JPH066176U - Tilt type lock device - Google Patents

Abstract

(57) [Summary] [Purpose] If the front wheel moves backward with respect to the cab due to a collision or the like, the front wheel may interfere with a lock lever arranged behind the cab and the cab may be involuntarily unlocked and tilted up. Is effectively avoided, and the workability is secured by sufficiently reducing the lock lever operating force when tilting up the cab for maintenance or the like. [Structure] A lock lever that controls locking and unlocking of a lock device that locks a tilt-type cab pivotally supported on a chassis frame to the chassis frame is pivoted to a lower portion outside the vehicle width direction near the rear end of the cab. In the case where the lock lever is supported and arranged substantially downward when locking the lock device, the lock lever has a shortened overall length when the lock device is locked, and an extended length when the lock device is unlocked. It is formed as a variable-length lever that can be inserted and removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cab lock device such as a truck having a tilt type cab.

[0002]

[Prior art]

 For trucks equipped with a tilt-type cab, unless the cab is tilted up for maintenance or inspection, the cab should always be locked to the undercarriage frame (including members fixed to the undercarriage frame) before traveling. Inside, there is a lock device to prevent the risk of the cab tilting up unexpectedly. Most of the lock devices are configured to be locked or unlocked by rotating a lock lever or a handle.

An example of the configuration of the above-mentioned cab lock device will now be described with reference to FIGS. 4 and 5. Reference numeral 10 in the drawings denotes a cab of a truck, a part of which is shown, and 12 denotes a cab. An inverted U-shaped or arch-shaped cab bridge with both ends connected to a chassis frame (not shown), and 14 are cab mount brackets that are fixed to the left and right legs of the cab bridge 12 and project outward in the vehicle width direction. , 16 are lock devices interposed between the cab 10 and the cab mount bracket 14. (Note that the configuration of the locking device 16 itself is not directly related to the present invention, and various configurations have already been put to practical use and belong to the public knowledge, so only the outer shape is conceptually shown in the drawing. )

The left and right locking devices 16 are connected to actuating rods 20 and 22 via a link assembly 18, and the actuating rod 20 pivots its outer end in the vehicle width direction to one end of a lock lever or a handle 24. It is worn. The lock lever 24 is pivotally supported on a base plate 28 via a pivot shaft 26, and the base plate 28 is attached to the outer portion of the lower end of the rear wall of the cab 10 by a plurality of bolts 30.

Further, the lock lever 24 has a lock pin 32 which is vertically fixed between the grip 24 ′ and the pivot shaft 26. The lock pin 32 is pivotally supported on the base plate 28 by the pivot shaft 34. It cooperates with the locking recess 38 of the latch 36. On the other hand, a locking plate 40 is provided so as to project outward from the car block bracket 14 in the vehicle width direction, and the locking plate 40 has a hook portion of a safety hook 42 pivotally attached to the bracket on the cab 10. Work with 44.

In the above-mentioned conventional structure, as shown in FIG. 5, the lock lever 24 is in a downward position substantially parallel to the side wall of the cable 10, and the locking recess 3 of the latch 36 is located. In the state in which 8 is engaged with the lock pin 32 on the lock lever 24, the lock device 16 is locked via the operating rods 20 and 22 pivotally attached to the upper end of the lock lever 24, and the cab 10 is cab. The cab 10 is connected to the chassis frame via the mount bracket 14 and the bridge member 12 so that the cab 10 does not tilt up.

Further, when it is desired to tilt up the cab 10 for maintenance or inspection of the engine or the like, the handle 36 ′ of the latch 36 is grasped and the latch 36 is rotated clockwise in FIG. When the engagement between the pin 32 and the locking recess 38 is released, and then the grip 24 'of the lock lever 24 is grasped and the lever is rotated clockwise, the operating rods 20 and 22 are respectively moved to the right. The left and right lock devices 16 are simultaneously unlocked via the link assembly 18.

The lock lever 24 is designed to have a sufficient length in order to minimize the operation force required for the rotation of the lock lever 24 and improve the unlocking workability of the lock device 16. . Therefore, as shown in the schematic side view of FIG. 4, when the cab 10 is locked by the lock device 16 and the lock lever 24 extends substantially downwardly and hangs down, the lower end of the lock lever 24 during normal traveling. The part is normally located immediately behind the tire house of the front wheels 46.

Therefore, when the front wheel 46 moves rearward with respect to the cab 10 as shown by the alternate long and short dash line in FIG. 4 due to a collision accident, the tire of the front wheel contacts the lock lever 24 via the mudguard 48, The lever is inadvertently driven in the unlocking direction to unlock the locking device 16 described above, which may cause the cab 10 to tilt forward and cause a serious accident.

[0010]

[Problems to be solved by the device]

 The present invention was devised in view of the above circumstances, and a lock lever for locking and unlocking the lock device when the cab is locked to the chassis frame has a lock lever near the rear end of the cab. With a locking device that is arranged in a position that hangs downward in the outer lower part in the width direction, if the front wheel is displaced rearward with respect to the cab due to a collision accident, etc., the cab will be unlocked and will tilt up unintentionally It is possible to effectively prevent this, and when tilting up the cab for maintenance, etc., the unlocking operation force of the lock lever can be made sufficiently small to ensure good workability. It is intended to provide.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a lock lever that controls locking and unlocking of a lock device that locks a tilt-type cab pivotally supported on a chassis frame with respect to the chassis frame. In the vehicle width direction outer lower part of the lock device, which is disposed substantially downward when the lock device is locked, the lock lever has a reduced overall length in the locked state of the lock device, and The present invention proposes a tilt-type cab locking device characterized by being formed as a variable-length lever that can be freely inserted / removed so that the entire length is extended when unlocking operation.

[0012]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. (It should be noted that substantially the same members and portions as those of the conventional configuration described with reference to FIGS. 4 and 5 are denoted by the same reference numerals, and duplicate description will be omitted.) According to the present invention, As best shown in the enlarged front views of FIGS. 2 and 3, a pivot shaft 26 (only its center line is shown in FIG. 1) is provided at a lower portion in the vehicle width direction near the rear end of the cab 10. The pivotally supported lock lever 24 is composed of an upper member 24a and a lower member 24b fitted to the lower end portion of the upper member 24a so as to be freely inserted and removed in the axial direction.

The lower member 24b is a pipe member 52 having an engagement groove 50 whose front shape is L-shaped, and a grip made of a resin material fixed to the outside of the lower end portion of the pipe member 52. 24 ', and the engaging groove 50 is composed of a linear portion 50a extending in the axial direction and a locking portion 50b bent in the circumferential direction from the lower end of the linear portion and extending slightly upward.

On the other hand, a pin 54 slidably fitted in the engagement groove 50 is projectingly provided at a lower end portion of the upper member 24a which is removably fitted in the lower member 24b. A spring 56 is contracted between the lower end surface of the upper member 24a and the lower end bottom surface of the lower member 24b.

In the above-described configuration, the lower member 24b of the lock lever 24 is attached to the spring 56 as shown in FIG. 2 under normal conditions except when the cab 10 is tilted up for maintenance and inspection of the engine and the like. The lock lever 24 is shortened by pushing it against the upper member 24a and then slightly rotating it about the axis to engage the pin 54 with the engaging portion 50b. Therefore, in the locked state of the lock device 16 shown in FIG. 1, the ground height of the lower end portion of the lock lever 24 becomes sufficiently high, and even when the front wheel 46 is retracted with respect to the cabin 10 due to a collision or the like, the front wheel 46 is not locked. 46 is held at a high position where it does not interfere with the lock lever 24. Therefore, the risk that the lock device 16 is inadvertently unlocked and the cab 10 is tilted up and the damage of the accident is increased is effectively avoided.

Next, when the cab 10 is tilted up for inspection and maintenance of the engine and the like, the lower member 24b of the lock lever 24 is slightly rotated around the axis line, and the spring force of the spring 56 causes the lower member 24b to rotate. , The lower member 24b is displaced in the axial direction with respect to the upper member 24a while the pin 54 relatively slides along the straight portion 50a in the engaging groove 50, and is shown in FIG. The lock lever 24 extends as described above. Therefore, when the grip 24 ′ of the lock lever 24 is gripped and the lever is rotated upward around the pivot 26 to unlock the lock device 16, a sufficient lever length is ensured and a required operating force is obtained. Can be made smaller.

[0017]

[Effect of device]

 As described above, the tilt-type cab locking device according to the present invention is provided with a lock lever that controls locking and unlocking of the lock device that locks the tilt-type cab pivotally supported on the chassis frame to the chassis frame. In the case where the lock lever is pivotally supported at a lower portion in the vehicle width direction near the rear end of the cab and is arranged substantially downward when the lock device is locked, the lock lever has a full length when the lock device is locked. It is shortened and is formed as a variable length lever that can be freely inserted and removed so that the entire length is extended when unlocking the locking device.When the front wheel retracts with respect to the cab due to a collision, etc. The danger that the cab will tilt up unintentionally due to interference with the lock lever can be reliably avoided, and when tilting the cab for maintenance, etc. The unlocking operation force of Clever there is an advantage that can sufficiently small.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a mode in which the entire length of the lock lever 24 in FIG. 1 is shortened.

FIG. 3 is an enlarged side view showing an extended state of the lock lever 24 shown in FIG.

FIG. 4 is a schematic side view showing a structure near a rear end of a conventional cab.

5 is a partial front view seen from the direction of arrow V in FIG.

[Explanation of symbols]

 10 cab 12 cab bridge 16 locking device 24 locking lever

Claims (1)

[Scope of utility model registration request] 1. A lock lever that controls locking and unlocking of a lock device that locks a tilt-type cab pivotally supported on a chassis frame with respect to the chassis frame is a lower part outside the width direction near the rear end of the cab. When the lock lever is pivotally supported on the lock device and is disposed substantially downward when the lock device is locked, the lock lever has a shortened total length when the lock device is locked, and a full length when the lock device is unlocked. A tilt-type cab locking device, which is formed as a variable length lever that is stretchable and detachable.