JPH0561467U - Viscous fluid supply pump - Google Patents

Abstract

(57) [Summary] [Structure] The magnetic body 72 mounted on the upper surface of the mounted cartridge 1, and the height of the magnetic body 72 near the cartridge 1 when the inside of the cartridge 1 is substantially empty. Position H
A magnetic sensor 60 which is disposed at the height position H and detects the magnetic force of the magnetic body 72 that has reached the height position H, and a control unit which stops the operation of the pump or issues an alarm based on the detection by the magnetic sensor 60. It is a viscous fluid supply pump provided. [Effect] The inside of the cartridge 1 can be automatically detected, the operation of the geared motor 3, that is, the operation of the pump can be automatically stopped, or an alarm can be issued.
Therefore, it is possible to prevent idling and prevent seizure of the bearing or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention automatically sucks a viscous fluid from a bellows type cartridge containing a viscous fluid such as grease, and relatively in small amounts at high pressure, directly or indirectly via a distribution valve or the like to a lubrication point of an industrial machine or the like. The present invention relates to a viscous fluid supply pump that discharges to the inside of the cartridge, and in particular, it is possible to automatically detect that the viscous fluid in the cartridge becomes almost empty and stop the operation of the pump or issue an alarm. It was done.

[0002]

[Prior art and its problems]

 For example, bellows type cartridges containing grease include those having an allowable mass of 80 g, 200 g and 400 g according to the JIS standard. Other commercially available products include a maximum of about 1 kg. Conventionally, these bellows type cartridges have been used by being attached to a manual type grease gun. When used in a grease gun, it can be visually confirmed that the stored grease is decreasing and the bellows type cartridge is shrinking. No detector was needed to make the determination.

Due to such a background, it was not possible to automatically operate the bellows type cartridge by using it in an electrically operated, pneumatically operated or the like supply pump that operates automatically. This is because unless the grease in the bellows type cartridge can be automatically detected to be almost empty, the supply pump will run dry, resulting in seizure of bearings that are important for operation. Because it does.

[0004]

[The purpose of the device]

 The present invention is a viscous fluid supply pump capable of automatically sucking and discharging the viscous fluid from a bellows type cartridge containing the viscous fluid, and the viscous fluid in the cartridge is automatically emptied. The purpose of the present invention is to provide a product which can detect the operation of the pump and stop the operation of the pump or issue an alarm, thereby preventing the idling and reliably preventing the seizure of the bearing and the like.

[0005]

[Means for achieving the purpose]

 The present invention is a viscous fluid supply pump in which a bellows type cartridge containing a viscous fluid is installed in an upright state, and the viscous fluid is automatically sucked and discharged from the cartridge. The magnetic body to be placed and the magnetic force of the magnetic body placed near the cartridge and at the height position of the magnetic body when the inside of the cartridge becomes substantially empty, and the magnetic body has come to the height position. And a control unit for stopping the operation of the pump or issuing an alarm based on the detection by the magnetic sensor.

[0006]

[Action]

 As the amount of grease contained decreases, the bellows type cartridge shrinks and the magnetic material goes down. When the magnetic material reaches the height where the grease is almost empty, the magnetic sensor detects the magnetic force of the magnetic material, and the control unit stops the pump operation or issues an alarm.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a viscous fluid supply pump of the present invention, and FIG. 2 is a partial sectional view taken along the line II of FIG. Reference numeral 1 is a bellows type cartridge, 2 is a reciprocating plunger pump, and 3 is a geared motor. The cartridge 1 is used by being mounted on the plunger pump 2 in an upright state, and the height direction thereof gradually shrinks as the grease contained therein decreases. The bellows type cartridge 1 in FIGS. 1 and 2 is in a state in which the grease is fully filled. FIG. 3 is a front partial cross-sectional view showing a state in which the grease in the bellows type cartridge 1 is substantially empty and the cartridge 1 is contracted.

A connection structure between the cartridge 1 and the cover 4 and the plunger pump 2 will be described with reference to FIG. 4, which is a partially enlarged view of FIG. The cover 4 is a cylinder whose top is closed. In the plunger pump 2, 21 is a suction port that opens upward, and 22 is a piston that slides back and forth. When the piston 22 reciprocates, a suction force acts on the suction port 21. The suction port 21 communicates at its upper portion with a large-diameter recess 23. An internal thread 23a is formed on the inner surface of the recess 23.

Reference numeral 30 is a mouthpiece that connects the cartridge 1 and the cover 4 to the plunger pump 2. The base 30 includes a disk-shaped main body 31, a convex portion 32 on the lower surface of the main body 31, and a cylindrical flange 33 on the upper surface of the main body 31. Two stages of through holes 34 are formed in the center of the main body 31 and the convex portion 32, 34a is an upper large diameter hole and 34b is a lower small diameter hole. The diameter of the small diameter hole 34b is the same as the diameter of the suction port 21. A male screw 32 a is formed on the outer peripheral surface of the convex portion 32, the convex portion 32 is screwed into the concave portion 23, and the through hole 34 communicates with the suction port 21. 35 is an O-ring. The outer diameter of the flange 33 is equal to the inner diameter of the opening 41 of the cover 4, and the inner diameter is larger than the outer diameter of the cartridge 1. A curved portion 41a that protrudes inward is formed in the opening 41, while a concave portion 33a is formed on the outer peripheral surface of the flange 33. By fitting the curved portion 41a into the concave portion 33a, The cover 4 is fixed to the flange 33, that is, the base 30.

At the lower end of the cartridge 1, an outlet 11 for the grease contained therein is provided. The outlet 11 is a tubular body, and an external thread 11a is formed on the outer peripheral surface thereof. On the other hand, a female screw 134a is formed on the inner peripheral surface of the large diameter hole 34a, and the cartridge 1 is fixed to the mouthpiece 30 by screwing the outlet 11 into the large diameter hole 34a. Reference numeral 51 is a seal member.

As shown in FIG. 3, a flange 36 formed by extending a part of the main body 31 is provided on one side (right side in FIG. 3) of the base 30, and the flange 36 is provided upright. The magnetic sensor 60 is provided via the arm 37. On the other hand, as shown in FIG. 2, on the upper surface of the cartridge 1, a disk-shaped washer 71 and a ring-shaped magnetic body 72 are placed in an overlapping manner. As shown in FIG. 5, the washer 71 has a central portion cut and raised, and a small hole 71b is formed in the cut and raised piece 71a. One end of a rope (long body) 82 having a predetermined length is connected to the hole 71b via a ring 81. The rope 82 passes through the hole 72a of the magnetic body 72, passes through the through hole 42 formed at the top of the cover 4, and goes out to the outside, so that the rope 82 hangs down. At the other end of the rope 82, a ring (stop member) 83 serving as a weight is attached. The ring 83 is larger than the through hole 42. As shown in FIG. 3, the rope 82 is set to a length such that the ring 83 is outside the cover 4 even when the grease in the cartridge 1 is almost empty and the cartridge 1 is contracted. ..

The magnetic sensor 60 is provided with a lead switch 61 which is turned on when the magnetic force of the magnetic body 72 is detected. As shown in FIG. 3, the grease in the cartridge 1 becomes almost empty. It is provided at a height position approximately equal to the height position H of the magnetic body 72 when the cartridge 1 is contracted, and is set to detect the magnetic force of the magnetic body 72 when the magnetic body 72 comes to that height position. Has been done. Reference numeral 62 is a lead wire connected to a control unit (not shown). The control unit is configured to stop the operation of the geared motor 3 or issue an alarm when it receives a signal that the reed switch 61 is turned on.

Next, the operation will be described. As shown in FIG. 1 and FIG. 2, when the geared motor 3 is actuated when the cartridge 1 filled with grease is mounted on the plunger pump 2 in a standing state and the cover 4 is further mounted, the piston 1 22 reciprocates, and the grease in the cartridge 1 is discharged from the discharge port (not shown) of the plunger pump 2 through the outlet 11 and the suction port 21. As the grease in the cartridge 1 decreases, the cartridge 1 gradually contracts in the height direction, and when the grease becomes almost empty, the cartridge 1 contracts to the state shown in FIG. As the cartridge 1 shrinks, the height position of the magnetic body 72 also decreases, and when the grease becomes almost empty, the position becomes H in FIG. When the magnetic body 72 reaches the H position, the lead switch 61 of the magnetic sensor 60 detects the magnetic force of the magnetic body 72 and turns on, and a signal is sent to the control unit via the lead wire 62, and the control unit causes the geared motor 3 to move. Stop working or give an alarm. The rope 82 is pulled into the cover 4 as the magnetic body 72 is lowered. The ring 83 moves upward, but it is outside the cover 4 even when the magnetic body 72 reaches the H position.

As described above, in the viscous fluid supply pump configured as described above, the fact that the grease in the cartridge 1 is almost empty is automatically detected by the combination of the magnetic body 72 and the magnetic sensor 60, and the operation of the geared motor 3 is started. Is automatically stopped or an alarm is activated. Therefore, idling can be prevented and seizure does not occur on the bearing or the like. Further, by visually observing the change in the length of the rope 82 exposed from the cover 4 to the outside, it is possible to estimate how much the grease in the cartridge 1 is reduced. In addition, the washer 71 and the magnetic body 72 urge the cartridge 1 downward due to its weight, and thus serve to help discharge of grease from the outlet 11, that is, suction of grease by the suction port 21.

The cartridge 1 in which the grease is almost empty is replaced with the cartridge 1 in which the grease is full as follows. That is, in the state shown in FIG. 3, first, the cover 4 is moved to the left and right to release the fitting between the curved portion 41a and the concave portion 33a, and the cover 4 is removed from the flange 33 of the base 30. Next, the cover 4 is separated from the cartridge 1 together with the washer 71 and the magnetic body 72 that are suspended from the rope 82. Next, the cartridge 1 is rotated to unscrew the outlet 11 and the large diameter hole 34a, and then the cartridge 30 is immediately removed from the plunger pump 2. Next, the cartridge 1 filled with grease is screwed into the outlet 11 and the large-diameter hole 34a by rotating the cartridge 1 to be mounted on the mouthpiece 30, that is, the plunger pump 2. Then, while the washer 71 and the magnetic body 72 are positioned above the cover 4 by pulling the rope 82 while holding the ring 83, the cover 4 is moved together with the washer 71 and the magnetic body 72 onto the cartridge 1, While lowering the cover 4 while placing the washer 71 and the magnetic body 72 on the upper surface of the cartridge 1, by moving the cover 4 left and right, the bent portion 41a and the recessed portion 33a are fitted to each other and the flange 33 of the base 30 is fitted. Install. This completes the replacement work.

In the above replacement work, when the cover 4 is moved together with the washer 71 and the magnetic body 72, the ring 83 is larger than the through hole 42, so that the entire rope 82 does not enter the cover 4. Absent. Therefore, the washer 71 and the magnetic body 72 are moved together with the cover 4 while being accommodated in the cover 4. Therefore, when the cover 4 is attached after the cartridge 1 is replaced, the washer 71 and the magnetic body 72 are easily placed on the upper surface of the cartridge 1.

[0017]

[Another embodiment]

 As shown in FIG. 6, the magnetic sensor 60 may be directly fixed to the cover 4 with a band 91 or the like.

Further, the magnetic sensor 60 is not limited to the one having the reed switch 61 as long as it detects the magnetic force of the magnetic body 72 and sends a signal to the control unit, and it may be one using a Hall element or the like. May be.

Further, instead of the rope 82, a chain or the like may be used as long as it is an elongated flexible member. Further, if there is a space above, a rod body 92 as shown in FIG. 7 may be installed upright. Of course, a spherical body (stop member) 93 is provided on the upper end of the rod body 92.

Further, the base 30 may be formed integrally with the plunger pump 2.

[0021]

[Effect of the device]

 As described above, the viscous fluid supply pump of the present invention has a magnetic body 72 mounted on the upper surface of the mounted cartridge 1 and a magnetic body when the inside of the cartridge 1 is almost empty near the cartridge 1. The magnetic sensor 60, which is disposed at the height position H of the body 72 and detects the magnetic force of the magnetic body 72 that has reached the height position H, stops the operation of the pump or issues an alarm based on the detection by the magnetic sensor 60. Since it is equipped with a control unit that emits, it can automatically detect that the cartridge 1 is almost empty, can automatically stop the operation of the geared motor 3, that is, the operation of the pump, or issue an alarm. You can Therefore, it is possible to prevent idling and prevent seizure of the bearing or the like.

Further, the viscous fluid supply pump of the present invention includes the cover 4 for covering the mounted cartridge 1, and the magnetic body 72 has a rope that is exposed to the outside through the through hole 42 formed in the cover 4. One end of the (long body) 82 is connected via a washer 71, and the rope 82 is exposed to the outside from the cover 4 even if the magnetic body 72 is lowered to a height position H where the inside of the cartridge 1 is substantially empty. Since the exposed portion has a ring (stop member) 83 larger than the through hole 42, the following effects can be obtained. (1) By visually observing the change in the length of the rope 82 exposed from the cover 4 to the outside, it is possible to estimate how much the grease in the cartridge 1 is reduced. (2) The weight of the washer 71 and the magnetic body 72 can urge the cartridge 1 downward to promote the discharge of grease (viscous fluid) from the outlet 11, that is, the suction of the grease by the suction port 21. .. (3) Since the ring 83 is larger than the through hole 42, the entire rope 82 does not enter the cover 4. Therefore, the washer 71 and the magnetic body 72 can be moved together with the cover 4 while being housed in the cover 4. Therefore, when the cover 4 is mounted after the cartridge 1 is replaced, the washer 71 and the magnetic body 7 can be attached. 2 can be easily placed on the upper surface of the cartridge 1.

[Brief description of drawings]

FIG. 1 is a front view showing a viscous fluid supply pump of the present invention.

FIG. 2 is a partial cross-sectional view taken along arrow II of FIG.

FIG. 3 is a partial front sectional view showing an operating state of the viscous fluid supply pump of the present invention.

FIG. 4 is a partially enlarged sectional view of FIG.

FIG. 5 is an enlarged perspective view of a washer.

FIG. 6 is a front view showing another example of the viscous fluid supply pump of the present invention.

FIG. 7 is a front view showing still another example of the viscous fluid supply pump of the present invention.

[Explanation of symbols]

 1 Bellows Type Cartridge 2 Plunger Pump 4 Cover 42 Through Hole 60 Magnetic Sensor 72 Magnetic Material 82 Rope 83 Ring 92 Rod 93 Sphere

Claims (2)

[Scope of utility model registration request] 1. A viscous fluid supply pump in which a bellows type cartridge containing a viscous fluid is mounted in an upright state, and the viscous fluid is automatically sucked and discharged from the cartridge. The magnetic body to be placed and the magnetic force of the magnetic body which is arranged in the vicinity of the cartridge and at the height position of the magnetic body when the inside of the cartridge becomes substantially empty, A viscous fluid supply pump comprising a magnetic sensor for detecting, and a control unit for stopping the operation of the pump or issuing an alarm based on the detection by the magnetic sensor. 2. A cover for covering the mounted cartridge is provided, and one end of a long body exposed to the outside through a through hole formed in the cover is connected to the magnetic body. The stopper has a length such that the magnetic body is exposed to the outside even if the magnetic body is lowered to a height position where the inside of the cartridge is substantially empty, and the exposed portion has a stopper member larger than the through hole. The viscous fluid supply pump according to claim 1, further comprising: