JP3403547B2 - Cartridge type grease gun - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge type grease gun. [0002] Conventionally, as this type of cartridge type grease gun, there are a manual grease gun and a screw-in type grease gun. Fig. 3 shows a hand-operated grease gun 50
By operating the manual lever 51, grease is discharged from the tip of the grease hose 52. [0003] However, in the above-described conventional type, the amount of grease discharged per operation of the manual lever 51 is a small amount. It took time and effort. Similarly, for a screw-in type grease gun (not shown), since the amount of grease discharged per screwing operation is a small amount, it takes much time and labor to supply a large amount of grease. An object of the present invention is to provide a cartridge type grease gun capable of easily supplying a large amount of grease in a short time. [0005] In order to solve the above-mentioned problems, a cartridge type grease gun according to the present invention comprises a grease cartridge which can be compressed in an axial direction of the oil cylinder in an oil cylinder. A connection in which a head cover is provided at one end of the oil cylinder and an end cover is provided at the other end, a grease discharge port is provided in the head cover, and an inner surface of the head cover communicates with the grease discharge port and can be connected to a tip of a grease cartridge. Part, and in the above-mentioned oil cylinder,
A piston that presses and compresses the grease cartridge toward the head cover is fitted into the end cover, and one end of the end cover forms a gas inflow passage communicating with a space on the pressure receiving surface side of the piston in the oil cylinder. At the end, a gas outlet of a gas cylinder is detachably attached, a sealing body for sealing a gas flow is interposed between the gas outlet and the gas inflow path, and a hole is formed in the sealing body in the gas cylinder. And a drilling device for opening the gas outlet and the gas inflow path. According to the above construction, the gas outlet and the gas inflow passage are opened by piercing the closed body using the piercing device, and the high-pressure gas filled in the gas cylinder is discharged from the gas outlet. And flows into the gas inflow passage, and flows into the space on the pressure receiving surface side of the piston in the oil cylinder. The piston is pushed and moved toward the head cover by the pressure of the gas that has flowed in, and presses the grease cartridge. Thus, the grease cartridge is compressed, and the grease in the grease cartridge is discharged from the grease discharge port. As described above, since the piston is pushed by using the pressure of the high-pressure gas in the gas cylinder, the piston is pushed at once, and a large amount of grease in the grease cartridge can be easily discharged in a short time. An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a grease cartridge that can be stored inside the oil cylinder 3 of the cartridge type grease gun 2. The grease cartridge 1 is formed in a bellows type that can be compressed in the axial direction of the oil cylinder 3 and the inside thereof is filled with grease. A protruding connection port 4 is provided at the tip of the grease cartridge 1, and a male screw is formed on an outer peripheral surface of the connection port 4. A screw-type head cover 5 is detachably attached to one end of the oil cylinder 3, and an end cover 6 is attached to the other end of the oil cylinder 3. A grease discharge port 7 is formed in the head cover 5. A screw connection 8 to which the connection port 4 of the grease cartridge 1 can be screwed is provided on the inner surface of the head cover 5. The screw connection 8 and the grease discharge port 7 are connected via a grease discharge path 9. Communicating. The grease discharge path 9 has a built-in check valve 10 for preventing grease from flowing backward. A disk-shaped piston 11 for pressing the grease cartridge 1 toward the head cover 5 and compressing the grease cartridge 1 is fitted inside the oil cylinder 3 so as to be movable in the axial direction of the oil cylinder 3. An O-ring 12 seals between the outer peripheral surface of the piston 11 and the inner peripheral surface of the oil cylinder 3. A plurality of tension coil springs 13 are connected between the piston 11 and the end cover 6, whereby the piston 11 is pulled in the direction of the end cover 6. A gas cylinder 16 filled with a high-pressure gas (for example, high-pressure air) is detachably attached to the end cover 6 via a screw-type connecting member 17.
That is, the protrusions 18 formed on the outer surface of the end cover 6
Is screwed into one end of the connecting member 17, and a gas outlet 19 formed at one end of the gas cylinder 16 is detachably screwed into the other end of the connecting member 17. One end of the end cover 6 has a space 20 on the pressure receiving surface side of the piston 11 inside the oil cylinder 3.
And a gas inflow path 21 whose other end is open to the front end surface of the projection 18. Further, the connection member 17 is formed with a gas communication passage 22 communicating with the gas ejection port 19 and the gas inflow passage 21. Between the gas outlet 19 and the gas communication passage 22 inside the connecting member 17, a sealing gasket 23 (an example of a closed body) for sealing the gas flow is detachably fitted. [0012] The gas cylinder 16 is provided with the sealing gasket.
A drilling device 26 is provided for drilling a hole in 23 to open the gas outlet 19 and the gas communication passage 22. This drilling device 26
A needle rod 27 having a distal end inserted into the gas cylinder 16 and a proximal end protruding outside the gas cylinder 16; and a needle rod 27 formed at the other end of the gas cylinder 16 so that the needle rod 27 is movable in the axial direction. And a needle bar through hole 28 to be inserted. The distal end of the needle bar 27 is formed so as to be freely inserted into and removed from the gas ejection port 19, the distal end of the needle bar 27 is sharpened in a conical shape, and a disc-shaped operation unit 29 is provided at the base end of the needle bar 27. Have been. Further, inside the gas cylinder 16, the needle bar 27 is provided with a stopper 30 for preventing the needle bar 27 from falling out of the gas cylinder 16. Further, a lock pin 31 for preventing insertion of the needle bar 27 into the gas cylinder 16 is detachably attached to the needle bar 27 outside the gas cylinder 16. In addition, the other end of the gas cylinder 16 has the needle bar
An O-ring 32 is mounted to seal between the outer peripheral surface of 27 and the inner peripheral surface of the needle bar through hole 28 to prevent leakage of high pressure gas. The gas cylinder 16 is provided with a gas inlet / outlet 33 for charging and discharging high-pressure gas, and a valve 34 is connected to the gas inlet / outlet 33. The operation of the above configuration will be described below.
The lock pin 31 is removed from the needle bar 27 as shown by the solid line in FIG.
Is hit with a hammer or the like to drive the needle bar 27 into the gas cylinder 16. As a result, the tip of the needle bar 27 breaks the sealing gasket 23 and an opening 35 is formed in the sealing gasket 23, so that the gas outlet 19 of the gas cylinder 16 and the gas communication passage 22 of the connecting member 17 are opened, and the gas cylinder The high-pressure gas in the gas jet 16 is jetted from the gas jet port 19, passes through the opening 35 of the sealing packing 23, flows into the gas inflow passage 21 through the gas communication passage 22, and
Flows into the interior space 20. As shown by the solid line in FIG. 2, the piston 11 is pushed toward the head cover 5 against the tension of the tension coil spring 13 by the pressure of the high-pressure gas that has flowed in, and moves. Press.
As a result, the grease cartridge 1 is compressed, and the grease in the grease cartridge 1 is discharged from the grease discharge port 7 by pushing the check valve 10 open. As described above, since the piston 11 is pushed by utilizing the pressure of the high-pressure gas in the gas cylinder 16, the piston 11 is pushed at once, and it is easy to discharge a large amount of grease in the grease cartridge 1 in a short time. Can be done. After the end of the lubrication, the valve 34 is opened to release the residual pressure in the space 20 in the oil cylinder 3 and the gas cylinder 16 to the outside. It is pulled back toward the end cover 6 by the pulling force. Then, turn the head cover 5 and turn the oil cylinder 3
By removing the grease cartridge 1 from the screw connection portion 8 of the head cover 5 by rotating the grease cartridge 1, the used grease cartridge 1 can be easily and quickly replaced. Further, the empty gas cylinder 16 is turned and removed from the connecting member 17, and the sealed packing 23 is replaced with a new one. Then, the gas cylinder 16 is screwed into the connecting member 17 and connected. Then, by opening the valve 34 and refilling the inside of the gas cylinder 16 with the high-pressure gas from the gas inlet / outlet 33, the gas cylinder 16 can be reused, which is economical. In the above embodiment, the lock pin 31 is connected to the needle bar.
By attaching to the gas cylinder 16, it is possible to prevent the needle bar 27 from being accidentally driven into the gas cylinder 16. As described above, according to the present invention, the gas outlet and the gas inflow passage are opened by piercing the closed body using the piercing device, and the gas cylinder is filled. The high-pressure gas is ejected from the gas ejection port, flows into the gas inflow path, and flows into the space on the pressure receiving surface side of the piston in the oil cylinder. The piston is pushed and moved toward the head cover by the pressure of the gas that has flowed in, and presses the grease cartridge. Thereby, the grease cartridge is compressed, and the grease in the grease cartridge is discharged from the grease discharge port. As described above, since the piston is pushed by utilizing the pressure of the high-pressure gas in the gas cylinder, the piston is pushed at once, and a large amount of grease in the grease cartridge can be easily discharged in a short time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a cartridge type grease gun according to an embodiment of the present invention. FIG. 2 is a cross-sectional view for explaining a greasing procedure using the cartridge type grease gun. FIG. 3 is a side view of a conventional manual grease gun. [Description of Signs] 1 Grease cartridge 2 Cartridge type grease gun 3 Oil cylinder 5 Head cover 6 End cover 7 Grease discharge port 8 Screw connection section 11 Piston 16 Gas cylinder 19 Gas ejection port 20 Space 21 Gas inflow path 23 Sealed packing (sealed body) 26 Drilling device 35 Opening

Continuation of the front page (56) References JP-A-49-125906 (JP, A) JP-A-50-78876 (JP, U) JP-A-58-89690 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) F16N 3/10-3/12 F16N 11/10

Claims (1)

(1) A grease cartridge compressible in the axial direction of the oil cylinder is housed in the oil cylinder, a head cover is provided at one end of the oil cylinder, and an end is provided at the other end. A cover is provided, a grease discharge port is provided in the head cover, a connection portion communicating with the grease discharge port and to which a tip of a grease cartridge is connectable is provided on an inner surface of the head cover. The end cover has a gas inflow passage having one end communicating with the space on the pressure receiving surface side of the piston in the oil cylinder, and a gas cylinder at the other end of the gas inflow passage. Gas outlet is detachably mounted,
A seal is provided between the gas outlet and the gas inflow passage to seal the flow of gas, and a hole is formed in the gas cylinder to open the seal and open the gas outlet and the gas inflow passage. A cartridge type grease gun characterized by including a device.