Spraying device for antifreeze or Anti-slip agent and spray vehicle, and method for discharging spray agent remaining in hopper of spray vehicle equipped with spraying disk

Abstract

To provide a spraying device 2 for an antifreeze or anti-slip agent that can prevent the spraying agent from solidifying in a hopper.SOLUTION: A spraying device includes a chute 31 including guide surfaces 33, 35 extending in the vertical direction that guide and drop antifreeze or anti-slip agent discharged from a discharge port 13 of a hopper 11 and descending, and a spraying disk 41 located below the chute 31 and rotatable about a rotation axis 42 extending in the vertical direction. The chute 31 includes all or part of the guide surfaces 33, 35 and has a movable part 32 that is movable between a first position P1 and a second position P2. The first position P1 is a position where the spaces S1, S2 defined by the guide surfaces 33, 35 of the chute 31 are continuous from an upper end to a lower end, and the second position P2 is a position where the space S2 defined by the guide surface 33 of the movable part 32 is located outside the space S2 of the movable part 32 located at the first position P1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an antifreeze or anti-skid agent spraying device and spraying vehicle, and a method for discharging spraying agent remaining in a hopper of a spraying vehicle equipped with a spraying disk. [Background technology]

[0002] BACKGROUND ART Patent Document 1 shows a known antifreeze agent spreading vehicle for spreading road salt.

[0003] In this antifreeze spraying vehicle, the amount of granules to be sprayed falls from a holding tank for the granules via a chute to a spraying granule discharger, and the granules are sprayed horizontally by centrifugal force. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-107375 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the antifreeze spraying vehicle described in Patent Document 1, when the spray granules are stored in a holding tank, the spray granules solidify inside the holding tank, causing the spray granules to clog the holding tank the next time the vehicle is used, making it impossible to discharge the spray granules from the holding tank. Also, the antifreeze spraying vehicle described in Patent Document 1 has difficulty discharging the spray granules from the holding tank to the outside. [Means for solving the problem]

[0006] In order to solve the above problem, a spraying device for antifreeze or anti-slip agent according to one embodiment of the present disclosure comprises a hopper that contains antifreeze or anti-slip agent and has a discharge pipe including a discharge outlet that opens downward, a conveyor that transports the antifreeze or anti-slip agent contained in the hopper and deposits it into the discharge outlet, a chute that includes a guide surface extending in the vertical direction that guides and drops the antifreeze or anti-slip agent that is discharged from the discharge outlet and descends, and a spraying disk that is rotatable around an axis of rotation extending in the vertical direction and is located below the chute, wherein the chute has a movable part that includes all or part of the guide surface and is movable between a first position and a second position, the first position being a position where the space defined by the guide surface of the chute is continuous from the upper end to the lower end, and the second position being a position where the space defined by the guide surface of the movable part is located outside the space defined by the guide surface of the movable part located at the first position.

[0007] With this configuration, the chute can be retracted to the second position to expose the space defined by the guide surface of the movable part located at the first position, and the antifreeze or anti-skid agent that descends through the space can be discharged to the outside of the device, thereby preventing the agent from solidifying inside the hopper. [Effects of the Invention]

[0008] Certain aspects of the present disclosure have the advantage of being able to prevent the spray material from solidifying in the hopper. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view showing an example of the configuration of a spraying vehicle equipped with a spraying device according to a first embodiment. [Figure 2] 2 is a cross-sectional view showing an example of the configuration of the vicinity of the rear end of the spraying vehicle of FIG. 1, showing a state in which the upper chute is positioned at a first position. FIG. [Figure 3]1. FIG. 4 is a cross-sectional view showing an example of the configuration of the vicinity of the rear end of the spraying vehicle of FIG. 1, showing a state in which the upper chute is positioned at a second position and a discharge chute is installed. [Figure 4] 1. FIG. 4 is a perspective view showing an example of the configuration of the vicinity of the rear end of the spraying vehicle of FIG. 1, showing a state in which the upper chute is positioned in a second position and a discharge chute is installed. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described with reference to the drawings. Note that the present invention is not limited to the following embodiments. In addition, the same or corresponding elements will be denoted by the same reference numerals throughout the drawings, and redundant description will be omitted.

[0011] FIG. 1 is a side view showing an example of the configuration of a spraying vehicle 100 equipped with a spraying device 2 according to an embodiment.

[0012] As shown in FIG. 1, the sprayer vehicle 100 is a vehicle used to spray antifreeze or anti-skid agent on roads, and a sprayer device 2 is mounted on the vehicle body frame 5 of the vehicle. The sprayer vehicle 100 also includes a pair of left and right support frames 6 extending rearward from the vehicle body frame 5, and a vehicle intrusion prevention device 7 supported by the pair of support frames 6 and extending in the vehicle width direction. The vehicle intrusion prevention device 7 includes a tip-side installation portion 26, which is the portion where the tip portion 38 of the discharge chute 3 described below is installed. The antifreeze sprayed by the sprayer vehicle 100 is a granular antifreeze, such as sodium chloride. The anti-skid agent sprayed by the sprayer vehicle 100 is a granular anti-skid agent, such as sand. Hereinafter, the antifreeze and anti-skid agent will be collectively referred to as "sprayer." Note that, hereinafter, the forward direction of the sprayer vehicle 100 will be referred to as "forward," the backward direction will be referred to as "rear," the left side relative to the forward direction will be referred to as "left," and the right side relative to the forward direction will be referred to as "right."

[0013] Fig. 2 is a cross-sectional view showing an example of the configuration near the rear end of the spraying vehicle 100, and is a diagram showing a state in which an upper chute 32, described later, is positioned at a first position P1. Fig. 3 is a cross-sectional view showing an example of the configuration near the rear end of the spraying vehicle 100, and is a diagram showing a state in which an upper chute 32, described later, is positioned at a second position P2 and a discharge chute 3, described later, is installed. Fig. 4 is a perspective view showing an example of the configuration near the rear end of the spraying vehicle 100, and is a diagram showing a state in which an upper chute 32, described later, is positioned at a second position P2 and a discharge chute 3 is installed. Note that the spraying device 2 is not shown in Fig. 4.

[0014] As shown in Figure 2, the spraying device 2 is a device that sprays a spray agent by centrifugal force applied to the spray agent by a rotating spraying disk 41. The spraying device 2 includes a hopper 11 (see Figure 1), a conveyor 15, a chute 31, the spraying disk 41, a spraying disk drive unit 48, a support mechanism 51, and a lower chute support unit 71.

[0015] As shown in Fig. 1, the hopper 11 is a box-shaped container that contains an antifreeze or anti-skid agent. The hopper 11 includes a discharge pipe 12 that protrudes rearward. As shown in Fig. 2, the discharge pipe 12 includes a discharge port 13 that opens downward.

[0016] The conveyor 15 is a transport mechanism that transports the antifreeze or anti-slip agent stored in the hopper 11 horizontally and deposits it into the discharge port 13. In this embodiment, the conveyor 15 is a screw conveyor, but is not limited to this and may be a belt conveyor.

[0017] The chute 31 is a tubular body that guides the spray agent. The chute 31 is connected to the discharge pipe 12 so that its upper end faces the discharge port 13, extends downward from the upper end, and is open at its lower end. The antifreeze agent dispensed into the discharge port 13 descends through the internal space of the chute 31 and is discharged from the opening at its lower end. The chute 31 is supported by a support mechanism 51 (described later) so that it can move in whole or in part between a first position P1 shown in FIG. 1 and a second position P2 shown in FIG. 2. In this embodiment, the chute 31 is divided into two vertically, an upper chute 32 and a lower chute 34. The upper chute 32 is a movable part that can move between the first position P1 and the second position P2. The inner surfaces of the upper chute 32 and the lower chute 34 that extend vertically form guide surfaces 21 and 22 that guide and drop the antifreeze agent or anti-slip agent dispensed from the discharge port 13 and descending. The first position P1 is a position where the space S1 defined by the guide surface 21 of the upper chute 32 and the space S2 defined by the guide surface 22 of the lower chute 34 are continuous, and the space defined by the guide surfaces 21, 22 of the chute 31 is continuous from the upper end to the lower end. The second position P2 is a position where the space S1 defined by the guide surface 21 of the upper chute 32 is located outside the space S1 of the upper chute 32 located at the first position P1. In this embodiment, the second position P2 is located forward of the first position P1 in the vehicle length direction of the spraying vehicle 100.

[0018] The spraying plate 41 is located below the discharge port 13. The spraying plate 41 is formed in a disk shape extending on a horizontal plane and is rotatable around a rotation axis 42 extending in the vertical direction. The spraying plate drive unit 48 is an actuator having a drive shaft that rotates the rotation axis 42 of the spraying plate 41. The drive shaft of the spraying plate drive unit 48 is connected to the rotation axis 42 and supports the spraying plate 41 in a suspended state. The spraying plate drive unit 48 is fixed to the lower chute 34, and the spraying plate 41 is fixed to the lower chute 34 via the spraying plate drive unit 48. When spraying a spray agent using the spraying vehicle 100, an operator drives the spraying vehicle 100 and feeds the spray agent into the discharge port 13 using the conveyor 15. The spray agent fed into the discharge port 13 is guided down by the chute 31 and falls onto the upper front surface of the rotating spraying plate 41. The spray agent that has fallen onto the upper surface of the spraying disc 41 then rotates in a circumferential direction around the rotation axis 42 of the spraying disc 41. As a result, a centrifugal force acting outward from the rotation axis 42 acts on the spray agent, causing the spray agent to move radially outward from the spraying disc 41 and rotate approximately half a turn to be sprayed behind the spraying vehicle 100.

[0019] The support mechanism 51 is a mechanism that supports the upper chute 32, which is a movable part of the chute 31, so that the upper chute 32 can move between a first position P1 shown in Fig. 2 and a second position P2 shown in Fig. 3. In this embodiment, the support mechanism 51 supports the upper chute 32 so that the upper chute 32 can move in the front-rear direction.

[0020] 4, the support mechanism 51 includes a pair of left and right guide rails 52, a slider 53, and a fastener 54. The guide rails 52 are plate-shaped bodies fixed to the discharge pipe 12 and extending in a direction from the first position P1 to the second position P2, i.e., in the front-to-rear direction. Two circular holes are formed in each guide rail 52 and aligned in the direction from the first position P1 to the second position P2, and a set screw 67, which will be described later, is inserted into each of these two circular holes.

[0021] The slider 53 supports the upper chute 32 of the chute 31 and moves along the guide rails 52. The slider 53 has a pair of elongated holes 61. Each elongated hole 61 is located below the corresponding guide rail 52, facing a circular hole formed in the guide rail 52, and extends in the direction from the first position P1 to the second position P2, i.e., the front-to-rear direction. The slider 53 supports the upper chute 32 in the front portion between the pair of elongated holes 61. In addition, a notch 62 cut from the rear end to the front end is formed in the rear portion of the slider 53 between the pair of elongated holes 61, allowing the spray agent discharged from the discharge port 13 to pass through.

[0022] The pair of guide rails 52 and slider 53 are connected by a fastener 54. The fastener 54 is an external screw with a knob, and includes a total of four set screws 67, two on each side, and a pair of left and right pressure plates 68 each having an internal thread that screws into the external threads of the set screws 67. The set screws 67 are inserted through the circular holes in the guide rail 52 and the elongated holes 61 in the slider 53. The pressure plate 68 is located below the slider 53, and the internal threads of the press plate 68 are threaded into the tips of the set screws 67.

[0023] As a result, the slider 53 can be moved forward and backward relative to the guide rail 52 with little operating force between a first position P1 shown in FIG. 2, where the front set screw 67 is located at the front end of the elongated hole 61, and a second position P2 shown in FIG. 3, where the rear set screw 67 is located at the rear end of the elongated hole 61. When the slider 53 is located at the first position P1 shown in FIG. 2, the upper end opening of the upper chute 32 supported by the slider 53 faces the discharge port 13, and the lower end opening of the upper chute 32 faces the upper end opening of the lower chute 34, making the spaces S1 and S2 continuous. As a result, the spray agent discharged from the discharge port 13 descends through the space within the chute 31. Furthermore, when the slider 53 is located at the second position P2 shown in FIG. 3, the notch 62 of the slider 53 is located below the discharge port 13, freeing up the space S1 defined by the guide surface 21 of the upper chute 32 located at the first position P1.

[0024] Moreover, by tightening the fastener 54, the slider 53 can be fixed to the guide rail 52. That is, by tightening the fastener 54, the guide rail 52 and the slider 53 can be sandwiched between the knob of the set screw 67 of the fastener 54 and the pressure plate 68, and pressed and fixed. Moreover, by loosening the fastener 54, the slider 53 can be released from being fixed to the guide rail 52.

[0025] The lower chute support portion 71 is a frame that supports the lower chute 34. The lower chute support portion 71 has a pair of beams 73 and a support plate 74. The beams 73 are, for example, angle bars and are suspended across the pair of support frames 6. The support plate 74 is a plate-like body suspended across the pair of beams 73. A circular hole is formed in the center of the support plate 74, and the lower chute 34 is inserted and fixed through the circular hole. The lower chute 34 is fixed to the support plate 74 with its upper end 35 protruding above the upper surface of the support plate 74. In other words, the upper end 35 of the lower chute 34 and the lower end 33 of the upper chute 32, which faces the upper end 35, are located above the support frame 6 in the vehicle height direction. This facilitates the operation of moving the upper chute 32. The lower chute support portion 71 includes a base-end installation portion 27, which is a portion where the base end 37 of the discharge chute 3, described below, is installed. The base end installation portion 27 is located above the tip end installation portion 26 of the vehicle intrusion prevention device 7.

[0026] When discharging the remaining scattering material from the hopper 11 after the scattering operation, the scattering material is discharged using the discharge chute 3, as shown in Figure 3. The discharge chute 3 includes a bottom portion 39 extending in the longitudinal direction and a pair of side portions 40 (see Figure 4) extending upward from both ends of the bottom portion 39. The discharge chute 3 is installed so as to span between the support plate 74 of the lower chute support portion 71 and the vehicle intrusion prevention device 7. Support legs 36 are attached to the bottom surface of the base end portion 37 side and the bottom surface of the tip end portion 38 side of the discharge chute 3, respectively. This allows the discharge chute 3 to be stably installed on the support plate 74 and the vehicle intrusion prevention device 7.

[0027] Next, the operation of discharging the spray agent remaining in the hopper 11 of the spray vehicle 100 will be described.

[0028] First, when discharging the remaining spray material in the hopper 11 of the sprayer vehicle 100 after spraying work is completed, the operator stands behind the sprayer vehicle 100 and loosens each set screw 67, as shown in Figure 2. This releases the slider 53 and the upper chute 32 supported by the slider 53. Next, the operator pushes the slider 53 forward. This retracts the upper chute 32 from the first position P1 to the second position P2, as shown in Figure 3, and exposes the space S1 defined by the guide surface 21 of the upper chute 32 located at the first position P1.

[0029] Next, the worker inserts the base end 37 of the discharge chute 3 into the exposed space S1, installs the base end support leg 36 of the discharge chute 3 on the base end installation portion 27 of the lower chute support portion 71, and installs the discharge chute 3 so that it passes through the space S1 and above the vehicle intrusion prevention device 7. Then, the worker installs the tip end support leg 36 of the discharge chute 3 on the tip end installation portion 26 of the vehicle intrusion prevention device 7. As a result, the discharge chute 3 is suspended between the lower chute support portion 71 and the vehicle intrusion prevention device 7, and the discharge chute 3 assumes a position extending obliquely downward from the base end 37 to the tip end 38, with the base end 37 located below the discharge port 13 and the tip end 38 located lower than the base end 37 behind the vehicle intrusion prevention device 7 of the sprayer 100. Then, the worker installs a storage container such as a flexible container bag on the ground below the tip end 38 of the discharge chute 3.

[0030] Next, the operator drives the conveyor 15, which transports the spray agent contained in the hopper 11 horizontally and deposits it into the discharge port 13. This causes the spray agent to be discharged from the discharge port 13 and fall onto the discharge chute 3. The spray agent that falls onto the discharge chute 3 slides down the discharge chute 3 toward the tip 38 and is deposited into a storage container. In this way, the spray agent discharged from the discharge port 13 is guided and discharged by the discharge chute 3 into the space behind the vehicle intrusion prevention device 7. This allows the spray agent remaining in the hopper 11 to be discharged outside the device, preventing the spray agent from solidifying within the hopper 11. In addition, the discharge chute 3 can be used to discharge the spray agent into the open space behind the vehicle intrusion prevention device 7, avoiding the vehicle intrusion prevention device 7, and the spray agent can be refilled into a spray agent storage container installed in this open space. This makes it easy to transfer the spray agent to the storage container. Furthermore, the upper end 35 of the lower chute 34 and the lower end 33 of the upper chute 32 opposite this upper end 35 are located above the support frame 6 in the vehicle height direction, so the discharge chute 3 can be installed at an appropriate height position.

[0031] Then, when the discharge work is completed, the worker removes the discharge chute 3 from the sprayer vehicle 100 and pulls out the slider 53 rearward. This positions the upper chute 32 at the first position P1, and the space S1 defined by the guide surface 21 of the upper chute 32 can be shielded by the upper chute 32.

[0032] Next, the worker tightens each set screw 67. This fixes the slider 53 and the upper chute 32 supported by the slider 53 to the guide rail 52. At this time, the slider 53 is sandwiched between the guide rail 52 and the pressure plate 68, which reduces rattles between the slider 53 and the upper chute 32 when fixed. Therefore, noise caused by rattles while the spraying vehicle 100 is traveling can be reduced.

[0033] As described above, the upper chute 32 of the spraying device 2 is movable between the first position P1 and the second position P2, so the upper chute 32 can be retracted to the second position P2 to expose the space S1 defined by the guide surface 21 of the upper chute 32, and the spraying agent descending through the space S1 can be discharged outside the spraying device 2. This prevents the spraying agent from solidifying in the hopper 11.

[0034] <Modification> In the above embodiment, the upper chute 32 of the chute 31 is movable, but this is not limiting. Instead, the entire chute 31 may be movable.

[0035] In the above embodiment, the second position P2 is located in front of the first position P1, but this is not limiting. Instead, the second position P2 may be located, for example, to the side of the first position P1.

[0036] Furthermore, in the above embodiment, the upper chute 32 is slid between the first position P1 and the second position P2, but this is not limiting. Instead, the upper chute 32 may be swung about a rotation axis extending in the vertical direction between the first position P1 and the second position P2.

[0037] From the above description, many modifications and other embodiments of the present invention will be apparent to those skilled in the art. Therefore, the above description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode for carrying out the present invention. Details of the structure and / or function thereof may be substantially changed without departing from the spirit of the present invention.

[0038] (List of embodiments)

[0039] (Form 1) a hopper containing an antifreeze or anti-slip agent and having a discharge pipe including a discharge port opening downward; a conveyor that transports the antifreeze agent or the anti-slip agent contained in the hopper and pours it into the discharge port; a chute including a guide surface extending in a vertical direction that guides and drops the antifreeze agent or the anti-slip agent that is discharged from the discharge port and descends; A spraying plate that is rotatable around a rotation axis extending in the vertical direction and is located below the chute, The chute has a movable part that includes all or part of the guide surface and is movable between a first position and a second position, the first position being a position where the space defined by the guide surface of the chute is continuous from the upper end to the lower end, and the second position being a position where the space defined by the guide surface of the movable part is located outside the space defined by the guide surface of the movable part located at the first position.

[0040] According to this configuration, the movable part can be retracted to the second position to expose the space defined by the guide surface of the movable part located at the first position, and the antifreeze or anti-skid agent that descends through the space can be discharged to the outside of the device, thereby preventing the agent from solidifying inside the hopper.

[0041] (Form 2) An antifreeze or anti-slip agent spraying device as described in claim 1, comprising a support mechanism that supports the movable part of the chute so that it can move between the first position and the second position.

[0042] According to this configuration, the movable part can be easily moved to the second position.

[0043] (Form 3) The support mechanism includes a guide rail fixed to the discharge pipe and extending in a direction from the first position toward the second position, and a slider that supports the movable part and moves along the guide rail.

[0044] According to this configuration, the movable part can be easily moved to the second position.

[0045] (Form 4) The antifreeze or anti-slip agent spraying device according to claim 3, wherein the support mechanism has a fastener that fixes the slider to the guide rail.

[0046] This configuration allows the movable part to be fixed, and also prevents rattles when the movable part is fixed.

[0047] (Form 5) The chute includes an upper chute and a lower chute that are the movable part, An antifreeze or anti-slip agent spraying device as described in claim 2, wherein the upper chute is supported on the support mechanism so as to be movable between the first position and the second position.

[0048] With this configuration, the upper chute can be moved with a small operating force.

[0049] (Form 6) A spraying device according to aspect 5; a vehicle body having a vehicle body frame on which the spraying device is mounted, a support frame extending rearward from the vehicle body frame, and a vehicle intrusion prevention device supported by the support frame and extending in the vehicle width direction; The lower chute is supported by the support frame, An antifreeze or anti-slip agent spraying vehicle, wherein the lower end of the upper chute and the upper end of the lower chute are positioned above the support frame in the vehicle height direction.

[0050] With this configuration, the discharge chute can be installed at an appropriate height.

[0051] (Form 7) The spraying device further includes a lower chute support portion supported by the support frame and supporting the lower chute, the lower chute support portion has a base end installation portion on which a base end of a discharge chute is installed, the discharge chute guiding the antifreeze or anti-skid agent discharged from the discharge port from a space defined by the guide surface of the upper chute positioned at the first position to a space behind the vehicle intrusion prevention device when the upper chute is positioned at the second position; A vehicle for spraying an antifreeze or anti-skid agent according to aspect 6.

[0052] According to this configuration, the spray agent can be discharged into the open space behind the vehicle intrusion prevention device using the discharge chute, and then the spray agent can be stored in a storage container installed in the open space behind the vehicle intrusion prevention device, which makes it easy to transfer the spray agent into the storage container.

[0053] (Form 8) The vehicle intrusion prevention device has a tip-side installation portion on which the tip of the discharge chute is installed.

[0054] This configuration allows the installed discharge chute to be stabilized.

[0055] (Form 9) A method for discharging a spraying agent remaining in a hopper of a spraying vehicle that sprays an antifreeze or anti-slip agent by centrifugal force applied to the spraying agent by a rotating spraying disk, comprising: The movable part of the chute includes a movable part that includes all or part of a guide surface extending in the vertical direction that guides and drops the spray agent discharged from the discharge outlet of the discharge pipe of the hopper, and the movable part is moved from a first position where the space defined by the guide surface of the chute is continuous from the upper end to the lower end to a second position where the space defined by the guide surface of the movable part is located outside the space defined by the guide surface of the movable part located at the first position, a discharge chute is installed so as to pass through a space defined by the guide surface of the movable part located at the first position and above the vehicle intrusion prevention device of the spraying vehicle; The spray agent remaining in the hopper is transported by a conveyor and poured into the discharge outlet; A method for discharging spray agent, in which the spray agent discharged from the discharge port is guided by the discharge chute from the first position to a space behind the vehicle intrusion prevention device and discharged.

[0056] According to this configuration, the chute can be retracted to the second position to expose the space defined by the guide surface of the movable part positioned at the first position, and the spray agent, which is an antifreeze or anti-slip agent, can be guided from the space toward the space behind the vehicle intrusion prevention device and discharged into the open space behind the vehicle intrusion prevention device. This prevents the spray agent from solidifying in the hopper. The spray agent can then be filled into a storage container installed in the open space behind the vehicle intrusion prevention device. This makes it easy to transfer the spray agent to the storage container. [Explanation of symbols]

[0057] 1. Body 2 Spraying device 3 Ejection chute 5 Body frame 6 Support Frame 7 Vehicle intrusion prevention device 11 Hopper 12 Discharge pipe 13 Outlet 15 Conveyor 21 Upper chute guide surface 22 Lower chute guide surface 31 Shooter 32 Upper Shooter 34 Lower Shooter 41 Spreader 42 Rotation axis 51 Support mechanism 100 Sprayer

Claims

1. a hopper containing an antifreeze or anti-slip agent and having a discharge pipe including a discharge port opening downward; a conveyor that transports the antifreeze agent or the anti-slip agent contained in the hopper and pours it into the discharge port; a chute including a guide surface extending in a vertical direction that guides and drops the antifreeze agent or the anti-slip agent that is discharged from the discharge port and descends; A spraying plate that is rotatable around a rotation axis extending in the vertical direction and is located below the chute, The chute has a movable part that includes all or part of the guide surface and is movable between a first position and a second position, the first position being a position where the space defined by the guide surface of the chute is continuous from the upper end to the lower end, and the second position being a position where the space defined by the guide surface of the movable part is located outside the space defined by the guide surface of the movable part located at the first position.

2. The device for spraying an antifreeze or anti-slip agent according to claim 1 , further comprising a support mechanism that supports the movable portion of the chute so that the movable portion can move between the first position and the second position.

3. 3. The antifreeze or anti-slip agent spraying device of claim 2, wherein the support mechanism includes a guide rail fixed to the discharge pipe and extending in a direction from the first position toward the second position, and a slider that supports the movable part and moves along the guide rail.

4. The antifreeze or anti-skid agent spraying device according to claim 3 , wherein the support mechanism includes a fastener that secures the slider to the guide rail.

5. The chute includes an upper chute and a lower chute that are the movable part, 3. The device for spraying antifreeze or anti-skid agent according to claim 2, wherein the upper chute is supported by the support mechanism so as to be movable between the first position and the second position.

6. The spraying device according to claim 5; a vehicle body having a vehicle body frame on which the spraying device is mounted, a support frame extending rearward from the vehicle body frame, and a vehicle intrusion prevention device supported by the support frame and extending in the vehicle width direction; The lower chute is supported by the support frame, An antifreeze or anti-slip agent spraying vehicle, wherein the lower end of the upper chute and the upper end of the lower chute are positioned above the support frame in the vehicle height direction.

7. The spraying device further includes a lower chute support portion supported by the support frame and supporting the lower chute, the lower chute support portion has a base end installation portion on which a base end of a discharge chute is installed, the discharge chute guiding the antifreeze or anti-skid agent discharged from the discharge port from a space defined by the guide surface of the upper chute positioned at the first position to a space behind the vehicle intrusion prevention device when the upper chute is positioned at the second position; A vehicle for spreading antifreeze or anti-skid agent according to claim 6.

8. 8. The vehicle for spraying antifreeze or anti-skid agent according to claim 7, wherein the vehicle intrusion prevention device has a tip-side installation portion on which the tip of the discharge chute is installed.

9. A method for discharging a spraying agent remaining in a hopper of a spraying vehicle that sprays an antifreeze or anti-slip agent by centrifugal force applied to the spraying agent by a rotating spraying disk, comprising: The movable part of the chute includes a movable part that includes all or part of a guide surface extending in the vertical direction that guides and drops the spray agent discharged from the discharge outlet of the discharge pipe of the hopper, and the movable part is moved from a first position where the space defined by the guide surface of the chute is continuous from the upper end to the lower end to a second position where the space defined by the guide surface of the movable part is located outside the space defined by the guide surface of the movable part located at the first position, a discharge chute is installed so as to pass through a space defined by the guide surface of the movable part positioned at the first position and above the vehicle intrusion prevention device of the spraying vehicle; The spray agent remaining in the hopper is transported by a conveyor and poured into the discharge outlet; A method for discharging spray agent, in which the spray agent discharged from the discharge port is guided by the discharge chute from the first position to a space behind the vehicle intrusion prevention device and discharged.

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