JP2011184007A - Overturning protective frame of traveling vehicle for work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a support member, by dispensing with a conventional storage-position pin hole formed in the support member. <P>SOLUTION: This overturning protective frame includes a fixed frame 8 and a movable frame 10 collapsibly connected to an upper end part of the fixed frame 8 via a connecting part 9. The connecting part 9 includes the support member 13 for collapsibly supporting the movable frame 10 via a rotary support shaft 11 and a rotation regulating pin 14 freely extracted/inserted relative to pin holes 10a, 13a and 13b formed in the movable frame 10 and the support member 13. When holding the movable frame 10 at a rising position, the rotation regulating pin 14 is inserted into the pin holes 10a and 13a of the movable frame 10 and the support member 13 mutually adjusted in a position, and when holding the movable frame 10 at a storage position, the rotation regulating pin 14 inserted into the pin hole 10a of the movable frame 10 is allowed to abut on a rear edge part 13c of the support member 13. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a fall protection frame that is erected on a working vehicle such as a tractor.

  2. Description of the Related Art In recent years, in a working vehicle such as a tractor, a fall protection frame has been erected in order to ensure safety when the aircraft falls. Since this type of fall protection frame may be a hindrance when the machine is stored or when working in an orchard, it is generally configured to be foldable at an intermediate portion in the height direction. For example, the overturn protection frame shown in Patent Document 1 includes a fixed frame that is erected on the rear side of the driver's seat, and a movable frame that is foldably connected to the upper end portion of the fixed frame via a connecting portion. It is configured.

  The connecting portion usually includes a support member that foldably supports the movable frame via a rotation support shaft, and a rotation restriction pin that can be freely inserted into and removed from a pin hole formed in the movable frame and the support member. By pulling out the rotation restricting pin, the folding operation and the unfolding operation of the movable frame are allowed.

Japanese Patent No. 3637213

  However, in the conventional fall protection frame, when the movable frame is held at the predetermined standing position or the storing position by the rotation restricting pin, the standing position pin hole and the storing position pin that match the pin hole of the movable frame at each position. Since the hole is formed in the support member, there is a problem that not only the support member becomes large but also the size management of the hole processing becomes difficult.

The present invention has been created for the purpose of solving these problems in view of the above-described circumstances, and is a fall protection frame erected on a working traveling vehicle, and is provided on the working traveling vehicle. A fixed frame that is integrally fixed; and a movable frame that is foldably connected to an upper end portion of the fixed frame via a connecting portion, and the connecting portion is configured to connect the movable frame via a rotation support shaft. When holding the movable frame in a predetermined standing position, having a support member that is foldably supported, and a rotation restricting pin that can be inserted into and removed from the pin hole formed in the movable frame and the support member. The rotation restricting pin is inserted into the pin hole of the movable frame and the support member whose positions coincide with each other, thereby restricting the rotation of the movable frame and placing the movable frame in a predetermined storage position. When holding the movable frame, the rotation of the movable frame is regulated by bringing the rotation regulating pin inserted through the pin hole of the movable frame into contact with the end edge of the support member. .
Further, the connecting portion has a stopper that contacts the movable frame at the storage position, and restricts the downward rotation of the movable frame by the contact with the stopper, while the pin is formed in the pin hole of the movable frame. The rotation of the movable frame to the upright side is restricted by contact between the inserted rotation restricting pin and the end edge of the support member.

According to the first aspect of the present invention, the conventional storage position pin hole formed in the support member becomes unnecessary while the movable frame is held at the predetermined standing position or the storage position by the rotation restricting pin. Therefore, not only can the support member be reduced in size, but also the number of holes in the support member can be reduced to facilitate processing management.
According to the second aspect of the invention, since the rotation of the movable frame in the two directions is restricted at the storage position, it is possible to prevent the movable frame from rattling at the storage position.

It is a side view of a tractor. It is a side view of a fall protection frame. It is a side view which shows the connection part of a fall protection frame. It is a side view which shows the connection part of a fall protection frame, (A) is a side view which shows the connection part of a standing holding state, (B) is a side view which shows the connection part of a horizontal holding state, (C) is a storage holding state. It is a side view which shows the connection part. It is sectional drawing which shows the connection part of a fall protection frame, (A) is sectional drawing which shows the connection part of a standing holding state, (B) is a side view which shows the connection part of a horizontal holding state, (C) is a storage holding state. It is sectional drawing which shows these connection parts.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a tractor traveling body, which includes an engine mounting portion 2 on which an engine (not shown) is mounted, a wheel-type or crawler-type traveling portion 3, a driver seat 4, and various types. The operation unit 5 in which the operation tool is arranged, the work machine mounting unit 6 on which various work machines can be selectively mounted, and the like are provided.

  As shown in FIG. 1 and FIG. 2, a fall-protection frame 7 having a front-view-shaped shape for securing a safety area at the time of the fall is erected on the rear side of the driver seat 4. The fall protection frame 7 is configured to be foldable at an intermediate portion in the height direction because it may become an obstacle when the machine body is stored or when working in the orchard. Specifically, a pair of left and right fixed frames 8 erected at the rear of the driver seat 4 and a movable frame in a front view shape that is foldably connected to the upper end of the fixed frame 8 via a connecting portion 9. 10.

  As shown in FIGS. 3 to 5, the connecting portion 9 is provided with a rotation support shaft 11 provided at the lower end portion of the movable frame 10 in the left-right direction via the base plate 12 at the upper end portion of the fixed frame 8. It is configured to be supported by a U-shaped support member 13 that can be rotated in the front-rear direction, and can be freely inserted into and removed from the pin holes 10a, 13a, and 13b formed in the movable frame 10 and the support member 13. A rotation restricting pin 14 is provided.

  The movable frame 10 of the present embodiment can be held at three positions, that is, a standing position, a horizontal position, and a storage position by replacing the rotation restricting pin 14. The standing position is a position for securing a safety area at the time of falling, and the horizontal position and the storage position are positions for suppressing the height when storing the body or working in the orchard. The horizontal position is a position where the height of the working machine (attachment) and the movable frame 10 can be avoided while suppressing the height when the machine body is stored or when working in the orchard.

  The support member 13 is provided with a standing position pin hole 13a and a horizontal position pin hole 13b as pin holes 13a and 13b through which the rotation restricting pin 14 can be inserted. In other words, when the movable frame 10 is held at a predetermined standing position, the rotation restricting pin 14 is inserted into the pin hole 10a of the movable frame 10 and the pin hole 13a for the standing position of the support member 13 that are matched with each other. When the movable frame 10 is restricted from rotating (see FIGS. 4A and 5A) and the movable frame 10 is held at a predetermined horizontal position, the pins of the movable frames whose positions match each other. The rotation of the movable frame 10 is restricted by inserting the rotation restricting pin 14 through the hole 10a and the horizontal position pin hole 13b of the support member 13 (see FIGS. 4B and 5). (See (B)).

  On the other hand, when the movable frame 10 is held in a predetermined storage position, the rotation restriction pin 14 inserted through the pin hole 10a of the movable frame 10 is brought into contact with the rear end edge portion 13c of the support member 13 so as to be movable. The rotation of the frame 10 is restricted (see FIG. 4C and FIG. 5C). That is, the conventional storage position pin hole formed in the support member 13 is not required while the movable frame 10 is held at a predetermined standing position or storage position by the rotation restricting pin 14. Thereby, not only the support member 13 can be downsized, but also the number of holes in the support member 13 can be reduced to facilitate processing management.

  When the rotation of the movable frame 10 is restricted by the contact between the rotation restricting pin 14 and the rear end edge 13c of the support member 13, the rear end edge 13c of the support member 13 is movable as shown in FIG. The shape is set so as to intersect the movement locus of the pin hole 10a accompanying the rotation of the frame 10. For example, in the present embodiment, the rear end edge 13c of the support member 13 is an inclined surface that recedes toward the upper side, and the rotation of the movable frame 10 to the upright side is reliably restricted.

  Further, the connecting portion 9 of the present embodiment has a storage position stopper 15 that contacts the movable frame 10 at the storage position, and the contact with the storage position stopper 15 restricts the downward rotation of the movable frame 10. It is supposed to be. For example, in this embodiment, the storage position stopper 15 is configured by an elastic member having a U-shaped cross section that is attached to the rear end portion of the base plate 12 in a fitting manner. If such a storage position stopper 15 is provided, the two-way rotation of the movable frame 10 is restricted at the storage position, so that rattling of the movable frame 10 at the storage position can be prevented.

  Further, the connecting portion 9 of the present embodiment includes an upright position stopper 16 that is in contact with the movable frame 10 in the upright position and that can adjust the front and rear positions to restrict the forward rotation of the movable frame 10. The standing position stopper 16 facilitates the alignment of the pin hole 10a of the movable frame 10 and the standing position pin hole 13a of the support member 13, and between the rotation restricting pin 14 and the pin holes 10a, 13a. It can absorb rattling.

  According to the present embodiment configured as described above, the fall protection frame 7 is erected on the traveling machine body 1 of the tractor, and is fixed to the traveling machine body 1. A movable frame 10 that is foldably connected to the upper end portion via a connecting portion 9 is provided. The connecting portion 9 is movable with a support member 13 that foldably supports the movable frame 10 via a rotation support shaft 11. When the movable frame 10 is held in a predetermined standing position, the frame 10 and the pin hole 10a, 13a, 13b formed in the frame 10 and the support member 13 have a rotation restricting pin 14 that can be freely inserted and removed. The rotation restriction pin 14 is inserted into the movable frame 10 and the pin holes 10a, 13a of the support member 13 with which the When holding in the retracted position, the rotation of the movable frame 10 is regulated by bringing the rotation regulating pin 14 inserted through the pin hole 10a of the movable frame 10 into contact with the rear end edge 13c of the support member 13. Therefore, while the movable frame 10 is held at the predetermined standing position or the storage position by the rotation restricting pin 14, the conventional storage position pin hole formed in the support member 13 becomes unnecessary, and as a result, the support Not only can the member 13 be reduced in size, but also the number of holes in the support member 13 can be reduced to facilitate processing management.

  The connecting portion 9 has a storage position stopper 15 that contacts the movable frame 10 at the storage position, and restricts the downward rotation of the movable frame 10 by contact with the storage position stopper 15, while being movable. Since the rotation of the movable frame 10 to the upright side is restricted by the contact between the rotation restricting pin 14 inserted through the pin hole 10a of the frame 10 and the rear end edge 13c of the support member 13, the movable frame 10 is movable at the storage position. The rotation of the frame 10 in two directions can be restricted, and rattling of the movable frame 10 at the storage position can be prevented.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 4 Driver's seat 5 Steering part 7 Fall protection frame 8 Fixed frame 9 Connection part 10 Movable frame 10a Pin hole 11 Rotating spindle 12 Base plate 13 Support member 13a Standing position pin hole 13b Horizontal position pin hole 13c Rear End edge portion 14 Rotation restriction pin 15 Storage position stopper 16 Standing position stopper

Claims (2)

A fall protection frame standing on a work vehicle,
A fixed frame fixed integrally to the working vehicle;
A movable frame that is foldably connected to the upper end of the fixed frame via a connecting portion;
The connecting portion is
A support member that foldably supports the movable frame via a rotating support shaft;
A rotation restricting pin that can be freely inserted into and removed from a pin hole formed in the movable frame and the support member;
When the movable frame is held at a predetermined standing position, the rotation of the movable frame is restricted by inserting the rotation restriction pin through the pin hole of the movable frame and the support member whose positions match each other. ,
When the movable frame is held at a predetermined storage position, the movable frame is rotated by bringing the rotation restricting pin inserted into the pin hole of the movable frame into contact with the edge of the support member. A fall protection frame for a work vehicle characterized by restricting. The connecting portion is
While having a stopper that comes into contact with the movable frame at the storage position, the contact with the stopper regulates the downward rotation of the movable frame,
The rotation of the movable frame to the upright side is regulated by abutment between the rotation regulating pin inserted through the pin hole of the movable frame and an end edge portion of the support member. Fall protection frame for working vehicles.

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