GB2385371A

GB2385371A - A frame for detachably mounting a pane of glass

Info

Publication number: GB2385371A
Application number: GB0203536A
Authority: GB
Inventors: Chun Jin Yun
Original assignee: Volvo Construction Equipment AB
Current assignee: Volvo Construction Equipment AB
Priority date: 2002-02-14
Filing date: 2002-02-14
Publication date: 2003-08-20
Anticipated expiration: 2022-02-14
Also published as: GB0203536D0; GB2385371B

Abstract

An apparatus for preserving a subglass 100 on an inner surface of a driving room door for heavy equipment comprising: a lower bracket 1 forming a mounting groove, a pane of glass 100 inserted into mounting groove, an upper bracket 2 supporting a portion of the inner surface of the glass and a locking apparatus 3 which locks the glass against the upper bracket. Locking apparatus may include a fixing member attached to the inner surface of the driving room door, a handle the end of which is rotatably engaged to the fixing member, and a support member which supports the outer surface of the glass. A limiting rod and compression spring may be the locking mechanism for the handle, the spring retaining the rod in a groove unless pressure is applied to the end of the rod to make it clear the groove and let the handle rotate.

Description

APPARATUS FOR PRESERVING SUBGLASS OF DRIVING

ROOM OF HEAVY EQUIPMENT

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus for preserving a subglass of a driving room of a heavy equipment which is installed in an inner side of an entrance door of a driving room and is capable of safely preserving a subglass in a driving room in the case that a subglass which is detachably installed in a lower portion of a front surface of a driving room of a heavy equipment is separated based on a working environment.

2. Description of the Background Art

Generally, as shown in Figure 1, in a conventional apparatus for preserving a subglass of a driving room of a heavy equipment, in the case that a subglass 100 which is detachably installed in a lower portion of a front surface of a driving room 10 is separated based on a working environment, the subglass 100 is overlaid with a rear glass 11 using a locking apparatus 20 or is fixed in an inner surface of a panel(not shown) which forms the driving room 100.

In the drawings, reference numeral 12 represents a control box having a driving control adjusting lever of a heavy equipment.

In the conventional apparatus for preserving a subglass of a driving room of a heavy equipment capable of overlaying the subglass 100 with the rear glass 1 1 of the driving room 10 for thereby preserving the subglass, in the case that the heavy equipment has an accident and is inverted while preserving the subglass in the above manner, a driver of the heavy equipment must avoid the above accident. In this case, since the subglass is positioned directly above the head ofthe driver, the subglass is directly dropped onto the upper body of the driver due to an external impact applied to the subglass, so that the driver may receive a critical damage. In addition, in order to preserve the subglass, when

the subglass 100 of a weight of 67kg is preserved in a narrow driving room, the subglass may be dropped, so that the driver may be damaged.

In another conventional apparatus for preserving a subglass of a driving room of a heavy equipment in which the subglass is preserved in a side of the driving room, in the case that an apparatus is installed for preserving a subglass of a driving room of a heavy equipment, an inner width(920mm) of a driving room of a heavy equipment must meet the requirement of the ISO. In addition, a sharp corner portion of the subglass is always near the driver, so that a certain accident may occur. Since the subglass is positioned at the height similar with the height of the head of the driver, the driver may be critically damaged due to a particle of the broken subglass.

SUMMARY OF THE INVENTION

Accordingly, it is a first object of the present invention to provide an apparatus for preserving a subglass of a driving room of a heavy equipment which overcomes the problems encountered in the conventional art.

It is a second object of the present invention to provide an apparatus for preserving a subglass of a driving room of a heavy equipment which is capable of safely preserving a subglass of a driving room of a heavy equipment installed in a lower portion of a front surface of a driving room of a heavy equipment and is separated based on a working environment and is capable of decreasing a damage in the case that an accident occurs and implementing an easier attaching and detaching operation of a subglass.

To achieve the above objects, there is provided an apparatus for preserving a subglass of a driving room of a heavy equipment which includes a lower bracket which is attached to a lower portion of an inner surface of an entrance door of a driving room and forms a mounting groove which is upwardly opened for inserting a lower portion of the subglass therein and supports the subglass inserted in the mounting groove, an upper bracket which is installed on the upper portion of the lower bracket in an inner surface of the entrance door of the driving room and supports an upper portion of the inner surface of the subglass inserted in the lower bracket, and a locking apparatus which is installed in an upper portion of the inner surface of the entrance door of the driving room and detachably supports an upper portion of the outer surface of the subglass closely contacted with the

upper bracket in a state that it is inserted in the mounting groove of the lower bracket in the apparatus for preserving a subglass of a driving room of a heavy equipment installed for temporarily preserving a subglass of a driving room of a heavy equipment in a certain temporary portion of a driving room.

The locking apparatus includes a fixing member attached to an inner surface of the entrance door of the driving room, a handle in which a rear end of the same is rotatably engaged to the fixing member, a support member which is protruded from an inner surface of the handle and is integrally rotated with the handle and support an outer surface of the subglass, and a handle limiting means for limiting the rotation of the handle.

The handle limiting means includes a limiting rod which has one end axially engaged with the fixing member based on a rotation and axial direction movement and the other end engaged with the handle based on an axial direction movement for thereby rotatably fixing the handle to the fixing member based on a downward rotation in a limited angular range, and a compression spring which elastically supports the limiting rod with respect to the fixing member and controls the axial direction movement of the limiting rod so that the engaging shoulder portion formed in the limiting rod is inserted in the engaging groove ofthe fixing member at a maximum downward rotation angle of the limiting rod.

BRIEF DESCRIPTION OF THE-DRAWINGS

The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein; Figure 1 is a lateral cross-sectional view and back view illustrating a driving room of a heavy equipment in which a conventional apparatus for preserving a subglass of a driving room of a heavy equipment is installed; Figure 2 is a lateral cross-sectional view illustrating a driving room of a heavy equipment in which an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention is installed; Figure 3 is a cross-sectional view taken along line II-II of Figure 2; Figure 4A is a front view illustrating a subglass of an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention;

Figure 4B is a cross-sectional view taken along line X-X of Figure 4A; Figure 5A is a front view illustrating an upper bracket of an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention; Figure SB is a cross-sectional view taken along line Y-Y of Figure 5A; Figure 6A is a lateral view illustrating a locking apparatus of an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention; Figure 6B is a view illustrating an operation of an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention; Figure 7A is a lateral cross- sectional view which illustrates a handle locking state of an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention and which is taken along line VII-VII of Figure 6A and is a back view of the same; Figure 7B is a lateral cross- sectional view which illustrates a handle unlocking state of an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention and which is taken along line VII-VII of Figure 6A.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The preferred embodiments of the present invention will be explained with reference to the accompanying drawings.

As shown in Figures 2 and 3, an apparatus for preserving a subglass of a driving room of a heavy equipment is constructed in such as a manner that in the case that a subglass is separated based on a working environment, the subglass is safely preserved.

The apparatus for preserving a subglass of a driving room of a heavy equipment includes a lower bracket 1 which is attached to a lower portion of an inner surface of a driving room entrance room 13 and forms a mounting groove la which is upwardly opened, an upper bracket 2 which is installed in the upper portion of the lower bracket 1 and to which a buffering material 2a of a rubber material is attached on the surface of the same, and a locking apparatus 3 which is fixed to the driving room entrance door 13 together with the upper bracket 2 and locks and unlocks the subglass 100 inserted between the lower bracket

:ó s 1 and the upper bracket 2. The upper bracket 2 is installed in a portion lower than the waist of the driver when the driver seats for preventing the driver from being damaged by the subglass 100 when an accident occurs.

As shown in Figures 3 and 4, the lower bracket 1 is fixedly attached to a lower portion of the inner surface of the driving room entrance door 13 and forms the mounting groove la which is upwardly opened and supports the lower portion of the subglass 100 inserted in the mounting groove la. Preferably, the lower bracket 1 is formed of a rubber material for protecting the subglass 100 from an external impact. The mounting groove la is formed in such a manner that a torque is applied in the outward direction with respect to the subglass 100 inserted in the mounting groove la.

As shown in Figures 3 and 5, the upper bracket 2 supports an upper portion of an inner surface of the subglass 100 which is inserted in the subglass I and is closely contacted in the direction of the driving room entrance door 12 and has a buffering material 2a formed of a rubber material for absorbing an external impact in a surface contacting with the subglass 100.

As shown in figure 3, the locking apparatus 3 contacts with the surface of the upper bracket 2 and is fixed to the entrance door 13 together with the upper bracket 2. As shown in Figures 6A and 6B, the locking apparatus 3 includes a fixing member 31 attached to an inner surface of the entrance door 13 together with the upper bracket 2, a handle 30 which is installed in the fixing member 31 and rotatable in a limited angular range, a limiting member for selectively limiting the rotation of the handle 30, and a support member 32 which is protruded from an inner surface of the handle 30 and directly supports an upper portion of the outer surface of the subglass 100 and is formed of an elastic material. As shown in Figures 7A and 7B, the handle limiting member includes a limiting rod 33 which is inserted in a through hole 3 la formed in the center of the fixing member 31 and rotatably engages the handle 30 engaged to the end portion of the same to the fixing member 31, and a compression spring 34 which elastically supports the limiting rod 33 with respect to the fixing member 31.

An escape prevention shoulder portion 33a is installed in a rear end of the limiting rod 33 for preventing an escape of the limiting rod 33. An engaging shoulder portion 33b is

protruded in an axial direction and is formed in one side of the escape prevention shoulder portion 33a. In addition, an engaging groove 3 lb which has the same phase as the engaging shoulder portion 33b at a maximum downward rotation angle of the limiting rod 33 is formed in the fixing member 31.

In the handle limiting members 31b, 33, 34 and 33b, in the case that the handle 30 is downwardly rotated in maximum, namely, in the case that the support member 32 which is rotated together -with the handle 30 supports an outer surface of the subglass 100 inserted in the lower bracket 1, as shown in Figure 7A, the engaging shoulder portion 33b ofthe limiting rod 33 rotated together with the handle 30 and the engaging groove 31b of the fixing member 31 are same. Therefore, the driving rod 33 is moved in an axial direction by an elastic force of the compression spring 34, and the engaging shoulder portion 33b of the limiting rod 33 is inserted into the engaging groove 31b of the fixing member 31 for thereby limiting the limiting rod 33 with respect to the fixing member 31, so that the handle 30 is not rotated.

In the thusly constituted apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention, the subglass 100 separated from the lower portion of the front surface of the driving room of the heavy equipment is engaged or disengaged in the inner surface of the driving room entrance door 13 in the following method. In the case that the subglass 100 is separated and fixed to the driving room entrance door 13 using the apparatus for preserving the subglass 100 of the d riving room of the equipment according to the present invention, first, in a state that the handle 30 is upwardly rotated in maximum, the subglass 100 is inserted into the lower bracket 1 and is pushed in the direction of the entrance door 19 SO that an upper portion of the inner surface of the subglass 100 is closely contacted with the buffering material 2a of the upper bracket 2, and the subglass 100 is temporarily fixed between the lower bracket 1 and the upper bracket 2. In this state, when the handle 30 is downwardly rotated in maximum, the front end of the support member 32 which is rotated together with Me handle 30 is closely contacted with the upper portion ofthe outer surface of the subglass 100 for thereby supporting the upper portion of the subglass 100. Therefore, the subglass 100 inserted between the upper and lower brackets is not escaped using the support member 32 of the

handle 30. At this time, in the handle limiting members 3 lb, 33, 34 and 33b, as the engaging shoulder portion 33b of the limiting rod 33 which is rotated at the maximum downward rotation angle together with the handle 30 and the engaging groove 3 lb formed in the fixing member 30 have the same phase, the limiting rod 33 is moved in the axial direction in the outward direction by an elastic force of the compression spring 34. As shown in Figure 7a, the engaging shoulder portion 33b is inserted into the engaging groove 3 lb of the fixing member 31 and is not rotated in a state that the limiting rod 33, namely, the handle 30 is limited by the fixing member 31, and the support member 32 supports the subglass 100.

On the contrary, when disengaging the subglass 100 fixed to the apparatus for preserving a subglass of a driving room of a heavy equipment, first, the front end of the limiting rod 33 which is outwardly protruded is pushed using a thumb by holding the-.

handle 30, so that the engaging shoulder portion 33b of the limiting rod 33 is escaped from the engaging groove 31b of the fixing member 31 as shown in Figure 7B. In a state that the front end of the limiting rod 33 is pressed, namely, in a state that the limiting rod 33 is in a free rotation state, when the subglass 100 is upwardly rotated along the dotted line of Figure 6B for escaping the handle 30 from the subglass 100, the support member 32 is escaped from the subglass 100 together with the handle 30 for thereby implementing a unlocking state with respect to the subglass 100. The subglass 100 which is simply inserted in the subglass 1 and is in a detachable state is lifted for thereby being escaped from the entrance door 13.

As described above, in the apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention, since it is possible to preserve a subglass of a front surface of a driving room which is separated based on a working environment is a lower portion of an inner surface of an entrance door lower than the working position of a driver, it is possible to improve a stability by decreasing a damage due to a subglass when an accident occurs. In addition, since an apparatus for preserving a subglass of a driving room of a heavy equipment according to the present invention is installed in an inner surface of the entrance door, in a state that the entrance door is opened, it is possible to engage and disengage the subglass in an outdoor, and it is possible to implement an easier locking operation and is possible to easily disengage the subglass.

As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its

spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

CLAIMS:

1. In an apparatus for preserving a subglass of a driving room of a heavy equipment installed for temporarily preserving a subglass of a driving room of a heavy equipment in a certain temporary portion of a driving room, an apparatus for preserving a subglass of a driving room of a heavy equipment, comprising: a lower bracket which is attached to a lower portion of an inner surface of an entrance door of a driving room and forms a mounting groove which is upwardly opened for inserting a lower portion of the subglass therein and supports the subglass inserted in the mounting groove, an upper bracket which is installed on the upper portion of the lower bracket in an inner surface of the entrance door of the driving room and supports an upper portion of the inner surface of the subglass inserted in the lower bracket; and a locking apparatus which is installed in an upper portion of the inner surface of the entrance door of the driving room and detachably supports an upper portion of the outer surface of the subglass closely contacted with the upper bracket in a state that it is inserted in the mounting groove of the lower bracket.

2. The apparatus of claim 2, wherein said locking apparatus includes: a fixing member attached to an inner surface of the entrance door of the driving room; a handle in which a rear end of the same is rotatably engaged to the fixing member; a support member which is protruded from an inner surface of the handle and is integrally rotated with the handle and support an outer surface of the subglass; and a handle limiting means for limiting the rotation of the handle.

3. The apparatus of claim 2, wherein said handle limiting means includes: a limiting rod which has one end axially engaged with the fixing member based on a rotation and axial direction movement and the other end engaged with the handle

based on an axial direction movement for thereby rotatably fixing the handle to the fixing member based on a downward rotation in a limited angular range; and a compression spring which elastically supports the limiting rod with respect to the fixing member and controls the axial direction movement ofthe limiting rod so that the engaging shoulder portion formed in the limiting rod is inserted in the engaging groove of Me fixing member at a maximum downward rotation angle of the limiting rod.