JP4149247B2 - ROPS device for traveling vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lops device for a traveling vehicle such as a tractor.
[0002]
[Prior art]
The tractor lops device disclosed in Patent Document 1 divides the strut vertically into a lower strut having a lower body and an upper strut having a lower body, and the upper strut around the horizontal axis at the upper end of the lower strut. It is pivotably supported. Thus, the Lopse upper body is bent downward with respect to the Lopse lower body so as to prevent a collision between the Lopse upper body and the ceiling or the like when the garage is stored.
[0003]
[Patent Document 1]
JP 2000-92917 A (pages 3 to 6, FIG. 2)
[0004]
[Problems to be solved by the invention]
However, when lifting an upper body of the Lope in a downward bending posture, the operator needs to lift the Lope upper body so as to rotate around the horizontal axis, and thus the operation requires a great amount of labor.
In view of such a situation, the present invention provides a traveling vehicle that is easy to change in height by enabling the upper body of the lops to be moved up and down and holding the upper body of the lops at least at a raised position. An object is to provide a lops device.
[0005]
[Means for Solving the Problems]
The first specific means for solving the problems in the present invention includes a lower body having a pair of left and right lower struts erected on the rear part of a traveling vehicle, and a pair of left and right upper struts inserted into the lower struts so as to be movable up and down. A gate-shaped lops upper body, and holding means for holding the upper support column at least in a raised position.
As a result, the lops body can be moved up and down in the vertical direction, and can be held at a position where the lops body is raised at least, and the height change of the lops device can be facilitated. .
[0006]
The second specific means for solving the problem in the present invention is that the upper strut is moved in one direction when the holding strut is released and the upper strut is moved up and down between the lops lower body and the lops upper body. And has a check means for restricting movement in the other direction.
As a result, when the lops body is raised, the lops body is temporarily fixed at a midway position to prevent downward movement, and the burden on the operator during the lops raising work can be reduced.
[0007]
According to a third specific means for solving the problems in the present invention, the check means includes a check pin provided on the lower support column and rotatable about the pin axis, and provided on the upper support post and the check pin. And a plurality of temporary fixing holes that mate with each other and a biasing member that biases the check pin toward the temporary stop hole, and a peripheral edge of the temporary stop hole is engageable with a tip of the check pin. In addition, an inclined surface intersecting with the pin axis is formed.
As a result, the check pin can be engaged with the peripheral edge of the temporary fixing hole to prevent the lowering of the Lope upper body. Further, the inclined surface intersecting with the pin shaft core is engaged with the peripheral edge of the temporary fixing hole, so that the locked state between the two is released, and the upper support column, that is, the LOSS upper body can be raised.
[0008]
Further, since the check pin is rotatable around the pin axis, the lowering of the Lops upper body can be allowed and the rising can be restricted by turning the regulating surface and the inclined surface upside down. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, an agricultural tractor 44 is illustrated as a traveling vehicle.
In the tractor 44, an engine 45 and a transmission case 46 are directly connected to form a vehicle body 48. A front axle frame 49 projects forward from the engine 45, and the front axle case 49 is pivotally supported in the left-right direction. A rear axle case 47 projects from the rear portion of the transmission case 46 in the left-right direction. A rear axle is rotatably supported on the rear axle case 47, and a rear wheel 52B is attached to the tip thereof. Similarly, a front wheel 52A is attached to the front axle that is rotatably supported by the front axle frame 49.
[0010]
The upper portion of the vehicle body 48 is covered with a floor seat plate 54, a driver seat 50 is mounted on the upper portion of the vehicle body 48 and behind the transmission case 46, and rear wheel fenders 53 are provided on the left and right sides of the floor seat plate 54. ing. A control unit 51 is disposed in front of the driver's seat 50, and the front gate type lops device 1 for securing a good space around the driver's seat 50 is fixed to the rear axle case 47.
The lops device 1 includes a lops upper body 5 and a lops lower body 4 that supports the lops upper body 5, and the lops lower body 4 includes a pair of left and right lower columns 2.
[0011]
The pair of left and right lower columns 2 are hollow bodies formed by welding a side member 19 having a U-shaped cross section to a long side plate 18 from the inner side in the left-right direction. An attachment bracket 20 for attaching to the rear axle case 47 is welded to the lower end of the lower support column 2.
After the mounting bracket 20 is arranged on the upper surface of the rear axle case 47, the mounting plate 21 is arranged on the opposite side of the mounting bracket 20 with the rear axle case 47 interposed therebetween, and both of them are connected via a fastener 22 such as a bolt. By fastening, the lower support column 2 is fixed to the vehicle body 48. In addition, since the longitudinal direction of the lower support column 2 is erected so as to be inclined rearward with respect to the mounting bracket 20, the lower support column 2 is disposed in a backward inclined posture with respect to the vehicle body 48. The lower support column 2 is also used for fixing the rear wheel fender 53, the floor sheet plate 54, and the fuel supply cap 55.
[0012]
An engagement hole 27 penetrating in the front-rear direction is provided in an upper portion of the lower support outer wall 23. Further, a check means 7 described later is provided above the engagement hole 27 and on the inner side in the left-right direction of the outer wall 23 of the lower column 2.
Furthermore, a direction indicator 43 is provided on the upper side of the lower support outer wall 23 on the outer side in the left-right direction.
On the other hand, the Lopse upper body 5 is formed in a frontal portal type by joining together a pair of bending members 3 formed by bending a hollow material having a rectangular cross section such as a square pipe at a substantially right angle at the upper part. The pair of bending members 3 are fixed to each other by inserting a connecting member 40 in the joint portion 17 and fastening the connecting member 40 and the bending member 3 with a fastener such as a bolt.
[0013]
The portal-type lops upper body 5 includes a pair of left and right upper struts 3B, which are both leg portions, and an upper side portion 3A having the splicing portion 17. The pair of left and right upper struts 3B includes a pair of left and right lower struts. The lops device 1 is configured by being inserted into the hollow interior of 2 in the longitudinal direction. When the upper column 3B expands and contracts with respect to the lower column 2, the upper body 5 moves up and down substantially vertically with respect to the lower body 4 while the lower body 5 is inclined slightly rearward. Can be changed freely.
As shown in FIGS. 3 and 4, locking holes 26A and 26B penetrating in the front-rear direction are formed at two places in the vertical direction on the outer wall 24 of the upper column 3B. A holding means 6 for positioning the upper column 3B with respect to the lower column 2 by inserting a locking pin 28 into the engagement holes 26A, 26B via the engagement holes 27 of the lower column 2 It has become.
[0014]
The holding means 6 holds the upper column 3B at two positions in the vertical direction (low position and high position) with respect to the lower column 2 by two locking holes 26A and 26B. It is also possible to fix the position only with. In that case, it is preferable that only the lower side 26B is formed in the upper support column 3B as the engagement hole.
As shown in FIG. 6, a cylindrical pin introduction body 31 is fitted in the locking holes 26A and 26B in the front-rear direction to facilitate the insertion of the locking pin 28 and the locking holes 26A and 26B. It aims to increase its own strength. Although the pin introduction body 31 slightly protrudes from the outer wall 24 of the upper column 3 </ b> B, it is fitted inside the lower column 2. Therefore, the pin introduction body 31 has a function of suppressing the rattling of the upper support column 3B, and since the contact area is small, the slide resistance of the upper support column 3B with respect to the lower support column 2 is reduced.
[0015]
The locking pin 28 has a length capable of penetrating the lower support column 2 in the front-rear direction, and has a strength capable of holding the load of the lops upper body 5. The base end portion 16 is provided with a drawing ring 29. Note that there is no problem even if a bolt is used as the locking pin 28. In this case, it is preferable to fit a nut at the tip to prevent it from coming off.
The check means 7 provided on the inner side in the left-right direction of the outer wall 23 of the lower column 2 has a configuration as shown in FIGS.
[0016]
That is, a plurality of temporary fixing holes 10 are formed at approximately equal intervals between the upper and lower two locking holes 26A, 26B on the inner side in the left-right direction of the outer wall 24 of the upper support column 3B. On the other hand, an insertion cylinder 42 is fitted on the upper side of the lower support outer wall 23 in the left-right direction, and the check pin 9 is inserted into the insertion cylinder 42.
An inclined surface 13 is formed at the tip 15 of the check pin 9 so as to intersect the pin axis, and further, formed on the upper column 3B on the opposite side of the inclined surface 13 to the pin axis. A regulating surface 14 is formed that engages with the peripheral edge 11 of the temporary fixing hole 10 and prevents the upper column 3B from moving.
[0017]
The check pin 9 is supported by a U-shaped support member 35 protruding inward in the left-right direction of the outer wall 23 of the lower support column 2 so as to be rotatable around the pin axis and urged. The member 12 is pressed against the temporary fixing hole 10 side. The urging member 12 includes a spring body 37 disposed between the support member 35 and a flange portion 36 provided in the middle of the check pin 9, and attaches the check pin 9 to the upper support 3 </ b> B side. And the check pin 9 is allowed to move away from the upper column 3B.
[0018]
The base end portion 16 of the check pin 9 protrudes inward in the left-right direction from the support member 35, and a reversing member 38 for rotating the check pin 9 about the pin axis is provided at the protruding portion. Is provided. In the portion facing the reversing member 38, a recess 41 is formed that allows the reversing member 38 to enter, thereby restricting the check pin 9 from entering the lower column 2 and positioning it.
That is, by rotating the check pin 9 by this reversing member 38 and fitting the reversing member 38 into the recess 41, the normal position (the regulating surface 14 of the tip 15 is directed upward and the inclined surface 13 is directed downward). Positioning is possible at the position of the check pin 9) and at the reverse position (position of the check pin 9 where the inclined surface 13 faces upward and the regulating surface 14 faces downward).
[0019]
Next, a usage mode of the lops device 1 for a traveling vehicle according to the present invention will be described.
As shown by a two-dot chain line in FIG. 1, there is a tractor 44 in which the upper column 3 </ b> B is inserted deeply into the lower column 2 and the height of the lops device 1 itself is lowered. At this time, the holding means 6 allows the locking pin 28 to pass through the upper locking hole 26A of the upper column 3B through the engagement hole 27 of the lower column 2 so that the position of the lops upper body 5 relative to the lower body 4 is reduced. Is fixed.
When the height of the lops device 1 of the tractor 44 is increased, the operator can release the holding means 6, that is, withdraw the locking pin 28 inserted into the upper locking hole 26 </ b> A and move the upper column 3 </ b> B up and down. The lops upper body 5 in the low position is lifted.
[0020]
At this time, since the check means 7 functions, the upper support column 3B is temporarily positioned in each temporary fixing hole 10. That is, when the lops upper body 5 is lifted, the check pin 9 at the normal position biased by the biasing member 12 is fitted into the temporary retaining hole 10 formed at the uppermost position formed in the upper column 3B. Become. Then, the regulation surface 14 and the peripheral edge 11 of the temporary fixing hole 10 are engaged with each other, and the upper support column 3B is prevented from falling, and the upper support column 3B is temporarily held in position with respect to the lower support column 2. become.
[0021]
Thereafter, when the upper support 3 </ b> B is further lifted upward, the inclined surface 13 intersecting the pin axis engages with the peripheral edge 11 of the temporary fixing hole 10, and the check pin 9 resists the urging force of the urging member 12. And then move outward. Therefore, the upper support 3 </ b> B can be lifted without being blocked by the check pin 9, and the check pin 9 is fitted into the temporary stop hole 10 below.
Thus, when the check pin 9 is fitted into the plurality of temporary fixing holes 10 in order from the top, the operator does not need to lift the lops upper body 5 from the low position to the high position at once. The lops upper body 5 can be lifted stepwise. Of course, at each stage, even if the hand is released, the lops upper body 5 does not fall downward. Therefore, no labor is required when the Lopse upper body 5 is raised.
[0022]
When the Lopse upper body 5 is lifted and reaches a high position, the engagement hole 26B formed below the upper support column 3B and the engagement hole 27 of the lower support column 2 overlap each other. Therefore, the holding pin 6 is inserted so as to penetrate the locking pin 28 in the front-rear direction, the upper support 3B is positioned, and the lops upper body 5 is securely held at a high position with respect to the lops lower body 4. Can do.
Even in this state, the temporary fixing hole 10 is formed in the upper support column 3B so that the check means 7 functions. Therefore, the locking pin 28 can be passed through the locking hole 26 </ b> B and the engaging hole 27 with the hand released.
[0023]
On the other hand, when lowering the rising lops body 5, the check pin 9 is reversed to the reverse position by using the reverse member 38 of the check pin 9. Then, the inclined surface 13 becomes upward and the regulating surface 14 becomes downward. In this state, the upper column 3 </ b> B can move downward, that is, in the direction of insertion into the lower column 2.
Then, the holding means 6 is released, and the height of the lops device 1 itself is lowered by lowering while supporting the lops upper body 5.
FIG. 7 shows a modification of the check pin 9, which is different in that the check pin 9 is bent at a substantially right angle. By operating the bent base end portion 16, the check pin distal end portion 15 can be rotated, and the check pin 9 can be freely reversed between the normal position and the reverse position. Thereby, it is not necessary to provide the reversing member 38 separately, and the number of parts of the check means 7 can be reduced.
[0024]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation can be carried out.
For example, the lower column 2 and the upper column 3B may have a substantially circular cross section.
Further, the check means 7 may be provided in the front-rear direction of the lower column outer wall 23 or may be provided on the outer side of the outer wall 23 in the left-right direction. Naturally, the temporary fixing hole 10 needs to be provided in the upper support column 3B so as to correspond to the position.
[0025]
Further, the locking pin 28 may be inserted so as to penetrate the lower support column 2 in the left-right direction. In that case, the engagement hole 27 of the lower support column 2 and the engagement holes 26A and 26B of the upper support column 3B need to be provided so that the engagement pin 28 can be inserted in the left-right direction.
[0026]
【The invention's effect】
As described above, according to the present invention, the lower body 5 can be raised and lowered in the vertical direction, and the lower body 5 can be held at least at the raised position. The change can be made easier.
[Brief description of the drawings]
FIG. 1 is a rear view of a traveling vehicle equipped with the present invention.
FIG. 2 is a side view of a traveling vehicle equipped with the present invention.
FIG. 3 is a rear view of the lops device.
FIG. 4 is a side view of the lops device.
FIG. 5 is a cross-sectional rear view of the check means.
FIG. 6 is a cross-sectional plan view of the check means.
FIG. 7 is a sectional rear view showing another example of the check means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lop device 2 Lower support | pillar 3B Upper support | pillar 4 Lops lower body 5 Lops upper body 6 Holding means 7 Checking means 9 Checking pin 10 Temporary fixing hole 11 Perimeter 12 Energizing member 13 Inclined surface

Claims (3)

A lops lower body (4) having a pair of left and right lower columns (2) erected at the rear of the traveling vehicle, and a gate type having a pair of left and right upper columns (3B) inserted in the lower column (2) so as to be movable up and down. Lops upper body (5), holding means (6) for holding the upper strut (3B) at least in a raised position, and an outer wall (23) of the lower strut (2) and the upper strut check means (7) for regulating the downward movement allow the upward movement of the upper strut (3B) when raising the (3B) and has,
The check means (7) includes a check pin (9) inserted into the outer wall (23 ) of the lower support column (2) so as to be movable in the direction of the pin axis and rotatable about the pin axis. A plurality of vertical fixing holes (10) provided in the upper column (3B) and engaged with the check pins (9), and the check pins (9) are biased toward the temporary lock holes (10). A biasing member (12),
An inclined surface (13) that engages with the peripheral edge (11) of the temporary fixing hole (10) and allows the upper column (3B) to move upward is formed at the tip of the check pin (9). At the tip of the check pin (9) opposite to the inclined surface (13), it engages with the peripheral edge (11) of the temporary fixing hole (10), and the upper support column (3B) A restricting surface (14) for restricting downward movement is formed,
The traveling vehicle rops device according to claim 1, wherein the inclined surface (13) can be reversed from upward to downward by rotating the check pin (9) around a pin axis. The holding means (6) inserts a locking pin (28) into a pair of upper and lower locking holes (26A, 26B) formed in the upper column (3B), thereby preventing the lower column (2) from being inserted. Hold the position of the upper column (3B),
The temporary fixing hole (10) includes a position where the check pin (9) is engaged when the upper support column (3B) is raised and held by the holding means (6), and an upper and lower locking hole (26A, 26. The lops device for a traveling vehicle according to claim 1, wherein the lops device is formed between 26B). The lops device for a traveling vehicle according to claim 1 or 2, wherein the check means (7) is provided on the inner side in the left-right direction of the outer wall (23) of the lower support column (2).

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