Harvesting machine

Abstract

To provide a harvester having a mechanism for minimizing an impact of a problem during manual handling of grain culm by quickly blocking a transmission.SOLUTION: The present invention includes an operator's seat, a drive device, a harvesting device, and a threshing device. The threshing device is provided with a feed chain drive mechanism for conveying grain culm. The front side of the feed chain drive mechanism is provided with a convey operation lever for setting the manually harvested grain culm and conveying to the feed chain drive mechanism. A transmission member 35 is provided for transmitting drive force to the feed chain drive mechanism. A transmission switching member 201 is provided for switching the transmission member 35 between a transmission state and a non-transmission state. An intension mechanism 200 is provided for moving the transmission switching member 201 to the transmission position. The feed chain drive mechanism operates by the operation of the convey operation lever only when the intension mechanism 200 is operated.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a harvesting machine that is equipped with a threshing section transport device that supplies grain stalks harvested by a harvesting device to a threshing device, and is configured to transport grain stalks harvested manually to the threshing device. [Background technology]

[0002] Conventionally, there has been a combine harvester equipped with a manual threshing transport mechanism in which manually harvested stalks are manually set at the transport start end of the feed chain to supply the stalks to a threshing device, and by operating the manual threshing lever, a transmission clutch to the threshing device is connected, allowing the stalks to be transported (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-71357 Summary of the Invention [Problem to be solved by the invention]

[0004] When transporting stalks using a manual transport mechanism, the transport speed is slower than during normal harvesting, but the worker must work close to the rotating feed chain, and there is a high possibility that the hands and arms of the worker who is feeding the stalks will come into contact with the stalks. An emergency stop switch is provided near the start of the feed chain's transport to cut off the transmission of the driving force, but it does not stop until it is operated, so there is a risk that the stalks may be held for a long time.

[0005] Furthermore, even if care is taken to prevent hands and arms from getting pinched, if the worker gets too close to the feed chain, the cuffs of their clothing, work gloves, towels, etc. may get pinched, and the worker's body may be pulled in the direction of conveyance.

[0006] In order to address the above-mentioned problems, the present invention provides a harvesting machine equipped with a mechanism that quickly cuts off the transmission to minimize the impact if a problem occurs during the manual threshing of stalks. [Means for solving the problem]

[0007] First invention related to the present invention is a harvesting machine comprising an operating seat (21), a traveling device (4), a harvesting device (5), and a threshing device (10), a feed chain drive mechanism (9) for transporting stalks to the threshing device (10), and a transport operation lever (110) in front of the feed chain drive mechanism (9) for setting manually harvested stalks and transporting them to the feed chain drive mechanism (9); a transmission member (35) for transmitting a driving force to the feed chain drive mechanism (9), a transmission switching member (201) for switching the transmission member (35) between a transmission state and a non-transmission state, and an intention mechanism (200) for moving the transmission switching member (201) to the transmission position, and the feed chain drive mechanism (9) operates by operating the transport operation lever (110) only when the intention mechanism (200) is being operated.

[0008] Claim 1 The described invention is A harvesting machine is provided with an operating seat (21), a traveling device (4), a reaping device (5), and a threshing device (10), and the threshing device (10) is provided with a feed chain drive mechanism (9) for transporting stalks, and a transport operation lever (110) is provided in front of the feed chain drive mechanism (9) for setting manually harvested stalks and transporting them to the feed chain drive mechanism (9); a transmission member (35) for transmitting a driving force to the feed chain drive mechanism (9) is provided, a transmission switching member (201) is provided for switching the transmission member (35) between a transmission state and a non-transmission state is provided, and an intention mechanism (200) is provided for moving the transmission switching member (201) to a transmission position, and the feed chain drive mechanism (9) operates by operating the transport operation lever (110) only when the intention mechanism (200) is being operated; The intention mechanism (200) is composed of an operating member (205) that operates to move the transmission switching member (201) to the transmission position, a connecting wire (204) that connects the operating member (205) and the transmission switching member (201), and a biasing member (202) that biases the transmission switching member (201) to the non-transmission position, and is characterized in that when the operating member (205) is operated, the connecting wire (204) moves the transmission switching member (201) to the transmission position, and when the operating member (205) is not operated, the biasing member (202) moves the transmission switching member (201) to the non-transmission position.

[0009] Claim 2The described invention is a harvesting machine as described in claim 2, characterized in that the intention mechanism (200) is attached to a plate (205a) together with an operation lock member (207), the plate (205) is configured to be detachable from a cover (10a) provided on the outside of the body of the threshing device (10), and the connecting wire (204) is configured to be detachable from the operating member (205), and the removed connecting wire (204) is configured to be connectable to the operation lock member (207).

[0010] Claim 3 The invention described above has a mechanism for receiving and pushing back the stalks adjacent to the reaping position outside the body of the threshing device (10) and below the feed chain drive mechanism (9). Grain culm guide body The intention mechanism (200) is provided with a position determining member (210) for determining whether the stalk guide body (208) is on the moving away side or the moving towards side of the threshing device (10), a seating determining member (21a) for determining whether an operator is seated in the operating seat (21), a traveling determining member (211) for determining whether the traveling device (4) is in a traveling state or a stopped state, and the transmission switching member (2 The harvesting machine according to claim 1 is characterized in that it is composed of a switching actuator (203) that moves the transmission switching member (201) between a transmission position and a non-transmission position, and when a position determination member (210) determines that the straw guide body (208) is on the separated side, a seating determination member (21a) determines that there is no operator in the operating seat (21), and a travel determination member (211) determines that the vehicle is stopped, the switching actuator (203) is activated to move the transmission switching member (201) to the transmission position.

[0011] Claim 4The invention described in the claims is characterized in that a partition member (214) for switching the entrance / exit port of the operating seat (21) between an open state and a blocked state is provided so as to be rotatable, a receiving member (215) for receiving the partition member (214) in the blocked state is provided, a partition determination member (216) for determining whether the partition member (214) is in the open state or the blocked state is provided, and a switching actuator (203) for moving the transmission switching member (201) between a transmission position and a non-transmission position is provided, and when the partition determination member (216) determines the open state, the switching actuator (203) moves the transmission switching member (201) to the non-transmission position. 3 The harvesting machine is described in any one of the above items.

[0012] Claim 5 The invention described in the specification is characterized in that the travel device (4) is provided with a continuously variable transmission (39) for transmitting a driving force, and a travel detection member (211) for calculating the travel speed by the travel device (4) and determining whether the vehicle is in a travelling state or a stopped state, and when the partition determination member (216) determines the open state and then the partition member (214) is brought into contact with the receiving member (215) to determine the closed state, the switching actuator (203) is not operated until the determination of the travel detection member (211) is switched from the stopped state to the travelling state. 4 2. A harvesting machine according to claim 1. [Effects of the Invention]

[0013] The first related to the present invention The effect of the invention is that if the intention mechanism (200) is not operated, the transmission to the feed chain drive mechanism (9), which is driven by operating the conveying operation lever (110), is cut off, so that the feed chain drive mechanism (9), which is driven in an emergency, can be stopped immediately, improving the safety of the working environment.

[0014] Claim 1 The effects of the invention described in The first related to the present invention In addition to the effects of the invention, when the operating member (205) is no longer operated, the biasing member (202) moves the transmission switching member (201) to the non-transmission position, thereby ensuring that the driving force is cut off and improving safety.

[0015] Claim 2 The effect of the invention described in claim 1 In addition to the effects of the invention described above, by detaching the connecting wire (204) from the operating member (205), it is possible to prevent the transmission switching member (201) from moving to the transmission side when the intention mechanism (200) is attached to the cover (10a) and stored. This prevents the feed chain drive mechanism (9) from operating unintentionally, ensuring safety.

[0016] Claim 3 The effect of the invention described in claim 1 is as follows in addition to the effect of the invention described in claim 1: Grain culm guide body Since the transmission switching member (201) does not move to the transmission position unless the (208) is moved away from the threshing device (10), it is possible to prevent the worker from getting too close to the feed chain drive mechanism (9). This makes it less likely that the worker's clothing will be caught in the feed chain drive mechanism (9) when manually setting the straw, improving work safety.

[0017] In addition, the culms growing adjacent to the harvesting rows Grain culm guide body (208) and the outside of the machine body can be prevented, so that damage to the stalks, which leads to a decrease in the yield and a decrease in the commercial value, can be prevented.

[0018] Claim 4 The effects of the invention described in claim 1 are as follows: 3 In addition to the effects of the invention described in any one of the above, by providing a partition member (214) at the entrance to the operating seat (21) and making it possible to switch between an open state and a blocked state, it is possible to prevent the legs of an operator from protruding outside the machine through the entrance when the operator stands up from the operating seat (21).

[0019] Furthermore, when the partition member (214) is opened, it is determined that the operator is getting off the machine and the transmission switching member (201) is moved to the non-transmission position, cutting off the transmission of driving force to the reaping device (5) and the threshing device (10). Therefore, even if the operator gets too close to the reaping device (5) or the threshing device (10), the components are not driven, ensuring safety.

[0020] Claim 5 The effect of the invention described in claim 4 In addition to the effects of the invention described above, even if the partition member (214) is opened and then switched to the blocked state after the worker dismounts, the transmission switching member (201) is not moved from the non-transmission position while the travel detection member (211) detects the stopped state, so safety is ensured.

[0021] Furthermore, the partition member (214) in the closed state can be used as a handrail when getting on and off, thereby improving safety when getting on and off the operator's seat (22). [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a side view showing a combine harvester according to the present invention. [Figure 2] Plan view showing a combine harvester [Figure 3] A side view showing the front of the feed chain drive mechanism [Figure 4] A side view showing the drive section of the drive sprocket [Figure 5] Rear cross-sectional view showing the drive section of the drive sprocket [Figure 6] FIG. 10 is a perspective view showing a fastener for a radiator cover; [Figure 7] A side view showing the drive unit of the drive sprocket equipped with the intention mechanism and the intention operation pedal. [Figure 8] (a) A plan view of the main part showing the state in which the connecting wire is connected to the intention operation pedal, and (b) A plan view of the main part showing the state in which the connecting wire is connected to the pedal lock. [Figure 9] FIG. 1 is a side view of a combine harvester with the intention control pedal in the stored position; [Figure 10] Side view of the main part of a combine harvester equipped with a long-culm narrow guide [Figure 11] A plan view of the main part of a combine harvester equipped with a rotatable long-culm narrow guide. [Figure 12]Plan view of the main part of the combine harvester equipped with a sliding long-culm narrow guide [Figure 13] A side view of the main part showing a mechanism that has a boarding / alighting partition bar at the boarding / alighting entrance to cut off the drive when passengers get off the vehicle. DETAILED DESCRIPTION OF THE INVENTION

[0023] A combine harvester as one embodiment of the harvesting machine of the present invention will be described in detail below with reference to the drawings.

[0024] For ease of understanding, the description will be made for convenience, referring to the front as the front side, the rear as the rear side, the right hand side as the right side, and the left hand side as the left side, as seen from the operator's perspective, but the present invention is not limited to these.

[0025] As shown in Figures 1 and 2, the combine harvester 1 comprises a body frame 2, an engine 3 as a driving power source, a traveling device 4, a harvesting device 5, a threshing device 10 equipped with a feed chain drive mechanism 9, and a grain tank 8.

[0026] The machine frame 2 forms a frame-shaped structural member of the body of the combine harvester 1.

[0027] The engine 3 is provided on the aircraft frame 2 at the front side in the longitudinal direction, below a control section 22 in which an operator's seat 21 is provided.

[0028] The traveling device 4 is provided vertically below the machine body frame 2. The traveling device 4 moves the entire combine harvester 1 using driving force from the engine 3. The traveling device 4 has crawlers 41. A pair of crawlers 41 are provided on the left and right, spaced apart in the vehicle width direction, vertically below the machine body frame 2. The traveling device 4 moves the entire combine harvester 1 forward in the fore-and-aft direction by driving the crawlers 41 using driving force transmitted from the engine 3.

[0029] The harvesting device 5 is provided at the front of the machine frame 2 and is equipped with a dividing body 51 that divides the culms growing in the field, a lifting device 52 that raises the culms, a cutting blade 53 that cuts the lower part of the culms, a transport device 56 that transports the harvested culms, and a suspension base 59. It is driven by the driving force from the engine 3 to harvest the culms and transport the harvested culms to the threshing device 10.

[0030] The conveying device 56 is equipped with a stalk base conveying device 56a and a tip conveying device 56b, and conveys the stalks from the reaping device 5 to the threshing device 10, and then hands them over to the feed chain drive mechanism 9.

[0031] The suspension base 59 is provided at the rear end of the reaping device 5 and in front of the threshing device 10. The suspension base 59 includes a pair of left and right standing frames 59a on the left and right sides in the vehicle width direction that stand upright from the machine frame 2, and a connecting frame that connects the left and right standing frames 59a to each other.

[0032] The threshing device 10 is provided behind the reaping device 5 and to the side of the grain tank 8 (on the left side of the machine frame 2), and has an upper threshing section and a lower sorting section.

[0033] The threshing section and sorting section are provided above the machine frame 2 and behind the conveying device 56 of the reaping device 5.

[0034] The threshing unit threshes the stalks transported by the driving force from the engine 3. In other words, the threshing unit is a device that separates grains from the stalks that have been harvested by the harvesting device 5.

[0035] The left outer side of the threshing device 10 is covered by front and rear belt covers 11, 12, a chain cover 13, and a cutter cover 14.

[0036] The sorting unit is a device that separates impurities such as straw from the culms threshed by the threshing unit from the grains using driving force from the engine 3.

[0037] The grain tank 8 is provided on the side of the threshing device 10 and stores the grains collected by the sorting section of the threshing device 10.

[0038] A discharge auger 81 is connected to the grain tank 8. The discharge auger 81 is used to transport grains in the grain tank 8 by the driving force from the engine 3 and discharge the grains to the outside of the grain tank 8.

[0039] The feed chain drive mechanism 9 rotates and drives the feed chain 96 to take over the stalks harvested by the harvesting device 5 and transport them by the transporting device 56 of the harvesting device 5 to the threshing section of the threshing device 10.

[0040] The feed chain drive mechanism 9 is arranged on the side opposite to the side where the grain tank 8 of the threshing device 10 is arranged, i.e., on the left side.

[0041] Here, the detailed configuration of the feed chain drive mechanism 9 will be described with reference to FIGS.

[0042] The feed chain drive mechanism 9 comprises a feed chain 96, a chain rail main frame 91, a lower central chain rail 92a and a lower front chain rail 92b, and an upper chain rail 93, which guide and support the feed chain 96, a drive sprocket 94, a plurality of driven sprockets 95, a tension roller 90, a clamping rod 18, etc.

[0043] The lower front chain rail 92b is integrally formed with the lower front end of the upper chain rail 93.

[0044] The upper chain rail 93 is the working side rail that guides the feed chain 96 that transports the grain straw, and the lower central chain rail 92a and the lower front chain rail 92b are non-working side rails.The feed chain 96 is guided by the upper surface of the upper chain rail 93 and moves backward to transport the grain straw, and then is guided by the upper surface of the lower central chain rail 92a and the lower surface of the lower front chain rail 92b and moves in a circular motion along a trajectory that reaches the front end of the upper chain rail 93.

[0045] The feed chain 96 is wound around a drive sprocket 94, a plurality of driven sprockets 95 (at the front and rear ends), and a tension roller 90, and is driven to rotate.

[0046] The tension roller 90 is provided at the same height as and in front of the drive sprocket 94, which reduces the vertical movement of the feed chain 96, suppresses sliding resistance, and reduces the load.

[0047] Furthermore, the front end of the upper chain rail 93 (front driven sprocket 95), tension roller 90, drive sprocket 94, lower central chain rail 92a and lower front chain rail 92b are arranged in a straight line or approximately in a straight line, which reduces the up and down movement of the feed chain 96, suppresses sliding resistance and reduces the load, preventing a decrease in work efficiency and work interruptions due to the feed chain 96 falling off.

[0048] In addition, the line of the lower central chain rail 92a is higher than the line connecting the front end of the upper chain rail 93 and the drive sprocket 94, ensuring the winding angle of the feed chain 96 on the drive sprocket 94.

[0049] Furthermore, the rear end of the rail surface of the lower front chain rail 92b is above the axis of the drive shaft 94a of the drive sprocket 94 and the pivot shaft 90a of the tension roller 90, so that tension can be applied even if the feed chain 96 stretches.

[0050] Furthermore, the front-to-back length of the lower central chain rail 92a, which is the non-working side rail, is less than half the front-to-back length of the upper chain rail 93, which is the working side rail, and this length prevents the feed chain 96 from swinging, minimizing sliding resistance as much as possible, reducing the load, and preventing straw chips from being brought forward.

[0051] The chain rail main frame 91 has a front end 91F facing in the fore-and-aft direction welded to a mounting plate 91b, which is fixed to the left side surface of the left standing frame 59a of the pair of left and right standing frames 59a of the suspension base 59 with a bolt 91c, and the middle part is bent upward and extends diagonally upward toward the rear of the vehicle.

[0052] Therefore, since the rear of the chain rail main frame 91 extends diagonally upward, there is space below the rear of the chain rail main frame 91, making it easier to maintain the drive belt, which is arranged inside the body of the machine rather than the chain rail main frame 91.

[0053] The front end of the front end portion 91F of the chain rail main frame 91 is welded and fixed to the mounting plate 91b so that it is positioned forward of the rear bolt 91c and forward of the midpoint between the front bolt 91c and the rear bolt 91c, thereby increasing the mounting rigidity of the front end portion 91F of the chain rail main frame 91.

[0054] A rear end portion 91R of the chain rail main frame 91 is connected by a connecting plate 97 to the lower front end of the lower central chain rail 92a, which is the non-working rail.

[0055] A drive sprocket stay 98 is fixed to the rear of the chain rail main frame 91 in a direction perpendicular to the chain rail main frame 91, and supports the outer center of the drive sprocket 94 so as to be able to rotate freely.

[0056] The drive sprocket stay 98 is disposed below the lower central chain rail 92a and is positioned so as to overlap the outer side of the counter pulley 99 that transmits the driving force to the threshing device 10 by belt.

[0057] Therefore, the drive sprocket stay 98 also functions as a safety guard.

[0058] In addition, on the underside of the part of the chain rail main frame 91 that is bent diagonally upward toward the rear, a belt cover stay 15 is provided to engage the front part of the front belt cover 11 that covers the left outer side of the transmission belt that transmits driving force from the counter pulley 99 to the threshing device 10.

[0059] Therefore, since the belt cover stay 15 is provided below the part of the chain rail main frame 91 that is bent obliquely upward toward the rear, it does not get in the way of maintenance work that requires removing the front belt cover 11, etc.

[0060] In addition, the belt cover stay 15 is located below the drive sprocket stay 98, below the part of the chain rail main frame 91 that is bent diagonally upward toward the rear, so that the chain rail main frame 91 and the drive sprocket stay 98 block straw chips and the like that fall from above, preventing the straw chips and the like from getting caught and accumulating, and preventing fires caused by frictional heat from the transmission belt on the side.

[0061] In addition, the base of a chain cover stay 17 that engages the front part of the chain cover 13 that covers the left outside of the feed chain 96 is welded and fixed to the rear end of a trapezoidal mounting plate 16, the base of which is welded and fixed to a position below the drive sprocket stay 98 at the midpoint of the plate that extends diagonally upward toward the rear of the chain rail main frame 91.

[0062] Therefore, the chain cover stay 17 is located below the drive sprocket stay 98, below the part of the chain rail main frame 91 that extends diagonally upward to the rear, and the chain rail main frame 91 and the drive sprocket stay 98 block straw chips and the like falling from above, preventing the straw chips and the like from getting caught and accumulating, and preventing fires caused by frictional heat from the transmission belt located below.

[0063] In addition, the mounting plate 16 (corresponding to the base of the chain cover stay 17 of the present invention) is located outside the machine body of the counter pulley 99, and is positioned so that it laps (overlaps) the counter pulley 99 in a side view, and also functions as a safety guard.

[0064] The front of the chain cover 13 is fitted with a net (wire mesh) for heat dissipation, and frames such as the chain rail main frame 91 are arranged around the net to act as a guide when heat is dissipated from the net.

[0065] In addition, the front of the chain rail main frame 91 is welded to a mounting plate 91b fixed to the left side of the left standing frame 59a, and the lower front chain rail 92b, which is integrally formed at the bottom of the front end of the upper chain rail 93, are connected by a reinforcing frame 60, improving the rigidity of the upper chain rail 93 and the lower front chain rail 92b.

[0066] The connection position between the lower end of the reinforcing frame 60 and the mounting plate 91b is below the upper chain rail 93 and the lower front chain rail 92b and above the chain rail main frame 91, and the reinforcing frame 60 is arranged through the inside of the feed chain 96 body.

[0067] In addition, the chain rail main frame 91 is configured to be located below the drive sprocket 94, and by arranging the drive sprocket 94 in a position surrounded by frames such as the chain rail main frame 91 and the reinforcing frame 60, a strong configuration is achieved.

[0068] In addition, the working surface of the chain rail 92a is positioned above the line connecting the centers of the driven sprocket 95 and the drive sprocket 94, so that the drive sprocket 94 properly engages with the feed chain 96 to properly drive and rotate the feed chain 96, preventing errors in transporting straw due to slack in the feed chain 96 or work interruptions due to the feed chain 96 falling off.

[0069] Furthermore, even if the feed chain 96 begins to stretch due to deterioration over time, the chain rail 92a can apply tension to it to provide the correct tension, preventing work interruptions due to incorrect transport of the stalks or the feed chain 96 falling off.

[0070] In summary, by positioning the chain rail main frame 91 below the drive sprocket 94, which is susceptible to load, the strength is improved and the feed chain drive mechanism 9 is driven to rotate appropriately.

[0071] Finally, the drive configuration of the drive sprocket 94 will be described.

[0072] A feed chain drive gear case 31 is fixed to the upper part of a vertical frame 30 whose base is fixed to the machine frame 2.

[0073] The feed chain drive gear case 31 is disposed between the suspension base 59 and the counter pulley 99 .

[0074] A drive shaft 94a is provided at the top of the feed chain drive gear case 31 so as to be rotatable in the left-right direction of the machine body, and an input shaft 32a is provided at the bottom so as to be rotatable in the left-right direction of the machine body.

[0075] A drive sprocket 94 is spline-engaged with the tip of the drive shaft 94a, and an input pulley 32 is fixed to the tip of the input shaft 32a.

[0076] The drive shaft 94a and the base of the input shaft 32a are connected to each other by a chain and gear transmission mechanism 33.

[0077] A transmission belt 35 is wound around the output pulley 34, which rotates by the driving force of the engine 3 and is located near the front end of the upper chain rail 93 at the top of the left upright frame 59a, and the input pulley 32. Tension is applied to the transmission belt 35 by a tension pulley 36, and the driving force of the engine 3 is transmitted to the input pulley 32, and the driving force is transmitted via the input shaft 32a, chain and gear transmission mechanism 33, and drive shaft 94a to drive and rotate the drive sprocket 94.

[0078] The output pulley 34, input pulley 32, tension pulley 36 and transmission belt 35 are positioned forward of the counter pulley 99 and below the tension roller 90 of the feed chain 96, making maintenance easy.

[0079] In addition, the base of the holder 37 is fixed to the counter pulley support stay 36' that supports the counter pulley 99, and a through hole 37a provided at the tip of the holder 37 passes through the cylindrical portion 31a of the feed chain drive gear case 31 that rotatably supports the drive shaft 94a of the drive sprocket 94, thereby increasing the strength of the drive shaft 94a portion.

[0080] Therefore, the drive shaft 94a of the drive sprocket 94 is long in the left-right direction, but the holder 37 supports the tubular portion 31a of the feed chain drive gear case 31, which supports the drive shaft 94a so that it can rotate freely (preventing vibration in the front-to-back and up-to-down directions, but not fixing it in the left-to-right direction of the machine body, i.e., the thrust direction), thereby preventing vibration of the drive shaft 94a in the up-to-down and front-to-back directions, preventing damage to the transmission mechanism and feed chain drive gear case 31, and preventing oil leakage from the case, etc.

[0081] The holder 37 is fixed to the counter pulley support stay 36' by a bolt 38 so that the fixing position can be adjusted freely in the front-rear and up-down directions.

[0082] FIG. 6 is a perspective view showing a locking device 71 that locks the radiator cover 70 in the closed state.

[0083] A radiator is provided on the right outer side of the engine 3, which is located below the operating section 22 where the operator's seat 21 is located. To facilitate maintenance of the radiator, a radiator cover 70 is provided on the right outer side of the radiator, pivoted at either the front or rear end so that it can be opened and closed freely.

[0084] A locking member 71 is provided on the other of the front and rear ends of the radiator cover 70 to lock the radiator cover 70 in the closed state when the radiator cover 70 is closed.

[0085] The locking device 71 is composed of a locking pin 71a that extends in the front-to-rear direction and has its base fixed to the radiator cover 70, and a locking clip 71b that is formed from a spring plate into which the locking pin 71a fits from the outside and is fixed to the machine frame.

[0086] Therefore, since the locking device 71 is composed of the locking pin 71a and the locking clip 71b, it has a simple structure and is inexpensive, improving the profitability of the combine.

[0087] In addition, the locking device 71 may be configured so that one locking pin 71a fits into two or more locking clips 71b, or two or more locking pins 71a may be provided so that one locking pin 71a fits into one locking clip 71b.

[0088] When using a combine harvester to harvest culms in a field, workers may manually harvest culms that grow near the edge of the field where moving the harvester against concrete ridges or utility poles could damage them, or near the entrances and exits of the field where it is difficult to level the harvester to the field surface, using a sickle or similar tool. After harvesting with the combine harvester, any culms that the harvester was unable to harvest may also be manually harvested.

[0089] When culms are harvested by hand, the ears, which are clusters of grains, remain attached to the tips of the stems and leaves, and separating the grains by hand is a time-consuming and labor-intensive process.

[0090] Therefore, when stalks are harvested manually, they are typically set between the upper and lower conveying ends of the clamping rod 18 and the feed chain 96, and then sent to the threshing path by the threshing device 10, a process known as manual threshing. The stalks are then automatically threshed, sorted, and transported to the grain tank 8, just as with stalks harvested by the harvesting device 5, thereby saving labor and time.

[0091] This manual threshing operation is performed by turning off the running clutch 42, which turns on and off the transmission of power to the crawler 41 of the traveling device 4, and the threshing clutch 101, which turns on and off the transmission of power to the feed chain drive mechanism 9 and the threshing device 10, and then moving the manual threshing operation lever 110, which is located between the front and back of the harvesting device 5 and the feed chain 96, in the inward direction, for example, towards the front of the machine body.This turns on the threshing clutch 101, transports the set stalks to the rear, and automatically performs threshing and sorting operations.

[0092] At this time, if the output setting of the engine 3 or the continuously variable transmission (HST) 39 is high, the feed chain 96 will be driven at high speed, and the worker may not be able to let go of the straw and may be pulled towards the rear of the machine. Also, in the unlikely event that the worker is pinched between the clamping rod 18 and the feed chain 96, when the hand-threading operation lever 110 is turned on, the output of the engine 3 and the continuously variable transmission 39 is reduced and the drive speed of the feed chain 96 is kept low.

[0093] This prevents the worker from having the stalks pulled strongly by the feed chain 96, and allows the stalks to be fed steadily and sequentially, improving work safety.

[0094] However, when the manual threshing lever 110 is turned on, the driving force is transmitted to the feed chain drive mechanism 9 almost simultaneously, and the feed chain 96 starts to move, making it difficult for the worker to insert the straw at his own timing.

[0095] To address this problem, an intention operation mechanism 200 is provided so that even if the threshing clutch 101 is engaged by operating the manual threshing operation lever 110 and transmission is transmitted to the feed chain drive mechanism 9, the feed chain 96 will not operate unless the operator intentionally operates it.

[0096] 7 and 8, a tension pulley 36 is rotatably mounted on one end of the vertical frame 30, and a tension arm 201 having a rotation fulcrum is rotatably provided on the other end, and a tension switching spring 202 is provided to rotate the tension arm 201 in the direction in which the tension pulley 36 moves away from the transmission belt 35. A tension switching cylinder 203 is provided to rotate the tension arm 201 in the direction in which the tension pulley 36 contacts the transmission belt 35 against the biasing force of the tension spring 202 when an operation to transmit power to the feed chain drive mechanism 9 or the threshing device 10 is performed.

[0097] The tension switching cylinder 203 is designed to be capable of extending to a position where, even when contracted, that is, when the tension arm 201 is rotating in the direction in which the tension pulley 36 moves away from the transmission belt 35, the tension pulley 36 comes into contact with the transmission belt 35 and is in a tensioned state in which the driving force is transmitted, when a force capable of rotating the tension arm 201 against the biasing force of the tension spring 202 is applied.

[0098] One end of an intention wire 204 is connected to the tension arm 201, and the other end of this intention wire 204 is connected to an intention operation pedal 205 that rotates when stepped on. When this intention operation pedal 205 is stepped on, the intention wire 204 is pulled, and the connected tension arm 201 rotates the tension pulley 36 in the direction of contact with the transmission belt 35 against the biasing force of the tension spring 202, and the transmission of driving force to the feed chain drive mechanism 9 and the threshing device 10 begins. When the intention operation pedal 205 is stopped from being depressed, the intention wire 204 slackens, and the tension force of the tension spring 202 causes the tension arm 201 to rotate in the direction in which the tension pulley 36 moves away from the transmission belt 35, thereby cutting off the transmission of driving force to the feed chain drive mechanism 9 and the threshing device 10.

[0099] This causes the feed chain 96 to operate when the intention operating pedal 205 is depressed, allowing the worker to place the stalks on the threshing path while ensuring his or her own safety and that the stalks are securely clamped.

[0100] Furthermore, since the feed chain 96 operates only while the pedal is being pressed, the feed chain 96 can be stopped at any time, and as long as the working time is sufficient, the stalks can be sent safely and in the appropriate transport position to the threshing path.

[0101] The intention control pedal 205 must be operated by a worker standing near the transport start end of the feed chain 96 and outside the machine body, who is performing the work of loading the stalks, and as it is operated by stepping on it, it is desirable to install it in the field for use. However, if the intention control pedal 205 is installed outside the machine body and in contact with the field, it will cause problems such as damaging the field and knocking down unharvested stalks or cutting them down before harvesting, making it impossible to harvest and transport them with the reaping device 5. Furthermore, there is a risk of it coming into contact with ridges, utility poles, etc., and being damaged when moving, traveling, or turning.

[0102] 8(a) and 8(b), the intention operation pedal 205 is preferably configured to be detachable by providing a detachable member 204a such as a carabiner at one end of the intention wire 204, and when not in use, can be disconnected and placed in an empty space that does not interfere with the operation of the control unit 22. When threshing by hand, the worker places the intention operation pedal 205 in the field at the working position, removes the intention wire 204 stored below the threshing device 10, and makes it possible to operate the intention operation pedal 205 by stepping on it.

[0103] This prevents the intention operation pedal 205 from protruding outside the machine except when threshing by hand, thereby preventing damage due to contact and damage to the stalks and field surface.

[0104] Alternatively, as shown in Figure 9, a vertical storage space 206 may be formed by cutting out the lower side of the threshing side cover 10a provided in front of the chain cover 13 of the threshing device 10, and the intention operation pedal 205 may be inserted and stored in this storage space 206. In this case, the intention operation pedal 205 is composed of a flat base plate 205a that comes into contact with the field surface when in use, and a pedal plate 205b that can rotate up and down via a rotation support shaft 205c. The pedal plate 205b is configured to rotate upward (non-operating side) by the force of a spring (not shown), and rotates downward (operating side) when stepped on.When stored, the base plate 205a and the pedal plate 205b are aligned in a vertically approximately parallel position, and a concave pedal lock 207 clamps one end of the base plate 205a and the pedal plate 205b, restricting the upward rotation of the pedal plate 205b and setting the stored state to the state where the vertical width is at its minimum.

[0105] In the above state, the intention wire 204 remains pulled and the driving force is transmitted, so when the pedal is stored, the intention wire 204 is released. In this case, for example, if a connection part for the tension wire 204 is formed in the pedal lock 207 so that the tension wire 204 can be connected in a loose state when stored, it will be unnecessary to search for the end of the intention wire 204 that is the connection part when using the intention operation pedal 205, thereby improving work efficiency.

[0106] When the intention operating pedal 205 in the stored state is inserted into the storage space 206, the pedal lock 207 protrudes outward from the machine by approximately the same amount as the outer end of the threshing side cover 10a, and is configured to function as a cover, which prevents impurities from entering the inside, reduces the strange appearance of the machine, and improves its aesthetic appearance.

[0107] Alternatively, a portion of the threshing side cover 10 near the lower front of the threshing device 10 can be removed, and the intention operation pedal 205 can be attached via an attachment member such as an attachment hook (not shown) except when manual threshing is being performed, and when attached, the base plate 205a faces outward from the body and functions as a cover.

[0108] In the above configuration, the length of the intention wire 204 is such that when the pedal plate 205b is in the attached state, even if it comes into contact with the wall surface and is pushed, the intention wire 204 does not fully extend and remains slack, and no pulling force capable of resisting the biasing force of the tension spring 202 is generated.

[0109] As another example of the intention mechanism 200, as shown in Figures 10 and 11, a narrow culm guide 208 is provided in a rear-up tilted position below the threshing machine 10 and above the traveling device 4 to prevent long culms (so-called long culms) growing adjacent to the reaping position from coming into contact with the machine body. The long culm narrow guide 208 has a length approximately equal to the combined front-to-rear length of the chain cover 13 that covers the outside of the feed chain 96 and the threshing side cover 10a. When moved toward the front of the machine body by rotating guide arms 209, 209 attached to the machine body frame 2, the long culm narrow guide 208 moves away from the machine body frame 2 and protrudes outward, and when moved toward the rear of the machine body, it moves closer to the machine body frame 2. An intention sensor 210 is also provided on the machine body frame 2 to determine whether the narrow culm guide 208 is approaching or moving away.

[0110] The long culm narrow guide 208 is arc-shaped or dish-shaped and protrudes outward from the machine body, allowing the surface to slide when in contact, thereby reducing impact.

[0111] When the vehicle speed sensor 211 (see Figures 10 and 13), which determines whether the vehicle is running based on the rotation speed of the travel transmission shaft (not shown) of the traveling device 4 and calculates the traveling speed, determines that the vehicle is running, the threshing clutch 101 is switched on and off by the operator, regardless of the determination of the intention sensor 210. This makes it possible to maintain the transmission state to the threshing device 10 whether the long culm narrow guide 208 is extended outside the body of the machine or not.

[0112] On the other hand, the operating seat 21 is provided with a seating sensor 21a that determines whether the operator is seated or not, and the vehicle speed sensor 211 detects the stopped state. When the seating sensor 21a does not detect the operator being seated, and the intention sensor 210 detects that the long stalk narrow guide 208 is approaching, even if the operator operates the hand-threshing operation lever 110, the threshing clutch 101 does not enter the on state and the feed chain 96 does not operate.

[0113] The rotation of the tension arm 201 can be achieved by using an electric or hydraulic cylinder for the tension switching cylinder 203, and the threshing clutch 101 can be turned on by operating the manual operation lever 110, but the tension switching cylinder 203 does not extend or retract, keeping the tension pulley 36 out of contact with the transmission belt 35, and preventing the feed chain 96 from operating.

[0114] On the other hand, when the intention sensor 210 detects that the long culm narrow guide 208 is separated, the tension switching cylinder 203 extends, bringing the tension pulley 36 into contact with the transmission belt 35, and the feed chain 96 operates.

[0115] At this time, since the long culm narrow guide 208 protrudes outside the machine body, the worker works at a position slightly away from the machine body. Therefore, clothing or towels will not be caught in the drive parts of the feed chain 96, etc., and work safety is improved.

[0116] Furthermore, the long culm narrow guide 208 makes it less likely that the tips of adjacent unharvested culms will be damaged, thereby preventing a decline in the quality of the harvested crop.

[0117] Furthermore, if the surface of the long culm narrow guide 208 is coated with a fluororesin or the like to make it more slippery, the protective effect on the tips of the culms can be further improved.

[0118] As shown in Figure 12, the long culm narrow guide 208 may be attached to a telescopic or rail-type slide mechanism 213, 213, so that its fore-and-aft position relative to the machine body remains unchanged and it can be switched between a state approaching the machine body and a state extending (away) from it.

[0119] Even with the above configuration, it is possible to prevent the operator from getting too close to the machine body during manual threshing work, and to prevent the operator from coming into contact with and damaging the tips of the stalks during reaping work.

[0120] The base sides of both the rotation guide arm 209 and the slide mechanism 213 are arranged facing outward from one of the left and right sides of the machine body frame 2 .

[0121] If the rotating guide arms 209, 209 of the above configuration are configured to lock in rotation in that position when switched between an approaching state and a away state, it can be prevented from moving due to vibrations from the machine body or contact with the operator. However, if the long stalk narrow guide 208 is in the away state, there is a risk that it will be dented or the rotating guide arms 209, 209 will bend or be damaged when it comes into contact with a high ridge or wall at the edge of the field.

[0122] Therefore, the rotating guide arms 209, 209 may be equipped with a tumbler mechanism that maintains the state by crossing a fulcrum when the long culm narrow guide 208 is rotated until it is in a close or separated state, and when the long culm narrow guide 208 comes into contact with a high ridge, wall, etc. and a force is applied, it moves in the opposite direction, crossing the fulcrum, and approaches a close state, thereby allowing the long culm narrow guide 208 and the rotating guide arms 209, 209 to retract before they are damaged.

[0123] In the case of the slide mechanism 213, a spring biases the long culm narrow guide 208 toward the outside of the machine body, i.e., toward the side where the guide is in the separated state, and when the guide is pushed toward the side where the guide is in the close state, the guide is locked. When the long culm narrow guide 208 is lightly pushed toward the inside of the machine body in this locked state, the lock is released and the guide can be moved toward the side where the guide is in the separated state.

[0124] In this configuration, when the slide mechanism 213 comes into contact with a high ridge, a wall, or the like, it contracts and allows the long culm narrow guide 208 to retreat, thereby preventing or minimizing damage.

[0125] The general shape of the long culm narrow guide 208 is as described above, but the long culm narrow guide 208 may be made by processing a cylindrical round pipe or a square pipe with curved rather than square corners, thereby reducing the contact area with high ridges, walls, etc., and making it less likely to break.

[0126] During reaping and harvesting, in addition to the above-mentioned manual threshing work, the operator may get off the operator seat 21 to clear stalk blockages, to discharge grain from the grain tank 8, or to take a break. If the reaping device 5, threshing device 10, or other parts that cut and transport the stalks are left running at this time, there is a risk of injury if the operator comes into contact with the cutting blades, chains, etc.

[0127] Therefore, when the seating sensor 21a of the operating seat 21 goes into a non-detection state, it is determined that the worker has dismounted, and power transmission to the harvesting device 5 and threshing device 10 is cut off, stopping parts that would be dangerous if driven when the worker approaches the machine body.

[0128] However, when an operator needs to secure visibility or adjust his / her seating position, he / she may temporarily leave the operating seat 21, which may lead to the operator mistaking that the operator has dismounted, resulting in the power transmission to the reaping device 5 and the threshing device 10 being cut off. In some configurations, the power transmission to the traveling device 4 is also cut off at this time, but even if the driving force is cut off, the machine body will still move slightly in the direction of travel (towards the front of the machine body) due to inertia, and there is a risk that the machine will crash into the stalks growing in the field, causing them to fall over or crushing the tips of the grain, which are the harvesting parts.

[0129] In addition, the stalks that are being harvested and transported will stop midway, and the threshing operation will also be interrupted, which could result in the stalks becoming clogged due to poor transport or reduced threshing accuracy.

[0130] Therefore, as shown in Figure 13, a boarding / alighting partition bar 214 of a length sufficient to block the operator's boarding / alighting opening on the side of the operator's seat 21 (on the left or right side of the machine body) in the front-to-back direction is attached so as to be rotatable in the vertical direction with either the front or rear side of the boarding / alighting opening as a pivot point, and a partition support stay 215 that receives the boarding / alighting partition bar 214 is provided on the other side, and a partition switch 216 that determines whether the boarding / alighting partition bar 214 is in contact with this partition support stay 215 is provided.

[0131] When the partition switch 216 is turned on, the boarding / alighting partition bar 214 is rotated downward to block the boarding / alighting opening, and it is determined that an operator is on board. At this time, even if the seating sensor 21a is in a non-detecting state, it is assumed that the operator is in the operating section 22, so the tension switching cylinder 203 does not extend or retract, the tension arm 201 maintains the tension pulley 36 in contact with the transmission belt 35, and power transmission to the reaping device 5 and the threshing device 10 continues. Note that the transmission of power to the traveling device 4 at this time is not linked, and is in a traveling or stopped state depending on the operator's operating state.

[0132] On the other hand, when the partition switch 216 is turned off, it is determined that the boarding / alighting partition bar 214 has been rotated upward to open the boarding / alighting door and that the worker has dismounted. At this time, the tension switching cylinder 203 is extended to rotate the tension arm 201, and the tension pulley 36 is retracted from the transmission belt 35, thereby cutting off the driving force to the reaping device 5 and the threshing device 10.

[0133] When dismounting, the output of the continuously variable transmission 39 is basically set to a neutral state, so the traveling device 4 is often in a stopped state, but when the vehicle speed sensor 211 determines that the vehicle is traveling, the transmission to the traveling device 4 may be cut off (by disengaging the clutch, setting the output of the continuously variable transmission 39 to a neutral state, etc.) when the partition switch 216 is turned off.

[0134] When an operator who has dismounted turns the boarding / disembarking partition bar 214 downward to turn the partition switch 216 on, power transmission to the reaping device 3 and the like becomes possible, and in this state, safety cannot be ensured when working outside the machine. Therefore, when the partition switch 216 goes from the off state to the on state, it is desirable to configure the tension switching cylinder 203 not to expand or contract, and power transmission to the reaping device 5 and threshing device 10 to remain cut off until the continuously variable transmission 39 is switched from neutral to forward output.

[0135] When the operator gets on the machine, the boarding / alighting partition lever 214 is rotated upward to separate it from the partition support stay 215 and the partition switch 216 is turned off, and the transmission remains disconnected. However, even if the operator rotates the boarding / alighting partition lever 214 downward to contact the partition support stay 215 and turns the partition switch 216 on, the transmission remains disconnected. In this state, when the continuously variable transmission 39 is operated to output power in the forward direction from neutral, the transmission is released from the disconnected state and reaping work resumes. This allows the reaping device 5 and threshing device 10 to remain immobile at least until the operator gets on and operates the machine to move forward, ensuring safety around the machine.

[0136] Furthermore, when the seating sensor 21a detects that an operator has sat in the operating seat 21, the continuously variable transmission 39 is operated to output power in the forward direction, and the harvesting device 5 and threshing device 10 are configured to switch from a disconnected state to a transmission state, thereby preventing the operator from losing his / her balance when the machine starts moving.

[0137] The partition switch 216 may be provided on the side of the rotation support shaft (not shown) of the boarding / alighting partition bar 214 instead of on the partition receiving stay 215 .

[0138] In this case, when the partition switch 216 is in the on state, it is determined that the boarding / alighting door is in an open state, and when it is in the off state, it is determined that the boarding / alighting door is in a blocked state.

[0139] With the above configuration, when an operator is on board the control section 22, the boarding / alighting partition bar 214 indicates the boundary of the control section 22 to the operator and also prevents the operator from moving his / her body, thereby preventing the operator from accidentally moving from the control section 22 to the outside of the aircraft.

[0140] Therefore, it is desirable to provide the boarding / alighting partition bar 214 near the top of the boarding / alighting entrance.

[0141] Furthermore, when a worker dismounts and places the boarding / disembarking partition bar 214 in a state in which it is supported by the partition support stay 215, it can be used as a handrail when getting on and off, thereby stabilizing the worker's posture when getting on and off.

[0142] When the boarding / alighting partition bar 214 is used as a handrail, the weight of the worker is placed on it, so in order to prevent deformation or damage, it is desirable that the boarding / alighting partition bar 214 be made of metal, or have a metal rod as its core and be covered with a soft material such as rubber or sponge.

[0143] Furthermore, by making the boarding / alighting partition bar 214 cylindrical, it becomes easier for the worker to grasp the boarding / alighting partition bar 214 and it is possible to reduce the impact when the worker's legs or other parts come into contact with the boarding / alighting partition bar 214 while entering the control section 22.

[0144] The above-mentioned partition support stay 215 is made of an elastic resin material that is supported in the Ω-shaped portion, and is configured so that when the boarding / alighting partition bar 214 is rotated downward to make contact, it must be pushed in with force, and when it is rotated upward to separate, it must be pulled out with force.

[0145] This prevents the boarding / alighting partition bar 214 from coming off the partition receiving stay 215 when it is used as a handrail or when an operator is on board the control section 22, thereby preventing the operator's boarding / alighting posture from being disturbed or the operator from getting out of the aircraft from the control section 22. [Explanation of symbols]

[0146] 4 Running gear 5 Reaping device 9 Feed chain drive mechanism 10 Threshing equipment 21 Control seat 21a ·BR>·Tasensor (seating determination component) 35 Transmission belt (transmission member) 39 Continuously variable transmission 96 Feed Chain 110 Hand-operated operation lever (transport operation lever) 200 Intention Mechanism 201 Tension arm (transmission switching member) 202 Tension switching spring (biasing member) 204 Connecting Wire 203 Tension switching cylinder (switching actuator) 205 Intention operation pedal (operating member) 205a Base plate (plate) 207 Pedal lock (locking component) 208 Long culm narrow guide (culm guide body) 210 Intention sensor (position determination component) 211 Vehicle speed sensor (travel detection member) 214 Boarding and alighting partition bar (partition member) 215 Partition support stay (support member) 216 Partition switch (partition determination member)

Claims

1. A harvesting machine comprising an operating seat (21), a running device (4), a harvesting device (5), and a threshing device (10), a feed chain drive mechanism (9) for transporting stalks to the threshing device (10), and a transport operation lever (110) for setting manually harvested stalks and transporting them to the feed chain drive mechanism (9) in front of the feed chain drive mechanism (9), a transmission member (35) for transmitting a driving force to the feed chain drive mechanism (9), and a transmission switching member (201) for switching the transmission member (35) between a transmission state and a non-transmission state; An intention mechanism (200) is provided to move the transmission switching member (201) to a transmission position, and the feed chain drive mechanism (9) operates by operating the conveying operation lever (110) only when the intention mechanism (200) is being operated. The intention mechanism (200) is composed of an operating member (205) that operates to move the transmission switching member (201) to a transmission position, a connecting wire (204) that connects the operating member (205) and the transmission switching member (201), and a biasing member (202) that biases the transmission switching member (201) to a non-transmission position, When the operating member (205) is operated, the connecting wire (204) moves the transmission switching member (201) to the transmission position, A harvesting machine characterized in that, when the operating member (205) is not operated, the biasing member (202) moves the transmission switching member (201) to a non-transmission position.

2. The intention mechanism (200) is attached to a plate (205a) together with an operation lock member (207), and the plate (205) is configured to be detachable from a cover (10a) provided on the outside of the body of the threshing device (10); The harvesting machine according to claim 1, characterized in that the connecting wire (204) is configured to be detachable from the operating member (205), and the detached connecting wire (204) is configured to be connectable to the operating lock member (207).

3. A stalk guide body (208) is provided outside the body of the threshing device (10) and below the feed chain drive mechanism (9) to receive and push back stalks adjacent to the reaping position, and the stalk guide body (208) is configured to be movable toward and away from the threshing device (10); The intention mechanism (200) is composed of a position determination member (210) that determines whether the stalk guide body (208) is on the separating side or the approaching side, a seating determination member (21a) that determines whether an operator is seated in the operating seat (21), a traveling determination member (211) that determines whether the traveling device (4) is in a traveling state or a stopped state, and a switching actuator (212) that moves the transmission switching member (201) between a transmission position and a non-transmission position, A harvesting machine as described in claim 1, characterized in that when the position determination member (210) determines that the straw guide body (208) is on the separated side, the seating determination member (21a) determines that there is no operator in the operating seat (21), and the running determination member (211) determines that the machine is stopped, the switching actuator (212) is activated to move the transmission switching member (201) to the transmission position.

4. a partition member (214) for switching the entrance / exit port of the operating seat (21) between an open state and a blocked state is provided so as to be rotatable, a receiving member (215) for receiving the partition member (214) in the blocked state is provided, and a partition determining member (216) for determining whether the partition member (214) is in the open state or the blocked state is provided; a switching actuator (212) for moving the transmission switching member (201) between a transmission position and a non-transmission position; A harvesting machine as described in any one of claims 1 to 3, characterized in that when the partition determination member (216) determines an open state, the switching actuator (212) moves the transmission switching member (201) to a non-transmission position.

5. A continuously variable transmission (39) for transmitting a driving force is provided to the traveling device (4), and a traveling detection member (211) is provided for calculating the traveling speed of the traveling device (4) and determining whether the vehicle is in a traveling state or a stopped state. A harvesting machine as described in claim 4, characterized in that after the partition determination member (216) determines an open state, the partition member (214) is brought into contact with the receiving member (215) to determine a blocked state, and the switching actuator (212) does not operate until the determination of the travel detection member (211) switches from a stopped state to a traveling state.

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