JPH11286963A - Operator cab of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the visibility of a door by arranging a relay link to each lock-side end part area in a center pillar, and connecting a door closing lock and a door opening lock to the relay link through connecting members, respectively. SOLUTION: A relay link 18 rotated according to the operation of an opening and closing handle 2 is provided, a door closing lock 4 and a door opening lock 5 are connected to the relay link 18 through a fifth rod 21 and a sixth rod 22, respectively, and the relay link 18 is arranged on the rear end side of a center pillar 1c. Since the fifth rod 21 and sixth rod 22 connected to the door closing lock 4 and door opening lock 5 are connected to the relay link 18, respectively, the necessary arrangement space within the center pillar 1c to the fifth rod 21 or sixth rod 22 can be minimized as much as possible. Consequently, the vertical width dimension of the center pillar 1c can be minimized to enlarge the transparent windows arranged above and under the center pillar 1c. Thus, the visibility can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab of a construction machine having a door with a lock function, for example, in a hydraulic power shovel.

[0002]

2. Description of the Related Art For example, as shown in FIG. 4, a hydraulic excavator includes a swivel base 32 on a traveling device 31. On the swivel base 32, a cab 33, an engine room 34 and a work boom 35 are provided. Is provided. Usually, a sliding door 36 is attached to a side opening of the operator's cab 33 of the construction machine where an operator enters and exits.

As shown in FIG. 5, for example, such a door 36 has a horizontally extending center at an intermediate height between a front pillar 37 on the front edge side and a rear pillar 38 on the rear edge side which constitute a door frame. Pillars 39 are provided, and upper and lower transparent windows 40 are sandwiched between the center pillars 39.
-It is configured so that side view can be secured through 40.

[0004] Opening / closing handles 41 for opening and closing the door 36 are attached to the front pillar 37 on the inner and outer surfaces of a region where the center pillar 39 is connected. On the other hand, the rear pillar 38 is provided with a door closing lock 42 and a door opening lock 43 near the height positions of the upper edge and the lower edge of the center pillar 39, respectively.

[0005] As shown in FIG.
A lock striker 44 for closing at the rear edge of the door frame,
Opening lock strikers 45 are provided on the rear side wall surfaces, respectively. When the door 36 is closed, the door closing lock 42 is engaged with the closing lock striker 44 to prevent rattling of the door 36, and the door 36 is slid to the fully open position as shown by a dashed line in the figure. Even in the opened state, the door opening lock 43 is engaged with the opening lock striker 45 to prevent rattling of the door 36 in the fully opened state.

On the other hand, for example, Japanese Unexamined Utility Model Publication No. Hei 5-3550 discloses a configuration in which a mechanism for operating a door closing lock 42 or a door opening lock 43 by operating the opening / closing handle 41 is provided. .

FIG. 7 shows an example of such a mechanism. In the figure, reference numeral 50a denotes an inner opening / closing handle (hereinafter referred to as an inner handle) attached to the inner surface side of the door.
Reference numeral 50b denotes an outer opening / closing handle (hereinafter referred to as an outer handle) attached to the outer surface of the door. These handles 50a and 50b are respectively mounted so as to be rotatable around pivots S. A remote control 54 having an inner lever 53a and an outer lever 53b, each of which is pivotally supported by a pivot 52 at the upper end, is disposed at a substantially central position in the front-rear direction of the center pillar 51.

When the inner handle 50a is rotated as shown by an arrow in the drawing, the inner lever 53a is rotated via the first rod 55, and is thereby connected to the rear end of the inner lever 53a. The second rod 56 and the third rod 57 are pulled forward. As a result, the door closing lock 58 connected to the rear end of the second rod 56
The rear end of the door closing lock 58 is unlocked.

At the same time, the forward movement of the third rod 57 is caused by the relay link 59 and the fourth rod 6.
0 causes the rear end of the door opening lock 61 to move upward, thereby causing the door opening lock 61 to move upward.
The lock release operation also occurs.

On the other hand, when the outer handle 50b is turned as shown by the arrow in the figure, the outer lever 53b turns clockwise via the fifth rod 62. Although not shown, the outer lever 53b is formed at its rear end with a bent portion that abuts from the rear on the rear edge of the inner lever 53a. It rotates integrally with the side lever 53b. As a result, similarly to the above, the door release lock 58 and the door open lock 61 are respectively unlocked.

The remote control 54 is provided with an unlocking plate 63 overlaid on the outer lever 53b.
Is provided, and a key cylinder 64 is mounted above the side portion. By rotating the key inserted into the key cylinder 64, the locking / unlocking plate 63 is rotated.
Rotates around a pivot 66 via a sixth rod 65 arranged in the vertical direction. As a result, the outer side lever 53b
Is prevented by the locking / unlocking plate 63, so that the lock cannot be released by the outer handle 50b.

[0012]

By the way, in the above-mentioned conventional configuration, the door closing lock 5 mounted above the center line of the center pillar 51 in the vertical direction.
Reference numeral 8 denotes a structure in which the second rod 56 is directly connected to an inner lever 53a disposed substantially at the center of the center pillar 51. In this case, the second rod 56
Is placed in a state where the inside of the center pillar 51 is obliquely greatly inclined. In order to secure this installation space inside the center pillar 51, it is necessary to increase the vertical width of the center pillar 51. I have. As a result, the sizes of the transparent windows above and below the center pillar 51 are reduced, and there is a problem that the visibility cannot be sufficiently secured.

The remote control 54 described above
The sixth rod 65 for connecting the key cylinder 64 and the locking / unlocking plate 63 mounted in the vicinity of the center pillar 51 has a configuration in which the sixth rod 65 is disposed in the vertical direction. It becomes large and visibility is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to improve the visibility of a door and further improve the operability at the time of unlocking of a construction machine cab. Is to provide.

[0015]

Therefore, the cab of the construction machine according to the present invention is provided with a door for opening and closing a side opening, and an opening / closing handle 2 is provided at one end of the door in the front-rear direction. On the end side, a door closing lock 4 for locking the door in the closed position and a door opening lock 5 for locking the door in the open position are provided. By operating the open / close handle 2, the locks 4 and 5 are unlocked. The lock release mechanism to be generated is provided by a center pillar 1 along a substantially middle height position of the door.
c, a relay link 18 that rotates with the operation of the opening / closing handle 2 is provided in the cab of the construction machine provided through
The door closing lock 4 and the door opening lock 5 are connected to the connecting members 21 so that the door closing lock 4 and the door opening lock 5 are respectively unlocked with the rotation of the relay link 18. The relay link 1 via 22
8 and the relay link 18 is arranged in an end region of each of the locks 4 and 5 in the center pillar 1c.

According to such a configuration, the relay link 18
Are arranged in the end regions of the center pillar 1c on the side of the locks 4 and 5, and the relay link 18 is provided with the door closing lock 4
Since the door lock 5 and the door opening lock 5 are connected by the connecting members 21 and 22, respectively, it is possible to minimize an arrangement space in the center pillar 1c required for these connecting members. As a result, the width of the center pillar 1c in the vertical direction can be reduced, and the size of the transparent window above and below the center pillar 1c can be increased, so that the visibility is improved.

According to a second aspect of the present invention, the operator's cab of the construction machine is formed such that at least one of the door closing lock 4 and the door opening lock 5 is unlocked by a substantially vertical operation. At the same time, the position of the relay link 18 is determined such that the connecting member 21 for connecting the lock 4 and the relay link 18 to each other is arranged substantially along the operation direction of unlocking the lock 4. The relay link 18 is provided.

In this configuration, the connecting member 21 for connecting the lock 4 to the relay link 18 is disposed substantially along the vertical direction with respect to the lock 4 which is unlocked by the operation along the vertical direction. Lock 4 via member 21
The force generated when the lock is released is transmitted to the lock 4 with the dispersion of unnecessary force such as torsion suppressed as much as possible. Therefore, the lock release operation can be caused by a smaller operation force, so that the operability is improved.

The cab of the construction machine according to the third aspect includes an inner intermediate transmission member 6 connected to the inner opening / closing handle 2 so as to interlock with an unlocking operation of the inner opening / closing handle 2 operated from the inside of the door; An outer intermediate transmission member 7 connected to the outer opening / closing handle 3 is provided in the center pillar 1c so as to interlock with the outer opening / closing handle 3 operated from the outside, and the inner intermediate transmission member 6 is connected to the intermediate link 18. In addition, interlocking means for interlocking the inner intermediate transmission member 6 with the operation of the outer intermediate transmission member 7 in the unlocking direction is provided.

In this case, since the inner intermediate transmission member 6 is interlocked with the operation of the outer intermediate transmission member 7 in the unlocking direction, a connecting member for connecting the outer intermediate transmission member 7 to the intermediate link 18 becomes unnecessary, and the inside of the center pillar 1c is eliminated. The overall length of the connecting member provided through the through hole can be made shorter. Further, by separately providing a locking means for locking the operation in the unlocking direction to the outer intermediate transmission member 7 by, for example, a key operation, the unlocking by the inner opening / closing handle 2 is possible. It is also easy to adopt a configuration in which the lock cannot be released with the outer opening / closing handle 3 while keeping the state.

According to a fourth aspect of the present invention, the cab of the construction machine is movable between a locked position for preventing the operation of the outer intermediate transmission member 7 in the unlocking direction and an unlocked position for permitting the operation in the unlocking direction. In addition to the provision of the stop member 8, a key cylinder 15 for causing the locking member 8 to move between the above-mentioned positions is provided in an end region of the center pillar 1c.

That is, when the locking member 8 operated by the key operation as described above is provided so that the lock with the outer opening / closing handle 3 cannot be released, the key cylinder 15 is connected to the center pillar 1c. By providing the key cylinder 15 and the locking member 8 with each other by providing them in the end region, it is possible to arrange a connecting member necessary for connecting the key cylinder 15 and the locking member 8 to each other substantially horizontally in the center pillar 1c. Therefore, the space in the vertical direction of the connecting member in the center pillar 1c can be reduced as much as possible, thereby also improving the visibility.

[0023]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the structure of a lock release mechanism provided at a substantially intermediate height of the sliding door according to the present embodiment. The door is slidable between a closed position that closes a side opening through which an operator enters and exits, and an open position that opens this opening, for example, on the side of a cab of a construction machine such as the hydraulic excavator described above. Is provided.

This door is provided with a center pillar 1c which extends substantially horizontally in the front-rear direction at a height approximately midway between the front pillar 1a on the front edge side and the rear pillar 1b on the rear edge side constituting the door frame. The front pillar 1a has an opening / closing handle 2 that is gripped when opening and closing the door on the inner and outer surfaces of a region where the front end of the center pillar 1c continues.
・ 3 are mounted respectively. Meanwhile, rear pillar 1
b, a door closing lock 4 for locking the door in the closed position is attached near the height region of the upper edge of the center pillar 1c, and a height slightly lower than the lower edge of the center pillar 1c. A door opening lock 5 for locking the door in the fully open position is mounted in the area.

The opening / closing handles 2, 3 are respectively mounted so as to be rotatable about vertical pivots S ₂ , S ₃ respectively.
Rod connecting protruding pieces 2a, 3a protruding into the front pillar 1a are formed on opposing inner surfaces of the handles 2, 3, respectively. In the following description, the inner opening / closing handle operated from the inside of the door on the back side of the paper surface will be referred to as the inner handle 2, and the outer opening / closing handle on the near side of the paper operated from the outside of the door will be referred to as the outer handle 3.

In the center pillar 1c, an inner lever (inner intermediate transmission member) 6, an outer lever (outer intermediate transmission member) 7, and a locking / unlocking plate (locking member) 8 are provided substantially at the center in the front-rear direction. And a remote control 9 in which are sequentially stacked from the back side of the paper. The inner lever 6 and the outer lever 7 have their upper ends mounted on a bracket 11 so as to be rotatable around the pivot 10 by a pivot 10. The inner lever 6 is formed so as to protrude downward from the outer lever 7. The lower front end of the inner lever 6 and the rod connecting projection 2 a of the inner handle 2 are connected to a center pillar. The first rods 12 are connected to each other by a first rod 12 extending substantially horizontally in the inside 1c. The lower end of the outer lever 7 and the rod connecting projection 3a of the outer handle 3
They are connected to each other by a second rod 13 extending substantially horizontally at a position slightly higher than the rod 12.

Although not shown, the rear edge of the outer lever 7 has a bent portion extending toward the back of the drawing.
The inner lever 6 is formed as interlocking means for interlocking with the outer lever 7. That is, when the outer lever 7 rotates clockwise around the pivot 10 in the figure, the bent portion comes into contact with the rear edge of the inner lever 6 from behind and pushes the inner lever 6. As a result, the inner lever 6 is also configured to rotate integrally with the outer lever 7.

On the other hand, a long hole 6a is formed in the lower front end side of the inner lever 6, and the first rod 12 is inserted in the state where the rear end of the first rod 12 is fitted in the long hole 6a.
Are connected to the inner lever 6. As a result, when the inner lever 6 is rotated clockwise by being pushed by the outer lever 7 as described above, the rear end of the first rod 12 is moved rearward in the elongated hole 6a. As a result, the first rod 12 and the inner handle 2 connected to the first rod 12 are held stationary.

The locking / unlocking plate 8 is slightly behind the outer lever 7 and is
Is attached to the bracket 11 so as to be rotatable around the bracket 11. On the other hand, a key cylinder 15 is attached to the front end side of the center pillar 1c, and the key cylinder 15 is attached to the locking / unlocking plate 8 via a third rod 16 extending substantially horizontally above the second rod 13. The upper end is connected.

A lever locking hole 8a is formed in the locking / unlocking plate 8 in a region overlapping with the outer lever 7, and a locking pin 7a fitted into the lever locking hole 8a is provided upright on the outer lever 7. ing. When the locking / unlocking plate 8 is at the illustrated pivot position, that is, at the unlocking position,
The above-mentioned lever locking hole 8a is formed in such a shape as to include the movement locus of the locking pin 7a when the above-mentioned clockwise rotation of the outer side lever 7 occurs. Then, the key inserted into the key cylinder 15 is rotated to move the locking / unlocking plate 8 from the unlocking position shown to a locking position rotated counterclockwise around the pivot 14 via the third rod 16. As a result, the locking pin 7a is connected to the lever locking hole 8a.
, So that a state in which the above-described clockwise rotation of the outer lever 7 is prevented can be obtained.

At the lower rear end of the inner lever 6,
A fourth rod 17 extending substantially horizontally rearward in the center pillar 1c is connected. A relay link 18 having a substantially fan shape is disposed on the rear end side of the center pillar 1c. The relay link 18 is attached to a bracket 20 at its upper end side by a pivot 19 so as to be rotatable around the axis 19. Axis 19 in this relay link 18
The fourth rod 17 is provided in an end region on the lower front side of the fourth rod 17.
Are connected at the rear end.

On the other hand, the door closing lock 4 and the door opening lock 5 are respectively mounted in the lock casings 4a and 5a so as to be rotatable in a vertical plane. By lowering the end side, the tip side rises and moves from the locked position to the unlocked position. Conversely, the door opening lock 5 moves from the locked position to the unlocked position by raising the rear end side and thereby lowering the front end side.

A fifth end is provided at the rear end of the door closing lock 4.
The rod 21 is connected, and a sixth rod 22 is connected to the rear end of the door opening lock 5. Fifth rod 21
As shown in FIG. 2 as well, it is suspended substantially vertically, and its lower end is connected to a portion of the relay link 18 that is obliquely lower and lower than the pivot 19. The upper end of the sixth rod 22 is connected to a point on the vertical line passing through the pivot 19 below the pivot 19 in the relay link 18, and extends rearward and obliquely downward from the connection to the lower end of the sixth rod 22. It is connected to the opening lock 5.

Next, the operation of the above-structured lock release mechanism will be described.

First, in the state shown in FIG. 1, the door closing lock 4 and the door opening lock 5 are respectively located at the locking positions. At this time, when the door is at the closing position, the door closing lock 4 is locked. 4 is engaged with a door closing striker (not shown).

[0037] In this state, for example, the inner handle 2 as shown in the drawing the solid arrow, performs an operation of rotating around the pivot S _2, the first rod 12 is pulled forward, along with this , The inner lever 6 rotates clockwise about the pivot 10. At this time, the inner lever 6 rotates independently of the outer lever 7, so that the outer lever 7 and the outer handle 3 are held stationary.

As described above, when the inner lever 6 rotates clockwise, the fourth rod 17 is pulled forward, whereby the relay link 18 rotates clockwise about the pivot 19. To rotate. As a result, as shown by the two-dot chain line in FIG. 2, the connection point of the fifth rod 21 to the relay link 18 moves diagonally downward and left in the figure. Accordingly, the fifth rod 21 is pulled downward, and as a result, the rear end of the door closing lock 4 is lowered, and the lock by the door closing lock 4 is released.

At the same time, the sixth rod 2
The connection point 2 moves obliquely upward and leftward in the figure on the circumference around the pivot 19. Accordingly, the sixth rod 22 is pulled upward, and as a result, the door opening lock 5 is also
The lock position is moved from the lock position to the unlock position.

Thus, for example, when the door is at the closed position, the locked state by the door closing lock 4 is released, and then the door is slid rearward to open the side opening of the cab. When the door is locked by the door opening lock 5 in a state where the door is fully opened, the lock on the door opening lock 5 is released by rotating the inner handle 2 in the same manner as described above. Thereafter, the door is slid forward and moved to a closed position to close the side opening of the cab.

On the other hand, the outer handle 3, as shown in FIG. 1 the solid arrow, performs an operation of rotating around the pivot S _3, at this time, the second rod 13 is pulled forward,
Accordingly, the outer lever 7 rotates clockwise around the pivot 10. The bent portion formed at the rear edge of the outer lever 7 allows the inner lever 6
Is pushed, and the inner lever 6 rotates integrally with the outer lever 7.

As a result, in the same manner as described above, the relay link 18 rotates clockwise through the fourth rod 17 and the door closing lock 4 and the fifth rod 21 and the sixth rod 22 respectively. The door opening lock 5 is moved to the unlock position. At this time, the rear end of the first rod 12 extending from the inner handle 2 relatively slides in the elongated hole 6a of the inner lever 6 as described above, so that the first rod 12 and the inner handle 2 It is kept stationary.

When the key is inserted into the key cylinder 15 and the locking / unlocking plate 8 is positioned at the locking position, the locking pin 7a of the outer lever 7 comes into contact with the inner peripheral edge of the lever locking hole 8a. The outer lever 7
Is restricted. As a result, the outer handle 3
In this case, the lock cannot be released, and unnecessary door opening and closing by a third party other than the operator is prevented.

As described above, in the present embodiment, the relay link 18 is disposed on the rear end side of the center pillar 1c, and the relay link 18 has the door closing lock 4 and the door opening lock 5, respectively. Fifth rod 21 and sixth connected
Since both of the rods 22 are connected to each other, the space required in the center pillar 1c for the fifth rod 21 and the sixth rod 22 can be minimized. As a result, the width of the center pillar 1c in the vertical direction can be reduced, and the sizes of the transparent windows above and below the center pillar 1c can be increased, so that the visibility is improved.

Further, in the above, the fourth rod 17 and the fifth rod 21 / sixth rod 22 are connected to the sequentially specified portions around the rotation center of the relay link 18, whereby
The forward moving operation of the fourth rod 17 is converted into a descending operation to the fifth rod 21 and is transmitted to the sixth rod 22 as an ascending operation. As described above, only by providing one member of the relay link 18, the fifth rod 21 and the sixth rod 21 are connected.
Since the above-described operation can be caused to occur with the rod 22,
The overall configuration is simpler and more compact.

Further, in the above embodiment, in particular,
The fifth rod 21 between the door closing lock 4 and the relay link 18 determines the position of the relay link 18 so that a positional relationship substantially orthogonal to the extension of the fourth rod 17 is obtained. Are located. That is, the fifth rod 21 is arranged along the operation direction of unlocking the lock 4 for closing the door. Therefore, this fifth
The force for causing the door closing lock 4 to perform the unlocking operation via the rod 21 is transmitted to the door closing lock 4 with the dispersion to unnecessary forces such as torsion suppressed as much as possible. Therefore, the unlock operation can be performed with a smaller operation force, and good operability can be obtained.

In the above description, the center pillar 1c has:
A remote control 9 having an inner lever 6 connected to the inner handle 2 and an outer lever 7 connected to the outer handle 3 is provided. When an unlocking operation is performed by the outer handle 3, the outer lever 7 is turned off. Are configured to engage with the inner levers 6 and integrally operate in the unlocking direction. Therefore, if the inner lever 6 is connected to the relay link 18,
It is not necessary to connect the outer side lever 7 to the relay link 18. Therefore, the overall rod length can be made shorter.

Further, by providing an unlocking plate 8 for locking the outer lever 7 by key operation,
It is also easy to adopt a configuration for preventing unnecessary opening and closing of the door by a third party. In this case, in the above case, the key cylinder 15 is provided on the front end side of the center pillar 1c, and the key cylinder 15 and the locking / unlocking plate 8 are connected to each other by the third rod 16 extending substantially horizontally in the center pillar 1c. It has a configuration. Therefore, as compared with the conventional configuration shown in FIG. 7 in which the key cylinder and the locking / unlocking plate are connected to each other by the rods arranged vertically in the center pillar, The dimension in the direction can be reduced, which also improves the visibility.

Although the specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be variously modified within the scope of the present invention. For example, in the above description, the connection point of the sixth rod 22 to the relay link 18 is set on a vertical line passing through the pivot 19, but, for example, when the up-down stroke of the sixth rod 22 is made larger. As shown in FIG. 3, a sixth rod 22 is connected forward and a fifth rod 21 is connected rearward with a pivot 19 serving as the center of rotation of the relay link 18 interposed therebetween. It is possible to adopt a configuration in which the fourth rod 17 is connected to a vertical line passing through the pivot 19 at the lower end side of 18.

In the above description, the components 6 of the inner handle 2, the outer handle 3, and the remote control 9.
As an example, rods were used as connecting members for connecting the 7.8, the relay link 18, the door closing lock 4, and the door opening lock 5 to each other, but wires were used instead of these rods. A configuration is also possible.

In the above description, the locking / unlocking plate 8 activated to the locking position by the key operation is engaged with the outer lever 7 to prevent the unlocking by the outer handle 3. The lock plate 8 may be configured to be engaged with the inner lever 6, thereby preventing the outer lever 7 from being unlocked.

Further, in the above description, a sliding door has been described as an example, but four-bar links are provided at the upper side and the lower side of the door, and the four-bar links move between the closed position and the open position. The present invention can be applied to a link-type door configured as described above.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a lock release mechanism according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of a rear end side of a door in the lock release mechanism.

FIG. 3 is a main part front view showing a relay link and a connecting state of a rod to the relay link in another embodiment of the present invention.

FIG. 4 is a front view showing the overall configuration of a hydraulic power shovel as a working machine.

FIG. 5 is a front view of a door attached to the hydraulic power shovel.

FIG. 6 is a perspective view of a cab of the hydraulic power shovel.

FIG. 7 is a configuration diagram of a conventional lock release mechanism.

[Explanation of symbols]

 1c Center pillar 2 Inner handle (inner open / close handle) 3 Outer handle (outer open / close handle) 4 Door closing lock 5 Door opening lock 6 Inner side lever (inner intermediate transmission member) 7 Outer side lever (outer intermediate transmission member) 8 Locking / unlocking plate (locking member) 15 key cylinder 18 relay link 21 fifth rod (connecting member) 22 sixth rod (connecting member)

Claims (4)

[Claims] A door for opening and closing a side opening is provided, and an opening / closing handle (2) is provided at one end in the front-rear direction of the door, and a door closing lock ( 4) and a door opening lock (5) for locking the door at the open position, and an unlocking mechanism for causing each of the locks (4) and (5) to unlock by operating the opening / closing handle (2). In a cab of a construction machine provided through a center pillar (1c) along a substantially middle height position of a door, a relay link (18) that rotates in response to operation of an opening / closing handle (2) is provided. The door closing lock (4) and the door opening lock (5) so that the door closing lock (4) and the door opening lock (5) are unlocked with the turning operation of 18). And a connecting member (21), respectively. (22) is connected to the relay link (18), and the relay link (18) is arranged in an end region on the lock (4) (5) side of the center pillar (1c). Driver's cab for construction machinery. 2. A door closing lock (4) and / or a door opening lock (5), wherein at least one of the locks (4) is formed so as to be unlocked by an operation substantially along a vertical direction. Lock (4) and the relay link (18)
The position of the relay link (18) is determined so that the connecting member (21) for connecting the relay link (18) and the lock member (4) is arranged substantially along the operation direction of unlocking of the lock (4). 2. The operator cab of a construction machine according to claim 1, wherein: 3. An inner intermediate transmission member (6) connected to the inner opening / closing handle (2) so as to interlock with an unlocking operation of the inner opening / closing handle (2) operated from the inside of the door.
And an outside opening / closing handle operated from outside the door (3)
An outer intermediate transmission member (7) connected to an outer opening / closing handle (3) is provided in the center pillar (1c) so as to interlock with the inner link (1), and the inner intermediate transmission member (6) is connected to the intermediate link (1).
The construction machine according to claim 1 or 2, further comprising an interlocking means for connecting the inner intermediate transmission member (6) to the operation of the outer intermediate transmission member (7) in the unlocking direction while being connected to the inner transmission member (8). Driver's cab. 4. A locking member (8) movable between a locking position for preventing the operation of the outer intermediate transmission member (7) in the unlocking direction and an unlocking position for permitting the operation in the unlocking direction. In addition, a key cylinder (1) for causing the locking member (8) to move between the above-described positions.
5. The cab of a construction machine according to claim 3, wherein 5) is provided in an end region of the center pillar (1c).