JP3010377U - Back traveling device in cultivator - Google Patents

Abstract

(57) [Summary] [Purpose] When performing back travel (reverse travel) of the cultivator, the operating handle must be in the low position to prevent the back gear from entering and maintain safe operability during back travel. To do. [Structure] An operation handle A is provided so as to be able to move up and down in a cultivator. Only when the operation handle A is lowered,
Release the stopper B to start traveling backward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention has a structure in which the back gear cannot be inserted unless the operating handle is set to the low position when the vehicle is traveling in the reverse direction, thereby ensuring safe operability when traveling in the reverse direction. Regarding the device.

[0002]

[Prior art]

 To operate the cultivator (equipped with an engine) by starting the engine and moving the cultivator forward, hold the clutch lever provided on the handshake part of the operation handle located at the rear of the cultivator, engage the clutch, and then press the clutch lever. When the knock provided on the is pushed, the clutch is fixed and the tiller is in continuous operation. To disengage the clutch, hold the clutch lever and extend your finger to the knock and operate the knock to release the clutch lever. When you release the clutch lever, the clutch will automatically disengage. When driving such a cultivator backwards (backward) with power, set the speed change mechanism of the cultivator to the backward traveling state and squeeze the clutch lever to open the clutch and the rotors and drive of the cultivator. Since the wheels rotate in reverse, the cultivator runs backwards.

[0003] During this work, if a danger occurs due to the back travel of the tiller, the clutch is released when the clutch lever is released. At the same time, turn off the engine at a position near the handshake part of the operating handle of the tiller, a switch for turning the engine on and off, and at a position appropriately located on the operating handle. There are buttons for it.

Further, when the cultivator is in a back-running state with power, and when a dangerous state is reached, the hand (fingers) is extended or the person who is driving the cultivator comes into contact with the body of the engine. The power is cut off and the engine is stopped. In addition, a lever handle of the back device is provided in a part other than the handshake part of the operating handle of the cultivator, and the lever handle acts on the back device, and the cultivator begins to run backwards and the speed gradually decreases. There are also such things. The danger was not dealt with in the operating handle of the tiller.

Further, since the airframe of the cultivator leans forward due to the reaction force Q generated when the cultivator travels backward, a sensor has been developed to detect this tilt and the engine has been developed. There is. At present, in order to reduce the danger due to the reaction force Q generated when the cultivator moves backward with power, the center of gravity (gravitational force) of the current rotary cultivator, whether large, medium or small, is extremely reduced. It is commercially available as the rear part.

Further, there is a cultivator in which a main clutch is interlocked (disengaged) when a hand clutch provided near the handle grip is engaged (disengaged). In addition, there is one that prevents the danger of back running by providing a shift restricting part for back running on the operation part of the shift clutch. In addition, there is a serious defect that makes it extremely difficult for workers to perform operations in an emergency.

[0007]

[Problems to be solved by the device]

 When retreating due to the power of the tiller, the tiller blade may be rotating immediately in front of the operator.If the operator slips or falls, stagger the body with the tiller blade or the like. Damage, and when it is pressed against standing trees, stone walls, banks, and other obstacles by a cultivator, or when the edge of the cultivated land is a steep slope or the bottom of a valley, it falls along with the cultivator in the valley and May die and many fatal accidents occur. Therefore, although the above-mentioned improvements and developments have been made, in the case of back running, as shown in FIG. 31, the driving wheel may be at a low speed, and the reaction force Q is large. , The operation handle of the cultivator is lifted and becomes vertical. When such a physical instability and danger are felt, the worker desperately tries to lower the operation handle and has the instinct to grab the handshake. For this reason, it is actually extremely difficult to disengage the clutch and turn off the engine switch, and even today, there are many accidents. There is already a wonderful development that made it possible to detect and stop by a sensor by focusing on such accidents, but the cultivator always has no vibration and the work site is uneven. However, the work site is not flat, as there are some slopes. It can be said that there is a great risk that the sensor will not function when working in such a place.

[0008] Further, in order to reduce the danger due to the reaction force Q generated when the tiller travels backwards by power, the one having the center of gravity extremely rearward is dangerous when traveling backwards normally. However, it is dangerous if there are ridges or obstacles at the rear of the car while traveling backwards.In addition, the center of gravity is usually extremely rearward. Since the operator carries out the forward work by lifting, there is a problem that the worker may be tired in one day depending on the case. For this reason, the agricultural industry is demanding a vehicle that has a high degree of safety in back running as soon as possible.

[0009]

[Means for Solving the Problems]

 Therefore, the inventor, as a result of earnest and repeated studies to solve the above-mentioned problems, found that the inventor provided an operation handle capable of moving up and down in a tiller, and only when the operation handle was lowered, the stopper was released. By adopting a back traveling device for the cultivator that enters the back traveling mode, the operating handle must be set to a low position in order to carry out the back traveling (reverse traveling) of the cultivating device. The operability and safety of back running can be improved, and the above problems have been solved.

[0010]

[Action]

 First, as shown in FIG. 2 (a), the gear shift lever 9 of the cultivator is moved in a direction away from the operation handle A to enter the forward gear F, and when it is moved to the operation handle A side, the back gear R is moved. Enter and set the middle of them as neutral N. Then, when the tiller moves forward, the operation handle A is set in the range of the high position Hp with respect to the frame 2 so that the working condition of the worker becomes the best (see FIG. 3). At this time, the shift lever 9 can be placed in the forward gear F position. However, when the operation handle A remains in the high position Hp, even if the shift lever 9 is moved to the back gear R position, the contact portion 10 of the stopper B comes into contact with the operation handle A and the speed change lever 9 moves. It cannot move and cannot be put in the back gear R position (see FIG. 2 (b) and FIGS. 4 and 5).

Next, when the speed change lever 9 of the cultivator is put into the back gear R, the operation handle A is set to the low position Lp with respect to the frame 2 (see FIG. 6). Then, since the stopper B of the speed change lever 9 does not contact the operation handle A with respect to the operation handle A at the low position Lp, the speed change lever 9 can be moved to the operation handle A side, and the speed change lever 9 can be moved. Can be put in the back gear R position (see FIG. 2 (c) and FIGS. 7 and 8). That is, the operating handle A must be set to the low position Lp once when the cultivator is traveling backward, and therefore the operating grip of the operating handle A is not in the high position when traveling backward, so Can maintain a very stable and low state without being forced to stretch out, it is easy to control the cultivator at all times, prevent the danger of workers when traveling backwards, and improve the safety of workers. Can be secured.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the present invention, an engine 1 is mounted on a frame 2 as a cultivator, as shown in FIGS. 1 and 2 (a). Is longer than the engine 1, and is configured such that the engine 1 and other members can be placed or stored, and protrudes forward in the traveling direction. The drive from the engine 1 is interlocked with a drive shaft 5 located below the frame 2 via a transmission mechanism such as a pulley, a belt or a chain case. In the case of a small cultivator, the drive shaft 5 is provided with a drive wheel 6 when traveling on a road surface, and a cultivating portion provided with a plurality of cultivating blades is detachably provided when cultivating although not shown. Furthermore, in the case of a large- or medium-sized cultivator (rotary cultivator), there is an embodiment in which the drive wheel 6 and the cultivating part are independent of each other, and the cultivating part is provided at the rear part of the drive wheel 6.

The operation handle A swings upward and downward vertically from two frames where the engine 1 is mounted, and is provided so as to be freely fixed at a desired position according to the working conditions of the worker. (See Figure 1, etc.). Then, the operation handle A can be set at the most suitable position. The operating handle A is composed of a boom portion 7 and a handle portion 8, and the swinging operation of the operating handle A described above is performed by the root portion of the boom portion 7. Specifically, the boom portion 7 has a hollow tubular shape, and is formed in a substantially "V" shape when viewed from the side, and is swingable upward and downward through the bearing base 3 provided on the frame 2 and fixed by tightening. It has a flexible structure (see Fig. 1).

A handle portion 8 is attached from the tip of the boom portion 7, and the handle portion 8 has two handle rods 8a, 8a extending in an "8" shape as shown in FIG. A clutch lever 8b and a grip portion 8c are provided at the tips of the two handle rods 8a, 8a. When the clutch lever 8b is gripped [raised upward in FIG. 1 (a)], the drive wheel 6 or the tiller is driven. Further, although the operating handle A is configured with the boom portion 7 and the handle portion 8 as separate materials, the boom portion 7 and the handle portion 8 are integrally formed, which is not shown in another embodiment. Examples also exist.

In order to change the operation handle A to an appropriate angle according to the work situation of the worker, the bearing base 3 supporting the operation handle A is loosened from the fixed state to be in a free state. Then, the operating handle A is set and fixed at a desired angle with respect to the bearing base 3. The lock of the operation handle A to the bearing base 3 is provided with a screw for tightening and the like. There is also an embodiment in which the bearing base 3 is formed relatively high as shown in FIG.

Further, as another embodiment of the angle adjusting means according to the working condition of the operation handle A, as shown in FIG. 16, an arc-shaped angle adjusting plate 14 is provided between the operation handle A and the frame 2. As shown in FIGS. 17 (a) and 18, the angle adjusting plate 14 is provided with angle adjusting holes 14a, 14a, ... In a circular arc direction at predetermined intervals. Further, the positioning pin 15 is urged toward the angle adjusting plate 14 by the elastic body 16 such as a coil spring so that it can be expanded and contracted toward the operation handle A side, and the tip of the positioning pin 15 is an angle adjusting hole of the angle adjusting plate 14. It has a structure to be inserted into 14a, 14a, ....

The positioning pin 15 is pulled by the wire 17 so that the grip portion 8c of the operation handle A can be expanded and contracted. By pulling the wire 17, the positioning pin 15 can be moved. The tip of 15 is pulled out from the angle adjusting holes 14a, 14a, ..., and the operation handle A is vertically swingable. Then, when the operation handle A is set to a desired angle in that state and the wire 17 is loosened, the positioning pin 15 urged by the elastic body 16 becomes the angle adjusting holes 14a, 14a, ... The operation handle A can be inserted and fixed at a desired angle (see FIG. 19). There is also an embodiment in which the positioning pin 15 is provided above the operation handle A as shown in the phantom line portion of FIG.

Further, there is an embodiment in which the confirmation projection 18 is provided on the side surface of the angle adjusting plate 14. 17B is a cross-sectional view taken along the line X-X of FIG. 17A. As shown in FIG. 17B, the confirmation projection 18 is stored in the angle adjusting plate body 14. It is housed in the portion 14b and has a structure in which the spherical head of the confirmation projection 18 is elastically projected by the elastic body 19. As described above, the confirmation protrusion 18 elastically protrudes outward of the angle adjusting plate 14 at all times, and the confirmation protrusion 18 is set in the vicinity of the normally used angle of the operation handle A, so that the confirmation protrusion 18 is formed. It is possible to easily convey the feeling of the elastic contact between the body 18 and the operating handle A to the operator, and to set the operating handle A at the position where it is normally used.

The frame 2 is provided with a speed change lever 9, and the speed change lever 9 is for performing forward and reverse movements of the cultivator, and conversion of speed and the like, and an operator appropriately operates the speed change lever 9. Then, the vehicle can be moved forward, backward, or at a desired speed. Further, in the present proposal, there are two types of forward, reverse and neutral operations by the speed change lever 9, one of which is to move the speed change lever 9 to the operation handle A side as shown in FIG. 2 (a). By moving (rotating), the vehicle enters the back gear R and travels backward, and by moving the speed change lever 9 away from the operation handle A, it enters the forward gear F. Therefore, the intermediate position thereof is set to the neutral N. I am trying.

On the other hand, contrary to the above, the forward gear F is entered by moving the speed change lever 9 to the operation handle A side, and the back gear is moved by separating the speed change lever 9 from the operation handle A. It goes into R, and the middle is called neutral N. This is shown in the embodiment of Figures 13-15. As shown in FIG. 10, the shift lever 9 is provided with a stopper B, and when the stopper B is at the high position Hp of the operation handle A, the shift lever 9 is actuated by the action of the stopper B to move to the back gear R. The shift lever 9 enters the back gear R only when the operation handle A is in the low position Lp without entering. The positions of the back gear R, the neutral N, and the forward gear F of the speed change lever 9 are indicated by the letters R, N, and F in each drawing, and the state thereof is specifically shown.

In addition, when the gear shift lever 9 is moved (rotated), the base portion of the gear shift lever 9 does not move in a position, and the gear shift lever 9 is used (see FIGS. 2, 11, 14, and 21). There is a groove sliding type (see FIGS. 29, 30 etc.) in which the position of the base of -9 moves. The groove sliding type is specifically provided with a gear shift position confirmation plate 20, and the vicinity of the base of the gear shift lever 9 slides in the gear shift position confirmation groove 20a of the gear shift position confirmation plate 20.

Next, as an embodiment of the stopper B, a type in which the shift lever 9 is moved to the operation handle A side to enter the back gear R position will be described. The stopper B is shown in FIG. As shown in (c) and FIG. 10, etc., the contact portion 10 that has a substantially L-shaped cross section and that contacts the boom portion 7 is formed in a substantially vertical shape, and the contact portion 10 of the stopper B is the operation handle A. The gear shift lever 9 cannot move to the boom section 7 side any more in a state where it can contact the boom section 7 (see FIGS. 3 and 5). As a result, as long as the contact portion 10 of the stopper B is in contact with the operation handle A, the speed change lever 9 cannot move to the operation handle A side. Therefore, the speed change lever 9 is inadvertently moved to the back gear. It has a structure that makes it impossible to put it in the R position.

As shown in FIGS. 5 and 10, the stopper B is composed of the abutting portion 10 and the connecting portion 11, and specifically, the abutting portion 10 with respect to the horizontal connecting portion 11. Is formed in a vertical shape, and as shown in FIGS. 11, 12 (a), (b), etc., there is an embodiment in which the contact portion 10 is formed in a hanging shape from the connecting portion 11. . Further, one end of the connecting portion 11 is fixed to an appropriate position of the speed change lever 9, and only when the operation handle A thereof is set to the high position Hp, as shown in FIGS. The abutting portion 10 comes into contact with an appropriate portion of the boom portion 7 of the operation handle A. Further, when the operation handle A is set to the low position Lp, as shown in FIGS. 6 to 8, the contact portion 10 of the stopper B does not contact the boom portion 7, that is, the speed change lever 9 enters the back gear R. Is something that can be done.

The state in which the operating handle A is in the high position Hp means that the operating handle is set in the high position H p at the position of the operating handle A which is the most suitable angle when the operator normally moves the tiller forward. The setting range of A is relatively wide (see the phantom line in FIG. 1). Further, the state in which the operation handle A is in the low position Lp means that the operator can operate even when the cultivator leans forward due to the reaction force Q (see FIG. 31) when the cultivator is traveling backward. This means an angle at which the handle A can be safely operated and controlled. Specifically, as shown by the solid line portion in FIG. 1, it is preferable that the grip portion 8c of the operation handle A is at the lowest position. However, the low position Lp state is not necessarily limited to a specific position as described above, and a certain allowable range may exist depending on various conditions such as the height of the worker. The low position Lp state and the high position Hp state of the operation handle A as described above are indicated by the letters Hp and Lp on the operation handle A in each drawing to specifically describe the high position Hp and the low position Lp. It shows the state.

Next, as another embodiment of the stopper B, it is adapted to a type in which the back gear R is entered by moving the speed change lever 9 in a direction away from the operation handle A. As shown in FIGS. 13 to 15, a bulging bent portion 12 is formed between the connecting portion 11 and the contact portion 10 so as to expand outward. The bulging bent portion 12 surrounds the boom portion 7 of the operation handle A and allows the boom portion 7 to be loosely inserted inside. Specifically, the bulging bent portion 12 may be formed as an inverted L-shaped bulging bent portion upward from the end portion of the connecting portion 11, or may be formed in an arc shape. Then, when the speed change lever 9 is put in the back gear R position, the speed change lever 9 is operated so as to be separated from the operation handle A. At this time, the bulging bent portion 12 of the operation handle A in the low position Lp state is operated. The transmission lever 9 can be put in the back gear R so as to surround the boom portion 7 (see FIGS. 15A to 15C). Further, the stopper B is often formed of a metal strip plate as shown in FIG.

In both the type in which the speed change lever 9 comes close to the operation handle A side to enter the back gear R position and the type in which the speed change lever 9 moves away from the operation handle A side and the back gear R enters. When the operation handle A is in the high position Hp, the contact portion 10 of the stopper B contacts the boom portion 7 and the back gear R does not enter, and when the operation handle A is in the low position Lp, the boom portion 7 is stopped. The back gear R comes into contact without the contact portion 10 of B contacting. 20 (a) and 20 (b) show the operating state of the embodiment type shown in FIG. 16, and the stopper B is formed by bending a metal rod appropriately. In the stopper B shown in FIG. 20, a bending portion 13 is formed between the connecting portion 11 and the abutting portion 10, and the operation handle A is housed in the bending portion 13 so that the shift lever 9 can be moved. You can

There is also an embodiment in which the stopper B is provided on the boom portion 7 of the operation handle A. In this embodiment, as shown in FIGS. 23 and 24, the contact portion 10 is provided on the side surface of the boom portion 7. Alternatively, the structure is provided so as to hang downward, and when the boom portion 7 is at the high position Hp, the speed change lever 9 contacts the contact portion 10 and does not enter the back gear R position.

Next, in the stopper B, as shown in FIG. 21, a downward inclined bent portion 10a is formed below the contact portion 10, and as shown in FIGS. 22 (a) and 22 (b), When the operation handle A moves from the low position Lp to the high position Hp, the operation handle A comes into contact with the slanted bent portion 10a and the shift lever 9 can be automatically set to the neutral position. There are also things to do. That is, by moving the operating handle A from the low position Lp to the high position Hp, the speed change lever 9 enters the neutral N position to ensure safety.

Further, the inclined bent portion 10a can be formed on a stopper B of the type shown in FIG. 14, and more specifically, as shown in the imaginary line portions of FIGS. 15 (a) and 15 (b). It is formed between the contact portion 10 and the bulging bent portion 12. Further, as shown in FIGS. 29 and 30, a stopper B having an inclined bent portion 10a is provided on the operation handle A side, and when the operation handle A moves from the low position Lp to the high position Hp, the groove There is also an embodiment in which the sliding type shift lever 9 is moved from the position of the back gear R to the position of neutral N. At this time, it is also possible to confirm the shift state of the shift lever 9 using the shift position confirmation plate 20.

Further, FIGS. 26 to 28 show an embodiment in which a part of the operation handle A is also used as the stopper B, and the stopper B is not provided as a separate material on the operation handle A, but a shift lever. When the operation handle A is in the high position Hp, the contact points 9 are in contact with each other, and when the operation handle A is in the low position Lp, they are in contact with each other, as shown in FIG. 28 (b). Instead, the shift lever 9 can enter the back gear R position. In FIG. 28 (c), the cross section of the operation handle A is substantially elliptical.

[0031]

[Effect of device]

 In Claim 1, the back traveling device in the cultivator is provided such that the operating handle A is provided to be able to move up and down in the cultivator, and only when the operating handle A is lowered, the stopper B is released to start the backward traveling. As a result, firstly, the back traveling (reverse traveling) of the cultivator can be handled in an extremely safe state, and secondly, the worries of workers during the back traveling can be substantially eliminated. , It is possible to cultivate with peace of mind, and thirdly, there are various effects such as the danger of work can be eliminated in advance.

The above effect will be described in detail. Normally, when the cultivator travels backward, a reaction force Q (see FIG. 31) is generated around the drive wheel 6 provided at the middle position of the cultivator. become. This is considerably large in the case of cultivated land, and the reaction force Q causes the front side of the cultivator to be downward, and the cultivator to be reversed in the direction in which the operation handle A side rises, so that the so-called cultivator can put it forward. As a result, the grip of the operating handle A momentarily moves to an extremely high position, and the worker tries to continue to hold the grip according to his quick judgment. Therefore, the worker raises his hands high and keeps his back stretched. As a result, it becomes difficult to operate the cultivator and is likely to be hit by a backward cultivator, which is extremely dangerous.

Thus, the elimination of danger in advance is realized by the present invention. That is, the speed change lever 9 can be put into the back gear R only when the operating handle A is lowered, and therefore, when the cultivator moves backward, the operating handle A is always in the low position Lp, as described above. Even when the cultivator rotates around the drive wheel 6 due to the reaction force Q generated when the cultivator travels backward, the grip of the operation handle A does not reach a high position, which is a safety factor for workers. Can be sufficiently secured. As a result, it is possible to substantially eliminate the anxiety about accidents of workers when the cultivator is traveling backwards, and it is possible to perform cultivating work with peace of mind. It goes without saying that work hazards can be eliminated in advance.

Next, in claim 2, the stopper B has an abutting portion 10, the stopper B is provided at an appropriate position of the speed change lever 9, and the abutting portion 10 has a high position Hp. By using the back traveling device in the cultivator that is in contact with only the operation handle A in the state, the structure can be simplified and the operation can be easily confirmed. That is, since the stopper B operates together with the gear shift lever 9 and the stopper B is in contact with the operation handle A at the high position Hp, the operation state can be easily visually checked, so that the operation can be performed safely. it can.

Next, in claim 3, the stopper B is provided at an appropriate position of the speed change lever 9, and a bulging bent portion 12 is formed in the stopper B, and the bulging bent portion 12 is at a low position. Only the operation handle A in the Lp state can enter, and the contact portion 10 is formed at the upper end of the bulging bent portion 12, and the contact portion 10 abuts only the operation handle A in the high position Hp state. By adopting a back traveling device for a cultivator, it is suitable for a type in which when the gear shift lever 9 is put into the back gear R, the operation is performed so as to be separated from the operation handle A, and the structure thereof is extremely simple. Can be

Next, in claim 4, the stopper B is formed on the side of the operating handle A, and the speed change lever 9 abuts only on the stopper B of the operating handle A in the high position Hp state. By using the back traveling device in the above, it is possible to prevent the operation of putting the speed change lever 9 into the back gear R at the high position Hp of the operation handle A, and similarly, the structure thereof can be extremely simple. In addition, the operation handle A has a merit that the mounting area of the stopper B can be secured larger than that of the speed change lever 9 and the stopper B can be easily attached.

Next, according to a fifth aspect of the present invention, the stopper B is a back traveling device in a cultivator in which an inclined bent portion 10a that is inclined downward from a position below the contact portion 10 is formed. Even if the operating handle A at the low position Lp is accidentally moved to the high position Hp while the operating handle A is traveling backward, the operational safety can be ensured. That is, even if the operating handle A is accidentally moved from the low position Lp to the high position Hp during back running, the stopper B is formed with the inclined bent portion 10a, and the operation handle A has the inclined bent portion 10a. 10a is pushed up with almost no resistance, whereby the shift lever 9 moves together and the shift lever 9 is set to the neutral N position, so that the cultivator does not run away and the worker's safety is secured. It is something that can be done.

Further, also in claim 6, the stopper B in claim 3 is a back traveling device in a cultivator in which an inclined bent portion 10a which is inclined downward from a position below the contact portion 10 is formed. By doing so, the same effect as that of the above-mentioned claim 5 can be exerted.

Next, in claim 7, the operating handle A is provided so as to be able to move up and down in the cultivator, and only the operating handle A in the high position Hp state is brought into contact with the speed change lever 9 so that the back operating is disabled. The structure can be extremely simplified by adopting the back traveling device in. That is, an appropriate portion of the operating handle A is also used as the stopper B, and the speed changing lever 9 is brought into contact with the operating handle A in the high position Hp. An extremely simple structure can be achieved without providing a stopper B as a separate material.

[Brief description of drawings]

FIG. 1 Side view of a tiller equipped with the present invention

FIG. 2 (a) is a plan view of a cultivator equipped with the present invention, and (b) and (c) are schematic cross-sectional views of essential parts showing the operating state of the present invention.

FIG. 3 is a side view of an essential part showing a state in which an operation handle is set to a high position.

FIG. 4 is a plan view of an essential part showing a state where the operation handle is set to a high position.

5 is a sectional view taken along the line TH-TH in FIG.

FIG. 6 is a side view of an essential part showing a state where the operation handle is set to a low position.

FIG. 7 is a plan view of an essential part showing a state where the operation handle is set to a low position.

8 is a sectional view taken along the line TL-TL in FIG.

9 (a) and 9 (b) are schematic cross-sectional views showing a state in which the stopper is released when the operating handle is lowered from the high position to the low position and the shift lever can be put in the position of the back gear R. Figure

FIG. 10 is a perspective view of an essential part of the present invention.

FIG. 11 is a perspective view of a shift lever, a stopper, and a main portion of an operation handle.

12A is a side view of the present invention having a stopper according to another embodiment, and FIG. 12B is a sectional view of an essential part including the operating state of FIG. 4A.

FIG. 13 is a side view of a cultivator having a stopper according to another embodiment different from FIG.

14 is a perspective view of the present invention including the stopper shown in FIG.

15 (a) and 15 (b) show that the stopper is released when the operating handle is lowered from the high position to the low position in the present invention shown in FIG. 13, and the shift lever is put in the position of the back gear R. Cross-sectional schematic diagram showing the state where

FIG. 16 is a side view of a cultivator having an operation handle lifting mechanism different from that of FIG.

17 (a) is a perspective view of a main part showing an elevating mechanism of an operation handle, and FIG. 17 (b) is a cross-sectional view taken along the line XX in FIG. 17 (a).

FIG. 18 is a cross-sectional view of essential parts showing a lifting mechanism for an operating handle.

FIG. 19 is an enlarged sectional view of an essential part showing the lifting mechanism of the operation handle.

20 (a) and 20 (b) show that the stopper is released when the operating handle is lowered from the high position to the low position in the present invention shown in FIG. Cross-sectional schematic diagram showing the state where

FIG. 21 is a perspective view of an essential part of the present invention including a stopper according to another embodiment.

22 (a) and (b) are schematic sectional views showing the operating state of the present invention in FIG.

FIG. 23 is a perspective view of an embodiment in which a stopper is provided on the operation handle side.

FIG. 24 is a cross-sectional view of the essential parts of an embodiment in which a stopper is provided on the operation handle side.

FIG. 25 is a side view of an essential part showing another embodiment of the operation handle and the bearing base.

FIG. 26 is a side view of an embodiment in which the operation handle also serves as a stopper.

FIG. 27 is a plan view of an embodiment in which the operation handle also serves as a stopper.

28 (a) and 28 (b) are schematic sectional views showing an operating state of an embodiment in which the operating handle also serves as a stopper. FIG. 28 (c) is a schematic sectional view of an embodiment in which the operating handle has a substantially oval cross section. Figure

FIG. 29 is a perspective view of a main portion of a shift lever and an operation handle provided with a shift position confirmation plate.

FIG. 30 is a conceptual diagram showing a state in which a shift lever having a shift position confirmation plate shifts from a back gear to a neutral state by a stopper.

FIG. 31 is a side view showing a conventional technique.

[Explanation of symbols]

 A ... Operation handle B ... Stopper 9 ... Gear shift lever 10 ... Abutment part 10a ... Inclined bent part 12 ... Swelled bent part Hp ... High position Lp ... Low position

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 7, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 Side view of a tiller equipped with the present invention

FIG. 2 (a) is a plan view of a cultivator equipped with the present invention, and (b) and (c) are schematic cross-sectional views of essential parts showing the operating state of the present invention.

FIG. 3 is a side view of an essential part showing a state in which an operation handle is set to a high position.

FIG. 4 is a plan view of an essential part showing a state where the operation handle is set to a high position.

5 is a cross-sectional view taken along the TH-TH arrow in FIG.

FIG. 6 is a side view of an essential part showing a state where the operation handle is set to a low position.

FIG. 7 is a plan view of an essential part showing a state where the operation handle is set to a low position.

FIG. 8 is a sectional view taken along the line TL-TL in FIG.

9A to 9C are schematic cross-sectional views showing a state in which the stopper is released when the operating handle is lowered from the high position to the low position and the shift lever can be put in the position of the back gear R. Figure

FIG. 10 is a perspective view of an essential part of the present invention.

FIG. 11 is a perspective view of a shift lever, a stopper, and a main portion of an operation handle.

12A is a side view of the present invention having a stopper according to another embodiment, and FIG. 12B is a sectional view of an essential part including the operating state of FIG. 4A.

FIG. 13 is a side view of a cultivator having a stopper according to another embodiment different from FIG.

14 is a perspective view of the present invention including the stopper shown in FIG.

15 (a) to 15 (c) show that the stopper is released when the operating handle is lowered from the high position to the low position in the present invention shown in FIG. 13 and the shift lever is put in the position of the back gear R. Cross-sectional schematic diagram showing the state where

FIG. 16 is a side view of a cultivator having an operation handle lifting mechanism different from that of FIG.

17 (a) is a perspective view of a main part showing an elevating mechanism of an operation handle, and FIG. 17 (b) is a cross-sectional view taken along the line XX in FIG. 17 (a).

FIG. 18 is a cross-sectional view of essential parts showing a lifting mechanism for an operating handle.

FIG. 19 is an enlarged sectional view of an essential part showing the lifting mechanism of the operation handle.

20 (a) to (c) show that the stopper is released when the operating handle is lowered from the high position to the low position in the present invention shown in FIG. 16 and the shift lever is put in the position of the back gear R. Cross-sectional schematic diagram showing the state where

FIG. 21 is a perspective view of an essential part of the present invention including a stopper according to another embodiment.

22 (a) and (b) are schematic sectional views showing the operating state of the present invention in FIG.

FIG. 23 is a perspective view of an embodiment in which a stopper is provided on the operation handle side.

FIG. 24 is a cross-sectional view of the essential parts of an embodiment in which a stopper is provided on the operation handle side.

FIG. 25 is a side view of an essential part showing another embodiment of the operation handle and the bearing base.

FIG. 26 is a side view of an embodiment in which the operation handle also serves as a stopper.

FIG. 27 is a plan view of an embodiment in which the operation handle also serves as a stopper.

28 (a) and 28 (b) are schematic sectional views showing an operating state of an embodiment in which the operating handle also serves as a stopper. FIG. 28 (c) is a schematic sectional view of an embodiment in which the operating handle has a substantially oval cross section. Figure

FIG. 29 is a perspective view of a main portion of a shift lever and an operation handle provided with a shift position confirmation plate.

FIG. 30 is a conceptual diagram showing a state in which a shift lever having a shift position confirmation plate shifts from a back gear to a neutral state by a stopper.

FIG. 31 is a side view showing a conventional technique.

[Explanation of Codes] A ... Operation handle B ... Stopper 9 ... Gear shift lever 10 ... Abutting portion 10a ... Inclined bent portion 12 ... Swelled bent portion Hp ... High position Lp ... Low position

Claims (7)

[Scope of utility model registration request] 1. A back traveling device for a cultivator, wherein an operating handle is provided so as to be able to move up and down in the cultivator, and only when the operating handle is lowered, a backward travel is performed by releasing a stopper. . 2. A cultivator is provided with an operating handle that can be moved up and down, and only when the operating handle is lowered, the stopper is released so that the vehicle can travel back. The stopper has an abutting portion, The back travel device for a cultivator, wherein the stopper is provided at an appropriate position of the speed change lever, and the abutting portion abuts only the operating handle in a high position. 3. A cultivator is provided with an operating handle that can be moved up and down, and only when the operating handle is lowered, the stopper is released so that the vehicle travels back. The stopper is provided at an appropriate position of the speed change lever. And a bulging bent portion is formed on the stopper, and only the operating handle in a low position can enter the bulging bent portion.
A back traveling device for a cultivator, wherein an abutting portion is formed at an upper end of the bulging bent portion, and the abutting portion abuts only an operating handle in a high position. 4. A tiller is provided with an operating handle that can be moved up and down, and only when the operating handle is lowered, the stopper can be released to allow the vehicle to run backward, and the stopper is formed on the operating handle side. A back travel device for a cultivator, wherein the speed change lever comes into contact with only a stopper of an operation handle in a high position. 5. A cultivator is provided with an operating handle that can be moved up and down, and only when the operating handle is lowered, the stopper is released so that the vehicle can travel back. The stopper has an abutting portion, Further, the stopper is provided at an appropriate position of the speed change lever, and the contact portion is in contact with only the operation handle in a high position, and the stopper has an inclined shape inclined downward from a position below the contact portion. A back traveling device for a cultivator, which is characterized by forming a bent portion. 6. A cultivator is provided with an operating handle that can be moved up and down, and only when the operating handle is lowered, the stopper is released to allow the vehicle to run backward. And a bulging bent portion is formed on the stopper, and only the operating handle in a low position can enter the bulging bent portion.
An abutting portion is formed on the upper end of the bulging bent portion, and the abutting portion abuts only on the operation handle in a high position, and the stopper is an inclined shape inclined downward from a position below the abutting portion. A back traveling device for a cultivator, which is characterized by forming a bent portion. 7. A back traveling device for a cultivator, wherein an operation handle is provided so as to be able to move up and down in the cultivator, and only the operation handle in a high position is brought into contact with the speed change lever so that the back operation cannot be performed.