JP7095973B2 - Construction machinery - Google Patents

Description

The present invention relates to construction machinery.

Construction machinery with a driver's cab, such as a mobile crane, is known. A construction machine provided with such a driver's cab is disclosed in, for example, Patent Document 1.

For construction machinery with a cab, the work is basically done with the cab door closed, but in some cases the door is left open, usually with the door fully open. I have something to do. This is the case when heavy work is done, when you want to see the part that is difficult to see when the door is closed, or when you want to hear the voices and sounds of the surroundings.

Jitsukaisho 61-178776

As mentioned above, assuming that the door is left open, the cab door of the construction machine needs to be locked not only in the closed state but also in the open state. be.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a construction machine having a cab with a sliding door that can be locked in a fully open position.

The present invention is a construction machine provided with a driver's cab, wherein the driver's cab has a driver's cab main body having an entrance / exit, a slide door that opens / closes the entrance / exit by sliding with respect to the driver's cab main body, and the like. A lock mechanism for locking the slide door at the fully open position of the slide door is provided. The lock mechanism includes a manual lock mechanism that manually locks the slide door at the fully open position, and a temporary lock mechanism that temporarily locks the slide door at the fully open position. The manual locking mechanism has a lever that can be manually rotated. Whether the lever is in the locked position for maintaining the lock of the slide door or in the unlocked position for unlocking the slide door can be visually confirmed from the inside of the driver's cab.
In one aspect, in addition to the above configuration, the manual locking mechanism is configured to move the lever from the locked position to the unlocked position when the sliding door reaches the fully open position. ..
In another aspect, in addition to the above configuration, the driver's cab body includes a guide rail that guides the slide door, and the guide rail is provided so as to face the slide door. The manual lock mechanism includes the lever provided on the slide door and a lock receiving portion provided on the guide rail, and the temporary lock mechanism is a temporary lock leaf spring fixed to the guide rail. And a guide roller provided on the slide door, and the lock mechanism is housed within the height of the guide rail.

INDUSTRIAL APPLICABILITY According to the present invention, there is provided a construction machine having a cab with a door that can be locked in a fully open position.

FIG. 1 shows a mobile crane according to an embodiment. FIG. 2 is a perspective view of the driver's cab shown in FIG. FIG. 3 is a perspective view of the lower slider and its peripheral portion as viewed from the outside of the driver's cab. FIG. 4 is a perspective view of the lower slider and its peripheral portion as viewed from the inside of the driver's cab. FIG. 5 is a plan view of the manual locking mechanism seen from above. FIG. 6 is a plan view of the manual locking mechanism seen from the front. FIG. 7 is a plan view of the manual locking mechanism seen from the left. FIG. 8 is a plan view of the manual locking mechanism seen from below. FIG. 9 shows the positional relationship between the claw and the striker with respect to the position of the lever. FIG. 10 is a top view of the lower slider and its peripheral portion when the lever is in the unlocked position. FIG. 11 is a top view of the lower slider and its peripheral portion when the lever is in the locked position. FIG. 12 shows how the lock is maintained when the lever is in the lock position. FIG. 13 shows how the lever in the locked position is moved to the unlocked position when the sliding door is moved to the fully open position. FIG. 14 shows how the sliding door is moved forward after the lever in the locked position is moved to the unlocked position by manual operation. FIG. 15 shows how the lever in the unlocked position is manually moved to the locked position after the sliding door is moved to the fully open position.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a mobile crane 10 which is one of the construction machines according to the present embodiment. As shown in FIG. 1, the crane vehicle 10 includes a traveling body 20 capable of traveling and a crane 40 installed on the traveling body 20.

The traveling body 20 includes a mounting table 24 on which the crane 40 is mounted, and a driver's cab 26 for controlling the traveling of the traveling body 20. The mounting base 24 is supported by a plurality of wheels 22. The wheels 22 are configured to be driveable by a drive mechanism (not shown), and some wheels 22 are configured to be steerable by a steering mechanism (not shown). The driver's cab 26 is provided with a plurality of operating devices such as an accelerator, a brake, and a steering wheel, and is configured to be able to drive and steer the wheels 22 by operating these operating devices. Further, the mounting table 24 is provided with an outrigger 28 for stably supporting the mounting table 24 with respect to the ground when the crane 40 is working.

The crane 40 includes a swivel body 42 rotatably mounted on a mounting table 24, a boom 46 for lifting a load, and an undulating cylinder 48 for undulating the boom 46. The boom 46 and the undulating cylinder 48 are mounted on the swivel body 42. A driver's cab 44 is mounted on the swivel body 42. The driver's cab 44 is provided with a plurality of operating levers and the like, and these operating levers and the like are configured to be able to control the turning of the swivel body 42, the undulation of the boom 46, and other operations such as lifting of a load. Has been done.

The boom 46 is expandable and contractible, and a counterweight 50 is attached to the rear portion of the swivel body 42 in order to suppress an imbalance in weight during cargo handling work.

FIG. 2 is a perspective view of the driver's cab 44 shown in FIG. As shown in FIG. 2, the driver's cab 44 includes a driver's cab body 60 having an entrance / exit 60a, and a slide door 70 that opens / closes the entrance / exit 60a by sliding with respect to the driver's cab body 60. ..

The driver's cab main body 60 has an entrance / exit 60a on the left side for an operator to get on / off. In this specification, front and back, left and right, and top and bottom are defined as follows. Regarding the front and rear, the side where the operation lever or the like is located with respect to the worker when the worker is seated in the driver's seat (not shown) in the driver's cab main body 60 is the front, and the opposite side is the back. The left and right are based on the posture in which the worker faces forward and normally sits in the driver's seat. In addition, the top and bottom are based on the posture in which the worker normally sits in the driver's seat.

The driver's cab main body 60 has an upper guide rail 62 and a lower guide rail 64 provided above and below the entrance 60a, respectively. Both the upper guide rail 62 and the lower guide rail 64 are provided so as to face the slide door 70.

The sliding door 70 has an upper slider 80 that can be moved back and forth guided by the upper guide rail 62, and a lower slider 90 that can be moved back and forth guided by the lower guide rail 64.

The upper guide rail 62 and the lower guide rail 64 provided in the cab main body 60 guide the upper slider 80 and the lower slider 90, and thus the slide door 70. As a result, the slide door 70 is held by the driver's cab body 60 so that it can slide back and forth with respect to the driver's cab body 60.

In the present specification and the like, the position where the slide door 70 is located at the frontmost position and the entrance / exit 60a is completely closed is referred to as a closed position, and the position where the slide door 70 is located at the rearmost position and the entrance / exit 60a is opened most widely. It is called the fully open position.

The cab 44 also includes a locking mechanism 110 that locks the slide door 70 in the fully open position of the slide door 70. The lock mechanism 110 is distributed and provided on the lower guide rail 64 and the lower slider 90. That is, some components of the locking mechanism 110 are provided on the lower guide rail 64, and other components of the locking mechanism 110 are provided on the lower slider 90. Further, the lock mechanism 110 is housed within the height of the lower guide rail 64. That is, the lock mechanism 110 is arranged within the range in which the lower guide rail 64 is formed in the vertical direction.

3 and 4 show the lower slider 90 and its peripherals in the fully open position of the slide door 70. FIG. 3 is a perspective view seen from the outside of the driver's cab 44, and FIG. 4 is a perspective view seen from the inside of the driver's cab 44. In FIG. 3, in order to visualize those structures, the illustration of the floor of the driver's cab main body 60 and a part of the lower guide rail 64 is omitted.

The lower slider 90 has a door mounting portion 92 attached to the door stay 72 of the slide door 70, a vertical guide roller 94 that can rotate around an axis extending left and right, and a left and right guide roller 96 that can rotate around an axis extending vertically. is doing. The upper and lower guide rollers 94 roll on the rail bottom wall 64b of the lower guide rail 64 as the lower slider 90 moves. The left and right guide rollers 96 define the left and right positions of the lower slider 90 by abutting a part of the lower guide rail 64 (not shown in FIG. 3).

At the rear end of the lower guide rail 64, a stopper bracket 100 that defines the fully open position of the slide door 70 is provided. The stopper bracket 100 is provided with a stopper 102 that comes into contact with the lower slider 90. The stopper 102 is made of an elastic member in order to soften the impact at the time of contact with the lower slider 90. When the lower slider 90 of the slide door 70 comes into contact with the stopper 102, the movement of the slide door 70 to the rear is stopped, and the slide door 70 is arranged in the fully open position.

In order to automatically temporarily lock the slide door 70 arranged at the fully opened position, the temporary lock leaf spring 122 is fixed to the rail side wall 64a of the lower guide rail 64. The temporary lock leaf spring 122 is cantilevered and fixed to the rail side wall 64a of the lower guide rail 64 in front of the fully open position of the slide door 70, and protrudes to the left slightly forward of the fully open position of the slide door 70. It has a protruding portion 122a and a recess 122b recessed to the right at the fully opened position of the slide door 70.

The left and right positions of the left and right guide rollers 96 are regulated by the lower guide rail 64. Therefore, when the slide door 70 is moved backward toward the fully open position, the left and right guide rollers 96 hit the protrusion 122a of the temporary locking leaf spring 122 immediately before the fully open position, and the left and right guide rollers 96 move somewhat. Be hindered. The temporary locking leaf spring 122 hinders the movement of the left and right guide rollers 96 due to a weak force, but does not hinder the movement of the left and right guide rollers 96 due to a strong force.

When the slide door 70 is moved backward with a strong force, the left and right guide rollers 96 deform the temporary lock leaf spring 122 against the restoring force of the temporary lock leaf spring 122, and the temporary lock leaf spring 122 is deformed. It gets over the protruding portion 122a of the 122 and reaches the recess 122b of the leaf spring 122 for temporary locking, and the slide door 70 reaches the fully opened position. As the left and right guide rollers 96 get over the protruding portion 122a of the temporary locking leaf spring 122, the temporary locking leaf spring 122 returns to its original shape due to the restoring force.

As described above, the temporary locking leaf spring 122 hinders the movement of the left and right guide rollers 96 by a weak force, but does not hinder the movement of the left and right guide rollers 96 by a strong force. Therefore, the forward movement of the slide door 70 due to a weak force is hindered by the temporary locking leaf spring 122. However, the forward movement of the slide door 70 by a strong force is not hindered by the temporary locking leaf spring 122. As a result, the sliding door 70 is appropriately locked. In the present specification, such a lock is referred to as a temporary lock.

That is, the temporary lock leaf spring 122 fixed to the lower guide rail 64 and the left and right guide rollers 96 provided on the lower slider 90 cooperate to automatically temporarily lock the slide door 70 at the fully open position. It constitutes a temporary lock mechanism 120. The automatic temporary locking mechanism 120 may be regarded as a part of the locking mechanism 110. In other words, the lock mechanism 110 includes an automatic temporary lock mechanism 120.

The locking mechanism 110 also includes a manual locking mechanism 130 that manually locks the sliding door 70 in the fully open position. Unlike the automatic temporary lock mechanism 120, the manual lock mechanism 130 has a function of maintaining the lock of the slide door 70 unless the lock is released by a manual operation.

5 to 8 show the manual locking mechanism 130. FIG. 5 is a plan view of the manual locking mechanism 130 as viewed from above. FIG. 6 is a plan view of the manual locking mechanism 130 as viewed from the front. FIG. 7 is a plan view of the manual locking mechanism 130 as viewed from the left. FIG. 8 is a plan view of the manual locking mechanism 130 as viewed from below.

The manual lock mechanism 130 includes a lever 132 provided on the lower slider 90 and a lock receiving portion 170 provided on the lower guide rail 64. The lock receiving portion 170 is attached to a stopper bracket 100 provided at the rear end portion of the lower guide rail 64.

The manual lock mechanism 130 is configured to lock by engaging the lever 132 and the lock receiving portion 170, and to release the lock by disengaging the lever 132 and the lock receiving portion 170.

The lever 132 is attached to the lower slider 90 via the holding pin 152, and is rotatably held by the lower slider 90 about the holding pin 152. The lever 132 has a grip portion 134 that is gripped by the operator in order to facilitate the rotation operation of the lever 132 by the operator. The grip portion 134 extends upward. The lever 132 is located below the lower slider 90, except for the grip portion 134.

In order to regulate the rotation angle of the lever 132, the lever 132 has an arc slit 136 extending along an arc centered on the holding pin 152, and the lower slider 90 regulates the angle extending through the arc slit 136. It has a pin 154. The rotation angle of the lever 132 is regulated by the end of the arc slit 136 abutting on the angle regulating pin 154. In other words, the arc slit 136 of the lever 132 and the angle regulation pin 154 of the lower slider 90 cooperate to form a rotation angle regulation mechanism that regulates the rotation angle of the lever 132.

A spring 156 is provided between the lever 132 and the lower slider 90. One end of the spring 156 is supported by the lower slider 90 and the other end of the spring 156 is supported by the lever 132. More specifically, one end of the spring 156 is inserted into a hole formed in the lower slider 90 and the other end of the spring 156 is inserted into a hole formed in the lever 132. ing.

Due to the elastic force of the spring 156, the lever 132 is stably held at the position where one end of the arc slit 136 abuts on the angle regulating pin 154 or the position where the other end of the arc slit 136 abuts on the angle regulating pin 154. Will be done.

In the present specification, the position where the end of the arc slit 136 closer to the spring 156 abuts on the angle regulating pin 154 is referred to as a lock position, and the end of the arc slit 136 farther from the spring 156 becomes the angle regulating pin 154. The contacted position is called the non-locked position.

The lever 132 has a claw 138 and the lock receiving portion 170 has a striker 172 so that the lever 132 and the lock receiving portion 170 engage with each other to perform the locking function.

The lock receiving portion 170 is located below the lever 132, except for the striker 172. The striker 172 extends upward to at least the same position on the lever 132. The striker 172 may extend beyond the lever 132 and project above the lever 132, but its upper end is located below the lower slider 90. The striker 172 is inclined with respect to the front-rear direction so that the right end is located in the front and the left end is located in the rear.

The claw 138 has a shape that protrudes forward to the right when the lever 132 is in the locked position. The back surface of the claw 138 is inclined with respect to the front-rear direction so that the right side is located in the front and the left side is located in the rear. The inclination of the back surface of the claw 138 is larger than the inclination of the striker 172. Here, the magnitude of the inclination is discussed by the angle between the normal line standing on the surface of the member and the straight line extending back and forth.

FIG. 9 shows the positional relationship between the claw 138 and the striker 172 with respect to the position of the lever 132. In FIG. 9, the lever 132 in the spring reversal position is drawn by a solid line, and the lever 132A in the unlocked position and the lever 132B in the locked position are drawn by an imaginary line.

Here, the spring reversal position means a position in which the direction in which the spring 156 urges the lever 132 is reversed between the direction toward the unlocked position and the direction toward the locked position. When the lever 132 is in the spring reversal position, the spring 156 is most elastically deformed and the lever 132 is in a highly energetically unstable state. The lever 132 does not stay stably in the spring reversal position and is urged by the restoring force of the spring 156 in either the locked or unlocked position.

In both the locked position and the unlocked position, the end of the arc slit 136 of the lever 132 is in contact with the angle regulating pin 154, and the lever 132 is urged by the spring 156 so that the contact is maintained. .. Therefore, the lever 132 stably stays in the locked position or the unlocked position.

When the lever 132 is in the locked position, the claw 138 and the striker 172 are in substantially the same position in the left-right direction. That is, the claw 138 and the striker 172 are in a positional relationship in which they overlap each other when viewed from the front or the back. Therefore, with respect to the forward movement of the lower slider 90 in the fully opened position, the claw 138 of the lever 132 abuts on the striker 172 of the lock receiving portion 170, so that the forward movement of the lower slider 90 is hindered.

On the other hand, when the lever 132 is in the unlocked position, the claw 138 and the striker 172 are separated from each other in the left-right direction. That is, the claw 138 and the striker 172 are in a positional relationship in which they do not overlap each other when viewed from the front or the back. Therefore, the claw 138 of the lever 132 does not abut on the striker 172 of the lock receiving portion 170 with respect to the forward movement of the lower slider 90 in the fully opened position, so that the forward movement of the lower slider 90 is hindered. There is no such thing.

FIG. 10 is a top view of the lower slider 90 and its peripheral portion when the lever 132 is in the unlocked position. Further, FIG. 11 is a top view of the lower slider 90 and its peripheral portion when the lever 132 is in the locked position. Further, FIG. 4 is a perspective view of the lower slider 90 and its peripheral portion when the lever 132 viewed from the inside of the driver's cab 44 is in the unlocked position.

As can be seen from these figures, by visually observing the posture of the lever 132, particularly the position of the grip portion 134, whether the lever 132 is in the locked position or the unlocked position, that is, the manual locking mechanism 130 is in the locked state. It can be easily confirmed from the inside of the driver's cab 44 whether it is in the unlocked state.

Further, as can be seen particularly from FIG. 4, the lever 132 can be easily approached from the inside of the driver's cab 44, and the operator inside the driver's cab 44 holds the grip portion 134 of the lever 132 by hand and the lever 132. By rotating the lever, it is possible to easily switch between the locked state and the unlocked state of the manual lock mechanism 130.

Since the slide door 70 in the fully open position is temporarily locked in the fully open position by the automatic temporary lock mechanism 120, the slide door 70 suddenly moves forward when the manual lock mechanism 130 is manually operated, and the operator Is also effectively prevented from encountering danger.

FIG. 12 shows how the manual locking mechanism 130 keeps the sliding door 70 locked when the lever 132 is in the locked position. In FIG. 12, the slide door 70 is in the fully open position.

As shown in the upper part of FIG. 12, when the lever 132 is in the locked position, the claw 138 of the lever 132 and the striker 172 of the lock receiving portion 170 are in a positional relationship in which they overlap each other when viewed from the front or the back.

Therefore, as shown in the lower part of FIG. 12, when the lower slider 90 moves forward with the movement of the slide door 70 forward, the claw 138 of the lever 132 hits the striker 172 of the lock receiving portion 170. Contact. Therefore, the lower slider 90 is prevented from moving further forward.

FIG. 13 shows how the lever 132 in the locked position is moved to the unlocked position when the slide door 70 is moved to the fully open position. Initially, the lever 132 is in the locked position when the sliding door 70 is moved.

As shown in the upper part of FIG. 13, just before the slide door 70 reaches the fully opened position, the claw 138 of the lever 132 comes into contact with the striker 172 of the lock receiving portion 170.

Since the striker 172 is tilted in the front-rear direction and the back surface of the claw 138 is tilted in the front-rear direction more than the striker 172, as the slide door 70 moves further rearward, FIG. 13 shows. As shown in the middle row, the claw 138 gets over the striker 172. As a result, the lever 132 is rotated clockwise when viewed from above. When the claw 138 completely gets over the striker 172, the lever 132 has exceeded the spring reversal position. As a result, the lever 132 moves to the unlocked position, as shown in the lower part of FIG.

After that, as shown in the lower part of FIG. 13, the lower slider 90 comes into contact with the stopper 102 of the stopper bracket 100, the rearward movement of the slide door 70 is stopped, and the slide door 70 is arranged in the fully open position.

In this way, when the lever 132 in the locked position comes into contact with the striker 172, the lever 132 is rotated to soften the impact when the lever 132 and the striker 172 come into contact with each other. This preferably prevents the lever 132, the striker 172, the lower slider 90, the lower guide rail 64, and the like from being damaged or damaged.

FIG. 14 shows how the slide door 70 is moved forward after the lever 132 in the locked position is moved to the unlocked position by manual operation. Initially, the slide door 70 is in the fully open position and the lever 132 is in the locked position.

As shown in the upper part of FIG. 14, when the lever 132 is in the locked position, the claw 138 of the lever 132 and the striker 172 of the lock receiving portion 170 are in a positional relationship of overlapping each other when viewed from the front or the back. .. Therefore, the forward movement of the slide door 70 is restricted because the claw 138 of the lever 132 abuts on the striker 172 of the lock receiving portion 170 when the lower slider 90 moves forward.

As shown in the middle of FIG. 14, when the lever 132 is moved from the locked position to the unlocked position, the claw 138 of the lever 132 and the striker 172 of the lock receiving portion 170 overlap each other when viewed from the front or the back. There is no positional relationship.

Therefore, as shown in the lower part of FIG. 14, when the lower slider 90 moves forward with the movement of the slide door 70 forward, the claw 138 of the lever 132 hits the striker 172 of the lock receiving portion 170. The slide door 70 is moved forward without touching.

FIG. 15 shows how the lever in the unlocked position is manually moved to the locked position after the slide door 70 is moved to the fully open position.

As shown in the upper part of FIG. 15, when the lever 132 is in the unlocked position, the claw 138 of the lever 132 and the striker 172 of the lock receiving portion 170 are positioned so as not to overlap each other when viewed from the front or the back. be.

Therefore, as shown in the middle of FIG. 15, when the lower slider 90 moves backward with the movement of the slide door 70 backward, the claw 138 of the lever 132 hits the striker 172 of the lock receiving portion 170. It passes through the striker 172 without touching it.

After that, as shown in the lower part of FIG. 15, the lower slider 90 comes into contact with the stopper 102 of the stopper bracket 100, the rearward movement of the slide door 70 is stopped, and the slide door 70 is arranged in the fully open position.

After that, when the lever 132 is moved from the unlocked position to the locked position, the claw 138 of the lever 132 and the striker 172 of the lock receiving portion 170 are in a positional relationship of overlapping each other when viewed from the front or the back. Therefore, the forward movement of the slide door 70 is restricted because the claw 138 of the lever 132 abuts on the striker 172 of the lock receiving portion 170 when the lower slider 90 moves forward.

As described above, according to the present embodiment, there is provided a construction machine, for example, a mobile crane 10 having a driver's cab 44 with a sliding door 70 that can be locked in a fully open position.

In the above-described embodiment, the driver's cab main body 60 has an entrance / exit 60a on the left side, but the mechanism related to the slide door 70 of the present embodiment has the same as that of the driver's cab body 60 having the entrance / exit 60a on the right side. However, it is also applicable. Further, in the above-described embodiment, the cab 44 of the crane 40 has been described as an example, but the mechanism related to the slide door 70 of the present embodiment can be applied to the cab of a construction machine other than the crane.

Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to these embodiments, and various modifications and changes are made without departing from the gist thereof. May be good. The various modifications and changes referred to herein also include implementations in which the above-described embodiments are appropriately combined.

10 ... Crane car, 20 ... Traveling body, 22 ... Wheels, 24 ... Mounting platform, 26 ... Driver's cab, 28 ... Out trigger, 40 ... Crane, 42 ... Swing body, 44 ... Driver's cab, 46 ... Boom, 48 ... Undulating cylinder , 50 ... counter weight, 60 ... cab body, 60a ... entrance / exit, 62 ... upper guide rail, 64 ... lower guide rail, 64a ... rail side wall, 64b ... rail bottom wall, 70 ... sliding door, 72 ... door stay, 80 ... upper slider, 90 ... lower slider, 92 ... door mounting part, 94 ... upper and lower guide rollers, 96 ... left and right guide rollers, 100 ... stopper bracket, 102 ... stopper, 110 ... lock mechanism, 120 ... automatic temporary lock mechanism, 122 ... Temporary locking leaf spring, 122a ... Protruding part, 122b ... Recessed part, 130 ... Manual locking mechanism, 132 ... Lever, 134 ... Grip part, 136 ... Arc slit, 138 ... Claw, 152 ... Holding pin, 154 ... Angle regulation pin 1,156 ... Spring, 170 ... Lock receiving part, 172 ... Striker.

Claims (4)

It is a construction machine equipped with a cab, and the cab is
The driver's cab body with an entrance and exit,
A slide door that opens and closes the entrance by sliding with respect to the driver's cab body,
A locking mechanism for locking the sliding door at the fully open position of the sliding door is provided.
The lock mechanism is composed of a manual lock mechanism that manually locks the slide door at the fully open position and a temporary lock mechanism that temporarily locks the slide door at the fully open position.
The manual locking mechanism has a lever that can be manually rotated, and whether the lever is in a locked position for maintaining the lock of the sliding door or in an unlocked position for unlocking the sliding door. , Can be visually confirmed from the inside of the driver's cab,
The manual locking mechanism is a construction machine configured to move the lever from the locked position to the unlocked position when the sliding door reaches the fully open position. The construction machine according to claim 1 , wherein the driver's cab main body includes a guide rail for guiding the slide door, and the guide rail is provided so as to face the slide door. It is a construction machine equipped with a cab, and the cab is
The driver's cab body with an entrance and exit,
A slide door that opens and closes the entrance by sliding with respect to the driver's cab body,
A locking mechanism for locking the sliding door at the fully open position of the sliding door is provided.
The lock mechanism is composed of a manual lock mechanism that manually locks the slide door at the fully open position and a temporary lock mechanism that temporarily locks the slide door at the fully open position.
The manual locking mechanism has a lever that can be manually rotated, and whether the lever is in a locked position for maintaining the lock of the sliding door or in an unlocked position for unlocking the sliding door. , Can be visually confirmed from the inside of the driver's cab,
The driver's cab main body is provided with a guide rail for guiding the slide door, and the guide rail is provided so as to face the slide door.
The manual lock mechanism includes the lever provided on the slide door and the lock receiving portion provided on the guide rail.
The temporary lock mechanism includes a temporary lock leaf spring fixed to the guide rail and a guide roller provided on the slide door.
The locking mechanism is a construction machine that fits within the height of the guide rail. The construction machine according to any one of claims 1 to 3 , further comprising a swivel body in which the driver's cab is mounted.

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