JP5873386B2 - Charging device - Google Patents

Description

  The present invention relates to a charging apparatus, and relates to an apparatus for charging a charged material into a container such as a blast furnace.

Conventionally, in a blast furnace for iron making, a charging device is used as equipment for charging a charged material into the furnace. A similar charging device is also used when filling the contents of containers such as other reaction furnaces, reaction towers, and catalyst containers.
In such a charging device, it is required that the charged material be in a desired state, for example, the circumferential distribution of the charged material in the container is made uniform. For this reason, in the charging device, it is required to freely control the spraying direction and the spraying state of the charged material, and various spraying mechanisms have been developed.

As a charging device, the applicant of the present application has installed a rotor that rotates around the pivot axis of the chute and a holder that rotates around an adjustment axis that is supported by the pivot mechanism and that is inclined with respect to the pivot axis. The structure which supported the chute which spreads a charging material in the state inclined with respect to the adjustment axis | shaft is proposed (refer patent document 1).
In such Patent Document 1, normally, the chute is rotated at a constant inclination angle by rotating these rotors and holders synchronously, and the inclination angle of the chute is adjusted by rotating the holder relative to the rotor. can do.

  In FIG. 9, the charging device 1 of Patent Document 1 is installed at the top of the blast furnace 2 in order to spray the charge mainly composed of iron ore and coal into the blast furnace, and swivels into the frame 3. The rotor 4 is supported by the bearing 431 so as to be rotatable around the turning axis D1, the holder 5 is supported by the rotor 4 so as to be rotatable around the adjustment axis D2, and is fixed to the holder 5. And a chute 6 extending along the chute center axis D3.

  The turning axis D <b> 1 is an axis in the vertical direction and coincides with the central axis of the blast furnace 2. The adjustment axis D2 intersects the turning axis D1 at the point O, and the intersecting angle with each other is the first angle A1. The chute center axis D3 intersects the adjustment axis D2 at the point O described above, and the intersecting angle with each other is the second angle A2. The chute center axis D3 defines the direction in which the charge sprinkled from the chute 6 is sprinkled into the furnace, and the direction is usually the bottom direction of the truncated cone shape of the chute 6. In the actual apparatus, the central axis D3 ′ of the cylinder constituting the chute 6 may be set somewhat apart from the chute central axis D3 described above, but the same as the distribution direction of the charge. it can.

The rotor 4 is driven by the turning drive mechanism 7 including the turning drive motor 70, and rotates about the turning axis D <b> 1 with respect to the frame 3. The holder 5 is driven by the adjustment drive mechanism 8 including the adjustment drive motor 80 and rotates around the adjustment axis D <b> 2 with respect to the rotor 4.
In a state in which the drive from these drive mechanisms 7 and 8 is synchronized, the rotor 4 and the holder 5 rotate integrally around the turning axis D1 (turning operation).
On the other hand, when a phase difference occurs in the drive from the drive mechanisms 7 and 8, the holder 5 rotates around the adjustment axis D2 with respect to the rotor 4, thereby adjusting the inclination angle of the chute 6 with respect to the turning axis D1. (Adjustment action).

  In the adjustment operation, the holder 5 rotates about the adjustment axis D <b> 2 with respect to the rotor 4. That is, the chute 6 (chute central axis D3) rotates around the adjustment axis D2 while maintaining the second angle A2 with respect to the adjustment axis D2, and the point P at the tip opening of the chute 6 moves in a circle along the locus L2. . By this rotation, the direction of the chute center axis D3 with respect to the turning axis D1 (that is, the direction with respect to the frame 3) changes, and the chute center axis D3 swings from the state indicated by the alternate long and short dash line in the figure to the left side in the figure. Thereby, the inclination angle of the chute 6 can be adjusted.

In the turning operation, the holder 5 and the rotor 4 are integrated, rotate around the turning axis D1 with respect to the frame 3, and the point P at the tip of the chute 6 turns along the locus L1.
In the state shown by the solid line, the chute 6 has an inclination angle in which the chute center axis D3 forms a maximum angle with respect to the turning axis D1, and the locus L1 of the point P of the tip opening at the time of turning becomes the maximum. The spreading radius of objects is also maximized.
Here, an adjustment operation is performed, the holder 5 is rotated with respect to the rotor 4, and the chute center axis D3 is rotated around the adjustment axis D2, thereby reducing the angle of the chute center axis D3 with respect to the turning axis D1. The trajectory L1 is gradually reduced, and the distribution radius of the charge is also gradually reduced.
Therefore, by appropriately controlling the rotation of the holder 5 and the rotor 4 as described above, it is possible to perform the raw material swirling with a predetermined radius and to adjust the spraying radius as required.

The first angle A1 at which the turning axis D1 and the adjustment axis D2 intersect is, for example, 20 degrees, and the second angle A2 at which the adjustment axis D2 and the chute center axis D3 intersect is, for example, 20 degrees. It is the same as the angle A1. For this reason, when the chute center axis D3 is located at the leftmost position in the drawing due to the rotation of the holder 5, the chute center axis D3 coincides with the turning axis D1, and the radius of the locus L1 becomes zero.
In such a configuration, by using the separate drive motors 70 and 80 for the rotor 4 and the holder 5 and individually controlling the rotation, the turning operation and the inclination angle adjustment are performed without using the differential mechanism. be able to. That is, by rotating the rotor 4 and the holder 5 synchronously, and accurately rotating the rotor 4 and the transmission-side bevel gear 82 connected to the holder 5 in the configuration of FIG. 9, the tilt angle of the chute 6 is changed to the current angle. The tilt angle of the chute 6 can be adjusted by giving a difference in the rotational speed of the rotor 4 and the transmission side bevel gear 82 (see paragraphs 0038 and 1 of Patent Document 1). FIG. 1, paragraph 0047 and FIG. 15).

International Publication No. 2011/043454

  By the way, in the above-described charging device of Patent Document 1, the load fluctuation of the drive mechanism that rotates the holder is large, and therefore it is difficult to increase the accuracy of the adjustment operation, and the durability of the bearing that rotatably supports the holder on the rotor. There was a problem that it was difficult to raise.

In the charging device disclosed in Patent Document 1 (see FIG. 9) described above, the holder rotates around the adjustment axis D2 with respect to the rotor, and the tip of the chute fixed to the holder draws a locus L2. The adjustment axis D2 is inclined with respect to the swivel axis D1, which is generally vertical, and the locus L2 centering on the adjustment axis D2 makes a round in the plane inclined with respect to the horizontal plane.
The holder has a shape close to a cylindrical shape with the axis D2 as the central axis, and its center of gravity is close to the adjustment axis D2, but the chute is fixed so that its tip is separated from the adjustment axis D2. Is at a position away from the adjustment axis D2. Therefore, the center of gravity G1 that combines the holder and the chute rotating around the adjustment axis D2 is also located away from the adjustment axis D2.
Therefore, when the holder and the chute rotate around the adjustment axis D2, the center of gravity G1 including the chute and the holder follows a circular locus L3 that goes around the plane inclined with respect to the horizontal plane in the same manner as the locus L2 of the chute tip. The height of the center of gravity changes up and down as it goes around.

Here, in the charging apparatus of patent document 1, the drive mechanism containing drive sources, such as a motor which rotates a holder and a chute | shoot for adjustment operation | movement, is used. Since the motor, which is a drive source, circulates the center of gravity G1 including the chute and the holder in the above-described plane inclined with respect to the horizontal, a heavy load is applied when lifting the center of gravity G1 in a part of the locus. In other sections, the center of gravity G1 is lowered, so the load is reduced. As a result, when the holder and the chute rotate around the adjustment axis D2, the fluctuation of the driving torque necessary for moving the center of gravity G1 up and down is unavoidable.
Thus, if there is a fluctuation in the required driving torque, there is a problem that it is difficult to control the inclination angle of the chute with high accuracy.

Further, a moment due to the gravity of the chute and the holder acts on the adjustment bearing 55 (see FIG. 9). The moment arm of this moment is the length of the line connecting the center point that is the intersection of the rotation plane of the adjustment bearing and the adjustment axis D2, and the center of gravity of the chute and the holder. Here, the center of gravity G1 of the chute and the holder rises and falls according to the position on the locus L3 (orientation about the adjustment axis D2) because the circular locus L3 around the adjustment axis D2 is inclined with respect to the horizontal plane. It is displaced to. As a result, the inclination angle of the moment arm of the center of gravity G1 changes along with the rotation on the locus L3, and the magnitude of the component perpendicular to the moment arm of gravity also changes. Accordingly, the magnitude of the gravitational moment acting on the adjustment bearing 55 varies depending on the inclination angle of the holder and the chute.
That is, when the chute is in the maximum application radius, that is, when the angle between the moment arm and the vertical axis is maximum, the maximum moment acts on the adjustment bearing 55. On the other hand, when the chute is directed downward along the turning axis D1, the angle between the moment arm and the vertical axis is minimized, and the moment acting on the adjustment bearing 55 is minimized. That is, the moment acting on the adjustment bearing 55 varies while the chute and the holder make a round around the adjustment axis D2.
The moment due to the gravity of the chute and the holder acting on the turning bearing 431 is the product of the distance R1 between the turning axis D1 and the center of gravity G1 of the chute and the holder and the acting gravity. Since the distance R1 changes depending on the inclination angle of the holder and chute, the moment acting on the turning bearing 431 also changes while the chute and holder make a round around the adjustment axis D2.
Thus, there is a problem that the life of the bearing is shortened due to repeated fluctuation of the moment acting on the bearing.

  An object of the present invention is to provide a charging device that can suppress fluctuations in driving torque in the adjusting operation and can increase the durability of the bearing of the adjusting mechanism.

  The charging device of the present invention includes a frame, a turning shaft set on the frame, a rotor supported by the frame and rotatable about the turning shaft, and a rotor set on the turning shaft. An adjustment shaft that intersects at an angle, a holder that is supported by the rotor and is rotatable about the adjustment shaft, a chute that is fixed to the holder and extends in a direction that intersects the adjustment shaft at a second angle, And a drive mechanism for rotating the rotor with respect to the frame and rotating the holder with respect to the rotor, wherein a direction in which a tip of the chute extends is opposite to the adjustment shaft. A counterweight fixed to the chute, wherein the counterweight is an adjustment shaft rotating portion that combines the holder, the chute and the counterweight. Distance between the center of gravity and the adjustment shaft, characterized in that there is a weight and arranged to be less than half the distance between the center of gravity and the adjusting shaft of the adjusting shaft portion not including the counterweight.

In the present invention, since the holder has a shape close to a cylindrical shape with the adjustment shaft as the central axis, the center of gravity of the holder is in the vicinity of the adjustment shaft, whereas the chute is in a direction in which the tip side is away from the adjustment shaft. Since it extends, the center of gravity of the chute is at a position away from the adjustment axis. Accordingly, the center of gravity of the holder and the chute is located away from the adjustment axis.
However, in the present invention, a counterweight is installed on the rotating portion of the adjustment shaft, and this counterweight is fixed to the chute on the opposite side of the adjustment shaft from the direction in which the tip of the chute extends. If the weight and arrangement are appropriately set, the center of gravity of the adjustment shaft rotating portion, that is, the holder, the chute and the counterweight can be brought close to the vicinity of the adjustment shaft.
The weight and arrangement of the counterweight can be adjusted in consideration of the holder and chute to be applied and the entire charging apparatus including them.

According to the present invention as described above, since the center of gravity of the adjustment shaft rotation portion is disposed on or near the adjustment shaft, the holder, chute, and counterweight, which are the adjustment shaft rotation portions, perform adjustment operations on the adjustment shaft. Even if it rotates to the center, the displacement in the vertical direction of the center of gravity of the adjusting shaft rotating portion combined with these can be prevented or slight.
As a result, when the adjustment shaft rotating portion rotates around the adjustment shaft, the vertical displacement of the center of gravity can be eliminated or reduced, and fluctuations in drive torque in the drive mechanism can be eliminated or reduced. Accordingly, it is possible to control the inclination angle of the chute with high accuracy.
Furthermore, since the center of gravity of the rotating portion of the adjusting shaft has a distance from the adjusting shaft of zero or slight, fluctuations in the inclination angle of the moment arm and fluctuations in the distance between the pivot axis and the center of gravity can be made zero or slight. As a result, the moment variation acting on the adjusting bearing and the turning bearing can be made zero or slight, and the life of the bearing can be extended.

In the present invention, it is preferable that the center of gravity of the rotating portion of the adjusting shaft is disposed close to the center of a bearing that supports the holder so as to be rotatable about the adjusting shaft with respect to the rotor.
In the present invention, the length of the moment arm acting on the adjusting bearing can be shortened, so the moment acting on the adjusting bearing is reduced and the life can be extended. Further, since the distance between the turning shaft and the center of gravity can be shortened, the moment acting on the turning bearing is also reduced, and the life can be extended.

  In the present invention, the adjustment shaft rotating portion has an auxiliary counterweight fixed to the holder on the opposite side of the adjustment shaft with respect to the direction in which the tip of the chute extends, and the auxiliary counterweight is the holder The distance between the center of gravity of the adjustment shaft rotating portion that combines the chute, the counterweight, and the auxiliary counterweight and the adjustment shaft is the distance between the center of gravity of the adjustment shaft rotating portion that does not include the counterweight and the adjustment shaft. It is desirable that the weight and the arrangement be less than half of the distance.

  In such an invention, since the separate auxiliary counterweight is fixed to the holder, the distance from the center of the adjustment bearing is closer than the counterweight fixed to the chute, so the center of gravity of the adjustment shaft rotating portion is Compared with the center of gravity when the auxiliary counterweight is not used, the center of the adjustment bearing is closer, and the length of the moment arm and the distance between the pivot axis and the center of gravity are shortened. As a result, the moment acting on the adjusting bearing and the turning bearing can be further reduced.

In the present invention, it is desirable that the counterweight also serves as a heat shielding plate surrounding a part of the chute.
In the present invention, the counterweight also serves as a heat shielding plate, so that a part of the chute to which the counterweight is fixed can be surrounded and protected from the heat in the blast furnace.
The portion with the highest temperature near the top of the blast furnace is near the central axis of the blast furnace. When the chute is at the maximum inclination angle, the counterweight is arranged near the central axis of the blast furnace.
By setting the standby state of the chute to the state of the maximum inclination angle, the heat resistance performance of the chute can be improved by having a counterweight that also serves as a heat shielding plate at the highest temperature part.

1 is a longitudinal sectional view showing a first embodiment of the present invention. The longitudinal cross-sectional view which shows the state with the minimum inclination | tilt angle of the chute | shoot of the said 1st Embodiment. End view showing the S1-S1 cross section of FIG. A longitudinal sectional view showing a second embodiment of the present invention The longitudinal cross-sectional view which shows 3rd Embodiment of this invention. The longitudinal cross-sectional view which shows the state with the minimum inclination | tilt angle of the chute | shoot of the said 3rd Embodiment. End view showing the S2-S2 cross section of FIG. End view showing the S3-S3 cross section of FIG. The longitudinal cross-sectional view which shows a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 to 6 show a first embodiment of the present invention.
In FIG. 1, a charging device 1 </ b> A of the present embodiment has the same configuration as the charging device 1 of Patent Document 1 described above as a basic configuration.
That is, a frame 3 at the top of the furnace of the blast furnace 2, a rotor 4 that revolves around the revolving axis D1, a holder 5 that revolves around the adjusting axis D2, a chute 6 that is fixed to the holder 5 and extends along the chute central axis D3, A turning drive mechanism 7 that rotates the rotor 4 by the turning drive motor 70 and an adjustment drive mechanism 8 that rotates the holder 5 by the adjustment drive motor 80 are provided. These configurations are the same as those described with respect to the charging device 1 of Patent Document 1, and the same components are denoted by the same reference numerals and redundant description is omitted, and the specific configuration of the present embodiment will be described below. .

In the present embodiment, a counterweight 11 is fixed to the chute 6.
The counterweight 11 is fixed to a portion that is opposite to the direction in which the tip of the chute 6 extends with respect to the adjustment axis D2.
The center of gravity G1 of the holder 5 that does not include the counterweight 11 that rotates around the adjustment axis D2 and the chute 6 is shifted to the tip side of the chute 6 with respect to the adjustment axis D2.

  In the present embodiment, since the position of the counterweight 11 fixed to the chute 6 is opposite to the direction in which the tip of the chute 6 extends with respect to the adjustment axis D2, the holder 5, the chute 6 and the counterweight 11 are aligned. The center of gravity G2 of the adjusting shaft rotating portion 19 is on the adjusting shaft D2.

1, 2, and 3, the counterweight 11 includes a partial cylindrical surface-shaped outer peripheral member 111 centering on the adjustment axis D <b> 2, a lower surface material 112 and an upper surface material 113 that cover the upper and lower surfaces, and a side material that covers the side surfaces. 114, and inner edges of the lower surface material 112, the upper surface material 113, and the side surface material 114 are fixed along the outer peripheral surface of the chute 6.
The outer peripheral member 111, the lower surface material 112, the upper surface material 113, and the side surface material 114 are adjusted in material, thickness, and the like so as to obtain a desired weight balance as the counterweight 11.
The counterweight 11 is formed in a box shape by the outer peripheral member 111, the lower surface material 112, the upper surface material 113, and the side surface material 114.
A heat insulating material is stretched inside the counterweight 11 to suppress heat in the furnace transmitted to the base end portion 60 of the chute 6.

  In this embodiment, since the center of gravity G2 of the adjustment shaft rotation portion 19 is localized on the adjustment axis D2 by the counterweight 11, when the adjustment shaft rotation portion 19 rotates around the adjustment axis D2, The vertical displacement of the center of gravity G2 can be eliminated, and fluctuations in the driving torque of the adjustment mechanism can be eliminated. Accordingly, the control (adjustment operation) of the inclination angle of the chute 6 can be performed with high accuracy.

Further, in the present embodiment, the counterweight 11 can make the fluctuation of the moment acting on the adjustment bearing 55 and the turning bearing 431 zero, thereby extending the life of the adjustment bearing 55 and the turning bearing 431. it can.
That is, regarding the moment acting on the adjustment bearing 55, when the counterweight 11 is not provided, the center of gravity of the adjustment shaft rotating portion 19 is G1, and the moment arm thereof is M1.
When the adjustment shaft rotating portion 19 rotates around the adjustment axis D2, the moment acting on the adjustment bearing 55 varies because the inclination angle of the moment arm M1 changes. At this time, since the distance R1 between the turning axis D1 and the center of gravity G1 also changes, the moment acting on the turning bearing 431 also changes.

However, in the present embodiment, the counterweight 11 causes the center of gravity G2 of the adjustment shaft rotation portion 19 to be on the adjustment axis D2, and even if the adjustment shaft rotation portion rotates around the adjustment axis D2, the moment arm M2 tilt angle and the turning The distance R2 between the axis D1 and the center of gravity G2 does not change.
For this reason, the fluctuation of the moment acting on the adjusting bearing 55 and the turning bearing 431 becomes zero, and the life of the adjusting bearing 55 and the turning bearing 431 can be extended.

[Second Embodiment]
FIG. 4 shows a second embodiment of the present invention.
The charging device 1A of the present embodiment has the same configuration as that of the first embodiment described above. For this reason, the overlapping description is abbreviate | omitted about a common structure and a different part is demonstrated below.
As shown in FIG. 4, in the present embodiment, the fixed position of the counterweight 11 is set such that the position of the center of gravity G2 of the adjustment shaft rotating portion 19 is a point O1 (adjustment point) on the adjustment axis D2 as compared with the first embodiment. It is changed to the base side (upper left direction in the figure) of the chute 6 so as to be a position close to the center of the bearing 55.
Thereby, since the length of the moment arm M2 becomes shorter than that of the first embodiment, the moment acting on the adjustment bearing 55 is reduced, and the life of the adjustment bearing 55 can be extended.
Further, since the length of the distance R2 between the turning axis D1 and the center of gravity G2 is also shorter than that in the first embodiment, the moment acting on the turning bearing 431 is also reduced, and the life of the turning bearing 431 can be extended.

[Third Embodiment]
5 to 8 show a third embodiment of the present invention.
The charging device 1B of this embodiment has the same configuration as that of the first embodiment described above. For this reason, the overlapping description is abbreviate | omitted about a common structure and a different part is demonstrated below.
As shown in FIGS. 5 and 6, in this embodiment, in addition to the counterweight 11, two auxiliary counterweights 12 </ b> A and 12 </ b> B are installed.
The auxiliary counterweights 12A and 12B are arranged such that the position of the center of gravity G3 of the adjusting shaft rotating portion 19 is closer to the point O1 on the adjusting shaft D2 that is the center of the adjusting bearing 55 compared to the second embodiment. The fixed position is selected and installed.
Further, while the counterweight 11 is fixed to the chute 6, the auxiliary counterweights 12A and 12B are fixed on the holder.

Accordingly, the center of gravity G3 of the adjusting shaft rotating portion 19 to which the auxiliary counterweights 12A and 12B are added has a moment arm M3 whose length is shorter than that of the second embodiment, so that the moment acting on the adjusting bearing 55 is increased. The life of the adjustment bearing 55 can be extended.
Further, since the length of the distance R3 between the turning axis D1 and the center of gravity G3 is also shorter than that in the second embodiment, the moment acting on the turning bearing 431 is also reduced, and the life of the turning bearing 431 can be extended.

  As shown in FIGS. 5, 6, and 7, the auxiliary counterweight 12 </ b> A is an arc-shaped weight and is installed between the upper flange 51 and the lower flange 52 that constitute the holder 5, and the arc-shaped center is adjusted. It is aligned with the axis D2. When the auxiliary counterweight 12A is fixed, the upper and lower edges thereof are welded to the upper flange 51 and the lower flange 52, respectively, and both ends thereof are welded to the ribs 53 connecting the upper flange 51 and the lower flange 52, thereby securing the auxiliary counterweight 12A. Is to be done.

As shown in FIGS. 5, 6, and 8, the auxiliary counterweight 12 </ b> B is an arc-shaped weight and is fixed to the outer periphery of the adjustment bearing 55.
These auxiliary counterweights 12 </ b> A and 12 </ b> B are adjusted in material, thickness, and the like so as to obtain a desired weight balance as a counterweight combined with the counterweight 11.

In the present embodiment, the weights of the auxiliary counterweights 12A and 12B and the counterweight 11 are set as follows.
That is, the center of gravity G3 of the adjustment shaft rotating portion 19 including the counterweight 11 and the auxiliary counterweights 12A and 12B as a whole is on the adjustment axis D2 and the adjustment axis D2 with respect to the center of gravity G1 of the holder 5 and the chute 6 combined. The weight settings of the auxiliary counterweights 12A and 12B and the counterweight 11 are adjusted so as to be as high as possible, preferably near the intersection O or the point O1 that is the center of the adjustment bearing 55.
In the adjustment, it is necessary to consider each installation space, but in order to realize a position as high as possible on the adjustment axis D2, the auxiliary counterweights 12A and 12B are increased and the counterweight 11 is reduced. It is desirable to adjust the balance by repeating.

Furthermore, since the counterweight 11 can be used for heat insulation protection of the base end portion of the chute 6, the life of the chute 6 can be extended.
Further, since the auxiliary counterweight 12 is divided and installed in the auxiliary counterweights 12A and 12B, the necessity for a large installation space can be eliminated, and the gaps of the existing structure can be effectively used.
In particular, the auxiliary counterweight 12A uses the space between the upper flange 51 and the lower flange 52, which is the basic configuration of the holder 5, and therefore does not have a portion that protrudes with installation.
Further, since the auxiliary counterweight 12B uses the outer periphery of the adjustment bearing 55, it is possible to minimize overhanging with installation, and it is not necessary to prepare a separate support structure.

[Modification]
The present invention is not limited to the above-described embodiments, and specific configuration of each part and the like can be modified as appropriate in implementation.
In each of the above-described embodiments, these configurations can be appropriately changed. For example, the gear configuration of the transmission mechanism may be other transmission means or the like, and the drive motors 70 and 80 are used for the drive mechanisms 7 and 8. The phase difference may be detected by an angle detector. In short, any configuration that can perform a turning operation and an adjustment operation in the rotor and the holder can be used as appropriate.
In addition, the detailed configuration and the like of each of the embodiments described above may be changed as appropriate, and the inclination setting described above (the first angle A1 between the turning axis D1 and the adjustment axis D2 and the second angle between the adjustment axis D2 and the chute center axis D3). Any structure capable of obtaining A2) can be used as appropriate in the present invention.

  The present invention relates to a charging device and can be used as a device for charging a charged material into a vessel such as a blast furnace.

DESCRIPTION OF SYMBOLS 1A, 1B ... Charging device 2 ... Blast furnace 3 ... Frame 4 ... Rotor 5 ... Holder 6 ... Chute 7 ... Turning drive mechanism 8 ... Adjustment drive mechanism 11 ... Counterweight 12A, 12B ... Auxiliary counterweight 19 ... Adjustment shaft rotation part A1 ... first angle A2 ... second angle D1 ... swivel axis D2 ... adjustment axis D3 ... chute center axis G1, G2, G3 ... center of gravity of rotating part of adjustment axis M1, M2, M3 ... moment arm of center of gravity R1, R2, R3 ... Center of gravity distance from the pivot axis

Claims (4)

A frame, a turning axis set in the frame, a rotor supported by the frame and rotatable about the turning axis, and an adjustment axis set in the rotor and intersecting the turning axis at a first angle A holder supported by the rotor and rotatable about the adjustment shaft; a chute fixed to the holder and extending in a direction intersecting the adjustment shaft at a second angle; and rotating the rotor relative to the frame And a drive mechanism for rotating the holder with respect to the rotor,
A direction in which the tip of the chute extends has a counterweight fixed to the chute on the opposite side across the adjustment shaft;
The counterweight is such that the distance between the center of gravity of the adjusting shaft rotating portion including the holder, the chute and the counterweight and the adjusting shaft is the distance between the center of gravity of the adjusting shaft rotating portion not including the counterweight and the adjusting shaft. A charging device characterized by its weight and arrangement so that it is less than half of the distance. The charging device according to claim 1,
The charging device according to claim 1, wherein a center of gravity of the rotating portion of the adjusting shaft is disposed in the vicinity of a center of a bearing that rotatably supports the holder with respect to the rotor about the adjusting shaft. The charging device according to claim 1 or 2,
The adjustment shaft rotating portion has an auxiliary counterweight fixed to the holder on the opposite side of the adjustment shaft from the direction in which the tip of the chute extends,
The auxiliary counterweight is an adjustment shaft rotation portion in which a distance between the center of gravity as the adjustment shaft rotation portion combining the holder, the chute, the counterweight and the auxiliary counterweight and the adjustment shaft does not include the counterweight. A charging device characterized in that it has a weight and an arrangement so that it is less than half of the distance between the center of gravity of the adjusting shaft and the adjusting shaft. The charging device according to any one of claims 1 to 3,
The charging device according to claim 1, wherein the counterweight also serves as a heat shielding plate surrounding a part of the chute.

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