JPS618257A - Automatic chip discharger - Google Patents

Abstract

PURPOSE:To block entanglement of chips in an automatic chip discharger for machine tool, by providing plural stages of concentrically rotatable spirals such that the rotary speed will increase as the stage will advance while reversing the rotary direction alternatively. CONSTITUTION:Cutting oil and cutting chips are flowed over an oil pan 7 of machine table 5 and led through the funnel through section 23 of oil tank 21 below a chip discharge tube 25. The inclined chip discharge tube 25 is provided with first and second spirals 29, 31 in two steps to be rotatable concentrically and independently. In other word, the first spiral 29 located at the lower portion of inclination will drive through a tubular shaft 22 of second spiral 31 located at the upper position by means of a rod shaft 35 and arranged such that the spiral 31 at the rearer stage will rotate with higher speed while reversing the rotary direction between the adjoining spirals. Consequently, under carrying of chips through the discharge tube 25, the rear stage spiral will produce such function as to block entanglement of chips resulting in automatic blockage of clogging of discharge tube.

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to an automatic chip discharge device, and more specifically, for automatic discharge of chips from machine tools, etc., a plurality of stages are installed in a chip discharge pipe. This invention relates to an automatic chip discharge device equipped with a concentrically rotating spiral.

b. Prior Art As disclosed in Japanese Patent Publication No. 47-1277 (1971.13), in the past, cutting chips flowing down an oil pan together with cutting oil in a machine tool, etc., were removed using a wire mesh or the like. After draining the oil for 1*t L, it was moved to a higher location using a spiral conveyor and discharged.

However, with steel types that are highly tough and hard to break (such as stainless steel), thin needle-shaped chips tend to get entangled with each other and accumulate in the discharge pipe, which can cause various problems in automatic operation. was.

C0 Problems to be Solved by the Invention The present invention relates to an automatic chip discharging device that solves the problem of chips clogging in discharge pipes of disembarked chips.

Means for Solving the d1 Problem The present invention provides a means for solving the problem by providing a plurality of stages of concentrically rotating spirals in the chip discharge pipe.

More specifically, the problem is solved by providing the above-mentioned multiple stages of concentrically rotating spirals so that they rotate at higher speeds as they progress through the stages, and further by mutually changing the rotation directions of adjacent spirals.

e. Examples First, the background of the present invention will be explained based on the third and fourth articles.

FIG. 3 is a front view of a so-called horizontal bandsaw machine 1 embodying the present invention. It swings around and rises by the drive of the fluid pressure cylinder 11.

The endless band saw blade 17, which is wrapped around the left and right saw blade wheels 13 and 15 of the saw blade housing 3 described above, is driven by an electric motor (not shown) and is fixed to the body vise 19 as it circulates and descends. The material to be cut W is cut.

As shown in FIG. 4, a large oil tank 21 is provided in the machine base 5, and the cutting oil and chips used for cutting are flowed over an oil pan 7 into a funnel-shaped bridge section. 23 and is led to the lower part of the chip discharge pipe 25.

The above-mentioned chip discharge pipe 25 is provided at an angle as shown in the illustrated example, and there are many small holes in the lower surface of the chip discharge pipe 25, so that the cutting oil is separated from the chips and stored in the oil tank 2. stored at the bottom of the

Although not shown, the space on the left side of the machine base 5 in FIG. 4 is a part where a hydraulic oil pump for the hydraulic cylinder 11 and a cutting oil pump for circulating cutting oil are installed.

Conventionally, the chips were passed through the above-mentioned chip discharge pipe 25 and moved up diagonally between the pipe walls in one spiral, and were taken out from the upper end into the chip storage bucket 27.

The present invention relates to the above-mentioned spiral device.
As shown in the figure, there is a first spiral 29 in the chip discharge pipe.
and a second spiral 31 are provided in two stages for independent concentric rotation.

That is, the first spiral 29 having a downwardly sloping neck is separately driven by a rod shaft 35 in the tubular shaft 33 of the second spiral 31 located above IF 711 .

FIGS. 4 and 5 are examples that embody the configuration shown in FIG. There is.

On the other hand, the second spiral 31 is driven by the tubular shaft 33 from the second electric motor 41 via a torque limiter 43, a sprocket 45, a tuning band 47, and a gear 49.

Therefore, the first spiral 29 and the second spiral 31
are rotatable in the same direction or in opposite directions at different rotational speeds by independent electric motors 37 and 41.

In another embodiment of the invention shown in FIG.
The rod shaft 35 of the first spiral 29 is driven from the output shaft 53 of the first spiral 29 via a sprocket 55, a tuning band 57 such as a chino, and a sprocket 59. On the other hand, the tubular shaft 33 of the second spiral 31 is driven via a pair of gears 61, 61 connected to the output shaft 53 of the same electric motor 51.

As is already clear from FIG. 2, the first spiral 29 is driven by transmission by the tuning belt 57, whereas the second spiral 31 is driven by transmission by the gear 61, so the rotation direction is opposite. .

In the case of driving by this one electric motor 51, it goes without saying that the first spiral 29 and the second spiral 31 are provided with their respective twisting directions opposite to each other.

19. The apparatus according to the embodiment of the present invention described in detail below is provided with a first spiral and a second spiral that rotate concentrically during the discharge of chips. is fast, and furthermore, the directions of rotation between adjacent spirals are reversed.

Therefore, while the chips are being driven in a spiral manner through the discharge pipe, the spirals in the later stage generate an action that separates the chips from each other, and also reverse the direction of spiral rotation along the way as they move through the discharge pipe. There is.

In this way, the effect of closing the entanglement of chips in the discharge pipe was further strengthened.

9. Effects of the Invention The device that embodies the technical idea of the present invention uses a relatively simple mechanism to automatically eliminate the mutual entanglement of chips and the resulting clogging of the discharge pipe. It was effective.

It is also clear that design changes can be easily made without departing from the technical idea of the present invention.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention. FIG. 2 is an explanatory diagram of the second embodiment of the same as above. FIG. 3 is a front view of a band saw machine as an example of the present invention. FIG. 4 is a side sectional view of the first embodiment. FIG. 5 is a plan view of the right end portion of FIG. 4. (Explanation of symbols representing main parts of drawings) 1...Horizontal band saw machine 25...Chip discharge pipe 29.
...First spiral 31...Second spiral 33.
... Tubular shaft 35 ... Rod Shaft 51 ... Electric motor 57 ... Tone Band 61 ... Gear

Claims (4)

[Claims] (1) An automatic chip discharge device characterized by having a plurality of stages of concentrically rotating spirals provided in a chip discharge pipe. (2) The automatic chip discharging device according to claim 1, characterized in that the plurality of stages of concentrically rotating spirals are provided with rotational speeds that are changed such that the spirals rotate at higher speeds as they proceed to later stages. (3) The automatic chip discharging device according to claim 1, characterized in that the plurality of stages of concentrically rotating spirals are provided with rotation directions changing between adjacent stages. (4) The automatic chip discharging device according to claim 1, characterized in that the plurality of stages of concentrically rotating spirals are provided with rotational speeds and rotational directions varying between adjacent stages.