JPH08270014A - Opening/closing structure of sash window of cab - Google Patents

Abstract

PURPOSE: To easily open or close a window glass, by providing a movable sash at the glass window in a cab or the like and installing a handle provided with a cam plate and pressing the movable frame with the rotation of handle to adjust the friction force. CONSTITUTION: The window glass 9 in the cab or the like of a construction vehicle is set so as to vertically slide between a fixed sash frame 11 and a movable sash frame 12 and a handle 15 provided with a cam plate 17 is rotatably fixed to the movable frame 12. When the window glass 9 is closed or opened by half, the handle 15 is rotated to the closing position (position A) and the movable frame 12 is transferred to the fixed frame 11 and fixed there. When the window is opened, the handle is rotated to the closure-releasing position (position B) and the window is opened by the knob 10 with a hand. In this case, the rotation of handle is adjusted and the friction force between the glass window and the sash frame is adjusted to prevent the glass plate 9 from falling abruptly due to the own weight. In this way, a window which has a simple structure and which is easily handled can be obtained in a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing structure for a sash window of a cab for a driver's cab, which is mainly mounted on construction machines such as hydraulic excavators and working vehicles.

[0002]

2. Description of the Related Art FIG. 9 is a cross-sectional view of a main part showing a sash window 1 of a conventional cab described in Japanese Utility Model Laid-Open No. 7-4119. When opening the closed sash window 1 shown in FIG. 9, the knob 3 of the locking tool 2 is operated inward (in the direction of arrow a). The locking portion 4 of the locking tool 2 is disengaged from the lower end edge of the glass plate 5, but the sash frame 6 extends to a position a below the locked lower end edge by a dimension L. It is a straight line. Therefore, since the glass plate 5 descends due to its own weight, the sash window 1 can be opened.

[0003]

In the conventional opening / closing structure shown in FIG. 9, when the knob 3 is pulled inward, the glass plate 5 is naturally dropped by the dimension L. Therefore, the glass plate 5 is stopped at a desired position on the way. I couldn't keep it. For that reason, when it was desired to keep the glass plate 5 slightly open, it could not be done, and the ventilation was unsatisfactory. There are power window regulators and manual regulator handles (not shown) that are generally found in automobiles, but the power window regulator is expensive.
Also, with the manual regulator handle, it takes a long time to open the window, which makes it uncomfortable. In addition, depending on the model, a lever box or the like is arranged between the window and the seat, so that there may not be sufficient space for operating the handle. Further, both the power window regulator and the manual regulator handle have a problem that the space occupied by the functional parts becomes large. The present invention
An object of the present invention is to provide an opening / closing structure for a sash window that can solve the above problems.

[0004]

According to the present invention, a sash frame is arranged on the outer peripheral surface of a cab, a seal member is fitted in a frame groove of the sash frame, and the outer peripheral edge portion of the glass plate is attached to the seal member. In the sash window that is inserted and slid the glass plate along the frame groove to open and close, one of the vertical sash frames in which the left and right edges of the glass plate are inserted and inserted is the cab. The fixed sash frame and the other sash frame are set as movable sash frames that are slightly displaced with respect to the edge of the glass plate, and the glass plate can be moved to the desired open / close position with respect to the movable sash frame. A locking means for locking the lock is provided. In that case, the lower part of the movable sash frame is rotatably pin-coupled to the fixed part of the cab, and the bottom part of the frame groove of the movable sash frame is pressed against the end face part of the edge of the glass plate. A fulcrum pin is rotatably provided near the movable sash frame of the cab frame,
A cam plate with a cam curved surface is fixedly attached to one end of the fulcrum pin, and a handle is attached to the other end.
The bottom of the frame groove of the movable sash frame locks and locks the glass plate by pressing and abutting the maximum projecting dimension portion of the cam curved surface portion from the fulcrum pin on the outer end surface portion of the movable sash frame by the handle operation. I chose In addition, a spring is provided on the fulcrum pin to reduce the descending speed of the glass plate due to its own weight when the handle is unlocked, and the cam curved surface of the cam plate gently presses the outer end surface of the movable sash frame by the spring. As described above, the bottom of the frame groove of the movable sash frame is always in contact with the edge face of the glass plate when the handle is unlocked. A seal member is fitted in the frame groove, and the seal member is pressed against the edge of the glass plate to lock and lock the glass plate.

[0005]

When the sash window is closed, the handle is in the lock locking operation position. In this case, in the cam plate attached to one end of the fulcrum pin to which the handle is attached, the maximum projecting dimension portion of the cam curved surface portion presses the outer end surface portion of the movable sash frame. Therefore, the bottom of the seal member fitted in the frame groove of the movable sash frame presses the end face of the edge of the glass plate, so that the glass plate can be locked.

Next, when the sash window is opened, the handle is operated from the lock locking operation position to the lock release operation position. The contact between the outer end surface of the movable sash frame and the maximum projecting dimension of the curved surface of the cam is released, and the movable sash frame can rotate about the lower pin, but the rotation in the above state The outer end surface portion of the sash frame faces the cam curved surface portion of the cam curved surface portion that does not protrude beyond the maximum protruding dimension portion. The cam curved surface portion is urged by a spring provided on the fulcrum pin so as to lightly press the outer end surface portion of the movable sash frame. Therefore, since the bottom of the seal member fitted in the frame groove of the movable sash frame is in light contact with the edge end face of the glass plate and is in contact with it, the friction force of the bottom of the glass plate can slow down and open the glass plate. it can.

Next, when the handle is moved from the lock release operation position to the lock engagement operation position while the glass plate is descending at a low speed as described above, the fulcrum pin and the cam plate rotate to move the cam curved surface portion. Since the maximum projecting dimension portion presses the outer end surface portion of the movable sash frame, the glass plate is locked and locked.
That is, by performing the above operation, the glass plate in the state of performing the opening operation can be stopped at a desired arbitrary position.

By operating the handle to the unlocking position, the glass plate can be lowered to the lowermost position and the sash window can be fully opened. When the sash window is closed, the lifting handle fixed to the upper part of the inner surface of the glass plate is manually closed by putting a finger on it.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a cab 8 having a sash window 7 of the present invention. FIG. 2 is a front view of the main part of the sash window 7 as viewed from the inside of the cab 8 in FIG. In the figure, 9 is a glass plate of the sash window 7, 10 is a lifting handle fixed to the upper part of the inner surface of the glass plate 9, and 11 is a glass plate 9.
In the figure, a fixed sash frame that guides and supports the left-side vertical edge portion, 12 is a movable sash frame that guides and supports the right-side vertical edge portion of the glass plate 9 in the figure, and 13 is a lower portion of the movable sash frame 12. A pin that is rotatably (rotatably in the left-right direction in the drawing) coupled to a fixed portion 14 of the cab 8, 15 is a handle for locking the glass plate 9, and 16 is a handle 1.
5 is a fulcrum pin attached, and 17 is a cam plate attached to one end of the fulcrum pin 16. FIG. 3 is a front view showing the glass plate 9 in FIG. 2 (the glass plate 9 is hatched for clarity), the fixed sash frame 11, the movable sash frame 12, and the handle 15. FIG.
FIG. 4 is a sectional view taken along line AA of FIG. 3. In the figure, 18 is a frame of the cab 8. FIG. 5 is an enlarged view of part B of FIG. 19 is a frame groove of the movable sash frame 12, 20 is a frame groove 19
A non-metallic seal member having a cushioning function, which is fitted to the, and 21 is a spring whose one end is hooked on the fulcrum pin 16 side and the other end is hooked on the frame 18 side. FIG. 6 shows C of FIG.
It is a figure which shows the vicinity of the cam plate 17 seen more. FIG. 7 is a diagram showing a state in which the sash window 7 is partially opened. Figure 8
It is a figure which shows the state which opened the sash window 7 fully.

Next, the opening / closing structure of the sash window 7 of the present invention will be described with reference to FIGS. According to the present invention, of the sash frames in the up-and-down direction in which the left and right edge portions of the glass plate 9 of the sash window 7 mounted on the cab 8 are fitted (guide supported), the left sash frame is fixed to the cab. The movable sash frame 12 is arranged as the frame 11, and the right sash frame is set to the movable sash frame 12 which is slightly displaced with respect to the right edge of the glass plate 9. In that case, the lower part of the movable sash frame 12 is placed in the cab 8
The pin 13 is rotatably coupled to the fixed portion 14 of the glass plate 9 so that the bottom portion of the seal member 20 fitted in the frame groove 19 of the movable sash frame 12 can be pressed against the end surface portion of the right edge of the glass plate 9. I chose The frame 18 of the cab 8 (shown in FIG. 5)
Fulcrum pin 16 is rotatably provided in the vicinity of the movable sash frame 12, and one end of the fulcrum pin 16 is fixedly attached with a cam plate 17 having a cam curved surface portion 22 (shown in FIG. 6). The handle 15 is attached to the end, and the handle 15
The maximum protruding dimension portion 23 (the length from the axis 0 of the fulcrum pin 16 to the maximum protruding dimension portion 23 is the dimension L) of the cam curved surface portion 22 of the cam curved surface portion 22 is manipulated to operate on the outer end surface of the movable sash frame 12. By pressing and abutting against the portion 24 (shown in FIGS. 5 and 6), the bottom of the seal member 20 fitted in the frame groove 19 of the movable sash frame 12 locks and locks the glass plate 9. .

Further, in the present invention, in order to slow down the descending speed of the glass plate 9 due to its own weight during the unlocking operation of the handle 15 (operating the handle 15 shown in FIG. 6 to the unlocking operation position C), it is shown in FIG. So that spring 2 is attached to fulcrum pin 16
1, the cam curved surface portion 22 of the cam plate 17 is urged by the spring 21 so as to lightly press the outer end surface portion 24 of the movable sash frame 12, and is fitted to the movable sash frame 12 when the handle 15 is unlocked. The bottom portion of the attached seal member 20 is always in contact with the edge surface of the glass plate 9.

Next, the operation of the opening / closing structure for the sash window 7 of the present invention will be described. First, when the sash window 7 is closed, the handle 15 is in the lock locking operation position B as shown in FIGS. In this case, the maximum projecting dimension portion 23 of the cam curved surface portion 22 of the cam plate 17 presses the outer end surface portion 24 of the movable sash frame 12. Therefore, the bottom of the seal member 20 fitted to the movable sash frame 12 presses the end face of the edge of the glass plate 9, so that the glass plate 9 can be locked.

Next, when the sash window 7 is opened, the handle 15 is operated from the lock locking operation position B to the lock release operation position C. The contact between the outer end surface portion 24 of the movable sash frame 12 and the maximum projecting dimension portion 23 of the cam curved surface portion 22 is released, and the movable sash frame 12 becomes rotatable about the lower pin 13, but Due to the spring 21 provided on the fulcrum pin 16, the cam curved surface portion (the portion denoted by reference numeral 2 in FIG. 6) other than the maximum protruding dimension portion 23 is movable.
Then, the outer end surface portion 24 is lightly pressed. Therefore, the bottom portion of the seal member 20 fitted in the movable sash frame 12 is lightly pressed against the edge end surface portion of the glass plate 9 to make contact therewith, so that the frictional force reduces the self-weight drop of the glass plate 9 at a low speed. Can be opened.

Next, when the handle 15 is moved from the lock release operation position C to the lock locking operation position B while the glass plate 9 is descending at a low speed as described above, the fulcrum pin 16
The cam plate 17 rotates and the maximum projecting dimension portion 23 of the cam curved surface portion 22 presses the outer end surface portion 24 of the movable sash frame 12, so that the glass plate 9 is locked. That is, by performing the above-described operation, the glass plate 9 can be stopped at a desired arbitrary position as shown in FIG. 7 while the opening operation is being performed.

By operating the handle 15 to the unlocking operation position (b), the glass plate 9 can be lowered by its own weight to the lowermost position to fully open the sash window 7, as shown in FIG. Further, when the sash window 7 is closed, the lifting handle 10 fixed to the upper portion on the inner surface side of the glass plate 9 is manually closed by putting fingers.

[0016]

When the sash window according to the present invention is closed, the handle is brought into the lock / lock operation position. In this case, in the cam plate attached to one end of the fulcrum pin to which the handle is attached, the maximum projecting dimension of the cam curved surface portion presses the outer edge of the movable sash frame. Therefore, since the bottom portion of the seal member fitted in the frame groove of the movable sash frame is pressed by the end face portion of the edge portion of the glass plate, the glass plate can be securely locked. Next, when opening the sash window, the handle is operated from the lock locking operation position to the lock release operation position. The contact between the outer end surface of the movable sash frame and the maximum projecting dimension of the cam curved surface is released, and the movable sash frame is in a state of being able to rotate about the lower pin. The cam curved surface portion of the portion that does not protrude from the maximum protruding dimension portion of the cam curved surface portion lightly presses the outer end surface portion of the movable sash frame. Therefore, since the bottom of the seal member fitted in the frame groove of the movable sash frame is in light contact with the edge end face of the glass plate and is in contact with it, the friction force of the bottom of the glass plate can slow down and open the glass plate. it can. Next, when the handle is moved from the lock release operation position to the lock engagement operation position while the glass plate is descending at a low speed as described above, the fulcrum pin and the cam plate rotate, and the maximum protruding size of the curved surface of the cam is reached. Since the portion presses the outer end surface portion of the movable sash frame, the glass plate is locked and locked. That is, by performing the above operation, the glass plate in the state of performing the opening operation can be stopped at a desired arbitrary position. As described above, in the present invention, the descent speed of the glass plate can be slowed during the opening operation of the sash window, so that the opening operation of the sash window can be optimized. Also, regardless of the shape of the glass plate, it is only necessary to set the fixed sash frame and the movable sash frame, so even if there is a small portion directly on the edge of the glass plate that is inserted into the movable sash frame as the front view shape of the glass plate. The glass plate can be guided and supported without rattling. Further, when the sash window is opened, the handle can be moved to the lock release operation position and pivotally moved to the lock engagement operation position at a required time point, so that the operation is easy and the operability is excellent. Further, since the mounting of the cam plate and the handle may be taken into consideration for occupying the space of the opening / closing structure, the opening / closing structure can be arranged in a minimum space and the structure is simple, so that the structure can be manufactured at low cost and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a cab provided with a sash window of the present invention.

FIG. 2 is a front view of the main part of the sash window as viewed from the inside of the cab in FIG.

FIG. 3 is a front view of relevant parts showing the periphery of the glass plate in FIG.

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

5 is an enlarged view of part B in FIG.

6 is a diagram showing the vicinity of a cam plate viewed from C of FIG.

FIG. 7 is a view showing a state where a sash window is partially opened.

FIG. 8 is a view showing a state in which a sash window is fully opened.

FIG. 9 is a cross-sectional view of an essential part showing a sash window of an embodiment of the prior art.

[Explanation of symbols]

 1, 7 sash window 5, 9 glass plate 8 cab 11 fixed sash frame 12 movable sash frame 13 pin 15 handle 16 fulcrum pin 17 cam plate 18 frame 19 frame groove 20 seal member 21 spring 22 cam curved surface part 23 maximum protruding dimension part 24 Outer end face

Claims (5)

[Claims] 1. A sash window of a cab in which a glass plate is slid along a frame groove for opening and closing, and one of sash frames in the vertical direction in which right and left end edges of the glass plate are fitted and inserted. Place the sash frame fixed to the cab, and set the other sash frame to a movable sash frame that is slightly displaced with respect to the edge of the glass plate.
An opening / closing structure for a sash window of a cab, characterized by comprising locking means for locking and locking the glass plate at a desired arbitrary opening / closing position. 2. The opening / closing structure for a sash window of a cab according to claim 1, wherein a lower portion of the movable sash frame is rotatably pin-coupled to a fixed portion of the cab, and an end face portion of an edge portion of the glass plate. A structure for opening and closing a sash window of a cab, characterized in that the glass plate is locked and locked by rotationally displacing the bottom portion of the frame groove of the movable sash frame so as to press the glass plate. 3. A sash window opening / closing structure for a cab according to claim 2, wherein a fulcrum pin is rotatably provided near a movable sash frame of the cab frame, and a gum is provided at one end of the fulcrum pin. A cam plate with a curved surface is fixed and attached, and a handle is attached to the other end.By operating the handle, the maximum protruding dimension of the cam curved surface from the fulcrum pin is pressed against the outer end surface of the movable sash frame. A structure for opening and closing a sash window of a cab, characterized in that the bottom of the frame groove of the movable sash frame locks and locks the glass plate by contacting. 4. The sash window opening / closing structure for a cab according to claim 3, wherein a spring is provided on the fulcrum pin in order to reduce the descending speed due to the weight of the glass plate when the handle is unlocked. The spring urges the cam curved surface of the cam plate to lightly press the outer end surface of the movable sash frame, and the bottom of the frame groove of the movable sash frame is the edge part of the glass plate when the handle is unlocked. The opening and closing structure of the sash window of the cab, which is characterized by being in constant contact with the cab. 5. The glass plate is locked by fitting a sealing member into the frame groove and pressing the sealing member against the edge of the glass plate. The opening / closing structure for the sash window of the cab according to claim 4.