JPH0211244Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pedal lock device for a vehicle such as a tractor.

Conventionally, some tractors are equipped with a pedal lock device that locks the brake pedal in the depressed position when the tractor is parked, and various lock devices have been employed. However, if a through hole is formed in the step, and the brake pedal, which is pivotally supported to the vehicle body on the lower side of the step so as to be able to swing up and down, passes through the hole and protrudes to the upper surface of the step, the lower side of the step Providing a locking device would be inconvenient to use, so it would be necessary to provide it on the top side of the step, but if it is on the top side of the step, the condition is that the amount of protrusion is small and does not obstruct the driver's feet. Become.

Therefore, the applicant of the present application has devised a locking device that protrudes only a small amount and does not obstruct the driver's feet, as disclosed in Utility Model Application No. 109783/1983. That is, as shown in FIG. 9, a lock lever 102 is rotatably attached to the upper surface of the step 101, and
01 and is configured to removably engage with a brake pedal 104 that protrudes upwardly through a through hole 103. A nut 106 is fixed to one end 105 of the lock lever 102.
A stopper bolt 107 is screwed into the stopper bolt 107 so that it can move forward and backward, and a lock nut 108 is provided to fix it in a predetermined position. However, since the distance l between the pivot portion 109 and the engagement position differs depending on the amount of depression of the brake pedal 104, it is necessary to adjust the stopper bolt 107 forward or backward each time.
It has the disadvantage of being time consuming.

Therefore, in view of the above-mentioned problems, the present invention aims to provide a pedal lock device that has a small protruding amount, does not obstruct the driver's feet, and is easy to use. ,
A through hole is formed in the step, and a pedal, which is pivotally supported below the step, passes through the through hole and is provided above the step, and is removably engaged with the pedal at the pedal depression position to prevent the pedal from returning. In a pedal lock device, the lock lever is pivotally attached to the top side of the step so as to be rotatable in the left and right direction along the plate surface of the top surface of the step between a through hole position and a position removed from the hole. It is made of a flat plate material formed in a fan shape, and a plurality of engaging parts are provided along the rotating outer periphery of the plate material to be removably engaged with the pedal at the through hole position, and each engaging part can be operated to engage. The lock lever is formed such that the distance from the center of rotation becomes gradually shorter along the direction, and a spring body is provided for biasing the lock lever to the disengaged position.

Hereinafter, an embodiment of the present invention will be described based on the drawings. FIG. 1 illustrates a case in which the invention is employed as a parking brake for a forward-reverse type tractor. In FIG. 1, a tractor body 1 has a front wheel 2 and a rear wheel 3, and the rear wheel 3 is braked by a brake device 4 mounted on both rear sides of the tractor body 1. 5 is a bonnet, and 6 is a hydraulic system, which is covered by a floor cover 8 provided between left and right rear wheel fenders 7. Numeral 9 is a driver's seat, and 10 is a steering wheel, which can be installed by being reversed back and forth between the solid line position and the imaginary line position. Reference numeral 11 denotes forward steps mounted on both sides of the center of the tractor body 1. 12 is a forward clutch pedal, and 13 is a forward brake pedal, which are pivotally supported by a pedal shaft 14 below the forward step 11 so as to be vertically swingable.
A pair of forward brake pedals 13 are arranged side by side on the left and right, and can be depressed simultaneously or independently by engaging and disengaging the connecting piece 15.
3 is interlocked and connected to the cam lever 17 of the left and right brake devices 6 via a link mechanism 16 or the like. The brake pedal 12 is a forward parking brake device 18
It can be locked in the depressed position.

Regarding this forward parking brake device 18,
FIG. 2 shows a conventional example rather than an embodiment of the present invention. That is, in FIG. 2, there is a lock lever 20 pivotally supported by a pivot 19 below the step 11, and an operating rod 2 that rotates the lock lever 20.
1, and the lock lever 20 has an engaging portion 22.
is formed, and an engagement pin 23 is formed on one side of the brake pedal 13. Then, when the operating rod 21 is pulled upward along the guide body 24, the engaging portion 22 of the lock lever 20 engages with the engaging pin 23 of the brake pedal 13 at the depressed position. It is now possible to lock.

Reference numeral 25 denotes a rearward brake pedal employing an embodiment of the present invention, which is pivotally supported by a pedal shaft 27 provided on the tractor body 1 below a rearward step 26 constituted by a part of the floor cover 8. . There are a pair of rear brake pedals 25 on the left and right, each of which is connected to the cam lever 17 of the left and right brake device 4 via a link mechanism 28 etc., and
As shown in FIGS. 3 and 4, the levers can be depressed simultaneously or independently by engaging and disengaging the connecting pieces 29.

As shown in FIGS. 3 and 4, the rearward brake pedal 25 extends upward through an elongated through hole 30 formed in the rearward step 26, and extends upwardly from the rearward step 26. It can be locked in the depressed position by a rear parking brake device 31 mounted on the top side.

That is, the rear parking brake device 31 has a lock lever 32 pivotally supported on the front side of the through hole 30, as shown in FIGS. 3 and 4. lock lever 3
2 is a flanged bolt 3 that is screwed into a nut 33
It is pivotably supported by a collar 35 fixed by a collar 4 between the through hole 30 position and a position outside of the through hole 30 along the upper plate surface of the backward step 26 so as to be rotatable in the left and right direction. The lock lever 32 is made of a flat plate material formed in a sector shape, and is provided with a plurality of engagement recesses 36 as an engagement portion that engages with the brake pedal 25 in a detachable manner along the outer circumferential edge of rotation. At the same time, the distances l ₁ and l ₂ from each engagement recess 36 to the center of rotation, that is, the bolt 34, are configured to gradually become shorter from one side, that is, along the engagement operation direction. The lock lever 32 is rotated at the depressed position of the brake pedal 25 to abut and engage the predetermined engagement recess 36 with the brake pedal 25, thereby restricting the return of the brake pedal 25. 37 is a helical spring as a spring body fitted in the collar 35, and one end is connected to the lock lever 32.
The other end is engaged with the edge of the through hole 30, respectively, and is attached in a resilient manner to rotate the lock lever 32 around the axis of the bolt 34 to a position away from the through hole 30 position. There is. Note that the lock lever 32 is biased in the disengagement direction P by the helical spring 37 between the engagement recess 36 and the bolt 34 on the rear side in the biasing direction.
The distance l ₂ between the bolt 34 and the engagement recess 36 on the front side in the urging direction is shorter than the distance l ₁ between the bolt 34 and the engagement recess 36 on the front side in the urging direction. 38 is a pedal stopper made of an elastic material.

Further, the tractor body 1 is provided with a safety frame 39 as shown in FIGS. 1, 5, and 6, and a canopy 40 for shade from the sun is provided on the upper surface of the safety frame 39. The canopy 40
As shown in FIGS. 5 and 6, the canopy body 41 is made of an opaque canopy, and the transparent window body 43 made of vinyl or the like is attached to close an opening 42 formed in the canopy body 41. The window body 4
An opaque lid body 44 covering 3 is made of magic tape 45
It is configured to be detachably attached to the peripheral edge of the opening 42 from above or below via a hook or the like.

In the above configuration, when driving forward with the driver's seat 9 and steering wheel 10 mounted at the imaginary line position,
After depressing the forward brake pedal 13, if the operating rod 21 is pulled upward, the lock lever 20 rotates upward and the engagement pin 23 engages with its engagement portion 22, so that the forward brake is activated. The pedal 13 can be held in the depressed position. In other words, the brake device 4 can brake the rear wheels 3 and prevent the vehicle from starting when the vehicle is parked.

When driving backwards with the driver's seat 9 and steering wheel 10 installed in the solid line position, the forward parking brake device 18 cannot lock the vehicle even if the rearward brake pedal 25 is depressed, so the rearward parking brake device 31 cannot be locked. use. That is, the forward and rearward brake pedals 13 and 25 are interlocked with each other, but there are link mechanisms 16 and 18 between them, and since there is play and backlash in the links, the rearward brake pedals are interlocked with each other. Even when the pedal 25 is depressed, the forward brake pedal 1
3 cannot be rotated to a lockable position and cannot be locked with the forward parking brake device 18.
Therefore, the rear parking brake device 31 is used. In this case, the lock lever 32 is at the position shown by the imaginary line in FIG. When the rearward brake pedal 25 is slightly returned, the brake pedal 25 abuts and engages with the optimal engagement recess 36 located above the through hole 30, and the return is regulated and the brake pedal 25 is locked in the depressed state.

To release the brake pedal, press the rearward brake pedal 25 further, and the engagement recess 36 and the brake pedal 2
The engagement of the brake pedal 5 is released, the elastic force of the spring 37 automatically rotates the brake pedal in the direction of the arrow P, and the brake pedal 2 is returned to the position shown by the imaginary line in FIG.
5. Can be returned to operating condition.

Furthermore, when the engagement recesses 36 and the brake pedal 25 are engaged, the distances between each engagement recess 36 and the bolt 34 at the center of rotation are formed to be different, so there is a difference in the amount of depression of the brake pedal 25. However, it is only necessary to select and engage the engagement recess 36 located at the optimum distance, and there is no need to adjust the bolt 107 as in the structure shown in FIG. 9, and the operation is easy and user-friendly. Good. Also bolt 107
Since the bolts, nuts 106, etc. are not required, the structure can be simplified, manufacturing can be facilitated, and manufacturing costs can be reduced. Furthermore, in this embodiment, since a canopy 40 having a transparent window body 43 is provided, working machines etc. in high places can be easily seen, which is very convenient. It also has the advantage of being able to demonstrate

As shown in FIG. 7, the structure of the canopy 40 is that a lid body 44 is swingably held on one side by cutting three sides of the canopy body 41, and a window body 43 is opened by closing the opening 42. It shows what is provided,
There is no risk of losing the lid body 44. In addition, as shown in FIG.
7 may be used to lock onto the safety frame 39 side.

As described in detail in the above embodiments, in the present invention, a lock lever is pivotally attached to the top side of the step so that it can freely rotate in the left and right direction along the plate surface of the top surface of the step between the through hole position and a position removed from the through hole position. , the lock lever is made of a flat plate material formed in a fan shape, and a plurality of engaging parts are provided along the rotating outer periphery of the lock lever to be removably engaged with the pedal at the through hole position, and each engaging part is The lock lever is formed so that the distance from the rotation center becomes gradually shorter along the engagement operation direction, and is provided with a spring body that biases the lock lever to the disengaged position, and is a fan-shaped flat plate member. It has a simple structure in which a lock lever is pivotally connected, and the amount of protrusion from the top surface of the step is small, making it compact and does not obstruct the driver's feet.
Furthermore, all you have to do is rotate the lock lever, select the optimal position of the engagement part, and engage the pedal, and when you want to release the brake pedal, press the brake pedal further and the spring body will automatically release the lock lever. Therefore, it has the advantage of being easy to operate and convenient to use.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tractor to which an embodiment of the present invention is applied, Fig. 2 is a side view of a forward brake pedal section as an example of a conventional example, and Fig. 3 is a side view of a tractor to which an embodiment of the present invention is applied. 4 is a cross-sectional side view of the rear brake pedal portion, FIG. 5 is a cross-sectional side view of the rearward brake pedal portion, FIG. 5 is a view taken from FIG. FIG. 8 is a sectional view showing another structure of the canopy, and FIG. 9 is a sectional plan view of the main part of a pedal lock device as a prior art. 11...Forward step, 13...Forward brake pedal, 18...Forward parking brake device,
25... Rearward brake pedal, 26... Rearward step, 30... Through hole, 31... Rearward parking brake device, 32... Lock lever, 36... Engagement recess, 37... Spiral winding Spring.

Claims (1)

[Scope of utility model registration request] A through hole is formed in the step, and a pedal, which is pivotally supported below the step, passes through the through hole and is provided above the step, and is removably engaged with the pedal at the pedal depression position to prevent the pedal from returning. In a pedal lock device, the lock lever is pivotally attached to the top side of the step so as to be rotatable in the left and right direction along the plate surface of the top surface of the step between a through hole position and a position removed from the hole. It is made of a flat plate material formed in a fan shape, and a plurality of engaging parts are provided along the rotating outer periphery of the plate material to be removably engaged with the pedal at the through hole position, and each engaging part can be operated to engage. 1. A pedal lock device comprising a spring body formed such that the distance from the center of rotation gradually decreases along the direction, and biasing the lock lever to the disengaged position.