WO2020079804A1

WO2020079804A1 - Workpiece stocker

Info

Publication number: WO2020079804A1
Application number: PCT/JP2018/038834
Authority: WO
Inventors: 鈴木俊史; 合津秀雄
Original assignee: 株式会社Ｆｕｊｉ
Priority date: 2018-10-18
Filing date: 2018-10-18
Publication date: 2020-04-23
Also published as: JPWO2020079804A1; JP6995218B2

Abstract

A workpiece stocker for collecting coolant, comprising: a pallet mover that moves a plurality of pallets on which workpieces are to be loaded and which are arranged circumferentially; a coolant receiver that is provided in an area corresponding to the moving area of the pallet; a partition board that is a part of the coolant receiver and delimits an area corresponding to the workpiece delivery position provided on the moving path of the pallet; and a drain passage for discharging coolant having fallen in the area delimited by the partition board.

Description

Work stocker

The present invention relates to a work stocker that collects a coolant.

A work stocker is used in the processing machine line that sequentially conveys and processes the work, in order to load the work before processing or to collect the work after processing. An autoloader is incorporated in such a processing machine line, and the work transfer robot automatically transfers the work to the machine tool or the work stocker. The work stocker that has undergone each step is sent to the work stocker that collects the worked work. However, since a large amount of coolant is sprayed during the working, the coolant adhering to the work surface is brought in. Therefore, it is preferable that the coolant is also collected in the work stocker. As a conventional example relating to this point, for example, Patent Document 1 below discloses a coolant liquid recovery method in a machine tool. Specifically, the drain passage and the inside of the sub tank are made negative pressure by the suction device, and the coolant sucked by the negative pressure is collected in the sub tank.

Japanese Patent Laid-Open No. 2001-1228

However, when collecting coolant in a machine tool like the conventional example described above, a suction device is used to handle a large amount of coolant, but there is no space for installing a suction device in the work stocker. Moreover, the work stocker does not accumulate the coolant enough to use the suction device. Therefore, the structure of the work stocker is such that an oil pan is provided in a range where the collected work moves inside the machine, and receives the coolant dripping from the work. A drain passage is formed in the oil pan so that the accumulated coolant can be collected, but since the amount is rather small, it does not flow to the drain passage and remains on the oil pan. Then, the coolant from which the water has evaporated remains on the oil pan as dirt.

Therefore, an object of the present invention is to provide a work stocker that collects coolant in order to solve such a problem.

A work stocker according to an aspect of the present invention includes a pallet moving device that moves a plurality of pallets on which works are arranged side by side in a circumferential shape, a coolant receiver provided corresponding to a moving range of the pallet, and a coolant receiver. And a drain plate for partitioning a range corresponding to the delivery position of the work provided on the moving path of the pallet, and a drain passage for discharging the coolant falling in the range partitioned by the barrier plate.

According to the above configuration, the coolant receiver is provided corresponding to the moving range of the plurality of pallets moved by the pallet moving device, but the range corresponding to the delivery position of the work, which is a part thereof, is partitioned by the weir plate. Therefore, it becomes easier for the coolant to collect in a part thereof, and a larger amount of the coolant also flows into the drain passage and can be collected.

It is the front view which showed the terminal part of the processing machine line. It is a side view of the inside which showed the work stocker from the relay device. It is a top view showing the inside of a work stocker. It is a top view showing the internal structure of the front part of a work stocker. It is a perspective view showing the internal structure of the front part of a work stocker.

Next, an embodiment of the work stocker according to the present invention will be described below with reference to the drawings. The work stocker of this embodiment is configured as a part of a processing machine line, and FIG. 1 is a front view showing a terminal end portion of the processing machine line. Specifically, a work stocker, a relay device, and a machine tool are shown. In the processing machine line 1, a plurality of machine tools 3 are arranged side by side, and an autoloader that conveys a work W according to a processing order is incorporated. In the processing machine line 1, a transfer space in which the work transfer robot 4 moves is formed on the front surface, and the work is transferred from the front side of the machine tool 3.

The work W that has been processed in each process is sent to the relay device 5 or the work stocker 7. The relay device 5 is provided with a temporary placement table 501, and the processed work W placed there is subjected to inspection and the like. As shown in the drawing, the multi-joint work transfer robot 4 enters the relay device 5 and the work stocker 7 from the lateral direction to transfer the work W. The width dimension of the relay device 5 is designed to be small so that the work transfer robot 4 can reach the work stocker 7 past the relay device 5. In this embodiment, the machine tool 3 and the work stocker 7 have a compact width of 450 mm, but the relay device 5 has a half width of 225 mm.

Here, FIG. 2 is a side view of the inside of the work stocker 7 as viewed from the relay device 5 side. Further, FIG. 3 is a plan view showing the inside of the work stocker 7. In the work stocker 7, a pallet moving device 11 that moves a plurality of pallets 21 in the circumferential direction along an oval path is formed on a base 15. In the pallet moving device 11, three long positioning pins 23 are pushed upward with respect to the traveling base 22, and the pallet 21 is mounted on the traveling base 22 so as to be restrained by the positioning pins 23. Has been done. The disk-shaped pallet 21 is mounted on the traveling table 22 in a state where three slits 211 are radially formed and are penetrated by three positioning pins 23.

The pallet 21 can be moved in the vertical direction along the positioning pins 23 while maintaining a horizontal posture, and a plurality of works W can be stacked on it. In the pallet moving device 11, as shown by a chain line in FIG. 3, an endless roller chain 24 is spanned in an oval shape, and a plurality of traveling platforms 22 are connected thereto. The roller chain 24 is stretched around a pair of sprockets 26 axially supported by arcuate portions at both ends in the longitudinal direction, and a moving motor is connected to one of the sprockets 26. 4 and 5 are a plan view and a perspective view showing the internal structure of the front part of the work stocker 7.

A plurality of rollers 25 are attached on the base 15 along an elliptical path, and a plurality of traveling bases 22 connected to a roller chain 24 are supported by the rotating rollers 25 to move. . In the pallet moving device 11, the plurality of traveling bases 22 connected to the roller chain 24 are moved all at once by the rotation control of the moving motor, and the predetermined pallet 21 is stopped at the delivery position P. The delivery position P is a position where the work W is delivered by the work transfer robot 4, and is provided at the end of the work stocker 7 in the longitudinal direction of the movement path. A work window 27 into which the work transfer robot 4 can enter is formed in the side wall of the machine body cover 16 so as to match the delivery position P in the range shown by the alternate long and short dash line in FIG.

The work W is transferred between the work stocker 7 and the work transfer robot 4 at a transfer position P defined on the moving route and at a constant transfer height. Therefore, the work stocker 7 is provided with a pallet elevating device 12 for elevating the pallet 21 stopped at the delivery position P along the positioning pins 23. The pallet raising / lowering device 12 is provided at the front end of the work stocker 7, and the support column 31 is vertically erected and fixed to the base 15. A slide rail is vertically fixed to the column 31 on a side surface inside the machine, and an elevating table 33 is slidably attached to the slide rail.

Also, in the pallet elevating device 12, a pair of sprockets are pivotally supported on the upper and lower sides of the pillar 31, and the elevating table 33 is connected to the elevating chain that is hung on the sprocket. An elevating motor is connected to the lower sprocket, and the drive control thereof adjusts the height of the elevating table 33 according to the feed amount of the elevating chain. A support plate 35 for lifting the pallet 21 from below is fixed to the lift table 33. The support plate 35 has a bifurcated shape and is configured to support and lift the peripheral edge portion of the circular pallet 21 from below at three positions on the left and right sides and the root portion.

In the work stocker 7, the work W is received from the work transfer robot 4 when the pallet 21 stopped at the delivery position P further rises to a predetermined height and stops. In the present embodiment, since five works W can be mounted on one pallet 21, the finished works W are sequentially carried and stacked on the empty pallet 21 stopped at the delivery position P. . Meanwhile, the coolant drips to the delivery position P from the work W to which a large amount of coolant has adhered immediately after processing.

In general, the work stocker is formed such that the movement path of the pallet is an ellipse as in this embodiment, and an oil pan for receiving the coolant is provided on the floor surface inside the machine body that is long in the front-rear direction. Also in the work stocker 7 of this embodiment, the oil pan 37 is formed in the entire machine. However, in the case of the work stocker, even if the coolant is received by the oil pan, the amount of the coolant that falls on the area is small. As described in the above problem, the amount of coolant dripping from the work W remains on the floor as it is. In addition, even if a certain amount of the dripping coolant was collected, it only spread laterally and only partially flowed to the drain passage, so it was not possible to recover it sufficiently. In this respect, it is conceivable to incline the oil pan 37, but it is impossible because the oil pan 37 itself is a floor surface on which various parts are attached.

Therefore, the oil pan 37 of the present embodiment is configured so that the dripping coolant is likely to accumulate. Specifically, a dam plate 38 is provided so as to partition a range corresponding to the delivery position P of the work W in the long oil pan 37 provided in the entire work stocker 7. The delivery position P is the place where the coolant is most likely to drop when the work W immediately after processing is introduced. By providing the dam plate 38 at that position, the coolant collecting portion 370 having a small area is formed in a part of the oil pan 37. The range indicated by cross hatching in FIG. 4 corresponds to the coolant recovery unit 370.

As shown in FIG. 3, the work stocker 7 has an elliptical shape in which the moving path of the pallet 21 has a narrow width interval in the straight line portion, and the moving path of the pallet 21 is located at the folding end on the front side of the machine body. The delivery position P is set. Therefore, the coolant recovery unit 370 is configured by the dam plate 38 that partitions the end portion of the elongated oil pan 37 into small parts. The barrier plate 38 is formed so as to avoid the rollers 25, the sprocket 26, and the like, and connect the side walls on both sides in the width direction of the oil pan 37. A drain passage 39 is provided in the coolant recovery section 370 surrounded by the side wall of the oil pan 37 and the dam plate 38.

Next, the operation and effect of the work stocker 7 having the above configuration will be described. In the work stocker 7, a plurality of pallets 21 are moved inside the machine by the pallet moving device 11, and the pallet 21 that receives the processed work W is positioned at the delivery position P. Specifically, the feed amount of the roller chain 24 is specified by the rotation control of the moving motor, and a predetermined one of the plurality of traveling bases 22 that move in unison stops at the delivery position P. Then, the pallet 21 arranged at the delivery position P is lifted to a predetermined height by the pallet lifting device 12.

Therefore, when the work W is delivered, the pallet 21 alone is positioned so that the top surface of the pallet is at the delivery height, and when the work W is mounted on the pallet 21, the work upper surface is at the delivery height. Are positioned so that Five works W are carried on the one pallet 21 at regular intervals and stacked in order. Therefore, the work W just after processing remains above the coolant recovery unit 370 until the five works W are mounted. Then, when the last work W is loaded, the elevating table 33 is lowered, and the driving of the pallet moving device 11 is started to call the next empty pallet 21. However, it is preferable that a larger amount of the coolant falls from the processed work W into the coolant recovery unit 370. Therefore, the calling timing may be delayed so that the work W remains at the delivery position P until the next work W is carried.

By the way, in the processing machine line 1 of the present embodiment, the work W, which has been processed at an interval of approximately 1 minute, is carried to the work stocker 7. Then, depending on the processed shape of the work W, for example, about 15 milliliters of coolant, that is, about 1 tablespoon of coolant, drips from one work W. In the case of the work stocker used so far, this amount of coolant remains on the oil pan as described above, and only a part of the coolant flows into the drain passage, so that the coolant cannot be sufficiently recovered.

In this respect, in the present embodiment, since the coolant collecting portion 370 that surrounds the delivery position P in a small size is configured, even if the coolant drips from the workpiece W little by little, As shown by cross-hatching in FIG. Therefore, evaporation of water from the coolant collected in the coolant recovery unit 370 is suppressed, and the collected coolant easily flows into the drain passage 39.

For example, the coolant recovery unit 370 of this embodiment is configured like a container having a height of the dam plate 38, that is, a depth of about 10 mm, and a volume of about 2 liters. As described above, when it is assumed that 15 ml of coolant drips in one minute, if the drain passage 39 is stored in a closed state, the coolant recovery unit 370 will be filled in about 2 hours. In this way, it can be said that the coolant recovery unit 370 has a size that allows the dripping coolant to easily accumulate. Therefore, even in a situation where about 15 milliliters of coolant drips every minute, the coolant is easily accumulated in the coolant recovery unit 370, and more coolant also flows into the drain passage 39. Therefore, the efficiency of collecting the coolant is significantly improved as compared with the conventional case.

Moreover, such an effect can be achieved by a simple configuration in which the dam plate 38 is provided on the conventional work stocker. In the work stocker 7, the oil pan 37 serving as the coolant receiver has a vertically long shape with a small width dimension corresponding to the moving range of the oval pallet 21. Therefore, by partitioning the longitudinal end portion of the oil pan 37 in the lateral width direction with the dam plate 38, it is possible to easily form the coolant collecting portion 370 which is a small container in which even a small amount of coolant is likely to accumulate. Further, in the work stocker 7, the delivery position P is set at the folded back end of the movement path of the pallet 21, which is also a factor in the simple formation of the coolant recovery unit 370.

Although one embodiment of the present invention has been described above, the present invention is not limited to these, and various modifications can be made without departing from the spirit of the present invention.
For example, as long as it has a configuration according to the present invention, it may be a work stocker having a different structure, and the work delivery position of the work from the autoloader may be different, or the shape of the dam plate partitioning the range corresponding to the delivery position may be different. It may be different.

1 ... Processing machine line 3 ... Machine tool 4 ... Work transfer robot 5 ... Relay device 7 ... Work stocker 11 ... Pallet moving device 12 ... Pallet elevating device 21 ... Pallet 24 ... Roller chain 33 ... Elevating table 35 ... Support plate 37 ... Oil Pan 38 ... Dam plate 39 ... Drain passage 370 ... Coolant recovery unit P ... Delivery position W ... Work

Claims

A pallet moving device that moves a plurality of pallets loaded with workpieces in a line around the pallet,
A coolant receiver provided corresponding to the moving range of the pallet,
A dam plate that is a part of the coolant receiver and partitions a range corresponding to the delivery position of the work provided on the moving path of the pallet,
A drain passage for discharging the coolant that falls into a range partitioned by the barrier plate,
Work stocker equipped with.
The coolant receiver has a vertically elongated shape corresponding to a moving range of the pallet having an oval shape, and the dam plate is provided so as to partition a longitudinal end portion of the coolant receiver in a lateral width direction. The work stocker described.
The work stocker according to claim 1 or 2, wherein the delivery position of the work is a folding position of a movement range of the pallet having an oval shape.