JP4036036B2 - Oil skimmer device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil skimmer device for recovering oil floating on a liquid surface from a tank containing a liquid such as cutting fluid, and in particular, an oil suitable for use in an environment where a plurality of tanks are provided under the floor. The present invention relates to a skimmer device.
[0002]
[Prior art]
At the time of cutting, a cutting fluid is used to lubricate and clean the processed part. Usually, the cutting fluid is stored in the tank, sent from the tank to the cutting machine, and after being used in the cutting machine, is returned to the tank and reused. Since oil such as lubricating oil is also used in the cutting machine, some oil is mixed in the cutting fluid returned from the cutting machine to the tank. Oil contamination can reduce machining accuracy and cause cutting fluid decay, so it is necessary to remove the oil, which is an impurity, from the cutting fluid in order to prevent deterioration of the cutting fluid and enable reuse. is there. Therefore, conventionally, an oil skimmer device for removing oil from the cutting fluid in the tank as disclosed in Japanese Patent Application Laid-Open No. 10-34144 and Japanese Patent Application Laid-Open No. 11-17935 is provided in a tank for storing cutting fluid. It is attached.
[0003]
The oil skimmer device is equipped with an endless belt made of a porous material such as felt. The oil is floated on the liquid surface by rotating the belt with a motor while part of this belt is hidden in the tank. It is attached to the belt together with the cutting fluid and pulled out of the tank. Then, after the liquid adhering to the belt is transferred to the separation tank and the cutting liquid and oil are separated in the separation tank, the cutting liquid is returned to the tank and only the oil is collected.
[0004]
[Problems to be solved by the invention]
Usually, the tank which stores cutting fluid is provided under the floor where processing machines, such as a cutting machine, are arranged, and the oil skimmer device is being fixed to the upper lid of the tank. Therefore, when a plurality of cutting machines are arranged and tanks are provided at a plurality of locations under the floor as in a relatively large factory, it is necessary to provide oil skimmer devices at a plurality of locations.
[0005]
However, if an oil skimmer device is provided for each tank, it costs a lot of money and occupies a large area for installation. In addition, oil recovery is not always performed by the oil skimmer device, and the operation time of the oil skimmer device is limited to a relatively short time of the entire factory operation time. This tank is wasteful both in terms of installation cost and installation area. Therefore, if one oil skimmer device can be shared among a plurality of tanks, the operation rate of the oil skimmer device can be increased, and the installation cost and the installation area can be reduced.
[0006]
The present invention has been devised in view of such problems, and an object thereof is to provide an oil skimmer device that can be shared among a plurality of tanks.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the oil skimmer device of the present invention is configured not to be fixed to the upper lid of the tank as in the prior art but to be freely movable on the floor. That is, the endless belt is suspended in a freely rotating state on a carriage equipped with moving wheels and movable on the floor, and the oil that adheres to the rotating device that rotates the endless belt on the carriage and the endless belt is collected from the endless belt. And an adjustment device that adjusts the depth at which the endless belt hangs down from the carriage when the endless belt is used . According to such a structure, the carriage is carried over the tank provided under the floor, and a part of the endless belt is submerged in the tank and rotated, so that the oil floating on the liquid level of the tank is transferred to the endless belt. It can be recovered by adhering. Further, after the oil is collected, the endless belt is pulled up and accommodated on the carriage by the belt accommodation device, so that the carriage can be moved over another tank and the oil in the tank can also be collected. That is, according to the oil skimmer device of the present invention, one oil skimmer device can be shared among a plurality of tanks. Further, by making it possible to adjust the depth at which the endless belt hangs down from the carriage, the endless belt can be surely immersed in the tank even when the distance from the floor surface to the liquid level in the tank varies. The depth at which the endless belt hangs down from the carriage can be easily adjusted, for example, by changing the position of a guide roller that guides the endless belt.
[0008]
As the belt accommodating device, a rotating member that rotates in a plane substantially parallel to the rotation plane of the endless belt about the rotating shaft attached to the carriage is provided, and the rotating member and the endless belt are sandwiched between the rotating shaft and the guide member. You may employ | adopt the structure which fixed. According to such a configuration, when the rotating body rotates, the endless belt is wound around the guide member and the rotating shaft and is wound on the carriage.
[0010]
More preferably, in addition to the above-described configuration, the movable pulley is suspended from the suspension portion of the endless belt. According to this, the endless belt can be tensioned by the dead weight of the moving pulley, and the endless belt can be reliably immersed in the tank by suppressing the looseness of the endless belt. Further, by applying tension, it is possible to suppress a change in the behavior of the endless belt during rotation.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing a configuration of an oil skimmer device as one embodiment of the present invention. As shown in FIG. 1, the oil skimmer device 1 of the present embodiment is integrated with a carriage 2 having a main body 1 a provided with casters (moving wheels) 3. A handle 2a is attached to the carriage 2, and the operator can freely move the floor 30 by pressing the handle 2a.
[0013]
In FIG. 1, the inside of the oil skimmer apparatus 1 of this embodiment is illustrated. An adjustment roller 5 is provided on the upper portion of the main body 1a. Handles (referred to as level adjustment handles) 6 are attached to the left and right ends of the shaft of the adjustment roller 5, and the level adjustment handles 6 are hooked in grooves 21 and 21 formed in the left and right side plates 20 and 20 of the main body 1a. (Only one side plate 20 is shown in the figure). The groove 21 has a shape opened obliquely upward, and a plurality (four in the figure) are provided in the vertical direction. The level adjustment handle 6 can be hung on any groove 21, and the vertical position of the adjustment roller 5 is changed by changing the groove 21 on which the level adjustment handle 6 is hung.
[0014]
The belt 4 for collecting oil from the tank 31 is suspended downward from the adjusting roller 5. The belt 4 has an endless shape, and a tension pulley 8 that is a moving pulley is hung on the suspended portion. The belt 4 is pulled in the vertical direction by the weight of the tension pulley 8. The belt 4 is preferably made of a material that easily absorbs or adheres oil, such as a porous material such as felt, or a net material such as a wire net or nylon net. The length of the belt 4 is adjusted so that the tension pulley 8 sinks below the liquid level 32 of the cutting fluid in the tank 31.
[0015]
The belt 4 is rotationally driven by the rotation of a pair of squeezing rollers 9 and 10 provided below the adjusting roller 5 in the main body 1a. The two squeezing rollers 9 and 10 are arranged close to each other, and the belt 4 is wound around the two squeezing rollers 9 and 10 in an S shape and is sandwiched between the squeezing rollers 9 and 10. One squeeze roller (drive-side squeeze roller) 9 is connected to a drive motor 11 by a chain 12 and rotates in conjunction with the rotation of the drive motor 11. The other squeezing roller (driven squeezing roller) 10 is pressed against the driving side squeezing roller 9 with the belt 4 interposed therebetween, and is rotated by receiving a driving force transmitted from the driving side squeezing roller 9 via the belt 4. It has become.
[0016]
The squeezing rollers 9 and 10 have a function as a collecting device that squeezes the oil-containing cutting fluid contained in the belt 4 and collects it in addition to the function as a rotating device that rotationally drives the belt 4. When the squeezing rollers 9 and 10 rotate, the belt 4 rotates in the direction of the arrow in the figure while submerging in the tank 31. At this time, the oil floating on the liquid surface adheres to the belt 4 together with the cutting fluid. However, the belt 4 is compressed from the front and back by the squeezing rollers 9 and 10, so that the oil-mixed cutting fluid adhered to the belt 4. Is squeezed out of the belt 4. The squeezed oil-mixed cutting fluid is received by a chute 13 disposed below the squeezing rollers 9 and 10 and is poured through the chute 13 into a separation tank 14 provided under the handle 2a. In the separation tank 14, the oil is separated from the cutting fluid, and the cutting fluid is returned to the tank 31 to collect only the oil.
[0017]
A belt winding drum 15 that rotates in a plane parallel to the rotation surface of the belt 4 is disposed at the lower portion of the main body 1 a of the oil skimmer device 1. The belt hoisting drum 15 includes a shaft (rotating shaft member) 16 supported by the left and right side plates 20 and 20 of the main body 1a, a rotating plate (rotating body) 17 that rotates together with the shaft 16, and a rotation. The plate 17 includes three guide rollers (guide members) 18A, 18B, and 18C attached to the outer peripheral portion of the plate 17 in parallel with the shaft 16. Although not shown in the drawing, a pair of rotating plates 17 are provided so as to sandwich the belt 4 from both the left and right sides, and the respective guide rollers 18A, 18B, 18C are connected to the left and right rotating plates 17, 17. The two guide rollers 18A and 18B are arranged close to each other, and another guide roller 18C is arranged apart from these guide rollers 18A and 18B. The belt 4 is passed between the two guide rollers 18A and 18B and the shaft 16 which are close to each other. A handle (not shown) is connected to the shaft 16 via a worm gear, and the belt hoisting drum 15 can be rotated in an arbitrary direction by turning the handle.
[0018]
The belt hoisting drum 15 functions as a belt accommodating device that accommodates the belt 4 in the main body 1a. FIG. 2 is a side view showing a form when the belt 4 is accommodated in the main body 1a using the belt winding drum 15. FIG. When the belt hoisting drum 15 is rotated counterclockwise in FIG. 1, the belt 4 is first applied to the guide roller 18 </ b> A, and then the belt 4 is also applied to the shaft 16. The belt 4 is pulled up by the guide roller 18A rotating upward around the shaft 16, and when the belt winding drum 15 is further rotated, the belt 4 is also wound around the guide rollers 18B and 18C. As the guide roller 18A, 18B, 18C rotates around the shaft 16, the belt 4 is further lifted upward and is housed in the main body 1a together with the tension pulley 8 as shown in FIG. A removable oil pan 19 is provided at the bottom of the carriage 2, and the belt 4 is accommodated in the main body 1 a and then covered with the oil pan 19, thereby dripping the liquid from the belt 4 to the floor 30. It can be prevented.
[0019]
Next, the usage method of the oil skimmer apparatus 1 is demonstrated using FIG.1 and FIG.2. The oil skimmer device 1 is suitable for use in a field where a plurality of tanks 31 are provided under the floor 30. First, as shown in FIG. 2, the belt 4 is accommodated in the main body 1a and is moved on the floor 30 to bring the oil skimmer device 1 onto the tank 31 for collecting oil. Since the oil skimmer device 1 is integrated with a cart with casters 3, the operator can move the floor 30 freely and easily by simply holding the handle 2a and pushing it.
[0020]
When the oil skimmer device 1 is brought up to the tank 31, the upper lid 33 of the tank 31 is removed and the oil pan 19 of the oil skimmer device 1 is removed. Then, the belt hoisting drum 15 is rotated in the clockwise direction in FIG. 2, and the belt 4 is lowered into the tank 31. Since the belt 4 is pulled in the vertical direction by the weight of the tension pulley 8, the belt 4 moves down without slack.
[0021]
When the belt hoisting drum 15 is rotated by a specified amount and the belt 4 is completely lowered, as shown in FIG. 1, the vertical position of the adjusting roller 5 is adjusted and the belt 4 hanging from the carriage 2 is inserted into the tank 31. Adjust the length. Since the level of the liquid level 32 in the tank 31 may be different for each tank 31, the vertical position of the adjustment roller 5 is adjusted so that the tension pulley 8 sinks below the liquid level 32. The vertical position of the adjusting roller 5 can be adjusted by changing the groove 21 on which the level adjusting handle 6 is hung. That is, the adjusting roller 5, the level adjusting handle 6, and the plurality of grooves 21 constitute an adjusting device that adjusts the depth at which the belt 4 hangs down from the carriage 2.
[0022]
When the adjustment of the vertical position of the adjustment roller 5 is completed, the drive motor 11 is operated to rotate the belt 4 and collect the oil from the tank 31. At this time, since the belt 4 is tensioned by the tension roller 8, the slack is suppressed and the behavior change during rotation can be suppressed. Further, the length of the belt 4 immersed under the liquid surface 32 is adjusted to an appropriate length depending on the vertical position of the adjusting roller 5, so that the oil floating on the liquid surface 32 can be reliably collected.
[0023]
When the oil has been collected, the drive motor 11 is stopped to stop the rotation of the belt 4. Then, the level adjusting handle 6 is hooked on the uppermost groove 21 to rotate the belt winding drum 15 in the counterclockwise direction in the drawing, and the belt 4 is wound up in the main body 1 a of the oil skimmer device 1. When the belt 4 is completely wound up and accommodated in the main body 1a, the oil pan 19 is attached to the bottom of the carriage 2 to cover it, and the opening of the tank 31 is also covered with the upper cover 33.
[0024]
Thus, the oil recovery operation in the tank 31 is completed. In the case where a plurality of tanks 31 are provided under the floor 30, the oil skimmer device 1 is moved over the tank 31 that performs oil recovery next, and the above-described operation is performed again. According to the oil skimmer device 1 of the present embodiment, the belt 4 can be accommodated in the main body 1a and moved on the floor 30, so that one oil skimmer device 1 is shared among a plurality of tanks 31. Can do.
[0025]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the embodiment, a caster is provided as a moving wheel so that the wheel can freely move on the floor. However, a rail that connects the tank to the floor may be laid so that the wheel moves along the rail. Further, in this embodiment, the operator pushes the handle to move the oil skimmer device. However, the oil skimmer device may be provided with a power device such as a motor so that the oil skimmer device can run on its own.
[0026]
【The invention's effect】
As described above in detail, according to the oil skimmer device of the present invention, the endless belt is pulled up and stored on the cart by the belt storing device, so that the cart is moved above another tank and the oil in the tank is stored. Can also be recovered, and there is an advantage that one oil skimmer device can be shared among a plurality of tanks.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram showing a form when oil is collected by an oil skimmer device according to an embodiment of the present invention.
FIG. 2 is a view showing a configuration of the oil skimmer device according to the embodiment of the present invention when the belt is accommodated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Oil skimmer apparatus 1a Oil skimmer apparatus main body 2 Cargo 2a Handle 3 Caster 4 Belt 5 Adjust roller 6 Level adjustment handle 8 Tension pulley 9, 10 Drawing roller 11 Drive motor 13 Chute 14 Separation tank 15 Belt winding drum 16 Shaft 17 Rotating plate 18A, 18B, 18C Guide roller 19 Oil pan 20 Side plate 21 Groove 30 Floor 31 Tank

Claims (3)

In an oil skimmer device that immerses a part of a rotating endless belt in a tank provided under the floor and collects the oil floating on the liquid level of the tank by attaching it to the endless belt,
A carriage that is suspended in a state in which the endless belt is freely rotatable and is movable on the floor with a moving wheel;
A rotating device provided on the carriage for rotating the endless belt;
A collecting device that is provided on the carriage and collects oil adhering to the endless belt from the endless belt;
A belt accommodating device which accommodates pulling the endless belt onto the carriage when not in use the endless belt is provided on the carriage,
An oil skimmer device, comprising: an adjusting device that adjusts a depth at which the endless belt hangs down from the carriage when the endless belt is used . The belt accommodating device is:
A rotating shaft member attached to the carriage,
A rotating body that rotates in a plane substantially parallel to a rotation plane of the endless belt around the rotating shaft member;
The rotating shaft member and the guide member fixed to the rotating body so as to sandwich the endless belt,
2. The oil according to claim 1, wherein the endless belt is wound around the guide member and the rotating shaft member by the rotation of the rotating body and is wound on the carriage. Skimmer device. The oil skimmer device according to claim 1 or 2 , wherein a moving pulley is suspended from a suspension portion of the endless belt.

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