JP2000291323A - Structure of pull-up opening type window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a window closed or store and hold the window rationally at a window closing position and an upper side window storing position by providing a crosswise rotary type latch mechanism to a window frame in pull-up opening type window. SOLUTION: This pull-up opening type window is stored with the attitude of a window frame 6 which can move guided by a pair of guide rails arranged crosswise on a support structure body changed from that in an upright position to that in a horizontal position by moving the window frame 6 upward. In this pull-up opening type window, lock mechanisms 10 are provided with movable latched 13, whose locking notches are turned in two directions at specified angles, and releasing levers 15 for restricting and releasing the turning of the latches 13 at positions on the outer side than the window frame 6 and inner and lower side than the guide rails 4 in both upper end sections of the window frame 6. Strikers 20 and 22 which hold the window frame 6 engaged with the locking notches of the latches 13 at a position on the upper section of the upright position of the window frame 6 and the terminal section of storing and holding position are arranged in a support structure body in parallel with the turning axis lines of the latches 13 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a pull-up opening type window such as a front window which can be opened by a pulling operation provided on a cab of a construction machine.

[0002]

2. Description of the Related Art For example, a front window of a cab of a construction machine is provided with a front window which can be opened in order to confirm a working state when performing a forward working. Generally, the front window which can be opened is once pulled toward the inside of the cab and then pulled upward to be moved to the ceiling side in the cab to be stored therein.

[0003] The front window thus constructed is normally fixed to the front side of the cab so as to prevent rainwater and dust from entering the room from the outside, and when opened, it is necessary to be able to maintain a stable state in the storage position. . For this purpose, conventionally, in this type of front window, a latch type locking mechanism that engages with a locking hole provided in a front pillar or the like of a cab is provided at both upper end portions of the window frame, and the window is provided with a locking mechanism. At the time of opening and closing, a lock is released or locked by removing and inserting a latch (lock pin) of the lock mechanism. An example of such a configuration is disclosed in Japanese Patent Application Laid-Open No. 10-311061. In this prior art, when the window frame is moved to the storage position, the holding lever is automatically engaged with the roller shaft at the end portion, and the window frame is held so as not to return from the storage position. A holding mechanism is provided.

[0004]

However, in this prior art (disclosed in Japanese Patent Application Laid-Open No. 10-311061), the lock mechanism at the fixed position of the front window and the holding mechanism at the storage position are different in structure. Must be provided separately. The reason is that the locking or position holding direction is completely different. Therefore, the operation for locking or unlocking is also a separate operation.In addition, in the case of the latch type locking mechanism, the lock pin must be inserted and aligned with the lock hole, and the lock pin must be There is a problem that operability is poor because an operation of rotating and stopping is required.

Further, a lock pin and a pin hole (lock hole)
It is necessary to provide a gap between the hole diameter and the pin diameter to facilitate insertion, so that the front window frame rattles due to vibration and generates noise, There is a problem that the pin holes are worn and the vibration becomes larger.

In view of the above, the structure (cab body) is rotated by rotating the latch instead of the above-described latch type locking mechanism.
Japanese Patent Application Laid-Open No. 10-311062 proposes to employ a lock mechanism of a type that engages with a striker fixed to the side. In this lock mechanism, a plate member provided with two engagement grooves via a bracket on a frame side of a window to be moved is attached to a striker formed in a U-shape and fixed to a cab body side. When these plate members are unlocked by a single release lever, they are engaged with each other by the force of the attached torsion spring. When the groove is opened toward the striker and the striker is bitten and received in the engagement groove, the engagement groove and the striker are locked in an engaged state. To release the lock, a release lever is used. Describes that the two plate members are rotated in the opposite direction to the engagement state to release the lock.

However, in the lock mechanism of this latch structure, the structure is such that a plate member having two engagement grooves is provided so as to face up and down, and at the same time, the engagement grooves can be cooperatively opened and closed. However, there is a problem that a complicated structure is required. In addition, this method is effective only for locking in a posture in which the window stands up, and there is a problem that when the posture is changed, stability is lacking.

Further, as a lock mechanism for locking the movable body between a fixed position and a moved position by one latch, a lock mechanism for a sliding door is disclosed in Japanese Patent Laid-Open Publication No. Hei 8
No. 3,122,220. This slide door uses a combination of a rotatable lock plate provided with lock grooves (cuts) in two different directions and a lock release lever for restricting the rotation of the lock plate. When opening and closing the door, operating the handle unlocks the lock plate by the lock release lever, and the lock groove of the lock plate engaged with the lock piece is released with the movement of the door, and then the door slides to the slide end position. When the lock groove is reached, the lock groove is engaged with the lock piece at this position and locked.

The mechanism of the lock plate in the prior art is as follows.
Although it is effective in that it can act in two directions, the window frames that move by changing the posture from the vertical direction to the horizontal direction using one such latch (lock plate) at the end of their movement To lock or hold
There is a problem with the configuration described in the above publication. That is, when changing the posture of the target window frame from the standing state to the horizontal direction from the upright position, it is necessary to lock the window frame in the upright position by pressing the window frame against the support structure at the periphery of the window portion. A different function is required in the retracted position on the upper side, in which it is necessary to keep it from going down due to gravity and to keep it from returning. Therefore, there is a problem that it is difficult to divert the latch mechanism described in the prior art as it is.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and one of left and right latch mechanisms is attached to a window frame of a pull-up opening type window so that a window closing position and an upper storage position can be provided. It is an object of the present invention to provide a structure of a pull-up / open window which can be fixed or stored and held reasonably.

[0011]

In order to achieve the above-mentioned object, the structure of the pull-open window according to the present invention is guided by a pair of left and right guide rails attached to a support structure. If the movable window frame is moved upward from the upright closed window position, it is a pull-up open window that is stored by changing its posture in a direction intersecting with the upright closed window position, and includes upper ends of the window frame. A rotatable latch provided at a position outside the window frame and below the guide rail at a position where the locking notch is displaced by a required rotation angle in two directions, and rotation of the latch. A lock mechanism having a lever for restricting and releasing the lock is provided, and a striker that engages with the latch cutout to hold the window frame is provided at the upper part of the window frame standing position and at the end of the storage position. Flat on the axis of rotation of the latch And it is characterized in that it is arranged respectively on the support structure by.

[0012] The structure of the pull-up opening type window of the present invention configured as described above is related to the rotatable latch of the lock mechanism provided at the upper both ends of the window frame in two directions so that the locking directions are different. In the locking position in the closed state or the storage position after being moved to the upper side after the window is opened, the locking notch is provided, and the engagement direction between the striker provided in the support structure and the locking notch of the latch is set to the window. Since the window frame can be fixed at each position by directly changing the window frame according to the change in the posture of the frame, it is possible to obtain an effect that one latch can securely and securely fix the window frame even though the window frame holding state is different. . Further, since the lock mechanism can have a simple structure including one rotatable latch and a lever for restricting (locking) and releasing the rotation of the latch,
There is an advantage that there is no problem even when the storage space is reduced and the storage is performed by pulling the storage device upward from the standing state.

The latch is provided with a locking notch for engaging and locking a projecting striker fixedly supported by the support structure above the rotation support shaft when the window is closed, and a support structure at that position when the window is retracted. It is preferable to provide a locking notch for engaging and holding the striker fixedly supported by the body and projecting below the rotation support shaft. And
The latch notch of the latch may be radially open.

[0014] With this configuration, when the window frame is moved so as to be pressed toward the front side for closing the window at the window closing position, one of the latch notches is engaged with the striker at the position. This makes it possible to assemble the latch and the lever of the releasing means in the vicinity of the window frame, so that it is structurally low in volume. In addition, the latch notches are provided so as to open radially at two points, and the position of the striker is located above the rotation support shaft of the latch at the window closing position, and the position of the striker is at the storage position. When the window frame is pulled up and moved to the storage position after the window is opened by positioning the position below the rotation support shaft of the latch, the other locking notch of the latch allows the striker in the storage position without additional operation. And can be locked. Therefore, if the window frame is pulled up and moved to the storage position as it is, the window frame is automatically locked, and the effect of improving workability is exhibited.

It is preferable that an end of the opening of the latch notch forming portion of the latch is formed to be longer than a holding side end of the striker. This makes it possible to stably hold the striker in the locked state.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of the structure of the pull-up window according to the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a cab for construction equipment having the structure of a pull-up window according to the present embodiment, FIG. 2 is a longitudinal sectional view of the cab, and FIG. 4 is a view showing a main part of the lock mechanism, FIG. 5 is a VV view of FIG. 3, and FIG. 6 is an enlarged sectional view of VI-VI of FIG. ing.

In this embodiment, as shown in the drawings, a description will be given of a cab used for a construction machine as a front window. The cab body 1 is provided with a pair of guide rails 4, 4 on the indoor side from front pillars 2, 2 (corresponding to the support structure of the present invention) located on the front side thereof to ceiling side portions 3, 3. , These guide rails 4, 4
The front window 5 is provided movably along the. On both sides of the window frame 6 of the front window 5, guide rollers 7 are provided at upper and lower portions, respectively, so as to be rotatable by support shafts projecting sideways from the window frame 6, and these guide rollers 7 are arranged along the guide rails 4 along the guide rails 4. To be moved. In addition, window frame 6
Window opening / closing handles 8, 8 'to be gripped when the window frame is moved are provided integrally with the lower and upper portions of the window frame, respectively.

The guide rails 4, 4 provided on the cab body 1 have lower ends 4a at the front pillars 2a.
And a branch portion 4b that projects forward from a portion 4c that curves toward the ceiling side of the cab body 1 at the front upper position. I have.

The front window 5 is fixedly attached to a glass 6a by a plurality of attachment members (not shown) provided at required intervals on a front side of a window frame 6 having a well-known structure. In the window closing position, the lower guide roller 7 is received by the lower end 4 a of the guide rail 4, and the upper guide roller 7 is moved forward along the branch portion 4 b of the guide rail 4 to move toward the front pillar 2, 2. When pressed, the periphery of the front surface of the glass 6a comes into contact with a sealing member provided on the cab body 1 side so as to be kept watertight.

On the upper portion of the front window 5 on the indoor side, lock mechanisms 10, 10 are mounted on the left and right sides of the front window 5, respectively, with the operating portion (latch) positioned outside and attached to the window frame 6. ing.

Since the lock mechanisms 10, 10 are provided symmetrically, only one of them will be described. First, a bracket 11 projecting inward from the upper part of the window frame 6 in a direction orthogonal to the window glass 6a, and a support shaft pin attached to the bracket 11 and projecting outward in parallel with the window glass 6a. A latch 13 rotatable on the cab body 12, a striker 20 protruding from the cab body 1 side in parallel with the window glass 6 a, and a release lever 15 for releasing a locked state by engagement of the latch 13 with the striker 20. Combination of

As shown in FIG. 4 (representing a right side as viewed from the driver's seat), the latches 13 have locking cuts 13a, 13b in the radial direction from the center of rotation of approximately 90 °.
Are formed at two positions where the rotation angle is displaced, and the bottom of each locking notch 13a, 13b is made semicircular, and the opening ends 13c, 13d and 13e, 13f on the opening side.
Are formed in an arc shape, and opening ends 13d and 13f on the receiving rear side of the striker 20 described later are formed slightly longer than opening ends 13c and 13e on the opposite side. The locking recesses 14 and 1 are formed in the peripheral edge of the opposite side of the rotation center from the formation portions of the locking notches 13a and 13b.
4 'are provided.

The axis of the pivot pin 16 is positioned on an upright surface passing through the axis of the support shaft 12 that rotatably supports the latch 13 so that the axis of the pivot pin 16 is opposite to the striker engaging portion at the window closing position. A release lever 15 is provided, and the distal end 15a of the release lever 15 is engaged with the locking recesses 14, 14 'of the latch 13.
, The rotation of the latch 13 can be restricted. Although not shown, a torsion spring is fitted on the pivot pin 16 of the release lever 15, one end of which is connected to the stationary member side, and the other end is connected to an appropriate position of the release lever 15. It is better to be able to return.

As shown in FIG. 5, such a latch 13 is supported on the support shaft 12 so as to be located just below the position where the guide rail 4 of the window frame 6 is disposed,
The latch 13 is provided with a torsion spring 17 which is fitted to the support shaft 12, one end of which is locked to the bracket 11 side and the other end of which is connected in place. A restoring force is provided. The above-described latch 13 and release lever 15 are supported and surrounded and protected by a frame 18 which also functions as a divisible cover. Reference numeral 19 in the drawing denotes a stopper for the release lever 15.

Further, on the inside of the ceiling side of the cab body 1,
As shown in FIG. 6, near the end of the guide rail 4, the striker 22 is located at a lower position of the guide rail 4.
Are protruded inward in a horizontal state in the width direction by a mounting bracket 23 mounted on the cab body 1. The projecting position of the striker 22 is determined by the other locking notch 13b of the latch 13 of the lock mechanism 10 which is mounted on the window frame 6 when the window frame 6 guided by the guide rail 4 moves to the storage position end. It is arranged to engage.

The operation of opening and closing the front window 5 of the embodiment constructed as described above will be described with reference to FIGS. In addition,
These figures are shown as viewed from the side opposite to the window-side cross section shown in FIG.

First, in order to open the window, the lock mechanisms 10, 1 are used.
If each release lever 15 is operated and moved in the direction of arrow a (arrow a in FIG. 3) in the state shown in FIG. 7A, the release lever 15 rotates around the pivot pin 16. Then, the tip 15a is separated from the locking recess 14 of the latch 13 (see FIG. 7B). The release lever 15
The rotation range is regulated by the rotation stopper 19 provided on the frame 18 and does not rotate more than necessary.

Then, the latch 13 is rotated by the return force of the torsion spring 17 provided on the support shaft 12 and acts to move toward the front side by taking a reaction force on the striker 20. As a result, as shown in FIG.
3, the locking notch 13a is rotated and displaced away from the engaged striker 20, and when the engagement is released, the upper portion of the window frame 6 to which the lock mechanism 10 is attached can be retracted to release the fixing. Will be done. At this point, the distal end 15a of the release lever 15 is engaged with the other locking recess 14 'of the latch 13, and is held at that position while preventing rotation.

When the fixing of the window frame 6 by the lock mechanism 10 is released in this manner, the window frame 6 is supported by the guide roller 7 located below the window frame 6 being fitted into the lower end 4a of the guide rail 4 (see FIG. 1). 3), the upper part can be turned indoors with the lower guide roller 7 as a fulcrum. In this way, as shown in FIG.
Is the cut 13a from the striker 20 at the window closing position A.
However, she escapes and can retreat greatly. Therefore, the operator operates the lower window opening handle 8 ′ and the upper window opening handle 8 ′ of the window frame 6.
, The upper guide roller 7 moves from the branch portion 4b of the guide rail 4 to the curved portion 4c, and can be pulled upward as it is. .

When the window frame 6 is pulled up in this manner, the window frame 6 can be moved at once from the front surface of the cab body 1 to the ceiling by the guide rails 7, 7 being guided by the guide rails 4 at the upper and lower positions. When the window frame 6 reaches the storage position, the latch 13
However, as shown in FIG.
b is moved with its opening facing the striker 22 provided at that position.

When the open end 13f of the latch cut 13b of the latch 13 comes into contact with the striker 22, the open end 1f
The latch 13 is guided by the arc surface of 3f and the striker 22 rotates the latch 13 in the direction of arrow b, and at the same time, the distal end 15a of the release lever 15 is separated from the latching recess 14 'of the latch 13 (FIG. 9 (b) )reference). Eventually, when the window frame 6 reaches the storage end position, as shown in FIG. 9C, the latch 13 receives the striker 22 in the locking notch 13b, and the distal end 15a of the release lever 15
Engages with the locking recess 14 and is locked at that position.

In this manner, the window frame 6 is locked by the lock mechanism 10 in the storage position, so that even if the cab body 1 receives vibration from the outside, the window frame 6 does not slide forward, so that the cab body 1 can be safely and securely stored in the storage position. Will be retained.

In order to close the front window 5 which has been pulled up and opened as described above, the window frame can be lowered and the opened window can be closed by operating in the reverse of the opening operation.
That is, in order to lower the window frame 6, when the handle of the release lever 15 is pulled downward from the state shown in FIG. 9C by the lock mechanisms 10, 10 of the window frame 6 locked in the storage position, Using the pivot pin 16 as a fulcrum, the tip 15
a is disengaged from the locking recess 14 of the latch 13, and the latch 13 is released.

Accordingly, since the window frame 6 can be freely moved, if the window frame 6 is moved along the guide rail by grasping the window opening / closing handles 8, 8 ', the latch 13 of the lock mechanism 10 becomes free. Therefore, when the torsion spring 17 is pulled away from the striker 22, the torsion spring 17 is reversely rotated by the return force, and the distal end 15a of the release lever 15 is again engaged with the locking recess 14 ', and the latch 13 is moved. The window frame 6 can be returned to the original position in the state shown in FIG.

When the window frame 6 is returned to the front surface of the cab body 1 in this manner, the guide roller 7 located below the window frame 6 of the front window 5 is fitted into the lower end 4a of the guide rail 4 and the posture is adjusted. When the upper part of the window frame 6 is pressed forward, the upper guide roller 7 is turned to the branch part 4b of the guide rail.
To the closed position. Immediately before moving to the window closing position, the lock mechanism 10 is in an upright state together with the window frame 6, and the locking cut 13a of the latch 13 is directed toward the striker 20 at that position as shown in FIG. The opening posture is maintained.

Therefore, if the window frame 6 is pressed forward with the upper window opening / closing handle 8 as shown in FIG.
As shown in the figure, the opening end 13 of the locking notch 13a opening the latch 13 comes into contact with the striker 20, and the window frame 6
With the forward movement of the latch 13, the latch 13 is rotated in the reverse direction, and the striker 20 is eventually received in the locking notch 13a to reach the window closing position, and at the same time, as shown in FIG. Inside the striker 20
Is perfectly acceptable. During this time, the release lever 15 has its distal end 15a separated from the position of the locking recess 14 'and engages with the other locking recess 14, and at the same time, the torsion spring 17 added to the latch 13 resists the return force. When the latch 13 is turned, the locking force of the distal end portion 15a of the release lever 15 that is engaged with the locking recess 14 is retained by the stored force of the torsion spring 17, and the rotation of the latch 13 is performed. The movement is locked. In other words, the latch 13 is locked, and the front window 5 is fixed to the window.

When the front window 5 is opened and closed in this manner, the locking mechanism 10 attached to the window frame 6 engages the rotating notch 13 with the locking notch 13a which engages with the striker 20 at the window closing position. Since the locking cut 13b with the striker 22 at the storage position is provided with a predetermined rotation angle displacement, the engagement position is automatically changed as the posture of the window frame 6 moves from the standing state to the lying state. By changing the engaging position between the tip 15a of the release lever 15 and the locking recess 14 or 14 'on the latch 13 side at the same time, the striker 20 or 22 can be operated at each position, and each time the striker 20 or 22 can be operated from outside. 13a or 13b without locking
Can be engaged, the operator can open and close the front window 5 by moving the window frame 6 only by releasing the latch 13 and the striker 20 or 22 by the release lever 15. Alternatively, the window frame can be securely fixed at the storage position.

In the process in which the locking notch 13a or 13b of the latch 13 engages with the striker 20 or 22 and locks, the open end which comes into contact with any of the locking notches in the initial stage of contact. Since the portion 13d or 13f is slightly longer than the opposite open end 13c or 13e, it is possible to easily receive the striker 20 (22) and to perform the function of securely engaging the striker 20 (22).

Further, since the latch 13 and the striker 20 or 22 are related so that the striker 20 is located on the upper side in the window closing position, the upper part of the window frame can be pressed forward and locked without difficulty. Since the striker presses the latch downward, vibration of the window frame can be suppressed. In the storage position, the striker 22 is related so as to be located on the lower side, so that the locking portion locks the window frame 6 in the storage position in the storage position, so that the locking portion is not affected by vibration or the like. There is no departure and safety can be maintained.

Although the description has been given above of the window attached to the cab of the construction machine, according to the gist of the present invention, the window can be adopted as a pull-up opening type window of a house or the like. Since it has a low-profile structure and is easy to handle, it can be said that it is convenient to pull up the window frame and store it without discomfort.

The release lever 15 in this embodiment corresponds to the release lever of the present invention.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a cab for a construction machine having a pull-up window structure according to the present embodiment.

FIG. 2 is a longitudinal sectional view of a cab.

FIG. 3 is a side sectional view of a main part of the window, which is partially omitted.

FIG. 4 is a diagram illustrating a main part of a lock mechanism.

FIG. 5 is a view along VV in FIG. 3;

FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. 2;

FIGS. 7A and 7B are explanatory diagrams of an operation mode in the lock mechanism of the window frame according to the present embodiment. FIG.
(B) shows a state in which the latch is unlocked by operating the release lever.

8A and 8B are explanatory diagrams of an operation mode in the lock mechanism of the window frame according to the present embodiment, wherein FIG. 8A illustrates a mode immediately before the latch is released from the striker, and FIG. Respectively are shown in a state in which can be pulled up.

FIGS. 9A and 9B are explanatory diagrams of an operation mode in the lock mechanism of the window frame according to the present embodiment. FIG. 9A illustrates a mode before the window frame is moved to the storage position and locked, and FIG. (C) shows the locked state at the storage position, respectively, just before the latch contacts and is locked.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cab body 2 Front pillar 3 Ceiling side 4 Guide rail 4a Lower end of guide rail 4b Branch of guide rail 5 Front window 6 Window frame 7 Guide roller 8, 8 'Handle for opening / closing window 10 Lock mechanism 11 Bracket 12 Latch Support shaft 13 Latch 13a, 13b Locking cut 13c, 13d, 13e, 13f Opening end of locking cut 14, 14 'Locking recess 15 Release lever 15a Tip of release lever 16 Pivot pin 17 Torsion spring 18 Frame 20,22 striker

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E05B 65/19 E05B 65/19 R (72) Inventor Hiroyuki Shioji 3-1-1 Ueno 3-chome, Hirakata-shi, Osaka F term (reference) in Komatsu Ltd. Osaka factory 2D015 EA03 2E250 AA21 HH06 KK01 LL00 PP04 PP05 PP10 3D127 AA01 AA09 AA19 BB02 CB03 CB07 CC02 DF02 DF15

Claims (4)

[Claims] When a movable window frame guided by a pair of left and right guide rails attached to a support structure is moved upward from an upright fixed position, the posture is changed in a direction intersecting the fixed position. A retractable open window to be stored, at the upper end portions of the window frame, in the width direction outside the window frame and inside the guide rail, at a position where the locking cut is displaced by a required angle. A lock mechanism including a rotatable latch provided at two locations and a lever for restricting and releasing the rotation of the latch is provided, and at the top of the window frame standing position and at the end of the storage position, A structure of a pull-up open window, wherein strikers for engaging the latch notches of the latch and holding the window frame are provided on the support structure in parallel with the rotation axis of the latch. 2. The latch according to claim 1, wherein said latch is provided with a locking notch which can be locked by engaging a protruding striker fixedly supported by a support structure above the rotation support shaft when the window is closed, and a support structure at the position when the window is retracted. 2. The structure of a pull-up window according to claim 1, further comprising a locking notch capable of engaging and holding a striker fixedly supported by the body and projecting below the rotation support shaft. 3. The structure of claim 1, wherein the latch cutout of the latch is opened radially. 4. The pull-up release according to claim 1, wherein an end of the opening in the latch cutout forming portion of the latch is formed to be longer than a holding-side end. Type window structure.