JP2019081654A - Construction machinery - Google Patents

Abstract

To provide a construction machinery having an operator cab with a door lockable in a full opened position.SOLUTION: A construction machinery comprises an operator cab. The operator cab comprises an operator cab body having an entrance, a slide door for opening and closing the entrance by slidably moving with respect to the operator cab body and a lock mechanism for locking the slide door in a full opened position of the slide door.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a construction machine.

  There is known a construction machine having a cab, such as a crane car. A construction machine provided with such a cab is disclosed, for example, in Patent Document 1.

  In construction machines equipped with a cab, work with the cab door closed is basic, but in some cases, with the door kept open, the work is usually done with the door fully opened. There is something to do. This is when heavy work is done, when you want to see a part that is difficult to see when the door is closed, or when you want to hear the voices and sounds around you.

Japanese Utility Model Publication No. 61-178776

  As mentioned above, when it is assumed that the door is left open, the construction machine's cab door needs to be locked not only in the closed state but also in the open state. is there.

  The present invention has been made in consideration of such circumstances, and an object thereof is to provide a construction machine having a cab with a lockable slide door in a fully open position.

  The present invention is a construction machine provided with a cab, the cab comprising: a cab body having an entrance and a slide door for slidingly moving relative to the cab body; The slide door is provided with a lock mechanism that locks the slide door in a fully open position of the slide door.

  According to the present invention, there is provided a construction machine having a cab with a lockable door in a fully open position.

FIG. 1 shows a crane vehicle according to an embodiment. FIG. 2 is a perspective view of the cab shown in FIG. FIG. 3 is a perspective view of the lower slider and its periphery viewed from the outside of the cab. FIG. 4 is a perspective view of the lower slider and its periphery viewed from the inside of the cab. FIG. 5 is a plan view of the manual lock mechanism as viewed from above. FIG. 6 is a plan view of the manual lock mechanism as viewed from the front. FIG. 7 is a plan view of the manual lock mechanism as viewed from the left. FIG. 8 is a plan view of the manual lock mechanism as viewed from below. FIG. 9 shows the positional relationship between the claws and the striker with respect to the position of the lever. FIG. 10 is a top view of the lower slider and its periphery when the lever is in the unlocked position. FIG. 11 is a top view of the lower slider and its periphery when the lever is in the locked position. FIG. 12 shows how the lock is maintained when the lever is in the locked position. FIG. 13 shows how the lever in the locked position is moved to the unlocked position when the slide door is moved to the fully open position. FIG. 14 shows that the slide 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 moved to the locked position by manual operation after the slide 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 crane 10 which is one of the construction machines according to the present embodiment. As shown in FIG. 1, the crane 10 includes a movable traveling body 20 and a crane 40 installed on the traveling body 20.

  The traveling body 20 includes a mounting base 24 on which the crane 40 is mounted, and a 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 drivable by a drive mechanism (not shown), and some of the 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, and is configured to be able to operate the driving and steering of the wheels 22 by the operation of these operating devices. Further, the mounting base 24 is provided with an outrigger 28 for stably supporting the mounting base 24 on the ground when the crane 40 is in operation.

  The crane 40 is provided with a revolving unit 42 pivotally mounted on a mounting base 24, a boom 46 for lifting a load, and a relief cylinder 48 for raising and lowering the boom 46. The boom 46 and the relief cylinder 48 are mounted on the rotating body 42. A driver's cab 44 is mounted on the revolving unit 42. The driver's cab 44 is provided with a plurality of operating levers and the like, and configured to be able to control the turning of the revolving unit 42, the ups and downs of the boom 46, and other operations such as the lifting operation of the load by these operating levers. It is done.

  The boom 46 is extendable, and a counterweight 50 is attached to the rear of the rotating body 42 in order to suppress weight imbalance during cargo handling work.

  FIG. 2 is a perspective view of the cab 44 shown in FIG. As shown in FIG. 2, the cab 44 includes a cab body 60 having an entrance 60 a and a slide door 70 which opens and closes the entrance 60 a by sliding relative to the cab body 60. .

  The cab body 60 has an entrance 60a on the left side for the operator to get on and off. In the present specification, front and rear, right and left and upper and lower are defined as follows. With regard to front and rear, when the operator is seated on the driver's seat (not shown) in the cab body 60, the side where the operation lever or the like is positioned with respect to the operator is the front, and the opposite is the rear. The left and right are based on the posture in which the operator faces forward and is normally seated in the driver's seat. In addition, the upper and lower sides are based on the posture in which the operator normally sits in the driver's seat.

  The cab body 60 has an upper guide rail 62 and a lower guide rail 64 provided on the upper and lower sides of the entrance 60 a. Both the upper guide rail 62 and the lower guide rail 64 are provided to face the slide door 70.

  The slide door 70 has an upper slider 80 movable back and forth guided by an upper guide rail 62 and a lower slider 90 movable back and forth guided by a lower guide rail 64.

  An upper guide rail 62 and a lower guide rail 64 provided in the cab body 60 guide the upper slider 80 and the lower slider 90 and, in turn, the slide door 70. Thus, the slide door 70 is held by the cab body 60 so as to be slidable forward and backward with respect to the cab body 60.

  In this specification and the like, the position at which the slide door 70 is located at the frontmost position and completely closes the entrance 60a is referred to as a closed position, and the position at which the slide door 70 is located at the rearmost and opens the entrance 60a the most. It is called a fully open position.

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

  FIGS. 3 and 4 show the lower slider 90 and its periphery in the fully open position of the slide door 70. FIG. 3 is a perspective view seen from the outside of the cab 44, and FIG. 4 is a perspective view seen from the inside of the cab 44. As shown in FIG. In FIG. 3, the floor of the cab body 60 and a part of the lower guide rail 64 are not shown in order to visualize these structures.

  The lower slider 90 has a door attachment portion 92 attached to the door stay 72 of the slide door 70, an upper and lower guide roller 94 rotatable about an axis extending leftward and rightward, and a left and right guide roller 96 rotatable about an axis extending vertically. doing. The upper and lower guide rollers 94 roll on the rail bottom wall 64 b of the lower guide rail 64 as the lower slider 90 moves. The left and right guide rollers 96 define left and right positions of the lower slider 90 by abutting on 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 for defining a fully open position of the slide door 70 is provided. The stopper bracket 100 is provided with a stopper 102 that abuts on the lower slider 90. The stopper 102 is made of an elastic member in order to reduce an impact at the time of contact with the lower slider 90. When the lower slider 90 of the slide door 70 abuts against the stopper 102, the rearward movement of the slide door 70 is stopped and the slide door 70 is disposed in the fully open position.

  In order to automatically temporarily lock the slide door 70 disposed at the fully open position, a temporary lock leaf spring 122 is fixed to the rail side wall 64 a of the lower guide rail 64. The temporary lock leaf spring 122 is cantilevered on the rail side wall 64 a of the lower guide rail 64 in front of the fully open position of the slide door 70, and protrudes leftward slightly forward of the fully open position of the slide door 70. And a recessed portion 122b recessed rightward at the fully open position of the slide door 70.

  The left and right guide rollers 96 are regulated by the lower guide rails 64 in the left and right position. For this reason, when the slide door 70 is moved rearward toward the fully open position, the right and left guide rollers 96 hit the projection 122a of the temporary lock leaf spring 122 just before the fully open position, and the movement of the left and right guide rollers 96 is somewhat It is disturbed. The temporary lock leaf spring 122 prevents the movement of the left and right guide rollers 96 due to a weak force, but does not prevent 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 plate spring 122 against the restoring force of the temporary lock plate spring 122, and the temporary lock plate spring After passing over the projecting portion 122a of 122, the recessed portion 122b of the temporary lock plate spring 122 is reached, and the slide door 70 reaches the fully open position. As the left and right guide rollers 96 move over the protruding portion 122a of the temporary lock plate spring 122, the temporary lock plate spring 122 returns to its original shape by a restoring force.

  As described above, the temporary lock leaf spring 122 prevents the movement of the left and right guide rollers 96 due to the weak force, but does not prevent the movement of the left and right guide rollers 96 due to the strong force. For this reason, the forward movement of the slide door 70 due to a weak force is blocked by the temporary lock plate spring 122. However, forward movement of the slide door 70 due to strong force is not blocked by the temporary lock leaf spring 122. As a result, the slide door 70 is properly locked. Such a lock is referred to herein 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 lock the slide door 70 automatically in the fully open position. The temporary lock mechanism 120 is configured. The automatic temporary locking mechanism 120 may be considered as part of the locking mechanism 110. In other words, the lock mechanism 110 includes the automatic temporary lock mechanism 120.

  The lock mechanism 110 also includes a manual lock mechanism 130 that manually locks the slide 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 an operation of releasing the lock is performed by a manual operation.

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

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

  The manual lock mechanism 130 is configured to lock by the engagement of the lever 132 and the lock receiver 170 and to release the lock by releasing the engagement of the lever 132 and the lock receiver 170.

  The lever 132 is attached to the lower slider 90 via a holding pin 152, and is rotatably held by the lower slider 90 about the holding pin 152. The lever 132 has a gripping portion 134 gripped by the operator in order to facilitate the turning 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 134.

  In order to regulate the pivoting 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 has an angle regulation extending through the arc slit 136. It has a pin 154. When the end of the circular arc slit 136 abuts on the angle regulating pin 154, the turning angle of the lever 132 is regulated. In other words, the arc slit 136 of the lever 132 and the angle regulating pin 154 of the lower slider 90 cooperate with each other to constitute a pivoting angle regulating mechanism that regulates the pivoting 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 the hole formed in the lower slider 90, and the other end of the spring 156 is inserted into the hole formed in the lever 132. ing.

  The elastic force of the spring 156 stably holds the lever 132 at a position where one end of the arc slit 136 abuts against the angle restricting pin 154 or a position where the other end of the arc slit 136 abuts against the angle restricting pin 154 Be done.

  In the present specification, a position where the end of the arc slit 136 closer to the spring 156 abuts against the angle restricting pin 154 is referred to as a locked position, and the end of the arc slit 136 far from the spring 156 is the angle restricting pin 154. The abutted position is referred to as a non-locking position.

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

  The lock receiver 170 is located below the lever 132 except for the striker 172. The striker 172 extends upward at least to the same position of the lever 132. The striker 172 may extend beyond the lever 132 and may 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 positioned forward and the left end is positioned rearward.

  The claw 138 has a shape projecting forward to the right when the lever 132 is in the lock position. The rear surface of the claw 138 is inclined with respect to the front-rear direction so that the right side is located forward and the left side is located backward. The slope of the back of the claw 138 is greater than the slope of the striker 172. Here, the size of the slope is discussed in terms of the angle between the normal to 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 reverse position is drawn as a solid line, and the lever 132A in the unlocked position and the lever 132B in the locked position are drawn as imaginary lines.

  Here, the spring reverse position means a position where the direction in which the spring 156 biases the lever 132 is reversed between the direction toward the non-locking position and the direction toward the locking position. When the lever 132 is in the spring reverse position, the spring 156 is most elastically deformed and the lever 132 is in an energetically high unstable state. The lever 132 does not remain stable in the spring reverse position, but is biased by the return force of the spring 156 in either the locked or unlocked position.

  In either the locked position or the non-locked position, the end of the arc slit 136 of the lever 132 is in contact with the angle restricting pin 154, and the lever 132 is biased 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 lock 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 an overlapping positional relationship when viewed from the front or back. Therefore, since the claw 138 of the lever 132 abuts against the striker 172 of the lock receiving portion 170 against the forward movement of the lower slider 90 in the fully open position, the forward movement of the lower slider 90 is hindered.

  On the other hand, when the lever 132 is in the non-locking position, the claw 138 and the striker 172 are separated in the left-right direction. That is, the claw 138 and the striker 172 are in a non-overlapping positional relationship as viewed from the front or back. Therefore, the claw 138 of the lever 132 does not abut the striker 172 of the lock receiving portion 170 against the forward movement of the lower slider 90 in the fully open position, so that the forward movement of the lower slider 90 is hindered. There is nothing to do.

  FIG. 10 is a top view of the lower slider 90 and its periphery when the lever 132 is in the unlocked position. FIG. 11 is a top view of the lower slider 90 and its periphery when the lever 132 is in the lock position. Furthermore, FIG. 4 is a perspective view of the lower slider 90 and the periphery thereof when the lever 132 is in the unlocked position as viewed from the inside of the cab 44.

  As can be seen from these figures, by observing the attitude of the lever 132, in particular, the position of the gripping portion 134, whether the lever 132 is in the locked position or the unlocked position, that is, the manual lock 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 operator who is easily accessible to the lever 132 from the inside of the cab 44 and who is inside the cab 44 holds the grip portion 134 of the lever 132 by hand and the lever 132 It is possible to easily switch between the locked state and the unlocked state of the manual lock mechanism 130 by rotating the

  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 is unexpectedly moved forward when the manual lock mechanism 130 is manually operated, It is also effectively prevented that you encounter danger.

  FIG. 12 shows how the manual lock mechanism 130 maintains the lock of the slide door 70 when the lever 132 is in the lock 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 lock position, the claw 138 of the lever 132 and the striker 172 of the lock receiving portion 170 are in an overlapping positional relationship as viewed from the front or back.

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

  FIG. 13 shows that 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. At the beginning of the movement of the slide door 70, the lever 132 is in the locked position.

  As shown in the upper part of FIG. 13, immediately before the slide door 70 reaches the fully open position, the claw 138 of the lever 132 abuts against the striker 172 of the lock receiving portion 170.

  Since the striker 172 is inclined with respect to the front-rear direction and the back surface of the claw 138 is inclined with respect to the front-rear direction more than the striker 172, as the slide door 70 moves further rearward, FIG. As shown in the middle row, the claw 138 rides over the striker 172. Thereby, the lever 132 is turned clockwise as viewed from above. When the claw 138 completely climbs over the striker 172, the lever 132 has exceeded the spring reverse position. As a result, as shown in the lower part of FIG. 13, the lever 132 moves to the unlocked position.

  Thereafter, as shown in the lower part of FIG. 13, the lower slider 90 abuts on the stopper 102 of the stopper bracket 100, the backward movement of the slide door 70 is stopped, and the slide door 70 is disposed at the fully open position.

  As described above, when the lever 132 in the locked position abuts against the striker 172, the lever 132 is rotated, so that the impact when the lever 132 abuts on the striker 172 is relieved. As a result, damage or breakage of the lever 132, the striker 172, the lower slider 90, the lower guide rail 64 and the like can be suitably avoided.

  FIG. 14 shows that 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 lock position, the claw 138 of the lever 132 and the striker 172 of the lock receiving portion 170 are in an overlapping positional relationship as viewed from the front or back. . For this reason, the forward movement of the slide door 70 is restricted because the claw 138 of the lever 132 abuts against the striker 172 of the lock receiving portion 170 when the lower slider 90 moves forward.

  As shown in the middle part 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 back. Not in a positional relationship.

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

  FIG. 15 shows how the lever in the unlocked position is moved to the locked position by manual operation 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 do not overlap each other when viewed from the front or back. is there.

  Therefore, as shown in the middle part of FIG. 15, when the lower slider 90 is moved backward with the backward movement of the slide door 70, the claw 138 of the lever 132 contacts the striker 172 of the lock receiving portion 170. Pass the striker 172 without touching.

  Thereafter, as shown in the lower part of FIG. 15, the lower slider 90 abuts on the stopper 102 of the stopper bracket 100, the movement of the slide door 70 to the rear is stopped, and the slide door 70 is disposed at the fully open position.

  Thereafter, 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 an overlapping positional relationship as viewed from the front or the back. For this reason, the forward movement of the slide door 70 is restricted because the claw 138 of the lever 132 abuts against 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 such as the crane 10 having the cab 44 provided with the lockable slide door 70 in the fully open position.

  Although the embodiment described above exemplifies the case where the cab body 60 has the entrance 60a on the left side, the mechanism relating to the slide door 70 of this embodiment is the mechanism with respect to the cab body 60 having the entrance 60a on the right side. Even, it is applicable similarly. Further, in the embodiment described above, the cab 44 of the crane 40 has been described as an example, but the mechanism relating to the slide door 70 of the present embodiment is also applicable to the cab of a construction machine other than a crane.

  Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to these embodiments, and various changes and modifications may be made without departing from the scope of the invention. It is also good. The various modifications and changes referred to herein include implementations that appropriately combine the above-described embodiments.

DESCRIPTION OF SYMBOLS 10 ... Crane car, 20 ... Traveling body, 22 ... Wheel, 24 ... Mounting stand, 26 ... Cab, 28 ... Outrigger, 40 ... Crane, 42 ... Swirling body, 44 ... Cab, 46 ... Boom, 48 ... A relief cylinder , 50: counter weight, 60: cab body 60a: entrance, 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 ... Locking mechanism, 120 ... Automatic temporary locking mechanism, 122 ... leaf spring for temporary lock, 122a ... protrusion, 122b ... recess, 130 ... manual lock mechanism, 132 ... lever, 134 ... small amount Department, 136 ... circumferential slit, 138 ... nails, 152 ... holding pin, 154 ... angle regulating pin, 156 ... spring 170 ... lock receiving portion, 172 ... striker.

Claims (5)

A construction machine having a cab, wherein the cab is
A cab body with an entrance;
A slide door that opens and closes the entrance by sliding relative to the cab body;
A construction machine comprising a lock mechanism for locking the slide door in a fully open position of the slide door.   The construction machine according to claim 1, wherein the locking mechanism is operated manually.   The construction machine according to claim 1, wherein the cab body is provided with a guide rail that guides the slide door, and the guide rail is provided to face the slide door.   The construction machine according to claim 3, wherein the locking mechanism is located within the height of the guide rail.   The construction machine according to any one of claims 1 to 4, further comprising a revolving unit on which the operator's cab is mounted.