JP4467943B2 - Roll grab - Google Patents

Description

  The present invention relates to a roll grab that is one of attachments of a front loader attached to a front portion of a tractor that performs farm work or the like.

  As shown in FIG. 7, a roll grab 100 is a dry roll in which dried grass is wound into a roll, or a wrapping roll 101 (roll silage) in which grass that has not been sufficiently dried is wound in a roll and wrapped with vinyl or the like. This is a tip attachment for the front loader 102 suitable for carrying, loading and unloading.

  The storage of both the drying rolls and the wrapping rolls is stacked. The narrower the gap between the rolls, the better because of space restrictions. The second and third rolls are stacked on the first roll placed neatly on the ground. To go.

In general, as shown in FIG. 8, the roll grab 100 has curved arms 104, 105 disposed on the left and right sides of a base 103 attached to a front loader 102, and both arms 104, 105 are opened and closed by a hydraulic cylinder 106. Thus, the object to be conveyed such as the wrapping roll 101 is nipped and conveyed. The hydraulic cylinder 106 that opens and closes the arms 104 and 105 of the roll grab 100 is, for example, a hydraulic circuit that branches to the hydraulic circuit of a hydraulic cylinder for lifting and lowering a lift arm or a hydraulic cylinder that rotates a hitch up and down via an oil path switching valve. Connected to. The roll grab 100 is detachably attached to the front loader 102, and the tip attachment for another front loader 102 such as a bucket or a fork can be replaced depending on the application (for example, , See Patent Document 1).
JP2000-170198A

  Since the wrapping roll 101 is just wrapped with grass and wrapped with vinyl or the like, the vinyl will be torn if it is strongly clamped with the roll grab 100. Since the wrapping roll 101 (roll silage) wraps grass with vinyl and ferments it to increase the nutritional value of the grass, it is not preferable that the vinyl breaks.

  For this reason, the wrapping roll 101 cannot be strongly clamped by the roll grab 100, and normally, as shown in FIG. 9, a gap is generated at the front end a or the rear end b of the arms 104, 105 of the roll grab 100, The area on which the roll grab 100 is hit is small. For this reason, a large force is easily applied locally to the wrapping roll 101, which causes the wrapping roll 101 to slip or the wrapping roll 101 to break.

  Further, when the wrapping roll 101 is stacked or unloaded, the roll grab 100 is overlapped with the tractor 108 or the front loader 102 for an operator riding on the tractor 108 (see FIG. 7). Is hard to understand. For this reason, the roll grab 100 may hit the adjacent wrapping roll 101 and damage the wrapping roll 101 in some cases. In addition, since the opening degree of the roll grab 100 is difficult to understand, the working efficiency is not good.

  Further, since the wrapping rolls 101 are stacked almost without any gaps, it is difficult to operate the roll grab 100 so that it does not hit the adjacent wrapping rolls 101 when the wrapping rolls 101 are stacked or unloaded. In particular, when the wrapping rolls 101 are stacked, the roll grab 100 can be adjusted in the front-rear direction by moving the tractor 108 forward, but the operation for adjusting the position of the roll grab 100 in the lateral direction can be performed only by moving the tractor 108 forward and backward. It is difficult to do.

  In view of such a situation, an object of the present invention is to provide a roll grab that can prevent a wrapping roll from being damaged.

A roll grab according to the present invention includes a base attached to a front loader, left and right curved arms rotatably attached to the base, and a first cylinder that rotates the left and right arms, respectively. The base includes a rear member attached to the front loader, a front member to which the left and right arms are rotatably attached, a slide mechanism that slides the front member left and right with respect to the rear member, And a second cylinder that slides the front member along a slide mechanism . This role Grab or stacking the wrapping rolls, in work or unloading, the base is left, right, and laterally slide mechanism for sliding in a cylinder for moving the base along the slide mechanism in the lateral transverse direction of the roll grab arm The position can be adjusted to the left and right, improving the operability of the roll grab for the operator and preventing the roll grab from hitting the wrapping roll adjacent to the wrapping roll to be held and damaging the wrapping roll. can do.

In the above-described roll grab according to the present invention, when the wrapping roll is clamped by the arm, the grip extending in the longitudinal direction to the front end portion and the rear end portion of the arm so that the front end portion and the rear end portion of the arm hit the wrapping roll. A member may be provided. Thereby, when pinching a wrapping roll, since the area which a roll grab hits can be enlarged, the force concerning a wrapping roll can be relieve | moderated and it can prevent that a wrapping roll is damaged.
In the case of the present invention provided with a gripping member, if the gripping member extends upward from the arm, the lower wrapping roll is transported when two wrapping rolls are stacked one above the other. Since the upper wrapping roll can be supported by the gripping member, the two wrapping rolls can be transported at a time. Further, the gripping member extending upward from the arm can also serve as a display unit that notifies the operator of the degree of opening of the arm. Moreover, it is preferable that the gripping member to be hung is detachably attached to the arm so that the roll grab can be used for various purposes other than holding the wrapping roll.

  A roll grab according to another embodiment of the present invention is characterized in that a display unit for notifying an operator of the degree of opening of the arm is attached to the arm. Thereby, since the operator can estimate the opening degree of an arm more correctly, the operativity of the roll grab in an operator can improve, and it can prevent that a lapping roll hits a lapping roll and a wrapping roll is damaged. Such a display unit may be detachably attached to the arm so that the roll grab can be used for various purposes.

The roll grab of the present invention preferably has a structure including a sensor for detecting the degree of opening of the arm, and an indicator for receiving the signal of the sensor and notifying the operator of the degree of opening of the arm . As a result, the operator can grasp the degree of opening of the arm more accurately, improving the operability of the roll grab for the operator, and the roll grab hits the wrapping roll adjacent to the wrapping roll to be held, and the wrapping is performed. It is possible to prevent the roll from being damaged.

Further, the roll grab of the present invention is preferably structured such that the hydraulic cylinder is provided with a speed reduction mechanism so that the opening speed of the arm is slow when the arm is opened by a predetermined angle or more . This roll grab reduces the speed of the arm in a predetermined angle region when the arm is open, thereby improving the operability of the roll grab for the operator and holding the wrapping roll without opening the roll grab more than necessary. be able to. Therefore, when clamping the wrapping rolls, roll grab, when wrapping rolls adjacent to the wrapping rolls to be sandwiched, it is possible to prevent the the wrapping roll is damaged.

According to the roll grab according to the present invention, when the wrapping roll is sandwiched, the area hit by the roll grab is increased, so that the force applied to the wrapping roll can be reduced, and the roll grab of the operator can be reduced. Since the operability is improved, it is possible to prevent the wrapping roll adjacent to the wrapping roll to be sandwiched from being damaged.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to the member or site | part which has the same effect | action.

  As shown in FIG. 1, a roll grab 1 according to an embodiment of the present invention includes a base 2, left and right arms 3, 4 pivotally supported on the base 2, and tips and rears of the arms 3, 4. The gripping member 5 attached to the end, the first cylinders 6 and 7 for rotating the left and right arms 3 and 4, the slide mechanism 8 for sliding the base 2 to the left and right, and the base 2 along the slide mechanism 8 And a second cylinder 9 to be slid.

  As shown in FIGS. 2A and 2B, the base 2 is a substantially rectangular member, and a front member 11 to which the arms 3 and 4 are attached, and a rear member 12 to be attached to the front loader 102 (see FIG. 7). It consists of and. A slide mechanism 8 described later is provided between the front member 11 and the rear member 12 of the base 2, and the front member 11 of the base 2 slides left and right with respect to the rear member 12. It is supposed to be.

  The left and right arms 3 and 4 attached to the front member 11 of the base 2 are curved members having a center of curvature on the inner side facing each other, and are attached to a rotating shaft 2a provided at a slightly inner part from the end of the base 2. It is pivotably attached. A round bar or a gripping member 5 having a shape equivalent thereto is detachably attached to the front and rear ends of the arms 3 and 4. The gripping members 5 at the front and rear ends of the arms 3 and 4 come into contact with the wrapping roll 101 when the wrapping roll 101 is sandwiched between the left and right arms 3 and 4, respectively. As shown in FIG. 3, the gripping member 5 has a length that allows the upper end to extend slightly above the upper surface of the wrapping roll 101 when the wrapping roll 101 is sandwiched between the left and right arms 3 and 4. Yes.

  The first cylinders 6 and 7 for rotating the left and right arms 3 and 4 are attached between both end portions 2 b and 2 b of the base 2 and the outer surfaces 3 a and 4 a of the arms 3 and 4, respectively. When the first cylinders 6 and 7 are extended, the left and right arms 3 and 4 are closed, and when the first cylinders 6 and 7 are contracted, the left and right arms 3 and 4 are opened.

  As shown in FIGS. 2A and 2B, the slide mechanism 8 that slides the base 2 to the left and right is provided with a guide rail 13 on the member 12 on the rear side of the base 2 to which the front loader 102 is attached. The member 11 is attached so as to slide along the guide rail 13. The second cylinder 9 that slides the base 2 to the left and right along the slide mechanism 8 is attached between the rear member 12 of the base 2 and the front member 11 of the base 2. By extending and contracting the second cylinder 9, the member 11 on the front side of the base 2 can be slid left and right along the slide mechanism 8 with respect to the member 12 on the rear side of the base 2 attached to the front loader 102. .

  The roll grab 1 has a gripping member 5 in the height direction of the wrapping roll 101 at the front and rear ends of the arms 3 and 4 when the wrapping roll 101 is sandwiched between the arms 3 and 4. The area hitting 101 is wide. When the roll grab 1 sandwiches the wrapping roll 101, the portion 14 where the arms 3 and 4 abut against the wrapping roll 101 is as shown in FIG. 4, the circumferential direction (14 a) of the wrapping roll 101 and the height direction The arms 3 and 4 and the gripping member 5 hit (14b). Thereby, since the area which hits the wrapping roll 101 is larger than before and the force applied to the wrapping roll 101 can be relieved locally, the wrapping roll 101 can be prevented from being damaged.

  Further, as shown in FIG. 3, the gripping member 5 has a length that extends slightly above the upper surface of the wrapping roll 101, so that the wrapping roll 101 below the wrapping roll 101 that is stacked up and down is provided. Is held by the arms 3 and 4, the upper wrapping roll 101 can be supported by the portion of the gripping member 5 that extends upward from the upper surface of the wrapping roll 101. Thereby, when carrying the lapping roll 101 piled up and down, two lapping rolls 101 can be clamped and conveyed at once. Although not shown in the drawings, when two wrapping rolls 101 are sandwiched and transported at a time, the upper side of the lower wrapping roll 101 is usually sandwiched slightly more than when one wrapping roll 101 is sandwiched. That's fine. Thereby, since the holding member 5 extends further upward from the upper surface of the lower wrapping roll 101, the two wrapping rolls 101 can be held in a more stable state.

In addition, since the grip member 5 has a portion 5a extending above the arms 3 and 4 that can be visually recognized by an operator riding on the tractor, the operator can open the arms 3 and 4 of the roll grab 1. I can grasp it. As a result, the operability of the roll grab 1 is improved. For example, when the wrapping roll 101 is stacked or unloaded, the roll grab 1 hits the wrapping roll 101 adjacent to the wrapping roll 101 to be sandwiched, and the wrapping is performed. The roll 101 is not damaged.

  In addition, since the gripping member 5 is detachably attached to the arms 3 and 4, and the gripping member 5 can be used in the work, the gripping member 5 can be removed and used. There is no hindrance to its application.

In addition, since the roll grab 1 has a slide mechanism 8 that slides the base portion 2 to the left and right, the position of the roll grab 1 can be moved without moving the tractor in the operation of stacking or unloading the wrapping roll 101. It can be finely adjusted to the left and right according to the position 101 This improves the operability of the roll glove 1, roll grab 1, hit the wrapping roll 101 adjacent to the wrapping roll 101 to be sandwiched, it is not that would injure the wrapping roll 101.

  Next, other structures that improve the operability of the roll grab will be described.

  For example, although not shown, a display unit (display pole) may be attached to the arms 3 and 4 so that the operator can grasp the degree of opening of the arms 3 and 4 while riding the tractor. Such a display unit (display pole) is easy to be seen by an operator on the tractor and may be attached to any position of the arms 3 and 4 that do not interfere with the wrapping roll. For example, the arms 3 and 4 It is good to attach so that it may extend to the front-end | tip of. The display unit (display pole) may be detachably attached to the arms 3 and 4 so that the diversity of the roll grab 1 is not impaired.

  Moreover, it replaces with the display part mentioned above, and the sensor which detects the opening degree of the arms 3 and 4 as a structure which notifies the operator who got on the tractor about the opening degree of the arms 3 and 4 of the roll grab 1, and the signal of a sensor You may provide the indicator which receives and notifies an operator how the arms 3 and 4 open.

  For example, as shown in FIGS. 5 (a) and 5 (b), bars 31 and 32 that move to the left and right in conjunction with the opening and closing of the left and right arms 3 and 4 are attached to the base 2, and the bar 31 that is linked to one arm 3. The sensor 33 is attached to the base 32, and the proximity switch 34 for detecting the proximity state of the sensor 33 is attached to the bar 32 interlocked with the other arm 4, and the patrol light 35 that is turned on in response to the signal from the proximity switch 34 is attached to the base 2. .

According to this configuration, when the arms 3 and 4 are opened at a predetermined angle, the roll grab 21 detects the sensor 33 by the proximity switch 34 attached to the bars 31 and 32 interlocked with the arms 3 and 4, and the patrol 35 Illuminates and informs the operator that the arms 3, 4 are open to a predetermined angle. Thereby, since the operator can grasp | ascertain the opening condition of the arms 3 and 4 more correctly, the operativity of the roll grab 21 in an operator improves, and the roll grab 21 adjoins the wrapping roll 101 which is going to pinch. against the wrapping roll 101, it is possible to prevent the the wrapping roll 101 is broken.

  In this embodiment, by adjusting the relative positional relationship between the sensor 33 attached to the bars 31 and 32 and the proximity switch 34, the timing at which the patrol light 35 lights up with respect to the degree of opening of the arms 3 and 4 is adjusted. Can do.

  Although not shown in the drawing, sensors are attached to both bars 31 and 32 that are linked to the left and right arms 3 and 4 respectively, and a proximity switch is attached to the base, so that each of the left and right arms 3 and 4 is attached. The degree of opening can be detected. In this case, it is preferable to provide two patrol lights so that the left and right arms 3 and 4 are lit in response to the degree of opening of the left and right arms 3 and 4 so as to be lit in response to signals from the left and right proximity switches 34. The indicator for notifying the operator of the degree of opening of the arms 3 and 4 is not limited to the patrol light, and a known indicator such as an alarm for notifying the operator of the degree of opening of the arms 3 and 4 by sound can be used.

  The roll grab 1 may be provided with a speed reduction mechanism in the first cylinders 6 and 7 so that the speed of the arms 3 and 4 is reduced in a predetermined angle region in a state where the arms 3 and 4 are opened.

  For example, the first cylinders 6 and 7 for rotating the left and right arms 3 and 4 respectively include a cylinder body 41, a piston 42, and a piston rod 43, as shown in FIG. When the lengths 6 and 7 are extended, the roll grab 1 is closed, and when the first cylinders 6 and 7 are contracted, the roll grab 1 is opened. In FIG. 6, reference numeral 44 denotes a connecting portion for connecting the first cylinders 6 and 7 to the base 2, and 45 is attached to the cylinder body 41, and seals oil in the cylinder body 41 against sliding of the piston rod 43. Reference numeral 46 denotes a connecting member for connecting the piston rod 43 to the arms 3 and 4.

  In the cylinder body 41 of the first cylinders 6 and 7, oil is injected into and extracted from the tip of the cylinder body 41, the rear end of the cylinder body 41, and a position slightly closer to the tip than the rear end of the cylinder body 41, respectively. Holes 47, 48 and 49 are provided. The hole 47 provided at the tip of the cylinder body 41 and the hole 49 provided at a position slightly closer to the tip than the rear end of the cylinder body 41 have a larger diameter than the hole 48 provided at the rear end of the cylinder body 41, and unit time More oil can be injected and extracted.

  According to the first cylinders 6 and 7, when the roll grab 1 is opened from the state in which the roll grab 1 is closed, the piston 42 is inserted into the hole 49 provided at a position slightly closer to the tip than the rear end of the cylinder body 41. Until it reaches, oil is extracted from both the hole 49 provided at a position slightly closer to the tip than the rear end of the cylinder body 41 and the hole 48 provided at the rear end of the cylinder body 41. 4 opens quickly. On the other hand, after the piston 42 reaches the hole 49 provided at a position slightly closer to the tip than the rear end of the cylinder body 41, oil is extracted only from the hole 48 provided at the rear end of the cylinder body 41. Therefore, the opening speed of the arms 3 and 4 becomes slow.

As a result, when the arms 3 and 4 are opened at a predetermined angle or more, the speed of the arms 3 and 4 is reduced, so that the operability of the roller grab 1 for the operator is improved, and the roll grab 1 rolls more than necessary. The wrapping roll 101 can be held without opening the grab 1. Therefore, when clamping the wrapping roll 101, rolls glove 1, against the wrapping roll 101 adjacent to the wrapping roll 101 to be sandwiched, it is possible to prevent the the wrapping roll 101 is broken.

  In addition, by providing a connecting portion 46 for connecting the tip of the piston rod 43 and the arms 3 and 4 so that the position of the piston rod 43 can be adjusted by the bolt 50, the opening speed of the arms 3 and 4 is delayed. Can be adjusted.

  As mentioned above, although embodiment of the roll grab 1 which concerns on this invention was described, the roll grab of this invention is not limited to above-described embodiment, In the range which does not deviate from the summary of this invention, various changes are carried out. Of course, it can be added.

The top view of the roll grab which concerns on 1st Embodiment of this invention. (A) (b) is a top view which shows the slide mechanism of the roll grab shown in FIG. 1, respectively. The right view of the roll grab shown in FIG. The side view of the wrapping roll which shows the part which an arm contacts a wrapping roll when the roll grab which concerns on 1st Embodiment clamps the wrapping roll. (A) is a top view which shows the structure notified to the operator of the arm opening condition using a sensor, (b) is a rear view of the base part of a roll grab. It is a partial cross-sectional side view which shows the modification of a 1st cylinder. The side view which shows the whole structure of the tractor which attached the roll grab. The perspective view which shows the conventional roll grab. The top view which shows the state which the conventional roll grab clamped the wrapping roll.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll grab 2b Both ends 2a Rotating shaft 2 Base 3, 4 Arm 5 Holding member 6, 7 Cylinder 8 Slide mechanism 9 Cylinder 13 Guide rail 31 Bar 33 Sensor 34 Proximity switch 35 Patrite 41 Cylinder main body 42 Piston 43 Piston rod 46 Connection Part 101 Wrapping roll 102 Front loader 108 Tractor

Claims (7)

Comprising a base portion attached to the front loader, the arm was bent left and right pivotally mounted to the base portion, and a first cylinder for each rotation the left and right arm,
The base includes a rear member attached to the front loader, a front member to which the left and right arms are rotatably attached, a slide mechanism that slides the front member to the left and right with respect to the rear member, A roll grab comprising: a second cylinder that slides the front member along the slide mechanism . The grip member extended in the vertical direction was provided in the front-end | tip part and rear-end part of the arm so that the front-end | tip part and rear-end part of an arm might hit a wrapping roll when the wrapping roll was clamped with the said arm. The described roll grab. Roll Grab according to claim 2 which extends upwardly to the gripping member from the arm. The roll grab as described in any one of Claims 1-3 which attached the display part which notifies an operator of the opening condition of the said arm to the arm. The roll grab as described in any one of Claims 1-3 provided with the sensor which detects the opening degree of the said arm, and the indicator which receives the signal of the said sensor and notifies an operator of the opening degree of an arm.   The front member to which the arm of the base attached to the front loader is attached includes a bar that is linked to one arm and the sensor is attached, and a proximity switch that is linked to the other arm and detects the proximity state of the sensor. The roll grab according to claim 5, comprising: an attached bar; and the indicator that receives a signal from the proximity switch and informs an operator of the degree of opening of the arm. The roll grab according to any one of claims 1 to 6 , wherein the first cylinder includes a speed reduction mechanism so that a speed at which the arm opens when the arm opens more than a predetermined angle is slow.

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