JPS6334833Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an automatic grease injection device, and more particularly to an automatic grease injection device for sliding parts of pallets.

A transfer machine is a combination of a series of specialized machines for drilling, reaming, tapping, milling, etc., and a workpiece conveyance device that synchronizes each machine. In addition to having a large number of stations for performing various types of processing, there are inspection stations, reversing devices for reversing parts to various processing positions, washing stations for washing off chips and the like while rotating parts, and oiling stations between these stations. specifically arranged.

Generally, the parts of the workpiece are fixed to a jig or pallet and transported to each station, where they are machined. The workpieces on the pallet are automatically attached and released onto the pallet by being tightened or loosened by the rotation of the fixing screw. In this way, the pallet is provided with many rotating and sliding parts that tighten or loosen the workpiece, as explained below, and these sliding parts are filled with grease, etc. A refueling station is especially provided for transfer machines.

A conventional oil supply system is shown in FIG. In the figure, reference numeral 1 denotes a refueling station provided between work stations, and a pallet 2 supporting processed products is locked to this refueling station 1 by a predetermined fixing mechanism. A threaded hole 4 is formed in the upper end casing 3 of the pallet 2, into which a push rod 6 having a thread 5 cut on its outer periphery is screwed. A coupling ring 7 is formed at the base of the push rod 6 for rotating the push rod 6, and an abutting portion 8 and an engaging portion 9 are formed at the tip. 10
is a substantially T-shaped clamp rotatably supported on the pallet 2 by a pin 11 etc., and one end of this clamp 10 is adapted to come into contact with the contact portion 8 via a steel ball 12. . Furthermore, the protrusion 13 provided at one end of the clamp 10 engages with the engaging portion 9 of the push rod 6, and the clamp 10 is rotated around the pin 11 by moving the push rod 6 in the left-right direction in the figure. It's becoming like that. At the center of the pallet 2, a workpiece 15 is supported, which is held down by a contact surface 14 provided at the other end of the clamp 10, and at the lower end of the pallet 2, a clamp 10A similar to that described above is supported. The workpiece 15 is provided with a clamp 1
0 and a clamp 10A, it is securely tightened and fixed to the pallet 2. A grease cap 17 for injecting grease or the like is provided on the upper surface of the pallet, and as shown in FIG. and 4A. The refueling station 1 is provided with a refueling device (not shown) facing the refueling port 17 of the pallet upper part 3, and this refueling device approaches the refueling port 17 at a distance using a predetermined mechanism to supply oil to the sliding parts of the pallet 2. I'm starting to do that. When a series of cutting etc. of the workpiece 15 is completed, a rotary drive device (not shown) engages the coupling 7 of the push rod 6 at the unloading station and rotates the push rod 6 in a predetermined direction in order to remove the workpiece on the pallet. Then, the push rod 6 retreats to the position indicated by the imaginary line in the figure, and the clamp 10 also rotates around the pin 11, so that the workpiece 15 is released from the pallet 2. At this time, the clamps 10A are also operating synchronously. In this way, the threaded hole 4 of the push rod 6 is filled with grease introduced into the thread gap by repeated sliding and rotating operations, thereby preventing chips and cutting fluid from entering these sliding parts.

However, in the conventional lubricating system for transfer machines, a dedicated lubricating station was installed to lubricate the sliding parts of the pallets with Chris, etc., which required a large floor space of the transfer machine. There was a problem with that. Another problem was that refueling was not done efficiently enough.

This idea was created by focusing on the above problem, and it connects a replaceable refueling unit to a pallet.
The object of the present invention is to solve the above-mentioned problems by supplying grease, etc. in a supply unit to the sliding parts of the pallet using a forced injection means provided in a processing station.

Examples of this invention will be described below based on the drawings. In FIG. 3, reference numeral 20 denotes a station for performing arbitrary cutting operations, and a pallet 21, which supports a workpiece (not shown), is secured to this station 20 by a predetermined tightening mechanism. palette 21
A screw hole 22 is formed at a predetermined position, and this screw hole 22 communicates with an oil passage 23 bored inside the pallet 21. On the other hand, a screw hole 24 is formed in the pallet 21, and a screw 25 is slidably screwed into this screw hole 24. Oil road 2
3 communicates with the screw hole 24, and also communicates with a hole into which a screw hole, pin, or the like (not shown) is slidably inserted. Reference numeral 26 denotes a lubricating unit attached to the screw hole 22, and this lubricating unit 26 is composed of a grease cup 27 as an oil storage part and a cylinder 28 as a lubricating part. cylinder 2
A threaded part 31 having an inner hole 30 is formed at the tip of the threaded part 8 , and this threaded part 31 is screwed into the threaded hole 22 . The oil supply unit 26 is detachably supported by the pallet 21 through a screw hole 22, and the screw hole 22 serves as a mounting hole for attaching the oil supply unit 26 to the pallet 21. A check valve 32 is screwed into one end of the inner hole 30, and a coil spring 33 is housed inside the cylinder 28. 34 is a piston slidably inserted into the cylinder 28, and the rod 3 of the piston 34
5 protrudes outward from the base end of the cylinder 28. The piston 34 is always urged to the left in the drawing by a coil spring 33, and the cylinder 28 in front of the piston 34 is filled with grease or the like for oil supply. A threaded hole 37 is formed in the middle of the cylinder 28, and this hole 37 communicates with the inside of the cylinder 28. A threaded portion 39A having a hole 38A is formed in the grease cup 27, and this threaded portion 39A is screwed into the hole 37. The grease cup 27 has a substantially cylindrical shape, and a piston 38 is slidably inserted into the grease cup 27. Piston rod 39 of piston 38
protrudes upward from the lid 40 of the grease cup 27, and a coil spring 41 is interposed between the back surface of the piston 38 and the lid 40, so that the piston 38 is always urged downward in the figure. The lid 40 is screwed into and fixed to the grease cup 37, and the front surface of the piston 38 inside the grease cup 27 is filled with spare grease or the like. A dog 43 is fixed to the tip of the piston rod 39, and a proximity switch 44 is provided on the station 20 so as not to face the dog 43.
This proximity switch 44 detects a predetermined position of the dog 43 and turns on a lamp, etc. not shown. This dog 43 and the proximity switch 44 serve as means for detecting the remaining amount of grease. Further, a predetermined station 2 is provided so as to face the piston rod 35 of the cylinder 28.
A drive cylinder 45 is installed in advance on the drive cylinder 45, and a piston rod 46 of this drive cylinder 45
The piston 34 slides against the coil spring 33 and compresses the grease in the cylinder 28. This cylinder 45 is driven by a detection signal when a pallet is carried into a predetermined position. This drive cylinder 45
and rod 46 constitute means for forcibly injecting grease. If instead of this drive cylinder, the movement of the processing head in the Z direction is used to selectively abut the rod 35, grease can be injected at any station when it runs out.

Next, the effect will be explained. When the pallet 21 is locked and fixed to a predetermined processing station 20, the drive cylinder 45 is actuated by a detection signal delivered to a predetermined position. Then, the rod 46 protrudes and pushes the piston rod 35 together with the piston 34 to the right in the figure by a predetermined amount. The grease in the cylinder 28 is injected into the gap between the screw hole 24 and the screw 25 through the oil passage 23 through the hole 30 of the check valve 32. As a result, the grease accumulated in the screw holes 24 is pushed out and discharged onto the surface of the pallet 21.
It is collected in a designated collection groove along with chips and cutting fluid. When the rod 46 retreats, the piston 34 moves to the left in the figure due to the repulsive force of the coil spring 33. Then, the check valve 32 is closed, and at the same time, the valve 38A that was blocked by the piston 34 is opened, and the repulsive force of the coil spring 33 transfers the grease filled in the grease cup 27 to the cylinder 28.
It works to suck it inward. Further, since the piston 38 is pushed by the expansion force of the coil spring 41, the grease easily flows into the cylinder 28 from the grease cup 27. The pallet 21 is moved to another station and refueling is repeated at predetermined intervals. When the grease in the grease cup 27 decreases, the piston 38, rod 39 and dog 43 lower, and the dog 43 actuates the proximity switch 44. Then, a lamp (not shown) lights up, indicating that the amount of grease remaining in the oil supply unit 26 has fallen below the specified amount.

As explained above, according to this invention, a lubricating unit for supplying grease to sliding parts such as threaded parts of the pallet is installed at a predetermined position on the pallet, and a dedicated lubricating station is omitted, and the lubricating unit inside the lubricating unit is By installing a detection means for detecting the remaining amount of grease and a forced grease injection means at any station, it is possible not only to perform efficient lubrication at all times, but also to provide a transfer machine that does not waste floor space. You can get the effect that you can.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a conventional grease injection device seen from the side, FIG. 2 is a partial sectional view of the conventional grease injection device seen from the front, and FIG. 3 is a partial side view of the automatic grease injection device according to the invention. FIG. 4 is an enlarged partial sectional view of the automatic grease injection device of this invention. 20...Station, 21...Palette, 2
2... Hole (coupling hole), 23... Oil passage, 26... Oil supply unit, 43... Dog, 44... Proximity switch (detection means), 45... Drive cylinder, 46
... Rod (forced injection means).

Claims (1)

[Scope of utility model registration request] A lubrication station that is provided along with the transfer machine and that supplies grease to the transfer machine; a pallet that moves between the stations of the transfer machine; an oil passage that communicates with the parts and supplies grease; and an oil passage that is removably provided in the pallet and that partially communicates with the oil passage to supply grease to each sliding part of the pallet through the oil passage. a refueling unit comprising an oil storage part and a lubricating part, which is a cylinder containing a piston with a rod; and a refueling unit that is provided on the refueling station side and detects when the pallet equipped with the refueling unit is carried into a predetermined position by a detection signal. a forced injection means which is driven and presses one end of the rod of the lubricating part of the lubricating unit to forcibly inject the grease in the lubricating unit into the oil passage; An automatic grease injection device comprising a detection means for detecting the remaining amount.