JP2000310073A - Cab window locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold an unlocking lever of a latch in a released condition in association with unlocking operation for facilitating the following operation. SOLUTION: This device is combined with a rotary latch 14 and an unlocking lever 15 for restricting the rotational movement of the latch 14 in its unlocking direction. It has an unlocking lever holding mechanism 20 for engaging the unlocking lever 15 at a unlocking position of the latch 14. The unlocking lever holding mechanism 20 is formed so that the latch 14, if rotationally moved at a rotating angle as required, can release the unlocking lever 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for a window mainly provided in a cab of a construction machine, and more particularly to an operation device capable of holding a release lever in a release position after releasing a lock in a lock mechanism. The present invention relates to a room window lock device.

[0002]

2. Description of the Related Art Conventionally, as for a lock device used for a door or the like, locking mechanisms having various structures have been proposed and put to practical use. In these lock devices, in a type using a rotary latch, the lock release lever of the latch is normally automatically locked when the latch is closed,
When the lock is released by operating the lock release lever from the outside, the latch is released from engagement with the striker by applying a rotational force to the latch.

[0003]

However, in the above-mentioned lock device, even if the release operation is performed by the lock release lever, if the operating force is removed from the lock release lever (if the hand is released) unless the latch is turned, the lock device is re-opened. The lock release lever returns and locks the latch, so that the latch is not unlocked.

For this reason, a lock device is provided at a plurality of locations, and an opening / closing device having a structure that cannot be opened unless all of the lock devices are released, for example, a vertical opening / closing window, is provided on the left and right sides thereof. If the lock release lever of the lock device is not opened and closed while maintaining the unlocked state, the lock cannot be released securely, and handling is extremely inconvenient.
There is a problem.

According to the present invention, there is provided a driver's cab window locking device in which, when an unlocking operation is performed, an unlocking lever of a latch is held in a released state in conjunction with the operation, so that the next operation can be easily performed. It is intended to provide.

[0006]

In order to achieve the above-mentioned object, a driver's cab window locking device according to the present invention regulates a rotation type latch and a rotation of the latch in a releasing direction. A release lever releasing and holding mechanism that engages with and releases and releases the release lever at the lock release position of the latch by the release lever. It is characterized in that the release lever is released when the required rotation angle is turned.

According to the present invention having the above structure, when the release lever is operated to release the engagement between the latch and the release lever to release the lock of the latch, the latch is unlocked by the release lever. The release lever release / holding mechanism provided together prevents the release lever from returning and temporarily holds the release lever. Accordingly, the latch becomes free, and can be unlocked by rotating with the accompanying rotating operation force.
When the latching position of the latch and the release lever is displaced by the rotation of the latch in the release direction, the release lever release / holding mechanism is also operated by the latch in accordance with the displacement of the release lever, whereby the release / release of the release lever is released. Then, when the latch engages with the striker (closing bolt) to exhibit a locking function, the release lever can be returned to a state where it can be engaged with the latching position of the latch.

Since the lock device of the present invention is constructed as described above, when the lock is released and the release operation is performed, the latch is automatically released by operating the release lever of the latch to release the lock of the latch. Thereafter, the release lever can be released without adding a hand such as holding the release lever, so that the operability can be improved when a plurality of lock devices need to be released.

The release lever release / holding mechanism is supported by a support shaft of the latch and is configured to rotate together with the release lever only when the latch is rotated in the release direction. A release lever holding striker provided adjacent to the toe portion, and a spring for urging the release latch to rotate in the return direction may be provided. In this case, the mechanism for releasing and holding the release lever can be arranged on the same axis as the latch, so that the whole can be compactly assembled, and the number of parts can be reduced and the cost can be reduced. .

[0010] The tip of the claw piece formed continuously with the striker receiving portion of the latch for the release lever is such that the striker of the release lever is positioned within the rotation radius of the tip of the claw piece in a latched state by the release lever. When the release lever is displaced to a position where the latch is released, it is preferable that the release lever is moved beyond the tip of the claw. According to this configuration, the striker attached to the distal end of the release lever is provided by the claw distal end provided on the release lever latch, at the moment when the latch release operation by the release lever is performed.
The return operation of the release lever can be prevented, and the release lever can be reliably released and held. Moreover,
By rotating the latch after the lock is released, the striker of the release lever is returned to a restorable state, and when the lock operation is performed by the next latch, the striker is stored within the rotation radius of the tip of the claw piece, and the release lever can be stably held in the locked state.

The release lever releasing and holding mechanism is a lock claw piece provided with a base pivotally supported near the latching side of the latch by the release lever so that the distal end faces the distal end of the release lever. An operating piece attached to the lock claw piece and operating on the lock claw piece by rotating the latch in contact with the outer periphery adjacent to the locking portion of the latch by the release lever; and A spring for biasing the release lever to move in the direction of the rotation axis, wherein a striker protruding from an outer surface of a latch engagement end of the release lever is operated by the lock claw piece. Is good. The position of the projection provided with the release lever is located within the rotation radius up to the tip of the lock claw in the latched state, and when displaced to the position where the latch is unlocked, the projection exceeds the tip of the lock claw. It is better to be.

In this case, when the release lever is operated to release the engagement with the latching portion of the latch and the lock is released, the release lever protrudes from the outer side surface at the latched end of the latch. The protrusion comes into contact with the tip of the lock claw piece and pushes outward. Then, the lock claw is rotated with reference to the pivot point of the base, and the contact with the projection on the side of the latching end of the release lever is cut off, and the projection moves outward from the tip of the lock claw. And fixed. As a result, the latch becomes rotatable in the unlocking direction by the rotational force of the biased torsion spring or the like, and disengages with the striker to release the structure (door, window, etc.) provided with the locking device. Can be released. In addition, the operation piece is pushed outward by the rotation of the latch to move the lock claw piece outward by releasing the release lever, so that the release lever returns to the latch side. Next, when the latch is brought into a state of engagement with the striker, the locking end portion is engaged with the locking portion of the latch, so that the latch can be locked. In this way, the release lever can be reliably released by the release lever release holding mechanism in conjunction with the release operation of the latch, and thereafter, the release lever can be immediately responded to the next lock operation in conjunction with the release of the latch. The effect is that it is possible to automatically return to normal.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a cab window locking device according to the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a cab for a construction machine to which the lock device of the present embodiment is mounted, and FIG. 2 is a front view of the lock device of the first embodiment, in which main parts are cut away, and FIG. Exploded perspective views of the locking device shown in FIG. 2 are shown respectively.

In this embodiment, a lock device for a pull-up open type front window provided on the front of an operator cab of a construction machine such as a hydraulic shovel will be described. The cab body 1 has front pillars 2 located on the front side thereof.
A pair of guide rails 4 and 4 are provided on the left and right indoor sides from 2 to the ceiling side portions 3 and 3, respectively, and a front window 5 is movably provided along the guide rails 4 and 4. On both sides of the window frame 6 of the front window 5, guide rollers 7 are respectively provided at upper and lower portions so as to be rotatable by support shafts projecting from the side surfaces of the window frame 6, and these guide rollers 7 are arranged along the guide rail 4. By moving the front window 5, the front window 5 can be moved from the front surface of the cab body 1 to the lower surface position of the ceiling. In order to move the front window 5 up and down, handles 8 and 8 'for opening and closing windows are attached to the upper and lower portions of the window frame 6, respectively.

At the upper part of the front window 5 on the indoor side, locking devices 10 are provided on both left and right sides of the window frame 6, respectively.
It is supported symmetrically and is mounted symmetrically. In each of these lock devices 10, 10, a rotatably provided latch 14 is disposed so as to be located outside the window frame 6.
A mounting bracket 31 is provided on the cab body 1 side when the front window 5 is closed.
A striker 30 is protruded from the latch 14 in parallel with the support shaft 13 of the latch 14.

Since the lock device 10 is provided symmetrically, one of the lock devices (specifically, the lock device on the left side when viewed from the driver's seat side) will be described. Bracket 11 protruding inward at the top of window frame 6 in a direction perpendicular to window glass 6a
And a frame 12 constituted by combining two pieces whose base is attached to the bracket 11 with bolts 33.
The frame 12 has both ends supported by the window glass 6.
a latch 14 which is rotatable on a support shaft 13 disposed in parallel with a, a striker 30 protruding from the cab body 1 side in parallel with the support shaft 13, and a latch 14 and the striker 30. It is a combination of a release lever 15 of the latch that can release the engagement and a release lever release holding mechanism 20 that releases and holds the release lever 15 after releasing the lock of the latch 14.

The latch 14 is formed with a locking notch 14a in the radial direction from the center of rotation, and a locking recess 1 is formed in a peripheral portion just opposite to the location where the locking notch 14a is formed with respect to the axis.
4b is provided. A torsion spring 17 is fitted on the support shaft 13 of the latch 14, and one end thereof is provided on the frame 12 side and the other end is provided on a proper position of the latch 14. The rotational force is urged to the motor.

With respect to the latch 14 thus constructed, an upright surface (the window frame 6 in the figure) passing through the axis of the support shaft 13 is provided.
The release lever 15 is provided so that the axis of the pivot shaft pin 16 is positioned on a plane parallel to the release lever 15). The distal end side of the release lever 15 from the pivot shaft pin 16 is a locking end 15a.
The latch 14 is locked such that when the locking end 15a engages with the locking recess 14b provided in the latch 14, the latch 14 is locked. The release lever 15 is provided with a torsion spring 17 'for pulling back with a fixed end fixed to the frame 12, so that it can be automatically returned after the lock is released.

Further, the locking end 1 of the release lever 15
A striker 18 protrudes from the side surface near 5a in parallel with the pivot pin 16 so as to be associated with a release lever release holding mechanism 20 described later.

The release lever release / holding mechanism 20 is mainly composed of a release lever latch 21 which is rotatably provided on the support shaft 13 of the latch 14 in parallel with the latch 14,
The release lever latch 21 is provided with a torsion spring 24 that constantly urges the rotating force in a direction to always close the release lever latch 21 (counterclockwise in the drawing). When the latch 14 is engaged, the lock of the latch 14 is maintained. When the latch 14 is released, the striker 18 of the release lever 15 is moved away from the latch 14 so that the latch 14 becomes free.

The release lever latch 21 is mounted on the support shaft 1.
A locking recess 21a rotatably supported on the lock lever 3 and engaging the striker 18 provided at the locking end of the release lever 15 to lock the release lever 15; and the locking recess 21a. Hook-shaped projection 2 that projects in the circumferential direction by connecting to
2, and a locking piece 23 bent on the peripheral surface side of the latch 14 so as to be parallel to the support axis at a position separated by a required rotation angle from the protruding portion 22.
), The striker 18 of the release lever 15 engages with the locking recess 21a and is held by the accumulated force of the torsion spring 24.

The projecting portion 22 of the release lever latch 21 has a sharpened tip 22a, and has a turning radius r at which the striker 18 attached to the release lever 15 is rotated by a release operation. Is rotated to the position of a stopper 19 provided on the frame 12, the striker 18 comes out of the rotation range (rotation radius R) of the tip 22a of the projection 22 in the release lever latch 21, and the projection The return is prevented by the tip 22a of the portion 22.

The locking piece 23 of the release lever latch 21 is released from the latch 14 by the release lever 15 so that the striker 18 is moved to the locking recess 21a.
At the time of release from the engagement with the protruding portion 22 connected to the torsion spring 24, the rotation of the torsion spring 24 is suppressed by the accumulated force of the torsion spring 24. And further stop the rotation by contacting the locking portion 14c formed on the peripheral surface between them.

As described above, the latch 14 and the release lever 15 and the frame 12 supporting the release lever release holding mechanism 20 are composed of two frame pieces 12 as described above.
a and 12b, and these frame pieces 12
The latch 14, the release lever 15, and the release lever release / holding mechanism 20 are accommodated in a space formed by combining a and 12 b. The upper side is opened to the space formed by the frame 12 so that the latch 14 and the striker 30 on the skeleton side are engaged and disengaged. Further, a handle 15b for operating the release lever 15 projects out of an opening 12d cut out below the frame 12 so as to be operable. In the drawings, reference numerals 12e and 12e 'denote support shaft mounting holes for the latch, 12f a pivot shaft pin support hole for the release lever, and 12g a bolt hole for mounting to the bracket 11.

Next, the operation of the lock device according to the first embodiment will be described with reference to FIGS. First, when the front window 5 is pulled up to open the window, the handle 15b of the release lever 15 is pulled in the direction of arrow a in FIG. 4B, the locking end 15a is separated from the locking recess 14b of the latch 14, as shown in FIG.

By rotating the release lever 15, the striker 18 provided at the tip end of the release lever 15 is separated from the locking recess 21 a of the release lever latch 21. Then, when the release lever 15 contacts the stopper 19 and moves until the rotation is regulated, as shown in FIG. 4C, the striker 18 rotates the protrusion 22 tip 22a of the release lever latch 21. The state exceeds the radius R.

In the state shown in FIG. 4C, the latch 14 becomes completely free with respect to the release lever 15, and the latch 14 is returned by the return force of the attached torsion spring 17 (see FIG. 3). As shown in FIG. 5 (a), it turns clockwise in the figure (direction of arrow b). Release lever 1 at the same time
The locking end 15a of the latch 5 does not contact the peripheral surface between the locking recess 14b and the locking portion 14c of the latch 14 to relock the latch 14.

When the latch 14 rotates in the direction of the arrow b, the latching portion 14c on the outer periphery of the latch which has been separated up to that point is rotated in the opposite direction to the latch 14 by the restoring force of the torsion spring 24. The latching piece 23 at the end of the lever latch 21 is engaged, and the release lever latch 21 rotates back together with the latch 14. (FIG. 5 (b)
reference. )

The rotation of the latch 14 causes the striker 30 engaged with the locking notch 14a.
Is released from the locking cut 14a. Therefore, when an operation of pulling up the window frame 6 by holding the window opening / closing handles 8, 8 'for opening the front window 5 is added, the pulling operation force causes the latch as shown in FIG. 14
The latch 14 is positively rotated by applying a reaction force to the striker 30 which has been engaged with the locking notch 14a, and is eventually separated from the striker 30 (see FIG. 5D).
Can be retracted (pushed up) along the guide rail 4 and stored below the ceiling.

When the lock device 10 is unlocked as described above, the locking end 15a of the release lever 15 contacts the peripheral surface of the latch 14 as shown in FIG. The latch 14 and the release lever latch 21 are kept at a position disengaged from the locking recess 14b, and the balance is maintained with the locking piece 23 engaged with the locking portion 14c. You can keep your posture.

In order to close and lock the front window 5, the window frame 6 is locked in the locking position with respect to the latch 14 of the locking device 10 which is maintained in the released state (shown in FIG. 5D) as described above. To push the striker 3 in place.
0, the inner edge 14 of the opening of the locking notch 14a of the latch 14
a 'comes into contact and is pushed back by the striker 30 (see FIG. 5 (c)), and the latch 14 rotates in the opposite direction to the above to receive the striker 30 into the locking cutout 14a.

When this happens, the latching end 15a of the release lever 15 that has been in contact with the peripheral surface due to the reverse rotation of the latch 14
Is displaced to a position where the peripheral surface of the latch 14 is interrupted.
The release lever 15 is returned by the accumulating force of the torsion spring 17 ′ fitted and attached to the pivot shaft pin 16 of the release lever 15 and engages with the locking recess 14 b of the latch 14.
4 is locked by the release lever 15.

FIG. 6 is a partially cutaway front view of the lock device of the second embodiment. The lock device 10A of the second embodiment is generally the same as that of the first embodiment,
The shape of the release lever latch 21A in the release lever release holding mechanism 20A is different from the shape of the striker 18A attached to the release lever 15. Therefore,
The same components as those in the above embodiment are denoted by the same reference numerals, and detailed description is omitted.

The release lever release / holding mechanism 20A in the second embodiment is formed such that the locking recess 21a 'of the release lever latch 21A is deeper than in the previous embodiment. The protruding portion 22A that is connected in the shape of an elongated hook is formed. The locking piece 23 provided on the release lever latch 21 </ b> A is always in contact with the locking portion 14 c of the latch 14 so as to rotate together with the latch 14. The striker 18A provided at the distal end of the release lever 15 has a half-moon-shaped cross-section whose side facing the release lever latch 21A is cut. The other parts are the same as in the first embodiment.

In the lock device 10A according to the second embodiment, the operation of each part at the time of its operation is the same as described above. However, in the structure of the second embodiment, the locking recess 21a 'provided in the release lever latch 21A is formed deep, and the locking piece provided in the release lever latch 21A in the locked state of the latch 14 is provided. 23 is always in contact with the locking portion 14c of the latch 14, and the release lever latch 21A is also operated. Therefore, the striker 18A provided on the release lever 15 when the latch 14 is locked and the release lever latch 21A
Is maintained in a non-contact state, and there is no external force from the window frame 6 side, so that there is an advantage that it can withstand long-term use.

Next, a lock device 1B according to a third embodiment will be described. FIG. 7 is a partially cutaway front view of the lock device of the third embodiment, FIG. 8 is a sectional view taken along the line AA of FIG. 7, and FIG. 9 is an explanatory view of a release lever holding mechanism. .

The lock device 10B of the third embodiment is basically the same as the lock device 10 of the first embodiment, except that the release lever release / holding mechanism 20B is different. Therefore, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. Note that the same reference numerals are given to the latches that lock the opening and closing of the windows.

The latch 14 is formed with a locking notch 14a in the radial direction from the center of rotation, and two locking recesses 14b and 14d are formed at a position just opposite to the position where the locking notch 14a is formed and on the opposite side of the axis. Is provided. A torsion spring 17 is fitted on the support shaft 13 of the latch 14, and one end of the torsion spring 17 is engaged with the frame 12, and the other end of the latch 14 is engaged with a proper position of the latch 14. The rotational force is biased in the direction.

With respect to the latch 14 thus constructed, an upright surface (the window frame 6 in the figure) passing through the axis of the support shaft 13 is provided.
The release lever 15 is provided so that the axis of the pivot shaft pin 16 is positioned on a plane parallel to the axis. The release lever 15 is provided with a locking end 15a at the distal end from the pivot shaft pin 16.
When the locking end 15a is engaged with the first locking recess 14b formed in the latch 14, the latch 14
Is to be locked. Although not shown, the release lever 15 is provided with a torsion spring capable of returning after releasing the lock (similar to that of the first embodiment).

Further, the locking end 1 of the release lever 15
A striker 18 protrudes from the side surface near 5a in parallel with the pivot shaft pin 16, and is related to a release lever release holding mechanism 20B described later.

The release lever release / holding mechanism 20B has a base portion supported by a pivot shaft 25 provided in parallel with the support shaft 13 at a position lateral to the latch 14, and the lock claw piece 2 is rotatable.
6, a spring (not shown) for urging a rotational force for constantly rotating the lock claw piece 26 toward the support shaft 13 side of the latch 14 supports the main part of the lock device 10B.
2 is provided. As a means for attaching the spring (not shown), a torsion spring is fitted on the pivot 25,
Alternatively, it is attached by stretching a tension spring between a proper position of the lock claw piece 26 and a proper position of the frame 12.

As shown in FIG. 9, the lock claw piece 26 has a tip 26a which is sharpened so that the pivot shaft 2 of the base can be used.
The length L from the 5 axis to the tip 26a does not protrude into the rotation radius r at which the striker 18 attached to the release lever 15 rotates by the release operation, and the locking end of the release lever 15 When the latch 15a is engaged with the first locking recess 14b of the latch 14 and is in a locked state, the side surface of the tip 26a of the locking claw 26 is in contact with the striker 18. .

Also, the lock pawl 26 has a pivot 25
An operation pin 27 is protruded in parallel with the pivot shaft 25 at an intermediate position near the tip of the dimension as appropriate. This operation pin 27
Is normally brought into contact with the peripheral surface between the first locking recess 14b and the second locking recess 14d of the latch 14 so that the lock claw piece 26 can be controlled. Reference numeral 19 in the figure denotes a stopper that regulates the rotation range of the release lever 15.

Next, the operation of the lock device 10B according to the third embodiment will be described with reference to FIGS. First, when the front window 5 is pulled up to open the window, the operating portion 15 'of the release lever 15 is pulled in the direction of arrow a in FIG. 10A to release the lock of the lock device 10B. Is rotated about the pivot shaft pin 16 as a fulcrum, and FIG.
As shown in (b), the locking end 15a is
From the locking recess 14b.

When the release lever 15 is rotated, the striker 18 provided on the distal end of the release lever 15 comes into contact with the side surface of the distal end of the lock claw 26, and the return is urged by the lock claw 26. The lever is pushed back against the spring force of
9 until the rotation is restricted by the stopper 19, the rotation radius L of the tip 26a of the lock claw piece 26 pushing back the side surface of the striker 18 immediately before the restriction by the stopper 19 (the rotation radius L of the base pivot shaft 25). The striker 18 is in contact with the outer side surface of the lock claw piece 22 beyond the length from the axis to the tip (see FIG. 10C). As a result, the release lever 15 is held by the lock claw piece 26, and the latch 14 can be set free.

In this manner, the latch 14 is released from the locked state (unlocked), and the return force of the biased torsion spring 17 (see FIG. 8) as shown in FIG. 11 (a). It is rotated in the direction of arrow b. At the same time, the operation pin 27 attached to the lock claw piece 26 contacts the outer peripheral surface of the adjacent portion of the latch 14.

The released latch 14 is an operating force for holding the window opening handles 8 and 8 'to open the front window 5 and pulling the window frame 6 forward to pull up the window frame 6, as shown in FIG. 11B. As shown, the striker 30 engaged with the latch cut 14a of the latch is positively rotated by taking a reaction force, and is eventually separated from the striker 30 (FIG. 11).
(Refer to (c).) The window frame 6 can be retracted (pushed up) to the lower side of the ceiling along the guide rail 4 and stored.

The latch 14 thus released
When the first locking recess 14b is rotated by an appropriate amount from the position of engagement with the locking end 15a of the release lever 15 as the lever rotates, the locking claw piece of the release lever release and holding mechanism 20B is first released. 26, the operation pin 27 attached to the lock claw piece 26, which has been in contact with the latch peripheral surface when the release lever 15 is fixed at the release operation position by the release lever 15,
It is pushed out by the protruding portion 14e of the peripheral surface of the latch 14 adjacent to d. Then, this time, the tip 2 of the lock claw piece 26 with respect to the striker 18 at the tip of the release lever 15
6a pushes off striker 18 and striker 1
8 is returned to the latch 14 side again. As a result, release lever 1
As shown in FIG. 11 (b), the locking end 15 a of FIG. 5 comes into contact with the peripheral surface of the latch 14.

Therefore, the locking notch 14 of the latch 14
a is disengaged from the striker 30 and the locking device 10
When B is completely released, the latch 14 pivots clockwise in the drawing by the returning force of the biased torsion spring 17 and the locking end of the release lever 15 which is in contact with the latch peripheral surface. Part 1
The rotation is stopped by the engagement between 5a and the second locking recess 14d, and is held as it is (see FIG. 11C).

In this manner, the notch 14a of the latch 14
When the window is opened in the receiving direction of the striker 30 and the window is closed next time, it is held in a state where it can be quickly engaged with the striker 30. When the window is closed, the lock device 1 is closed.
When the window frame 6 is locked by operating 0B, since the latch 14 operates in the opposite direction to the unlocking operation described above,
The release lever 15 does not need to be operated from the outside at all, and does not affect the locking operation.

In the locking device 10B thus configured,
A release lever release / holding mechanism different from those of the first and second embodiments is provided to facilitate the release operation of the latch 14 by the release lever 15.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a cab for a construction machine to which a lock device according to an embodiment is attached.

FIG. 2 is a front view of the lock device according to the first embodiment, in which main parts are cut away.

FIG. 3 is an exploded perspective view of the lock device shown in FIG. 2;

FIG. 4 is an operation explanatory view (1) of a lock release lever release holding mechanism.

FIG. 5 is an operation explanatory view (2) of the lock release lever release holding mechanism.

FIG. 6 is a partially cutaway front view of the lock device of the second embodiment.

FIG. 7 is a partially cutaway front view of a lock device according to a third embodiment.

FIG. 8 is a sectional view taken along the line AA of FIG. 7;

FIG. 9 is an explanatory diagram of a lock release lever release holding mechanism.

FIG. 10 is an operation explanatory view (1) of the lock release lever release holding mechanism.

FIG. 11 is an operation explanatory view (2) of the lock release lever release holding mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cab main body 2 Front pillar 4 Guide rail 5 Front window 6 Window frame 7 Guide roller 10, 10A, 10B Lock device 11 Bracket 12 Frame 13 Latch support shaft 14 Latch 14a Lock notch 14b, 14b, 14d Lock recess 14c Locking portion 14e Latch protrusion 15 Release lever 15a Locking end 16 Pivot shaft pin 17, 17 ', 24 Torsion spring 18, 18A Striker 19 Stopper 20, 20A, 20B Release lever release holding mechanism 21, 21A Release lever Latch for latch 22 Latch protrusion 22a Tip of protrusion 23 Locking piece 25 Pivot shaft of lock claw piece 26 Lock claw piece 26a Tip of lock claw piece 27 Operation pin 30 Striker

 ──────────────────────────────────────────────────の Continued on front page (72) Inventor Hiroyuki Shioji 3-1-1, Ueno, Hirakata-shi, Osaka F-term in Komatsu Ltd. Osaka Plant (reference) 2D015 EA03 2E250 AA21 HH06 JJ00 LL17 PP04 PP05 PP10 QQ03 3D127 AA09 AA19 BB06 CB02 CC02 DF02 DF15

Claims (5)

[Claims] 1. A lock device comprising a pivotable latch and a release lever for restricting rotation of the latch in a release direction, wherein the release lever engages with the release lever at a lock release position by the release lever to release the latch. A driver's cab window locking device, comprising a release lever release / holding mechanism for holding, wherein the release lever release / holding mechanism is configured to release the release lever when the latch rotates by a required rotation angle. A release lever latch supported on a support shaft of the latch and configured to rotate together only when the latch is rotated in a release direction; and a release lever. The driver's cab window lock device according to claim 1, further comprising a release lever holding striker provided adjacent to the locking end of the driver, and a spring for urging the release latch to rotate in the return direction. . 3. A tip end portion of the release lever latch connected to a striker receiving portion of the release lever, the striker of the release lever is located within a rotation radius of the tip end of the release lever in a latched state by the release lever. 3. The cab window locking device according to claim 2, wherein when the release lever is displaced to a position where the latch is unlocked, the release lever is moved beyond the claw tip. 4. A lock claw, wherein said release lever release / holding mechanism is provided with a base portion pivotally supported near a latching side of said latch by a release lever, with a distal end directed toward the distal end of said release lever. And an operation piece attached to the lock claw piece and operating on the lock claw piece by rotating the latch in contact with the outer periphery adjacent to the locking portion of the latch release lever, and constantly latching the lock claw piece A spring for urging the lever to move in the direction of the rotation axis of the release lever, and a striker protruding from the outer surface of the latch engagement end of the release lever is operated by the lock claw piece. The cab window lock device according to claim 1. 5. The striker position provided with the release lever is located within a radius of rotation up to the tip of the lock claw in the latched state, and when displaced to a position where the latch is unlocked, the lock claw is moved. 5. The cab window locking device of claim 4, wherein the cab window locking device is in a relationship beyond the tip.