JPH05185834A - Cabin window on-off unit in industrial vehicle - Google Patents

Abstract

PURPOSE:To make an open degree expandible, in a cabin window on-off unit in an industrial vehicle such as a fork-lift truck or the like. CONSTITUTION:A windowpane 4 set up so as to be superposed on an outer side face at the peripheral edge part of an opening 2 to be formed in a body 1 is displaceably supported in the vertical direction via a parallel linkage 6. In addition, a gear 14 turning together with a link is installed in a turning fulcrum part at the side of the body 1 of this parallel linkage 6, and this gear 14 is turned around by operation of a handle 18 attached to the side of the body 1 via a gear train 19, through which the window pane 4 is displaced up and down via the parallel linkage 6, thus it is constituted to open or close a window in this way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window opening / closing device for industrial vehicles such as forklifts and power shovels, and more particularly to a window opening / closing device suitable for a side window of a cabin.

[0002]

2. Description of the Related Art As a conventional window for opening and closing a cabin in an industrial vehicle such as a forklift, a sliding type (sliding door) shown in FIGS. 7 and 8 is generally used. This is a window frame 32 of two rows inside and outside attached to the body 31 of the cabin.
The windshield 3 is attached to the slide rail formed by
3 has a double frame structure in which an aluminum glass frame 34 fitted to the outer periphery of the 3 is slidably fitted.

[0003]

However, in the above-described sliding type opening / closing window of the conventional double frame structure, the actual opening portion of the window is small for the size of the window frame. In particular, in the case of a side window of a cabin of a forklift, the size of the window itself tends to be restricted due to the layout, and therefore the opening portion is further narrowed. FIG. 5 shows an example in which the side window 37 is pushed forward due to an increase in the size of the rear pillar 36 of the cabin 35, and FIG. 6 shows an example in which the side window 37 is pushed backward due to the curved front window 38. .. As described above, the conventional sliding opening / closing window has a problem in that the opening degree of the window is limited due to restrictions on the opening / closing structure and layout.

In view of the above-mentioned problems, the present invention provides a cabin window opening / closing device for an industrial vehicle in which a window can be opened and closed by a combination of a parallel link and a gear so that the degree of opening can be increased. , The technical problem to be solved.

[0005]

In order to solve the above problems, the present invention is configured as follows. That is, the cabin window opening / closing device for an industrial vehicle according to the present invention displaces the window glass, which is arranged so as to overlap the outer peripheral surface of the opening formed in the body, in the vertical direction or the front-back direction by the parallel link mechanism. Support as much as possible,
A gear that rotates integrally with the link is set at a rotation fulcrum part of the parallel link mechanism with respect to the body side, and the gear can be driven by a rotation driving force input means installed on the body side. ..

[0006]

In the cabin window opening / closing apparatus according to the present invention configured as described above, when the rotating force is applied to the gears of the parallel link mechanism by the input means of the rotating force, the windshield is moved through the parallel link mechanism. It is possible to open and close the window by displacing it in parallel in the vertical direction or the front-back direction along the peripheral edge of the opening of the body.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings. This embodiment is applied to a side window (door window) of a forklift truck, in which FIG. 1 shows the front of the side window, FIG. 2 shows a cross section taken along the line AA of FIG. 4 and FIG. 4 respectively show modes of opening / closing operation of the windshield. As shown in the figure, a substantially rectangular opening 2 for a window is formed in the body 1, and a window glass 4 for opening and closing the opening 2 is formed.
Is arranged outside the opening 2, and is in contact with the outer surface of the frame edge 3 which is the opening peripheral portion through the inwardly facing seal member 5 attached to the periphery thereof. The frame edge 3 is formed in a rectangular cross section by bending the edge of the opening inward as shown in FIG.

The window glass 4 is supported by the body 1 through the parallel link mechanism 6.
The parallel link mechanism 6 has a pair of upper and lower first links 7 and 8, one end of which is pivotally attached to the body 1 side by a pin 9 so as to be rotatable about a horizontal axis, and one end of which is connected to the other end of the first link 7 and 8. It is composed of a pair of upper and lower second links 10 and 11 which are articulated by a pin 12 and whose other end is pivotally attached to the inner surface of the window glass 4 by a pin 13 so as to be vertically rotatable.
The parallel link mechanisms 6 having such a configuration are arranged along the inner surfaces of the front and rear frame edges 3 of the opening 2.

The first link 7, 8 and the second link 1
The lengths and the arrangement positions of 0 and 11 are set so as to configure the toggle mechanism. That is, as shown in (C) of FIG. 3, when the window glass 4 is in the closed position, the pin 12 which is a joint node of the first and second links 7, 8, 10, 11 is connected to the link 7. , 8, 10, 11 are set so as to be located on the extension line on the line connecting the pins 9, 13 which are the pivot points.

Further, in either one of the front and rear parallel link mechanisms 6, the pin 9, which is the pivot point of the upper and lower first links 7 and 8, is rotated integrally with the first link 7 and 8, respectively. Gears 14, 15 are attached, and both gears 14, 15 are housed in the frame edge 3.
The upper and lower gears 14 and 15 are arranged in the frame edge 3 in the guide 1
The rack 17 is movably attached to the rack 17 via 6 to engage with each other.

On the other hand, at the position where the frame edge 3 is easily operated on the indoor side, the handle 1 for opening / closing operation as a rotational force input means.
8 is attached, and the rotational force of the handle 18 is transmitted to the upper gear 14 via a gear train 19 which is set to an appropriate reduction ratio as a power transmission means. Further, the lower gear 15 is meshed with an intermediate gear 20 to which a suitable rotation resistance is applied by a resistance applying means using hydraulic pressure, for example, to prevent the gear 15 from rotating due to the weight of the windshield 4. ing.

The cabin window opening / closing apparatus of this embodiment is constructed as described above, and the window opening / closing operation will be described below with reference to FIGS. 3 and 4. FIG. 3A shows the maximum opened state of the window in which the window glass 4 is displaced downward. In this state, when the handle 18 is rotated in the direction of arrow P, the upper gear 14 is rotated via the gear train 19, and the rack 17 meshing with the gear 14 moves upward along the guide 16, Accordingly, the lower gear 15 is rotated in the same direction. That is, the upper and lower gears 1
4, 15 rotate together. Therefore, as shown in FIG. 3B, the upper and lower first links 7, 8 and the second link 10,
11 rotate in the direction of the arrow, respectively, and the window glass 4 is pulled up to a position that closes the opening 2 along the outer surface of the frame edge 3.

In this embodiment, however, the parallel link mechanism 5
Of the toggle mechanism,
When the handle 18 is further rotated from the state of (B),
At the top dead center where the joint node of the first link 7, 8 and the second link 10, 11 coincides with the extension of the straight line connecting the pivot points of the first link 7, 8 and the second link 10, 11, Three
As shown in (C), the window glass 4 is pulled inward. Therefore, the seal member 5 is strongly pressed against the frame edge 3 in a bent state, and the window seal is secured.

In the closed state shown in FIG. 3C, when the handle 18 is rotated in the direction of the arrow Q, that is, in the reverse direction, the parallel link mechanism 6 moves in the opposite direction to the closed state, and the window glass is closed. 4 is displaced downward to open the window, but when the rotation of the handle 18 is stopped during the opening operation, the window glass 4 can be held in the halfway opened position by the resistance given by the intermediate gear 20.

Further, in the closed state shown in FIG. 3C, when the handle 18 is further rotated in the direction of the arrow P, which is the closing direction, the parallel link mechanism 6 moves as shown in FIG. 4A. As the top dead center is exceeded, the pressing of the window glass 4 against the frame edge 3 is released, and the rack 17 is disengaged from the lower gear 15. That is, the interlocking relationship between the upper and lower gears 14 and 15 is separated, and only the upper first link 7 and the second link 10 are rotated, and the upper portion of the window glass 4 is pressed outward as shown in FIG. 4B. Therefore, the window glass 4 is pivoted outward with its lower edge abutting the lower frame edge 3 to open the window.

At this time, the lower first link 8 and second link 11, which are given resistance by the intermediate gear 20,
Although the windshield 4 is prevented from being displaced downward due to its own weight, the windshield 4 follows the action force associated with the rotation of the windshield 4 with the lower end edge as a fulcrum. In the state shown in FIG. 4 (B), if the handle 18 is rotated in the reverse direction, the window glass 4 is returned to the closed state shown in FIG. 3 (C).

As described above, according to the cabin window opening / closing apparatus of this embodiment, the window is opened and closed by moving the window glass 4 in parallel along the frame edge 3 of the opening 2, and the lower end side is used as a fulcrum. It is possible to open and close the window in two ways by rotating all of them, and thus it is possible to properly use the window depending on the occupant's preference or the situation.

The present invention is not limited to the illustrated embodiment, but can be modified as needed. For example, the handle 1 as an input means of the rotational force
8 to a motor, a gear train 19 as a power transmission means to a belt or a chain, and a rotation applying sliding surface of a gear or a link as a resistance applying means for suppressing movement of the windshield 4 due to its own weight. Interposing a resistor made of a material having a high frictional resistance such as rubber, or appropriately selecting the tooth ratio of the gear, an open / close type by parallel movement of the windshield 4 in the vertical direction and an open / close type by parallel movement in the front / rear direction. It is possible to change to

[0019]

As described in detail above, in the cabin window opening / closing apparatus of the present invention, the window is opened and closed by moving the window glass in parallel along the frame edge of the opening of the body through the parallel link mechanism. By doing so, the double frame structure, which was required in the conventional sliding type opening / closing window, can be omitted, so that the degree of freedom in setting the opening of the window formed in the body can be obtained, and the window glass can be obtained. It is possible to increase the opening / closing momentum, and it is possible to obtain a degree of freedom in layout or a degree of freedom in shape due to the elimination of the double window frame structure.

[Brief description of drawings]

FIG. 1 is a front view of a cabin window opening / closing device according to an embodiment of the present invention as viewed from the inside.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view taken along the line BB in FIG. 1, showing an opening / closing manner by parallel movement of the windshield.

FIG. 4 is a cross-sectional view taken along the line BB in FIG. 1, showing an opening / closing manner by rotating the windshield.

FIG. 5 is a side view illustrating a layout of a side window due to an increase in size of a rear pillar of a cabin in a conventional forklift.

FIG. 6 is a side view illustrating a layout of a side window of the conventional forklift truck, which has a curved front window.

FIG. 7 is a front view showing a conventional sliding opening / closing window.

FIG. 8 is a sectional view taken along line CC of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Opening 3 ... Frame edge 4 ... Wind glass 6 ... Parallel link mechanism 7,8 ... First link 10,11 ... Second link 14,15 ... Gear 18 ... Handle 19 ... Gear train

Claims (1)

[Claims] 1. A parallel link mechanism supports a window glass arranged to overlap an outer peripheral surface of a peripheral portion of an opening formed in a body so as to be displaceable in a vertical direction or a front-back direction, and the parallel link mechanism. A cabin window opening / closing device for an industrial vehicle, in which a gear that rotates integrally with a link is set at a rotation fulcrum portion with respect to the body side, and the gear can be driven by a rotation driving force input means installed on the body side.