JPH09263124A - Window frame structure for emergency escape from working machine cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate release of fixing of a window frame member during emergency escape by a method wherein a fixing means fixing a window frame member approximately in the same shape as that of an opening formed in the side wall of a working machine cab consists of a belt-like nipping body, and key means to release nipping is arranged at a part thereof. SOLUTION: A window for emergency escape formed in the rear of a cab is structured such that a window frame 11 is fixed at an oblong opening. Reinforcing window glasses 17 are openably fitted in a bouble sliding manner. When the so formed window frame 11 is attached, the window frame 11 is overlapped with the window mounting part 13 of an opening from the outside of the cab and temporarily locked. After an elongated member 31 to which a handle 33 is bound by a string 35 is covered in a proper position, one end part of a belt-like nipping body 19 is fitted in and nipped from a position above the elongated member 31 and fitted, in order, in the whole periphery of the window frame 11. When, during the occurrence of emergency, the window frame 11 is removed for escape, the two end parts of the belt-like nipping body 19 are removed through the elongated member 31 by grasping a handle 33 for pulling, and the belt-like nipping body 19 is removed from the window frame mounting part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a window frame mounting structure for emergency escape from a working machine cab of a construction machine such as a hydraulic excavator.

[0002]

2. Description of the Related Art A conventional construction machine working machine is operated and operated by an operator. The work machine is provided with an operation room (small room) called a cab in order to protect an operator who is working from outside danger and environment. The cab is usually surrounded by a strong metal wall such as a steel plate on all sides and the ceiling, and a side wall is provided with a door for getting on and off the cab. Further, glass windows for monitoring the surroundings are provided on the front, rear, left and right side walls.

In an emergency such as when the working machine is laid down due to an erroneous operation of the operator's operation or an accident, the operator cannot always open the door for getting on and off to escape from the cab. Further, even if the window glass is broken and escaped, the window glass uses tempered glass, a special tool is required, and further, it is considered that an injury may be caused by broken glass, which is preferable as an emergency escape method. No

Therefore, various measures have been conventionally made for emergency escape. For example, Japanese Utility Model Laid-Open No. 7-27913 discloses a window plate mounting structure for an emergency escape. FIG.
Shows this window plate mounting structure. FIG. 6A shows the window plate 5.
3 shows a cross section of the airtight member 52 in which 3 is fixed to the cab side plate 51, FIG. 6 (B) shows a cross sectional view of a state where the ring-shaped knob body 61 is provided on the support member 60, and FIG. 6 (C) shows the ring-shaped knob. The sectional view of the state where the body 61 is pulled out and the support member 60 is removed is shown.

In FIG. 6 (A), a cab rear side plate 51 is provided with a large substantially rectangular window hole (not shown), and an airtight material 52 is fitted along the inner peripheral edge 50 of this window hole. Further, a window plate (window glass) 53 is fitted inside the airtight member 52 by fitting. The airtight member 52 is made of a rubber-like elastic material formed of a flexible resin material such as natural rubber or synthetic rubber. The airtight member 52 is a band-shaped member having a substantially circular cross section, and has an inner peripheral edge. A first fitting groove 54 for fitting with the window plate 53 is provided, and a second fitting groove 55 for fitting with the window hole edge 50 of the cab rear side plate is provided on the outer peripheral edge.

Further, as shown in FIG. 6C, a wedge-shaped notch groove (generally V-shaped groove) 56 is formed in the airtight member 52 in a state where it is open to the inside of the cab. 54 and the second fitting groove 55 are formed deeper than the second fitting groove 55. Further, the retaining groove 57, 58 is formed on both sides of the line connecting the first fitting groove 54 and the second fitting groove 55. Has been formed. on the other hand,
The support member 60 having a small protrusion having substantially the same shape as the wedge-shaped notch groove 56 is fitted over the wedge-shaped notch groove 56 over substantially the entire circumference to prevent the airtight member 52 from being deformed. As shown in FIG. 6 (B), a ring-shaped knob 61 that protrudes toward the inside of the cab is provided at one location of the support member 60. Only this portion facilitates extraction,
No small protrusion is provided.

This window plate mounting structure is constructed as described above, and as shown in FIGS. 6 (A) and 6 (B), the airtight member 5 is always provided.
The window plate 53 is fixed to the cab rear side plate 51 by 2. At the time of emergency evacuation, the ring-shaped knob 61 is pulled and the support member 60 is pulled out so that the state shown in the right side of FIG. 6C is obtained. From the state of FIG. 6C, the airtight material 55 is shaken vertically and horizontally to remove the window plate from the airtight material 55, and the operator escapes from there.

[0008]

As described above,
In the above-described emergency escape window frame structure, it is necessary to remove the window glass (window plate) from the airtight material after removing the supporting member. That is,
It is necessary to perform two steps, an operation of removing the support member and an operation of removing the window glass from the airtight material, and it may be confusing to correctly perform the plurality of steps in an emergency situation. There is. Furthermore, it is necessary to remove the window glass from the first fitting groove of the airtight material, but since the second fitting groove of the airtight material is fitted over the entire circumference of the window hole edge portion of the rear side plate, it may be moved up or down or There is a problem that it cannot shake right and left and it takes time to remove the window glass. In particular, when some rubber material of the airtight material is adhered to the window glass due to non-use for a long period of time, this operation requires a long time, which is a big problem. An object of the present invention is to provide an emergency escape window frame structure that is easy to operate.

[0009]

In order to solve the above problems, the invention of a window frame structure for emergency escape from a working machine cab according to claim 1 is to provide an opening in a side wall of the working machine cab, In a window frame structure for fixing a window frame member of substantially the same shape to the opening, the fixing means overlaps the peripheral edge of the window frame member with the peripheral edge of the opening, and holds the overlapped peripheral edge portion over substantially the entire circumference. It is characterized in that it is formed of a sandwiching body, and a clue means for releasing the sandwiching is provided in a part of the sandwiching body or in the vicinity thereof. In this invention, the window frame member is fixed to the opening of the cab side wall by the strip-shaped holding body,
A clue means for releasing the clamp is provided in a part of or around the clamp body. Therefore, when the holding is released by using the clue means, the window frame member is released from the fixed state and the opening is opened. The operator can escape through the opening.

[0010] The invention described in claim 2 is the same as the claim 1.
In the invention, the band-shaped holding body is formed of an elastic body having a U-shaped cross section, and the holding is performed by inserting the opening peripheral edge and the peripheral edge of the window frame member into the U-shaped recessed portion so as to overlap each other. ing.

Further, the invention according to claim 3 is the same as claim 2
In the invention described above, the U-shaped elastic body is composed of a metal U-shaped elastic core material made of metal and coated with rubber or synthetic resin. In this invention, a U-shaped metal elastic body is used as the core material, and the outside is covered with a soft elastic body such as rubber. Since a metal elastic body is used for the core material, the clamping force can be adjusted significantly, and even if a large force is applied when releasing the clamping, the band-shaped clamping body will be torn off, and a part of the clamping body. Does not remain.

The invention described in claim 4 is the first invention.
In the invention according to any one of claims 3 to 3, a substantially U-shaped elongated member is embedded between the lower side surface of the holding body and the upper surface of the peripheral edge portion overlapped with each other at a position where the both ends of the holding body are abutted, and Alternatively, a handle member that is entirely exposed to the outside is connected to the elongated member. Part or all of the handle member is exposed, and the handle member is connected to the elongated member. In addition, the elongated member is a part where both ends of the strip-shaped holding member are abutted,
And it is buried inside. Therefore, when the grip portion is grasped and pulled by hand, the sandwiching at both end portions of the strip-shaped sandwiching body is released, and a clue for removing the entire sandwiching is obtained.

Further, in the invention according to claim 5, in the invention according to claims 1 to 3, the clue means is formed by providing handle members at both ends of the holding body.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a side view of the cab, and FIG.
(B) shows a rear view. FIG. 2 is a diagram showing a window frame in which the present invention is implemented. FIG. 3 is a perspective view showing a clue means provided in the portion A of FIG. FIG. 4 is a partial sectional view taken along line XX of FIG. FIG. 5 is a cross-sectional view of the strip-shaped holding body.

In FIG. 1, a cab 1 is fixed on an upper swing body 3 of a working machine. The cab 1 is surrounded on all sides by a metal plate such as a steel plate. On the side surface of the cab 1, a door 5 for getting on and off the cab is provided so as to be openable and closable, and a window glass 7 is provided at an appropriate place. . An emergency escape window 9 is provided on the rear surface of the cab 1 (see FIG. 1).
(B)).

As shown in FIG. 2, the emergency escape window 9 is a rectangle having a size that allows an operator to escape, and a rectangular opening (not shown) is formed in the rear side plate 10 of the cab 1.
Is provided, and the window frame 11 is fixed to the opening (see FIG. 4). The rear side plate 10 of the cab 1 is 2
The window frame mounting portion 13 is formed of two steel plates and is welded to each other at the peripheral edge of the opening. The window frame attachment part 13 is formed in a strip shape along a rectangular opening. The window frame 11 is made of aluminum and has substantially the same shape as the window frame mounting portion 13, and has a comb-shaped cross section having three grooves and four protrusions (see FIG. 4).

Two grooves 11a and 11b on the outside of the window frame 11
Is a groove for fitting the tempered window glass 17, and the inner groove 11
c is a space for fixing the strip-shaped projection 11d to the window frame mounting portion 13. The band-shaped protrusion 11d has the same shape as the inner peripheral edge of the window frame mounting portion 13 and is formed so as to exactly overlap with the inner peripheral edge.

The window frame 11 is fixed by stacking the window frame 11 from the outside of the cab 1 on the window frame mounting portion 13, and forcibly fitting the strip-shaped holding bodies 19 to both of the overlapped portions. To fix. The strip-shaped holding body 19 is composed of a metal core material 21 having a U-shaped cross section and a rubber coating 23 (see FIG. 5). The metal core member 21 is, for example, a thin strip-shaped steel plate that is bent into a U shape and is formed into a rectangular shape with appropriate cuts, and the gripping force is gripped when a person applies force by hand to pull it. Is adjusted to the extent that it comes off, and the strength is maintained so as not to cut when pulled.
The coating 23 is made of, for example, natural rubber or synthetic rubber that does not deteriorate over a long period of time, and has a small uneven slip stopper formed inside the U-shape. The clamping is performed over substantially the entire circumference.

Further, as shown in FIG. 3, a clue means 29 for releasing the holding is provided at one position of the holding body 19, for example, at a position where both ends of the holding body 19 are brought into contact with each other. The clue means 29 comprises a substantially U-shaped metal elongated member 31 and a handle 33 for grasping and pulling by hand, and the handle 33 is tied to the metallic member elongated member 31 with a sturdy string 35. In addition, the elongated member 31 has the window frame mounting portion 13 at substantially equal distances with the ends of the holding body 19 abutting each other.
The overlapping edge portions of the belt-like projection 11c and the belt-shaped projection 11c are covered to such an extent that they are lightly clamped, and the clamp body 1 is inserted from the upper side of the elongated member 31.
Both ends of 9 are covered to sandwich the elongated member 31.
The handle 33 is formed of an appropriate shape and material, and has a holding body 19
Is tightly tied to the elongated member with a string 35 through the gap between the butted portions.

Since this embodiment is constructed as described above, it functions as follows. That is, when mounting the window frame 11, the window frame 11 is superposed on the window frame mounting portion 13 of the opening from the outside of the cab 1 and temporarily fixed. Next, the string 3
The elongated member 31 to which the handle 33 is tied at 5 is put on the appropriate position where the elongated members 31 are overlapped. Then, one end of the band-shaped holding body 19 is fitted and held from above the elongated member 31, and the whole circumference is fitted and held in sequence. Finally, after confirming that the grip 33 is in a grippable state, the other end of the strip-shaped sandwiching body 19 is fitted to and sandwiched by the elongated member 31.

In an emergency, when removing the window frame 11 to escape,
Grasp the handle 33 and pull it. By this operation, the elongated member 31 is pulled and released, and the both ends (at least one end) of the strip-shaped holding body 19 are released. By pulling the detached ends one after another, the entire band-shaped holding body 19 is detached from the window frame attachment portion 13 of the opening. Further, since the window frame 11 also comes off, the opening opens. Therefore, it is possible to escape from the opening.
In addition, in this embodiment, since the U-shaped band member 21 is embedded as the core member in the band-shaped holding body 19, a situation in which the U-shaped band member 21 is cut when it is pulled does not occur, and the holding force is the same. Since the material 21 is appropriately adjusted by the elastic force of the material 21, it is configured so that the operator can easily remove the grip if the operator pulls it with force.

Therefore, the window frame mounting structure of this embodiment has the effect that the window frame 11 can be removed without trouble by a simple operation, and the operator can easily escape from the cab in an emergency. Also, since the core material is embedded in the band-shaped clamp body and the clamping force is adjusted, and the core material is made of a durable metal material, the clamp body comes off during the operation of removing the window frame in an emergency. Since it does not exist or is not cut off leaving a part of it, it has an effect that it functions reliably and can be used with confidence.

Although the embodiments and examples of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the above description or examples, and does not depart from the gist of the present invention. Even if the design of the range is changed, it is included in the present invention.

For example, the core material of the band-shaped sandwiching body is not always necessary, and it may be made of a material having a slightly larger cross section (strong pulling force) and a large elastic force. Further, the clue means may be directly provided at both ends of the strip-shaped holding body.
Further, the clue means may be provided at an appropriate position of the band-shaped holding body. Also, although the emergency escape window is provided on the rear side plate of the cab (this is a preferable position), it may be provided on another side plate.

[0025]

As described above, according to the present invention,
The apparatus according to the first and second aspects has an effect that the escape opening can be easily secured by only one operation of removing the strip-shaped holding body. Further, in the apparatus according to claim 3,
Since the gripping force can be adjusted in a wide range and the tensile strength of the band-shaped gripping body can be increased, there is an effect that there can be less trouble and the product can be used with confidence. Furthermore, claims 4 and 5
Since the device of (1) is provided with the handle member, the effect that the necessary operation is clear and easy can be obtained.

[Brief description of drawings]

FIG. 1A is a side view of a cab, and FIG. 1B is a rear view.

FIG. 2 is a diagram showing a window frame according to the present invention.

FIG. 3 is a perspective view showing a clue means provided in a portion A of FIG.

FIG. 4 is a partial sectional view taken along line XX in FIG.

FIG. 5 is a sectional view of a strip-shaped holding body.

FIG. 6 shows a conventional window plate mounting structure. Figure (A)
Shows a cross section of the airtight material in which the window plate is fixed to the cab side plate, FIG. (B) shows a cross-sectional view of a state where the ring-shaped knob is provided on the support member, and FIG. (C) shows the ring-shaped knob removed. A sectional view of the state where a supporting member is removed is shown.

[Explanation of symbols]

 1 Working machine cab 5 Door for getting on and off 9 Emergency escape window 10 Rear side plate 11 Window frame 13 Window frame mounting portion 19 Band-shaped holding body 21 Core material 23 Covering 29 Clue means 31 Elongated member 33 Handle (handle member)

Claims (5)

[Claims] 1. In a window frame structure in which an opening is provided in a side wall of a working machine cab and a window frame member having substantially the same shape as that of the opening is fixed to the opening, the fixing means is provided at a periphery of the opening of the window frame member. A work characterized by being composed of a band-shaped sandwiching body that overlaps the peripheral edge and sandwiches the overlapped peripheral edge portion over substantially the entire circumference, and a clue means for releasing the sandwiching is provided in a part of the sandwiching body or in the periphery thereof. Window frame structure for emergency escape from machine cab. 2. The strip-shaped sandwiching body is made of an elastic body having a U-shaped cross section, and the sandwiching is performed by inserting the opening peripheral edge and the peripheral edge of the window frame member into the U-shaped recessed portion so as to overlap each other. The window frame structure for emergency escape from a working machine cab according to claim 1, wherein the window frame structure is an emergency escape window frame. 3. The working machine cab according to claim 2, wherein the U-shaped elastic body is formed by coating a metal U-shaped elastic core material with rubber or synthetic resin. Emergency escape window frame structure. 4. The clue means embeds a substantially U-shaped elongated member between the lower surface of the sandwiching body and the upper surface of the peripheral portion at a portion where both ends of the sandwiching body are abutted, and part or all of the clueing unit is embedded. The window frame structure for emergency escape from a working machine cab according to any one of claims 1 to 3, wherein a handle member exposed to the outside is connected to the elongated member. 5. The window frame structure for emergency escape from a working machine cab according to any one of claims 1 to 3, wherein the clue means is provided with grip members at both ends of the holding body. .