JP2011019458A - Twig cutting scissors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch cutter that can cut a thick branch or a hard branch with good sharpness and can be reduced in weight.
A fixed blade 6 of a flange 3 is provided at an upper end portion of a fixed connection portion 2, a fixed frame 19 (fixed handle 4) is provided at a lower end portion of the fixed connection portion 2, and a first pivot portion is provided on the fixed frame 19. A movable frame 18 (movable handle 5) provided so as to be able to swing through 8 is operated to swing with respect to the fixed handle 4, whereby the movable blade 7 of the flange 3 connected to the movable frame 18 is fixed. 6, the movable frame 18 is provided with a second pivotal support portion 9, and the movable frame 18 and the movable blade 7 of the rod 3 are connected to each other via the second pivotal support portion 9. The fixed frame 19 has a side wall shaped so that when the movable handle 5 is swung, the second pivotal support portion 9 is swung around the first pivotal support portion 8 and further expands to the outer side of the swing radius position. A portion 22 is formed.
[Selection] Figure 1

Description

  The present invention relates to a pruning shears that can be used, for example, for pruning raw trees.

  As an example of the above-mentioned pruning shears, there are those shown in FIGS. 7 to 9 (see, for example, Patent Document 1). As shown in FIG. 7, the branch cutting bar 1 is provided with a bar 3 that can be opened and closed at the upper end of a long fixed connecting part 2 (fixed connecting pipe). A fixed handle 4 and a movable handle 5 for opening and closing the rod 3 are provided at the lower end of the fixed connecting portion 2.

  That is, as shown in FIG. 8, the rod 3 has a fixed blade 6 and a movable blade 7, and the fixed blade 6 is provided at the upper end portion of the fixed connecting portion 2, and the movable blade 7 is connected to the fixed blade 6. On the other hand, it is provided so as to be swingable via the third pivotal support portion 10. Further, the end portion of the movable blade 7 is connected to the upper end portion of the movable connecting portion (movable connecting rod) 12 through the fourth pivotal support portion 11 so as to be swingable, and the lower end portion of the movable connecting portion 12 is the second end portion. The movable frame 13 is connected to the movable frame 13 through the pivotal support 9 so as to be swingable. The movable frame 13 is provided at the end of the movable handle 5.

  According to the branch cutting rod 1 configured as described above, the operator holds the fixed handle 4 and the movable handle 5 with their respective left and right hands, and opens and closes the movable handle 5 around the first pivot 8. By swinging and moving, the cage 3 can be opened and closed. Thus, the high branch 14 can be cut off by opening and closing the basket 3.

  Next, with reference to FIG. 8 and FIG. 9, the force that acts on each part when the branches 14 of the living tree are cut using the branch cutting rod 1 will be described. As shown in FIG. 8, force F <b> 1 (applies to the movable handle 5) in the direction in which the movable handle 5 is closed with respect to the fixed handle 4 with the branch 14 being sandwiched between the movable blade 7 and the fixed blade 6 of the heel 3. Force) and F2 (force applied to the fixed handle 4), the force based on the force F2 is applied to the fixed frame 15 attached to the base end of the fixed handle 4 according to the principle of the lever. F3 and force F4 are applied.

  That is, when the movable handle 5 shown in FIG. 8 is considered to rotate with the force of F1 with the first pivotal support 8 as a fulcrum, the second pivotal support 9 becomes an action point, and the force applied to the second pivotal support 9 is The fixed frame 15 coupled to the fixed connecting portion 2 is pressed downward with a force F3 along the movable connecting portion 12, the movable blade 7, the fixed blade 6 and the fixed connecting portion 2 of the flange 3. Further, if the movable handle 5 is considered to rotate with the force of F1 with the second pivot 9 as a fulcrum, the first pivot 8 becomes the point of action, and the force F4 applied to the first pivot 8 causes the fixed frame 15 to move. Press. As a result, the fixed frame 15 is pressed in the direction in which the first pivotal support portion 8 is bent outwardly with the force of F4 in a direction in which the both sides of the fixed frame 15 are bent with reference to the first pivotal support portion 8. And the force of F3 works.

  Thus, as shown in FIG. 8 and FIG. 9, since the force based on (force F1), F2, force F3, and force in the bending direction due to force F4 acts on the fixed frame 15, this bending force The fixed frame 15 is made of metal so that it can withstand.

JP-A-7-303424

  However, in the conventional branch cutter 1 shown in FIG. 8, if the thick branch 14 or the hard branch 14 is to be cut with the hook 3, even if the movable handle 5 is operated in the closing direction with respect to the fixed handle 4, 3 may become difficult to move in the closing direction, and as a result, the branch 14 may not be cut with good sharpness.

  The reason is that when the thick branch 14 or the hard branch 14 is cut with the scissors 3, an extremely large bending force (force based on the force F2, force F3, and force F4) acts on the fixed frame 15, and this The fixed frame 15 may bend in the bending direction due to the bending force. As described above, when the fixed frame 15 is bent in the bending direction, even if the movable handle 5 is swung in the closing direction with respect to the fixed handle 4, the operation amount is absorbed by the bending of the fixed frame 15. This is because the movable blade 7 does not move reliably in the closing direction.

  Therefore, the conventional pruning shears 1 may not be able to efficiently perform the pruning work of raw trees.

  Therefore, in order to prevent the fixed frame 15 from being bent, it is conceivable to increase the thickness of the fixed frame 15 or to provide ribs on the fixed frame 15. The weight increases, and the increase in weight becomes a burden on the operator. Even if the thickness of the fixed frame 15 is increased or ribs are provided on the fixed frame 15, the bending of the fixed frame 15 cannot be effectively prevented.

  Further, in the conventional branch cutter 1 shown in FIG. 9, the second pivotal support portion 9 that connects the movable frame 13 and the movable connection portion 12 is arranged and exposed outside the fixed frame 15. If wood chips or the like are caught in the second pivot 9, it becomes difficult to operate the movable handle 5 in the opening / closing direction with respect to the fixed handle 4, and this also prevents efficient pruning of raw wood. There is.

  The present invention has been made to solve the above-described problems, and can cut a thick branch or a hard branch with good sharpness, reduce the weight, and can be moved during a pruning operation. It is an object of the present invention to provide a branch cutting rod that prevents the swinging operation of the operation unit with respect to the fixed operation unit from being hindered by wood chips or the like.

  The branch cutting scissors according to the first aspect of the present invention are provided with a scissors-fixing blade at one end of the fixed connecting portion, a fixing operation portion at the other end of the fixed connecting portion, and a first pivot on the fixed operating portion. By swinging a movable operation part provided so as to be swingable via a support unit with respect to the fixed operation part, the movable blade of the rod connected to the movable operation part is moved with respect to the fixed blade. In the branch cutter which can be opened and closed, the movable operation part is provided with a second pivot part, and the movable operation part and the movable blade of the basket are connected to each other via the second pivot part. The fixed operating portion has a shape that expands further to the outer side of the swinging radius position where the second pivotal support swings about the first pivotal support when the movable operation part is swung. A side wall is formed.

  According to the branch cutting scissors according to the first aspect of the present invention, the operator can move the scissors connected to the movable operation part by swinging the movable operation part with respect to the fixed operation part about the first pivotal support part. The blade can be opened and closed with respect to the fixed blade. In this way, tree branches can be cut off. Then, in a state where the branch is sandwiched between the movable blade and the fixed blade of the scissors, the force F1 (force applied to the movable operation portion) and F2 (the force applied to the fixed operation portion) in the direction to close the movable operation portion with respect to the fixed operation portion. When a force to be applied is applied, forces F2, F3, and F4 are applied to the fixed operation portion according to the principle of “lever”.

  That is, assuming that the movable operation part rotates with the force of F1 with the first pivot part as a fulcrum, the second pivot part becomes the point of action, and the force applied to the second pivot part is the movable blade and fixed blade of the rod. And the fixed operation part which is transmitted to the fixed connection part and is coupled to the fixed connection part is pressed with the force F3. Further, assuming that the movable operation part rotates with the force of F1 with the second pivot part as a fulcrum, the first pivot part becomes an action point, and the force F4 applied to the first pivot part presses the fixed operation part. As a result, the fixed operation portion is pressed in the direction of F2 and F3 in the direction in which the first pivot portion is bent outwardly with respect to the first pivot portion while the first pivot portion is pressed outward by the force F4. The power of work.

  At this time, the compressive force acts on the side wall portion formed in the fixed operation portion, and the bending force can be prevented from acting on the portion where the first pivotal support portion of the fixed operation portion is provided and the vicinity thereof. . As a result, the rigidity of the portion where the first pivotal support portion of the fixed operation portion is provided and the vicinity thereof can be increased, and the portion can be bent in the bending direction by the forces of (F1), F2, F3, and F4. Can be suppressed.

  In short, if a compressive force is applied to the side wall portion, the first portion of the fixed operation portion is made of less material than when the bending force acts on the portion where the first pivotal support portion of the fixed operation portion is provided. The rigidity with respect to the bending direction of the part provided with one pivot part can be enlarged.

  According to a second aspect of the present invention, in the first aspect, the fixing operation portion includes a fixed handle and a fixed frame coupled to an end of the fixed handle, and the fixed connection is fixed to the fixed frame. One end portion of the movable portion is coupled, the movable operation portion has a movable handle and a movable frame coupled to the end portion of the movable handle, and the movable frame is connected to the fixed frame via the first pivot portion. The movable connecting portion is connected to one end portion of the movable connecting portion via the second pivot portion, and the other end portion of the movable connecting portion is connected to the movable blade of the scissors. Is.

  In the branch cutting rod according to the second invention, the operator holds the fixed handle and the movable handle with the left and right hands, and swings the movable handle with respect to the fixed handle with the first pivot portion as the center. By doing so, the tree branches can be cut off with a scissors. And since the 1st pivot part is provided with respect to a movable frame and a fixed frame, and the 2nd pivot part is provided in the movable frame, these 1st and 2nd frames can be formed with a material with large rigidity. In addition, the other fixed handle, movable handle, fixed connecting portion, and movable connecting portion can be formed of a lightweight material having a necessary strength. As a result, the cutting ability for cutting the branch with the scissors can be increased, and the weight of the branch scissors can be reduced.

  According to a third aspect of the present invention, in the first aspect, the fixed operation portion includes a fixed lever, the movable operation portion includes a movable lever, and the fixed lever and the movable lever. Is characterized by being operated by grasping with a hand.

  According to the branch cutting scissors according to the third aspect of the invention, the operator can cut the tree branches with scissors by manually tightening or loosening the fixed lever and the movable lever.

  According to a fourth aspect of the present invention, in the first to third aspects of the invention, the second pivotal portion swings around the first pivotal portion on the side wall portion of the fixed operation portion. A long hole having a size over a moving range is formed, or a hole is formed in a range in which the second pivotal support swings, and the long hole or the hole constitutes the second pivotal support. It is used when the connecting pin is attached to and detached from the movable operation unit.

  According to the branch cutting scissors according to the fourth aspect of the present invention, in a state where the movable operation part is slidably connected to the fixed operation part via the first pivot part, the connecting pin constituting the second pivot part is provided. It can be inserted into a long hole or hole formed in the side wall portion and attached to the movable operation portion. Moreover, the connection pin attached to the movable operation part can be removed from this long hole or hole. In this way, it is convenient to easily assemble and disassemble the pruning fence. Then, by forming a long hole in the side wall portion, the connecting pin can be attached and detached even when the movable operation portion is moved to an arbitrary swinging position.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, the inner edge portions of the long hole facing each other are connected to each other by a reinforcing portion.

  According to the branch cutting scissors according to the fifth invention, when a long hole is formed in the side wall portion, the compressive strength of the side wall portion is reduced by that amount, but the inner edge portions of the long hole facing each other are joined to each other by the reinforcing portion. Thereby, the fall of the intensity | strength of a side wall part can be suppressed. Thereby, the fall of the cutting ability for cutting a branch with a scissors can be suppressed.

  According to a sixth aspect of the present invention, in the first to third aspects of the invention, the side wall portion of the fixing operation portion is swung around the first pivot portion. In such a range, the second pivot portion is formed so as to cover it.

  The side wall portion of the fixed operation portion provided in the branch cutting rod according to the sixth aspect of the invention is formed so as to cover the second pivot portion in a range where the second pivot portion swings around the first pivot portion. Therefore, in other words, by not forming a long hole or a hole, the compressive strength of the side wall can be increased, and the cutting ability for cutting the branch with a scissors can be increased.

  According to the branch cutting rod according to the first aspect of the invention, when the operator swings the movable operation portion with respect to the fixed operation portion to cut a tree branch, the cutting resistance force generated by the cutting resistance to the branch is It is transmitted to the movable blade and acts on the side wall portion of the fixed operation portion, and this side wall portion is configured so that a compressive force acts. Therefore, the rigidity in the bending direction of the portion where the first pivotal support portion of the fixed operation portion is provided and the vicinity thereof can be increased, and the bending of the fixed operation portion in the bending direction can be suppressed. As a result, the branches can be strongly cut with the scissors, and as a result, the sharpness is extremely good, a strong cutting force is exhibited, and a relatively light weight can be provided. Therefore, even a worker with weak arm strength or grip strength, such as an elderly person, can efficiently perform the pruning work of a living tree by using the pruning shears according to the first invention.

  Moreover, since the 2nd pivot part which connects a movable operation part and a movable connection part is arrange | positioned inside the side wall part of a fixed operation part, it is understood that wood chips etc. are pinched | interposed into this 2nd pivot part during pruning work. Can be prevented. Therefore, the movable operation unit can be smoothly opened and closed with respect to the fixed operation unit, and the pruning operation of the living tree can be efficiently performed by this.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the branch cutting scissors which concern on 1st Embodiment of this invention, (a) is a front view which shows this branch cutting scissors, (b) is the partial expansion front which shows the state which opened the scissors of this branch cutting scissors FIG. It is a figure which shows the fixed frame and movable frame of the branch cutting tack which concern on the 1st Embodiment, (a) is the partial expanded front view, (b) is the partial expanded side view. It is a partial enlarged front view for demonstrating the force which acts on each part when it begins to cut | disconnect a branch with the scissors of the branch cutting scissors based on the said 1st Embodiment. It is a partial enlarged front view for demonstrating the force which acts on each part during the cutting | disconnection of a branch with the branch of the branch cutting stick which concerns on the 1st Embodiment. It is a partial expanded sectional view for demonstrating the force which acts on each part during the cutting | disconnection of a branch with the scissors of the branch cutting scissors concerning 2nd Embodiment of the same invention. It is a partial expanded sectional view for demonstrating the force which acts on each part during the cutting | disconnection of a branch with the scissors of the branch cutting scissors concerning 3rd Embodiment of the invention. It is a front view which shows the conventional branch cutting stick. It is a partial enlarged front view for demonstrating the force which acts on each part when it begins to cut | disconnect a branch with the scissors of the conventional branch cutting stick. It is a partial enlarged front view for demonstrating the force which acts on each part during the cutting | disconnection of a branch with the branch of the conventional branch cutting stick.

  Hereinafter, a first embodiment of a branch cutting scissors according to the present invention will be described with reference to FIGS. As shown in FIGS. 1 (a) and 1 (b), an operator operates the movable handle 5 provided at the lower end of the fixed connecting portion 2 to open and close the fixed handle 4. Thus, the high branch 14 can be easily cut off by the eaves 3 provided at the upper end portion of the fixed connecting portion 2.

  As shown in FIGS. 1 (a) and 1 (b), the flange 3 is provided at the upper end of a long fixed connecting portion 2 (for example, a fixed connecting tube) so as to be freely opened and closed, and has a fixed blade 6 and a movable blade 7. Have. The fixed blade 6 is fixedly attached to the upper end portion of the fixed connecting portion 2, and the movable blade 7 is swingably provided with respect to the fixed blade 6 via the third pivotal support portion 10.

  The end of the movable blade 7 is connected to the upper end of a movable connecting portion 12 (for example, a movable connecting rod) so as to be swingable via the fourth pivot 11 and the lower end of the movable connecting portion 12 is It is connected to the movable frame 18 through the two pivotal support parts 9 so as to be swingable. The movable frame 18 has a proximal end portion of the movable handle 5 attached thereto. The movable connecting portion 12 is inserted through the inner hole of the fixed connecting portion 2.

  Further, the movable frame 18 is provided on the fixed frame 19 so as to be swingable via the first pivotal support portion 8. The movable frame 18 and the fixed frame 19 are made of, for example, metal and have increased rigidity.

  As shown in FIGS. 1A and 1B, the fixed frame 19 is provided with a first receiving port 20 at its upper end and a second receiving port 21 at its lower end. . The lower end portion of the fixed connecting portion 2 is attached and fixed to the first receiving portion 20, and the base end portion of the fixed handle 4 is attached and fixed to the second receiving portion 21. Attached.

  The fixed handle 4 and the fixed frame 19 coupled to each other are a fixed operation unit, and the movable handle 5 and the movable frame 18 coupled to each other are a movable operation unit.

  Further, as shown in FIG. 2A, a side wall portion 22 is formed on the fixed frame 19. When the movable handle 5 is swung in the direction of the arrow, the side wall portion 22 expands further to the outside of the rocking radius position where the second pivot portion 9 swings around the first pivot portion 8. It is formed into a shape. That is, the side wall portion 22 has a whole range outside the first pivotal support 8 on the basis of the arcuate locus in which the second pivotal support 9 swings around the first pivotal support 8. It is formed in a shape that expands over.

  Specifically, the left and right edge portions 22a and 22b of the side wall portion 22 extend downward from the left and right edge portions of the lower end portion of the first receiving portion 20 as shown in FIG. At the same time, it is formed so as to be directed to the left and right outer directions. And the left edge 22a of the side wall part 22 is connected to the left edge of the upper end part of the 2nd receiving port part 21 as it goes to the left side as it is. The right edge 22b of the side wall 22 is connected to the right edge at the lower end of the first receiving port 20 and the right edge at the upper end of the second receiving port 21. It is formed in an arc shape that expands outward. Thus, the right edge 22b of the side wall 22 that expands in an arc shape is formed along a long hole 23 formed in an arc shape to be described later. That is, the right edge portion 22b of the side wall portion 22 is located on the opposite side of the first pivot portion 8 with respect to the arc-shaped trajectory in which the second pivot portion 9 swings around the first pivot portion 8. It is formed in a shape that expands over the entire outer range.

  Further, the side wall 22 of the fixed frame 19 is formed with a long hole 23 having a size over a range in which the second pivotal support 9 swings around the first pivotal support 8. The long hole 23 is formed along a substantially arc direction, and is used for attaching the connecting pin 9 a constituting the second pivotal support portion 9 to the movable frame 18. Therefore, the width of the long hole 23 is large enough to allow the connecting pin 9a to be inserted.

  Then, as shown in FIG. 2A, the mutually opposite inner edge portions of the long hole 23 are coupled to each other by the reinforcing portion 24. The reinforcing portion 24 is formed outside the outer surface of the side wall portion 22 so as not to hinder the movement of the second pivotal support portion 9 that swings along the long hole 23.

  Further, as shown in FIGS. 2A and 2B, the fixed frame 19 is formed by bending, for example, a metal plate-like body formed in a predetermined shape so that the cross section is U-shaped. The pair of plate-like bodies formed at a distance from each other are the side wall portions 22 and 22, respectively. Each of the pair of side wall portions 22 has the same shape, and a long hole 23 and a reinforcing portion 24 are formed in each of the side wall portions 22.

  And the 1st pivot part 8 which connects the movable frame 18 to the fixed frame 19 so that rocking is possible becomes a structure which uses a rivet, for example. Of course, bolts and nuts may be used so as to be swingably connected. Moreover, the 2nd pivotal support part 9 which connects the lower end part of the movable connection part 12 to the movable frame 18 so that rocking | fluctuation is possible is a structure which uses the connection pin 9a, for example. A retaining ring is attached to the connecting pin 9a so that the connecting pin 9a does not come off.

  According to the pruning rod 17 shown in FIG. 3 and the like configured as described above, the operator holds the fixed handle 4 and the movable handle 5 with the left and right hands, and holds the movable handle 5 with the first pivot 8. By swinging in the opening / closing direction about the center, the movable connecting portion 12 connected to the movable handle 5 can be moved in the vertical direction. Then, by the movement of the movable connecting portion 12 in the vertical direction, the movable blade 7 of the rod 3 can be swung around the third pivotal support portion 10, and the rod 3 can be opened and closed. Thus, the branch 14 can be cut off by opening and closing the basket 3.

  Next, with reference to FIG. 3 and FIG. 4, a description will be given of the force acting on each part when the branches 14 are cut out using the cutting barb 17. As shown in FIG. 3, force F <b> 1 (applies to the movable handle 5) in a direction to close the movable handle 5 with respect to the fixed handle 4 with the branch 14 sandwiched between the movable blade 7 and the fixed blade 6 of the heel 3. When force (force) and F2 (force applied to the fixed handle 4) are applied, the force based on the force F2, force F3, and force F4 are applied to the fixed frame 19 according to the principle of “lever”.

  That is, when the movable handle 5 shown in FIG. 3 is considered to rotate with the force of F1 about the first pivot 8 as a fulcrum, the second pivot 9 becomes an action point, and the force applied to the second pivot 9 is The first receiving part 20 of the fixed frame 19 coupled to the fixed connecting part 2 is pressed downward with a force F3 through the movable connecting part 12, the movable blade 7, the fixed blade 6 and the fixed connecting part 2 of the flange 3. .

  Further, assuming that the movable handle 5 rotates with the force of F1 about the second pivot 9 as a fulcrum, the first pivot 8 acts as an action point, and the force F4 applied to the first pivot 8 causes the fixed frame 19 to move. Press. Thus, the fixed frame 19 is pressed against the both side portions (the first receiving portion 20 and the second receiving portion 21) of the fixed frame 19 in a state in which the first pivotally supporting portion 8 is pressed outward by the force F4. Thus, the force of F3 and the force based on F2 work in the direction of bending with the first pivotal support 8 as a reference.

  At this time, a compression force acts on the pair of side wall portions 22, 22 formed on the fixed frame 19, and a bending force does not act on the portion where the first pivotal support portion 8 of the fixed frame 19 is provided and the vicinity thereof. Can be. As a result, the rigidity of the portion of the fixed frame 19 where the first pivotal support portion 8 is provided and the vicinity thereof can be increased, and the fixed frame 19 is able to increase the force based on the above (force F1) and F2, the force F3. And it can suppress bending in the direction bent by force F4.

  In short, if the side wall 22 is subjected to a compressive force, the fixed frame 19 uses less material than the case where a bending force acts on the portion of the fixed frame 19 where the first pivotal support 8 is provided. The rigidity with respect to a bending direction, such as a part provided with 19 first pivotal support portions 8, can be increased.

  Further, the side wall portion 22 is subjected to a compressive force when the side wall portion 22 is swung in the direction of the arrow shown in FIG. This is because it is formed in a shape that expands further to the outer side of the rocking radius position that rocks around the center 8.

  Thereby, since it can suppress that the fixed frame 19 bends in the bending direction, the branch 14 can be strongly cut off by the ridge 3. As a result, it is possible to provide the branch lighter 17 having a very good sharpness and a strong cutting force and a relatively light weight. Therefore, even a worker with weak arm strength or gripping force, such as an elderly person, can efficiently perform a pruning operation of a living tree by using the branch cutting rod 17.

  Further, as shown in FIGS. 2A and 2B, the second pivotal support portion 9 that connects the movable frame 18 and the movable connection portion 12 is disposed inside the side wall portion 22 of the fixed frame 19. It is possible to prevent wood chips and the like from being pinched by the second pivotal support portion 9 during the pruning operation. Therefore, the movable handle 5 can be smoothly opened and closed with respect to the fixed handle 4, and the pruning work of the raw tree can be efficiently performed by this.

  As shown in FIG. 3, the first pivotal support 8 is provided for the movable frame 18 and the fixed frame 19, and the second pivotal support 9 is provided for the movable frame 18. The fixed frame 19 can be formed of a highly rigid metal material or the like, and the other fixed handle 4, movable handle 5, fixed connecting portion 2, and movable connecting portion 12 are lightweight materials each having a necessary strength. Can be formed. Thereby, the cutting ability for cutting the branch 14 with the scissors 3 can be increased, and the weight of the scissors 17 can be reduced.

  As shown in FIG. 2A, a long hole 23 is formed in each of the pair of side wall portions 22 of the fixed frame 19 over an arcuate range. By forming the long hole 23 in this manner, the connecting pin constituting the second pivotal support 9 in a state where the movable frame 18 is pivotably coupled to the fixed frame 19 via the first pivotal support 8. 9a can be inserted into the elongated hole 23 and attached to the movable frame 18. In this way, the movable frame 18 and the movable connecting portion 12 can be slidably connected to each other.

  Further, the connecting pin 9 a connecting the movable frame 18 and the movable connecting portion 12 can be removed from the long hole 23. In this way, it is convenient to easily assemble and disassemble the branch culvert 17. And by forming the long hole 23 in the side wall part 22, even if the movable frame 18 has moved to arbitrary rocking | fluctuation positions, the connection pin 9a can be attached or detached.

  However, although the long hole 23 was formed in each pair of side wall part 22 of the fixed frame 19, it may replace with this and may form a circular hole, for example. By using this circular hole, the connecting pin 9 a constituting the second pivotal support portion 9 can be attached to and detached from the movable frame 18 and the movable connecting portion 12.

  Further, as shown in FIGS. 2A and 2B, when the long holes 23 are formed in the pair of side wall portions 22, the compressive strength of the side wall portions 22 decreases by that amount, but the long holes 23 face each other. By connecting the inner edge portions to each other by the reinforcing portion 24, it is possible to suppress a decrease in strength of the side wall portion 22. Thereby, the fall of the cutting ability for cutting the branch 14 with the scissors 3 can be suppressed.

  Next, a second embodiment of the branch cutting scissors according to the present invention will be described with reference to FIG. The difference between the pruning shears 26 of the second embodiment shown in FIG. 5 and the pruning shears 17 of the first embodiment shown in FIG. 2 (a) is that the first embodiment shown in FIG. 2 (a). In the second embodiment shown in FIG. 5, the fixed connection portion 2 has a configuration in which the central axis of the fixed connection portion 2 is positioned approximately in the middle of the closed fixed handle 4 and the movable handle 5. The central axis of the portion 2 is configured to substantially coincide with the central axis of the fixed handle 4.

  In the first embodiment shown in FIG. 2A, the right edge 22b of the side wall 22 of the fixed frame 19 has a shape that expands to the right outside in an arc shape, whereas the first embodiment shown in FIG. In the second embodiment, the right edge portion 27 b of the side wall portion 27 of the fixed frame 19 substantially includes the right edge portion at the lower end portion of the first receiving port portion 20 and the right edge portion at the upper end portion of the second receiving port portion 21. The place where it is connected in a straight line is also different.

  In addition, although the long hole 23 and the reinforcement part 24 are formed also in a pair of each side wall part 27 with which the fixed frame 19 of 2nd Embodiment shown in FIG. 5 is provided, it is not illustrated.

  Except for this, the configuration is the same as that of the first embodiment and acts in the same way, so the equivalent parts are denoted by the same reference numerals and the description thereof is omitted.

  Next, a third embodiment of the branch cutting scissors according to the present invention will be described with reference to FIG. The difference between the branch cutting bar 29 of the third embodiment shown in FIG. 6 and the branch cutting bar 17 of the first embodiment shown in FIG. 2 (a) is the same as that of the first embodiment shown in FIG. 2 (a). In the third embodiment shown in FIG. 6, the fixed handle 4 is fixed and attached to the end of the fixed frame 19 and the movable handle 5 is fixed and attached to the end of the movable frame 18. The fixed lever 30 is formed integrally with the fixed frame 19 and the movable lever 31 is formed integrally with the movable frame 18.

  Note that the movable lever 31 shown in FIG. 6 is urged by a spring (not shown) in the opening direction with respect to the fixed lever 30. And although the long hole 23 and the reinforcement part 24 are formed also in a pair of each side wall part 22 with which the fixed frame 19 is provided, it is not shown in figure.

  According to the branch cutting rod 29 shown in FIG. 6, the tree branch 14 can be cut off by the rod 3 by the operator holding the fixed lever 30 and the movable lever 31 by hand. Then, by loosening the hand gripping force, the movable lever 31 is automatically opened by the spring force, and the next branch 14 can be cut off.

  Except for this, the configuration is the same as that of the first embodiment and acts in the same way, so the equivalent parts are denoted by the same reference numerals and the description thereof is omitted.

  However, in each of the above-described embodiments, the long hole 23 or the circular hole is provided in each of the pair of side wall portions 22 and 27 of the fixed frame 19, but the long hole 23 or the circular hole may not be provided. Accordingly, the side walls 22 and 27 of the fixed frame 19 are formed so as to cover the second pivot 9 in a range where the second pivot 9 swings around the first pivot 8.

  Thus, by not forming the long hole 23 or the hole, the compressive strength of the side wall portions 22 and 27 can be increased, and the cutting ability for cutting the branch 14 with the scissors 3 can be increased. .

  Further, as described above, when the movable frame 18, the fixed frame 19, and the movable coupling portion 12 are assembled when the long hole 23 or the circular hole is not provided, for example, first, the movable frame 18 and the movable coupling shown in FIG. The part 12 is pulled away from the fixed frame 19. Next, the movable frame 18 and the movable connecting portion 12 are connected to each other by the second pivot support portion 9. The movable frame 18 and the fixed frame 19 are connected to each other by the first pivotal support portion 8. In this way, the movable frame 18, the fixed frame 19, and the movable connecting portion 12 can be assembled.

  Furthermore, in each said embodiment, although the movable connection part 12 was formed with the rod-shaped body, it may replace with this and may form the movable connection part 12 with linear bodies, such as a wire. Thus, when the movable connection part 12 is formed with a linear body, for example, the movable blade 7 is opened in the opening direction so that the movable blade 7 of the flange 3 is automatically opened with respect to the fixed blade 6. It is preferable to provide a spring for biasing the movable blade 7.

  In each of the above embodiments, for example, as shown in FIGS. 1A and 1B, the reinforcing portion 24 is provided. However, the reinforcing portion 24 may not be provided.

  As described above, the pruning shears according to the present invention can cut a thick branch or a hard branch with good sharpness, can be reduced in weight, and can be fixedly operated in the movable operation unit during the pruning operation. This has an excellent effect of preventing the rocking operation of the wood from being hindered by wood chips or the like, and is suitable for application to such a branch cutting basket.

DESCRIPTION OF SYMBOLS 1 Branch cutting rod 2 Fixed connection part 3 ４ 4 Fixed handle 5 Moveable handle 6 Fixed handle 7 Moveable blade 8 First pivot part 9 Second pivot part 9a Connecting pin 10 Third pivot part 11 Fourth pivot part 12 Movable connection part 13 Movable frame 14 Branch 15 Fixed frame 17 Branch cutting rod 18 Movable frame 19 Fixed frame 20 First receiving portion 21 Second receiving portion 22 Side wall portion 22a Left side edge portion 22b Right side edge portion 23 Long hole 24 Reinforcing portion 26 Branch cutting rod 27 Side wall 29 Branch cutting rod 30 Fixed lever 31 Movable lever

Claims (6)

A fixed blade of a scissors is provided at one end of the fixed connecting portion, a fixed operating portion is provided at the other end of the fixed connecting portion, and the fixed operating portion is swingably provided via the first pivotal support portion. In a branch cutting scissor that can open and close the movable blade of the scissors connected to the movable operation unit by swinging the movable operation unit with respect to the fixed operation unit,
The movable operation part is provided with a second pivot part, and the movable operation part and the movable blade of the scissors are connected to each other through the second pivot part.
The fixed operating portion has a shape that expands further to the outer side of the swinging radius position where the second pivotal support swings about the first pivotal support when the movable operation part is swung. A branch cutting pad having a side wall formed. The fixing operation unit has a fixed handle and a fixed frame coupled to an end of the fixed handle, and one end of the fixed connecting portion is coupled to the fixed frame,
The movable operation unit has a movable handle and a movable frame coupled to an end of the movable handle,
The movable frame is swingably provided on the fixed frame via the first pivotal support unit, and is further connected to one end portion of the movable coupling unit via the second pivotal support unit. The branch cutting scissors according to claim 1, wherein an end portion is connected to a movable blade of the scissors.   The fixed operation unit includes a fixed lever, the movable operation unit includes a movable lever, and the fixed lever and the movable lever are operated by grasping with a hand. The pruning shears according to claim 1.   The side wall portion of the fixed operation portion is formed with a long hole having a size over the range in which the second pivot portion swings around the first pivot portion, or the second pivot portion is A hole is formed in a swinging range, and the long hole or the hole is used when a connecting pin constituting the second pivotal support part is attached to or detached from the movable operation part. The pruning shears according to any one of claims 1 to 3.   The branch cutting scissors according to claim 4, wherein inner edges of the long holes facing each other are joined to each other by a reinforcing portion.   The side wall portion of the fixed operation portion is formed so as to cover the second pivot portion in a range in which the second pivot portion swings around the first pivot portion. Item 12. A branch cutting stick according to any one of Items 1 to 3.

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