JP2543030Y2 - Viscous fluid supply pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for automatically sucking a viscous fluid from a bellows type cartridge containing a viscous fluid such as grease or the like, and relatively little by little at a high pressure to a lubricating point of an industrial machine or the like. The present invention relates to a viscous fluid supply pump that discharges indirectly via a distribution valve or the like, and in particular, automatically detects that the viscous fluid in the cartridge is almost empty, and stops the operation of the pump or issues an alarm. Or to be able to do so.

[0002]

2. Description of the Related Art For example, bellows type cartridges containing grease include those having allowable masses of 80 g, 200 g and 400 g according to JIS standards. Other commercially available products include those having a maximum of about 1 kg. Conventionally, these bellows type cartridges have been generally used by being attached to a manual grease gun.
When used in a grease gun, it is automatically determined that the grease in the bellows-type cartridge is almost empty because the amount of grease contained is reduced and the bellows-type cartridge shrinks visually. No detection device was required to perform the measurement.

[0003] Due to such a background, it has not been possible to automatically operate a bellows type cartridge by using an automatically operated electric or pneumatic type supply pump. This is because if the grease in the bellows type cartridge is not automatically detected to be almost empty, the supply pump runs idle, causing a problem that a bearing or the like which is important for operation is burned. It is.

[0004]

The object of the present invention is to provide a viscous fluid supply pump capable of automatically sucking and discharging a viscous fluid from a bellows type cartridge containing a viscous fluid, wherein the viscous fluid in the cartridge becomes substantially empty. The purpose of the present invention is to provide a pump that can automatically detect the occurrence of a failure and stop the operation of the pump or issue an alarm, thereby preventing idle running and reliably preventing seizure of bearings and the like. I do.

[0005]

According to the present invention, a bellows type cartridge containing a viscous fluid is mounted in an upright state,
A viscous fluid supply pump for automatically sucking and discharging a viscous fluid from the cartridge, wherein a magnetic body mounted on an upper surface of the mounted cartridge and a substantially empty space near the cartridge and inside the cartridge. And a magnetic sensor for detecting the magnetic force of the magnetic body that has reached the height position, and stopping the operation of the pump based on the detection by the magnetic sensor. And a control unit for issuing an alarm.

[0006]

[Action] As the amount of grease contained decreases, the bellows-type cartridge shrinks, and the magnetic material lowers.
When the magnetic body reaches the height position where the grease is almost empty, the magnetic sensor detects the magnetic force of the magnetic body, and the control unit stops the operation of the pump or issues an alarm.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the viscous fluid supply pump of the present invention,
FIG. 2 is a partial sectional view taken along the arrow II in FIG. 1 is a bellows type cartridge, 2 is a reciprocating plunger pump, and 3 is a geared motor. Cartridge 1 is plunger pump 2
The grease is used while being mounted in an upright state, and the height direction gradually shrinks as the amount of grease contained therein decreases. The bellows type cartridge 1 in FIGS. 1 and 2 is in a state in which the grease is fully stored. FIG.
FIG. 4 is a partial front sectional view showing a state in which the grease in the bellows type cartridge 1 is almost empty and the cartridge 1 is contracted.

Based on FIG. 4 which is a partially enlarged view of FIG. 3,
The connection structure between the cartridge 1 and the cover 4 and the plunger pump 2 will be described. The cover 4 is a tubular body whose upper part is closed. In the plunger pump 2, reference numeral 21 denotes a suction port opened upward, and reference numeral 22 denotes a reciprocating piston. When the piston 22 reciprocates, a suction force is applied to the suction port 21. The suction port 21 communicates with a large-diameter recess 23 at an upper portion thereof. A female screw 23 a is formed on the inner surface of the concave portion 23.

Reference numeral 30 denotes a base for connecting the cartridge 1 and the cover 4 to the plunger pump 2. Base 30
Are a disk-shaped main body 31 and 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. A two-stage through hole 34 is formed at the center of the main body 31 and the convex portion 32.
34a are upper large-diameter holes, and 34b are lower small-diameter holes. The diameter of the small diameter hole 34b is the suction port 2
It is the same as the diameter of 1. A male screw 32 is provided on the outer peripheral surface of the convex portion 32.
a is formed, the convex portion 32 is screwed into the concave portion 23, and the through hole 34 communicates with the suction port 21. 3
5 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. The opening 41 has a curved portion 41 projecting inward.
a on the other hand, a concave portion 33a is formed on the outer peripheral surface of the flange 33, and the curved portion 41a is formed in 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, there is provided an outlet 11 for the contained grease. Exit 11
Is a cylindrical body, and an external thread 11a is formed on the outer peripheral surface. On the other hand, an internal thread 134a is provided on the inner peripheral surface of the large diameter hole 34a.
The cartridge 1 is fixed to the base 30 by screwing the outlet 11 into the large-diameter hole 34a. 51 is a seal member.

As shown in FIG. 3, on one side (the right side in FIG. 3) of the base 30, there is provided a flange 36 in which a part of the main body 31 extends. A magnetic sensor 60 is provided via the arm 37 provided. On the other hand, as shown in FIG. 2, a disc-shaped washer 71 and a ring-shaped magnetic body 72 are placed on the upper surface of the cartridge 1 in an overlapping manner. As shown in FIG. 5, the center of the washer 71 is cut and raised, and a small hole 71b is formed in the cut and raised piece 71a. One end of a rope (elongated body) 82 having a predetermined length is connected to the hole 71 b via a ring 81. The rope 82 is a hole 72 a of the magnetic body 72.
Through the through-hole 42 formed at the top of the cover 4 to the outside and hang down. Rope 82
A ring (stop member) 83 serving as a weight is attached to the other end. The ring 83 is larger than the through hole 42. As shown in FIG. 3, the length of the rope 82 is set 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 in a contracted state. .

By the way, the magnetic sensor 60 is provided with a magnetic material 7.
The reed switch 61 is turned on when the magnetic force of the cartridge 2 is detected. As shown in FIG. 3, the height of the magnetic body 72 when the grease in the cartridge 1 becomes substantially empty and the cartridge 1 shrinks. It is provided at a height position substantially equal to the position H, and is set so as to detect the magnetic force of the magnetic body 72 when the magnetic body 72 comes to the height position. 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 receiving a signal indicating that the reed switch 61 is turned on.

Next, the operation will be described. As shown in FIGS. 1 and 2, when the cartridge 1 fully filled with grease is mounted on the plunger pump 2 in an upright state and the geared motor 3 is operated with the cover 4 attached, the piston 22 Reciprocates, and the grease in the cartridge 1 flows through the outlet 11 through the suction port 21.
And is discharged from a discharge port (not shown) of the plunger pump 2. As the grease in the cartridge 1 decreases, the height of the cartridge 1 shrinks gradually, and when the grease becomes almost empty, the cartridge 1 shrinks 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 is almost empty, the position becomes H in FIG. When the magnetic body 72 comes to the H position, the reed switch 61 of the magnetic sensor 60 detects the magnetic force of the magnetic body 72 and turns on, a signal is sent to the control unit via the lead wire 62, and the geared motor 3 is controlled by the control unit. Is stopped or an alarm is issued. The rope 82 is drawn into the cover 4 as the magnetic body 72 goes down. The ring 83 moves upward, but is outside the cover 4 even when the magnetic body 72 comes to the H position.

As described above, in the viscous fluid supply pump having the above structure, 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 issued. Therefore, idling can be prevented, and seizure does not occur on bearings and the like. By visually observing the change in the length of the rope 82 exposed to the outside from the cover 4, it is possible to determine how much grease in the cartridge 1 has been reduced. Further, the washer 71 and the magnetic body 72 may
Is acted to assist the discharge of the grease from the outlet 11, that is, the suction of the grease by the suction port 21.

Cartridge 1 with almost empty grease
Is replaced with a cartridge 1 full of grease as follows. That is, in the state of FIG.
Is moved left and right to form a curved portion 41a and a concave portion 33a.
Is released 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 suspended from the rope 82.
Next, the cartridge 1 is unscrewed from the outlet 11 and the large-diameter hole 34a by rotating, and the cartridge 1 is removed from the base 30, that is, the plunger pump 2. Next, by rotating the cartridge 1 filled with grease, the outlet 11 and the large-diameter hole 34a are threadedly fitted, and the cartridge 1 is mounted on the base 30, that is, the plunger pump 2. And, holding the ring 83, the rope 8
The cover 4 is moved together with the washer 71 and the magnetic body 72 onto the cartridge 1 while the washer 71 and the magnetic body 72 are positioned above the inside of the cover 4 by pulling the washer 2, and the washer 71 and the magnetic body 72 are moved to the cartridge 1. The cover 4 is lowered while being placed on the upper surface of the base 30, and the cover 4 is moved right and left so that the curved portion 41 a and the concave portion 33 a are fitted to each other and attached to the flange 33 of the base 30. This ends the replacement work.

In the above replacement work, the cover 4 is
1 and the magnetic body 72, the ring 83 is larger than the through hole 42,
All of 2 does not enter the cover 4. For this reason, the washer 71 and the magnetic body 72 are moved together with the cover 4 while being accommodated in the cover 4. Therefore,
After replacing the cartridge 1, when attaching the cover 4, 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 by a band 91 or the like.

The magnetic sensor 60 is not limited to the one provided with the reed switch 61 but may be one using a Hall element or the like as long as it detects the magnetic force of the magnetic body 72 and sends a signal to the control unit. You may.

In place of the rope 82, a chain or the like may be used as long as it is an elongated flexible member. If there is a space above, a bar 92 as shown in FIG. 7 may be used upright. Of course, a sphere (stop member) 93 is provided at the upper end of the rod 92.

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

[0021]

As described above, in the viscous fluid supply pump of the present invention, the magnetic body 72 mounted on the upper surface of the mounted cartridge 1 and the vicinity of the cartridge 1 and the interior of the cartridge 1 become substantially empty. A magnetic sensor 60 that is disposed at the height position H of the magnetic body 72 when the magnetic body 72 has reached the height position H and detects the magnetic force of the magnetic body 72 that has reached the height position H, and stops the operation of the pump based on the detection by the magnetic sensor 60 Since the control unit is provided with a control unit that makes the cartridge 1 empty, the operation of the geared motor 3, that is, the operation of the pump can be automatically stopped, or an alarm can be generated. Can be issued. Therefore, idling can be prevented, and seizure of bearings can be prevented.

Further, the viscous fluid supply pump of the present invention includes a cover 4 for covering the mounted cartridge 1, and the magnetic body 72 has a rope (long) exposed to the outside through a through hole 42 formed in the cover 4. One end of the length body 82 is connected via a washer 71, and the rope 82 is exposed to the outside from the cover 4 even when the magnetic body 72 is lowered to a height position H at which the inside of the cartridge 1 becomes substantially empty. It has such a length, and a ring (stop member) 83 larger than the through-hole 42 is provided in the exposed portion, so that the following effects are obtained. (1) By visually observing a change in the length of the rope 82 exposed from the cover 4 to the outside, it is possible to give an indication as to how much grease in the cartridge 1 has been reduced. (2) The weight of the washer 71 and the magnetic body 72 urges the cartridge 1 downward, thereby facilitating 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 are covered with the cover 4.
Therefore, the washer 71 and the magnetic body 72 can be easily mounted on the upper surface of the cartridge 1 when the cover 4 is mounted after the cartridge 1 is replaced after the cartridge 1 is replaced.

[Brief description of the drawings]

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

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

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

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

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]

 DESCRIPTION OF SYMBOLS 1 Bellows type cartridge 2 Plunger pump 4 Cover 42 Through hole 60 Magnetic sensor 72 Magnetic body 82 Rope 83 Ring 92 Rod body 93 Sphere

Claims (2)

(57) [Scope of request for utility model registration] 1. A viscous fluid supply pump for mounting a bellows type cartridge containing a viscous fluid in an upright state, and automatically sucking and discharging the viscous fluid from the cartridge, wherein the pump is provided on an upper surface of the mounted cartridge. A magnetic body to be mounted, and is disposed at a height position of the magnetic body when the inside of the cartridge is substantially empty near the cartridge, and the magnetic force of the magnetic body that has reached the height position is 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. A cover for covering the mounted cartridge; one end of a long body exposed to the outside through a through hole formed in the cover is connected to the magnetic body; A stopper member having a length such that the magnetic body is exposed to the outside from the cover 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. 2. The viscous fluid supply pump according to claim 1, further comprising: