JPS61169591A - Front window lock apparatus of vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for locking a front window of a driver's cab of a vehicle such as a power shovel.

(Prior art) Generally, in the operator's cab of a power excavator, the front window is slid along a guide rail from the front of the operator's cab to the ceiling of the operator's cab, opening the front of the operator's cab wide. It is now possible to do so. Conventionally, a device has been proposed that locks the front window to the vehicle body when the front window is moved to the ceiling of the driver's cab.

However, in this type of conventional locking device, the front window is locked only in the length direction of the guide rail.
It was not locked in the direction perpendicular thereto, that is, in the width direction of the front window.

[Problem that the invention seeks to solve]

However, in order to allow the front window to move smoothly along the guide rail, it is necessary to create a relatively large gap between the front window and the guide rail in the width direction of the front window, taking into account manufacturing errors. It is necessary to set it up. Therefore, conventionally, even if the front window is locked by a locking device, when the vehicle is subjected to large vibrations, the front window vibrates in its width direction, and the rollers interposed between the front window and the guide rail There have been problems in that the support shafts of these 0-ra are extremely worn out and cracks occur in the guide rails.

(Object of the Invention) The present invention was made to solve the above-mentioned conventional problems, and the front window can be extended not only in the longitudinal direction of the guide rail, but also in the longitudinal direction of the guide rail.
To provide a vehicle front window locking device capable of locking also in the width direction.

[Means for solving problems]

The front window locking device for a vehicle according to the present invention has a movable front window (3) provided on a front window (3) that can be slid along a guide rail (2) between the front part and the ceiling of a driver's cab (1) of a vehicle. The vehicle has a side (10a) and a fixed side (10b) fixed to the driver's cab (1).

The movable side (10a) further includes a front window (3).
A first engaging member (19), a second engaging member (20), and a third engaging member (21) that are rotatably supported within a predetermined range relative to the first engaging member ( 19), a first spring (22), a second spring (23), and a third spring (24) that bias the second engagement member (20) and the third engagement member (21) in predetermined rotational directions, respectively. It has

Further, the first engaging member (19) has a recess (19a) having a trapezoidal cross section at the bottom thereof, and a recess (19a) having a trapezoidal cross section at the bottom thereof;
The hook provided in 19) has a portion (19d).

Further, the second engaging member (20) has a lever portion (20a
), a key part (20b), and a hook part (20c).

Further, the third engaging member (21) has a key portion (21a).

Further, the fixed side (10b) includes a fixed member (27) fixed to the driver's cab (1), and this fixed member (27) is connected to the first engaging member (19). Recess (
A recess (27d) is formed having a bottom cross-sectional shape corresponding to the bottom cross-sectional shape of 19a).

[Effect]

In the present invention, the front window (3) is connected to the driver's cab (
1), one end of the recess (19a) of the first engaging member (19) comes into contact with the fixing member (27), and the first engaging member (19) rotates in a direction opposite to the predetermined rotation direction against the first spring (22).

Further, when the front window (3) completely reaches the predetermined position, the recess (19a) of the first engagement member (19)
is completely engaged with the recess (27d) of the fixing member (27), and the key part (20b) of the second engaging member (20) is hooked by the force of the second spring (23). is engaged with the portion (19d), whereby the front window (3) is locked with respect to the driver's cab (1) in the length direction and width direction of the guide rail (2).

Next, from this state, the second engagement member (20) is pushed by the lever part (20a), thereby causing the second spring (2
3), when the key portion (20b) of the second engaging member (20) and the first engaging member (19) are rotated in the opposite direction to the predetermined rotating direction, the hook portion of the second engaging member (20) and the first engaging member (19) become unlatched. (19d) is disengaged, and the key part (2) of the third engaging member (21) is released.
1a), the hook of the second engaging member (20) engages with the portion (20c) due to the force of the third spring (24), and the portion (21b>) of the third engaging member (21) is brought into contact with a part of the second engaging member (20) and the first engaging member (20)
The rotation in the predetermined rotation direction of 1) causes the second engagement member (
20), whereby the key portion (20b) and the hook engage with the portion (19d);
is locked in the released position.

And furthermore, the front from this state! When <31 is moved forward, the first engaging member (19) is rotated in the predetermined direction and the recess (1) of the first engaging member (19) is rotated.
9a) and the recess (27d) of the fixing member (27) are disengaged, and the second engagement member (20) and the third engagement member (21) also disengage from the second spring (23).
and the key part (21a) of the third engagement member (21) is rotated in the predetermined rotation direction by the force of the third spring (24).
) and the second engaging member (20) are disengaged from the portion (20c).

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

2 and 3 show side views of the cab of the power shovel. Guide rails 2 are provided on the left and right walls of the driver's cab 1, respectively, and extend from the front of the driver's cab 1 to the ceiling. Details of the guide rail 2 are shown in Figures 1, 5, and 6.
, 7 and 8, and especially its cross-sectional shape is shown in FIG. 6 (1a and 1b in FIGS. (indicates the members that make up the wall).

In FIGS. 2 and 3, 3 is a front window, and this front window 3 has a frame 4 as shown in detail in FIG.
and a window glass 5 (shown only in FIG. 4) attached to this frame 4. At the four corners of the frame 4, 0-
- The shaft 6 is fixed. These roller shafts 6 include
Each roller 7 is rotatably supported, and these rollers 7 are fitted to the guide rail 2 so as to be movable. Further, a handle 8 for the driver to operate the front window 3 is attached to the frame 4.

Further, a movable side 1 of the front window locking device is provided near one corner of the lower end side of the frame 4 via a locking device mounting plate 9.
0a is attached.

Next, details of the movable side 10a of this locking device will be explained with reference to FIG. 1 and FIGS. 5 to 9. A support 11 is fixed to the locking device mounting plate 9, and this support 11
Base plates 12 and 13 are fixed to the base plates 12 and 13 with bolts 14 and nuts 15. Said base plate 12.13
In between, a shaft 16 is supported perpendicularly to the front window 3 and is rotatable relative to the base plate 12.13. A first engagement member 19 is fixed to the shaft 16.

Further, between the base plates 12 and 13, there are shafts 17 and 1.
8 is fixed vertically to the front window 3. A second engagement member 20 and a third engagement member 21 are rotatably supported on the shaft 17 and shaft 18, respectively. Note that each of the engaging members 20, 21, and 22 is connected to the base plate 12.
It is contained in 13 questions.

A first spring 22 made of a torsion coil spring is interposed between the shaft 16 and the shaft 18, with its center portion being penetrated by the shaft 16. The first engaging member 19 is biased counterclockwise in FIGS. 1, 7, and 8 (hereinafter, clockwise or counterclockwise directions refer to FIGS. 1 and 7). and 8
(On the diagram)

A second spring 23, which may be a torsion coil spring, is interposed between the second engagement member 20 and the shaft 18, with its center portion being penetrated by the shaft 17. The second engaging member 20 is biased counterclockwise. Furthermore, a third spring 24 made of a torsion coil spring is interposed between the base plate 13 and the third engaging member 21, with the shaft 18 passing through the center of the third spring 24. 24 urges the third engaging member 21 counterclockwise.

ing.

The base plate 13 is provided with stopper portions 13a and 13b that limit the rotation range of the first engaging member 19.

The first engaging member 19 is provided with a recess 19a. As shown in FIG. 9, the cross-sectional shape of the bottom of this recess 19a is trapezoidal, and the cross-sectional shape corresponds to the cross-sectional shape of the bottom of the recess 27d of the fixing member 27. .

Further, the first engaging member 19 is provided with a hook portion 19d. Further, the first engaging member 19 is provided with a curved portion 19e adjacent to the hook portion 19d.

The second engagement member 20 is provided with a lever portion 20a and a key portion 20b that engages with the hook portion 19d of the first engagement member 19, and the tip of the key portion 20b is connected to the second engagement member 20a. It is bent at right angles to the rest of the engagement member 22. Further, the second engaging member 20 is provided with a hook portion 200 at a position substantially opposite to the key portion 20b. Further, the second engaging member 20 is also provided with a curved portion 20d adjacent to the hook portion 20C.

The third engaging member 21 is provided with a key portion 21a that engages with the hook portion 20c, and the tip of the key portion 21a is perpendicular to the remaining portion of the third engaging member 21. It is bent to Further, the third engaging member 21 is provided with a protrusion 21b that approaches and separates from the second engaging member 20.

The fixed side 10b of the lock device 10 is provided near the front end of the ceiling of the driver's cab 1. Next, this fixed side 10
The structure of b will be explained.

As shown in FIGS. 6 to 8, the member 1a constituting the wall of the driver's cab 1 has a fixing member mounting plate 2.
6 is fixed, and the fixing member 2 is fixed to this mounting plate 26.
7 is fixed by welding. This fixing member 27 is
Its central part is a small diameter part 27a1, and its both ends are large diameter parts 27b.
1. The intermediate portion between the narrow diameter portion 27a and the large diameter portion 27b is a tapered portion 27C. The narrow diameter portion 27a, the large diameter portion 27b, and the tapered portion 27C all have a circular cross section, and these narrow diameter portions 27a
A recess 27d having a bottom cross-sectional shape corresponding to the cross-sectional shape of the bottom of the recess 19a of the first engaging member 19 is formed in the fixing member 27 by the first large diameter portion 27b and the tapered portion 27C. There is. The fixing member 27 is installed as described above in such a direction that the fixing member 27 is parallel to the axes 16, 17 and 18 when the front window 3 reaches the ceiling of the driver's cab 1. It is fixed to a fixed member mounting plate 26.

Next, the operation of this embodiment will be explained.

The front window 3 can be moved along the guide rail 2 by holding the handle 8 and applying force (at this time, the roller 7 is transferred along the guide rail 2 to move the front window 3. smooth).

Therefore, the front window 3 moves from the state at the front of the driver's cab 1 as shown in position "A" in FIG. 2 to the intermediate state as shown in position "Open" in FIG. It is possible to move up to the ceiling of the driver's cab 1 as shown in "C", or conversely, it is also possible to return from the position "C" to position "A" via the position "mouth". When the front window 3 is in the above position @ "C", the front part of the driver's cab 1 is wide open.

During the process in which the front window 3 moves from the position "A" to just before the position "C", the movable side 10a of the locking device is in the state shown in FIG. 7. That is, in this case, the key part 20b of the second engaging member 20 is not engaged with the pull part 19d of the first engaging member 19, and the first engaging member 19 is Due to the force of the spring 22, it is rotated most counterclockwise, and its stopper contact portion 19c is brought into contact with the stopper portion 13b of the base plate 13. Further, the third engaging member 21 does not engage its key portion 21a with the hook portion 20c of the second engaging member 20.

Then, when the front window 3 reaches just before the position @ "C", one end of the recess 19a of the first engaging member 19 comes into contact with the fixing member 27, so the first engaging member 19 22 and rotates clockwise.

Then, when the front window 3 completely reaches the position "C", the first
As shown in the figure, the concave portion 19a of the first engaging member 19 is connected to the fixing member 2.
It is in a state where it is completely engaged with the recess 27d of No.7. Further, at this time, due to the force of the second spring 23, the key portion 20b of the second engaging member 20 slides on the curved portion 19e of the first engaging member 19, and the hook engages with the portion 19d. As a result, the first engaging member 19 is locked with its recess 19a fitted into the fixing member 27 as described above, and as a result, the front window 3 is locked with respect to the driver's cab 1.

Here, as described above, the bottom of the recess 19a of the first engaging member 19 has a trapezoidal cross section corresponding to the bottom of the recess 27d of the fixing member 27.
Since the state of engagement with the driver's cab 1 is as shown in FIG.
The front window 3 is locked not only in the longitudinal direction of the guide rail 2 but also in a direction perpendicular thereto.

Therefore, vibration of the front window 3 is prevented not only in the longitudinal direction of the guide rail 2 but also in a direction perpendicular thereto. (In this embodiment, the movable side 10a of the locking device is provided on the front end side of the front window 3, but the rail 2 has a width between the rails at the rear end that is larger than the width at other parts. Since it is smaller, the front window 3
When the front window 3 reaches position "c", the gap between the rear end of the front window 3 and the rail 2 becomes narrower, so there is no risk of vibrations on the rear end side of the front window 3 increasing).

Next, when the driver wants to release the locked state of the front window 3, the driver pushes the lever part 20a of the second engaging member 20 and moves the second engaging member 20 clockwise against the second spring 23. Rotate it. Then, as shown in FIG.
The hook between the key part 20b of No. 0 and the first engaging member 19 is disengaged from the part 19d. Also, at this time, the key part 21a of the third engaging member 21 cleans the curved part 20d of the second engaging member 20 by the force of the third spring 24 and engages with the hook part 20C,
And the protrusion 21b of the third engaging member 21 is connected to the second engaging member 2.
0, and the counterclockwise rotation of the third engaging member 21 is prevented by the second engaging member 20. Therefore, the second engaging member 20 has its key portion 20b.
The hook of the first engaging member 19 is locked while being separated from the portion 19d. As a result, even if the driver releases his hand from the lever portion 20a of the second engagement member 20, the key portion 20b will not engage with the claw portion 20d again.

Therefore, if the driver subsequently pushes the front window 3 forward, the first engaging member 19 rotates counterclockwise, and the front window 3 moves forward along the guide rail 2. And front window 3
When the first engaging member 19 moves forward a certain distance, the recess 19a of the first engaging member 19 separates from the fixing member 27. On the other hand, the second engaging member 20 and the third engaging member 21 are also rotated counterclockwise by the force of the second spring and the third spring 24, so that the key part 21a of the third engaging member 21 and the second engaging member The hook of the engaging member 20 is disengaged from the portion 20G. Therefore, the movable side 10a of the locking device returns to the initial state shown in FIG. 7.

In addition, although the above-mentioned embodiment shows the case where the vehicle front window locking device according to the present invention is applied to the driver's cab of a power shovel, it is understood that the present invention can also be applied to the driver's cab of other types of vehicles. Needless to say.

(Effects of the Invention) As described above, the vehicle front window locking device according to the present invention has an excellent effect in that the front window can be locked not only in the length direction of the guide rail but also in the width direction. It is something.

[Brief explanation of drawings]

Fig. 1 is a front view showing a front window locking device for a vehicle according to the present invention, Fig. 2 is a side view showing the driver's cab of a power shovel equipped with the above embodiment, and Fig. 3 is a front view where the front window has been moved to the ceiling. FIG. 4 is a front view showing the front window to which the movable side of the embodiment is attached, FIG. 5 is a side view of the embodiment, and FIG. v- in the diagram
7 and 8 are front views showing the operation of the embodiment, and FIG. 9 shows the fitted state of the first engaging member and the fixing member in the embodiment as shown in FIG. 1. IX
It is a cross-sectional view taken along the -IX line. DESCRIPTION OF SYMBOLS 1... Driver's cab, 2... Guide rail, 3... Front window, 7... Roller, 10a... Movable side of front window ivy device, 10b... Fixed side of front window ivy device , 16
．． 17° 18... Shaft, 19... First engaging member, 19
a... Recessed portion, 19d... Hook portion, 20... Second engaging member, 20a... Lever portion, 20b... Key portion,
20C...Hook part, 21...Third engagement member, 21
a...Key part, 21b...Protrusion part, 22...First spring, 23...Second spring, 24...Third spring, 27.
...Fixing member, 27d...recess. Patent Applicant Yasa Chikara Kogyo Co., Ltd. Agent Patent Attorney Omori Higashi Figure 1 Y ゝ Figure 4 Figure 6 Figure 8 Figure 2 1a

Claims (1)

[Scope of Claims] A movable side (10a) provided on a front window (3) that can be slid along a guide rail (2) between the front part and the ceiling of a driver's cab (1) of a vehicle. , a fixed side (10b) fixed to the driver's cab (1), and further, the movable side (10a) is rotatable within a predetermined range with respect to the front window (3). The supported first engagement member (19), second engagement member (20) and third engagement member (
21), a first spring (22), a first spring (22), which biases the first engagement member (19), second engagement member (20), and third engagement member (21) in a predetermined rotational direction, respectively. Two springs (23
) and a third spring (24), and the first engaging member (19
), a recess (19a) with a trapezoidal cross section at the bottom, a hook (19d) provided in the first engagement member (19), and a hook part (19d) provided in the second engagement member ( 20), a lever part (20a) and a key part (20b) respectively provided in
and the hook portion (20c), and the third engaging member (21
), the fixed side (10b) has a fixed member (27) fixed to the driver's cab (1), and the fixed side (10b) has a fixed member (27) fixed to the driver's cab (1). The fixing member (27) is located in the recess (19a) of the first engaging member (19).
a recess (27d) having a bottom cross-sectional shape corresponding to the cross-sectional shape of the bottom of the driver's cab (1); A part of the recess (19a) of the first engagement member (19) abuts the fixing member (27), and the first engagement member (19) resists the first spring (22). When the front window (3) completely reaches the predetermined position, the recess (19a) of the first engagement member (19) is rotated in the opposite direction to the predetermined rotation direction. The member (27) is completely engaged with the concave portion (27d), and the key portion (27) of the second engaging member (20) is completely engaged with the recess (27d).
20b) is hooked by the force of the second spring (23).
19d), and then from this state, the second engagement member (20) is pushed by the lever part (20a), thereby causing the second spring (2
3) in a direction opposite to the predetermined rotation direction, the key part (20b) of the second engaging member (20) and the hook part of the first engaging member (19) (19d) is disengaged, and the third engaging member (21) is disengaged from the key portion (21).
1a) engages with the hook portion (20c) of the second engagement member (20) by the force of the third spring (24), and a part (21b) of the third engagement member (21) is brought into contact with a part of the second engaging member (20) and the third engaging member (20)
The rotation in the predetermined rotation direction of 1) causes the second engagement member (
20), whereby the key part (20b) and the hook part (19d) are locked in a disengaged state, and from this state, the front window (3) is moved forward. When moved, the first engaging member (19) is rotated in the predetermined direction, and the recess (19a) of the first engaging member (19) and the recess (27d) of the fixing member (27) are connected to each other. are disengaged, and the second engagement member (20) and the third engagement member (21) are also moved in the predetermined rotation direction by the force of the second spring (23) and the third spring (24). A front surface of a vehicle characterized in that the key part (21a) of the third engaging member (21) and the hook part (20c) of the second engaging member (20) are disengaged by being rotated. Window locking device.