JPH0712608Y2 - Steady-state device for opening / closing mechanism of front window of cab for construction machinery - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a front window steadying device in a front window opening / closing mechanism in which a ceiling portion is a front window storage portion in a cab of a construction machine. It is about.

(Prior Art) As shown in FIG. 5, there is a construction machine vehicle in which a front window 12 is openably and closably mounted between a ceiling portion and a front surface of a driver's cab 11.

FIG. 6 shows an example of a steady rest for storing a front window of a conventional operator's cab front window opening / closing mechanism for a construction machine.
By moving the guide rollers 15 of the front window 12 in the guide rails 14 provided on the left and right inner wall surfaces 13 of the front window 12,
Is accommodated on the lower surface of the ceiling portion 16, and at that time, the cushion rubber 18 attached to the front window 12 through the bracket 17 hits the stoppers 19 arranged on the left and right inner wall surfaces 13 so that the front window is accommodated in the left-right direction. I tried to stop the swing of.

However, in this case, since there is a vertical gap between the guide rail 14 and the guide roller 15, the front window 12 can be stored at the time of storage.
It is not possible to stop the vertical swing of. Furthermore, in this mechanism, there is a bracket 17 protruding from the front window 12 to the driver side, and a stopper 19 provided on the inner wall surface 13 near the driver's head, thereby ensuring safety in the driver's cab. It is also not preferable in terms of aspect.

7 and 8 show another example of the conventional steady rest, in which the guide rail 21 of the front window 12 is provided with a step at the stop position of the lower guide roller 22 of the front window 12, and The upper guide roller 24 provided with the stopper 23 and having a smaller diameter than the lower guide roller 22 does not stop on the stopper 23 but fits on the narrow guide rail 21a, but the lower guide roller 22 engages with the stopper 23. , The swing of the front window 12 is stopped.

However, in this case, when the upper guide roller 24 is in front of the stopper 23 (on the left side in FIG. 7), there is an excessive gap between the guide rail 21 and the upper guide roller 24.
The front window 12 has a large backlash, and the lower guide roller 22
Guide rails 21, 2 even when they are hitting the stopper 23.
Since there is a gap 25 in the left-right direction shown in FIG. 8 between the 1a and the guide rollers 22, 24, it is impossible to stop the runout in the left-right direction.

(Problems to be solved by the invention) As described above, the steady rest in the cab front window opening / closing mechanism for the construction machine of the related art includes the bracket 17 and the stoppers 19, 23 necessary to prevent the front window 12 from swinging. Etc. in the cab 11
There is a problem that it is unfavorable for safety because it protrudes from the inner wall surface 13 of the driver to the driver side, and further, when the front window 12 is stored in the ceiling part 16, the vertical and horizontal deflection of the front window 12 should be stopped at the same time. There is a problem that can not be done.

The present invention is intended to solve such a conventional problem, eliminates structural protrusions, improves safety, and further prevents the front window from swinging in all directions during storage. The purpose is to

[Structure of the Invention] (Means for Solving the Problems) The invention of claim 1 is the left and right inner wall surfaces 13 of the cab 11 for construction machinery.
Guide rails 31 installed from the front side to the ceiling side
, Guide rollers 32, 33 rotatably supported on both left and right sides of the front window 12 are movably incorporated, and the front window 12 moved from the front of the cab 11 along the guide rail 31 is mounted on the ceiling. In the operator's cab front window opening / closing mechanism for a construction machine housed in a section, one mating body 35 is provided on the outer wall surface 34 of the front window 12, and the ceiling surface in the cab 11 has the front window accommodated therein. A steady rest in a cab front window opening / closing mechanism for a construction machine, in which one fitting body (36) that fits with one fitting body (35) is provided.

According to a second aspect of the present invention, the one fitting body 35 and the other fitting body 36 of the first aspect are fitted to each other through the front-rear direction inclined surface 37 and the left-right direction inclined surface 38.

(Operation) According to the first aspect of the invention, the one fitting body 35 provided on the outer wall surface 34 of the front window 12 is provided not in the driver side when the front window is stored but in the gap between the front window 12 and the cab ceiling surface. When the front window is housed, the steady rest is completely invisible to the driver, and the front window 12 is steady without any protrusion to the inside of the driver's cab. It

The invention of claim 2 relates to one fitting body 35 and the other fitting body.
With the 36 fitted through the front and rear slopes 37,
By preventing the movement of 12, it is possible to suppress the vertical runout and the forward and backward runout when the front window is stored, and at this time, one fitting body 35 and the other fitting body 36 move the left and right slopes 38. Since they are fitted to each other, the shake in the left and right directions can be suppressed. That is, it is possible to prevent the front window 12 from swinging in all directions during storage.

(Embodiment) Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIGS. 1 to 4.

FIG. 1 and FIG. 2 show a front window opening / closing mechanism in the operator's cab 11 for construction machines. In this front window opening / closing mechanism, a guide rail 31 is formed in a groove shape on the left and right inner wall surfaces 13 of the operator's cab 11 for construction machinery from the front side to the ceiling side integrally with the side wall plate, and the front window 12 is formed on the guide rail 31. An upper guide roller 32 and a lower guide roller 33, which are rotatably supported on both left and right sides of the, are movably incorporated, and a front window 12 moved from the front surface of the operator cab 11 along the guide rail 31 to the ceiling. It is stored on the bottom of the unit.

A projection body as one fitting body on the outer wall surface 34 of the front window 12.
35 is integrally provided, and on the ceiling surface in the cab 11,
An anti-sway receiving body 36 as the other fitting body which is set so as to be fitted with the projection body 35 when the front window is housed is integrally provided.

As shown in FIGS. 3 and 4, the protrusion 35 and the steady rest receiver 36 are fitted to each other through a front-rear sloping surface 37 and a left-right sloping surface 38. The protrusion 35 has a left and right slanted surface 38 formed into a convex surface, and the steady rest 36 has a left and right slanted surface 38 formed into a concave surface, and the convex surface and the concave surface are fitted when the front window is stored. To do.

As shown in FIG. 3, the steady rest receiver 36 is operated by screwing a bolt 42 and a nut 43 inserted into the steady rest receiver body from a groove 41 on the lower surface of the steady rest receiver 36. Chamber 11
It is fixed to the ceiling part 16 of. As shown in FIG. 4, the structure in which the guide rail 31 is formed in the inner wall surface 13 of the operator's cab 11 for the construction machine in the shape of a concave groove is in response to the request for widening the opening of the front window 12. Since nothing, such as a guide rail, sticks out on the wall surface 13 of the driver's cab where the front window 12 moves, it is effective for widening the opening of the front window 12, that is, the field of view.

Next, the operation of this embodiment will be described.

When the front window 12 is moved from the front window closed state shown in FIG. 1 to the front window open state (stored state) shown in FIG. 2, the projection 35 provided on the outer wall surface 34 of the front window 12 is Fitted with the steady rest receiver 36 in the gap between the front window 12 and the ceiling surface of the operator's cab 11, facing the ceiling surface side instead of the driver side. Therefore, when the front window is stored, the steady rest including the projection body 35 and the steady rest receiver 36 is completely invisible to the driver, and the steady rest of the front window 12 is prevented from protruding to the inside of the driver's cab. Is done.

At this time, as shown in FIG. 3, with the projection body 35 and the steady rest receiving body 36 engaged with each other through the inclined surface 37 in the front-rear direction, the front window locking mechanism (not shown) returns the front window 12 to the front. The vertical swing and the forward / backward swing when the front window is stored can be suppressed at the same time by locking the front window. Further, as shown in FIG. Since the fitting is performed via the slope 38, it is possible to suppress the shake in the left and right directions. In this way, it is possible to prevent the front window 12 from swinging in all directions during storage.

Note that the protrusion 35 and the steady rest receiver 36 may be provided opposite to each other.

[Advantage of the Invention] According to the invention of claim 1, as a steady rest in the operator's cab front window opening / closing mechanism for construction machinery, one fitting is provided on the outer wall surface of the front window, and the ceiling surface in the operator's cab is Since the other fitting body that fits with the one fitting body is provided in the front window storage state, when the front window is stored, the one fitting body provided on the outer wall surface of the front window is not the driver side but the front side. Since the other fitting body is fitted in the gap between the window and the ceiling surface, there is nothing that is projected to the driver side as a steady rest when the front window is housed, and the safety is high.

According to the second aspect of the present invention, the one fitting body and the other fitting body are fitted to each other through the front-rear direction inclined surface and the left-right direction inclined surface. By preventing movement of the front window in the state of being fitted through the sloping surface in the direction, it is possible to suppress the vertical runout and the forward and backward runout when the front window is stored. Since the mating body of is fitted through the inclined surface in the left-right direction, it is possible to suppress the shake in the left-right direction at the same time when the front window is stored, and in the end, suppress the shake in all directions of the front window when stored. You can

[Brief description of drawings]

FIG. 1 is a sectional view of a front window closed state of a cab for a construction machine provided with a front window opening / closing mechanism and a steady rest according to the present invention, FIG. 2 is a sectional view of the front window opened state, and FIG. Sectional view of the steady rest, FIG. 4 is a front view of the steady rest, FIG. 5 is a front view showing a construction machine vehicle, and FIG. 6 is a steady rest in a conventional operator's cab front window opening / closing mechanism for construction machinery. FIG. 7 is a side view showing another example of a conventional steady rest, and FIG. 8 is a sectional view taken along the line AA of FIG. 11 …… Operating room, 12 …… Front window, 13 …… Inner wall surface, 31 …… Guide rails, 32,33 …… Guide rollers, 34 …… Outer wall surface, 3
5 …… One mating body, 36 …… The other mating body, 37 …… Slope in the front-rear direction, 38 …… Slope in the left-right direction.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoichi Hata 1-3-2 Kita-Aoyama, Minato-ku, Tokyo New Caterpillar Mitsubishi Corporation (72) Hideo Sekine 1050 Oyamada, Takasu-cho, Onomichi, Hiroshima Prefecture Press Industry Co., Ltd. Onomichi Plant (72) Inventor Tomoya Hirano 1050 Oyamada, Takasu-cho, Onomichi City, Hiroshima Press Industry Co., Ltd. Onomichi Plant (56) References: 58-185656 (JP, U) Actual Kaisho 62-56682 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A guide rail provided on the left and right inner wall surfaces of a cab for a construction machine from a front side to a ceiling side is movably incorporated with guide rollers rotatably supported on both left and right sides of a front window. In a cab front window opening / closing mechanism for a construction machine, in which a front window moved from the front of the cab along the guide rail is housed in a ceiling part, one fitting body is provided on an outer wall surface of the front window, A steady rest in a driver's cab front window opening / closing mechanism for a construction machine, wherein the other fitting body that fits with the one fitting body when the front window is housed is provided on a ceiling surface in the room. 2. The operator's cab front window opening / closing means for a construction machine according to claim 1, wherein the one fitting body and the other fitting body are fitted to each other through a front and rear sloping surface and a left and right sloping surface. Steady stop device in the mechanism.