JP2011117196A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction machine capable of preventing a striker provided on a door of a cab from coming into contact with an obstacle around the machine even when running or working while the door is closed and improving its workability. <P>SOLUTION: The folding type door 22 opening and closing a getting-in-and-out doorway 21 in a cab box 13 includes the bending type striker 33, which is constituted to bend for the folding type door 22 to store it along an external face of the folding type door 22 when a worker works while closing the getting-in-and-out doorway 21 by the folding type door 22. Consequently, an engaging part 35 of the bending type striker 33 is bent and stored along the folding type door 22 when the worker works while closing the folding type door 22. As a result, amount of protrusion of the bending type striker 33 for the folding type door 22 can be suppressed to small extent to prevent it from coming into contact with an obstacle in the surroundings. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a construction machine such as a hydraulic excavator provided with a cab on which an operator rides.

  Generally, a hydraulic excavator as a construction machine has a small excavator called a mini excavator suitable for work in a narrow work site. This small excavator is adapted to travel and work in a narrow site. The upper swing body is formed small.

  Here, a small hydraulic excavator includes a self-propelled lower traveling body, an upper revolving body that is rotatably mounted on the lower traveling body, and a cab is provided on a revolving frame that forms a support structure, It is mainly constituted by a working device provided so as to be able to move up and down in front of the upper swing body and in the front side in the rear direction.

  The cab of the excavator is provided with five pillars that are located on the left front, right front, left middle, left rear, and right rear and extend upward and downward. The front, left front side, and left rear are provided between the pillars. Front and rear with the left intermediate pillar as a fulcrum for opening and closing a hollow cab box provided with side, right side, rear and top surfaces, and the entrance between the left front pillar and the left intermediate pillar of the cab box And a door that is pivotable in the direction.

  Further, the door is provided with a striker that protrudes outward from the outer side surface thereof, and the left rear side surface of the cab box is engaged with the striker when the door is opened to the rear open position. A catch that holds the door in the open position is provided (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent Laid-Open No. 11-100844 JP 2006-21753 A

  By the way, in the hydraulic excavator by each patent document mentioned above, the striker provided in the door protrudes outward from the outer surface of the door so that it can engage with a catch. Therefore, when the vehicle travels in a narrow field with the door closed, or when the upper swing body is swung, the striker protruding from the door may come into contact with surrounding obstacles. For this reason, the operator must work so that the striker does not come into contact with surrounding obstacles, and there is a problem that workability deteriorates.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to prevent the striker from touching surrounding obstacles even when the vehicle is running or working with the door closed. Thus, an object of the present invention is to provide a construction machine that can improve workability.

  A construction machine according to the present invention includes a self-propelled lower traveling body, an upper revolving body in which a cab is provided on a revolving frame that is mounted on the lower traveling body so as to be pivotable and forms a support structure, and the upper revolving body The cab has five pillars that are located on the left front, right front, left middle, left rear, and right rear and extend upward and downward. A hollow cab box having a front surface, a left front side surface, a left rear side surface, a right side surface, a rear surface and a top surface between the pillars, and a boarding / alighting between the left front pillar and the left intermediate pillar of the cab box. A door provided to be pivotable forward and backward with the left intermediate pillar as a fulcrum to open and close the mouth, a striker provided to project outward from the door, and a left rear side of the cab box Open the door to the rear And a catch for holding the door in an open position engaged with the said striker when.

  And in order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the striker stores the door along the door when the door is closed at the closed position. The configuration is such that the door can be bent.

  According to a second aspect of the present invention, the striker is engaged with the catch when the base end side is attached to the door and when the door is opened to the rear open position provided at the distal end side of the fixing portion. The engaging portion is configured by a mating engaging portion and a rotating connecting portion that is provided between the fixing portion and the engaging portion and rotatably connects the engaging portion to the fixing portion.

  According to a third aspect of the present invention, the door is provided with a stopper that fixes the striker in a retracted position when the striker is bent.

  According to the invention of claim 1, the striker is configured to be bent with respect to the door. Therefore, when the door is opened, the striker is extended so as to protrude, so that the catch can be engaged with the cab box, and the door can be held in the open position. On the other hand, when the door is closed, the striker can be bent and stored on the door side, and the protruding amount of the striker can be kept small.

  As a result, by bending the striker, the striker can be prevented from coming into contact with surrounding obstacles when the excavator is traveling or turning, so the operator can concentrate on work without paying attention to the striker. Workability can be improved.

  According to the invention of claim 2, the striker includes a fixing portion whose proximal end is attached to the door, an engaging portion that is provided on the distal end side of the fixing portion and engages with the catch, and the fixing portion and the engaging portion. Therefore, the striker itself can be provided with a bending function. Thereby, it is possible to easily store the striker only by attaching a bending type striker instead of the existing fixed type striker without adding any processing to the door side.

  According to the invention of claim 3, since the door is provided with the stopper that fixes the striker in the retracted position when the striker is bent, the striker bent due to vibration or the like during running or working is extended. Can be prevented, damage to the striker can be prevented, and reliability can be improved.

It is a front view which shows the small hydraulic excavator applied to the 1st Embodiment of this invention. It is the top view which looked at the hydraulic excavator from the upper side. It is the external appearance perspective view which looked at the hydraulic excavator which abbreviate | omitted the working apparatus from the upper left back side. It is the external appearance perspective view which looked at the hydraulic excavator of the state which opened the door of the cab to the open position from the same position as FIG. It is the external appearance perspective view which looked at the upper turning body from the upper left front. It is the cross-sectional view of the principal part expansion which looked at the cab etc. from the arrow VI-VI direction in FIG. It is the cross-sectional view of the principal part expansion which looked at the cab etc. of the state which opened the door to the open position from the same position as FIG. It is sectional drawing of the principal part expansion which shows the internal structure of a catch. It is sectional drawing of the principal part expansion which looked at the catch which the striker engaged from the same position as FIG. It is a perspective view of the principal part expansion which shows the striker and stopper of an expansion | extension state with a part of door. It is a perspective view of the principal part expansion which shows the state which hold | maintained the bent striker with the stopper with a part of door. It is a disassembled perspective view which decomposes | disassembles and shows a bending type striker. It is a front view which shows the small hydraulic excavator applied to the 2nd Embodiment of this invention. It is the external appearance perspective view which looked at the hydraulic excavator which abbreviate | omitted the working apparatus from the upper left back side. It is a cross-sectional view of the principal part expansion which looked at the cab etc. from the arrow XV-XV direction in FIG. It is the cross-sectional view of the principal part expansion which looked at the cab etc. of the state which opened the door to the open position from the same position as FIG.

  Hereinafter, as a construction machine applied to an embodiment of the present invention, a cab specification hydraulic excavator will be described as an example and described in detail with reference to the accompanying drawings.

  First, FIGS. 1 to 12 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a cab specification hydraulic excavator as a construction machine applied to the present embodiment. The hydraulic excavator 1 is a small excavator called a mini excavator suitable for work on a narrow work site. . The hydraulic excavator 1 includes a lower traveling body 2 capable of self-running, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and front and rear front sides of the upper revolving body 3. And a work device 4 for performing excavation work of earth and sand.

  Here, as shown in FIG. 2, the upper turning body 3 has a left and right width dimension substantially equal to the vehicle width of the lower traveling body 2 and has a virtual turning radius R around the turning center O. It is formed in a substantially circular shape as seen from above so as to fit within the circle C. As a result, the excavator 1 is rearward so that the rear surface of the counterweight 6 described later is substantially within the vehicle width of the lower traveling body 2 when the upper revolving body 3 turns on the lower traveling body 2 about the turning center O. It is configured as a small swivel excavator.

  The turning radius R is defined by the distance from the turning center O to the rear surface of the counterweight 6, and the virtual circle C is a locus of the rear surface of the counterweight 6 when the upper swing body 3 is turned. Yes. That is, the protruding amount of the virtual circle C is a small dimension (for example, about 10 to 30 mm on one side in the vehicle width direction) with respect to the vehicle width direction of the lower traveling body 2.

  The upper revolving unit 3 includes a revolving frame 5 that forms a support structure, and an engine 7 and a cab 8 that will be described later provided on the revolving frame 5. In addition, the working device 4 is attached to the front side of the revolving frame 5 so as to be swingable and capable of moving up and down.

  Reference numeral 6 denotes a counterweight provided at the rear portion of the revolving frame 5, and the counterweight 6 balances the weight with the work device 4. Further, as shown in FIG. 2, the counterweight 6 is formed in an arc shape so as to cover an engine 7 described later from the rear side.

  Reference numeral 7 denotes an engine (illustrated by a dotted line in FIG. 1) which is located at the front portion of the counterweight 6 and is mounted on the rear side of the turning frame 5. Are arranged. The engine 7 is for driving a hydraulic pump to rotate.

  Reference numeral 8 denotes a cab provided on the revolving frame 5. The cab 8 defines a driver's cab in which an operator is boarded, and is formed as a box-like body extending upward and downward. As shown in FIGS. 1 to 7, the cab 8 includes a floor member 9, a driver's seat 10, a cab box 13, a passenger door 21, a folding door 22, catches 24 and 31, strikers 32 and 33, which will be described later. Has been.

  Reference numeral 9 denotes a floor member (see FIGS. 4 and 5) that constitutes the bottom of the cab 8, and the floor member 9 is used by an operator. The floor member 9 has a front position attached to the front position of the revolving frame 5 and a rear position attached to the counterweight 6. The floor member 9 includes a step-like driver seat base 9A on which a driver seat 10 to be described later is attached and a footrest 9B on the front side of the driver seat base 9A on which an operator puts his / her foot. It is roughly constituted by. Further, a rear side of a cab box 13 described later is attached to the rear side of the driver seat base 9A, and a front side of the cab box 13 and a traveling operation lever / pedal 12 are attached to the front side of the footrest 9B.

  A driver's seat 10 is provided on the driver's seat base 9A. The driver's seat 10 is seated by an operator. Further, an operation lever 11 for work is provided on both the left and right sides of the driver's seat 10, and an operation lever / pedal 12 for traveling is provided at a front position of the footrest 9B on the front side.

  A cab box 13 is provided on the floor member 9, and the cab box 13 defines a cab on the floor member 9. The cab box 13 includes a left front pillar 14, a right front pillar 15, a left intermediate pillar 16, a left rear pillar 17, and a right rear pillar 18, which will be described later, extending in the upward and downward directions, as shown in FIGS. 4 and 5. It has five pillars and other pillars 19 and 20, and a space between the pillars 14 to 20 is a front surface portion 13A, a right side surface portion 13B, a rear surface portion 13C, a left front side surface portion 13D, a left rear side surface portion 13E, and a ceiling. It is a surface portion 13F.

  In this case, the left rear side surface portion 13E of the cab box 13 is formed as a curved surface having a convex arc shape outwardly from the left intermediate pillar 16 toward the left rear pillar 17, as shown in FIGS. Yes. Accordingly, the left rear side surface portion 13E can substantially fit the left rear side of the cab box 13 within the turning radius of the upper swing body 3 without narrowing the living space in the cab box 13. Further, as shown in FIG. 7, the left rear side surface portion 13 </ b> E serves as a fixed surface on which the door 22 is fixed at the open position when a folding door 22 described later is opened to the open position on the rear side. .

  Next, each pillar 14-18 is described. First, the left front pillar 14 is disposed at the left front portion of the cab box 13 and forms a ridge line between the front surface portion 13A and the left front side surface portion 13D. The right front pillar 15 is located at the right front portion of the cab box 13 and forms a ridge line between the front surface portion 13A and the right side surface portion 13B. The right rear pillar 18 is located at the right rear portion of the cab box 13 and forms a ridge line between the right side surface portion 13B and the rear surface portion 13C.

  The left intermediate pillar 16 is located on the left side of the cab box 13 and is provided at an intermediate portion in the front and rear directions. The left intermediate pillar 16 is located on the left side of the driver's seat 10 at the boundary position between the left front side surface portion 13D and the left rear side surface portion 13E. It is arranged in the vicinity. A folding door 22 that opens and closes an entrance 21 described later is attached to the left intermediate pillar 16 so as to be rotatable in the horizontal direction.

  Further, the left rear pillar 17 is disposed on the rear side of the cab box 13, and is disposed on the left side of the right rear pillar 18 with an interval of about half the width of the cab box 13. In this case, the left rear pillar 17 is located at a rear position of the driver's seat 10 in a range that does not impair the rear view of the operator seated on the driver's seat 10, preferably in a range just behind the width of the driver's seat 10. It is arranged.

  On the other hand, 19 is a left roof pillar disposed on the upper left side of the cab box 13 (see FIG. 5). The left roof pillar 19 includes a left front side surface portion 13D, a left rear side surface portion 13E and a top surface portion 13F of the cab box 13. A ridgeline between the two is formed. And the rear part side of the left roof pillar 19 is curved in a convex arc shape at a portion located between the pillars 16 and 17. Reference numeral 20 denotes a right roof pillar disposed on the upper right side of the cab box 13, and the right roof pillar 20 forms a ridge line between the right side surface portion 13B and the top surface portion 13F.

  21 is an entrance / exit provided between the left front pillar 14 and the left middle pillar 16 of the cab box 13. This entrance / exit 21 is used by an operator to get on and off the cab 8 and is opened and closed by a folding door 22 described later.

  Reference numeral 22 denotes a folding door that is rotatably attached to the left intermediate pillar 16 of the cab box 13. The foldable door 22 opens and closes the entrance 21 and is provided so as to be pivotable forward and backward with the left intermediate pillar 16 as a fulcrum. Further, as shown in FIGS. 3, 5, and 6, the folding door 22 is rotated to the front side to close the entrance 21 of the cab box 13, and as illustrated in FIGS. 4 and 7. The door 21 is pivoted rearward to open the entrance 21 and to be opened and closed between the open position facing the left rear side surface portion 13E of the cab box 13.

  The folding door 22 includes, for example, a first door panel 22A formed in an elongated rectangular shape extending upward and downward so as to cover the rear half of the entrance 21 and the left intermediate pillar of the cab box 13 with the door panel 22A. For example, two door hinges 22 </ b> B disposed between the door panel 22 </ b> A and the left intermediate pillar 16 with an interval between the door panel 22 </ b> A and the left intermediate pillar 16 to cover the front half of the entrance 21. And a second door panel 22C formed in an elongated rectangular shape extending upward and downward, and upward and downward between the door panels 22A and 22C in order to foldably attach the second door panel 22C to the door panel 22A. For example, two intermediate hinges 22D arranged at intervals.

  A fixed striker 32 is provided on the outer surface of the first door panel 22A to engage with a first catch 24 described later and hold the first door panel 22A in the open position. Further, on the outer surface of the second door panel 22C, a handle 22E that is rotated when an operator or the like gets into the cab 8 and a second catch 31 described later are engaged to open the second door panel 22C. A bending striker 33 is provided to hold the position.

  Thereby, when each door panel 22A, 22C of the foldable door 22 is in the closed position shown in FIGS. 3 and 6, the door panels 22 </ b> A and 22 </ b> C extend in a substantially planar shape to close the entrance / exit 21 of the cab box 13. On the other hand, when each door panel 22A, 22C is opened to the open position shown in FIGS. 4 and 7, the left rear side surface portion of the cab box 13 is bent in a substantially L shape in the reverse direction around the intermediate hinge 22D. It can be folded along 13E.

  In the open position of the door panels 22A and 22C, catches 24 and 31 to be described later and strikers 32 and 33 engage with each other to hold the folding door 22 in the open position. Thus, by folding back each door panel 22A, 22C in the open position of the foldable door 22, the dimension that each door panel 22A, 22C, etc. protrudes to the side from the vehicle width range is kept small.

  Here, the foldable door 22 is configured to be folded along the left rear side surface portion 13E of the cab box 13 as described above. At this time, the first door panel 22A that rotates rearward from a position close to the left intermediate pillar 16 can be disposed at a position close to the left rear side surface portion 13E. On the other hand, the second door panel 22C that rotates rearward from a position away from the left intermediate pillar 16 extends to a position that reaches the counterweight 6, so that the left side portion of the counterweight 6 is obstructive. It is difficult to approach the left rear side surface portion 13E.

  Therefore, on the upper side of the left rear side surface portion 13E of the cab box 13, a door cushion 23 that elastically contacts when the folding door 22 is opened to the open position is provided. The door cushion 23 regulates the opening of the foldable door 22 at a position where it does not interfere with the counterweight 6 and reduces the impact at this time.

  Next, the catches 24 and 31 and the strikers 32 and 33 provided in the cab box 13 and the folding door 22 in order to hold the folding door 22 in the open position will be described.

  Reference numeral 24 denotes a first catch provided on the left rear side surface portion 13 </ b> E of the cab box 13. As shown in FIG. 7, the first catch 24 is engaged with a fixed striker 32 provided on the first door panel 22A when the folding door 22 is opened to the rear open position. The folding door 22 is held in the open position. Moreover, since the 1st catch 24 engages with the fixed striker 32 provided in 22 A of 1st door panels, it is arrange | positioned near the front side of the left rear side surface part 13E.

  As shown in FIGS. 8 and 9, the first catch 24 is fixed to the left rear side surface portion 13E of the cab box 13, and has a box-like case 25 having a notch groove 25A formed on the outer portion thereof. The case 25 is pivotably mounted, and one end side is divided into two, the receiving claw 26A and the engaging claw 26B, the engaging member 26 having a projection 26C on the other end side, and the hooking claw 26B A first spring member 27 that urges the engagement member 26 in a direction away from the notch groove 25A, and a pawl 28A on one end side that is rotatably mounted in the case 25 are protrusions of the engagement member 26. An operating member 28 engaged with the portion 26C and projecting from the case 25 at the other end, and a second spring member 29 urging the operating member 28 in a direction in which the pawl 28A approaches the engaging member 26; It is comprised by.

  In addition, one end of a release wire 30 that is pulled when releasing the engagement of the fixed striker 32 is connected to the other end of the operation member 28. The other end of the release wire 30 is connected to a release lever (not shown) attached to the left intermediate pillar 16 or the like, for example.

  On the other hand, 31 indicates a second catch provided on the left rear side surface portion 13E of the cab box 13. As shown in FIG. 7, the second catch 31 is engaged with a bending striker 33 provided on the second door panel 22C when the folding door 22 is opened to the rear open position. The second door panel 22C is held in the open position. Further, since the second catch 24 is engaged with the bending striker 33 provided on the first door panel 22A, the second catch 24 is disposed near the rear side of the left rear side surface portion 13E. Since the configuration of the second catch 31 is the same as that of the first catch 24, the same reference numerals are given and the description thereof is omitted.

  Here, as shown in FIG. 8, when the fixed striker 32 is guided by the notch groove 25 </ b> A of the case 25 and presses the receiving claw 26 </ b> A of the engaging member 26, the first catch 24 is a first spring member. 27, the engaging member 26 is rotated, and the hook claw 26B is engaged with the fixed striker 32 as shown in FIG. At this time, by engaging the catch 26 </ b> A of the operation member 28 with the protrusion 26 </ b> C of the engagement member 26, the engagement member 26 can be locked and the fixed striker 32 can be prevented from being pulled out.

  On the other hand, when releasing the engagement of the fixed striker 32, as shown in FIG. 8, the release lever is operated to pull the other end portion of the operating member 28, and the pawl 28A is moved to the protruding portion of the engaging member 26. The fixed striker 32 can be removed from the first catch 24 by being separated from 26C.

  The second catch 31 also has a function similar to that of the first catch 24 described above, and can hold or release a bending striker 33 described later in an engaged state.

  Reference numeral 32 denotes a fixed striker provided on the first door panel 22 </ b> A of the foldable door 22, and the fixed striker 32 is provided so as to protrude outward from the first door panel 22 </ b> A so as to correspond to the first catch 24. It has been. The fixed striker 32 is formed by bending a rod-like body into a U-shape, for example, and both ends thereof are screwed to the first door panel 22A. Here, the fixed striker 32 is provided in the first door panel 22A that can be brought close to the left rear side surface portion 13E of the cab box 13 in the open position shown in FIG. Can do. Thereby, since the fixed striker 32 does not have a possibility of interfering with surrounding obstacles, it can be a fixed type with a simple configuration.

  Reference numeral 33 denotes a bending striker provided on the second door panel 22 </ b> C of the folding door 22. As shown in FIGS. 10 and 11, the bendable striker 33 is provided so as to be bendable with respect to the second door panel 22C, so that when the foldable door 22 is closed at the closed position, the second door panel It can be stored along the outer surface of 22C. The bending striker 33 is provided so as to protrude outward at the front side position of the second door panel 22 </ b> C so as to correspond to the second catch 31.

  Here, since the bending striker 33 is provided on the second door panel 22C that is difficult to approach the left rear side surface portion 13E of the cab box 13 in the open position shown in FIG. ing. For this reason, the bending striker 33 has a configuration that can be folded and stored because it may interfere with surrounding obstacles.

  That is, as shown in FIG. 12, the bending striker 33 includes a fixing portion 34 having a base end side that is a threaded portion 34 </ b> A and a tongue-like connecting plate portion 34 </ b> B protruding from the tip end side, and a distal end side of the fixing portion 34. An engaging portion 35 in which two sticking plate portions 35A project in parallel with a predetermined gap at both ends, and the rod-like body is bent in a U shape. The coupling plate 36 is provided between the coupling plate portion 34 </ b> B and each clamping plate portion 35 </ b> A of the engaging portion 35, and includes a coupling pin 36 that rotatably connects the engaging portion 35 to the fixing portion 34. Here, the connecting plate portion 34B of the fixing portion 34, the sandwiching plate portion 35A of the engaging portion 35, and the connecting pin 36 constitute a rotating connecting portion that rotatably connects the engaging portion 35 to the fixing portion 34. ing.

  Further, the holding plate portion 35A of the engaging portion 35 is formed with a corner portion 35A1 only on the front side which is one side in the width direction. Thereby, the engaging part 35 can be bent only to the rear side without the corner part 35A1. In addition, when the engaging portion 35 is extended so as to be straight with respect to the fixed portion 34, the corner portion 35A1 of the holding plate portion 35A abuts on the fixed portion 34, so that the second catch 31 can be engaged. The engaging portion 35 can be disposed at an accurate position.

  In the bending striker 33, the screw portion 34A of each fixing portion 34 is attached to the second door panel 22C of the folding door 22 via a nut 37 (see FIGS. 10 and 11). In this state, as shown by the arrow in FIG. 10, the engaging portion 35 can be placed at the retracted position as shown in FIG. 11 by pushing the engaging portion 35 rearward by hand. In the retracted position of the engaging portion 35, the protruding dimension of the bending striker 33 can be kept small.

  A stopper 38 is provided on the second door panel 22C of the foldable door 22. The stopper 38 tilts the engaging portion 35 of the bending striker 33 rearward as shown in FIG. When it is stored along the, it is fixed at this storage position. The stopper 38 is formed by, for example, bending a plate made of spring steel or the like into a substantially L shape, and has a circular arc shape that holds the engaging portion 35 on the distal end side that is the long side. A holding portion 38A is formed.

  The stopper 38 is screwed to the second door panel 22 </ b> C at the base end side, which is the short side, so that the holding portion 38 </ b> A comes into contact with the engaging portion 35 being pressed. As a result, the stopper 38 can fix the engaging portion 35 of the bending striker 33 in the retracted position, and the bending striker 33 that has been bent by vibration during running or work can be extended. Can be prevented.

  Reference numeral 39 denotes an exterior cover provided on the turning frame 5 around the cab 8 (see FIG. 2 and the like). The exterior cover 39 covers devices such as the engine 7, the hydraulic oil tank, and the fuel tank (all not shown) mounted on the revolving frame 5.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration, and the operation thereof will be described next.

  The operator opens the foldable door 22, gets into the cab 8 from the entrance 21 and sits in the driver's seat 10, and operates the operating lever / pedal 12 for traveling to cause the lower traveling body 2 to travel. Can do. Further, by operating the operation lever 11 for work, the upper swing body 3 can be turned, or the work device 4 can be moved up and down to perform excavation work of earth and sand.

  Here, when working with the hydraulic excavator 1, there are a case where the work is performed with the folding door 22 opened and the entrance 21 opened, and a case where the work is performed with the folding door 22 closed.

  First, for example, when working with the folding door 22 opened in order to work while exchanging information with surrounding workers, the engagement portion 35 of the bending striker 33 is extended, The folding door 22 is opened to the rear open position, the fixed striker 32 is engaged with the first catch 24, and the bending striker 33 is engaged with the second catch 31. Thereby, the work can be performed in a state in which the folding door 22 is opened.

  On the other hand, when the work is performed with the folding door 22 closed, the engaging portion 35 of the bending striker 33 is tilted rearward by hand and stored along the second door panel 22C. The part 35 is fixed to the storage position by the stopper 38. Thereby, the work can be performed in a state where the protruding dimension of the bending striker 33 is kept small.

  Thus, according to the first embodiment, the folding door 22 of the cab 8 is provided with the bending striker 33, and the bending striker 33 performs the work by closing the entrance 21 with the folding door 22. In this case, the folding door 22 is configured to be bendable so that it can be stored along the outer surface of the folding door 22.

  Therefore, when the work is performed with the folding door 22 opened, the engagement portion 35 of the bending striker 33 is extended so as to protrude, so that the second cab provided on the cab box 13 side. The catch 31 can be engaged, and the folding door 22 can be held in the open position. On the other hand, when working with the folding door 22 closed, the engaging portion 35 of the bending striker 33 can be bent so that the folding door 22 can be stored along the folding door 22. The protruding amount of the bending striker 33 can be kept small.

  As a result, by bending the engaging portion 35 of the bending striker 33, the bending striker 33 can be prevented from coming into contact with surrounding obstacles when the excavator 1 is traveling or turning. It is possible to concentrate on work without paying attention to the striker 33, and workability can be improved.

  In addition, the bending striker 33 includes a fixing portion 34 whose proximal end is attached to the folding door 22, an engagement portion 35 that is provided on the distal end side of the fixing portion 34 and engages with the second catch 31, Since the fixing portion 34 and the engaging pin 35 are pivotally connected to each other, the bending striker 33 itself can have a bending function.

  Accordingly, the storage function can be easily provided only by attaching the bending type striker 33 instead of the existing fixed type striker without any processing on the folding door 22 side. Moreover, since the fixing portion 34 and the engaging portion 35 are simply connected by the connecting pin 36, the engaging portion 35 can be tilted or raised by hand.

  In addition, the holding plate portion 35A of the engaging portion 35 constituting the bending striker 33 is formed with a corner portion 35A1 only on the front side which is one side in the width direction. Thereby, the engaging part 35 can be bent only to the rear side without the corner part 35A1. When the engaging portion 35 is extended so as to be straight with respect to the fixing portion 34, the corner portion 35A1 of the holding plate portion 35A is brought into contact with the fixing portion 34 to engage with the second catch 31. The engaging portion 35 can be disposed at an accurate position where the engaging portion 35 can be moved, and the raising operation of the engaging portion 35 can be performed easily and accurately.

  Furthermore, the folding door 22 is provided with a stopper 38 that fixes the engaging portion 35 to the retracted position when the engaging portion 35 of the bending striker 33 is bent. It is possible to prevent the engaging portion 35 of the bending striker 33 bent by vibration or the like from being extended (the state where it is raised), and it is possible to prevent damage to the bending striker 33 and improve reliability.

  Next, FIGS. 13 to 16 show a second embodiment of the present invention. The feature of this embodiment is that the door of the cab is formed by one panel, and one striker is provided on this door. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  13 and 14, reference numeral 41 denotes a door that is rotatably attached to the left intermediate pillar 16 of the cab box 13 instead of the folding door 22 according to the first embodiment. The door 41 opens and closes the entrance 21 and is formed by a single panel that is provided to be pivotable forward and backward with the left intermediate pillar 16 as a fulcrum. As shown in FIG. 15, the door 22 is rotated to the front side to close the entrance 21 of the cab box 13, and the door 22 is rotated to the rear side to enter the entrance 21 as shown in FIG. Is opened and closed between the open position facing the left rear side surface portion 13E of the cab box 13.

  The door 41 is attached to the left intermediate pillar 16 of the cab box 13 so as to be horizontally rotatable by two door hinges 41A. Further, on the outer surface of the door 41, there are provided a handle 41B and a bendable striker 43 that engages with a catch 42 to be described later and holds the door 41 in the open position.

  Reference numeral 42 denotes a catch provided on the left rear side surface portion 13E of the cab box 13, and the catch 42 is configured similarly to the catch 24 according to the first embodiment. As shown in FIG. 16, the catch 42 is configured to hold the door 41 in the open position by engaging with the bending striker 43 when the door 41 is opened to the rear open position. .

  Reference numeral 43 denotes a bending striker provided on the door 41. The bending striker 43 is configured in the same manner as the bending striker 33 except that the length dimension (projection dimension) is smaller than that of the bending striker 33 according to the first embodiment. The bending striker 43 protrudes outward at an intermediate position in the front and rear directions of the door 41 so as to correspond to the catch 42. The door 41 is provided with a stopper 44 for fixing the bending striker 43 at the storage position.

  Thus, also in the second embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment described above. In particular, according to the second embodiment, the present invention can also be applied to the case where only the bending striker 43 is provided on the door 41 made of one panel.

  In the first embodiment, the cab 8 is provided with the folding door 22 including the first door panel 22A, the second door panel 22C, and the like, the first door panel 22A is provided with the fixed striker 32, and the second The case where it was set as the structure which provides the bending type striker 33 in the door panel 22C was illustrated. However, the present invention is not limited to this. For example, the bending striker 33 may be provided on both the first door panel 22A and the second door panel 22C. Further, the first striker 33 may be provided on the first door panel 22A and the second striker 32 may be provided on the second door panel 22C.

  In the first embodiment, the first door panel 22A of the foldable door 22 is provided with a stopper 38 that fixes the engaging portion 35 of the bending striker 33 in the retracted position. The portion 38 </ b> A is held by being pressed against the engaging portion 35. However, the present invention is not limited to this. For example, the engaging portion 35 may be held between two facing stoppers. Moreover, it is good also as a structure which hold | maintains the engaging part 35 using a magnet. This configuration can be similarly applied to the second embodiment.

  In the first embodiment, the bending striker 33 is constituted by the fixing portion 34, the engaging portion 35, and the connecting pin 36, and is bent at an intermediate position of the bending striker 33 itself. Illustrated. However, the present invention is not limited to this, and the striker may be stored along the outer surface of the door by, for example, attaching the striker to the door so that the striker can be bent (turned). This configuration can be similarly applied to the second embodiment.

  Furthermore, in each embodiment, the cab specification hydraulic excavator 1 provided with the crawler type lower traveling body 2 was described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator provided with a wheel-type lower traveling body.

1 Excavator (construction machine)
DESCRIPTION OF SYMBOLS 2 Lower traveling body 3 Upper revolving body 4 Working device 5 Swing frame 8 Cab 9 Floor member 10 Driver's seat 13 Cab box 13A Front surface part 13B Right side surface part 13C Rear surface part 13D Left front side surface part 13E Left rear side surface part 13F Top surface part 14 Left front pillar 15 Right front pillar 16 Left middle pillar 17 Left rear pillar 18 Right rear pillar 21 Entrance / exit 22 Folding door 22A First door panel 22C Second door panel 24 First catch 31 Second catch 32 Fixed striker 33, 43 Bending type Striker 34 fixed part 34B connecting plate part (rotating connecting part)
35 engaging portion 35A clamping plate portion (rotating connecting portion)
36 connecting pin (rotating connecting part)
38, 44 Stopper 41 Door 42 Catch

Claims (3)

A self-propelled lower traveling body, an upper revolving body that is mounted on the lower traveling body so as to be capable of swiveling and that has a cab on a revolving frame, and a front side in front and rear of the upper revolving body And a working device provided so that it can be raised and lowered,
The cab is
There are five pillars that are located on the left front, right front, middle left, left rear, and right rear and extend upward and downward. The front, left front, left rear, right, rear, and ceiling are provided between the pillars. A hollow cab box that became a surface,
A door provided to be pivotable forward and backward with the left intermediate pillar as a fulcrum to open and close the entrance between the left front pillar and the left intermediate pillar of the cab box;
A striker provided to project outward from the door;
In a construction machine provided with a catch that is provided on the left rear side of the cab box and that engages the striker when the door is opened to the rear side and holds the door in an open position.
The construction machine according to claim 1, wherein the striker is configured to be bent with respect to the door so as to be stored along the door when the door is closed at a closed position.   The striker includes a fixing portion whose base end is attached to the door, an engagement portion that is provided on a distal end side of the fixing portion and engages with the catch when the door is opened to a rear open position; The construction machine according to claim 1, wherein the construction machine is configured by a rotation connecting portion that is provided between the fixing portion and the engaging portion and rotatably connects the engaging portion to the fixing portion.   The construction machine according to claim 1 or 2, wherein the door is provided with a stopper that is fixed to a retracted position when the striker is bent.

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