JP3489126B2 - Grease pump drop lid device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grease pump for sucking grease from inside a grease can by a suction pipe and discharging the grease to the outside. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drop lid device used to reduce the amount of grease remaining in a grease can without being discharged by flattening an upper surface of a grease that falls. 2. Description of the Related Art Conventionally, as the above-mentioned drop lid device, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 3-110298. A grease pump using the drop lid device penetrates a ceiling 13 of a housing 12 containing a grease can 10 as shown in FIG.
Is inserted into the grease can 10, the cylinder pump in the suction pipe 14 is operated by operating the lever 16, and the grease 26 is discharged to the outside via the hose 18. The drop lid device 22 is formed in a relatively thin disk shape having a hole 24 having a diameter slightly smaller than that of the grease can 10 and a diameter slightly larger than that of the suction pipe 14 at the center thereof. The suction pipe 14 is inserted through the inside 24, and the drop lid device 22 is in contact with the upper surface of the grease 26. The drop lid device 22 drops the top surface of the grease 26 to keep the lid device 22 flat at all times and to prevent the grease 26 from adhering to the wall surface of the grease can 10, so that a large amount of grease 26 that cannot be discharged can be removed. 10 is to be prevented from remaining. [0004] However, in the drop lid device 22, since the diameter of the hole 24 is larger than the diameter of the suction pipe 14, a gap is formed between the two. As shown by the dotted line in FIG. 2, the distance from the gap between the hole 24 and the suction pipe 14 to the suction port at the lower end of the suction pipe 14 is the gap between the peripheral edge of the drop lid device 22 and the peripheral wall of the grease can 10. Is shorter than the distance from the lower end of the suction pipe to the suction port. Therefore, the grease 26 is mainly sucked through the gap between the hole 24 and the suction pipe 14, and the peripheral portion of the drop lid device 22 and the grease can 10
Although the grease 26 remains on the peripheral wall portion, the probability of sucking air together with the grease 26 from the gap between the hole 24 in which the grease 26 is reduced and the suction pipe 14 is higher than the rate of sucking the grease 26, There has been a problem that ejection failure is likely to occur. In the drop lid device 22, the suction port of the grease 26 is located at the center of the grease can 10, but since the grease 26 is sucked from a portion that is easy to flow, only a part of the peripheral edge of the drop lid device 22 is used. May be inhaled. In such a case, the drop lid device 22
Is guided by the part around the hole 24,
Since the thickness of this portion is relatively thin, the drop lid device 22 itself becomes oblique as shown in FIG.
, The dropping of the drop lid device 22 is hindered, and the function of flattening the upper surface of the grease 26 is not performed. Further, in order to lower the drop lid device 24 while maintaining the horizontal state, it is desirable to manufacture the grease 26 from a material having a specific gravity higher than the specific gravity (0.9). The drop lid device 24 sinks into the grease 26. For this reason, the drop lid device 24 cannot be manufactured using a material having a high specific gravity, and the drop lid device 22 is formed using a material having a low specific gravity. However, the drop lid device cannot be lowered while maintaining the horizontal state as described above. Alternatively, if it is made of a material having a low specific gravity, the drop lid device 24
There was also a problem that it was easily damaged. According to the present invention, the grease discharge failure does not occur,
An object of the present invention is to provide a drop lid device that can surely flatten a grease surface and is not easily damaged. According to the present invention, there is provided a grease pump for sucking grease from inside a grease can by a suction pipe and discharging the grease to the outside. The grease can is slidably inserted through the suction pipe, and its peripheral edge is
A plate-shaped main body having a specific gravity heavier than the grease and a gap between the main body and the main body, the main body being provided along the length direction of the suction pipe, the suction pipe being larger than the main body; A guide portion having a long length in the longitudinal direction, a sealing member provided on the guide portion so as to maintain airtightness with the suction pipe, and a peripheral portion of the main body portion provided through the gap. hand
A rib-shaped buoyancy generating portion in contact with the grease ,
Is provided. According to the present invention, since the guide portion that is longer in the length direction of the suction pipe than the main body portion is formed in the insertion portion between the main body portion and the suction pipe, the main body portion is formed in the suction pipe. The main body is guided without being inclined along the length direction. Moreover, the main body
There is a gap between the peripheral edge of the grease and the inner peripheral surface of the grease can
And the position of the suction pipe is shifted from the original position,
Even if the base can is deformed, the body part descends smoothly
You. Further, since the seal member is provided between the guide portion and the suction pipe, air is not sucked into the suction pipe from the inserted portion. Conversely, the periphery of the main unit and the grease can
There is a gap between the inner peripheral surface of the
The air trapped below the main body
Being expelled from the air and sucking air into the suction pipe
There is no. Further, since the buoyancy generating portion is provided in the main body, the main body does not sink into the grease even if a material having a specific gravity higher than that of grease is used for the main body. Ma
In addition, the buoyancy generating section is rib-shaped, and
An annular gap is formed between them. The annular gap is grease
When the body is sucked, the body descends and is filled with grease,
It becomes a lease passage. Due to the passage resistance at this time, the annular gap
It makes it difficult to suck air into the suction pipe from between. FIG. 1 is a perspective view showing a grease pump according to a first embodiment of the present invention. This grease pump has a cylindrical housing 30, in which a cylindrical grease can 32 is also housed. The upper part of the housing 30 is covered with a removable lid 34, on which a pump 36 and a motor 38 for driving the pump 36 are provided. Reference numeral 40 denotes a discharge port of the pump 36. The suction pipe 42 passes through the lid 34 from the pump 36 and the grease can 32 in the housing 30.
Has penetrated to the bottom. Reference numeral 44 denotes a detachable lid for the grease can 32. In this grease pump, the grease 45 in the grease can 32 is sucked through the suction pipe 42 by driving the pump 36 by the motor 38, and is discharged from the discharge port 40. The drop lid device is provided in the grease can 32. This drop lid device has a main body 46,
The main body 46 is formed of a material having a specific gravity higher than that of the grease 44, for example, a steel plate, in a disk shape slightly smaller in diameter than the grease can 32. At the center of the main body 46, a short cylindrical guide 48 is attached. The suction pipe 42 is inserted into the guide portion 48. Therefore, the suction pipe 42
When the upper surface of the grease 45 is lowered by the suction of the grease 45 by the above, the main body portion 46 is guided by the guide portion 48 and descends. The length of the guide portion 48 in the length direction of the suction pipe 42 is longer than the length of the suction pipe 42 in the main body 46. A seal member such as an O-ring 5 is provided at a contact portion of the guide portion 48 with the suction pipe 42 in order to prevent air from being sucked from the contact portion by the suction pipe 42.
0 is provided. A rib 52 is formed on the periphery of the main body 46 as a buoyancy generating portion. This rib 52
Are formed so as to protrude upward over the entire periphery of the main body 46. The rib 52 is attached to the main body 48.
Is made of a steel plate, the specific gravity is higher than that of the grease 45, and the main body 48 is prevented from sinking into the grease 45. A handle 54 is provided on the upper surface of the main body 46. This is provided for facilitating attachment and detachment of the drop lid device to and from the grease can 32. In the drop lid device configured as described above,
Since the seal member 50 is provided on the contact surface of the guide portion 48 with the suction pipe 42, air flows from the contact surface to the suction pipe 42.
Will not be inhaled. On the other hand, the grease is easily sucked from the peripheral edge of the main body 46, so that the possibility of the main body 46 being inclined increases. However, the length of the guide tube 48 in the length direction of the suction pipe 42 is reduced. Since it is longer than that of 46, the main body 46 descends while keeping a horizontal state without being inclined. Therefore, the upper surface of the grease 45 can always be made flat. In order to assist the body 46 to descend while keeping the horizontal state, the body 4
6 is made of steel having a high specific gravity, but if it is too heavy, the main body 46 sinks into the grease 45. In order to prevent this, a rib 52 is formed on the main body 46 to give buoyancy. In the above embodiment, the main body 46 is formed in a disk shape. However, the present invention is not limited to this, and may be, for example, a polygonal shape. Further, although an O-ring is used as the seal member 50, another member may be used. Further, although the ribs 52 are formed as the buoyancy generating portions over the entire area of the main body 46, it is not always necessary to provide the ribs over the entire area in accordance with the required buoyancy. As described above, according to the present invention, the main body
Has a gap between the inner surface of the grease can and
And the position of the suction pipe is shifted from the original position,
Even if the base can is deformed, it is inhaled by this gap
Tube displacement and deformation of the grease can are absorbed, and the main body is smooth
Descends. Also, usually grease cans with new grease
When stored in the grease, the grease
It has become. Therefore, insert the main body into the grease can
Then, a groove is formed along the inner circumference of the grease can. High
If grease of viscosity is used, air will be
But may become empty due to grease consumption.
Ki comes out to the top through the gap, so
Air is drawn into the suction pipe in the middle of consumption
There is no ejection failure. The body is made of a material with a high specific gravity to help the body descend while keeping it horizontal.However, if the body is too heavy, the body will sink into the grease, preventing this. For this purpose, a buoyancy generating portion is formed in the main body to give buoyancy. Furthermore, this buoyancy generating part is shaped like a rib.
Is formed, so that there is an annular gap between the grease can and the inner peripheral surface.
A gap is formed. This annular gap sucks grease
Sometimes it becomes a grease passage, and due to passage resistance at this time, it becomes empty.
We make it hard to inhale. In addition, since the main body is made of a material having a high specific gravity, it is relatively strong, and the drop lid device is hardly damaged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway longitudinal sectional view of a grease pump using an embodiment of a drop lid device according to the present invention. FIG. 2 is a partially broken longitudinal sectional view of a grease pump using a conventional drop lid device. FIG. 3 is a partially cutaway vertical sectional view showing a use state of a conventional drop lid device. [Description of Signs] 32 Grease can 42 Suction pipe 46 Main body 48 Guide 50 Sealing member 52 Rib (buoyancy creating part)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16N 11/08

Claims (1)

(57) [Claim 1] In a grease pump for sucking grease from inside a grease can by a suction pipe and discharging the grease to the outside, the grease pump is slidable along a length direction of the suction pipe. The grease is inserted into the pipe and the peripheral edge is
A plate-shaped main body having a specific gravity greater than that of the grease , and being provided along the length of the suction pipe at the insertion portion of the main body, the length of the suction pipe being longer than the main body. and a long guide portion length direction is, the seal member provided so as to maintain airtightness between the suction pipe in the guide portion, provided on the periphery of the body portion, the through the gap
A drop cover device for a grease pump, comprising: a rib-shaped buoyancy generating portion in contact with grease.