JPH076072Y2 - Tilt type cab locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cab lock device such as a truck having a tilt cab.

(Prior Art) For trucks, tractors, etc. equipped with tilt-type cabs, always use the cab for the chassis frame (including members fixed to the chassis frame) unless the cab is tilted up for maintenance or inspection. Locked against, while running,
A locking device is provided to prevent the risk of the cab tilting up unexpectedly. The lock device is usually configured to be locked or unlocked by rotating a lock lever or a handle.

An example of the configuration of the cab lock device will now be described with reference to FIG. 1 showing an embodiment of the present invention for convenience. Reference numeral 10 in the drawing denotes a cab of a truck, a portion of which is shown, and 12 denotes a cab. An inverted U-shaped or arch-shaped bridge member whose both ends are connected to a chassis frame (not shown), 14 is a cab mount bracket fixed to the left and right legs of the bridge member 12 and protruding outward in the vehicle width direction, Reference numeral 16 is a lock device 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 outline is conceptually shown in the drawings. The left and right locking devices 16 are connected to actuation rods 20 and 22 via a link assembly 18, and the actuation rod 20 has its outer end in the vehicle width direction pivotally attached to one end of a lock lever or handle 24. ing. Lock lever 24
Is pivotally supported on a base plate or bracket 28 via a pivot 26, and the base plate 28 is pivotally attached to the lower end of the rear wall of the cab 10 by a plurality of bolts 30. Further, a latch 34 is pivotally mounted on the base plate 28 by a pivot 32, and an extension portion of a pin 38 pivotally mounting the lock lever 24 and the operating rod 20 is provided in an engagement recess 36 formed in the latch 34. It is configured to fit. (Note that the above pin 38
Independent lock pin on the lock lever 24 instead of the extension of
38 may be provided. ) On the other hand, a frame-shaped locking member 40 is projectingly provided on the upper surface of the cab block bracket 14, and the locking member 40 has a hook of a safety hook 42 pivotally attached to the bracket on the cab 10. Collaborate with Department 44. An inner end of an operating rod 46 extending through the guide hole of the base plate 28 and extending near the outer surface of the vehicle body is pivotally attached to the safety hook 42. By pulling to the left in FIG. 1, the engagement between the hook 44 and the locking member 40 is released.

Further, a stopper pin 48 is projectingly provided at one end of the lock lever 24, and the stopper pin 48 abuts a stopper member 50 provided on the vehicle body side member, for example, the base plate 28, thereby limiting the correct locking position of the lock lever 24. It
A switch device 52 is provided adjacent to the stopper member 50 and is controlled to be opened and closed by a stopper pin 48. The switch device 52 is closed when the lock lever 24 is in a position other than the correct locking position and the driver's seat. Prompts the driver to activate the alarm device such as an alarm lamp provided on the instrument panel to notify the driver of the fact and take necessary measures.On the other hand, when the lock lever 24 is in the correct locking position, the above pin is pressed. It was opened by 48 to deactivate the alarm system.

In the above structure, when the lock lever 24 is in the normal locking position shown in the drawing, the extension of the pin 38, that is, the lock pin is engaged with the engaging recess 36 of the latch 34, so that the lock lever 24 is shaken or shaken during traveling. Is locked so as not to rotate in the unlocking direction (of course, the latch 34 is provided with a counterclockwise rotational force by a torsion spring or the like not shown), and at this time, the lock lever 24 is The locking device 16 is locked via the operating rod 20 connected via the pin 38 and the operating rod 22 pivotally connected to the operating rod,
Cab 10 is a cab mount bracket 14, bridge member
It is connected to the chassis frame via 12 so that the cab 10 does not tilt up.

If the cab 10 needs to be tilted up for maintenance or inspection of the engine or the like, hold the handle at the lower end of the latch 34 and rotate the latch 34 clockwise to lock the lock pin 38.
And the locking recess 36 are disengaged, and then the handle portion of the lock lever 24 is grasped and the lever is rotated counterclockwise,
The actuating rods 20 and 22 move to the right respectively, and the link assembly 18
The left and right lock devices 16 are simultaneously unlocked via the. In many tilt-type cabs 10, in order to reduce the tilt operation force, in the initial stage of tilt-up, the cabin is tilted to a certain tilt angle by a spring force. The lock suddenly causes the cab 10 to spring up, which is dangerous. Therefore, a safety hook 42 is provided, and after unlocking the locking device 16, the operator pulls the operation rod 46 while holding the tilt grip (provided on the cab 10) (not shown) to pull out the safety hook 42. By rotating the cab 10 clockwise in the drawing to release the engagement between the hook portion 44 and the locking member 40, the tilt-up of the cab 10 is started.

(Problems to be Solved by the Invention) In the conventional cab lock device described above, as already described, the tilting direction, that is, the upward elastic force always acts on the cab 10 in the locked state of the lock device 16. On the contrary, when the lock lever 24 in the unlocked position is rotated clockwise in FIG. 1 to lock the lock device 16, the lock lever 24 is rotated clockwise by the spring force at the final stage. The stopper pin 48 impacts the stopper member 50.

In the conventional configuration, since the stopper pin 48 is usually made of steel and does not have a function of mitigating the shocking abutment, the switch device 52 that abuts the stopper pin 48 and is opened / closed frequently fails. There was a problem.

An object of the present invention is to prevent the switch device for detecting the above-mentioned cab lock state from failing and improve its durability.

(Means for Solving the Problems) The present invention was devised to achieve the above object, and locks and unlocks a lock device that locks a tilt-type cab pivotally supported by a chassis frame to the chassis frame. A lock lever that controls the lock, a stopper pin that projects on the lock lever and is provided on the vehicle body side to limit the locking position of the lock lever, and a stopper pin that is arranged adjacent to the stopper member. A switch device which is provided and whose opening and closing is controlled by the stopper pin, wherein a metal outer cylinder is attached to an outer peripheral portion of the stopper pin that abuts the stopper member via an elastic material layer such as rubber. The gist of the invention is a tilt type cab locking device characterized by the following.

(Operation) According to the present invention, the lock lever is projected and abuts against the stopper member on the vehicle body side to limit the locking position of the lock lever, and abuts on the switch device for detecting the cab lock state to open and close the lock device. An outer cylinder made of metal is attached to the outer peripheral portion of the stopper pin for controlling the contact of the stopper pin with the elastic member layer such as rubber. With this configuration, the shocking abutment of the stopper pin against the stopper member when the lock lever is rotated to the locked position is mitigated, and thus the impact force acting on the switch device is mitigated. Further, since the elastic material layer such as rubber is protected by the outer cylinder, the surface damage, the sag, etc. of the elastic material layer which occurs when the outer cylinder is lacking are prevented.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. (Note that redundant description of the members and parts already described in relation to the conventional device will be omitted.) According to the present invention, the enlarged front view of the essential parts of FIG. 2 and the sectional view of the essential parts of FIG. As indicated, the stopper pin 48 is the pin body 4
The square shaft 54 formed near one end of 8'is locked by the lock lever 24
It is fixed on the same lever by fitting it in the corresponding square hole and tightening the nut 56. Also, the stopper pin 48
The rubber layer 58 on the pin body 48 'adjacent to the angular shaft 54.
An outer cylinder 60 made of metal, for example, steel, is fixed by baking through. On the other hand, the outer cylinder of the base plate or bracket 28
An angled stopper plate, that is, a stopper member 50 is attached to an end edge facing the 60, and a bent rising portion of the stopper plate provides a large contact area when the outer cylinder 60 abuts. Therefore, the outer cylinder 60 of the base plate 28
The edge facing each other is bent upward to form an upward flange, or when the base plate 28 has a sufficient thickness, the stopper plate 50 as a separate member is omitted and the base plate 28 itself is used as the stopper member. be able to.

In the illustrated embodiment, together with the stopper plate 50, a protective casing 62 accommodating the switch device 52 is fastened and fixed to the base plate 28, and the protective casing protects the switch device 52 from muddy water and flying stones.

According to this structure, when the lock lever 24 is rotated from the disengaged position to the applied position as described above, the outer cylinder 60 of the stopper pin 48 is moved at a relatively high speed by the spring force in the lock system. Even if it abuts on 50, the impact is effectively absorbed by the rubber layer 58, so that the impact applied to the operating end of the switch device 52 is reduced, and its early breakage can be effectively prevented and durability can be improved. . Further, since the rubber layer 58 is covered by the outer cylinder 60, it is possible to prevent the surface of the rubber layer 58 from being scratched and the rubber layer itself being rapidly damaged as in the case of the rubber layer 58 alone. During normal operation when the cab 10 is locked, only one side of the rubber layer abuts the stopper plate 50 for a long time to cause early setback. Since a compressive force is generated and a tensile force is generated on the opposite side, the force is borne by the entire rubber layer, so that there is an advantage that no settling occurs for a long period of time.

In the above embodiment, the shape and arrangement of the lock lever 24 can be changed as appropriate.
Can be arranged so as to extend downwardly from its pivot axis 26. Further, the shapes and structures of the latch 34 and the safety hook 42 can be arbitrarily changed, and in some cases, they can be replaced with another safety mechanism having the same effect.

(Effect of the Invention) As described above, the tilt type lock device according to the present invention controls locking and unlocking of the lock device that locks the tilt type cab pivotally supported by the chassis frame to the chassis frame. A lock lever, a stopper pin that projects on the lock lever and is provided on the vehicle body side to limit the locking position of the lock lever, and a stopper pin that is provided adjacent to the stopper member. What comprises a switch device whose opening and closing is controlled by a stopper pin, wherein an outer cylinder made of metal is attached to an outer peripheral portion of the stopper pin that abuts on the stopper member via an elastic material layer such as rubber. And the durability of the switch device for detecting the lock state of the cab can be improved, which is practically useful.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of the present invention, FIG. 2 is an enlarged front view of an essential part of FIG. 1, and FIG. 3 is a sectional view of the essential part of FIG. 10 …… cab, 12 …… bridge member, 14 …… cab mount bracket, 16 …… lock device, 20 and 22 …… operating rod, 24 …… lock lever, 28 …… base plate,
48 …… Stopper pin, 50 …… Stopper plate, 52 ……
Switch device, 58 …… Rubber layer, 60 …… Outer cylinder.

Claims (1)

[Scope of utility model registration request] 1. A lock lever for controlling locking and unlocking of a lock device for locking a tilt-type cab pivotally supported on a chassis frame with respect to the chassis frame; a lock lever projecting on the lock lever and disposed on the vehicle body side. A stopper device which cooperates with the stopper member to limit the locking position of the lock lever, and a switch device which is disposed adjacent to the stopper member and whose opening and closing is controlled by the stopper pin. A tilt type cab locking device characterized in that a metal outer cylinder is attached to an outer peripheral portion of the pin that abuts the stopper member via an elastic material layer such as rubber.