JPS6221461Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a handle device in the control section of a walk-behind mobile work vehicle.

(b) Prior Art A walk-behind mobile work vehicle (for example, a walk-behind combine harvester) has a handle protruding rearward from a control section at the rear of the self-propelled vehicle body, and an operator who follows the control section while walking. The vehicle is configured to operate the vehicle body by operating various control devices in the steering section while gripping the steering wheel.

(c) Problems to be solved by the invention Therefore, in walk-behind mobile work vehicles,
When the vehicle is moving in reverse, the operator must operate the vehicle while walking backwards with his back to the direction of the vehicle, so he may be distracted by operating the control device and may be slow to notice that there is an obstacle behind him. The operator may become caught between an obstacle and the vehicle body, and be forced into a dangerous situation as the vehicle continues to move backwards. However, the vehicle body has the problem of colliding strongly with obstacles while going backwards, resulting in damage and accidents.Furthermore, the handlebars extend rearward from the control section and the front length of the vehicle body is longer, making it difficult to move. When a work vehicle is loaded onto a truck or the like and transported, it occupies a large space and has the disadvantage of being uneconomical in terms of transportation costs.

Therefore, the present invention was implemented with the purpose of providing a handle device with a simple structure that makes it possible to avoid the above-mentioned dangers when reversing the vehicle and to reduce the space occupied during transportation at the same time. It is something to do.

(d) Means for Solving the Problems In order to achieve the above object, the present invention provides a rotation fulcrum shaft 8 at the intermediate part of the leg of the handle 3 extending rearward from the control section 2 at the rear of the vehicle body 1. and regulation pins 9 are fixed in a parallel state at predetermined intervals, and the rotation fulcrum shaft 8 is fitted into a long hole 10 in the longitudinal direction opened in the control part forming member, and the regulation pin 9 is inserted into the long hole 1 in the longitudinal direction.
0 is engaged with a circular arc-shaped long hole 11 opened in the control part forming member with the axis of the rotation fulcrum shaft 10 located at the front end thereof, and furthermore, the lower hole end of the circular arc-shaped long hole 10 is connected to the A locking groove located on the extension line of the hole 10 and extending toward the elongated hole 10 is provided in succession, and a resilient spring 12 is provided between the handle 3 and the control section forming member to bias the handle in the extending direction. is interposed therebetween, and tension springs 19, 19 connected to side clutch levers 4, 4 are connected to other parts of the handle 3, making it a handle device for a walk-behind mobile work vehicle.

(E) Function Therefore, in the handle 3 of a walk-behind mobile work vehicle to which the device of the present invention is applied, the rotation fulcrum shaft 8 is normally located at the rear end of the elongated hole 10 and the regulating pin 9 is locked. By being pressed in the extending direction by the elastic spring 12 while positioned in the groove, the side clutch levers 4, 4 are maintained and fixed in a predetermined rearward protruding state, and even when the handle is fixed, the side clutch levers 4, 4 can be manually operated individually. This allows you to rotate the vehicle body.

If the operator gets caught between an obstacle at the rear when moving the vehicle backwards, an external force is applied to the handlebar 3 that overcomes the spring force of the compression spring 12, so that the handlebar 3 After being pushed and moved, the regulating pin 9 comes out of the locking groove and moves to the arc-shaped elongated hole 11, and the entire handle rotates downward by an external force about the rotation fulcrum shaft 8 that has moved to the front end of the elongated hole 10. While expanding the space in which the operator is trapped, the side clutch levers 4, 4 are simultaneously actuated via the tension springs 19, 19 to cut off the travel transmission and bring the vehicle into a braking state, stopping and fixing the vehicle body. Even if the operator runs away while the vehicle is still moving backwards, the vehicle will automatically stop moving backwards when the handle touches an obstacle, and the vehicle will be braked and fixed at the stopped position, ensuring no damage to the vehicle. This will be prevented.

Furthermore, if the handlebar 3 is consciously pushed in and rotated downward while the vehicle is moving forward or backward, the side clutch levers 4, 4 will be activated simultaneously without any time difference, and the vehicle will come to an instant stop without swinging left or right. In addition, when loading the work vehicle onto a truck or the like for transport, the handle 3 can be rotated downward to shorten the overall length of the vehicle, occupying less space, and at the same time secure the vehicle body for economical and safe loading. It can be transported.

(f) Examples Next, embodiments of the present invention will be explained with reference to the attached drawings.

The drawings illustrate the case where the walking-type mobile work vehicle is a walking-controlled combine harvester, and FIG. 1 is an overall side view of the combine harvester to which the present invention is applied;
FIG. 2 is an enlarged cross-sectional view of the main part showing the detailed structure of the handle, and FIG. 3 is a partially cutaway plan view of the left half of the handle.

A combine harvester A shown in FIG. 1 is provided with a control section 2 at the rear end of a vehicle body 1 that is self-propelled by a crawler-type traveling section 5, and an operator operates while walking behind the control section 2. It is configured.

The control unit 2 is equipped with various operating devices such as left and right side clutch levers 4, 4 and a gear shift lever (not shown), and further has a handle 3 protruding rearward to be grasped by an operator.

The handle 3 is formed by bending a pipe material 6 so that it falls sideways in a U-shape in a plan view, and forming rotation fixing devices 7 on the left and right legs of the pipe material 6.
The rotary fixing device 7 is installed so as to be rotatably fixed in the vertical direction on the member forming the control section 2, and the rotary fixing device 7 has the following specific structure.

A pivot shaft 8 in the horizontal and lateral direction is fixed at the middle part of the three legs of the handle, and the shaft 8 is inserted into a long hole 10 in the longitudinal direction formed in the member forming the control section so that the shaft 8 can be moved and rotated in the longitudinal direction. At the same time, a regulation pin 9 parallel to the rotation fulcrum shaft 8 is fixed to the handle leg at a portion that is a predetermined distance from the rotation fulcrum shaft 8 toward the leg end. 9 is inserted into an arc-shaped elongated hole 11 formed in the control section forming member.

The arcuate elongated hole 11 is formed as an arcuate hole centered on the axis of the coaxial shaft 8 when the rotation fulcrum shaft 8 is located at the front end of the elongated hole 10, and the lower hole end is It has a structure in which locking grooves that are located on an extension line of the elongated hole 10 and extend in a direction approaching the elongated hole 10 are arranged in series.

Further, an arcuate guide 13 concentric with the arcuate elongated hole 11 is fixed to a portion of the steering portion forming member that corresponds to the handle leg end, and an arcuate guide 13 concentric with the arcuate long hole 11 is fixed to the inner arcuate surface of the arcuate guide. The outer spring ends of the internally installed compression springs 12 are brought into sliding contact.

Therefore, under normal conditions, the rotation fulcrum shaft 8
is located at the rear end of the elongated hole 10, and the regulating pin 9 engages with the locking groove at the lower end of the arcuate elongated hole 11, so that the handle 3 is moved backward (second direction) by the elastic spring 12.
The handle 3 is pressed in the opposite direction of arrow A in the figure) and maintained in a rearward protruding position.
When a forward external force F greater than a set value is applied to , the rotation fulcrum shaft 8 moves to the front end of the elongated hole 10 and the regulation pin 9 moves from the locking groove to the arcuate elongated hole 11, and the handle 3 This means that it can rotate downward (in the direction of arrow B in FIG. 2) about the rotation fulcrum shaft 8.

A handle 3 that can be rotated as described above is provided.
One end of the tension springs 19, 19 is hooked at the appropriate position, and the other end of each tension spring 19, 19 is connected to the lever arm 18, 18 fixed to the side clutch lever 4, 4, and the handle is fixed. When the clutch 3 rotates downward, its movement causes the side clutch arms 4, 4 to be operated in the travel stop braking direction, so that they are interlocked and connected.

As is well known, each side clutch lever 4 is rotatably installed on a shaft support 14 and is configured to be actuated individually by manual operation. Operation unit 16 connected via spring 17
The system is designed to cut off transmission to a side clutch built into the travel transmission system and operate the brake in a braking state.

When the traveling type combine harvester according to the embodiment is in use, the handle 3 is in the rearward protruding position shown in solid lines in FIG. That is, in a state where the regulating pin 9 is engaged with the locking groove at the lower end of the arc-shaped elongated hole 11, the handle 3 is pressed rearward by the elastic spring 12 and is regulated so that it cannot rotate in the vertical direction.

Therefore, the operator can operate the combine harvester while grasping the fixed handle 3, and when the operator manually operates the side clutch levers 4, 4 separately to turn the vehicle body during operation. Since the movement of the side clutch lever alone is permitted by the tension spring 19, it can be rotated without any trouble even when the handle is fixed.

Next, if there is an obstacle such as a fence or side wall behind the operator when reversing the vehicle, if the operator notices it too late or is reversing too fast, the operator may accidentally fall between the vehicle and the obstacle. In such a case, an external force F that exceeds the set value is always applied to the handle 3, and by applying an external force F that exceeds the set value, the handle 3 is pushed forward (in the direction of arrow A), and the regulating pin 9 moves from the locking groove to the arc-shaped elongated hole 1.
The handle 3 is rotated downward about the rotation fulcrum shaft 8 in the direction of arrow B in FIG. The side clutch levers 4, 4 are actuated to cut off the transmission and enter a braking state, thereby stopping and fixing the vehicle body. Therefore, even if the operator accidentally becomes caught between an obstacle when the vehicle is moving backwards, the handle 3 will rotate downward to widen the pinching space and prevent further movement of the vehicle. Since it is possible to stop and securely stop the vehicle from moving backwards, accidents resulting in injury or death due to strong pressure on the operator can be avoided, and even if the operator runs away while the vehicle is still moving backwards, the steering wheel will come into contact with an obstacle, ensuring that Since the vehicle body is stopped and fixed, damage to the vehicle body itself is also prevented.

Furthermore, whether the vehicle is moving forward or backward, when you have to stop the vehicle suddenly,
By consciously applying the external force F to the handlebar 3, both side clutch levers operate simultaneously and without variation, making it possible to instantly stop and fix the vehicle body.Furthermore, the combine harvester can be loaded onto a truck or the like for transportation. In such cases, by rotating the handle 3, the length of the vehicle body can be shortened, occupying a small space, and the vehicle body can be braked and fixed for economical and safe transportation.

(g) Effects of the invention As explained above, the present invention provides a walk-behind mobile work vehicle configured with a handle 3 extending rearward from the control section 2 at the rear of the vehicle body. A fulcrum shaft 8 and a regulating pin 9 are attached to the part.
The fulcrum shaft 8 is fitted into an elongated hole 10 in the longitudinal direction formed in the control section forming member so as to be able to move and rotate in the longitudinal direction, and the regulating pin 9 is fixed in a parallel state. The elongated hole 10 is engaged with an arc-shaped elongated hole 11 formed in the control part forming member with the axis of the rotation fulcrum shaft 8 located at the front end of the elongated hole 10 as the center, and the lower hole end of the arc-shaped elongated hole 11 is Said long hole 1
A locking groove located on an extension line of 0 and extending toward the elongated hole 10 is provided in succession, and an elastic spring 12 is provided between the handle and the control part forming member to elastically bias the handle 3 in the extending direction. This handle device has tension springs 19, 19 interposed therebetween and connected to the side clutch levers 4, 4 at other parts of the handle 3, so that it has the following advantages.

When the operator is caught between the control section and an obstacle when the vehicle is moving backwards, or when the vehicle collides with an obstacle without the operator present, the external force applied is The handle 3 rotates downward and the side clutch levers 4, 4 are operated to automatically stop and fix the vehicle body to avoid the vehicle body from colliding strongly with an obstacle when the operator is strongly pinched. However, under normal conditions, the vehicle body rotation operation can be performed without difficulty by manually operating the side clutch levers 4, 4 separately.

When the side clutch levers 4, 4 are operated by downward rotation of the handle 3, both the side clutch levers 4, 4 are operated simultaneously without any time difference, so it is necessary to stop the vehicle suddenly while the vehicle is moving forward or backward. If this does not occur, it is safe to turn the steering wheel three times to instantly stop the vehicle without causing it to swing left or right.

When transporting a mobile work vehicle by loading it onto a truck, etc., press the handle 3 at the loading position.
By simply rotating the lever downward, the length of the vehicle can be shortened without the troublesome operation of tightening or loosening fasteners.At the same time, the vehicle body is fixed in the loading position, making it easier to handle and occupy less space. It can be made smaller, which is advantageous in terms of transportation costs, and the cargo can be securely secured, improving transportation safety.

Since it is constituted only by the connection between the handle 3 and the side clutch levers 4, 4, which are necessary for the control section, and no special members are required, the overall structure is extremely simple and is advantageous in practice.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a mobile work vehicle (combine harvester) to which the device of the present invention is applied, Fig. 2 is an enlarged sectional view of the main part showing the detailed structure of the handle part, and Fig. 3 is an enlarged view of the left half of the handle part. FIG. 2 is a partially cutaway plan view. 1...Vehicle body, 2...Control unit, 3...Handle,
4...Side clutch lever, 8...Rotation fulcrum shaft, 9...Restriction pin, 10...Long hole, 11...Circular long hole, 12...Elastic spring, 19...Tension spring.

Claims (1)

[Scope of utility model registration request] From the control section 2 at the rear of the vehicle body 1 to the rear handle 3
In the walk-behind mobile work vehicle configured by extending the handle 3, a rotation fulcrum shaft 8 and a regulating pin 9 are fixed in parallel to the middle part of the leg of the handle 3, and the fulcrum shaft 8
is a long hole 1 in the longitudinal direction opened in the control part forming member
The regulating pin 9 is inserted into the long hole 10 so as to be able to move back and forth and rotate. 11, and furthermore, a locking groove located on the extension line of the long hole 10 and extending toward the long hole 10 is connected to the lower hole end of the arcuate long hole 11, and the handle 3 and the steering wheel are connected to each other. A resilient spring 1 for resiliently biasing the handle 3 in the extending direction is provided between the part forming member and the
2, and tension springs 19, 19 connected to the side clutch levers 4, 4 are installed in other parts of the handle 3.
A handle device for a walk-behind mobile work vehicle that connects the