JP3155451B2 - Work machine coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machine mounting device for mounting a work machine such as a backhoe on a tractor.

[0002]

2. Description of the Related Art A conventional connecting device for a working machine is provided with a connecting portion at a rear portion of a tractor as described in, for example, Japanese Patent Application Laid-Open No. 6-264465. A pair of upper and lower rocking members that are freely pivotally supported and can be opened and closed in the opposite direction, a biasing unit that urges the pair of rocking members in the expanding direction, and a stopper that regulates the position in the expanding direction. A connected portion having a lock means for holding the closed state when the pair of swing members is closed, and disposing the connecting portion between the pair of swing members, Closed,
In some cases, the connecting portion and the connected portion are connected by holding the closed state by the locking means.

The urging means comprises tension springs vertically disposed between a hook piece projecting from upper and lower ends of a pair of upper and lower rocking members and a support plate pivotally supporting the rocking members. The stopper is urged in the expanding direction by interposing an urging means, and the stopper forms a regulating surface on the opposing surfaces of the pair of swinging members, and regulates the expanding position by contacting the upper and lower regulating surfaces with each other. It is used as a stopper.

[0004]

In the above-mentioned connecting device for a working machine, since the urging means is located outside the upper and lower ends of the swinging member in the vertical direction, the space for providing the urging means is limited. It is necessary to increase the size of the connected portion, which hinders downsizing of the work machine. Particularly, regarding the upper urging means, the operation of the work machine behind the connected portion in a state where the tractor and the work machine are connected to each other. If there is a step for the person,
The space at the foot was narrowed, and it was to be supported for getting on and off. Further, since urging means are required at two places above and below the swinging member, the number of parts is increased, which causes an increase in cost.

[0005] Further, the stopper can be made compact because the restricting surfaces provided on the opposing surfaces of the pair of rocking members are used as the stoppers. However, each of the restricting surfaces is associated with the rotation of the rocking member. It is difficult to make the opposing regulating surfaces abut at the regular position because of the change in position, and it is therefore difficult to always regulate the position of the pair of swinging members in the expanding direction at a fixed position. By this, the position of the expanded portion of the pair of swinging members and the relative position of the connecting portion is changed, and the connection between the connecting portion and the connected portion,
That is, there is a possibility that the connection between the tractor and the working machine is hindered.

Therefore, the present invention aims at reducing the size of the connected portion and reducing the cost, and also ensures that the restricting position of the connected portion in the expanding direction is always kept at a fixed position, thereby ensuring the connection between the tractor and the working machine. It is an object of the present invention to provide a connecting device of a working machine which can be performed at a time.

[0007]

According to the present invention, one of the tractor 1 and the working machine 7 has a connecting portion 17 and the other has a connected portion 42, and the connected portion 42 has a support plate 39. A pair of oscillating members 43 which are pivotally supported so as to be freely openable and closable in opposing directions, an urging means 48 for urging the pair of oscillating members 43 in the expanding direction, and a position in the expanding direction. It has a stopper 45 for regulating, and a lock means 53 for holding this closed state when the pair of swinging members 43 are closed, and the connecting portion 17 is disposed between the pair of swinging members 43 and In order to achieve the above-mentioned object, in a working machine connecting device for connecting the connecting portion 17 and the connected portion 42 by closing the pair of swing members 43 and holding the closed state by the locking means 53, Has taken technical measures.

That is, the present invention is characterized in that the urging means 48 is provided so as to span the side surfaces of the pair of swing members 43. The stopper 45 is arranged between the pair of swing members 43 such that the opposing surfaces of the pair of swing members 43 come into contact with each other, and is fixed to the support plate 39.

[0009]

The urging means 48 for urging the pair of rocking members 43 of the connected portion 42 provided in one of the tractor 1 and the working machine 7 in the expanding direction is provided on the side of the pair of rocking members 43. The urging means 48 is provided over the swinging member 4.
3 can be made compact within the area of the side surface of the tractor 1, thereby enabling the tractor 1 to be compact.
When there is a driver's step behind the connected portion 42 with the working machine 7 connected to the vehicle, there is no problem in getting on and off the vehicle. Further, since the urging means 48 is bridged between the pair of swinging members 43, only one urging means 48 can be provided, and the number of parts can be reduced and cost can be reduced.

Further, since the stopper 45 is arranged between the pair of swing members 43 so as to abut on the opposing surfaces of the pair of swing members 43 and is fixed to the support plate 39,
While the size is reduced, the opposing surfaces of the pair of rocking members 43 abut against the stopper 45 fixed to the support plate 39, so that the position regulation in the expanding direction is made constant. The relative position between the open portion and the connecting portion 17 is also constant, so that the work machine 7 can be securely mounted on the tractor 1.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 5, reference numeral 1 denotes a tractor having a vehicle body 8 including an engine, a transmission case, etc., a front wheel 2 provided at a front portion of the vehicle body 8, a rear wheel 3 provided at a rear portion, and the like.
A hydraulic device 9 for lifting and lowering the working machine and a floor sheet 10 that covers the hydraulic device 9 are provided at the rear upper portion.
A seat 5 is provided on an upper portion of the floor sheet 10 via a reversing support device 65 so that the seat 5 can be inverted between a frontward posture and a rearward posture, and a handle 4 is provided at a front portion of the seat 5. A front loader 6 is mounted on a front part of the tractor 1 and a backhoe (working machine) 7 is mounted on a rear part thereof in a detachable manner.

At the lower part of the vehicle body 8, a mounting frame 13 used for mounting the working machine 7 is provided.
Reference numeral 3 denotes a front and rear main frame member 14 provided on the lower left and right sides of the vehicle body 8, an outer frame member 15 provided on the left and right outer sides of the main frame member 14 so as to protrude upward, and The mounting frame 13 is connected to a rear axle case 11 of the rear wheel 3 via a bracket 12.

A receiving member 18 is fixed to the left and right inside of the rear lower portion of the outer frame member 15 so as to protrude rearward from the vehicle body 8, and the receiving member 18 is formed with a concave portion 19 which is open upward. This is connected to a connection bar 40 described later. A mount bar (connecting portion) 17 having a horizontal axis is disposed above the receiving member 18, and the mount bar 17 is fixed between the outer frame member 15 and the inner frame member 16. ing.

As shown in FIG. 6, the machine frame 2 of the backhoe 7
2 includes a pair of upper and lower main frame members 23, a front frame member 24 connecting the front end portions of the upper and lower main frame members 23, an intermediate frame member 25 connecting the middle portions of the upper and lower main frame members 23, and the like. Become. A turning frame 26 is attached to the rear ends of the upper and lower main frame members 23 so as to be swingable right and left around the vertical axis, and can be turned by a pair of left and right turning cylinders 27. Is pivotally mounted, and is swingable up and down by a boom cylinder 29. A base of an arm 31 rotated by an arm cylinder 30 is pivotally attached to a distal end of the boom 28, and a bucket 33 is pivotally supported at the distal end of the arm 31, and swings by a bucket cylinder 32 via a link mechanism. Is done.

A step 37 is provided on the upper part of the machine casing 22, and a control box 38 is provided on the step 37.
Is installed. Also, on the left and right sides of the machine frame 22,
A stabilizer 35 is provided via a bracket 34 so as to be vertically swingable by a swing cylinder 36. Machine frame 22
A support plate 39 is fixed to the left and right sides of the front of the connecting bar.
0 are provided, and both ends of the connecting bar 40 in the left-right direction are projected outward from the support plate 39 in the left-right direction, and a guide plate 51 is fixed to the left-right outside of the lower end of the support plate 39. The plate 51 has a guide portion 51a whose lower end is inclined inward in the left-right direction.

A connected portion 42 having a pair of mount holders (oscillating members) 43 vertically opposed to each other is disposed above the connecting bar 40 of each support plate 39 and on the outer side in the left-right direction. . The connected portion 42 is pivotally supported by a support plate 39 so as to be swingable and can be opened and closed in the opposite direction.
, A stopper 45 for regulating the position in the expanding direction, and a pair of mount holders 4.
Locking means 5 for maintaining this closed state when 3 is closed
And 3.

The pair of upper and lower mount holders 43 is
Upper and lower support shafts 41 each having a horizontal axis on the outer surface of 9
a and 41b, and are provided so as to be freely opened and closed by swinging in opposite directions. The support shaft 41a for supporting the upper mount holder 43 is provided between the left and right support plates 39, and the support shaft 41b for supporting the lower mount holder 43 is provided separately for left and right. The upper and lower support shafts 4 are provided on the outer surface side of the pair of upper and lower mount holders 43.
A holding plate 46 fixed by bolts 46a is provided at outer end portions of 1a and 41b.

The urging means 48 comprises a tension spring or the like, and is bridged between the left and right outer surfaces of the pair of mount holders 43. The urging means 48 includes upper and lower support shafts 4.
Behind the pair of mount holders 43, the pair of mount holders 43 are hooked and connected to locking projections 49 protruding outward from the respective lateral outer surfaces of the pair of mount holders 43. 48 act to pull each other, and urge the mount holder 43 to expand toward the tractor 1 side (forward). Therefore, the urging means 48 is accommodated within the area of the side surface of the mount holder 43, and the connected portion 42 is downsized. Further, since the urging means 48 is bridged between the pair of swinging members 43, only one urging means 48 can be provided, and the number of parts can be reduced and cost can be reduced.

The mount holder 43 and the support plate 39
Since the support plate 39 and the holding plate 46 are related only through the support shafts 41a and 41b, the outer shapes of the support plate 39 and the holding plate 46 can be reduced with the outer shape of the mount holder 43. The holding plate 46 has an arc-shaped long hole 47 through which a locking projection 49 that moves with rotation of the upper and lower mount holders 43 is inserted.

On the opposing surfaces of the pair of mount holders 43,
An arc-shaped recess 44 is formed to fit into the mount bar 17 provided on the mounting frame 9 on the tractor 1 side.
The rear of 4 is cut away to form an open engaging recess 50 toward the rear. In addition, when the pair of mount holders 43 is expanded, the stopper 45 that is brought into contact with the engagement concave portion 50 is disposed between the pair of mount holders 43. The stopper 45 is formed in a rod shape and is fixed to the support plate 39 by protruding inward in the left-right direction from the inner side surface of the holding plate 46.

When the pair of mount holders 43 and the mount bar 17 are connected, the support plate 39 and the pressing plate 46 on the side of the recess 44 are formed in a U-shape so as not to interfere with the mount bar 17. Notched. The lock means 53 is disposed behind the mount holder 43, and regulates the expansion of the mount holder 43 when the mount holder 43 is closed, that is, maintains the closed state. The locking means 53 includes a locking member 54 having a head portion 54a fitted into the engaging recess 50 and a shaft portion 54b having a front portion fixed to the outside in the left-right direction of the head portion 54a. The mount holder 43
Has an operation unit 55 for performing forward and backward operations.

The operating portion 55 includes a support shaft 56 projecting outward in the left-right direction on the outer surface of the support plate 39, an operation lever 57 rotatably supported by the support shaft 56, and an operation lever 5.
7, and has an arm 58 connected to a pin 62 provided at the front of a shaft 54a of the lock member 54.
The rear portion b is axially slidably supported by a support plate 59 fixed to the main frame member 23 on the upper side of the machine frame 22, and a compression spring 64 is provided between the support plate 59 and the pin 62.
Is clad.

A positioning member 63 having a cut-out recess 63a opened upward is fixed to the rear surface of the support plate 59. Two holes 60 and 61 are formed in the shaft portion 54b in the front and rear direction in the axial direction. The rear hole 61 is opposed to the notch recess 63a of the positioning member 63, and the locking pin 52 is inserted into the hole 60, and the notch is formed. The locking member 54 is held at the locking position by being locked in the concave portion 63a, and the locking pin 52 is inserted through the front hole 60 so as to face the cutout concave portion 63a.
By locking, the lock member 54 is held at the retracted position. The rear portion of the holding plate 46 is provided with the lock member 5.
The front portion of the fourth shaft portion 54b is cut out in a U-shape so as not to interfere.

As shown in FIGS. 5 and 7, the seat 5 of the tractor 1 has a forward-facing posture A used when the tractor travels on the road and work by the front loader 6, and a seat 5 used when the backhoe 7 is operated. Backward posture B
At the same time, the posture can be changed by the reversing support device 65. As shown in FIG. 7, reference numeral 70 denotes a fixed base mounted on the floor sheet 10 side of the vehicle body 2, and a pair of left and right side walls 67 is erected on the mounting plate 66, and a front side wall is provided on a front portion of the mounting plate 66. A plate 68 is erected, and the rear ends of the left and right side wall plates 67 are connected by a connecting plate 69.

The lower ends of a pair of front and rear parallel links 71 are supported on the left and right side walls 67 of the fixed base 70. The lower ends of the front and rear parallel links 71F and 71R are pivotally connected to front and rear horizontal shafts 72F and 72R provided on the fixed base 70, and can swing from a front upward inclined state to a rear upward inclined state. The rear parallel link 71 </ b> R in the rear upwardly inclined state is held by abutting on the connecting plate 69 of the fixed base 70.

The front-rear parallel links 71F, 71R are each formed of two right and left links.
A support table 73 is connected to each upper end of R via front and rear support shafts 74F and 74R. And the rear parallel link 71R
Has an arm 75 projecting downward from the lower end, and a rod 76 is fixed between the left and right arms 75.
The tension spring 86 is stretched between the front horizontal shaft 72F and the front horizontal shaft 72F.

When the rear parallel link 71R swings, the rod 23 crosses the center line of the front and rear horizontal shafts 4F and 4R, and the parallel links 71F and 71R are moved by the tension spring 86.
Is always urged in the upright direction (upper end upward). 7
Reference numeral 7 denotes a swivel, which is mounted on the support 73 so as to be swivelable about a central longitudinal axis 78, and a lock pin 8 provided on the support 73.
7 is removably locked in two front and rear locking holes 89 provided in the swivel table 77, and locked in one of the front and rear locking holes 89, so that a frontward posture A and a rearward posture B are achieved. Is set to

A pair of left and right guide rails 80 are fixed on the swivel table 77, and the sliding plates 7 are attached to the left and right guide rails 80.
9 is provided so as to be slidably fixed in the front-rear direction, so that the sliding plate 79 can be fixed in the position slid by the front-rear positioning means (not shown). The front of the sliding plate 79 is pivotally connected to the front of the seat 5 via a pivot 81, and the rear of the sliding plate 79 is provided with a cushion 82 for receiving the rear of the seat 5. By rotating the seat 5 around the pivot 81, the swivel table 77 can be exposed.

In the vicinity of the lower end of the rear parallel link 71R,
A locking member 84 is provided which engages with an end of a rod 76 provided on an arm 75 which swings integrally therewith. The locking member 84 is swingably supported around a support pin 85 provided on a fixed base 70. I have. The locking body 84 has a bell crank shape,
and a front contact portion 84a and a rear contact portion 84b which are bifurcated into upper and lower portions through the front and rear contact portions 84a and 84b.
Are pivotally supported by support pins 85.

When the rear parallel link 71R is in the front upward direction, the front contact portion 84a is engaged with the end of the rod 76, and in the rear upward state, the rear contact portion 84b is engaged with the end of the rod 76. Thus, the upward swing of the parallel link 71 is restricted, thereby restricting the seat 5 from rising above the set height. The lower portion of the locking body 84 is provided with the locking body 8.
An operation member 83 is provided via a pin 93 for swinging the 4 to be disengaged from the end of the rod 76, and the operation member 83
A position where the front contact portion 84a or the rear contact portion 84b of the locking body 84 is engaged with the end of the rod 76 by a spring 83a so as to be slidably supported by the front side wall plate 68 of the fixing base 70 in the front-rear direction. It is urged to be. Further, a cushion means 94 made of a spring, a rubber body, or the like is provided at a lower front portion of the support base 73 to set a lower limit when the parallel link 71 is directed forward and upward.

The lock pin 87 is urged downward via a compression spring 88 on the lower surface of the support base 73, and abuts the lower end of the lock pin 87 at the center in the left-right direction of the front support shaft 74F. Lock pin 8 between swing table 77 and support table 73
A cam 90 is provided for engaging and disengaging the engagement by the lever 7. As shown in FIGS. 8 and 9, the cam 90 has an arcuate portion in a side view and a planar portion, and the arcuate portion is a lock pin when the parallel link 71 is in a front upward direction and a rear upward direction. When the parallel link 71 is in an upright state, the lock pin 87 is pushed down by a compression spring 88 to push down the lock pin 87 by a compression spring 88. The lock release surface 92 is detachable from the locking hole 89. The lock release surface 92 is formed in a substantially planar shape perpendicular to the longitudinal direction of the front parallel link 71F.

With the above configuration, the backhoe 7 is mounted on the tractor 1, and the seat 5 is changed from the front posture A to the rear posture B (see FIG. 7), so that the work with the backhoe 7 is enabled. The operation up to will be described. First, when the backhoe 7 is detached from the tractor 1, as shown in FIG.
Prior to mounting the backhoe 7 on the tractor 1, the locking member 54 removes the locking pin 52 to release the holding by the positioning member 63, and the head 54a is mounted on the mount holder. 43 is in contact with the rear surface. The backhoe 7 holds the left and right stabilizers 35 and the bucket 33 in a state where they are grounded.

To attach the backhoe 7 to the tractor 1, the stabilizer 35, the boom 28 and the like are operated to arrange the connecting bar 40 above the receiving member 18, and the stabilizer 35 is raised to move the backhoe 7 up. Then, the connecting bar 40 is fitted into the concave portion 19 of the receiving member 18 from above. Then, the connecting bar 40 is connected to the receiving member 18 so as to be rotatable around the left-right axis.

At this time, the mount bar 17 is located in front of the mount holder 43, and the pair of mount holders 43 are expanded by being pulled together by the urging means 48, and the opposing surfaces thereof are supported. Since it is in contact with the stopper 45 fixed to the plate 39, the position of the expanded portion is always constant, and therefore, the relative position with respect to the mount bar 17 is also always constant so that the mounting can be surely performed.

Next, the machine frame 22 of the backhoe 7 is rotated around the connecting bar 40 to bring the mount holder 43 close to the tractor 1 side. Then, the mount bar 17 is moved to the position shown in FIG.
As shown in FIG. 4B, the rear end portion of the arc-shaped concave portion 44 is pressed by the mount bar 17 while being inserted between the mount holders 43, and the mount holder 43 is urged as shown in FIG. The closing operation is performed against the means 48, and the mount bar 17 is sandwiched between the pair of mount holders 43.

At this time, with the closing operation of the mount holder 43, the engaging recess 50 expands and the head 54a of the lock member 54 is urged by the compression spring 64, and
0, the head 54 enters between the mount holders 43 and is sandwiched therebetween, and the urging means 48 of the mount holder 43
Is prevented from opening. In this state, the notch recess 63 a of the positioning member 63 and the hole 61
And the locking pin 52 is inserted and locked to lock the locking means 5.
By holding 3 in the locked position, the mounting bar 1
The mount frame 43 of the backhoe 7 is connected and fixed to the mounting frame 9, and the backhoe 7 is mounted on the tractor 1.

As described above, the backhoe 7 is connected to the tractor 1
In this state, the step 37 of the backhoe 7 is located rearward of the connected portion 42. However, since there is no protrusion above the connected portion 42, the space at the foot of the driver is reduced. It can be secured and does not hinder getting on and off. Next, the operation of reversing the sheet 5 by the reversing support device 65 will be described. First, when the sheet 5 is in the frontward posture A state, the end of the rod 76 between the left and right arms 75 provided at the lower end of the rear parallel link 71R is Locking body 84
By contacting the front contact portion 84a, the upward swing of the parallel link 71 is regulated, and the lower portion is elastically supported by a tension spring 86 and a cushion means 94 below.
Further, a lock surface 91 of a cam 90 provided on the front support shaft 74F.
Pushes up the lock pin 87 to lock the swivel 77,
The seat 5 is maintained in the forward posture A.

Then, the operating member 83 is pulled forward to separate the front contact portion 84a of the locking member 84 from the end of the rod 76. Then, the parallel links 71F and 71R are raised by the tension spring 86, and when the sheet 5 comes to the uppermost position (the tension spring 86 is in the neutral state), the support 73
The lower end of the lock pin 87 is the lock release surface 92 of the cam 90.
, And the locked state of the swivel base 77 is automatically released.

Then, after the seat 5 is turned 180 degrees and turned rearward, the parallel links 71F and 71R are swung to the rear upward inclined state where they come into contact with the connecting plate 69 against the tension spring 86. Due to this swing, the lower end of the lock pin 87 moves from the lock release surface 92 of the cam 90 to the lock surface 91, and is automatically pushed upward to engage with the locking hole 89 on the rear side of the swivel. Then, the rear contact portion 84b of the locking body 84 contacts the end of the rod 76 to prevent the seat 5 from rising.

As described above, the locked state and the unlocked state of the lock pin 87 can be automatically performed by swinging the parallel link 71 back and forth. For example, when the seat 5 is at the uppermost position, the lock pin is manually operated. The operation of releasing the sheet 5 and the like can be smoothly performed without reversing the sheet 5. In order to release the backhoe 7 from the above-mentioned mounted state,
By pulling out the locking pin 52 and moving the operation lever 57 backward, the lock member 54 is moved backward to release the head 54a from the engagement concave portion 50 and to keep the head 54a at the retracted position. Then, in this state, the reverse operation is performed. Further, the seat 9 is moved from the rearward posture B to the frontward posture A.
When the posture is changed to the above, the operation member 83 may be pushed rearward to disengage the rear contact portion 84b of the locking member 84 from the end of the rod 76 and perform the reverse operation.

The present invention is not limited to the above-described embodiment, but can be modified as appropriate.
Can be provided on the working machine 7 side, respectively, and the stopper 45 of the mount holder 43 can be
It can be provided on the support plate 39 side in a laterally outwardly protruding shape instead of the 6 side. The reversing support device 65 for the sheet 5
Of the rear support shaft 74R instead of the front support shaft 74F.
In this case, the lock pin 87 may be provided at the rear of the support base 73.

[0042]

According to the present invention, a biasing means provided on one of the tractor and the working machine for biasing the pair of swinging members of the connected portion in the expanding direction is extended over the side surfaces of the pair of swinging members. Since the biasing means is provided within the area of the side surfaces of the pair of swinging members, the connected portion can be made compact. Even when there is a driver's step behind the connecting portion, there is no problem in getting on and off the vehicle. In addition, since the urging means is bridged between the pair of swing members, only one urging means can be used, and the number of parts can be reduced and cost can be reduced.

Further, since the stopper is arranged between the pair of swing members so as to abut on the opposing surfaces of the pair of swing members, and is fixed to the support plate, the stopper can be made compact. When the opposing surfaces of the pair of rocking members abut against the stopper fixed to the support plate, the position of the rocking member in the expanding direction is regulated, whereby the relative position between the expanded portion of the rocking member and the connecting portion is also fixed. Thus, the work machine can be securely mounted on the tractor.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing an embodiment of the present invention.

FIG. 2 shows an embodiment of the present invention, and is a view taken on line CC of FIG.

FIG. 3 shows an embodiment of the present invention and is a cross-sectional view taken along the line DD of FIG.

4 (a) and 4 (b) are operational views showing an embodiment of the present invention, in which (a) shows a state in which the swinging member is expanded, and (b) shows a state in which the swinging member is closed and connected to the connecting portion.

FIG. 5 is an overall configuration diagram of an embodiment of the present invention.

FIG. 6 is a partial cross-sectional side view showing an embodiment of the present invention, particularly showing a configuration of a working machine.

FIG. 7 is a partial cross-sectional side view illustrating a configuration of a reversing support device according to an embodiment of the present invention.

FIG. 8 is a side sectional view showing an embodiment of the present invention and showing an upper portion of the reversing support device.

9 shows an embodiment of the present invention and is a cross-sectional view taken along the line EE of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 7 Work implement (backhoe) 17 Connecting part (mount bar) 42 Connected part 43 Swinging member (mount holder) 45 Stopper 48 Urging means 53 Locking means

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02F 3/40 A01B 59/043

Claims (2)

(57) [Claims] A tractor (1) and a working machine (7) are provided with a connecting portion (17), and the other is provided with a connected portion (4).
2), wherein the connected portion (42) is pivotally supported by a support plate (39) so as to be pivotable and can be opened and closed in an opposing direction; and a pair of pivoting members (43). An urging means (48) for urging the member (43) in the expanding direction, a stopper (45) for regulating the position in the expanding direction, and a pair of rocking members (43)
Locking means (5) for maintaining this closed state when the
3), the connecting portion (17) is arranged between the pair of swing members (43) to close the pair of swing members (43), and is closed by the locking means (53). In the connecting device of the working machine for connecting the connecting portion (17) and the connected portion (42) by holding the urging means (48), the urging means (48) is connected to the pair of swing members (43).
A connecting device for a working machine, wherein the connecting device is provided so as to be bridged over a side surface of the work machine. 2. The stopper (45) is disposed between the pair of swing members (43) such that the opposing surfaces of the pair of swing members (43) are in contact with each other, and the support plate (39) is provided. The connecting device for a working machine according to claim 1, wherein the connecting device is fixed to the work machine.