JP2005160380A - Self-propelled truck and self-propelled spreader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-propelled truck standing both rainwater and impact, seldom going to mulfunction, and having automatic changeover function in advancing directions. <P>SOLUTION: This self-propelled truck includes an advancing direction changeover operative member 36 shiftable between an advancing operative position B1 and a receding operative position B2 and a butt shifting member 39 that shifts from a non-butting position A1 to a butting position A2 when this truck butted on obstacle(s) T in traveling in the forward direction F. In this truck, the member 39 and the member 36 are coordinated in actuation with each other so that the member 36 automatically shifts from the position B1 to the position B2 on mechanically interlocking with the shifting action of the member 39 from the position A1 to the position A2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a self-propelled carriage having a traveling direction automatic switching function that automatically switches to backward traveling when it reaches a destination in advance, for example, reciprocating along a fence between farms. However, the present invention relates to a self-propelled cart that is suitable for use as a cart of a self-propelled spreader that sprays a liquid such as a fertilizer solution or a pesticide solution onto a crop. The present invention also relates to a self-propelled spreader in which a spray nozzle and a spray control operation member that controls spray from the spray nozzle are mounted on the self-propelled carriage.

  The self-propelled spreader as described above includes a vehicle body, an engine as a travel drive source of the vehicle body, and a hydraulic motor that is hydraulically driven by a hydraulic pump to change the travel speed and travel direction of the vehicle body. Based on a drive transmission (HST), a spray control valve that controls spray from the spray nozzle, a detector that is provided in front of and behind the vehicle body and that detects an end of a brim, and a detection signal from the detector A device including a hydrostatic drive transmission and a controller that controls the spray control valve is known (see Patent Document 1 below).

  In the following Patent Document 1, a limit switch and an optical sensor are listed as the detector, and a sequence including a relay and a diode and a microcomputer are listed as the controller.

The self-propelled sprayer is disposed at one end of a farm ridge, and sprays a chemical or the like from the spray nozzle while self-propelled toward the other end (termination) of the ridge by driving the engine. To do. When the vehicle body reaches the end portion of the intercostal space, the detector detects an obstacle such as a pile standing in advance at the end portion, and a control signal is issued from the controller based on the detection signal. The hydrostatic drive transmission and the spray control valve are automatically controlled so that the traveling direction of the vehicle body is switched to the opposite direction and the spray from the spray nozzle is controlled.
Japanese Patent Laid-Open No. 9-9803

  However, in the conventional configuration, as a means for detecting the turning point of the vehicle body as a destination, that is, the terminal portion of the ridge, and automatically switching the traveling direction of the vehicle body, As the means for controlling the opening and closing of the control valve, the electric or electronic parts as described above are used, so that there is a drawback that they are inevitably vulnerable to rain water and impacts. Therefore, although the conventional self-propelled spreader is suitable for use in a cultivation house, it has a problem that it is not suitable for use in the outdoors for spraying crops grown in the open field.

  The present invention has been made in view of the circumstances as described above, and is intended to provide an inexpensive self-propelled carriage and self-propelled spreader that are resistant to rainwater and shock, are not easily damaged, and have a traveling direction automatic switching function. To do.

  In order to solve the above-described problems, the self-propelled carriage according to the present invention is unappropriate by contacting a travel direction switching operation member that is displaceable between a forward operation position and a reverse operation position and an obstacle when traveling in the forward direction. A contact displacement member that is displaced from the contact position to the contact position, and mechanically interlocked with the displacement operation of the contact displacement member from the non-contact position to the contact position. The contact displacement member and the traveling direction switching operation member are operatively linked to each other so that the traveling direction switching operation member is automatically displaced from the forward operation position to the backward operation position. Item 1).

  According to the present invention, when the contact displacement member contacts the obstacle during the forward traveling of the traveling carriage, the contact displacement member is displaced from the non-contact position to the contact position. . Then, the advancing direction switching operation member is automatically displaced to the reverse operation position in conjunction with the displacement operation of the contact displacement member to the corresponding contact position. As a result, the traveling direction of the self-propelled carriage is automatically switched, and reverse traveling is started.

  According to the present invention, the automatic switching of the traveling direction of the self-propelled carriage includes the displacement of the contact displacement member due to contact with the obstacle, and the displacement of the traveling direction switching operation member mechanically linked thereto. , Done by. That is, the automatic switching of the traveling direction of the self-propelled carriage does not require any electrical or electronic parts, and therefore has effects such as being resistant to rain water and impact, being hard to break down, and being inexpensive.

  In the present invention, the advancing direction switching operation member may change the meshing state of the gear between the forward gear and the reverse gear, or between the forward gear and the reverse gear. A circuit may be switched.

  As a preferred embodiment, an urging means for constantly urging the traveling direction switching operation member toward the reverse operation position, and the traveling direction switching operation member against the urging force of the urging means. A locking portion that is locked to the forward operation position, a release action member that releases the locked state of the forward direction switching operation member by the locking portion to the forward operation position, and the non-contact of the contact displacement member. It is also possible to provide an interlocking connecting member that mechanically interlocks with the displacement operation from the contact position to the contact position, and drives the release action member (claim 2).

  According to the configuration, when the contact displacement member contacts the obstacle and is displaced from the non-contact position to the contact position, the release member is driven via the interlocking connection member. Then, the locking state of the traveling direction switching operation member by the locking portion to the forward operation position is released. At that moment, the advancing direction switching operation member is displaced to the reverse operation position by the urging force of the urging means. For this reason, there exists an advantage by which the displacement of the said advancing direction switching operation member corresponding to the displacement of the said contact displacement member is achieved reliably and rapidly.

  On the other hand, a self-propelled spreader according to the present invention includes the self-propelled carriage, a spray nozzle attached to the self-propelled carriage, and a spray control operation member for controlling spraying from the spray nozzle. The spray control operation member is automatically operated from the first operation position to the second operation in conjunction with the displacement operation of the contact displacement member from the non-contact position to the contact position. The contact displacement member and the spray control operation member are operatively linked to each other so as to be displaced to a position (Claim 3).

  According to the self-propelled spreader, the self-propelled carriage moves forward to reach the destination, the contact displacement member comes into contact with an obstacle such as a pile arranged in advance at the destination, When the non-contact position is displaced from the non-contact position to the contact position, the travel direction switching operation member is automatically displaced from the forward operation position to the reverse operation position in conjunction with the displacement operation. At the same time, the spray control operation member is automatically displaced from the first operation position to the second operation position. As a result, the traveling direction of the self-propelled carriage is switched, and spraying from the spray nozzle is controlled.

  According to the present invention, the automatic switching of the traveling direction of the self-propelled carriage and the automatic control of the spray from the spray nozzle are the displacement of the contact displacement member due to the contact with the obstacle, and the mechanical And the displacement of the traveling direction switching operation member and the spray control operation member interlocked with each other. In other words, neither automatic switching of the traveling direction of the self-propelled carriage, nor control of spraying from the spray nozzle, nor any electrical or electronic parts are required, so it is resistant to rain and shock, and is not easily damaged. There are effects such as being inexpensive.

  Displacement of the advancing direction switching operation member and the spray control operation member performed in conjunction with the displacement of the contact displacement member can be performed by completely different mechanical interlocking systems, but a part of them is shared. It can also be performed by a mechanical interlocking system. For example, as a preferred embodiment, the spray control operation member is automatically linked to the first operation direction mechanically in conjunction with a displacement operation from the forward operation position to the reverse operation position of the advance direction switching operation member. The traveling direction switching operation member and the spray control operation member may be operatively linked to each other so as to be displaced from the operation position to the second operation position (Claim 4).

  In this case, when the abutting displacement member abuts on the obstacle and is displaced to the abutting position, the advancing direction switching operation member is displaced to the reverse operation position mechanically interlocking therewith. The spray control operation member is displaced to the second operation position mechanically in conjunction with the displacement of the traveling direction switching operation member to the reverse operation position. Therefore, the arrangement space of the mechanical interlocking system from the abutting displacement member to the traveling direction switching operation member and the spray control operating member, the parts for forming the mechanical interlocking system, etc. are completely different from each other. It is possible to save compared with the case where a mechanical interlocking system of the system is provided.

  As a preferred embodiment, the spray control operation member is a first operation position protruding into a displacement passage of the traveling direction switching operation member, and a second operation position separated from the displacement passage. The spray control operation member pushes out the spray control operation member from the displacement passage when the travel direction switching operation member is displaced from the forward operation position to the reverse operation position. It can also be displaced to the operating position (claim 5). In this way, the mechanical interlocking system from the traveling direction switching operation member to the spray control operation member has a very simple configuration, and the displacement operation is reliably transmitted, which is preferable.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  1 is a left side view of a self-propelled spreader according to an embodiment of the present invention, FIG. 2 is a plan view showing a traveling drive system of the self-propelled carriage of FIG. 1, and FIG. 3 is III of FIG. It is an arrow enlarged view.

  A self-propelled spreader 1 shown in FIG. 1 includes a self-propelled cart 2 according to an embodiment of the present invention, a self-winding hose reel 3 having a configuration known per se, and a nozzle having a number of spray nozzles 4. A tube 5 is mounted. The spray nozzle 4 is sprayed by a spray liquid pump 7 placed outside the self-propelled carriage 2 via a hose 6 wound around the hose reel 3. The spray liquid in the liquid source 8 is pumped.

  The self-propelled spreader 1 is suitable for spraying a liquid such as a fertilizer solution or a pesticide solution on a cultivated crop while traveling back and forth along a ridge between farms. That is, the self-propelled spreader 1 is disposed, for example, at one end portion between farm cages by an operator, while feeding out the hose 6 from the hose reel 3 that is idle, ) Toward the forward direction F. When the other end is reached, the traveling direction of the self-propelled carriage 2 is automatically switched to the reverse direction R, and the hose 6 is automatically wound around the hose reel 3 while the hose 6 is automatically wound. Drive backwards. Then, on the forward path, the return path, or both, a chemical solution or the like is sprayed from the spray nozzle 4 to the left and right crops. When the reciprocating spraying operation for one stroke is completed, the operator lifts one of the handle portions 9 and 10 disposed at the front and rear to cause the self-propelled sprayer 1 to move forward and backward to the right or left. The self-propelled sprayer 1 is moved to the next furrow and self-propelled spraying is performed in the same manner as described above.

  The travel drive system of the self-propelled carriage 2 will be described with reference to FIG. 2. The vehicle body 11 of the self-propelled carriage 2 includes rotatable axles 12 and 13 at the front and rear thereof. Wheels 18, 19, 20, and 21 are attached to the left and right ends of the axles 12 and 13 via appropriate one-way clutches 14, 15, 16, and 17, respectively.

  The axles 12 and 13 are rotationally driven by a hydraulic motor 22 as a traveling drive source mounted on the vehicle body 11. The power of the hydraulic motor 22 is transmitted to the axles 12 and 13 by transmission means including an intermediate shaft 23, sprockets 24, 25, 26, 27, 28, 29, chains 30, 31, 32, and the like.

  The one-way clutches 14, 15, 16, 17 interposed between the axles 12, 13 and the wheels 18, 19, 20, 21 are such that the self-propelled carriage 2 is directed in the forward direction F. The two wheels on the front side in the traveling direction become driving wheels and the two wheels on the rear side in the traveling direction become idle wheels when traveling in the reverse direction R. It arrange | positions so that it may act on the axles 12 and 13 in the reverse direction. For this reason, it is possible to travel with a small turn when maneuvering to the next furrow, in addition to having good furrow traveling characteristics when moving forward and backward.

  As shown in FIG. 1, the hydraulic motor 22 as a travel drive source is driven by hydraulic fluid fed by a hydraulic pump 33 mounted on the self-propelled carriage 2, and the hydraulic pump 33 is connected to the self-propelled carriage. 2 is driven by an internal combustion engine 34 mounted on the vehicle 2. A hydraulic circuit between the hydraulic pump 33 and the hydraulic motor 22 is provided with a flow path switching valve 35 that switches the flow path of the hydraulic oil to change the rotation direction of the hydraulic motor 22. Therefore, by swinging the traveling direction switching operation lever 36, which is an operation member of the flow path switching valve 35, the flow path of the hydraulic oil pumped to the hydraulic motor 22 is switched, and the self-propelled carriage The traveling direction of 2 is switched between forward F and reverse R.

  The hydraulic circuit includes a forward speed setting flow control valve and a reverse speed setting flow control valve (not shown) so that the traveling speed of the self-propelled carriage 2 can be arbitrarily set in advance during forward travel and reverse travel. Correspondingly, as shown in FIG. 1, metering knobs 37 and 38 that are freely rotatable as the forward speed setting operation member and the reverse speed setting operation member are, for example, the flow rate control. Arranged integrally with the valve. For this reason, for example, in the case of one-way spraying in which spraying is performed only during forward travel or reverse travel, the travel speed during non-spray travel is set to a high speed and the travel speed during spray travel is set to a low speed. Thus, it is possible to reliably spray the crop while shortening the time required for one step of work.

  As shown in FIGS. 1 and 2, a movable bumper 39 as a contact displacement member is disposed at the front portion of the vehicle body 11. The movable bumper 39 is supported by front ends of a pair of left and right bumper support arms 40 and 41 extending in the front-rear direction of the vehicle body 11, and the pair of left and right bumper support arms 40 and 41 is a predetermined amount with respect to the vehicle body 11. Only slidably supported in the front-rear direction. The movable bumper 39 comes into contact with or collides with an obstacle T such as a pile that is erected in advance at a terminal end portion of a furrow that is a turning-back point of the self-propelled carriage 2, so that the non-contact position A <b> 1. Is displaced to a contact position A2.

  Bumper return compression coil springs 42 and 42 are attached to the pair of left and right bumper support arms 40 and 41 as biasing means for constantly biasing the movable bumper 39 toward the front of the vehicle body 11, respectively. Yes. The connecting plate 43 that connects the rear end portions of the pair of left and right bumper support arms 40 and 41 abuts on the support plate 44 that slidably supports the pair of left and right bumper support arms 40 and 41. The movable bumper 39 is normally held at the non-contact position A1. When the self-propelled carriage 2 collides with the obstacle T while moving forward, the pair of left and right bumper support arms 40 and 41 overcome the urging force of the bumper return compression coil springs 42 and 42 and move backward. The movable bumper 39 is displaced rearward by a predetermined amount up to the contact position A2. When the movable bumper 39 moves away from the obstacle T, for example, when the self-propelled carriage 2 moves backward, the movable bumper 39 is not in contact with the urging force of the compression coil springs 42 and 42 for returning the bumper. It automatically returns to the hour position A1.

  As shown in FIG. 3, the advancing direction switching operation lever 36 as an advancing direction switching operation member swings up and down along a vertically long guide groove 46 formed in an operation lever guide plate 45 as an operation lever guide member. It is free to swing and can be swung to the left and right with a small width. The forward operation position B1 for moving the vehicle body 11 forward, the neutral position N for maintaining the stopped state of the vehicle body 11, and the vehicle body 11 moving backward. It is possible to perform a displacement operation freely to the lower reverse operation position B2 to be shown. Further, the traveling direction switching operation lever 36 is constantly urged toward the lower reverse operation position B2 by urging means such as a tension spring 47.

  The operation lever guide plate 45 is engaged with the advance direction switching operation lever 36 at the forward operation position B1 and the neutral position N against the urging force of the operation lever urging tension spring 47. As a part, a forward lever locking concave portion 48 and a neutral lever locking concave portion 49 extending horizontally from the upper end portion and the intermediate portion of the guide groove 46 are formed in a notch in two upper and lower stages. Therefore, the operator swings the traveling direction switching operation lever 36 upward against the urging force of the operating lever urging tension spring 47, and moves the traveling direction switching operation lever 36 in the lateral direction (FIG. 3), the movement direction switching operation lever 36 is moved in the forward operation position B1 by engaging the shaft portion 36a with either of the lever locking recesses 48 and 49. And the neutral position N can be stopped.

  In the present embodiment, the advancing direction switching operation lever 36 is automatically interlocked with the displacement operation of the movable bumper 39 from the non-contact position A1 to the contact position A2. The movable bumper 39 is operatively linked to each other so as to be displaced from the forward operation position B1 to the reverse operation position B2. A specific interlocking structure is as follows, for example.

  As shown in FIG. 3, on the back surface of the operation lever guide plate 45, the release for releasing the locked state of the forward direction switching operation lever 36 to the forward operation position B1 by the forward lever locking recess 48 is provided. As an action member, a swingable release action plate 50 is pivotally supported. The release action plate 50 is normally at a non-drive angle position C1 indicated by a dotted line in FIG. 3, but is mechanically displaced by the displacement of the movable bumper 39 from the non-contact position A1 to the contact position A2. 3, the shaft portion 36 a of the traveling direction switching operation lever 36 is swung in the clockwise direction as viewed in FIG. 3 around the pivot shaft 51 attached to the operation lever guide plate 45. Is pushed out from the lever locking concave portion 48 to the guide groove 46 at the time of forward movement.

  The release action plate 50 is operatively connected to the movable bumper 39 via a Bowden cable 52 that can be pushed and pulled as an interlocking connecting member. That is, as shown in FIG. 1, one end 53a of the outer tube 53 of the Bowden cable 52 is folded back at the front position of the vehicle body 11 to slide the pair of left and right bumper support arms 40, 41. The connection plate is fixed to the support plate 44 that is movably supported, and one end portion 54a of the inner wire 54 of the Bowden cable 52 connects the rear end portions of the pair of left and right bumper support arms 40 and 41 to each other. It is fixed to 43. On the other hand, the other end portion 53b of the outer tube 53 is fixed to an appropriate fixing member 64 in the vicinity of the operation lever guide plate 45 as shown in FIG. 3, and the other end portion 54b of the inner wire 54 is The release action plate 50 is fixed to the swinging end 50a.

  In the above configuration, when the movable bumper 39 collides with the obstacle T and travels from the non-contact position A1 to the contact position A2 while the self-propelled carriage 2 travels in the forward direction F. As shown in FIG. 1, the connecting plate 43 is displaced rearward via the pair of left and right bumper support arms 40, 41, so that the one end 54 a of the inner wire 54 has the outer tube 53. A tensile force in the direction of pulling out from the one end 53a acts. Correspondingly, a pulling force in the direction in which the outer tube 53 is pulled into the other end portion 53 b acts on the other end portion 54 b of the inner wire 54. As a result, the release action plate 50 is driven to swing in the clockwise direction as viewed in FIG. 3, and the release action plate 50 causes the shaft portion 36a of the traveling direction switching operation lever 36 to move to the forward lever. Pushed from the locking recess 48 to the right. At that moment, the advancing direction switching operation lever 36 is forcibly displaced along the guide groove 46 to the reverse operation position B 2 by the urging force of the operation lever urging tension spring 47. As a result, the hydraulic circuit for driving the self-propelled carriage 2 is switched, and the self-propelled carriage 2 automatically starts reverse travel.

  When the movable bumper 39 moves away from the obstacle T due to the start of reverse travel, the movable bumper 39 returns to the non-contact position A1 by the urging force of the bumper return compression coil springs 42, 42. The connecting plate 43 is displaced forward F through the pair of left and right bumper support arms 40, 41, and the release action plate 50 is returned to the original non-driving angular position C1 through the Bowden cable 52. And return. Although not shown, it is preferable to provide an urging unit that constantly urges the release action plate 50 in a direction to return the release driving plate 50 to the non-drive angle position C1.

  In the self-propelled spreader 1, the spray from the spray nozzle 4 is automatically controlled in conjunction with the displacement of the movable bumper 39 to the contact position A2. Yes. Specifically, in the case of one-way spraying in which spraying is performed only on one of the forward traveling and the reverse traveling of the self-propelled carriage 2, the traveling direction of the self-propelled carriage 2 is automatically switched and the spray nozzle 4 Spray start or stop control is also automatically performed.

  That is, as shown in FIG. 1, the spray liquid passage 55 extending from the spray liquid pump 7 to the spray nozzle 4 is used for controlling spray from the spray nozzle 4 when the pump 7 is operated. As a spray control operation member, a cock lever 56 of a channel opening / closing cock is provided. The cock lever 56 is automatically operated from the first operation position D1 to the second operation in conjunction with the displacement operation of the movable bumper 39 from the non-contact position A1 to the contact position A2. The movable bumper 39 is operatively linked to each other so as to be displaced to a position D2 (see FIG. 3).

  The displacement of the cock lever 56 that is performed in conjunction with the displacement of the movable bumper 39 is a mechanical interlocking system that is completely independent of the mechanical interlocking system from the movable bumper 39 to the traveling direction switching operation lever 36. It can also be realized by providing. However, if it is performed by a mechanical interlocking system that shares a part of them, the arrangement space of the mechanical interlocking system from the movable bumper 39 to the traveling direction switching operation lever 36 and the cock lever 56, The parts and the like for forming the mechanical interlocking system can be saved as compared with the case where a completely separate mechanical interlocking system is provided, and can be manufactured at low cost.

  Therefore, in the present embodiment, the following configuration is adopted.

  That is, as shown in FIG. 3, a conduit 57 constituting a part of the spray liquid passage 55 is disposed adjacent to the guide groove 46 of the operation lever guide plate 45, and the conduit The cock lever 56 is disposed on 57. The cock lever 56 protrudes slightly below the neutral lever locking recess 49 of the displacement passage 58 of the traveling direction switching operation lever 36 (the left-side operation position as viewed in FIG. 3). ) D1 and the second operation position that is pushed out of the displacement passage 58 and separated from the displacement passage 58 by the displacement operation of the traveling direction switching operation lever 36 from the forward operation position B1 to the backward operation position B2. (Operation position downward as viewed in FIG. 3) D2.

  In this configuration, when the movable bumper 39 contacts the obstacle T and is displaced to the contact position A2, the traveling direction switching operation lever 36 is mechanically interlocked with the reverse operation position B2. The cock lever 56 is pushed out from the displacement passage 58 of the traveling direction switching operation lever 36 mechanically in conjunction with the displacement of the traveling direction switching operation lever 36 to the backward operation position B2. Then, the second operation position D2 is displaced.

  Therefore, for example, the pipeline 57 is closed at the first operation position D1, and the pipeline 57 is opened at the second operation position D2. If the cock lever 56 is positioned at the first operation position D1, the spray from the spray nozzle 4 is not performed when the self-propelled carriage 2 moves forward. When the self-propelled carriage 2 reaches the end of the furrow, the movable bumper 39 collides with the obstacle T, and the traveling direction switching operation lever 36 is displaced to the reverse operation position B2, The cock lever 56 is pushed out of the displacement passage 58 of the traveling direction switching operation lever 36 and displaced to the second operation position B2, and from the spray nozzle 4 during the backward traveling of the self-propelled carriage 2. A chemical solution or the like is sprayed.

  If the cock lever 56 is operated to the second operation position D2 when the forward traveling of the self-propelled carriage 2 is started, spraying is performed both during forward travel and during reverse travel.

  Further, the cock lever 56 is an operation position that does not protrude into the displacement passage 58 of the traveling direction switching operation lever 36, and is a third operation position D3 different from the second operation position D2, for example, FIG. The operation of the advancing direction switching operation lever 36 can be performed by setting the position to be displaceable to the operation position D3 that faces right as viewed in FIG. Regardless, spraying from the spray nozzle 4 can be stopped.

  On the contrary, if the pipeline 57 is opened at the first operation position D1 and the pipeline 57 is closed at the second operation position D2, the self-propelled carriage 2 It is also possible to apply the spray only when the vehicle is moving forward.

  If the operation position of the cock lever 56 is changed by the contact of the traveling direction switching operation lever 36 directly with the cock lever 56 as in the present embodiment, the traveling direction switching operation is performed. The mechanical interlocking system from the lever 36 to the cock lever 56 has a very simple configuration, and the displacement operation is transmitted reliably, which is preferable.

  As shown in FIG. 1, the hose reel 3 rotates freely when the self-propelled carriage 2 travels in the forward direction F by the action of a one-way clutch 59, and the hose 6 moves according to the progress of the self-propelled carriage 2. Is paid out. On the other hand, when the self-propelled carriage 2 travels in the reverse direction R, the hose reel 3 is driven by sprockets 60 and 61 and a chain 62 as transmission means via the intermediate shaft 23, and the hose 6 is Wind up. Since an appropriate type of torque limiter device (see FIG. 2) 63 is interposed between the intermediate shaft 23 and the hose reel 3, the reverse speed of the self-propelled carriage 2 and the winding of the hose 6 are arranged. The take-up speed can be synchronized, and the hose 6 can be reliably wound around the hose reel 3 without loosening.

  Further, although not shown in the drawings, the self-propelled spreader 1 is also provided with an aligned winding mechanism having a known structure so that the hose 6 can be wound around the hose reel 3 in an aligned state. .

  According to the self-propelled spreader 1 according to the present embodiment configured as described above, the automatic switching of the traveling direction of the self-propelled carriage 2 and the automatic control of the spray from the spray nozzle 4 are performed as described above. This is performed by the displacement of the movable bumper 39 due to the contact with the obstacle T and the displacement of the traveling direction switching operation lever 36 and the cock lever 56 mechanically linked thereto. That is, since no automatic or automatic switching of the traveling direction of the self-propelled carriage 2 or control of spraying from the spray nozzle 4 is required, it is resistant to rainwater and shock, and is broken. It is difficult and inexpensive.

  Further, since the hydraulic motor 22 driven by the internal combustion engine 34 is adopted as a travel drive source of the self-propelled carriage 2, it is compared with a travel drive source using an electric motor that uses a battery as a power source. In addition to being able to operate continuously for a long time, the running torque is increased, which is preferable.

  Note that a hydrostatic drive transmission (HST) can be used as a travel drive source of the self-propelled carriage 2.

It is a left view of the self-propelled spreader concerning one embodiment of the present invention. It is a top view which shows the driving system of the self-propelled carriage of FIG. It is an III arrow enlarged view of FIG.

Explanation of symbols

2 Self-propelled carriage 4 Spray nozzle 36 Travel direction switching operation member (travel direction switching operation lever)
39 Contact displacement member 47 Biasing means (Tension spring for biasing operation lever)
48 Locking part (recess locking lever for forward movement)
50 Release action member (release action plate)
52 Interlocking connection member (Boden cable)
56 Spray control operation member (cock lever)
58 Displacement passage A1 Non-contact position A2 Contact position B1 Forward operation position B2 Reverse operation position D1 First operation position D2 Second operation position F Forward direction T Obstacle

Claims (5)

  Advancing direction switching operation member (36) that is displaceable between the forward operation position (B1) and the reverse operation position (B2), and non-contact by contacting the obstacle (T) when traveling in the forward direction (F) A contact displacement member (39) that is displaced from the hour position (A1) to the contact position (A2), and the contact position of the contact displacement member (39) from the non-contact position (A1). The traveling direction switching operation member (36) is automatically displaced from the forward operation position (B1) to the backward operation position (B2) mechanically interlocking with the displacement operation to the hour position (A2). The self-propelled carriage in which the contact displacement member (39) and the traveling direction switching operation member (36) are operatively linked to each other.   The urging means (47) for constantly urging the advancing direction switching operation member (36) toward the reverse operation position (B2), and the advancing direction switching against the urging force of the urging means (47). A locking portion (48) for locking the operation member (36) at the forward operation position (B1), and the forward operation position (B1) of the traveling direction switching operation member (36) by the locking portion (48). The release action member (50) for releasing the locked state to the mechanical position and the displacement operation of the contact displacement member (39) from the non-contact position (A1) to the contact position (A2). The self-propelled carriage according to claim 1, further comprising an interlocking connection member (52) that drives the release action member (50) in conjunction with the vehicle.   The self-propelled carriage (2) according to claim 1 or 2, a spray nozzle (4) attached to the self-propelled carriage (2), and a spray for controlling the spray from the spray nozzle (4). A control operation member (56), and mechanically interlocked with the displacement operation of the contact displacement member (39) from the non-contact position (A1) to the contact position (A2). The contact displacement member (39) and the spray control operation member (56) are arranged so that the spray control operation member (56) is automatically displaced from the first operation position (D1) to the second operation position (D2). 56) are operatively linked to each other.   The spray control operation member (56) is automatically operated in conjunction with the displacement operation of the forward direction switching operation member (36) from the forward operation position (B1) to the reverse operation position (B2). The traveling direction switching operation member (36) and the spray control operation member (56) are operatively linked to each other so as to be displaced from one operation position (D1) to the second operation position (D2). The self-propelled spreader according to claim 3.   The spray control operation member (56) protrudes into the displacement passage (58) of the traveling direction switching operation member (36), and the first operation position (D1) is separated from the displacement passage (58). The spray control operation member can be displaced to a second operation position (D2), and the traveling direction switching operation member (36) is displaced from the forward operation position (B1) to the reverse operation position (B2). The self-propelled spreader according to claim 4, wherein the spray control operating member (56) is displaced to the second operating position (D2) by pushing out (56) from the displacement passage (58). .

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