JP2726393B2 - High branch cutting shears - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to high-pruning scissors used for pruning branches of fruit trees.

[0002]

2. Description of the Related Art Conventionally, an extensible pole pattern is constructed by slidingly fitting a front pole on a base pole, scissors are arranged at the tip of the pole handle, and a handle and scissor operation lever are provided at the base end of the pole handle. High branch scissors have been proposed in which the length of the pole handle can be adjusted in a one-touch manner by operating an adjustment lever provided at the tip of the base pole.

[0003] In this kind of high branch cutting scissors, there is provided a pressing pin which moves in and out of a pole handle under the bias of a spring in association with an adjusting lever, and the pressing pin is provided at a predetermined interval on a front pole. The pin is selectively pushed into the pin hole to set the pole handle length, and the press pin corresponds to the intermediate member of the coupling mechanism that connects the scissors and the scissor operation lever in the pole handle, and presses the intermediate member. The configuration is such that the length of the coupling mechanism is fixed to a length suitable for the pole handle length by pressing the pin.

[0004]

As described above, in the conventional high branch scissors capable of changing the pole handle length, the pressing pin provided at the tip of the base pole enters and exits the pole handle to set the pole handle length. In the configuration in which the length of the coupling mechanism passing through the inside of the pole handle in a state where the pressing pin is pressed against the relay member is fixed, the position of the pressing pin at which the relay member of the coupling mechanism in the pole handle enters and exits the pole handle. Because of the configuration that cannot be separated from the pole, the pole handle length is changed by changing the protruding length of the front pole stepwise with respect to the base pole, and the pole pattern is It is limited to a two-stage telescopic structure in which a pole is slid.

Therefore, when the pole handle is reduced to the minimum, the length of the pole handle is about half of the maximum extension of the pole handle (slightly longer than the base pole length). For example, if the maximum length of the pole handle is about 3 m,
The pole handle can be reduced to about 5m.

[0006] As described above, the degree of reduction in the pole handle length greatly affects the portability of the high branch cutting scissors when not in use.
For example, even if the maximum length of the pole pattern is about 3 m, which is the same as the above-described two-stage telescopic structure, if the pole pattern is made into a three-stage telescopic structure, the pole pattern length can be reduced to nearly 1 m. When carrying high branch cutting scissors in a car, the bulk becomes small and it is very convenient.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and has as its object to provide high-pruning scissors having a pole handle having a three-stage expansion / contraction structure and improved workability and portability.

[0008]

According to a first aspect of the present invention for achieving the above object, scissors are provided at the tip of a pole handle, and a fixed handle and a scissor operation lever are provided at a base end of the pole handle. The base pole, intermediate pole, and top pole are slidably and sequentially slidably fitted to the high branch cutting scissors in which the movable blade of the scissors and the scissor operating lever are arranged in a pole handle and connected by an adjustable length connecting member. And a securing mechanism provided at each of the base pole and the tip of the intermediate pole to fix the corresponding inscribed pole at two positions, an extended position and a reduced position, a tubular outer rod, a tubular middle rod, and a core rod. Is slid in order to extend and contract
A connecting member for connecting the scissors and the scissor operation lever, a spring disposed in connection with the tip of the middle rod to bias the middle rod in the extending direction, It moves up and down under the bias of the spring in conjunction with the scissors operation lever,
High branch cutting scissors comprising a locking member having a locking body which is individually engaged and disengaged with a locking step provided at a base end of an outer rod and a base end of a middle rod.

In a second structure, a long hole is formed in the longitudinal direction of the outer rod in the first structure, and a projecting piece provided at the tip of the middle rod projects from the long hole, and the projecting piece and the fixed handle base member are formed. High branch cutting scissors characterized by disposing a spring for urging the middle rod in the extension direction.

[0010] A third configuration is a core rod end connected to the scissors operation lever in the first configuration, wherein a pivot of a locking member is provided orthogonal to the core rod axis, and the locking member near the pivot is provided. A cam portion is provided on the outer peripheral upper surface, a pressing pin pressed against the cam portion is projected from the scissor operation lever surface, and a pressing piece pressed against the locking member is pivotally attached to the scissor operation lever, A high scissors scissors characterized in that a spring for urging the locking member in the downward direction is disposed between the pressing piece and the scissor operation lever.

In a fourth configuration, two locking members provided on the locking member are moved forward and backward corresponding to the locking step of the middle rod base end and the locking step of the outer rod base end in the first configuration. In a state where the locking member is laid down over the middle rod base end and the outer rod base end,
High branch cutting scissors characterized in that locking of a locking body with respect to a locking step of a base end of an outer rod precedes.

[0012]

When the scissors operation lever is moved from the open position to the closed position, the pressing pin moves the cam portion toward the front, the pressing force is rapidly reduced, and the locking member falls down. This locking member falls down immediately after the scissors operation lever starts closing movement.

Therefore, when the intermediate pole is fixed at the reduced position with respect to the base pole and the front pole is fixed at the reduced position with respect to the intermediate pole to reduce the pole handle length to the minimum, the locking member falls down. The locking body is locked to the locking step at the base end of the outer rod, and the operating force of the scissor operating lever is transmitted directly from the outer rod to the scissors.

When the intermediate pole is fixed in the retracted position with respect to the base pole and the front pole is fixed in the extended position with respect to the intermediate pole, or when the intermediate pole is fixed in the extended position with respect to the base pole, In contrast, when the tip pole is fixed in the reduced position and the pole handle is extended in two stages, the locking member locks down to the locking step at the base end of the middle rod due to the falling down of the locking member and scissors operation The operating force of the lever is transmitted to the scissors via the middle rod and the outer rod.

When the intermediate pole is fixed in the extended position with respect to the base pole and the front pole is fixed in the extended position with respect to the intermediate pole and the pole handle length is maximized, the operating force of the scissor operating lever is limited to the core rod. Is transmitted to the scissors via the middle and outer rods.

When the scissors operation lever is in the open position,
The pressing pin is pressed near the rear end of the cam portion, and the locking member stands up against the spring and is separated from the base end of the middle or outer rod. The pattern length can be adjusted in three stages.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention. FIG. 2 is a partially cutaway sectional view of a connecting member.
FIG. 3 is a side view for explaining the operation of the locking member, FIG. 4 is a side view for explaining the operation of the locking member, and FIG.
(A), (b), and (c) are plan views for explaining the locking relationship between the locking body and the locking step, FIG. 6 is a cross-sectional view for explaining the operation of the scissor operation lever, and FIG. It is sectional drawing for demonstrating the operation | movement of a scissors operation lever similarly.

In the figure, 1 indicates a pole handle. The pole handle 1 has a base pole 1a, an intermediate pole 1b, and a tip pole 1c which are sequentially slidably fitted in a stretchable manner, scissors 2 are arranged at the tip of the pole handle, and a fixed handle 3 is provided at the base end of the pole handle. A scissor operation lever 4 is provided. The scissors 2 have a movable blade 2b pivotally connected to a fixed blade 2a fixed to the tip pole 1c so as to be freely opened and closed. The fixed handle 3 is integral with the pole handle base member 3a, and the scissor operation lever 4 is pivotally attached to the base member 3a, so that the fixed handle 3 and the scissor operation lever 4 are held together with one hand for operation. I am trying to do it.

Reference numeral 5 denotes a securing mechanism provided at each of the distal ends of the base pole 1a and the intermediate pole 1b. An adjusting lever 5a is provided at the distal end of the pole, and a securing pin 5b is provided at the distal end of the adjusting lever.
A pin hole 6 into which the securing pin 5b is inserted is formed at the base end and the tip of the corresponding inscribed pole, and the spring 5c is linked with the adjustment lever 5a.
The corresponding inscribed pole is fixed by the securing mechanism 5 at two positions of an extended position and a contracted position.

Reference numeral 7 denotes a connecting member for connecting the scissors 2 and the scissor operating lever 4 in the pole handle.
As shown in the figure, the tubular outer rod 7a, the tubular middle rod 7b and the core rod 7c are successively slidably fitted to extend and contract, and the outer rod tip is connected to the movable blade piece 2b of the scissors 2 via the connecting member 8. It is connected to the scissors operating lever 4 by sharing the base end of the core rod with the pivot 9 of the locking member described later. In the sliding fit between the outer rod 7a and the middle rod 7b, a long hole 10 is formed in the outer rod 7a in the longitudinal direction, and a protruding piece 11 provided at the tip of the middle rod is protruded from the long hole 10 to make the outer rod 7a. The protruding piece 11 is hooked on the end of the long hole on the outer rod base side with the middle rod 7b fully extended with respect to 7a. Further, in the sliding fit between the middle rod 7b and the core rod 7c, the core rod 7c is passed through the bottom of the middle hole of the middle rod 7b,
With the core rod 7c fully extended with respect to the center rod 7b, the stopper 12 attached to the tip of the core rod is hooked on the bottom of the hole. Also, a middle rod 7b is provided between the protruding piece 11 and the pole handle base member 3a.
A spring 13 that urges the middle rod 7b from the outer rod 7a by the spring force alone without an external force is provided.

Further, in a state where the middle rod 7b is reduced with respect to the outer rod 7a (see FIG. 2), the middle rod base end projects a predetermined length from the outer rod base end. Locking steps 14 and 15 are provided at the base end of the middle rod, respectively.

Reference numeral 16 denotes a locking member which moves up and down under the urging of a spring in conjunction with the scissor operation lever 4.
Is used in common with the member for connecting the core rod base end to the scissor operation lever 4, is provided at the core rod end orthogonal to the core rod axis, and the locking member 16 is in the same plane as the scissor operation lever 4. , And moves so as to cover the base end of the middle rod and the base end of the outer rod from above. Also, the locking member 16 is provided with locking members 17, 18 which are individually engaged and disengaged corresponding to the locking step 14 of the outer rod base end and the locking step 15 of the middle rod base end one after another. And these locks 1
The hooks 7 and 18 are engaged with and disengaged from the upper and lower sides of the locking steps 14 and 15, respectively. When the scissors operation lever 4 is in the open position, the locking member 16 stands up and is separated from the middle rod base end and the outer rod base end, and the scissors operation lever 4 closes from the open position. We start and finish the fall immediately. Further, as shown in FIG. 3, a cam portion 19 is provided at the upper part of the pivot 9 on the upper surface of the outer periphery of the pivoting portion of the retaining member 16 in order to raise and lower the retaining member 16 in conjunction with the scissors operating lever 4. A pressing pin 20 pressed against the cam portion 19 protrudes from the scissor operation lever surface, and a pressing piece 21 pressed against the locking member 16 from above is pivotally attached to the scissor operation lever 4. Then, a spring 22 is arranged between the pressing piece 21 and the scissor operation lever 4 (FIG. 5).
(See FIG. 2), and the locking member 16 is urged in the downward direction.

In the above configuration, the locking member 16 is moved up and down as follows.

As shown in FIG. 3, when the scissors operating lever 4 is in the open position, the pivot 9 of the locking member 16 is located forward (to the right in the figure) of the pivot 23 of the scissors operating lever 4. The pressing pin 20 is located rearward of the pivot 9 and pressed against the rear end of the cam portion 19, and the pressing force of the pressing pin 20 causes the locking member 16 to move.
Is standing against the spring 22 in a form that can be flipped up.

That is, the locking member 16 is separated upward from the proximal end of the middle rod and the proximal end of the outer rod.

When the scissors operation lever 4 is closed from the open position, the scissors operation lever 4 starts to move around the pivot 23 of the scissors operation lever 4 as a rotation center, and the pivot 9 of the locking member 16 moves to the scissors operation lever.
4 descends below the pivot 23. With this rotation, the position of the pressing pin 20 pressing on the cam portion 19 moves toward the front of the cam portion 19, so that the pressing force of the pressing pin 20 decreases sharply and the locking member 16 It falls down under urging. This locking member 16
Is immediately stopped after the scissors operation lever 4 starts to close, and the locking member 16 thereafter falls down under the bias of the spring 22 as shown in FIG. The scissors operating lever 4 is moved backward with the rotation of the scissor operation lever 4 while covering the base end of the rod and the base end of the outer rod.

In the figure, reference numeral 24 denotes a spring which is provided in association with the movable blade 2b of the scissors 2, a spring for urging the movable blade 2b in the opening direction, and reference numeral 25 denotes a spring which is provided in association with the scissor operation lever 4. And a spring for urging the scissor operation lever 4 in the opening direction.

However, when the pole handle length is reduced to the minimum, that is, when the intermediate pole 1b is fixed at the reduced position with respect to the base pole 1a and the front pole 1c is fixed at the reduced position with respect to the intermediate pole 1b, As shown in FIGS. 5A and 6, the base end of the outer rod and the base end of the middle rod of the connecting member 7 face the locking member 16. Here, when the scissors operation lever 4 is closed, the locking member 16 falls down so as to cover from both the middle and outer rod base ends from above, interlocking with the scissors operation lever 4, The two locking members 17 and 18 enter at the same time in front of the locking step 14 of the outer rod base and the locking step 15 of the middle rod base. Continue to use the shears lever 4
When the locking member 16 is moved backward, the locking body 17 is locked to the locking step 14 at the base end of the outer rod, and in this state, the scissors operation lever 4 is closed as shown in FIG. Is reached, the operating force of the scissors operation lever 4 is transmitted to the scissors 2 via the outer rod 7a.

Here, the locking body 18 corresponding to the locking step 15 of the middle rod base end is released from the locking step 15 and the scissor operation lever
It has no effect on the transmission of the operating force in 4.

Next, when the pole handle length is extended in two stages, that is, the intermediate pole 1b is fixed at the reduced position with respect to the base pole 1a, and the front pole 1c is fixed at the extended position with respect to the intermediate pole 1b. 5 or when the intermediate pole 1b is fixed at the extended position with respect to the base pole 1a and the front pole 1c is fixed at the contracted position with respect to the intermediate pole 1b.
As shown in (b), the middle rod base end of the connecting member 7 faces the locking member 16. Here, when the scissors operation lever 4 is closed, the locking member 16 falls down so as to cover the base end of the middle rod from above in conjunction with the scissors operation lever 4, and the locking body 18 is in front of the locking body 15. Enter towards. Continue operating the scissors operation lever 4 to lock
The locking member 18 is locked to the locking step 15 at the base end of the middle rod by the backward movement of the locking member 16 until the scissors operating lever 4 reaches the closed position.
The operating force of the scissors operation lever 4 is applied to the scissors 2 via the middle rod 7b and the outer rod 7a.
Is transmitted to

When the intermediate pole 1b is fixed at the reduced position with respect to the base pole 1a, the center rod 7b is located in the middle pole 1b (within the base pole) together with the core rod 7c. It faces the locking member 16. When the intermediate pole 1b is fixed at the extended position with respect to the base pole 1a and the front pole 1c is fixed at the contracted position with respect to the intermediate pole 1b, the middle rod 7b has a spring.
Under the bias of 13, it is pushed out from the inside of the intermediate pole toward the base pole 1a, and is located together with the core rod 7c in the base pole 1a so that its base end faces the locking member 16.

Next, when the pole handle length is maximized, that is, the intermediate pole 1b is fixed at the extended position with respect to the base pole 1a, and the front pole 1c is fixed at the extended position with respect to the intermediate pole 1b. When connecting, the connecting member in the pole handle
7, the outer rod 7a, the middle rod 7b and the core rod 7c are in a fully extended state. As shown in FIG. 5 (c), the locking member 16 applies the operating force of the scissor operation lever 4 to the scissors. The locking member 16 falls down and covers the base end of the core rod from above without being involved from above, and the operating force of the scissors operation lever 4 is applied to the core rod 7c, the middle rod 7b, and the outside. It is transmitted to the scissors 2 via the rod 7a.

When the scissors operating lever 4 is in the open position, the locking member 16 rises and separates above the center end of the middle rod or the outer rod, and the lower end of the middle rod or Since the base end of the outer rod can freely enter and exit, the pole handle length can be adjusted in three stages by operating the adjustment lever 5a of the lashing mechanism 5.

[0035]

According to the present invention having the above configuration, the following effects can be obtained.

(1) The pole handle has a three-stage elastic structure,
The pole handle length can be adjusted in one-touch fashion by simply grasping and operating the adjustment lever of the lashing mechanism, so that the pole handle length when using scissors can be easily adjusted to the optimal length for cutting work, improving workability. Further, when the scissors are not used, the pole handle length can be shortened to reduce the bulk, thereby greatly improving the portability.

(2) The locking member for transmitting the operating force of the scissor operating lever to the scissors is provided with a scissor operating lever which starts to close from the open position and ends immediately when the scissors operating lever is closed. Therefore, there is little play in the movement of the scissor operation lever, and the operation of the scissor operation lever can be effectively transmitted to the scissors to perform the cutting operation efficiently.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention with a part removed.

FIG. 2 is a sectional view in which a part of a connecting member is omitted.

FIG. 3 is a side view for explaining the operation of the locking member.

FIG. 4 is a side view for explaining the operation of the locking member.

FIGS. 5A, 5B, and 5C are plan views for explaining a locking relationship between a locking body and a locking step.

FIG. 6 is a sectional view for explaining the operation of the scissor operation lever.

FIG. 7 is a sectional view for explaining the operation of the scissor operation lever.

[Explanation of symbols]

 1… Pole handle 1a… Base pole 1b… Intermediate pole 1c… Top pole 2… Scissors 2b… Moveable blades of scissors 4… Scissors operating lever 5… Fixing mechanism 7… Connecting member 7a… Tubular outer rod 7b… Tubular middle Rod 7c ... Core rod 13 ... Spring 14 ... Locking step 15 ... Locking step 16 ... Locking member 17 ... Locking body 18 ... Locking body 22 ... Spring

Claims (4)

(57) [Claims] 1. A scissor is disposed at the tip of a pole handle, a fixed handle and a scissor operation lever are provided at a base end of the pole handle, and a movable blade of the scissors and a scissor operation lever are disposed within the pole handle. In the high branch cutting scissors connected by a simple connecting member, a pole pattern is formed by sequentially sliding the base pole, intermediate pole, and front pole in a telescopic manner, and provided at the tip of the base pole and the intermediate pole, respectively. A securing mechanism for fixing the contacting pole at two positions, an extended position and a reduced position, a tubular outer rod,
A connecting member for connecting the scissors and the scissor operating lever is provided by linking the scissor and the scissor operating lever in an extending and contracting manner. The lever is pivotally attached to the core rod connecting portion with respect to the spring and the scissor operation lever, and moves up and down under the urging of the spring in conjunction with the scissor operation lever, and is provided at the outer rod base end and the middle rod base end. A high-pruning scissors comprising a locking member having a locking body that is individually engaged with and disengaged from a locking step. 2. An elongated hole is formed in the longitudinal direction of the outer rod, and a projecting piece provided at the tip of the intermediate rod is projected from the elongated hole, and the intermediate rod is attached between the projecting piece and the pole handle base member in the extending direction. The high branch cutting scissors according to claim 1, further comprising a biasing spring. 3. A pivot of a locking member is provided at a rod end connected to the scissors operating lever at right angles to the axis of the rod, and a cam portion is provided on an upper surface of the outer periphery of the locking member near the pivot. A pressing pin pressed against the cam portion protrudes from the scissor operating lever surface, and a pressing piece pressed against the locking member is pivotally attached to the scissor operating lever, and the pressing piece and the scissor operating lever are connected. The high branch cutting scissors according to claim 1, further comprising a spring for urging the locking member in a downward direction. 4. The two locking members provided on the locking member corresponding to the locking step of the middle rod base end and the locking step of the outer rod base end are moved back and forth, and the locking member is 2. The locking device according to claim 1, wherein, in a state where the locking member is laid down over the base portion and the outer rod base end, locking of the locking body with respect to a locking step of the outer rod base end is performed first. 3. High branch cutting scissors.