JP2507570Y2 - Cab lock device - Google Patents

Description

[Detailed Description of the Invention] "Industrial field of application" The present invention relates to a chassis frame in which a cab is supported by a chassis frame so as to be tiltable between a normal standing position and a forward tilted position, and faces a lower rear end of the cab. Fixed striker on the side,
The present invention relates to a cab lock device that is attached to a lower portion of a rear end of a cab and engages with the striker to restrain the cab in the upright position so that the cab cannot be tilted.

"Prior Art" As a conventional cab lock device, for example, a groove for entering a striker is formed in a base member, a bumper rubber member is provided in a deep part of the groove for entering a striker, and a bumper rubber member is burned to form a base. It is generally assembled on a member.

[Problems to be solved by the invention] However, in such a conventional cab lock device, since the bumper rubber member is burned by a special device and assembled to the base member, the assembly is troublesome and the assembly man-hours increase, There is a problem in that the productivity is lowered, and when a support member for holding the bumper rubber member is provided, the number of parts is increased and the cost is increased.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a cab lock device capable of improving productivity and reducing cost.

[Means for Solving the Problem] The gist of the present invention for achieving such an object is that a cab is supported by a chassis frame so as to be tiltable between a normal standing position and a forward tilted position. In a cab lock device, a striker is fixedly installed on a chassis frame side that faces a lower rear end, and is attached to a lower rear end of a cab to engage the striker and restrain the cab to the upright position so that the cab cannot be tilted. A base member on which a groove for entering the striker is formed, and a recess for engaging which has a narrowed front end is formed continuously with the groove inner part of the groove for entering the striker, A latch member pivotally supported by a base member so as to be engaged with and disengaged from the striker; and a latch member pivotally supported by the base member so as to abut the latch member so that the latch member cannot be rocked. A locking plate for restraining the engaged state; a fitting recessed part that fits into a portion projecting from the base member of at least one of both pivot members pivotally supporting the latch member and the locking plate; and a base member of the base member. A striker cushioning bumper rubber member having a locking projection that engages with a hooking recess, and a portion where the fitting recess of the bumper rubber member covers the internal mechanism of the cab block device and the pivot member protrudes. And a cover member formed with a restraining flange for a bumper rubber member that is constrained so that it cannot be removed from the cab lock device.

[Operation] The latch member is pivotally supported on the base member by the pivot member, and the locking plate is pivotally supported on the base member by the pivot member.

To mount the striker cushioning bumper rubber member on the base member, the fitting recess of the bumper rubber member is fitted into at least one protruding portion of the pivot member, and the locking protrusion of the bumper rubber member is inserted into the striker. Through the groove for use, while being bent and thinned, it is passed through the opening and engaged with the recess for locking. As a result, the locking projection of the bumper rubber member cannot be removed from the recess for locking.

Next, when the cover member is attached to the base member, the holding flange of the cover member holds down the bumper rubber member, and the fitting recess of the bumper rubber member does not come off from the protruding portion of the pivot member.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

 1 to 12 show an embodiment of the present invention.

As shown in FIG. 2, a hinge member 11 is fixedly attached to the front end of the chassis frame 10, and the hinge member 11 allows the cab 20 to be fixed.
Is pivotably supported in a normal standing position and a forward leaning position.

A main frame 12 is arranged on the chassis frame 10 along a lower rear end 21 of the cab 20, and a sub frame 15 is supported on the main frame 12 via a pair of spring members 13 and a pair of suspension members 14. ing. A pair of strikers 16 are fixed to the subframe 15. In front of the main frame 12, a hydraulic cylinder 17 that pushes up a rear lower portion 21 of the cab 20 and tilts the cab 20 from a standing position to a forward tilt position is arranged.

A driving-side locking mechanism 40 and a driven-side locking mechanism 40a are arranged in the lower rear end 21 of the cab 20 so as to correspond to the pair of strikers 16. The lock mechanism 40 on the driving side and the lock mechanism 40a on the driven side have substantially the same structure.

Hereinafter, the driving-side locking mechanism 40 will be mainly described, and will be replaced with the description of the driven-side locking mechanism 40a.

As shown in FIGS. 1 to 4, a lock mechanism on the driving side
40 is provided with a base member 41 fixed to the lower rear end 21 of the cab 20. The base member 41 includes a base plate 42 and a base cover 43, and the base plate 42 and the base cover
43 is connected so that a predetermined storage space can be formed between them.

A step portion 44 is formed at an intermediate portion in the vertical direction of the base cover 43, and the step portion 44 makes the lower portion of the storage space narrower than the upper portion thereof.

In each lower part of the base plate 42 and the base cover 43,
Grooves 45 and 46 for entering the striker are formed respectively. The groove 46 for entering the striker of the base cover 43 is a stepped portion.
A groove 46 extending toward the striker for entry of the striker 46
A small circular recess 47 for locking is formed continuously in the inner part of the groove. The hooking recess 47 is close to the step 44, and the width of the opening is narrower than the diameter of the small circle.

A latch member 52 is housed in the lower part of the housing space which is a gap between the lower part of the base plate 42 and the lower part of the base cover 43. A latching member 52 is swingably supported by a pivot 51 extending between both lower portions between an engaging position for engaging the striker 16 and a detaching position for disengaging from the striker 16. As shown in FIG. 6, the front end portion 51 b of the pivot shaft 51 projects forward from the base plate 42, and the rear end portion 51 of the pivot shaft 51.
The a projects from the base cover 43 rearward.

A spring member 58 for urging the latch member 52 in the swinging direction from the engagement position to the disengagement position is stretched between the base plate 42 and the latch member 52.

A driving locking plate 54 is built in between both the base plate 42 and the base cover 43. A lock portion 54a is formed integrally with the driving locking plate 54.

With the pivot shaft 53 installed between the two, the driving locking plate 54 has a lock position in which the lock portion 54a abuts the swing end 52a of the latch member 52 and locks the latch member 52 in the lock position in a lockable state, and a lock position. The portion 54a is pivotably supported at a restraining release position where the restraint of the latch member 52 is released by being disengaged from the swing end 52a.

A spring member 59 for biasing the driving locking plate 54 in a direction of swinging from the restraint release position to the restrained position is stretched between the base plate 42 and the driving locking plate 54.

As shown in FIGS. 3 to 9, the bumper rubber member 60 is adapted to be applied to the step portion 44 of the base cover 43.
Are arranged.

Both end portions 61 of the bumper rubber member 60 respectively project rearward and are thicker than a central portion 62 thereof. Central part 62
The lower edge is formed in an arcuate shape to form an abutted portion 63 with which the striker 16 abuts.
Over the back of the.

On the front surface side of the central portion 62 of the bumper rubber member 60, a locking projection 64 that engages with the locking recess 47 is formed. At the tip of the locking projection 64, a tongue piece 65 for retaining is formed which engages with the peripheral edge of the retaining recess 47.

Engagement recesses 66 that are externally fitted to the front end portions 51b of the pivots 51 are formed on the front surfaces of both side end portions 61 of the bumper rubber member 60. The reason why the engaging recesses 66 are provided on the both side end portions 61 is that a device of different handset is taken into consideration.

A base end portion 56a of an input lever 56 is rotatably connected to a swing end 54b of the driving locking plate 54. A through hole 56b is formed at the tip of the input lever 56.
A connecting shaft portion 71 obtained by bending a front end portion of the operation lever 70 is rotatably attached to the shaft.

A handle portion (not shown) is formed at the base end portion of the operation lever 70.

A long groove 48 extending substantially horizontally is formed in the base cover 43, and when the input lever 56 reciprocates by the locking / unlocking operation of the operation lever 70, the connecting shaft portion 71 is reciprocally moved in the long groove 48. Is movably fitted.

At one end of the long groove 48, a spring member is provided to hold the driving locking plate 54 at the restraint release position via the input lever 56.
Via the driving locking plate 54 and the input lever 56 by the urging force of 59, when the operating lever 70 moves from the locking operation position to the unlocking operation position, the connecting shaft portion 71 is latched,
In order for the driving locking plate 54 to swing from the restraint release position to the restraint position by the biasing force of the spring member 59, the latch member 52
A groove portion 49 for holding a constraint is formed so that the swing end 52a of the latch member 52 hits the connecting shaft portion 71 when the member swings from the disengagement position to the engaging position to release the connecting shaft portion 71.

The swinging end 54b of the driving locking plate 54 has a locking flange that comes into contact with the side edge of the base plate 42 when the driving locking plate 54 swings from the restraint release position to the restrained position.
54c is formed.

The base member 41 is fixedly provided with a cover member 80 that covers internal mechanisms such as the operation lever 70 and the spring member 58. The cover member 80 has two restraining flanges 81, 82 which extend downward and are bent toward the front side base cover 43 side, and the tip portions 81a, 82a of the restraining flanges 81, 82 are bumper rubber members.
It is applied to both side ends 61 of 60.

A fitting groove into which the bumper rubber member 60 is fitted is formed by the tip end portions 81a and 82a of the respective restraining flanges 81 and 82 and the peripheral edge portion of the groove 46 for entering the striker of the base cover 43.

A connecting rod (not shown) is connected to the swinging end 54b of the driving locking plate 54. As shown in FIG. 2, the tip portion 92 of the connecting rod 90 has a lock mechanism 40a on the driven side.
Has been extended to the side.

The lock mechanism 40a on the driven side, like the lock mechanism 40 on the driven side, includes a latch member and a driven locking plate (not shown). The tip end 92 of the connecting rod 90 is connected to the swinging end of the driven locking plate.

 Next, the operation will be described.

A latch member 52 is pivotally supported by a pivot shaft 51 provided between the base plate 42 and the base cover 42 so as to be swingable, and a locking plate is also supported by a pivot shaft 53 also provided.
54 is pivotally supported.

To mount the striker cushioning bumper rubber member 60 on the base member 41 side, the fitting recess 66 of the bumper rubber member 60 is fitted into the rear end portion 51a of the pivot 51, and the locking projection of the bumper rubber member 60 is fitted. 64 for striker groove 46
And is engaged with the recessed portion 47 for hooking. Recessed recess 47
Since the frontage is narrow, the locking protrusion 64 of the bumper rubber member 60
As it passes through the frontage, it flexes slightly and becomes narrower.

As a result, the locking projections 64 of the bumper rubber member 60 cannot come off the locking recesses 47.

Next, when the cover member 80 is attached to the base member 41, both end portions 61 are held by the tip portions 81a and 82a of the holding flanges 81 and 82, so that the locking protrusion 64 of the bumper rubber member 60 is held.
Does not come off from the recess 47 for locking.

Further, since the tongue piece 65 for preventing the bumper rubber member 60 from coming off is locked to the front surface side of the base cover 43, the bumper rubber member 60 does not come off rearward.

As a result, the bumper rubber member 60 is permanently attached to the base member 41 side.

In FIGS. 1 and 10, the latch member 52 is at the engaging position where it engages with the striker 16, and its swing end 52a.
The locking portion 54a is in contact with the driving locking plate 54, so that the locking portion 54a is not swingable. Similarly, the latch member of the driven-side lock mechanism 40a is non-pivotally restrained by the driven locking plate.

As a result, both the driving-side locking mechanism 40 and the driven-side locking mechanism 40a are locked.

In such a state, when the handle portion of the operating lever 70 is pulled out, the connecting shaft portion 71 of the operating lever 70 moves in the long groove 48 from one end to the other end. As a result, the driving locking plate 44 swings from the restraint position to the restraint release position via the input lever 56. Further, the connecting shaft portion 71 of the operation lever 70 is locked by the groove portion 49 for holding and releasing the restraint so as not to return from the other end to the one end.

When the driving locking plate 54 swings to the restraint release position, the driven locking plate swings via the connecting rod 90 to move from the restrained position to the restraint released position.

When both the driving locking plate 54 and the driven locking plate are in the restraint release position, the latch member 52 can be swung to the disengaged position by the biasing force, and similarly, the latch member (not shown) of the lock mechanism 40a on the driven side is biased by the biasing force. It is possible to swing to the detached position.

In this state, the hydraulic cylinder 17 causes the cab 20 to
When the lower rear end portion 21 is pushed up, the latch member 42 of the lock mechanism 40 on the driving side and the latch member of the lock mechanism 40a on the driven side are disengaged from the striker 16, and the cab 20 can be tilted to the forward tilt position.

When the operating lever 70 is in the unlocking operation position and both the driving locking plate 54 and the driven locking plate are in the restraint releasing position, the connecting shaft portion 71 of the operating lever 70 is locked in the restraint release holding groove portion 49. Thus, the driving locking plate 54 is prevented from returning to the restrained position by the biasing force.

In this state, when the operation lever 70 is pushed into the inner locking operation position, the connecting shaft portion 71 of the operation lever 70 is pushed.
Is disengaged from the groove portion 49 for holding and releasing the restraint, and can be moved to the locking operation position.

When the latch member 52 is in the forward tilted position of the cab 20 separated from the striker 16, when the operation lever 70 is pushed to the inner locking operation position, the driving locking plate 54 moves from the restraint release position to the restraint position via the input lever 56. Try to rock. When the driving locking plate 54 tries to swing to the restrained position, the swing end 52a of the latch member 52 abuts on the lock portion 54a of the driving locking plate 54, whereby
The driving locking plate 54 cannot swing to the restrained position. Further, the operation lever 70 is also not pushed into the locking operation position. The driven locking plate (not shown) naturally cannot swing to the restrained position. In the forward tilted position of the cab 20, even if the above operation is performed, the cab 20 does not return to the locked position, and
Even if the cab 20 is carelessly moved from the forward tilted position to the normal standing position, the lock mechanism 40 and the like are not damaged.

When the cab 20 is moved from the forward leaning position to the normal standing position, the striker 16 enters the groove 45, 46 for entering the striker,
The latch member 52 is pushed by the striker 16 and swings, and the latch member 52 engages with the striker 16 to reach the engagement position.

At this time, the striker 16 abuts against the abutted portion 63 of the bumper rubber member 60 to bend the striker 16 and soften the impact.

When the latch member 52 swings to the engagement position, the latch member 52
The swinging end 52a of the operating lever 70 hits the connecting shaft portion 71 of the operating lever 70 from below to remove it from the groove portion 49 for releasing the constraint. When the connecting shaft portion 71 is disengaged from the groove portion 49 for holding and releasing the restraint, the driving locking plate 54 returns to the restraining position by the urging force, and the operating lever 70 returns to the locking operation position.

When the driving locking plate 54 swings from the restraint releasing position to the restraining position, the driven locking plate swings via the connecting rod 90 to reach the restraining position.

As a result, the lock portion 54 of the driving locking plate 54
a comes into contact with the swing end 52a of the latch member 52, and the latch member 52
Is constrained to an engagement position where it engages with the striker 16, and the lock portion of the driven locking plate abuts against the swing end of the latch member so that the latch member is constrained to an engagement position where it engages with the striker 16. . Thereby, the cab 20 can be reliably restrained to the chassis frame 10 side.

In the above embodiment, the fitting recess 66 of the bumper rubber member 60 is fitted on the pivot 51 side, but it goes without saying that it may be fitted on the pivot 53 side if the pivot 53 is in an appropriate place. .

[Advantage of the Invention] According to the cab lock device according to the present invention, the fitting recess of the bumper rubber member is fitted to the pivot member on which the latch member or the like is pivotally supported, and the locking projection of the bumper rubber member is used for entering the striker. Since the fitting recess of the bumper rubber member is prevented from coming off from the pivot member by using the cover member, it is possible to attach the bumper rubber member to a special device. Since it can be easily assembled to the base member without using it, the number of assembling steps can be reduced and the productivity can be improved. Further, since a special part for holding the bumper rubber member is unnecessary, the number of parts can be reduced and the cost can be reduced.

[Brief description of drawings]

1 to 12 show an embodiment of the present invention, FIG. 1 is a front view showing a lock mechanism on a driving side, FIG. 2 is a perspective view showing a mounting state of a cab lock device, and FIG. The figure is a front view showing a lock mechanism on the driving side, FIG. 4 is a side view of the same, FIG. 5 is a sectional view taken along line VV of FIG. 1, and FIG.
-VI line sectional view, FIG. 7 is a front view of the bumper rubber member,
FIG. 8 is a bottom view of the same, FIG. 9 is a side view of the same, and FIG. 10 is a front view of the lock mechanism with the cover member and the like removed.
FIG. 11 is a front view of the lock mechanism, and FIG. 12 is a front view of the lock mechanism with the cover member and the like removed. 10 …… Chassis frame 16 …… Strike 20 …… Cab 21 …… Lower rear end 40 …… Locking mechanism on the driving side 41 …… Base member 42 …… Base plate 43 …… Base cover 45,46 …… For entering striker Groove 47 …… Latching recess 51,53 …… Pivot 52 …… Latch member 54 …… Driving locking plate 56 …… Input lever 60 …… Bumper rubber member 64 …… Locking protrusion 66 …… Mating recess 80 ...... Cover member

Claims (1)

(57) [Scope of utility model registration request] 1. A cab is supported by a chassis frame so as to be tiltable between a normal standing position and a forward tilted position, and a striker is fixedly mounted on the chassis frame side facing a lower rear end of the cab.
In a cab lock device that is attached to a lower portion of a rear end of a cab and engages with the striker to restrain the cab in the upright position so that the cab cannot be tilted, a groove for entering a striker is formed as a base portion of the cab lock device. At the same time, a base member formed with a recess for hooking, which is continuous with the inner part of the groove for entering the striker and has a narrowed width, and a base member swingably supported by the base member and engaged with the striker. A latch member that disengages; a locking plate that is swingably supported by the base member and that abuts on the latch member to restrain the latch member in an engaged state so that the latch member cannot swing; the latch member and the locking plate A fitting recess that fits into a portion of at least one of the two pivot members that respectively pivots and that protrudes from the base member, and a lock that engages with the recess for locking the base member. A striker cushioning bumper rubber member having a projection, and a bumper rubber member for covering the internal mechanism of the cab lock device and constraining the fitting recess of the bumper rubber member from the protruding portion of the pivot member in a non-removable manner. A cab lock device comprising: a cover member having a pressing flange formed thereon.