JPH08155779A - Chip delivery equipment - Google Patents

Abstract

PURPOSE: To deliver the chips in a constantly stable manner while a coil conveyor is rotated by providing a stirring device to collapse the chips in the bridged condition on the coil conveyor. CONSTITUTION: While chips are thrown into a hopper 1 and a coil conveyor 2 is rotated, each stirring bar 7 to form a stirring device is continuously and reciprocally oscillated at the constant period by a pneumatic piston cylinder device 9. The chips are repeatedly and mechanically stirred by the stirring bars 7 to collapse the chips in the bridged condition on the coil conveyor 2. The bridged condition of chips in the vicinity of the upper part of the rotating coil conveyor 2 is prevented, and as a result, no large cavity is generated in the layer of the chips, or the coil conveyor 2 does not fail to catch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip feeding device for feeding metal chips generated from a lathe or a machine tool from a hopper to, for example, a compression molding machine.

[0002]

2. Description of the Related Art Since chips such as metal cutting chips produced from metal machine tools are bulky as they are, they must be formed into briquette solids by a compression molding machine such as a press machine before being used as a recycling resource. Is desired. In this case, the chips collected from the machine tool are collected in the hopper and sent to the compression molding machine from the outlet of the hopper, and the metal chips received are fed to the hopper by the coil conveyor arranged in the hopper. There is provided a chip feeding device for feeding to.

The coil conveyor of the conventional chip feeding device is simply a so-called spiral conveyor that is exposed in the hopper, and the entangled chips are sent out in the direction of the rotation axis by being driven to rotate around the central axis of the helix. Therefore, the chips that have fallen onto the coil conveyor that continuously rotates in the hopper are sent to the compression molding machine from the hopper outlet by being entwined with the rotating coil conveyor and being sent in the inner space of the coil in the axial direction.

[0004]

Many of the chips collected from a machine tool or the like have oil attached thereto, and when a large amount of such chips is thrown into the hopper, the coil conveyor is moved to the bottom of the hopper. In the case of a conventional chip feeding device that is simply exposed and arranged, even if the chips caught by being caught in the conveyor coil are sent out, the succeeding chips slip and remain unentangled in the coil, resulting in A so-called bridging phenomenon is likely to occur in which chips are accumulated in a bridge shape on the upper part of the periphery of the conveyor while leaving a cavity in the rotating coil conveyor portion, and only the coil conveyor idles inside the accumulation of chips.

Once the chips cause the bridge phenomenon in the hopper, the coil conveyor can no longer feed the chips, so that the subsequent compression molding machine cannot operate.

An object of the present invention is to provide a chip feeding device which can always achieve stable chip feeding operation during rotation of a coil conveyor in order to eliminate such a problem. .

[0007]

According to the present invention, in a chip feeding device for feeding metal chips received in a hopper to a hopper outlet by a coil conveyor arranged in the hopper, chips which are in a bridge state on the coil conveyor. The aforesaid problem is solved by attaching a stirring device for breaking the hopper to the hopper.

According to a preferred aspect of the present invention, the stirring device includes a stirring bar extending substantially in the direction of the rotation axis of the coil conveyor immediately above the coil conveyor, and the stirring bar in a direction orthogonal to the direction of the rotation axis. It includes a pivot arm that supports reciprocating rocking, and a drive device that reciprocally rocks the stirring bar via the pivot arm.

According to another preferred aspect of the present invention, the drive device includes a hydraulic piston cylinder device, and a piston rod of the hydraulic piston cylinder device is linked to a pivot member of the arm.

[0010]

In the chip feeding device of the present invention, the agitator mechanically agitates the chips while the chips are put into the hopper and the coil conveyor is rotating, and the chips are bridged on the coil conveyor. Since the chips that are about to enter the state are destroyed, even if chips are attached to oil, the chips that accumulate on the coil conveyor that continuously rotates in the hopper will not be removed by the conveyor coil feeding operation. When a gap is about to be created in the hopper, it is crushed by mechanical stirring by a stirring device, and the crushed chips are entangled with the rotating coil conveyor one after another, and the coil inner space of the conveyor is sequentially fed in the axial direction to the hopper. It goes to the outlet, so there is no large cavity in the layer of chips surrounding the rotating coil conveyor part, and the chips are bridged around the top of the conveyor. Nor coil conveyor is idle because not remain.

When the agitating device is configured to include the agitating bar, the pivot arm and the driving device, the agitating bar is rotated by the pivot arm in a state where the agitating bar extends substantially in the direction of the axis of rotation of the coil conveyor immediately above the coil conveyor. It is supported so that it can be reciprocally rocked in a direction orthogonal to the axial direction, and the drive device reciprocally rocks the stirring bar via a pivot arm, so the axial direction of the coil conveyor is adjusted according to the extension dimension of the stirring bar. It is possible to mechanically stir the deposit of chips in the required position in the required size range.

[0012] In this case, not only is the structure in which the region over substantially the entire length of the coil conveyor is agitated by an integral stirring bar, but the region over the entire length of the coil conveyor is divided into several axial length ranges, and each region is divided. Alternatively, the stirring bars may be dividedly arranged, and the stirring bars may be reciprocally rocked in different rocking cycles or phases. A single stirring bar may be used, but it is preferable to provide a plurality of stirring bars arranged in parallel in terms of stirring ability.

The drive device can be composed of various motor devices such as an electric motor, but a fluid pressure piston cylinder device, for example, pneumatic or hydraulic pressure, can be used to obtain the torque necessary for stirring the chips and operate the device stably. It is preferably constituted by a piston cylinder device. In this case, if a structure in which the piston rod of the fluid pressure piston cylinder device is linked to the pivot support member of the pivot arm is adopted, the pivot shaft end of the pivot arm can be disposed so as to project to the outside of the hopper. Similarly, the swinging link member can be arranged outside the hopper, which has the advantage of avoiding the risk of chipping of the link member and causing malfunction.

The oscillating motion of the stirring bar may be a continuous or intermittent periodic motion, and the driving device for performing such oscillating motion is in an operating state in conjunction with the operation of the coil conveyor. Or it can be activated by the operator at any time.

[0015]

1 and 2 show a chip feeding device according to an embodiment of the present invention. 1 is a front view with a part cut away, FIG. 2 (a) is a view taken along the arrow aa in FIG. 1, and FIG. 2 (b) is a right side view showing the outer appearance of the hopper.

As shown in the drawing, the chip feeding device of this embodiment is applied to a hopper 1 having a bottom portion constricted on the front side and the back side by inclined bottom surfaces on the front side and the back side. The coil conveyor 2 is arranged at the bottom of the hopper 1, and the rotation center axis of the coil conveyor 2 extends in the width direction of the hopper bottom.

At the bottom of the left side surface of the hopper 1, an outlet (opening) 3 is provided so that a part of the tip of the coil conveyor 2 can be seen outside.
Is provided, and a motor 4 for rotationally driving the coil conveyor 2 is attached to the bottom of the right side surface of the hopper 1.

The coil conveyor 2 is rotationally driven by a motor 4, and thereby sends the chips in the hopper 1 toward the outlet 3 in the width direction of the hopper.

A stirring device is arranged in the hopper 1, and in this embodiment, the stirring device is supported on both side walls of the hopper 1 so as to be positioned substantially parallel to the upper part of the coil conveyor 2 in the hopper 1. And a reciprocating rotary shaft 5. A plurality of sets of pivot arms 6 protruding in three directions are fixed to the shaft 5 at intervals in the length direction.

The protruding directions of the pivot arms 6 of each set are aligned, and the three stirring bars 7 are parallel to each other by the respective tips of the pivot arms 6 protruding in three directions of each set, and the center of rotation of the conveyor is the same. The stirring bar is held so as to be substantially parallel to the axis, and each stirring bar is reciprocally rocked in the direction orthogonal to the rotation axis direction of the coil conveyor 2 by the reciprocating rotational movement of the shaft 5.

Of the pivot arms 6 projecting in three directions, the central pivot arm is longer than the pivot arms on both sides, so that the stirring bar fixed to the tip of the central pivot arm is more than the stirring bars on both sides. Is also given a long turning radius,
Even with this long turning radius, the stirring bar does not mechanically interfere with the coil conveyor 2.

One end of the shaft 5 penetrates the right side wall of the hopper 1 and projects to the outside, and a link arm 8 is fixed to the projecting shaft end. At the tip of the link arm 8, the tip of the piston rod of the pneumatic piston cylinder device 9 pivotally supported by the hopper 1 or its supporting structure 10 is pivotally attached, and by the expansion and contraction movement of the piston rod of the pneumatic piston cylinder device 9, Rotate the link arm 8 back and forth,
As a result, the shaft 7 and the stirring bars 5 fixed to the shaft 7 by the pivot arm 6 are caused to swing.

In the present embodiment, while the chips are put into the hopper 1 and the coil conveyor 2 is being rotated by the motor 4, the stirring bars 7 constituting the stirring device are connected to the pneumatic piston cylinder device 9 by the pneumatic piston cylinder device 9. Is continuously oscillated by a constant cycle. As a result, the chips are stirred bar 7
At the same time, mechanical agitation is repeatedly performed, and thereby the chips that are about to become a bridge state on the coil conveyor 2 are destroyed.

In this case, even if chips are attached with oil, the chips accumulated on the coil conveyor 2 which continuously rotates in the hopper 1 are vacant in the inner space of the coil by the feeding operation of the conveyor coil 2. When it is attempted to do so, it is cut by mechanical stirring by the stirring bar 7, and the cut chips are entangled with the rotating coil conveyor 2 one after another, and the coil inner space of the conveyor is sequentially sent in the axial direction to the hopper. You will be heading to Exit 3.

The coil conveyor 2 rotating in this way
The chips are prevented from remaining in the vicinity of the upper part of the bridge in the form of bridges, so that no large cavities are formed in the chip layer and therefore the coil conveyor does not idle.

In this embodiment, the driving device of the agitating device is constituted by the pneumatic piston cylinder device as the reciprocating motor. However, when a larger torque is required, the hydraulic piston cylinder device is used. It goes without saying that, instead of the reciprocating motor, the drive device may be configured by a so-called rotary type motor, such as a fluid pressure swing motor or a combination of an electric motor and a rotation reversing mechanism.

In any case, the rocking motion of the stirring bar by the driving device can be a continuous or intermittent periodic motion, and the driving device for performing such rocking motion is the operation of the coil conveyor. It can be activated in conjunction with, or can be activated at any time by the operator, and the swing cycle can be changed according to the speed of the coil conveyor or an external setting signal. Can also be adopted.

Further, in the present embodiment, the case where the coil conveyor is single and therefore the single stirring device is also shown, but when a plurality of coil conveyors are provided in parallel, the stirring device is provided for each coil conveyor. May be provided, or a small number of agitating devices in an agitating range that commonly serve several coil conveyors may be provided.

Further, in the present embodiment, as the stirring means of the stirring device, the description has been made only about the case where a plurality of stirring bars having an integral whole length are integrally swung by the reciprocating rotation of the shaft. It may be divided, or the number of pivot arms is appropriately increased without providing a stirring bar,
The pivot arm itself may be made to function as a stirring means. In such a case, adjacent stirring means may be swung in mutually opposite directions, or a phase difference may be given to the swing cycle of each stirring means. However, the structure of the stirring device, including the structure of the shaft and the drive system therefor, can be variously modified by those skilled in the art.

[0030]

As described above, in the chip feeding apparatus according to the present invention, the agitator mechanically agitates the chips while the chips are put into the hopper and the coil conveyor rotates. However, since the chips that are about to become a bridge state on the coil conveyor are destroyed, the chips that accumulate on the coil conveyor that continuously rotates in the hopper will not be fed even if the chips adhere to the oil. When an attempt is made to create a void in the coil inner space, it is cut by mechanical stirring by a stirring device, and the cut chips are entangled with the rotating coil conveyor one after another, and the coil inner space of the conveyor is sequentially rotated. Will be sent to the hopper exit.

Therefore, according to the chip feeding device of the present invention,
No large cavities are created in the chip layer surrounding the rotating coil conveyor part, and the chips do not remain in a bridge shape on the upper part of the periphery of the conveyor, so the coil conveyor does not idle, and the coil conveyor is rotating. In addition, it is possible to obtain the effect that the chip feeding operation can always be stably achieved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a chip feeding device according to an embodiment of the present invention.

2 is a view as seen from the direction of arrow aa in FIG. 1, and FIG. 2 is a right side view showing the outer appearance of the hopper.

[Explanation of symbols]

 1: Hopper 2: Coil conveyor 3: Hopper outlet (opening) 4: Motor 5: Shaft 6: Pivoting arm 7: Stir bar 8: Link arm 9: Pneumatic piston cylinder device (driving device) 10: Support structure

Front page continuation (72) Inventor Takashi Sashida 2-4-1 Nakarokugo, Ota-ku, Tokyo

Claims (3)

[Claims] 1. A chip feeding device for feeding metal chips received in a hopper to an outlet of a hopper by a coil conveyor arranged in the hopper, wherein a stirring device for breaking chips in a bridge state on the coil conveyor is a hopper. A chip feeding device characterized by being attached to the. 2. A stirring device, wherein a stirring device extends directly above the coil conveyor and extends substantially in the direction of the rotation axis of the coil conveyor, and a center for supporting the stirring bar so that the stirring bar can reciprocally swing in a direction orthogonal to the direction of the rotation axis. The chip feeding device according to claim 1, further comprising a moving arm and a drive device that reciprocally swings the stirring bar via the pivot arm. 3. The cutting device according to claim 2, wherein the drive device includes a hydraulic piston cylinder device, and a piston rod of the hydraulic piston cylinder device is linked to a pivot member of the arm. Scrap feeder.