JP2002204944A - Apparatus for discharging contents from drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of discharging the stowed semisolid or solid contents from a drum to the outside without fail irrespectively of the kind of the contents. SOLUTION: The apparatus 10 for discharging the contents from drum provided with a means 14 for supporting the drum 12, a rotary shaft 48 that is capable of being inserted into the drum 12 from the end of the opening of the drum 12 supported by the means 14 and is rotated, and a scraper 46 attached to the front end of the rotary shaft 48 in a manner in which the margins of the edges radiate so as to scrape the contents off the drum, is characterized in that the margins of the edges of the scraper plate 46 form the shape of a wave composed of mounts and valleys and are asymmetrical. By giving such a shape to the scraper 46, it is possible to reduce the contact area between the margins of the edges and the contents, to therefore reduce the force against the margins, and finally, the load on the source of rotation drive, and to prevent the apparatus from undergoing drive stop.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for discharging contents such as sludge and sludge packed in a drum.

[0002]

2. Description of the Related Art Substances such as sludge and sludge generated when cleaning storage tanks and the like in production equipment and processing equipment are usually stored in drums and transferred to processing facilities and the like as necessary. Processing is performed.

[0003] The contents are taken out from the inside of the drum in a treatment facility or the like. However, the contents such as sludge and sludge have a high sticking property and are in a semi-solid state or a solid state in the drum, so that it is difficult to take out the contents manually. It is. Therefore, a drum content discharging device (hereinafter, also simply referred to as a “discharging device”) has been used.

As shown in FIG. 4, a conventional general discharge device includes a rotary shaft 2 having a scraper 1 attached to a tip end thereof.
The rotating shaft 2 is rotated and moved forward, whereby the contents in the drum 3 are scraped off by the scraping plate 1. A screw blade 4 is provided on the shaft of the rotary shaft 2. The contents scraped off by the scraper 1 are transferred from the inside of the drum 3 to the outside as the screw blades 4 rotate, and are discharged.

[0005]

However, there are several problems with the conventional drum can discharging apparatus as described above.

[0006] First, depending on the type of contents to be discharged, the driving device 5 for rotationally driving the rotary shaft 2 may be overloaded and stopped. Further, the contents scraped off by the scraping plate 1 may be aggregated during transfer by the screw blades 4 to form a large mass, which may not be discharged. When such a problem occurs, manual discharge work is required.

Accordingly, an object of the present invention is to provide a discharge device capable of reliably discharging semi-solid or solid contents packed in a drum can to the outside regardless of the type.

[0008]

Means for Solving the Problems In order to achieve the above object, the present inventors have conducted various studies, and as a result, have found that one of the causes of the above-mentioned problem is the scraper. In other words, the blade edge of the scraper used in the conventional discharging device is straight and perpendicular to the rotation axis of the rotating shaft. Therefore, when scraping the surface of the content, the entire blade edge of the scraper is removed. Touches the contents. For this reason, depending on the type of content,
The entire cutting edge can penetrate deep into the contents, putting excessive load on the scraper and the drive that drives the rotating shaft.

Further, the content scraped off by the scraping plate as described above has a wide and long band shape. Therefore, when the content is sent to the screw blade, it is likely to be folded and formed into a large ball shape.
It is considered that the cause of the consolidation of the transferred material is that the screw blade is formed of a single continuous body, and the scraped contents are not shredded by the blade.

The present invention has been made on the basis of such knowledge, and has a support means for supporting a drum, and a rotary drive which can be inserted into the drum from an open end of the drum supported by the support means. A rotating shaft, and a scraping means attached to the tip of the rotating shaft such that the blade edge extends radially to scrape the contents of the drum.
The edge of the blade is formed into a waveform consisting of a peak and a valley, and the distance between each peak at the edge of the blade extending in one direction and the rotation axis of the rotary shaft is determined by the peak at the edge of the edge extending in the other direction. The distance between the rotary shaft and the rotation axis is different.

As described above, the blade edge of the scraping means such as a scraping plate is formed into a waveform, and the trajectory of each peak at the blade edge extending in one direction and each peak at the blade edge extending in the other direction is determined. By avoiding the complete coincidence, the contact area between the blade edge of the scraping means and the contents can be reduced, and the reaction force against the blade edge and, consequently, the load on the drive source of the rotating shaft can be reduced.

The supporting means for supporting the drum can supports the drum can in an inclined state such that the opening end of the drum can faces downward, and rotatably supports the drum can with a central axis as a rotation axis. It is effective. When the drum can is supported obliquely downward, a part of the liquid in the drum and the contents scraped off by the scraping means are discharged to the outside from the downward opening end by the action of gravity, and the drum can itself is rotated. This makes it possible to efficiently scrape the entire contents by the scraping means.

Although contents may remain on the inner peripheral surface of the drum can, it is preferable to provide a paddle having a scraper plate at the tip end for scraping off the attached matter on the shaft of the rotary shaft. Such a paddle, unlike a continuous screw blade, allows the contents scraped by the scraping means to be discharged to the outside without growing into a lump.

In order to reduce the reaction force from the deposit on the inner peripheral surface of the drum can, it is preferable that the edge of the blade of the scraper is also corrugated.

[0015]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view showing an embodiment of a drum can discharging device according to the present invention, and FIG. 2 is a plan view showing a drum supporting device in the discharging device of FIG. As shown in the figure, the discharge device 10 includes a support device (support means) 14 for supporting the drum 12. Supporting device 1
Reference numeral 4 denotes a support roller 16 for supporting the outer peripheral surface of the drum 12. The support rollers 16 are fixed to both ends of two rotating shafts 18 arranged in parallel with each other. The rotating shaft 18 is rotatably supported by a support frame 20. An electric motor 22 is fixed to the support frame 20, and an output shaft of the electric motor 22 is connected to the rotating shaft 18 by a suitable transmission mechanism 24 such as a chain transmission mechanism. Therefore, by controlling the drive of the electric motor 22, the rotation shaft 18 and, consequently, the support roller 16 can be driven to rotate.

The support frame 20 is swingably attached to a base 26 of the discharge device 10. More specifically, a gantry 28 is erected on the base 26, and a rotating shaft 32 is provided between bearings 30 provided at the upper end thereof.
Are rotatably supported and extend horizontally. The support frame 20 is fixed to the rotating shaft 32. An output shaft of an electric motor 36 is connected to one end of the rotating shaft 32 via a suitable transmission mechanism 34. Therefore,
By controlling the drive of the electric motor 36, the rotary shaft 32 is driven to rotate in both forward and reverse directions, and the support frame 20 and the support roller 16 are also moved to the initial position and the discharge position shown by the solid line in FIG. (See drum 12 shown)
Rocked between.

In the state of the initial position, a rod-shaped support member 37 for supporting the lower end of the drum 12 extends substantially horizontally from the lower central portion of the support frame 20. A swing rod 38 is swingably attached to the tip of the support member 37. 1 at the upper end of the swing rod 38
A pair of holding rollers 40 are mounted so as to face the support roller 16, and a hydraulic cylinder 42 is provided between the lower end of the swing rod 38 and the support member 37. When the hydraulic cylinder 42 is hydraulically controlled, the hydraulic cylinder 42
The swing rod 38 swings due to the expansion and contraction of the piston rod. Thus, the drum can 12 placed on the support member 37 can be pressed against the support roller 16 by the pressing roller 40. In this state, even when the support frame 20 is swung to the discharge position, the drum can 12 is supported by the support roller. 16 and the pressing roller 40 can be securely held. Further, since the support roller 16 is driven to rotate by the electric motor 22 as described above, the support roller 1
6 and the drum 12 supported by the pressing roller 40 can be driven to rotate in a state where the discharge position is inclined.

The discharge device 10 in the illustrated embodiment
Is provided in relation to the roller conveyor 44 for transporting the drum 12. That is, a portion where one roller is removed is formed at an appropriate position of the roller conveyor 44, and the support member 37 of the support device 14 at the initial position is arranged there. As a result, the drum 12 transported by the roller conveyor 44 is supported by the support member 37 of the support device 14.
As a result, the drum 12 can be directly transferred from the roller conveyor 44 to the discharge device 10.

Here, the drum 12 is supported by the support device 14.
Is supported and the support device 12 is located at the discharge position (the state shown by the two-dot chain line in FIG. 1). In this state, a scraping plate (scraping means) 46, which is a main component of the discharging device 10, is disposed at a position facing the downward opening end of the drum 12. Scraper 46
Is attached to a tip end of a rotary shaft 48, and the rotary shaft 48 is rotatably driven by an electric motor 50 as a drive source via a suitable transmission mechanism, for example, a chain transmission mechanism 52.

The electric motor 50 is fixed to a carriage 56 running on a rail 54 installed between one end of the base 26 and the upper end of the gantry 28. The rail 54 extends substantially parallel to the center axis of the drum 12 in the inclined state (see the two-dot chain line in FIG. 1). The carriage 56 is provided with a bearing 58, and the rotating shaft 48 is rotatably supported by the bearing 58. The rotation axis of the rotation shaft 48 supported by the bearing 58 of the carriage 56 is also substantially parallel to the center axis of the inclined drum 12.

In the illustrated embodiment, the carriage 56 is
6 is moved forward and backward along the rail 54 by a hydraulic cylinder 60 attached to the lower part of the motor 6. That is, when the piston rod 62 of the hydraulic cylinder 60 is retracted, the carriage 56 moves toward the drum 12 via a chain 64 stretched between the piston rod 62 and the carriage 56, and when the piston rod 62 is extended, The trolley 56 has its own weight and the drum 12
It moves in a direction away from it.

As described above, the scraping plate 46 is attached to the tip of the rotating shaft 48. In the illustrated embodiment, the scraping plate 46 is formed of a single plate, and is disposed substantially in a direction perpendicular to the center axis of the rotating shaft 48 so as to pass through the center axis. As can be seen from FIG. 3, which is an enlarged view of the scraper 46,
The blade edge of No. 6 has a waveform consisting of a triangular peak and a valley. The shape of the cutting edge at a portion (hereinafter, referred to as "one side portion") 46a extending in the one centrifugal direction from the center axis C of the rotating shaft 48, and at the other portion (hereinafter, referred to as "other side portion") 46b extending in the centrifugal direction. The shape of the cutting edge is asymmetric. In other words, the distance from the center axis C to the vertices P1, P2, P3, and P4 of the ridges of the blade edge is different between the one side portion 46a and the other side portion 46b. Further, the length of the one side portion 46a and the other side portion 46b of the scraping plate 46 are also different.

The length of the longer portion, that is, the maximum rotation radius of the circle drawn when the scraper 46 is rotated, is determined according to the size of the drum 12 to be used. For example, when a plurality of sizes of drums 12 are used, the maximum turning radius of the scraper 46 is larger than the radius of the drum 12 having the largest diameter among the used drums 12,
It is selected to be smaller than the diameter of the drum 12 having the minimum diameter.

The shaft of the rotary shaft 48 is provided with a plurality of paddles 6 instead of the conventional continuous screw blade.
6 are provided at appropriate intervals. The tip of each paddle 66 is a small scraping plate 68.
Reference numeral 8 is mainly provided for scraping off the contents adhering to the inner peripheral surface of the drum 12. Therefore, it is preferable that the length from the rotating shaft 48 to the blade edge of the scraping plate 68 is equal to or slightly longer than the maximum rotation radius of the scraping plate 46. Also, the edge of the blade of the scraping plate 46 is
In order to reduce the contact portion with the contents and reduce the reaction force, it is preferable that the waveform has a peak portion and a valley portion.

Reference numeral 70 denotes a chute, which receives the contents discharged from the drum 12 and guides the contents of the drum to a belt conveyor 72 arranged below the base 26.

The operation of the drum content discharging device 10 according to the present invention in such a configuration will be described below.

First, before operation, the support device 14 and the carriage 56 are placed at the initial positions indicated by solid lines in FIG. In this state, the drum 12, which is filled with solid or semi-solid contents and is open at the upper end, is transported by the roller conveyor 44, and is transported between the support roller 16 and the press roller 40 of the support device 14. (See the two-dot chain line in FIG. 2). Next, the hydraulic cylinder 42 is controlled to swing the swing rod 38 in the direction of arrow A, and the pressing roller 40 is brought into contact with the outer peripheral surface of the drum 12. Further, when the swing rod 38 is swung in the same direction, the drum 12 is held between the press roller 40 and the support roller 16 (the state shown by the solid line in FIG. 1). Thereafter, when the electric motor 36 is controlled to swing the support frame 20 in the direction of arrow B, the drum 12 is supported by the support frame 20 with its lower end supported by the support member 37.
And finally stops at the discharge position indicated by the two-dot chain line in FIG. In this state, the open end of the drum 12 is slightly downward, and faces the scraper 46. If there is a liquid in the drum 12, the liquid flows down from the opening end of the drum 12.

Next, the electric motor 22 is driven to rotate the support roller 16, and the drum 12 is rotated. Also,
At the same time, the electric motor 50 is started to rotate the rotary shaft 48 and rotate the paddle 66 and the scraper 46. When the hydraulic cylinder 60 is hydraulically controlled and its piston rod 62 is retracted, the truck 56 is pulled via the chain 64 and moves along the rail 54 toward the drum 12.

Eventually, the edge of the blade of the rotating scraping plate 46, particularly the top of the peak, comes into contact with the surface of the contents in the drum 12, and the contents are gradually scraped off. In this initial stage, since the edge of the blade of the scraping plate 46 is corrugated, the contact portion between the scraping plate 46 and the contents is small, and the reaction force acting on the scraping plate 46 from the contents is small. Therefore, the electric motor 5
The load on zero is also small.

When the carriage 56 is further moved to the side of the drum 12, the contact portion between the scraper 46 and the contents increases, but the waveform of the blade edge of the scraper 46 is formed asymmetrically. Since the portion scraped by the one side portion 46a of the scraping plate 46 during one rotation of the scraping plate 46 does not contact a part of the other side portion 46b (particularly, the valley of the cutting edge), the entire cutting edge is completely contained. It does not come into contact with things. FIG. 3 illustrates this state in an explanatory manner. The state of FIG.
2 was not rotated and the scraper 46 was not fed,
As can be seen from this figure, the groove 74 on the surface of the content previously formed by the one-side portion 46a corresponds to the X1, X2
It can be seen that the contact portion of the other side portion 46b is reduced because the portion indicated by. Therefore, the scraper 4
Even if 6 is digging the contents, the load acting on the electric motor 50 is maintained in a relatively small state, and stable cutting can be performed.

The contents adhered to the inner peripheral surface of the drum 12 are not scraped off by the scraper 46,
By adjusting the positions of the drum 12 and the rotating shaft 48, the scraper 68 of the paddle 66 can scrape off. In order to send the contents scraped off by the scraping plate 68 to the side of the opening end of the drum 12,
8 is preferably attached at a predetermined angle to the rotation direction.

A part of the contents scraped by the scrapers 46 and 68 in this manner falls to the outside from the downward opening end of the drum 12, and a part adheres again to the inner peripheral surface of the drum 12. . The contents adhering to the inner peripheral surface of the drum can 12 are scraped off by the scraping plate 68 of the paddle 66 as described above, or, since the drum can 12 is rotating, the inside of the drum can 12 Peeled from the peripheral surface and discharged to the outside. The content discharged from the drum 12 to the outside is sent from the chute 70 to the belt conveyor 72.

The contents scraped off by the scraper 46 are divided into two at the apex of each peak, so that the contents are formed into a narrow band. For this reason, even if a continuous screw blade is provided on the shaft portion of the rotary shaft 12, the formation of a large ball during transfer of the screw blade is suppressed. In the present embodiment, since the paddle 66 is attached instead of the screw blade, the cut-out and band-shaped contents are finely divided by the paddle 66 and discharged to the outside of the drum 12 in a small form. . Moreover, since the drum 12 is rotated, the groove 74 formed at the peak of the blade edge of the scraping plate 46 does not draw a circle, and the peak of the groove 74 may intersect the groove 74. Also in this case, the content to be cut does not have a long strip shape, but is cut out discontinuously.
The finely divided contents do not grow into large chunks and are discharged to the outside of the drum 12.

Although the preferred embodiments of the present invention have been described in detail, it goes without saying that the present invention is not limited to the above embodiments.

For example, in the above embodiment, the shape of the edge of the blade of the scraping plate has a triangular waveform, but may have a shape such as a sine waveform or a rectangular waveform.

In the above embodiment, one scraping plate 46 is used.
Is used to constitute the scraping means, but a plurality of scraping plates may be radially attached to the tip of the rotating shaft. In this case, the distance between each peak at the blade edge of at least one scraping plate and the rotation axis of the rotating shaft is
When the distance between each peak of the other scraping plate and the rotation axis of the rotary shaft is different, the load acting on the electric motor is reduced.

[0038]

As described above, according to the present invention, when the contents of a drum can are discharged by rotating a scraping means such as a scraping plate, the edge of the blade of the scraping means has a waveform and an irregular shape. Thus, the load acting on the drive source of the scraping means can be reduced, and the problem that the rotation of the scraping means stops can be solved.

In addition to the special shape of the scraping means, a paddle is provided on the shaft of the rotating shaft, so that the scraped contents do not grow into a large ball. , Can be discharged from the drum to the outside.

Therefore, the contents discharging operation can be automatically and stably performed, and the operation of manually discharging the contents is unnecessary.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a drum content discharging device according to the present invention.

FIG. 2 is a plan view showing a drum supporting device in the discharging device of FIG.

FIG. 3 is an explanatory perspective view showing an effect of an asymmetric scraping plate.

FIG. 4 is a side view showing a conventional general drum can discharging device.

[Explanation of symbols]

10: Drum can discharge device, 12: Drum, 14
... Supporting device (supporting means), 46 ... Scraping plate (scraping means), 48 ... Rotating shaft, 50 ... Electric motor (drive source), 54 ... Rail, 56 ... Dolly, 66 ... Paddle, 68
... Scraping board, 70 ... Shoot.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B116 AA28 AB14 AB33 AB42 BA03 BA14 4G068 AA07 AB13 AC16 AC20 AD01 AD32

Claims (4)

[Claims] 1. A supporting means for supporting a drum, a rotating shaft which can be inserted into the drum and is driven to rotate from an open end of the drum supported by the supporting means, and for scraping the contents of the drum. Scraping means attached to the tip of the rotary shaft such that the cutting edge extends radially, wherein the cutting edge has a waveform consisting of peaks and valleys, and the cutting edge extends in one direction. Wherein the distance between each of the peaks and the rotation axis of the rotary shaft is different from the distance between each of the peaks and the rotation axis of the rotary shaft at the blade edge extending in another direction. Drum contents discharging device. 2. The supporting means supports the drum in an inclined state such that the open end of the drum can faces downward, and rotatably supports the drum with a center axis as a rotation axis. Claim 1 characterized by the following:
A device for discharging the contents of a drum can described in 1. 3. The shaft according to claim 1, wherein a paddle having a scraper at a tip thereof for scraping off the contents adhered to the inner peripheral surface of the drum can is provided on the shaft of the rotary shaft. A device for discharging the contents of a drum as described above. 4. The device according to claim 3, wherein the edge of the blade of the scraping plate is corrugated.