JP7080021B2 - Agricultural work machine - Google Patents

Description

The present invention relates to an agricultural work machine provided with a cabin that covers the driver's seat, such as a combine or tractor.

Taking a combine as an example of an agricultural work machine, Patent Document 1 includes an engine under the cabin and an exhaust gas purifying device for purifying exhaust gas from the engine, and compares exhaust gas from the exhaust gas purifying device with a traveling machine. A technique is shown with an exhaust pipe that guides backwards at a low position and exhausts outwards.

Japanese Unexamined Patent Publication No. 2013-1

As described in Patent Document 1, in the configuration in which the exhaust gas is guided to the rear at a relatively low position of the traveling machine by the exhaust pipe, the heat of the high temperature exhaust gas affects the crop in the uncut area and the high temperature exhaust pipe. It was also considered that the mud in the field adhered to the exhaust pipe and the deterioration of the exhaust pipe was promoted.

For this reason, there is a demand for agricultural work machines capable of suppressing the adhesion of mud and the like to the exhaust pipe and improving the durability of the exhaust pipe while suppressing the influence of heat on crops and the like.

The features of the present invention are a cabin in which a driver's seat is arranged, an engine arranged in a lower region of the cabin, and an exhaust gas arranged in the lower region to reduce particulate matter contained in exhaust gas from the engine. It is equipped with a treatment device and an exhaust pipe that sends out the exhaust gas from the exhaust gas treatment device upward.
The exhaust pipe is supported by the cabin, and the cover covering the exhaust pipe is supported by the cabin by a structure different from that of the exhaust pipe.
A concave groove extending in the vertical direction is formed on the outer wall of the cabin, the exhaust pipe is arranged along the concave groove, and the cover is arranged at a position covering the exhaust pipe .

According to this characteristic configuration, the exhaust gas discharged from the exhaust gas treatment device is sent upward by the exhaust pipe and discharged from a high position of the traveling machine body, so that the exhaust gas can be diffused at a high position. Moreover, since the exhaust pipe is supported by the cabin, the posture of the exhaust pipe is stable. Further, since the cover covering the exhaust pipe is supported by the cabin by a structure different from that of the exhaust pipe, the cover can be firmly supported. For example, the cover is supported with respect to the exhaust pipe via a bracket or the like. Compared with, it is also possible to suppress the temperature rise of the cover.
Therefore, an agricultural work machine capable of suppressing the adhesion of mud and the like to the exhaust pipe and improving the durability of the exhaust pipe while suppressing the influence of heat on crops and the like has been constructed.

As another configuration, the exhaust pipe may be arranged in a region surrounded by the cabin and the cover in a plan view.

In this configuration, in plan view, the exhaust pipe can be surrounded by the cabin and cover.

As another configuration, the exhaust pipe is composed of a first pipe body for sending exhaust gas from the exhaust gas treatment device and a second pipe body arranged on the downstream side of the first pipe body, and the exhaust gas from the first pipe body. The relay point for passing the exhaust gas to the second tube body may be covered with the cover.

In this configuration, even if the total length of the exhaust pipe is long, the first pipe body and the second pipe body can be attached by independent work, and the attachment work becomes easy. In particular, in this configuration, since the exhaust pipe is divided into two, it is possible to configure the exhaust pipe so that the outside air can be sucked by the ejector effect at the relay position between the first pipe body and the second pipe body. As a result, not only the exhaust gas can be diluted, but also the temperature rise of the exhaust pipe can be suppressed.

As another configuration, the exhaust pipe forms a first bent portion on the lower end side and a second bent portion on the upper end side, and the first bent portion, the second bent portion, and the first bent portion are formed. The intermediate portion between the 1 bent portion and the second bent portion may be covered with the cover.

In this configuration, since the entire region from the first bent portion to the second bent portion is covered with a cover, even if either one of the first bent portion and the second bent portion has a shape of protruding to the outside, the protruding portion It is possible to protect the protrusion, and it is also possible to suppress the inconvenience that the operator accidentally contacts the protrusion.

As another configuration, a concave groove portion extending in the vertical direction is formed on the outer wall of the cabin, the exhaust pipe is arranged along the concave groove portion, and the cover may be arranged at a position covering the exhaust pipe.

According to this, since the exhaust pipe can be arranged so as to sink into the concave groove portion of the outer wall of the cabin, the exhaust pipe and the cover do not protrude outward from the outer wall surface of the cabin.

As another configuration, a cabin in which a driver's seat is arranged, an engine arranged under the cabin, an exhaust gas treatment device for treating exhaust gas from the engine, and exhaust gas from the exhaust gas treatment device are upward. It is equipped with an exhaust pipe that sends out to
The exhaust pipe is supported by the cabin, and the cover covering the exhaust pipe is supported by the cabin by a structure different from that of the exhaust pipe.
The roof of the cabin is provided with an overlapping portion that projects outward so as to cover the upper part of the exhaust pipe and the cover, and the downstream portion of the exhaust pipe is pulled out to the outside of the cover. A notch may be formed at the upper end of the cover.

According to this, since the roof of the cabin covers the upper part of the exhaust pipe, it is not necessary to place a cover in this part, and in order to pull out the downstream part of the exhaust pipe from the notch at the upper end of the cover, the upper end of the cover is the cabin. By arranging it near the lower surface of the roof, the exposed part of the exhaust pipe can be reduced, and the inconvenience of accidental touch by the operator can be prevented.

It is a left side view of the combine. It is a right side view of the combine. It is a plan view of a combine. It is a side view which shows the arrangement of an engine, an exhaust gas purification device, and an exhaust pipe. It is a rear view which shows the arrangement of an engine, an exhaust gas purification device, and an exhaust pipe. It is a side view of an exhaust pipe. It is a rear view of an exhaust pipe. It is a top view of the exhaust pipe.

Hereinafter, an embodiment of the combine, which is an example of the agricultural working machine according to the present invention, will be described with reference to the drawings. In this embodiment, as shown in FIGS. 1, 2, and 3, the direction in which the machine travels during harvesting work is defined as the machine front side F, and the opposite direction is defined as the machine rear side B, and the operator defines the machine. The direction on the right side of the worker in the posture toward the front side F is defined as the right side R of the machine, and the left side L of the machine in the opposite direction is defined as the right side of the machine.

〔overall structure〕
Figures 1, 2 and 3 show a normal combine as an agricultural work machine according to the present invention. This combine can harvest crops such as rice, wheat, buckwheat, soybeans and corn.

This combine has a cutting unit 2 for harvesting crops, a driving unit 6 having a cabin 5, and a driving unit having a diesel engine 44 (hereinafter, abbreviated as an engine) with respect to the traveling machine 1 traveling by the crawler traveling device 3. A combine is configured with 7 (see FIGS. 4 and 5), a threshing device 8 for threshing the harvested crops, and a grain tank 9 for storing the grains obtained by threshing.

The traveling machine body 1 is provided with a machine body frame 4, a pair of left and right crawler traveling devices 3 is provided on the machine body frame 4, and a cutting portion 2 is provided at the front end of the machine body frame 4 so as to be able to move up and down. The driving unit 6 is arranged on the right side of the front portion of the traveling machine body 1, and the driving unit 7 is arranged below the driving unit 6. The threshing device 8 is arranged on the left side of the traveling machine 1, and the grain tank 9 is arranged on the right side of the traveling machine 1 so as to be parallel to the threshing device 8 in the left-right direction.

The driver unit 6 includes a driver's seat 10, a meter panel 11, a side panel 12, a steering lever 13, and the like, which are arranged in the internal space of the cabin 5. A door 14 that allows passengers to get on and off is provided on the right side of the cabin 5 so as to be openable and closable. The side panel 12 is provided on the left side of the driver's seat 10 which is opposite to the door 14. The side panel 12 is provided with a working clutch lever and the like in addition to the main shift lever 15.

The cabin 5 is provided with a windshield 31 and has a left wall 32 having a glass window portion that can be opened and closed on the left side, a door 14 described above on the right side, and a rear wall 33 having a glass window portion on the rear side. The roof 34 is arranged at a position covering them.

In the harvesting section 2, a pair of left and right dividers 17 for dividing the planted crop into a harvested target and a non-cutting target, a scraping reel 18 for scraping the planted crop, and a stock source of the planted crop are provided. A clipper-type cutting device 19 for cutting, an auger 20 for collecting the cut crops toward the center in the cutting width direction, and a feeder 21 for transporting the cut crops to the threshing device 8 are provided.

The threshing device 8 performs a threshing process on the transported cut crops by a handling cylinder 22 provided in the handling chamber and a receiving net (not shown) provided below the handling cylinder 22. A sorting unit 23 provided in the lower part of the handling chamber performs a sorting process of separating the threshed product leaking from the receiving net into grains and waste straw waste. The rear part of the body of the threshing device 8 is provided with a waste straw shredding device 24 that shreds the waste straw waste and discharges it downward and outward.

As shown in FIGS. 1, 2, and 3, the threshing device 8 transports the grains obtained by the sorting process by the sorting unit 23 to the outside on the right side of the threshing device 8 by the first product transport screw 27. , The bucket conveyor type threshing device 25 supplies the grain tank 9 from above. Further, the second item such as paddy with branches collected at the lower part of the threshing device 8 is conveyed to the outside on the right side of the threshing device 8 by the second item transfer screw 28, and this second item is transferred to the sorting unit 23. A second product reducing device 26 for reducing is provided.

The lower part of the grain tank 9 is provided with a bottom screw 30 for transporting the stored grains to the rear (see FIG. 2). The rear part of the grain tank 9 is provided with a grain discharging device 29 for discharging the grains conveyed by the bottom screw 30 to the outside. The grain discharge device 29 includes a vertical screw conveyor 29A that transports grains upward, and a horizontal screw conveyor 29B that laterally conveys grains from the upper end of the vertical screw conveyor 29A and discharges the grains from the discharge port at the tip. And have.

As shown in FIGS. 4 and 5, the engine room 43 is formed by the engine bonnet 42 in the driving unit 7. The engine bonnet 42 separates the engine room 43 from the driving space, and the driver's seat 10 is arranged above the engine bonnet 42.

[Exhaust gas purification device]
As shown in FIGS. 4 and 5, in the engine room 43, the engine 44, the radiator 45 for cooling the engine, the cooling fan 46 for generating the cooling air supplied to the radiator 45, the first exhaust gas purifying device 47, and the second It is equipped with an exhaust gas purification device 48.

The exhaust gas discharged from the engine 44 is supplied to the first exhaust gas purification device (DPF) 47 and then to the second exhaust gas purification device (SCR) 48. These are arranged on the upper part of the engine 44 in a state of being integrated with the engine 44.

The first exhaust gas purification device 47 and the second exhaust gas purification device 48 are examples of the exhaust gas treatment device. The exhaust gas treatment device may be configured as a single device or may be a unitized device of three or more devices.

The first exhaust gas purification device 47 performs treatment when the particulate matter (PM) (Particulate Matter) contained in the exhaust gas of the engine 44 is reduced, and is a known technique for collecting the diesel particulates contained in the exhaust gas. A Diesel Particulate Filter (not shown) is provided, and particulate matter (PM) is reduced by passing exhaust gas through the Diesel Particulate Filter (DPF).

The second exhaust gas purification device 48 performs a process of reducing nitrogen oxides (NOx) contained in the exhaust gas by using SCR (Selective Catalytic Reduction) (selective catalytic reduction). To add an explanation, urea water, which is an example of a reducing agent, is injected into the exhaust gas and hydrolyzed to generate ammonia, and the ammonia (NH3) and nitrogen oxides (NOx) contained in the exhaust gas are chemically reacted. Then, a treatment is performed to reduce the nitrogen oxides contained in the exhaust gas by reducing the nitrogen (N2) and water (H2O).

As shown in FIGS. The treated exhaust gas is sent out from the exhaust delivery unit 50 on the rear side to the relay pipe 48B of the second exhaust gas purification device 48.

The second exhaust gas purification device 48 includes a second exhaust gas purification device main body 48A and a relay pipe 48B. In the relay pipe 48B, by injecting urea water from the injection nozzle 53 into the internal space, the exhaust gas mixed with the urea water is sent to the front side. The front end of the relay pipe 48B is connected to the exhaust receiving portion 51 at the front end of the second exhaust gas purifying device main body 48A, and the second exhaust gas purifying device main body 48A purifies and purifies the exhaust gas supplied from the relay pipe 48B. The rear exhaust gas is sent upward from the exhaust discharge portion 52 at the upper part of the rear end.

As described above, by providing the first exhaust gas purification device 47 and the second exhaust gas purification device 48, fine particles contained in the exhaust gas discharged from the engine 44 are removed, nitrogen oxides are reduced, and the purified gas is used. Discharge. As the urea water supplied to the injection nozzle 53, the urea water stored in the urea water tank (not shown) is used.

〔Exhaust pipe〕
As shown in FIGS. 4 to 8, the lower end of the exhaust pipe EP is connected to the exhaust discharge unit 52 provided in the second exhaust gas purification device 48. The exhaust pipe EP is a first pipe body 61 that sends the exhaust gas from the second exhaust gas purification device 48 (exhaust gas treatment device) upward, and a second pipe that is arranged on the first pipe body 61 and is arranged on the downstream side in the flow direction of the exhaust gas. It is configured to include a body 62 and a third pipe body 63 connected to the downstream side of the second pipe body 62. An exhaust guide plate 64 for determining the exhaust gas discharge direction is provided at the downstream end of the third pipe body 63. Further, an exhaust pipe cover 65 (an example of a cover) that partially covers the first pipe body 61 and the second pipe body 62 is provided at the rear position of the cabin 5.

In this exhaust pipe EP, a metal pipe material is used for the first pipe body 61 and the second pipe body 62, and a pipe material having a hexagonal cross section is used as the third pipe body 63 by bending the metal material. A metal plate is used for the exhaust guide plate 64.

In particular, the exhaust pipe EP is formed by cutting out a part of the left side wall 32 and the rear wall 33 on the left side of the rear part of the cabin 5 in a plan view of the first pipe body 61 and a part of the second pipe body 62. The first pipe body 61, a part of the second pipe body 62, and the exhaust pipe cover 65 are arranged below the roof 34 of the cabin 5. That is, the exhaust pipe accommodating space S is formed as a concave groove portion extending in the vertical direction on the outer wall of the cabin 5, and the roof 34 of the cabin 5 is overlaid so as to cover the space above the exhaust pipe accommodating space S. A wrap portion is formed.

The upper end of the exhaust exhaust portion 52 is provided with an exhaust pipe 66 in a posture of being connected to the flange portion and being vertically inclined slightly outward. The upper end portion of the first pipe body 61 is set to a vertical posture so that the first discharge opening 61A at the upper end opens upward, and the lower end portion bends along the posture of the discharge pipe 66. 1 The bending portion C1 is provided, and the first introduction opening 61B whose diameter increases toward the lower side with respect to the lower end position of the first pipe body 61 is formed.

The second pipe body 62 includes a second bent portion C2 that bends so that the downstream side in the flow direction of the exhaust gas is in a posture toward diagonally upward rearward, and is intermediate on the upstream side of the second bent portion C2. The portion is set to a vertical posture, and a second introduction opening 62B whose diameter is increased toward the lower side is formed on the lower side (upstream side) of the intermediate portion so that the upper end portion of the first pipe body 61 can be inserted.

As shown in FIG. 8, the first pipe body 61 and the second pipe body 62 are arranged at positions behind the rear wall surface Sr of the exhaust pipe accommodating space S, and the first pipe body 61 and the second pipe are arranged. The body 62 is supported by a bracket 67 that is independent of the rear wall surface Sr. In particular, the bracket 67 supports only the exhaust pipe, and the exhaust pipe cover 65 is supported by the cabin 5 by a different structure.

This different structure means that the exhaust pipe cover 65 is supported in the cabin without using the structure for supporting the exhaust pipe cover 65 in the cabin 5 (bracket 67 shown in FIGS. 6, 7, 8 and the like). The cage exhaust pipe EP does not include a structure that supports the exhaust pipe cover 65. Thereby, in the embodiment, a structure for supporting the exhaust pipe cover 65 to the cabin 5 (bracket 67 shown in FIGS. 6, 7, 8 and the like) and a structure for supporting the exhaust pipe cover 65 to the cabin 5 (FIG. 6, 6, 8 and the like). It is different from the support bolt 72) shown in 7, 8 and so on.

As shown in FIGS. It is configured to include a second member 67b that is position-adjustably supported with respect to the member 67a, and a position fixing bolt 67c that fixes the position of the second member 67b with respect to the first member 67a.

Each second member 67b is provided with a connecting surface that is parallel to the rear wall surface Sr of the exhaust pipe accommodating space S, and a fixing bolt 68 is inserted into the bolt insertion holes of these connecting surfaces to be inserted into the rear wall surface Sr. By fastening and fixing to the fixed support plate 69, the first pipe body 61 and the second pipe body 62 are supported by the cabin 5.

In this configuration, since the bracket 67 is configured to be able to adjust the positional relationship between the first member 67a and the second member 67b, the positional relationship between the first tube body 61 and the second tube body 62 with respect to the rear wall surface Sr is adjusted. Then, these can be arranged in an appropriate position.

A plurality of mounting pieces 70 are welded and fixed to the opening edge of the second discharge opening 62A of the second pipe body 62. A mounting bolt 71 is inserted into each of the plurality of through holes formed in the third pipe body 63, and these mounting bolts 71 are screwed into the threaded portion of the mounting piece 70, whereby the third pipe body 63 is formed. It is supported by the second tube body 62. Further, the third pipe body 63 is arranged outside the exhaust pipe cover 65.

The exhaust guide plate 64 is fixed to the rear end of the third pipe body 63, and the exhaust guide plate 64 has a positional relationship in which the exhaust guide plate 64 projects slightly rearward from the rear end of the roof 34 of the cabin 5.

As shown in FIGS. 6, 7, and 8, the exhaust pipe cover 65 is configured to be able to be arranged in a region extending from the left side wall 32 to the rear wall 33 of the cabin 5 by bending the metal plate into an L shape in a plan view. A notch 65a through which an end portion (rear end portion) on the downstream side of the second pipe body 62 is inserted is formed at the upper end of the exhaust pipe cover 65.

The side surface of the exhaust pipe cover 65 configured in this way is fixed to the intermediate frame 32a of the left side wall 32 of the cabin 5 by a plurality of support bolts 72, and the rear surface is fixed to the intermediate member of the rear wall 33 of the cabin 5 by the plurality of support bolts 72. By fixing to 33a, the exhaust pipe cover 65 is supported by the cabin 5. As a configuration in which the exhaust pipe cover 65 is supported by the cabin 5, the side surface of the exhaust pipe cover 65 is directly fixed to the left side wall 32, and the rear surface is directly fixed to the rear wall 33 of the cabin 5. May be.

When the exhaust pipe cover 65 is supported by the cabin 5, the first bent portion C1 and the second bent portion C2 of the exhaust pipe EP and the relay portion as an intermediate portion between them are covered with the exhaust pipe cover 65. ..

The first introduction opening 61B is arranged in a state where the first pipe body 61 and the second pipe body 62 are supported at a fixed position with respect to the cabin 5 so as to form a gap between the first pipe body 61 and the upper end of the discharge pipe 66. Will be done. The ejector effect is obtained at the site of the first introduction opening 61B. Further, at the relay point of the upper end of the first pipe body 61 with the first discharge reel 61A, the second introduction opening 62B of the second pipe body 62 is arranged in a state where a gap is formed between them, and the ejector is arranged at this portion. Get the effect.

Similarly, the front end portion of the third pipe body 63 is fitted externally in a state where a gap is formed between the second pipe body 62 and the second discharge opening 62A, whereby the ejector effect is obtained at this portion.

[Action and effect of the exhaust pipe in the embodiment]
By configuring the exhaust pipe EP in this way, it is possible to discharge the high-temperature exhaust gas discharged from the second exhaust gas purification device 48 as the exhaust gas treatment device to a high position and diffuse it. Further, of the exhaust pipe EP, the first pipe body 61 including the first bent portion C1, the second pipe body 62 including the second bent portion C2, and their relay points are accommodated in the exhaust pipe accommodating space S. At the same time, these are covered with the exhaust pipe cover 65.

Therefore, since the exhaust pipe accommodating space S is at a position where the roof 34 of the cabin 5 overlaps, the inconvenience that mud in the field adheres to the exhaust pipe EP is eliminated, and rainwater and dust are eliminated in the high temperature portion of the exhaust pipe EP. , The inconvenience of contact with straw etc. is also suppressed.

Since the first pipe body 61 and the second pipe body 62 of the exhaust pipe EP are supported by the cabin 5, and the exhaust pipe cover 65 is supported by the cabin 5 (supporting the exhaust pipe EP with respect to the cabin 5). (Because the exhaust pipe cover 65 is supported by a structure different from the structure), the exhaust pipe cover 65 does not become hot. In particular, in this exhaust pipe EP, as described above, external air can be sucked into the inside of the exhaust pipe cover 65 due to the ejector effect, so that the temperature rise of the entire exhaust pipe EP can be suppressed and at the same time, the outside can be suppressed. It is also possible to discharge the exhaust gas diluted with the air from a high position.

Further, in the exhaust pipe EP, since the first bent portion C1 is formed in the first pipe body 61 and the second bent portion C2 is formed in the second pipe body 62, for example, the pipe material is bent at both ends of the unit. Since it is not necessary to handle a long pipe material as compared with the one forming the portion, the processing for forming each bent portion becomes easy. Further, even when the bending direction of the first bending portion C1 and the bending direction of the second bending portion C2 are determined, the bracket 67 can be set properly by adjusting the mounting position.

[Another Embodiment]
The present invention may be configured as follows in addition to the above-described embodiments (those having the same functions as those of the embodiments are designated by the same numbers and reference numerals as those of the embodiments).

(A) The exhaust pipe EP of the present invention can be provided in a tractor having a cabin 5, and can also be provided in a head-feeding combine.

(B) An exhaust pipe accommodating space S (concave groove portion) is formed on the left side wall 32 of the cabin 5 and the rear wall 33 so as to extend in the vertical direction, and the exhaust pipe EP is accommodated therein. In this configuration, it is also conceivable to mold the exhaust pipe cover 65 into a flat plate shape.

(C) The present invention does not exclude the exhaust pipe EP formed of a single pipe material, for example, a shape in which a single pipe material is bent and the upper end side extends rearward, or the upper end. You may use the shape which extends linearly upward.

The present invention can be used for agricultural work machines provided with a cabin that covers the driver's seat.

5 Cabin 10 Driver's seat 34 Roof 44 Diesel engine (engine)
47 First exhaust gas purification device (exhaust gas treatment device)
48 Second exhaust gas purification device (exhaust gas treatment device)
61 1st pipe 62 2nd pipe 65 Exhaust pipe cover (cover)
65a Notch S Exhaust pipe accommodation space (concave groove)
C1 1st bending part C2 2nd bending part EP Exhaust pipe

Claims (5)

A cabin in which a driver's seat is arranged, an engine arranged in a lower region of the cabin, an exhaust gas treatment device arranged in the lower region to reduce particulate matter contained in exhaust gas from the engine, and the exhaust gas. It is equipped with an exhaust pipe that sends the exhaust gas from the treatment device upward, and also has an exhaust pipe.
The exhaust pipe is supported by the cabin, and the cover covering the exhaust pipe is supported by the cabin by a structure different from that of the exhaust pipe.
An agricultural work machine in which a concave groove portion extending in the vertical direction is formed on the outer wall of the cabin, the exhaust pipe is arranged along the concave groove portion, and the cover is arranged at a position covering the exhaust pipe . The agricultural work machine according to claim 1, wherein the exhaust pipe is arranged in an area surrounded by the cabin and the cover in a plan view. The exhaust pipe is composed of a first pipe body for sending exhaust gas from the exhaust gas treatment device and a second pipe body arranged on the downstream side of the first pipe body, and the exhaust gas from the first pipe body is the second pipe. The agricultural work machine according to claim 1 or 2, wherein the relay point to be delivered to the body is covered with the cover. The exhaust pipe forms a first bent portion on the lower end side and a second bent portion on the upper end side, and the first bent portion, the second bent portion, the first bent portion, and the above. The agricultural work machine according to any one of claims 1 to 3, wherein an intermediate portion with the second bent portion is covered with the cover. A cabin with a driver's seat inside, an engine located below the cabin, an exhaust gas treatment device that treats exhaust gas from the engine, and an exhaust pipe that sends out exhaust gas from the exhaust gas treatment device upward. With
The exhaust pipe is supported by the cabin, and the cover covering the exhaust pipe is supported by the cabin by a structure different from that of the exhaust pipe.
The roof of the cabin is provided with an overlapping portion that projects outward so as to cover the upper part of the exhaust pipe and the cover, and the downstream portion of the exhaust pipe is pulled out to the outside of the cover. An agricultural work machine in which a notch is formed at the upper end of the cover.

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