber A and the piston 300 is raised. In the ascending process, the piston 300 contacts the motion detection pin 310 and pushes up the motion detection pin 310.

  When the piston 300 reaches the upper limit position (measurement and discharge completion position) HU, as shown in FIG. 6B, the micro switch 411 is turned on by the operation detection pin 310 and the locking ball 522 is locked in the locking groove. The operation detection pin 310 is held in the switch-on position by being fitted in the 521.

  When a switch-on signal is output from the micro switch 411, the operation of the oil supply pump 1 is stopped by a pump control means (not shown) after a certain time, and the pressure in the primary side pipe 1a is lowered by the function of the pressure release means. As a result, the piston 300 is pushed down toward the initial position by the compression spring 230, but the motion detection pin 310 remains held at the switch-on position by the locking ball 522.

  When the piston 300 further descends and reaches a height HL near the initial position, the upper end of the connecting cylinder 511 contacts the stopper 311 of the motion detection pin 310 as shown in FIG. As a result, the locking groove 521 is disengaged from the locking ball 522, and the motion detection pin 310 is lowered together with the piston 300, so that the micro switch 411 is turned off.

  Based on this switch-off signal, the pump control means determines that the piston 300 has been returned to the initial position, and displays that the piston 300 has returned to the initial position using a lamp (not shown). Therefore, according to the third embodiment, it is possible to reliably grasp the movement of the piston 300 even when the lubricating oil to be supplied is a grease having a high apparent viscosity.

  Note that the lost motion connecting means is a connection that operates so as not to give transmission force to the other member within a part of the stroke range of the operating stroke of one member between the members operating in relation to each other. This means includes, for example, a combination of a long hole (slit-like hole) and a pin in addition to the connecting cylinder 511 described above.

Sectional drawing and the partial enlarged view of the fixed quantity distributor which concern on 1st Embodiment of this invention. Sectional drawing explaining the operation state of the fixed quantity distributor of the said 1st Embodiment. Sectional drawing which shows the fixed quantity distributor which concerns on 2nd Embodiment of this invention. The principal part expanded sectional view which shows the modification of the said 2nd Embodiment. Sectional drawing and the partial enlarged view of the fixed quantity distributor which concern on 3rd Embodiment of this invention. Sectional drawing which shows the principal part explaining the operation state of the said 3rd Embodiment. The elements on larger scale which show the modification of the said 3rd Embodiment. The schematic diagram which shows the lubrication system containing a fixed quantity distributor.

Explanation of symbols

10A, 10B, 10C Metering distributor 100 Cylinder body 101 Primary side connection port 102 Lubrication port 103 Umbrella type valve 110 Cylinder chamber 121 Secondary side discharge port 200 Sub cylinder 210 First cylinder member 211 First passage 212 Second passage 220 Second 2 cylinder member 230 compression spring 300 piston 310 motion detection pin 400 switch case 410 detection switch 411 micro switch 510 lost motion connection means 511 connection cylinder 520 pin locking means 521 locking groove 522 locking ball A measuring chamber B storage chamber

Claims (5)

It is connected between the primary side pipe drawn from the oil supply pump having the depressurization means and the secondary side pipe leading to the oil supply location, and the lubricating oil supplied from the oil supply pump through the primary side pipe is measured. In the metering distributor that supplies the oil supply point via the secondary pipe,
A cylinder body and a piston housed in a cylinder chamber of the cylinder body, wherein an oil supply port that connects the cylinder chamber to the primary pipe is formed on one end side of the cylinder body, and the other end side A discharge port for connecting the cylinder chamber to the secondary side pipe is formed, a measuring chamber is formed in the cylinder chamber with the head side of the piston, and the discharge port is communicated with the opposite head side of the piston. A sub-cylinder having a storage chamber of a predetermined capacity is provided, and the sub-cylinder has a first passage from the lubrication port side to the measuring chamber and a second passage from the lubrication port side to the storage chamber. And a spring means for urging the piston toward the head side on the storage chamber side of the sub-cylinder. A valve body that brings the first passage and the primary pipe into communication with each other when the oil pump is in operation, and makes the first passage and the second passage into communication when the oil pump is depressurized. The sub-cylinder is inserted into the cylinder chamber of the cylinder body in a replaceable manner, and the piston is opposed to the head from the storage chamber through the cylinder body. A motion detection pin extending to the same axis is connected coaxially, and an auxiliary piston that has the same diameter as the motion detection pin and appears in the measurement chamber at the time of weighing is provided on the head side of the piston. Quantitative distributor to do.   The sub-cylinder includes the first passage and the second passage, and a first cylinder member that forms a measuring chamber between the piston and the head side of the piston, and a first cylinder that forms the storage chamber on the opposite side of the piston. The metering distributor according to claim 1, which is divided into two cylinder members. 3. The auxiliary piston according to claim 1, wherein the auxiliary piston is integrally formed on a head side of the piston, and a guide hole for the auxiliary piston is formed in a bottom portion of the measuring chamber. Metering dispenser. The quantitative distributor according to any one of claims 1 to 3 , wherein the auxiliary piston is provided so as to be able to appear and retract in the piston. A motion detection pin extending from the storage chamber through the cylinder body to the outside is coaxially connected to the opposite side of the piston through a connecting means, and the operation is provided outside the cylinder body. A switch means that is turned on and off by a detection pin and a pin locking means that temporarily locks the operation detection pin at a switch-on position by a spring elastic force are provided as the connection means when the piston is raised. The movement of the piston is transmitted to the motion detection pin at a predetermined first height position HU at or above and below a predetermined second height position HL (HL <HU) when the piston is lowered. Within the range of the position HU to the second height position HL, lost motion connecting means that does not transmit the movement of the piston to the motion detection pin is used. Dosing device according to any one of claims 1 to 4, wherein.

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