JP2003276655A - Theft prevention device for turning working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the operation of a turning working machine with a crawler belt locked by a lock mechanism. <P>SOLUTION: This theft prevention device for the turning working machine is provided with a pair of left/right crawler traveling parts 3L and 3R with a crawler belt 4 wound around front/rear idlers 11 and a drive wheel 10, and a turning mount 6 allowing a person to get in/off from one part in the left/right direction on the pair of left/right crawler traveling parts 3L and 3R. The lock mechanism 55 non-rotationally locking the crawler belt 4 is provided in the crawler traveling part 3L in the getting-in/off side out of the pair of left/right crawler traveling parts 3L and 3R. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antitheft device for a swing working machine such as a backhoe.

[0002]

2. Description of the Related Art As shown in FIG. 22, a backhoe, which is a swing working machine, includes an upper swing body 111 and a lower traveling device 112. The traveling device 112 includes front and rear idlers and drive wheels. A pair of left and right crawler traveling portions 115L, 115 around which the crawler belt 113 is wound.
R, and a driver's seat 116 is provided on the revolving structure 111,
From one side (left side) of the swing structure 111 in the left-right direction, the driver's seat 11
There is one that gets on and off on the 6 side. In the conventional turning work machine of this type, as shown in FIG.
Locking mechanism 11 for locking 13 so that it cannot rotate
7 on the right side of the crawler traveling section 11 opposite to the boarding / alighting side.
It was attached to 5R.

[0003]

Therefore, in the conventional case,
Since it is difficult to visually check the lock mechanism 117 when getting on and off a turning work machine such as a backhoe, turning is performed without noticing that the crawler belt 113 remains locked by the lock mechanism 117 so as not to rotate. There is a risk of operating the work machine, which may damage the crawler traveling unit 115R and the like. In view of the above-mentioned problems, the present invention can prevent the turning work machine from being operated while the crawler belt is locked by the lock mechanism.

[0004]

The technical means of the present invention for solving this technical problem is to provide a pair of left and right crawler traveling portions in which a crawler belt 4 is wound around front and rear idlers 11 and drive wheels 10. In the anti-theft device for a swing working machine, which includes a pair of left and right crawler traveling units 3L and 3R, and a swivel base 6 which can get on and off from one of the left and right directions, the pair of left and right crawler traveling units 3L is provided. , 3R, a crawler traveling portion 3L on the entry / exit side is provided with a lock mechanism 55 that locks the crawler belt 4 in a non-rotatable manner.

Another technical means of the present invention is a lock mechanism 5.
The point 5 is located in front of the swivel base 6.
Another technical means of the present invention is that the locking mechanism 55 locks the crawler belt 4 so that the crawler belt 4 cannot rotate.
Is provided with a lock pin that penetrates through and is held on the frame 14 side. According to another technical means of the present invention, the lock mechanism 55 includes a lock pin that is passed through the idler 11 to the left and right and is held on the frame 14 side so that the crawler belt 4 cannot be rotated. It is in.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 and FIG. 2, reference numeral 1 denotes a backhoe which is exemplified as a turning work machine, and the backhoe 1 is mainly composed of an upper turning body 2 (machine body) and a lower traveling device 3, and the turning body 2 is A small rear small swing backhoe in which the rear surface side of the revolving structure 2 is formed in an arc shape in plan view so that the rear surface side of the revolving structure 2 does not extend beyond the left and right width of the traveling device 3 even when it revolves around the vertical axis X. Is called.

The traveling direction of the backhoe 1 (the left-right direction in FIG. 1) is called the front-back direction, and the lateral direction orthogonal to the front-back direction (the paper-penetrating direction in FIG. 1) is the left-right direction. The revolving structure 2 includes a revolving base 6 which is supported on the traveling device 3 so as to be revolvable around the vertical axis X, a working device (excavation device) 7 provided in front of the revolving base 6, and a revolving base 6. Driver's seat 8 provided
And engine, fuel tank, hydraulic pump, hydraulic oil tank, control valve, radiator, oil cooler,
It is configured to include a reserve tank, various devices mounted on the swivel base 6 such as a battery, and the like.

The driver's seat 8 is arranged on the left side of the swivel base 6, and an entrance 18 is provided only on the left side of the swivel base 8 so that the driver can get on and off the swivel base 6 only from the left side. The revolving base 6 includes a revolving base plate 22 supported on the traveling device 3 via a bearing body 21 so as to be revolvable around the vertical axis X, and a reinforcing member and various devices are mounted and fixed on the revolving base plate 22. And a counter that constitutes the rear part of the swivel base 6 while ensuring the weight balance of the front part of the swivel base 6 with respect to the working device 7 and the like, which is mounted and fixed to the rear part of the swivel frame. The weight 20 is mainly configured, and the right and left side surfaces, the front surface and the upper surface of the turning frame such as the front side of the driver's seat are appropriately covered.
Covered by etc.

The rear and right sides of the upper surface of the revolving frame are covered with a bonnet. Swivel board 22
A pair of upper and lower support brackets 26 are provided on the front portion of the above so as to project forward from the swivel base 6, and a swing bracket 27 is supported on the support bracket 26 so as to be swingable right and left around a vertical axis. A boom 28 swingably supported around the horizontal axis on the swing bracket 27, and an arm 29 swingably supported around the horizontal axis on the tip end side of the boom 28.
And the bucket 30 attached to the tip end side of the arm 29 so as to be able to perform the squeeze / dump operation, and the working device 7 is mainly configured. The boom 28, the arm 29, and the bucket 30 are booms each including a hydraulic cylinder. Cylinder 31, arm cylinder 32, bucket cylinder 3
3 is operable.

1 to 4, the traveling device 3 includes drive wheels 10 arranged at the rear portion, idlers 11 (idling wheels) arranged at the front portion, and these drive wheels 10 on both left and right sides of the track frame 9. And a idler 11 are rotatably supported by a plurality of rolling wheels 12, and a rubber or iron endless belt-shaped crawler belt 4 is wound around the driving wheels 10, the idler 11, and the rolling wheels 12. And a pair of left and right crawler traveling units 3L configured to circulate the crawler belt 4 by driving the driving wheel 10 with a hydraulic motor M or the like.
A crawler traveling device including 3R is adopted, and a dozer 5 is provided at the front part of the traveling device 3.

The track frame 9 is roughly composed of a center frame 13 and side frames 14 arranged on both left and right sides of the center frame 13. The center frame 13 has an upper frame member 15
And a lower frame member 16. The center frame 13 rotatably supports the revolving structure 3 on the upper surface thereof via the bearing body 21, and also supports the dozer 5 at the front part thereof. Further, a pair of left and right support brackets 43 are provided at the center of the center frame 13 in the left-right direction, and a pair of left and right support brackets 42 are provided on both the left and right sides of the support bracket 43. There is.

A rear end side of a dozer cylinder that raises and lowers the dozer 5 is pivotally supported by a central support bracket 43 so as to be rotatable about an axial center in the left-right direction. The rear end sides of the left and right support arms that form the swing frame are rotatably supported about the horizontal axis. Left and right side portions of the center frame 13 have left and right leg portions C1 and C2 protruding from the center portion outward in the left and right direction and connected to the left and right side frames 14. The lower frame member 16 is formed of a single plate member from the center portion of the center frame 13 to the legs C1 and C2, and the left and right sides of the lower frame member 16 include the legs C1 and C2. The upper frame member 15 includes a central portion 15A in which a bearing body receiving portion is formed and an upper wall 15B made of a plate material that constitutes the upper surfaces of the leg portions C1 and C2. It is formed as a member and is fixed by welding or the like to be integrated.

The center portion of the center frame 13 is located higher than the side frame 14, and the leg C
1, C2 (outer side portion of the center frame 13) are formed in an inclined shape that moves downward in the left-right direction. As shown in FIG. 3, the left and right side frames 14 are arranged on the side of the center frame 13 and are connected to the legs C1 and C2. The main frame 35 is long in the front-rear direction and the rear end side of the main frame 35. And a motor case 36 provided in the.

The main frame 35 (including an idler holding portion 34, which will be described later) includes an upper wall 38, an inner side wall 39 extending downward from the inner end side of the upper wall 38 in the left-right direction, and an outer end of the upper wall 38 in the left-right direction. And an outer wall 40 extending downward from the side. The upper wall 15B (plate material) constituting the upper surfaces of the legs C1 and C2 is the upper wall 3 of the main frame 35.
It is fixed to No. 8 by welding or the like. Mainframe 3
In the lower part between the inner and outer side walls 39 and 40 of 5, the rolling wheels 12 are arranged at an interval in the front-rear direction and are rotatably supported around the axis in the left-right direction.

The front end portion of the main frame 35 serves as an idler holding portion 34, as also shown in FIGS.
In order to avoid interference with the idler 11, the upper wall 38 of the idler holding portion 34 is formed with a notched groove 41 which is open and is U-shaped in plan view. As shown in FIG. 5, the motor case 36 includes a side wall 44, a top wall 45, a bottom wall 46, and a front wall 47.
And a rear wall 48 are formed in a box shape having an opening on the inner side in the left-right direction, and a side wall 44 is provided with a mounting opening 51.
The hydraulic motor M is supported by the motor case 36 via the mounting opening 51 so as to project inward and outward. Motor case 36
A projecting portion 52 projecting outward is provided at the front end portion of the.

The motor case 36 is a main frame 35.
It is fixed to the rear end by welding, fasteners or other fixing means. A hydraulic motor M for driving the drive wheels 10 is held in the motor case 36 so as to project outward in the left-right direction, and the drive wheels 10 are attached and fixed to the projecting portions.
The crawler belt 4 is wound around the driving wheel 10, the idler 11, and the rolling wheel 12 so as to surround the side frame 14. The drive wheel 10 is rotationally driven by a hydraulic motor M so as to be able to rotate forward and backward, and in FIG. 1, the crawler belt 4 circulates counterclockwise by the counterclockwise rotation of the drive wheel 10 and the backhoe 1 advances. The clockwise rotation of the drive wheel 10 causes the crawler belt 4 to circulate in the clockwise direction and the backhoe 1 to move backward.

In FIGS. 4 and 6 to 9, the crawler belt 4 is rotated to the crawler traveling part 3L on the entry / exit side of the pair of left and right crawler traveling parts 3L, 3R, that is, the left crawler traveling part 3L. A lock mechanism 55 is provided for locking the lock. The lock mechanism 55 is arranged in front of the swivel base 6 and is arranged so as to project inward in the left-right direction from the crawler traveling unit 3L. Lock mechanism 5
5 is a U-shaped support member 56 and the idler holding portion 34.
The mounting member 57 projecting upward from the
The locking tool 61 shown in FIG. The engaging member 60 is shown in FIG.
0 and FIG. 11, the lock pin 58 and the connecting shaft 5
9 and. The mounting member 57 is fixed to the inner wall 39 of the idler holding portion 34 by welding or the like so as to project upward. The support member 56 includes a first holding portion 65 having a connecting hole 63 and an insertion hole 64, a second holding portion 67 having an insertion hole 66, and a connecting portion connecting the first holding portion 65 and the second holding portion 67. 69, and the support member 56 includes the first holding portion 6
5 and the second holding portion 67 sandwich the crawler belt 4 in the thickness direction, and the second holding portion 67 of the support member 56 is fitted onto the crawler belt 4 from the inside.
7, the lock pin 58 of the engaging member 60 is inserted into the insertion hole 64 of the first holding portion 65, the opening hole 72 of the crawler belt 4, and the insertion hole 66 of the second holding portion 67. There is. Further, the connecting shaft 59 is inserted into the connecting hole 63, and the locking rod 74 of the locking tool 61 is inserted into the inserted connecting shaft 59 through the mounting hole 73.
Is locked. As a result, the crawler belt 4 is attached to the left side frame 14 by the lock mechanism 55.
Is locked so that it cannot rotate.

According to the above embodiment, in order to prevent the backhoe 1 from being stolen, as shown in FIG. 8, the second holding portion 67 is provided in front of the swivel base 6 of the left crawler traveling portion 3L. The support member 56 is fitted into the crawler belt 4 from the inner side so that the crawler belt 4 is inserted in the mounting hole 71 of 57 and sandwiches the crawler belt 4 in the thickness direction by the first nipping portion 65 and the second nipping portion 67. And then the support member 5
6, the engaging member 60 is moved closer to the lock pin 58 from above, and the lock pin 58 is inserted into the insertion hole 64 of the first holding portion 65, the opening hole 72 of the crawler belt 4, and the insertion hole 66 of the second holding portion 67.
To insert. In addition, the connecting shaft 59 is inserted into the connecting hole 63,
The locking tool 6 is inserted into the inserted connecting shaft 59 through the mounting hole 73.
One locking rod 74 may be inserted and locked. As a result, in the left crawler traveling unit 3L, the crawler belt 4 is easily locked with respect to the side frame 14 so as not to rotate, and the backhoe 1 is prevented from being stolen.

When working on the backhoe 1, the lock mechanism 55 is the left crawler traveling section 3L, which is the same side as the side on which the backhoe 1 gets in and out, and is located in front of the swivel base 6, so that The lock mechanism 55 can be easily viewed when getting on and off the vehicle. Therefore, at this time, if the crawler belt 4 is still locked by the lock mechanism 55 so as not to rotate, this can be easily noticed, and the backhoe with the crawler belt 4 still locked so as not to rotate. 1 can be prevented from operating, and as a result, the crawler traveling portion 3L
It is possible to prevent damage etc.

To unlock the lock mechanism 55, the locking tool 61 is removed from the connecting shaft 59, and then the engaging member 60 is separated from the supporting member 56 upward and the lock pin 58 is inserted. Holes 64 and 66 and opening hole 72
The connection shaft 59 is extracted from the connection hole 63, and then the support member 56 is attached to the crawler belt 4.
The lock mechanism 55 can be removed smoothly without moving the swivel base 6 by moving the inward direction and removing it from the crawler belt 4. That is, FIG.
In the conventional revolving work machine shown in FIG. 2, since the left and right inner ends of the lock mechanism 117 are located below the revolving structure 111, when the lock mechanism 117 is locked and unlocked, the revolving structure 111 is indicated by a chain line. Rotate once in the direction of arrow a,
Although it is necessary to perform locking and unlocking operations after exposing the entire locking mechanism 117 to the outside, the locking and unlocking work was very complicated, but in the case of the above-described embodiment, the locking mechanism 55 is Since the swivel base 6 is located in front of the swivel base 6, the swivel base 6 does not become an obstacle when locking and unlocking the lock mechanism 55.

The lock mechanism 55 is arranged so as to project inward in the left-right direction from the crawler traveling portion 3L, and the mounting member 57 is attached to the side frame 14 (idler holding portion 34).
Since it is fixedly attached to the inner side of the crawler belt 4, the mounting member 57 does not interfere with the installation and removal of the crawler belt 4 of the crawler traveling portion 3L, and the crawler belt 4 can be easily mounted and installed from the outside. It can be removed and is very convenient. FIG. 13 shows another embodiment, in which the lock mechanism 55 is composed of a mounting member 57, a locking tool 61, and a chain 77, and the mounting member 57 is the idler holder 3
4 is fixed by welding or the like so as to project upward to the inner side wall 39 of the chain 4, and the chain 77 is inserted into the mounting hole 71 of the mounting member 57 and the opening hole 72 of the crawler belt 4 to make the crawler belt 4
The chain 77 is wound around the inner side thereof, and both ends of the chain 77 are connected by the locking rod 74 of the locking tool 61 so as to be locked.

The other points are the same as in the case of the above-mentioned embodiment, and like the case of the above-mentioned embodiment, the lock mechanism 55 can be easily visually checked when getting on and off the backhoe 1. It is possible to prevent the backhoe 1 from being operated while the crawler belt 4 is locked so as not to rotate. Further, when the crawler belt 4 of the crawler traveling unit 3L is attached and detached, the attaching member 57 does not become an obstacle. 14 and 1
5 shows another embodiment, the lock mechanism 55 is a pair of left and right mounting pieces 79 protruding upward from the idler holding portion 34, a lock pin 80 inserted into the idler 11, and a locking tool 61.
The lock pin 80 is inserted through the attachment holes 81 of the pair of attachment pieces 79 and the through hole 82 formed in the idler 11, and the insertion end portion of the inserted lock pin 80 is inserted through the attachment hole 84. The locking rod 74 of the locking tool 61 is inserted to lock the crawler belt 4 with respect to the left side frame 14 by the locking mechanism 55. .

The other points are the same as in the case of the above-described embodiment, and in this case as well, as in the case of the above-described embodiment, the lock mechanism 55 can be easily visually checked when getting on and off the backhoe 1. Therefore, it is possible to prevent the backhoe 1 from being operated while the crawler belt 4 is locked so as not to rotate. FIG. 16 shows another embodiment. In addition to the lock mechanism 55, a pair of left and right mounting pieces 79 projecting upward from the idler holding portion 34, a lock pin 80 inserted into the idler 11, and a locking tool 61 are provided. , The chain 87, the lock pin 80, and the mounting hole 8 of the pair of mounting pieces 79.
1 and the through hole 82 formed in the idler 11,
At the insertion end of the inserted lock pin 80, a mounting hole 84
The locking rod 74 of the locking tool 61 is inserted through the lock to lock the chain, and one end of the chain 87 is connected to the annular portion 88 on the head side of the lock pin 80, and the chain 77 is connected to the crawler belt 4. The crawler belt 4 is connected to the lock pin 80 by the chain 97 by inserting the locking rod 74 of the locking tool 61 through the opening hole 72 and inserting the locking rod 74 of the locking tool 61 into the other end of the chain 87.

The other points are the same as in the case of the embodiment of FIGS. 14 and 15. 17 to 19 show another embodiment, in which the lock mechanism 55 is provided in the motor case 36 of the left crawler traveling unit 3L, and the lock mechanism 55 is arranged behind the swivel base 6. The lock mechanism 55 is composed of a lock pin 91 and a locking tool 61, and the lock pin 91 is inserted into the insertion hole 9 of the drive wheel 10.
2 and through the side wall 44 of the motor case 36 through the mounting hole 93, and the locking rod 74 of the locking tool 61 is inserted into the end of the lock pin 91 through the mounting hole 95 for locking. This prevents the drive wheels 10 from rotating, thereby locking the crawler belt 4 so that it cannot rotate, thereby preventing theft.

In the embodiments of FIGS. 14 and 15 and the sixteenth embodiment, the pair of mounting pieces 79 having the mounting holes 81 sandwich the notch groove 41 in the upper wall 38 of the idler holding portion 34. However, instead of this,
As shown in FIGS. 20 and 21, a U-shaped reinforcing plate 97 in a plan view is provided inside the cutout groove 41 of the idler holding portion 34, and a pair of mounting pieces 79 having a mounting hole 81 is provided in the reinforcing plate 97. You may make it provide integrally. In addition, in the said embodiment, since the boarding / alighting entrance 18 is provided only in the left side of the swivel base 8 and it is comprised so that it may get in / out of the swivel base 6 only from the left side, a pair of right and left crawler traveling parts 3L and 3 are provided.
In the left crawler traveling section 3L which is the getting on and off side of R,
Although the lock mechanism 55 is provided, on the contrary, when the entrance 18 is provided only on the right side of the swivel base 8 and the swivel base 6 is configured to get on and off only from the right side, a pair of left and right crawlers is provided. The locking mechanism 55 may be provided on the right crawler traveling unit 3R, which is the entry / exit side of the traveling units 3L and 3R.

The turning working machine to which the invention of the present application is applied is not limited to the backhoe, and the crawler traveling units 3L and 3L.
It goes without saying that any revolving work machine including the R and the revolving base 6 can be applied to work machines other than the backhoe.

[0027]

According to the present invention, the lock mechanism 5 for disabling the crawler belt 4 is provided at the crawler running portion on the boarding / alighting side.
5, the lock mechanism 55 can be easily viewed when getting on and off the turning work machine, and it is possible to prevent the turning work machine from being operated while the crawler belt 4 is locked by the lock mechanism 55. Like

[Brief description of drawings]

FIG. 1 is an overall side view of a backhoe.

FIG. 2 is a plan view of a backhoe.

FIG. 3 is a side view of a track frame.

FIG. 4 is a front view of a truck frame.

FIG. 5 is a plan sectional view of a motor case portion of the truck frame.

FIG. 6 is a plan view of an idler holding portion of a track frame.

FIG. 7 is a front sectional view of a front end portion of a left crawler traveling portion.

FIG. 8 is a front cross-sectional view of the front end portion of the left crawler traveling unit.

FIG. 9 is a side view of the idler holder.

FIG. 10 is a front view of an engagement member of the lock mechanism.

FIG. 11 is a side view of an engagement member of the lock mechanism.

FIG. 12 is a front view of a locking tool of the lock mechanism.

FIG. 13 is a front cross-sectional view of the front end portion of the left crawler traveling portion showing another embodiment.

FIG. 14 is a plan view of an idler holding portion showing another embodiment.

FIG. 15 is a side view of the idler holder.

FIG. 16 is a front cross-sectional view of a front end portion of a left crawler traveling portion showing another embodiment.

FIG. 17 is a side view of a rear end portion of a left crawler traveling portion showing another embodiment.

FIG. 18 is a plan sectional view of a motor case portion.

FIG. 19 is a side view of a motor case portion.

FIG. 20 is a side view of an idle holding portion showing another embodiment.

FIG. 21 is a plan view of an idle holding unit.

FIG. 22 is a plan view of a backhoe showing a conventional example.

[Explanation of symbols]

1 backhoe 2 revolving structure 3 traveling devices 4 crawler belt 6 swivel base 10 drive wheels 11 idlers 14 Side frame 55 Lock mechanism 35 mainframe 58 Lock Pin

Claims (4)

[Claims] 1. A front and rear idler (11) and a drive wheel (1)
0) is provided with a pair of left and right crawler traveling parts (3L, 3R) around which the crawler belt (4) is wound, and the left and right crawler traveling parts (3L, 3R) are stepped on and off from one of the left and right directions. In an anti-theft device for a swivel work machine provided with a possible swivel base (6), a crawler belt (4) is provided at a crawler travel part (3L) on the entry / exit side of the pair of left and right crawler travel parts (3L, 3R). ) Is provided with a lock mechanism (55) for non-rotatably locking the). 2. The antitheft device for a swing working machine according to claim 1, wherein the lock mechanism (55) is arranged in front of the swivel base (6). 3. A lock mechanism (55) is provided for locking the crawler belt (4) so that the crawler belt (4) cannot rotate.
The anti-theft device for a swing working machine according to claim 1, further comprising a lock pin that penetrates through and is held on the frame (14) side. 4. The lock mechanism (55) is provided with a lock pin which is passed through the idler (11) left and right and held on the frame (14) side so as to make the crawler belt (4) non-rotatable. The antitheft device for a swing working machine according to claim 1, wherein the device is a burglarproof device.