JP2858996B2 - Window lock device for construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window lock device for a construction machine (hereinafter simply referred to as a lock device). More particularly, the present invention relates to a locking device for locking and sealing a front window of a cabin of a construction machine in a closed position.

[0002]

2. Description of the Related Art FIG. 7 shows a power shovel as an example of a construction machine to which a lock device according to the present invention is applied. Reference numeral 100 denotes a cabin, on the front of which a window frame F is provided. A window W is attached to the window frame F. As shown in FIG. 8, the window W is configured to be movable between a closed position I on the front surface of the cabin 100 and an open position (storage position) III on the inner surface of the cabin ceiling. In the closed position, the window W is configured to be slightly inclined backward from the vertical, and the upper end side slightly swings about the lower end side (between I and II in FIG. 8). Exists.

Conventionally, the opening and closing of the window W is all performed manually, and the lock and the seal are also manually operated. The lock and seal lock the window W in FIG.
Then, the window is pressed against the window frame and fixed by rotating the manual cam as in the case of the casement window of a general building.

[0004] However, it is quite troublesome for a driver to perform the above-mentioned manual work. Recently, the present applicants have proposed that the window is automatically opened and closed by a control cable and a driving device thereof (Japanese Patent Application Nos. 2-14633 and 2-210708). We continue to develop for.

A lock device using a catch, similar to a door lock of an automobile, is used as the automatic window opening / closing device. In this device, the catch abutting on the window is rotated by the force of the window closing operation to restrain the window. In order to release the restraint of the window, a solenoid actuator or a manual lever for rotating the catch in the reverse direction is provided.

[0006]

The locking device using the catch originally locks the window at a predetermined position on the window frame.
It is for holding. However, when used in an automatic opening / closing device, a sealing function is provided at the holding position at the same time, and the steps of the opening / closing operation including the operations of locking and unlocking the lock and unlocking and releasing the seal are automated. For this reason, the lock device adjusts the stroke of the drive unit to match the swing stroke of the upper end of the window (between I and II in FIG. 8), and at the same time, attaches the seal device to the seal position (the position II in FIG. 8) that fluctuates due to the cabin installation. It is necessary to perform two adjustments, that is, fixed adjustment, at the same time, and the adjustment takes a very long time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can easily cope with fluctuations in the swing width of a window in a closed position, and can be easily linked to automatic opening and closing of the window. It is an object to provide a locking device.

[0008]

SUMMARY OF THE INVENTION A front window of a cabin of a construction machine according to the present invention, which is opened and closed between a closed position on a front surface provided with a sealing member and an open position on a ceiling surface of a cabin, is closed in a closed position. A device for sealing and locking, comprising: a lock fitting provided at an upper end of a window; and an automatic pressing means attached to the cabin side, wherein the pressing means engages with the lock fitting. A member, a drive motor for driving the engagement member, and rotation of the drive motor, wherein the lock fitting of the engagement member closes the front window.
A conversion means for converting the movement into a direction of pressing against the stop position , wherein the engagement member does not engage with the lock fitting during the opening / closing operation between the open position and the closed position of the window. In the closed position of the lock fitting,
Further, the lock is moved in the direction of the window frame to press the window against the window frame, and when the opening operation is performed, the engagement with the lock metal is released when the closed state is reached from the pressed state on the window frame. It is configured.

The lock fitting has a hole for loosely connecting to a shaft at an upper end of the window, and an engagement shaft capable of engaging with the automatic pressing means, and the conversion means is driven by the drive motor. A screw rod rotated around its own axis,
A nut member, which is screwed to the threaded rod and guided so as to linearly move along the threaded rod with the rotation of the threaded rod, and the engaging member is closed with the linear movement. A cam plate that engages with the lock fitting in the closed position in the operation and moves so as to release the engagement in the closed position in the open operation, and the engaging member is perpendicular to the axis of the threaded rod. Preferably, the nut member is slidably fitted in the nut member and guided by the cam plate.

A second aspect of the window lock device for a construction machine according to the present invention is that the cabin of the construction machine is opened and closed between a closed position on a front surface provided with a sealing member and an open position on a ceiling surface of the cabin. A device for sealing and locking a window in a closed position, comprising: a lock fitting provided at an upper end of a window; and an automatic pressing means attached to the cabin side, wherein the lock fitting has a shaft at an upper end of the window. And a rack that meshes with the automatic pressing means is formed, and the automatic pressing means is provided so as to be located at the end of the rack of the lock fitting when the window is closed. A gear, and a drive motor for rotating the gear. The gear meshes with the rack and rotates, so that a lock fitting moves the closed position and the locked position. It is constructed between to be moved.

[0011]

When the window is closed and reaches the fully closed position, that is, when the window has completely descended to the front of the cabin, the pressing means engages with the lock fitting.
For example, in the lock device according to the second aspect, the engaging member of the pressing means descends and engages with the engaging shaft of the lock fitting, whereas in the locking device of the third aspect, the gear of the pressing means is the end of the rack of the lock fitting. Abut.

Then, the pressing means presses the window to the front window frame or the like provided with the seal member through the lock fitting,
Maintain that state. By doing so, the window is locked and sealed.

When the lock is released, the pressing means is operated so as to release the pressing. Then, in the closed position of the window, the engagement between the lock fitting and the pressing means is released, so that the window can be opened subsequently. In addition, by electrically interlocking the opening and closing operation of the window with the operation of the lock device in the closed position, the operation from the fully opened position to the locked position and the operation from the locked state to the fully opened position can be performed with one touch.

In general, the window in the closed position can swing about the lower end as an axis in a certain range. However, since the window in the closed position is pressed against the window frame by a mechanism completely independent of the window opening and closing mechanism, the stroke can be easily increased. It is possible to sufficiently cope with a change in the stroke up to the seal surface due to the magnitude of the swing width between the two, that is, the variation in the installation of the cabin window frame.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lock device according to the present invention.

FIG. 1 is a perspective view showing an embodiment of the first aspect of the lock device of the present invention, FIG. 2 is a sectional view showing a state in which the lock device of FIG. 1 is attached to a front window, and FIG. 4 is a partially cutaway front view of the lock device of FIG. 4, FIG.
FIG. 5 is an explanatory view showing the operation of the lock device of FIG. 1, and FIG. 6 is a front view showing one embodiment of the second aspect of the lock device of the present invention.

In FIG. 2, W is a window, which is opened and closed by being guided by a guide rail G attached to the cabin 100 side. The guide rail G includes an upper guide rail G1 along the ceiling of the cabin 100 and a lower guide rail G2 along the front of the cabin 100. The upper end of the window W is on the upper guide rail G1, and the lower end of the window W is on the lower side. Guided by guide rail G2. A pair of lock fittings 1 are connected to the upper end of the window W. In addition, a pair of pressing means 2 is provided on the back of the cabin, corresponding to the lock fitting 1. The lock device 1 and the pressing means 2 constitute a lock device 3.

As shown in FIG. 1, the lock fitting 1 includes a slide plate 4 that moves along the upper guide rail G1 with the window W, an engagement pin 5 fixed to the slide plate 4 and engaged with the pressing means. , Upper guide rail G1
And a guide roller 6 for smoothly moving the window. A long hole 7 vertically long is formed at one end of the slide plate 4. When the connecting shaft 8 protruding from the upper end of the window W penetrates into the long hole 7, the lock fitting 1
Is swingably connected to the

On the other hand, as shown in FIGS. 1 and 3 and 4, the pressing member 2 includes a cam plate 9, a screw rod 10, and a driving motor.
11, a nut member 12, a claw member 13, and a guide rod 14. The cam plate 9 is fixed to the cabin 100 side in parallel with the upper guide rail G1. The screw rod 10 is also supported by the cam plate 9 so as to be parallel to the upper guide rail G1 and to be rotatable around its own axis. The drive motor 11 is connected to the screw rod 10 via a coupling 15. The guide rod 14 is fixed to the cam plate 9 in parallel with and close to the screw rod 10. The nut member 12 is formed with a screw hole 16 screwed with the screw rod 10 and a guide hole 17 slidably fitted on the guide rod 14 (see FIG. 4). Therefore, the nut member 12 moves along the screw rod 10 and the guide rod 14 when the screw rod 10 is rotated by the drive motor 11 via the speed reducer (not shown).

A claw member 13 having an engagement claw 18 is slidably fitted outside the nut member 12. The sliding direction of the claw member 13 is a direction (vertical direction) perpendicular to the axis of the screw member 10 and the guide rod 14 toward the lock fitting 1, whereby the engaging claw 18 of the claw member 13 engages with the lock fitting 1. It can engage and disengage the pin 5. A guide pin 19 (see FIG. 4) protrudes from the claw member 13, and the guide pin 19 is engaged with a cam hole 20 (see FIGS. 3 and 4) of the cam plate 9. The cam hole 20 extends from the front side (front end) of the cabin 100 in parallel with the upper guide rail G1, and is inclined upward from the middle to the rear end.

Next, the operation of the lock device 3 configured as described above will be described with reference to FIG.

In FIG. 5, the window W1 during the closing operation is set to 2
The window W2 reaching the closed position is indicated by a solid line, and the locked window W3 is indicated by a broken line. Although three codes W1, W2, and W3 are respectively attached to the windows, they are all the same window, and the codes are changed in time series for convenience.

The window is opened and closed by a motor (not shown) separate from the drive motor 11 via a control cable (not shown). When the window W1 is in the closing operation, the nut member 12 and the claw member 13 are both located at the rear ends of their strokes (indicated by a two-dot chain line in the figure). That is, the guide pin 19 of the claw member 13 is in a state of contacting the rear end of the cam hole 20 (the state shown in FIG. 3), and the drive motor 11 is also stopped. When the window W2 reaches the closed position (indicated by a solid line in the figure), the screw rod 10 is rotated in electrical interlock, and the nut member 12 moves toward the front end (to the right in FIG. 4). Then, the claw member 13 moves obliquely downward while the guide pin 19 is guided by the cam hole 20, and the engagement claw 18 just engages with the engagement pin 5 (shown by a solid line in the figure). Screw rod 10 as it is
The claw member 13 moves the lock fitting 1 along the horizontal portion of the cam hole 20 (therefore, the upper end of the window) toward the front of the cabin 100, and moves the window W3 to the window frame F.
Press Then, the upper end of the window W is disengaged from the guide rail, and the periphery is pressed against the sealing member provided on the window frame F, so that the window W is locked and sealed.

FIG. 6 shows an embodiment of the lock device according to the second aspect of the present invention. The lock device 31 is composed of a lock fitting 32 connected to the upper end of the window W and a pressing means 33 fixed to the cabin 100, similarly to the lock device 3 of FIG. However, this embodiment is different from the above embodiment (FIG. 1) in that a rack and pinion mechanism is used.

As shown in FIG. 6, the lock fitting 32 is composed of a slide plate 35 having a long hole 34 for connecting with the window W at the front end side, as in FIG. It also has a guide roller 36 so as to be guided by the guide rail G1. However, it does not have an engagement pin, and teeth (hereinafter referred to as racks) 37 are engraved on the upper end side of the slide plate 35.

On the other hand, a pressing means 33 is provided with a gear 38 meshing with the rack 37 and a gear (not shown)
, And a drive motor 39 for rotationally driving the motor. The gear 38 is arranged to abut on the front end of the rack 37 when the window W reaches the closed position by the closing operation.

In the lock device 31 configured as described above, when the window W reaches the fully closed position, the gear 38 is electrically interlocked to rotate. Then, the upper end of the window W faces the window frame F via the lock fitting 32 (FIG. 6).
Is moved to the right), and the entire window W is pressed against the window frame F, so that the lock and the seal are performed.

[0028]

According to the lock device of the present invention, since the window is pressed against the window frame on the front surface of the cabin, locking and sealing can be performed simultaneously. In addition, the operation from the fully opened state to the locked state and the operation from the locked state to the fully opened state can be performed with one touch in conjunction with the opening and closing operation of the window. Further, locking and sealing can be performed without being affected by the size of the interval between the window closing position and the locking position.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a first aspect of a lock device of the present invention.

FIG. 2 is a cross-sectional view showing a state where the lock device of FIG. 1 is attached to a front window.

FIG. 3 is a partially cutaway front view of the lock device of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is an explanatory diagram showing an operation of the lock device of FIG. 1;

FIG. 6 is a front view showing an embodiment of the second aspect of the lock device of the present invention.

FIG. 7 is a perspective view showing an example of a construction machine to which the lock device of the present invention is applied.

FIG. 8 is an explanatory view showing an opening / closing operation of a front window of the construction machine shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Locking metal 2 Pressing means 3 Locking device 4 Slide plate 5 Engagement pin 7 Long hole 9 Cam plate 10 Screw rod 11 Drive motor 12 Nut member 13 Claw member 20 Cam hole 31 Locking device 32 Locking bracket 33 Pressing means 34 Long hole 37 Rack 38 Gear 39 Drive motor F Window frame W Window

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-169591 (JP, A) JP-A-63-61677 (JP, A) JP-A-4-11184 (JP, A) 34412 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60J 1/00

Claims (3)

(57) [Claims] 1. An apparatus for sealing and locking a front window of a construction machine cabin in a closed position between a front window, which is opened and closed, between a closed position on a front surface provided with a sealing member and an open position on a ceiling surface of the cabin. And a lock member provided at an upper end of the window, and an automatic pressing means attached to the cabin side, wherein the pressing means engages with the lock metal member, and the engaging member And a direction in which the lock fitting of the engaging member presses the front window to the closed position.
The engaging member does not engage with the lock fitting during the opening and closing operation between the open position and the closed position of the window, and locks at the closed position of the window at the time of the closing operation. The window is pressed against the window frame by moving the lock member in the direction of the window frame, and the window is pressed against the window frame during the opening operation. Window lock device of a construction machine configured to be unlocked. 2. The lock fitting has a hole for loosely connecting to a shaft at an upper end of the window, and an engaging shaft capable of engaging with the automatic pressing means. A screw rod rotated around its own axis by a motor, a nut member screwed to the screw rod, and guided so as to move linearly along the screw rod with the rotation of the screw rod;
The engaging member is engaged with the lock fitting at the closed position in the closing operation of the window, along with the linear movement,
And a cam plate for moving the engagement member to be released at the closed position in the opening operation, and the nut member is slidable in a direction perpendicular to the axis of the threaded rod. The lock device according to claim 1, wherein the lock device is fitted and guided by the cam plate. 3. A device for sealing and locking a front window of a construction machine cabin in a closed position, which is opened and closed between a closed position on a front surface provided with a sealing member and an open position on a ceiling surface of the cabin. And a lock fitting provided at an upper end of the window, and an automatic pressing means attached to the cabin side, wherein the lock fitting has an elongated hole loosely fitted to a shaft of the upper end of the window, and the automatic pressing means. And a gear that is provided so that the automatic pressing means is located at the end of the rack of the lock fitting in the window closed position, and a drive motor for rotating the gear. Wherein the gear is meshed with the rack and rotated so that the lock fitting can be moved between the closed position and the locked position. Window lock device for construction machinery.