JPS6025289B2 - Forced operation prevention device for automotive control levers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing forced operation of a control lever for an automobile.

For example, a three-turn dump truck that can tilt the cargo box in three directions: rearward, rightward, and leftward has lock pins 2 as shown in Figure 1 attached to the four corners of the cargo box 1. A full box 1 is held on the vehicle body frame by competing the pin 2 with an opening 4 of a bracket 3 fixed to the vehicle frame side.

When the packing box 1 is tilted to the right, the two lock pins 2 located at the front right corner and the rear right corner of the packing box 1 are locked with the lock claws 5 so that they do not come off the bracket 3, and then When tilting the shipping box 1 to the right using the locked lock pin 2 as a fulcrum, or tilting the surgery box to the left, use the two lock pins 2 located at the front left corner and rear left corner of the box 1.
is locked by the lock claw 5 so as not to deviate from the bracket 3, and then the cargo box 1 is tilted to the left using the locked lock pin 2 as a fulcrum.

Similarly, if you lock the lock pins 2 on the left and right rear corners,
The cargo box 1 is tilted rearward. In this case, the lock pin located on the opposite side to the lock pin serving as the fulcrum is not locked to the bracket and separates from the bracket as the guard box tilts. The control mechanism for operating the lock pawl 3, which functions as described above, has a structure as shown in FIG. ,5b
, 5c, 5d to cable 7, links 8, 9, rod 1
0, 11, 12, and 13, and by rotating the control lever 6 upward or downward and sliding the cable 7 in the direction of arrow 1 or the direction of arrow □, the link 8,
By sliding the rods 10, 11, 12, 13 in the direction of the arrow plate or in the direction of the arrow N through the levers 9, either the right lock claws 5a, 5b or the left lock claws 5c, 5d can be locked into the lock pin 2. It is designed to be engaged with.

In addition, when the control lever 6 is in the neutral position, the control mechanism is configured such that the front locking claws 5a, 5c
does not engage with the lock pin 2, and the rear lock claws 5b, 5
d is. A joint 14 interposed between the joints 11 and 13
, 15 and springs 16, 17 to engage the lock pin 2. By the way, if you use this control mechanism for many years, sand and dust will accumulate on the various connecting parts and movable parts of the control mechanism, and the packing box will become twisted, causing the positional relationship of each member to become erroneous. lock claws 5a, 5b, 5c, 5d
Locking and unlocking becomes difficult.

However, this control mechanism consists of cable 7, links 8 and 9. rods 10, 11, 12, 13, joints 16, 1
7, etc., if the control lever 6 is rotated forcibly, the cable 7 interposed between the control lever 6 and the lock claws 5a, 5b, 5c, and 5d will be damaged. Elongation, rods 10, 11, 12, 13
etc., and it became possible to switch the control lever 6 to a predetermined position, and there was a risk that the control mechanism would be damaged due to repeated operation of the force bar. In view of the above-mentioned problems, the present invention provides a device that protects the control mechanism by making it impossible to operate the control lever when the control lever is operated with a load greater than the required load for normal operation. The details of this invention will be explained below according to the embodiments shown in the drawings.

FIGS. 3 and 4 are drawings showing a control lever A according to this invention, and this control lever A has a traction part a such as a cable for operating the control mechanism as described above connected to the end thereof, It has a fan-shaped guide plate 21 with an arcuate edge at the rear and is rotatably held by a stationary member b, and has a first lever 22, and a bifurcated part that covers the outer periphery of the guide plate 21 at the front. 23, and the front part of the bifurcated part 23 is pivotally connected to the guide plate 21 by a pin 25.
The lever 24 moves the guide plate 2 around the pin 25.
1 until it comes into contact with stopper parts 26 formed at both ends of the guide plate 21.

27 is a guide plate 2 located approximately at the center of the arcuate periphery.
1, a through hole 28 is a hole provided at a position corresponding to the through hole 27 of the bifurcated portion 23, and 29 is a hole 27 formed in both holes 27.
, 28 is a plate spring attached to the side of the second lever 24 by an adjustment bolt 31 in order to press the lock ball 29 into the holes 27 and 28, as described above.

The pick ball 29 is pushed into the holes 27 and 2 by the pressing force of the leaf spring 30.
8, the first lever 22 and the second lever 24 are brought together by the lock ball 29 in the normal state. Note that the portion 32 of the leaf spring 30 that engages the adjustment bolt 31 is made into a long hole so that the leaf spring 30 can bend outward, and the pressing force of the leaf spring 30 is applied to the adjustment bolt 31. Make sure that you can adjust it accordingly. When the control mechanism of the control lever A configured as described above is operating normally and the control lever A can be operated with a predetermined load,
Since the second lever 24 and the first lever 22 are connected by the lock ball 29, the control mechanism can be operated without any problem.

If an abnormality occurs in the control mechanism and the operator applies a load greater than a predetermined value to the second lever 24 and attempts to forcefully rotate the control lever A, the first lever 24
2 and the second lever 24.
9 detaches from the through hole 27 formed in the first lever 22 against the pressing force of the leaf spring 30.
2 and the second lever 24 is released, and only the second lever 24 rotates together with the lock ball 29 on the guide plate 21 about the pin 25, and a force exceeding a predetermined value is applied to the first lever 24. At the same time, it prevents the signal from being transmitted to the control mechanism via the lever 22 and protects the control mechanism.
Notify the operator that an abnormality has occurred in the control mechanism. Note that the first lever 22 and the second lever 22 are disengaged from each other.
The lever 24 means that the second lever 24 is rotated and the second lever 24 is turned.
The hole 28 of the lever 24 is connected to the through hole 27 of the first lever 22.
If the lock ball 29 is positioned above the hole 281, the lock ball 29 aligned with the hole 281 will be engaged with the through hole 27 by the pressing force of the leaf spring 30, so that the first lever 22 and the second lever 24 will be integrated again. can be engaged with. FIGS. 5 and 6 show a second embodiment of the control lever A according to this invention, and numeral 41 denotes an end rotatably held by a stopper member b as in the first embodiment. a first lever to which a pulling member a such as a cable for operating a control mechanism is connected; 42 is a band-shaped guide plate formed in an arc shape provided at the rear end of the first lever 41; 43 is a guide plate 4;
The stoppers 44 formed at both ends of the guide plate 2 are lock grooves provided at the center of the end face of the guide plate.

Reference numeral 45 designates a second lever consisting of a cylindrical portion 47 having a bifurcated portion 46 at the front, and a shaft portion 48 having an adjust port function screwed into the rear inside of the cylindrical portion. 45 is rotatably held by the first lever 41 by pivoting the bifurcated portion 46 to the rear of the first lever 41 with a pin 50.

Further, the lock ball 51 inserted into the cylindrical part 47 is pressed against the locking mechanism 44 provided on the first lever 41 by the spring 52 also inserted into the cylindrical part 47, so that the lock ball 51 inserted into the cylindrical part 47 is pressed against the locking mechanism 44 provided on the first lever 41. It is configured so that it is integrated with the second lever 45. Incidentally, the pressing force of the spring 52 can be freely adjusted by the adjusting function of the shaft-shaped portion 48. Then, when operating this control lever A, an abnormality occurs in the control mechanism, and the control mechanism cannot be operated simply by applying a predetermined load to the second lever 45. If you try to forcibly rotate the control lever A, the lock ball 51 connecting the first lever 41 and the second lever 45 will resist the pressing force of the spring 52 and move out of the lock groove 44. Since the engagement relationship between the first lever 41 and the second lever 45 is released, the second lever 45
The lever rotates on the guide plate 42 together with the lock ball 51 about the pin 50, and prevents a force exceeding a predetermined value from being transmitted to the control mechanism via the first lever 41.

As explained above, this invention has a pulling member such as a cable for operating a control mechanism connected to one end, an arcuate guide plate at the other end, and is locked at the center of the arcuate guide plate. a first lever provided with an engagement hole for the purpose of use, and a second lever having a bifurcated portion rotatably connected to the first lever at one end with the guide plate sandwiched from both sides. , a lock ball that is held by a second lever, is removably associated with a locking hole in the center of the guide plate, and is always pressed toward the locking hole by a presser spring. Therefore, the connection rigidity between both levers is high under normal conditions, and the operating force can be reliably transmitted to the control mechanism.If a problem occurs with the link, the lock ball will lock against the pressing force of the presser spring. Once removed from the engagement hole, only the second lever can be bent in either the forward or reverse direction, preventing excessive operating force from being transmitted to the control mechanism, protecting the control mechanism, and at the same time protecting the control mechanism. It is possible to notify the operator that an abnormality has occurred.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a structure for holding a cargo box of a tri-turn dump truck to the vehicle body frame, Fig. 2 is a perspective view showing a control mechanism for operating a lock pawl, and Fig. 3 is a perspective view of a control lever according to the present invention. FIG. 4 is a side view showing the first embodiment, FIG. 4 is a partial sectional view, FIG. 5 is a side sectional view showing the second embodiment of the control lever according to the present invention, and FIG. 6 is a plan sectional view. A... Control lever, 22... First lever, 2
4...Second lever, 25...Pin, 27...
Through hole, 28... Hole, 29... Lock ball, 30... Leaf spring, 41... First lever, 44
... Lock groove, 45 ... Second lever, 50 ... Pin,
51...Rock ball, 52...Spring, a...
... Traction member, b... Stationary member. Figure 1 2
Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1 A pulling member such as a cable for operating the control mechanism is connected to one end, and an arc-shaped guide plate is connected to the other end, and an engagement hole for locking is provided in the center of the arc-shaped guide plate. a first lever; a second lever having a bifurcated portion rotatably connected to the first lever at one end with the guide plate sandwiched from both sides; A control lever for an automobile comprising a lock ball that is removably associated with a lock engagement hole in the center of a guide plate and is constantly pressed by a presser spring toward the engagement hole. Anti-manipulation device.