JPH11200693A - Window opening and closing device of cabin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a window opening and closing device of a cabin which fixes a sliding door automatically at a position even if a hand leaves a handle during window opening and closing operations and can open a window half way. SOLUTION: This window opening and closing device of a cabin has a pair of right and left roller rails 2 arranged in parallel on both sides of a window of the cabin, a sliding door 3 moving vertically along a pair of roller rails 2, and a handle 40 attached to the sliding door 3. In this case, a lock mechanism 30 of the sliding door 3 consisting of a bolt 54 which is provided by energizing in the horizontal direction by a spring 50 and is detachably engaged with a wall 15 of the cabin and an operation means 4 which is provided on the handle 40 and displaces the bolt 54 inward against the energizing force to release the engagement, is provided on the sliding door 3.

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 suitable for a front window of a cabin of a construction machine such as a crane truck and a power shovel.

[0002]

2. Description of the Related Art A front window of a cabin of a construction machine is provided with a glass screen which is formed in the front of the cabin and moves vertically and also moves forward and backward. A pair of left and right roller rails are fixed to both sides of the front window, and a pair of upper and lower pulleys are attached to both sides of the glass shoji. The pair of upper and lower pulleys are fitted into the left and right roller rails and roll, so that the glass shoji moves vertically and also slides forward and backward.

[0003] The front window is opened or closed manually or electrically. In the case of manual operation, a handle is attached to the center of the lower end of the inner surface of the glass shoji. ) Or lower (close window). A balancer using a spring such as a spiral spring is used to reduce the pulling operation force and reduce the speed when pulling down the glass shoji. The connection between the balancer and the glass shoji is made by connecting the balancer with the axles of the pulleys on both sides of the lower end of the glass shoji.

[0004]

A conventional cabin window opening and closing device does not have a lock mechanism for fixing a shoji on the way. For this reason, if the user removes his hand from the handle during the operation of opening or closing the window, there is a problem that the shoji is closed by its own weight or the shoji cannot be opened halfway. An object of the present invention is to provide a cabin window opening / closing device in which a shoji is automatically fixed at that position even when a hand is released from a handle during the operation of opening or closing a window, and the window can be opened halfway. is there.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a pair of left and right roller rails mounted parallel to both sides of a window of a cabin, a sliding door moving vertically along the pair of roller rails, and a sliding door. In a cabin window opening and closing device having a handle for raising and lowering the shoji by being gripped by an operator who opens and closes the window, the shoji is urged by urging means and the shoji is moved to a wall or a roller rail of the cabin. A lock mechanism comprising an engaging member which is releasably engaged and an operating means provided on the handle for displacing the engaging member against the urging force to release the engagement is provided. Features.

[0006]

According to the present invention, when the hand is released from the handle during the operation of opening and closing the window, the urging means engages the engaging member with a fixed member such as a cabin wall or a roller rail. For this reason, it is possible to prevent the sash from falling due to its own weight and close the window, and to fix the sash at a desired position.

[0007]

FIG. 1 shows a construction machine, and 1 is a cabin thereof. A slightly inclined and curved front wall 11 and a roof 12 of the cabin 1 are connected by a cylindrical curved surface 13, and the front wall 11 has a substantially rectangular curved front window 10.
Are formed. Curved rails 2 are fixed in parallel along the left and right sides of the ceiling 14 which is the lower surface of the roof 12 from the left and right sides of the front window 10.

The rails 2, 2 are, as shown in FIGS.
A roller rail 21 having a substantially U-shaped cross section is formed by bending an iron plate, and a smaller wire guide groove 22 having a substantially U-shaped cross section is continuously formed below the roller rail 21. The rails 2 and 2 are opposed to each other with the opening sides of the roller rail 21 and the wire guide groove 22 inside.

On the front window 10, a glass shoji 3 which is curved in accordance with the degree of curvature of the front wall 11 is mounted so as to be freely opened and closed. The glass shoji 3 has two pairs of lower and upper rollers 32, 32 and 33, 33 on both sides of a shoji frame 31, and these four rollers 32, 33 are rollably fitted to the roller rails 21, 21. . Lower pair of rollers 32, 32
Is rotatably attached to the axles 34, 34.

As shown in FIGS. 1 and 2, a pair of left and right balancers 23, 23 for smoothly opening and closing the glass shoji 3 is mounted behind the ceiling 14. As shown in FIG. The balancers 23, 23 are connected to the axles 34, 34 by a pair of wires 24, 24. In this embodiment, as shown in FIG. 2, the axle 34 and one end of the wire 24 are connected via a strip-shaped connecting member 26 having an elongated hole 25 through which the axle 34 is inserted.

Each of the wires 24, 24 has a wire guide groove 2
2 and 22 are slidably disposed in the glass shoji 3
Are urged upward and backward by the balancers 23, 23. Note that the number of the balancers 23 may be one. In this case, the wires 24 are turned by pulleys or the like and connected to one balancer 23.

The urging force of the balancers 23, 23 pulls the glass shoji 3 upward and reduces the operation force for opening the front window 10. The operation of pulling down the glass shoji 3 and closing the window is against the urging force of the balancers 23, 23. For this reason, braking is applied to the speed of the glass shoji 3 when closing the glass shoji 3, and the problem that the front window 10 closes rapidly due to the combination of the operating force and gravity is eliminated.

The glass shoji 3 is provided with a lock mechanism 30 for the glass shoji 3 attached to the lower frame member 35 of the shoji frame 31 or the like. The lock mechanism 30 is operated by the operating means 4 including a handle 40 protruding into the cabin 1 and the glass shoji 3 is fixed to a fixed member such as the left and right side walls 15, 15 or the roller rail 21 of the cabin 1. And engaging means 5 for removably fixing.

In the lock mechanism 30 according to the first embodiment,
As shown in FIGS. 3 and 4, the operating means 4 includes a bracket plate 41 fastened to the center of the lower frame member 35,
1 has a rotating disk 43 whose center is rotatably supported by a supporting shaft 42 protruding therefrom. A handle 40 is fixed to the rotating disk 43, and cycloidally curved cam holes 44, 44 are provided.

The engaging means 5 is provided on both left and right sides of the operating means 4, and is provided with engaging members 51, 51 which are detachably engaged with the left and right side walls 15, 15 of the cabin 1; 5
A spring 50 is provided as urging means for urging the first and the 51 in the outward direction. In this embodiment, the engaging members 51, 5
1 is a bracket 53 with a holding cylinder 52 fastened to the inner side surfaces of the left and right lower frame members 35 of the bracket plate 41.
And horizontal bars 54, 54 slidably inserted through the holding cylinders 52, 52. Bar 54 as an engaging member
Although a wire, a belt, a strip, etc. can be used besides a bar. Further, as the urging means, besides the spring 50, an urging body such as a disc spring, a leaf spring, an elastic body such as rubber, a combined body of a piston and a cylinder filled with a compressible fluid, or the like can be used.

The inner ends 5A of the bars 54, 54 are bent in a key shape and inserted into the cam holes 44, 44 and connected.
At the outer ends of the bars 54, 54, friction members 55, 55 such as rubber are provided.
Is fixed. The holding cylinders 52, 5
2 and the friction bodies 55, 55, the springs 50, 5
Numeral 0 is provided to urge the bars 54, 54 outward (to the left and right). In this embodiment, a pair of engagement means 5 is provided on the left and right, but only one of them may be provided.

The lock mechanism 30 operates as follows. Normally, the bar 50 is urged outward by the spring 50, and the friction body 55 is pressed against the wall surfaces of the left and right side walls 15, 15, and the glass shoji 3 is frictionally moved by the friction.
15 fixed. When moving the glass shoji 3, if the user grips the handle 40 and twists in the counterclockwise direction in FIG. 3, the springs 50, 50 are compressed, and the bars 54, 54 are displaced inward in the drawing. As a result, the engagement between the friction bodies 55, 55 and the left and right side walls 15, 15 is released, and the glass shoji 3 can slide up and down or back and forth.

The lock mechanism 30 operates as follows. If the hand is inadvertently released from the handle 40 during the operation of opening and closing the window, the springs 50, 50
4 to the outside, the friction bodies 55, 55
5 and 15 are pressed. As a result, the glass shoji 3 is locked (fixed) by the friction between the friction bodies 55, 55 and the side walls 15, 15.

Therefore, it is possible to prevent a problem that the glass shoji 3 descends due to its own weight and the window is inadvertently closed. In addition, the glass shoji 3 can be fixed at a desired position, and the window can be half-opened. In addition, even when the wire 24 comes off or the balancer 23 breaks down, the safety is high because the friction members 55 are locked (fixed) by the friction between the friction members 55 and the side walls 15.

FIG. 5 shows bars 54, 54 and left and right side walls 15,
15 shows another embodiment of the engagement means 5 with the engaging means 15. In this embodiment, the engaging means 5 has fitting portions 56, 56 at the other ends (outer ends) of the bars 54, 54. The right and left side walls 15, 15 have fitting holes 5 with which the fitting portions 56, 56 are removably engaged.
The strips 58, 58 on which 7, 57 are arranged are fixed. In this configuration, since the lock mechanism 30 can firmly fix the glass shoji 3 to the left and right side walls 15, there is an advantage that safety is improved.

FIG. 6 shows the bars 54, 54 and the left and right side walls 15,
15 shows still another embodiment of the engagement means 5 with the engaging means 15. In this embodiment, the engaging means 5 is provided with blocks 46, 46 having wavy uneven surfaces 45 at the other ends (outer ends) of the bars 54, 54. On the left and right side walls 15, 15, an uneven surface 45,
Corrugated uneven surfaces 47, 47 meshing with 45 are provided. In this configuration, the engagement force of the lock mechanism 30 can be increased, and the fixing position of the glass shoji 3 can be set freely.

FIG. 7 shows a second embodiment of the lock mechanism 30. In this embodiment, the operating means 4 includes a support shaft 42 projecting from a bracket plate 41 fastened to the center of the lower frame member 35.
Has a rotating strip 48 pivotally supported at its center.
A handle 40 is provided on the rotating strip 48, and inner ends of link members 49, 49 are rotatably connected to both ends, and outer ends of the link members 49, 49 are inner ends of the bars 54, 54. Is rotatably connected to the This configuration also has the same operation and effect as the first embodiment.

FIG. 8 shows a third embodiment of the lock mechanism 30. In this embodiment, the link member 4 in the second embodiment is used.
9, a wire 491 is used, and instead of the bar 54, a fastening plate 541 fastened to the inner surface of the lower frame member 35,
An engagement plate 543 hinged to the fastening plate 541 and urged to press against the side wall 15 of the cabin by a torsion spring 542 is used. The engagement means employs the same configuration as in FIG. Also in this configuration,
It has the same function and effect as the first embodiment.

FIG. 9 shows a fourth embodiment of the lock mechanism 30. In this embodiment, the operating means 6 includes front and rear portions 62, 62 whose front ends 61, 61 are fastened to the center of the lower frame member 35.
And a substantially U-shaped handle 60 provided with a grip portion 63 connecting the rear ends of the front and rear portions. The handle 60 is a hollow part in which the grip part 63 is opened inward (front side).
The grooves 2 and 62 are provided with grooves that open inward.

A movable piece 64 that reciprocates in the front-rear direction is disposed inside the handle 60.
It is possible to enter and exit the hollow part from the opening of
Both ends 65, 65 are slidably supported in grooves opened inside the front and rear parts 62, 62. To both ends 65, 65, one ends of flexible bands 66, 66 formed of a leaf spring material or the like are connected. The flexible belts 66, 66 are provided with pulleys 67, 67 attached to the front ends of the grooves opened inside the front and rear portions 62, 62.
, And the other end is connected to the inner end of the bars 54, 54.

When the operating means 6 grips the handle 60, the movable piece 64 enters the hollow portion through the opening of the gripping portion 63, and in conjunction with this movement, the flexible bands 66, 66 are pulled in the forward direction. , 54 are displaced inward to release the lock. In this configuration, the operation of twisting the handle is not required, so that the operability is excellent.

FIG. 10 shows a fifth embodiment of the lock mechanism 30. In this embodiment, the operating means 7 has a handle 70 attached to the center position of the lower frame member 35 of the glass shoji 3.
The handle 70 has a U-shape, and the front ends of both sides 71, 71 are attached via brackets 72, 72 so as to be rotatable around a horizontal axis.

The brackets 72 are provided with pulleys 73 having a longitudinal axis. Both sides 7
One end of each of the flexible wires 74, 74 is connected to an intermediate position between the first and the first wires 71. The other end of each of the flexible wires 74, 74 is connected to a pulley 73,
The other end is turned about 90 degrees by 73,
4 is connected to the inside end.

In this configuration, when the handle 70 is turned in the lower direction, the flexible wires 74 are pulled in the forward direction,
The bars 54 are displaced inward to release the lock. Also in this configuration, the operation of twisting the handle is not required, so that the operability is excellent.

FIG. 11 shows a sixth embodiment of the lock mechanism 30. In this embodiment, a pair of lower rollers 32, 32
Are provided at the tips of the bars 54, 54, and the rollers 3
Friction bodies 55, 55 are fixed to the outer surfaces of 2, 32.
The friction bodies 55 are pressed by the side walls 27 in the roller rails 21 to be locked. With this configuration, there is an advantage that it is not necessary to employ a special structure for the side wall 15 of the cabin 1 and it can be simply formed.

FIG. 12 shows a seventh embodiment of the lock mechanism. In this embodiment, the rollers 32,
32 and the fitting portions 56 and 56 are projected outside the
The fitting holes 5 are formed in the side walls 27, 27 in the roller rails 21, 21.
7, 57. In this configuration, there is no need to employ a special structure for the side wall 15 of the cabin 1, and there is an advantage that it can be formed simply.

[Brief description of the drawings]

FIG. 1 is a schematic view of a cabin of a construction machine.

FIG. 2 is a front view of the front window opening / closing device of the cabin.

FIG. 3 is a perspective view of a glass shoji and a lock mechanism.

FIG. 4 is a perspective view of a lock mechanism.

FIG. 5 is a perspective view of an engagement mechanism according to another embodiment.

FIG. 6 is a perspective view of an engagement mechanism according to still another embodiment.

FIG. 7 is a perspective view of a lock mechanism according to a second embodiment.

FIG. 8 is a perspective view of a lock mechanism according to a third embodiment.

FIG. 9 is a perspective view of a lock mechanism according to a fourth embodiment.

FIG. 10 is a perspective view of a lock mechanism according to a fifth embodiment.

FIG. 11 is a perspective view of a lock mechanism according to a sixth embodiment.

FIG. 12 is a perspective view of a lock mechanism according to a seventh embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabin 10 Front window 15 Left and right side wall of cabin 2 Rail 21 Roller rail 3 Glass shoji 30 Lock mechanism 31 Shoji frame 35 Lower frame member 4, 6, 7 Operating means 40, 60, 70 Handle 42 Support shaft (fulcrum) 43 Rotation Disk 44 Cam hole 45 Uneven surface (engaging portion) 47 Uneven surface (engaging portion) 48 Rotating strip 5 Engaging means 50 Spring (biasing means) 54 Bar 56 Insertion portion (engaging portion) 57 Hole (engaging portion) 66 flexible band 74 flexible wire (link member) 541 fastening plate 542 torsion spring 543 engagement plate

Claims (11)

[Claims] 1. A pair of left and right roller rails mounted in parallel on both sides of a window of a cabin, a sliding door moving up and down along the pair of roller rails, and an operation of opening and closing the window mounted on the sliding door. A cabin window opening / closing device having a handle for raising and lowering the shoji by grasping by a person, wherein the shroud is urged by urging means and engages the shoji with a wall or a roller rail of the cabin in a detachable manner. A cabin window opening / closing device, further comprising a lock mechanism comprising a joining member and an operating means provided on the handle for displacing the engaging member against the urging force to release the engagement. . 2. The cabin window opening and closing device according to claim 1, wherein the operating means is a rotating member attached to the shoji so as to be rotatable around a longitudinal axis and provided with the handle. The engaging member is mounted so as to be displaceable beside the rotating member, one end is connected to the rotating member, and is displaced in conjunction with the rotation of the rotating member, and the other end is a wall of the cabin or The bar is an engagement portion with a roller rail, and the biasing means is a biasing body such as a spring that biases the bar in the direction of the wall of the cabin or the roller rail. Cabin window opener. 3. The cabin window opening and closing device according to claim 2, wherein the operating means is a rotating member rotatably attached to a substantially central portion of the shoji and provided with the handle. The engaging member is displaceably attached to both sides of the rotating member, one end is connected to the rotating member, and is displaced in conjunction with the rotation of the rotating member, and the other end is a wall of the cabin or A cabin window opening / closing device, comprising a pair of left and right bars serving as engagement portions with a roller rail. 4. The cabin window opening / closing device according to claim 3, wherein the rotating member is a plate member having a fulcrum at the center, and a pair of cycloid curved cam holes is formed in the plate member. A cabin window opening / closing device, wherein one ends of a pair of bars are slidably fitted in the cam holes. 5. The cabin window opening / closing device according to claim 3, wherein the rotating member is a plate member having a fulcrum at the center, and one end of the rotating member and the engaging member has the plate member. A cabin window opening and closing device, wherein the other end is connected by a link member rotatably connected to one end of the engaging member. 6. The cabin window opening / closing device according to claim 1, wherein the operating means is a reciprocating member that reciprocates by an operation of gripping and releasing the handle, and the engaging member is a reciprocating member. One end is connected to the reciprocating member by a flexible band and is displaced in conjunction with the reciprocating movement of the reciprocating member, and the other end is connected to the reciprocating member by a flexible band, and the other end is connected to the cabin wall or the roller rail. Wherein the biasing means is a biasing body such as a spring for biasing the bar in the direction of the cabin wall or the roller rail. apparatus. 7. The cabin window opening / closing device according to claim 1, wherein the operating means is the handle rotatably attached to the shoji so as to be rotatable around a horizontal axis. One end is connected to the handle via a flexible wire and is displaced in conjunction with the rotation of the handle, and the other end is connected to the wall of the cabin or the roller rail. A cabin serving as a joining portion, wherein the urging means is an urging body such as a spring for urging the bar in the direction of the wall of the cabin or a roller rail; . 8. The engaging portion of the engaging member according to claim 1, wherein the engaging portion is a friction member, and is engaged with the roller rail or the cabin wall by friction. Cabin window opener. 9. The engaging portion of the engaging member according to claim 1, wherein the engaging portion is an uneven surface provided on an end face, and is engaged with the roller rail or the uneven surface provided on a wall of the cabin. A cabin window opening / closing device, comprising: 10. The engaging portion of the engaging member according to claim 1, wherein the engaging portion is a fitting portion, and the fitting portion engages with a recess provided in a wall of the roller rail or the cabin. Characteristic cabin window opening and closing device. 11. The cabin window opening / closing device according to claim 1, wherein the engaging member is hinged to a fastening plate fastened to a side portion of the shoji and to the fastening plate. And an engaging plate urged against the cabin wall or the roller rail by a torsion spring, and the engaging plate is connected to the operating means by a connecting member such as a wire, a belt, a strip, or a bar. Cabin window opening and closing device characterized by the above-mentioned.