JP2011109964A - Expansion/contraction operation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion/contraction operation device reduced in a production cost by lessening the number of parts and forming a first pipe in a small diameter, improved in handling properties through reduction in size and weight, and allowing even an elderly person or a child with weak grasping power to easily operate by reducing operation resistance of an operation lever. <P>SOLUTION: This expansion/contraction operation device includes a switching rod 43 which is internally installed in a first pipe 2 as a first operation force transfer means 40, regulated in movement to the end of the first pipe 2 by a first regulating part 44, and always biased to the end of the first pipe 2 by a first biasing tool 45, a first switching member 46 which is connected to the end part of the switching rod 43 so as to be positioned in the end part of the first pipe 2, a connection rod 47 which connects the first switching member 46 and an operation lever 5, and a first operation rod 48 which is internally installed in a second pipe 3, regulated in movement to the end of the second pipe 3 by a second regulating part 49, and always biased to the end of the second pipe 3 by a second biasing tool 50, and whose middle part is arranged so as to face with the first switching member 46. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an expansion / contraction operation device that can be suitably used for a Takaeda kite.

  As a tool suitable for pruning branches at high places and picking fruits, a pipe member that fits in a telescopic manner, a hook provided at the tip of this pipe member, and an operating lever provided at the base end of the pipe member Various types of high branch ridges have been proposed that include an operation means for opening and closing the ridge by operating an operation lever.

  For example, in a high branch ridge in which an outer pipe and an inner pipe are fitted so as to be stretchable and a lock means for fixing the stretched state is formed, a shaft rod in which an engagement recess is formed from the movable blade of the heel, The extension shaft is extended from the power source, and a holder for supporting the shaft rod in a slidable state is attached to the distal end side of the tension shaft, and the holder is engaged with an engagement recess formed in the shaft rod. A rotating member having a latching portion to be fitted is attached in a spring-biased state, and when the rotating member comes into contact with a fixed shaft arranged inside the long handle, it rotates against the spring-biasing force state. By rotating the moving member, the engagement state between the latching portion formed on the rotating member and the engaging recess formed on the shaft rod is released, and the fixed shaft rotates with the movement of the pulling shaft. Hook formed on the rotating member when the member is disengaged And engaging recesses formed in the shaft rod has been proposed which is configured so that the engaged state (for example, see Patent Document 1.).

  However, in the high branch ridge described in the above-mentioned Patent Document 1, switching between the released state and the engaged state of the engaging recess formed on the shaft rod and the engaging portion of the rotating member is not smoothly performed, and the extension length is adjusted. In some cases, the operating lever has to be opened and closed many times in the vicinity of the fully open position so that the lever is in the released state or engaged state when using the scissors or using the scissors.

  Therefore, the present applicant has intensively studied the cause of the above-mentioned malfunction in the Takaeda kite described in Patent Document 1, and proposed the telescopic operation device described in Patent Document 2 to solve it. The telescopic operation device includes a first length that locks the second pipe with respect to the first pipe so that the second pipe can be telescopically and relatively unrotatably locked, and the telescopic length of the second pipe relative to the first pipe can be adjusted at set intervals. A telescopic operation device provided with a height adjusting means and having a first operating force transmission means for transmitting an operating force of an operating lever provided at a proximal end portion of the first pipe to an operated member provided at a distal end portion of the second pipe. The first operating force transmission means includes a first holder that is movably mounted in the fitting portion with the second pipe in the distal end portion of the first pipe, and a first holder immediately before the fully opened position of the operating lever. A first restricting means for restricting movement of the holder toward the tip end; a first switching member pivotally supported by the first holder; a connecting rod for connecting the first switching member and the operating lever; Connect the connecting rod to the first pipe A first urging means for urging the distal end side, a first operating rod having a distal end portion connected to the operated member, and a midway portion inserted through the first holder, and a first pipe engaged with the second pipe. A second restricting portion for restricting movement of the operating rod toward the distal end side, second urging means for urging the first operating rod toward the distal end side with respect to the second pipe, and a set interval for the first operating rod. A first engaging portion formed of a notch portion or an engaging protrusion, and a first locking portion that is provided on the first switching member and that fits unevenly on the first engaging portion, The first restricting means restricts the movement of the first holder toward the tip end immediately before the fully open position of the operating lever, and the first switching member is rotated by moving the connecting rod back and forth between the position immediately before the fully opening position of the operating lever and the fully open position. The first locking portion and the first engaging portion can be engaged and disengaged by being moved.

JP-A-8-256598 JP 2006-230262 A

  However, also in the telescopic operation device described in Patent Document 2, the first switching member and the first holder, and the first switching urging means for urging the first switching member toward the lock position are the same as those of the first pipe. Since the first pipe is inevitably thicker due to the interior of the position, the first pipe becomes difficult to grip or heavier, and the handling performance of the telescopic operation device is reduced. Further, the first urging means for urging the operation lever toward the open position side rotates the operation lever from the position immediately before fully opened to the fully opened position against the first switching urging means, thereby In order to prevent the disconnection failure, it is necessary to set the urging force of the first urging means to be stronger, which increases the operating resistance of the operating lever and reduces the gripping force. There was a problem that it was difficult for elderly people and children to use.

  The purpose of the present invention is to reduce the number of parts and to configure the first pipe to have a small diameter, to reduce the manufacturing cost, to improve the handleability by reducing the size and weight, and to reduce the operating resistance of the operating lever, The object is to provide a telescopic operation device that can be easily operated by elderly people and children with weak gripping power.

  In the first telescopic operation device according to the present invention, the second pipe can be telescopically fitted into the first pipe so that the second pipe can be telescopically and non-rotatably adjusted, and the telescopic length of the second pipe relative to the first pipe can be adjusted at set intervals. A first length adjusting means for locking to the first pipe, and a first operating force transmitting means for transmitting the operating force of the operating lever provided at the proximal end portion of the first pipe to the operated member provided at the distal end portion of the second pipe. The telescopic operating device is an internal expansion / contraction device, wherein the first operating force transmission means is a switching rod embedded in the first pipe, the first restricting portion restricts the movement toward the tip end of the first pipe, A switching rod that is constantly urged to the distal end side of the first pipe by the urging means and is movable toward the first pipe proximal end side against the urging force of the first urging means, and a distal end portion of the first pipe. A first switching member connected to the tip of the switching rod so as to be disposed A connecting rod for connecting the first switching member and the operating lever, and a first operating rod built in the second pipe, the second restricting portion restricting movement toward the tip end of the second pipe, 2 is always urged to the distal end side of the second pipe by the urging means, can move to the second pipe proximal end side against the urging force of the second urging means, and the distal end portion is connected to the operated member. And a first operating rod arranged at a midpoint so as to face the first switching member, wherein first engaging portions are formed at set intervals on the first operating rod, and the first switching member The first engaging portion is provided with a detachable first engaging portion, and the first engaging portion is engaged with the first engaging portion in the locked state of the first length adjusting means. The first locking portion is disengaged from the first engaging portion by unlocking the first length adjusting means.

  In this first telescopic operating device, the first length adjusting means locks the telescopic length of the second pipe relative to the first pipe, that is, between the fully closed position of the operating lever and the position immediately before the fully opened position. The first switching member is biased via the first switching rod by the biasing force of the one biasing means, and the first locking portion of the first switching member is engaged with the first engagement portion of the first operating rod. State is maintained. In this state, when the connecting rod is operated in the front-rear direction in accordance with the opening / closing operation of the operation lever, the first switching rod resists the urging force of the first urging means via the first switching member. The first operating rod is operated in the front-rear direction against the urging force of the second urging means via the first switching member, and the back-and-forth movement of the first operating rod is applied to the operated member. As a result, the operated member is operated.

  On the other hand, in the state where the lock of the expansion / contraction length of the second pipe with respect to the first pipe is released by the first length adjusting means, the operating lever is rotated to the fully open position and the second force is applied by the urging force of the first urging means. The pipe protrudes from the first pipe, the first switching member is operated via the first switching rod, the first locking portion of the first switching member is disengaged from the first engaging portion of the first operating rod, The expansion / contraction length of the two pipes can be adjusted.

  In the first telescopic operation device, the first holder can be omitted as compared with the telescopic operation device described in Patent Document 2. In addition, since the first urging means corresponding to the first switching urging means described in Patent Document 2 can be arranged on the base end side of the first pipe, a plurality of members constituting the first operating force transmission means are first The pipes can be distributed in the length direction, and the diameter of the first pipe can be reduced. For this reason, the manufacturing cost of the telescopic operation device can be reduced, and it is easy to grasp with a hand, has excellent handling properties, and can realize a lightweight telescopic operation device. In addition, the operation lever is operated from the position immediately before opening to the fully opened position against the urging force of the first urging means for urging the first switching member by the spring member that constantly urges the operating lever toward the open position. Since it is not necessary, it is possible to employ a spring member having a small operating resistance, and it is possible to easily operate even an elderly person or a child having a weak grip. In addition, when changing the expansion / contraction length of the second pipe, the first locking portion of the first switching member is released from the first engagement portion of the first operating rod by releasing the lock of the first length adjusting means. The first length adjusting means is maintained in the locked state and the engagement between the first engaging portion and the second engaging portion is maintained when the operation lever is opened and closed to cut the branch or the like. Thus, the operation stability of the operation lever opening / closing operation and the pipe expansion / contraction length adjusting operation can be greatly improved.

A second telescopic operation device according to the present invention is the first telescopic operation device, wherein the second pipe is provided with a third pipe that is telescopically fitted and is relatively non-rotatable, and the third pipe is connected to the second pipe. A second length adjusting means is provided for locking the telescopic length so as to be adjustable at set intervals, the operated member is provided at the tip of the third pipe instead of the second pipe, and the operating force of the operating lever is set to the first operation. Extending / contracting operation in which a second operating force transmitting means for transmitting to the operated member is provided in cooperation with the force transmitting means, and the tip of the first operating rod is connected to the second operating force transmitting means instead of the operated member In the apparatus, the second length adjusting means includes second adjusting holes formed in the third pipe at set intervals in the length direction, and a second attachment member fixed to a tip portion of the second pipe. A second adjustment lever rotatably provided on the second mounting member; A second adjustment pin provided on a second adjustment lever for restricting the movement of the second pipe in the length direction relative to the third pipe through the second adjustment hole, and the second adjustment pin serving as the second adjustment hole Second lever biasing means for biasing the second adjustment lever so as to be fitted,
The second operating force transmission means is movably mounted in the vicinity of the tip of the second pipe, and a second holder connected to the tip of the first operating rod, and a pivot pivotably connected to the second holder. A second switching member that is supported, a second operation rod having a tip portion connected to the operated member, and a middle portion inserted through the second holder, and a second operation at set intervals corresponding to the second adjustment hole. A second engagement portion formed of a notch or an engagement protrusion, formed on the rod, a second locking portion provided on the second switching member so as to be unevenly fitted to the second engagement portion, A second switching biasing means for biasing the second switching member so that the second engagement portion is disengaged from the second locking portion; and a lower end portion of the second adjustment pin protruding into the third pipe. Then, the second switching member is operated so that the second locking portion engages with the second engagement portion. Those having an operating surface provided on the member.

  In the second telescopic operation device, as in the first telescopic operation device, the first urging means is applied by releasing the engagement between the first pipe and the second pipe by the first length adjusting means. Due to the force, the second pipe protrudes by the gap between the first restricting portion and the base end portion of the first pipe, the first locking portion is released from the first engaging portion, and the operation lever is rotated to the fully open position. Thus, the extension length of the second pipe relative to the first pipe can be adjusted. Further, the extension length of the third pipe relative to the second pipe can be adjusted by operating the second adjustment lever of the second length adjusting means and extracting the second adjustment pin from the second adjustment hole. Further, when the length of the third pipe relative to the second pipe is adjusted and the second adjustment pin is fitted into the desired second adjustment hole, the operation surface of the second switching member is pressed by the second adjustment pin. The second locking portion is engaged with the second engaging portion of the second operating rod formed corresponding to the second adjustment hole, and the operating lever is held at the position immediately before full opening.

  On the other hand, the operation surface of the second adjustment lever is always pushed by the second adjustment pin when the second adjustment lever is not operated, and the second locking portion is always engaged with the second engagement portion. Therefore, when the operating lever is closed from the position immediately before full opening, the first operating rod and the second operating rod move together with the connecting rod to the distal end side or the proximal end side in conjunction with the opening / closing operation of the operating lever, and the operated member Will be operated.

  Here, at the position immediately before the operation lever is fully opened, the second restricting portion is locked by the proximal end portion of the second pipe, but a gap is formed between the first restricting portion and the proximal end portion of the first pipe. Then, by releasing the lock of the first length adjusting means, the switching rod, the first switching member, and the connecting rod are moved by the first biasing means until the first restricting portion engages with the proximal end portion of the first pipe. And the second pipe moves slightly toward the tip side, the first locking portion of the first switching member is disengaged from the first engaging portion of the first operating rod, and the expansion / contraction length of the second pipe is increased. A preferred embodiment is configured to be adjustable. With this configuration, the second pipe protrudes from the first pipe through the first switching rod, the first switching member, and the first operating rod by an amount corresponding to the gap between the first restriction portion and the base end portion of the first pipe. However, since the expansion / contraction length of the second pipe relative to the first pipe is restricted by the first length adjusting means, the movement of the second pipe in the protruding direction is restricted, and the operation lever is immediately before fully opened. Will be held in position. For this reason, in order to switch the expansion / contraction length of the second pipe, when the engagement of the second pipe with the first pipe is released by the first length adjusting means, the second pipe is moved by the first urging means by the gap. The first switching member projects from the first pipe, the first switching member is operated via the first switching rod, the first locking portion of the first switching member is disengaged from the first engaging portion of the first operating rod, and the second pipe The extension / contraction length can be adjusted. That is, when the lock of the first length adjusting means is released and the expansion / contraction length of the second pipe is changed, the first locking portion of the first switching member is detached from the first engagement portion of the first operating rod. However, when the first length adjusting means is locked, the engagement between the first engaging portion and the second engaging portion is maintained, so that the opening / closing operation of the operation lever and the pipe The operational stability of the adjustment operation of the expansion / contraction length can be greatly improved.

  As the first switching member, a member made of a plate-like member that is movable in the front-rear direction along the first operating rod is used, and a first locking portion that can be engaged with and disengaged from the first engaging portion of the first operating rod is provided. Provided at the distal end portion of the first switching member, the distal end portion of the switching rod is rotatably connected to the middle portion of the first switching member, and the distal end portion of the connecting rod is rotated to the proximal end portion of the first switching member. It is a preferred embodiment to connect freely. In this case, the 1st switching member of a simple structure which consists of a plate-shaped member as a 1st switching member is employable. In addition, the first locking member provided on the first switching member is turned to the first locking portion of the first operating rod from the side by the rotation of the first switching member around the tip of the connecting rod or the switching rod. It is possible to engage with and disengage from each other, and it is possible to improve the operational stability of the first switching member while reducing the number of components of the first operating force transmission means.

  In the preferred embodiment, the first switching member is made of a plate-like member having a U-shaped cross-section that is slidably fitted along the first operating rod. By using the first switching member having such a configuration, the first locking portion of the first switching member is engaged with and disengaged from the first engaging portion of the first operating rod while reducing the manufacturing cost of the first switching member. It is possible to face each other as reliably as possible.

  It is preferable that the operated member is a movable blade. With this configuration, it is possible to realize a high-edged ridge that is lightweight, small in diameter, excellent in operability, and has a small number of parts and can be manufactured at low cost.

  According to the first and second telescopic operation devices according to the present invention, the first holder can be omitted. Further, since the first urging means can be arranged on the base end side of the first pipe, a plurality of members constituting the first operating force transmission means can be distributed and arranged in the length direction of the first pipe. The diameter of one pipe can be made small. For this reason, the manufacturing cost of the telescopic operation device can be reduced, and it is easy to grasp with a hand, has excellent handling properties, and can realize a lightweight telescopic operation device. In addition, the operation lever is operated from the position immediately before opening to the fully opened position against the urging force of the first urging means for urging the first switching member by the spring member that constantly urges the operating lever toward the open position. Since it is not necessary, it is possible to employ a spring member having a small operating resistance, and it is possible to easily operate even an elderly person or a child having a weak grip. In addition, when changing the expansion / contraction length of the second pipe, the first locking portion of the first switching member is released from the first engagement portion of the first operating rod by releasing the lock of the first length adjusting means. The first length adjusting means is maintained in the locked state and the engagement between the first engaging portion and the second engaging portion is maintained when the operation lever is opened and closed to cut the branch or the like. Thus, the operation stability of the operation lever opening / closing operation and the pipe expansion / contraction length adjusting operation can be greatly improved.

Perspective view of Takaeda-an The principal part perspective view of the 1st and 2nd operating force transmission means Side view of main part of first and second operating force transmission means Exploded perspective view of the fixture The disassembled perspective view of the principal part by the side of the front-end | tip part of a 1st operating force transmission means The exploded perspective view of the principal part by the side of the base end part of the 1st operation force transmission means Longitudinal sectional view of the tool, the first and second length adjusting means, and the first and second operating force transmission means in a state where the operation lever is held at the position immediately before full opening. Longitudinal sectional view of the tool, the first and second length adjusting means, and the first and second operating force transmission means in a state where the operation lever is fully closed Longitudinal sectional view of the tool, the first and second length adjusting means, and the first and second operating force transmitting means in a state in which the second length adjusting means is operated. Longitudinal sectional view of the operating lever, first length adjusting means and first operating force transmitting means at the position immediately before full opening A longitudinal sectional view of the operating lever, the first length adjusting means and the first operating force transmitting means in the fully closed position Vertical sectional view of the operating lever, first length adjusting means and first operating force transmitting means in the fully open position

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, the telescopic operation device according to the present invention is applied to the Takaeda fence 1. In this embodiment, description will be made by defining front, rear, left and right with reference to an operator who operates the Takaeda fence 1.
As shown in FIG. 1 to FIG. 3, the Takaeda 1 is extendable to the first pipe 2, the second pipe 3 that is telescopically fitted to the first pipe 2 and is relatively non-rotatable, and the second pipe 3. A third pipe 4 fitted in such a manner that it cannot rotate relative to the first pipe 2; a first length adjusting means 20 that locks the extension length of the second pipe 3 with respect to the first pipe 2 so as to be adjustable at set intervals; A second length adjusting means 30 that locks the length of expansion / contraction of the third pipe 4 with respect to 3 in an adjustable manner, and an operation lever 5 provided at the rear end (base end) of the first pipe 2; A hook 10 provided at the front end (tip) of the third pipe 4, and a first operating force transmission means 40 and a second operating force transmission means 60 that transmit the opening / closing operation force of the operation lever 5 to the jig 10. I have.

  The first pipe 2, the second pipe 3, and the third pipe 4 are formed of a hollow pipe-shaped member having a substantially circular cross section manufactured using a light alloy such as an aluminum alloy or a synthetic resin material. The second pipe 3 and the third pipe 4 are formed with one or more vertical grooves (not shown) extending in the longitudinal direction, and the second pipe 3 and the third pipe 4 are fitted to each other. By doing so, they are fitted so as not to rotate relative to each other. The first pipe 2 is not provided with a vertical groove in order to improve handling and design, and instead of the vertical groove, the first pipe 2 is provided on the inner surface of the first mounting member 22 that is fitted and fixed to the front end portion of the first pipe 2. By forming a projection (not shown) that fits into the longitudinal groove of the second pipe 3, the second pipe 3 is fitted so as not to rotate relative to the second pipe 3.

  As shown in FIGS. 1 and 10 to 12, a fixed grip 6 extending rearward is provided at the rear end portion of the first pipe 2, and the operation lever 5 is disposed below the fixed grip 6. 6 is supported so as to be openable and closable around a shaft member 7 in the left-right direction that passes through the middle portion of 6. The shaft member 7 is provided with a lever biasing means 8 made of a torsion spring, and the operation lever 5 is always biased in the fully open direction by the lever biasing means 8.

  The fixture 10 will be described. As shown in FIGS. 1, 4, and 7 to 9, a fixed receiving member 11 that extends forward is fitted into the front end portion of the third pipe 4. A bracket portion 12 protruding upward is formed on the portion. A movable blade 14 is pivotally supported on the bracket portion 12 about a pivot shaft 13 in the left-right direction, and a fixed receiver that receives the blade portion 15 of the movable blade 14 from below on a front portion of the fixed receiving member 11. A portion 16 is formed, and an operated portion 17 extending downward is formed at the rear portion of the movable blade 14. In this tool 10, the movable blade 14 is rotated about the pivot shaft 13 by operating the operated portion 17 in the front-rear direction, and between the blade portion 15 of the movable blade 14 and the fixed receiving portion 16. The posture is switched between an open posture in which an object to be cut such as a branch can be inserted and a cutting posture in which the blade portion 15 of the movable blade 14 is received by the fixed receiving portion 16. A cover member 18 is externally mounted on the movable blade 14, and this cover member 18 is urged in a direction that always covers the movable blade 14 by a spring member 19 that is externally mounted on the pivot shaft 13, when cutting an object to be cut such as a branch. In this configuration, the object to be cut is held between the cover member 18 and the fixed receiving portion 16, and the cut object can be safely moved to a low position. However, as the fixture 10, it is possible to adopt a general configuration having a fixed blade and a movable blade.

  The first length adjusting means 20 will be described. As shown in FIGS. 7 to 12, first adjustment holes 21 are formed on the upper surface of the second pipe 3 at set intervals in the length direction. A first attachment member 22 is fitted and fixed to the front end of the first attachment member 22, and a first adjustment lever 24 is rotatably supported around the pivot pin 23 in the left-right direction on the upper portion of the first attachment member 22. A first adjustment pin 25 that can be inserted through the first adjustment hole 21 is pivotally supported by a pin member 26 at a front end portion of the first adjustment lever 24, and a first lever urging means 27 including a torsion spring is supported on the pivot pin 23. The first adjustment lever 24 is urged by the first lever urging means 27 in the direction in which the first adjustment pin 25 is always fitted in the first adjustment hole 21. Then, as shown in FIG. 12, the first adjustment pin 25 is disengaged from the first adjustment hole 21 by pushing the rear end side of the first adjustment lever 24 toward the first pipe 2. The extension length of the second pipe 3 with respect to the first pipe 2 can be adjusted, and the first adjustment pin 25 is fitted into the desired first adjustment hole 21 as shown in FIG. The extension length of the second pipe 3 can be locked.

  The second length adjusting means 30 will be described. As shown in FIGS. 7 to 9, second adjustment holes 31 are formed on the upper surface of the third pipe 4 at set intervals in the length direction. A second mounting member 32 is fitted and fixed to the front end of the second mounting member 32, and a second adjustment lever 34 is rotatably supported around the pivot pin 33 in the left-right direction on the upper portion of the second mounting member 32. A second adjustment pin 35 that can be inserted through the second adjustment hole 31 is pivotally supported by a pin member 36 at the front end portion of the second adjustment lever 34, and a second lever urging means 37 made of a torsion spring is supported on the pivot pin 33. The second adjustment lever 34 is urged by the second lever urging means 37 in a direction in which the second adjustment pin 35 is always fitted in the second adjustment hole 31. Then, as shown in FIG. 9, the second adjustment pin 35 is disengaged from the second adjustment hole 31 by pushing the rear end side of the second adjustment lever 34 toward the second pipe 3. The extension length of the third pipe 4 with respect to the second pipe 3 can be adjusted, and the second adjustment pin 35 is fitted into the desired second adjustment hole 31 as shown in FIG. The extension length of the third pipe 4 can be locked.

  As shown in FIGS. 2, 3, and 5 to 12, the first operating force transmission means 40 includes a first fixing member 41 fixed to the rear end portion of the first pipe 2 and a rear end of the second pipe 3. The first fixing member 41 is engaged with the first fixing member 41 by the second fixing member 42 fixed to the portion and the switching rod 43 provided in the first pipe 2. The movement toward the distal end side of the first pipe 2 is restricted, and the first urging means 45 provided at the proximal end side portion is constantly urged toward the distal end side of the first pipe 2, and the urging force of the first urging means 45 is applied. A switching rod 43 that can move against the first pipe 2 proximal side, a first switching member 46 connected to the distal end of the switching rod 43 so as to be disposed in the distal end of the first pipe 2, 1 a connecting rod 47 for connecting the switching member 46 and the operating lever 5, and a first operating rod 48 built in the second pipe 3. Thus, the second restricting portion 49 provided at the base end portion is engaged with the base end portion of the second pipe 3, so that the movement toward the tip end side of the second pipe 3 is restricted and provided at the base end side portion. The second urging means 50 is always urged toward the distal end side of the second pipe 3 and can move to the second pipe 3 proximal side against the urging force of the second urging means 50, and the distal end portion can be moved. A first operating rod 48 that is connected to the operated portion 17 and that is arranged so that a midway portion thereof faces the first switching member 46 is provided.

  The switching rod 43 is composed of a metal rod-like member that is internally provided from the front end portion to the rear end portion of the first pipe 2, and the middle portion of the switching rod 43 extends rearward through the second fixing member 42, In the vicinity of the rear end of the switching rod 43, a flange 43a is formed. Between the first fixing member 41 and the flange 43a, the switching rod 43 is provided with a first urging means 45 made of a compression coil spring, and the switching rod 43 is constantly urged forward by the first urging means 45. ing. A rear end portion of the switching rod 43 penetrates the first fixing member 41 and protrudes rearward. A first restricting portion 44 that restricts the forward movement of the switching rod 43 is screwed to the rear end portion of the switching rod 43. Then, the most restricting position of the switching rod 43 is restricted by the first restricting portion 44.

  The first operating rod 48 is composed of a long metal strip, and a first engaging portion 51 formed of a rectangular groove-like notch is set on the upper portion of the first operating rod 48 in the same setting as the first adjustment hole 21. It is formed at intervals. A connecting rod 52 is fixed to the rear end portion of the first operating rod 48, and the connecting rod 52 extends rearwardly through the second fixing member 42, and the connecting rod 52 is provided with a second biasing force comprising a compression coil spring. The means 50 is externally mounted, and the first operating rod 48 is always urged forward by the second urging means 50. A second restricting portion 49 made of a nut member that engages with the second fixing member 42 is screwed to the rear end portion of the connecting rod 52, and the most advanced position of the first operating rod 48 is restricted by the second restricting portion 49. ing.

  The first switching member 46 is formed in an inverted U-shaped cross section from a pair of left and right side wall portions 46a and a connecting portion 46b that connects the upper half of the front half, and has a side surface elongated in the front-rear direction with both front and rear ends directed obliquely downward. It is formed in the shape of a rough shape. A left and right guide pin 53 is provided at a lower portion of the middle portion of the first switching member 46, and a first operating rod 48 is disposed above the guide pin 53 between the pair of left and right side wall portions 46 a of the first switching member 46. It is inserted and supported so as to be movable in the front-rear direction. On the upper side of the first operating rod 48, the switching rod 43 is pivotally connected to the upper part of the middle portion of the first switching member 46 via a pin member 54 in the left-right direction, and below the first operating rod 48. The rear end portion of the connecting rod 47 is connected to the rear end portion of the first switching member 46 via a pin member 55 in the left-right direction. A first locking portion 56 made of a square bar piece is provided in a erected shape at the front end portions of the left and right side wall portions 46a of the first switching member 46, and a middle portion of the first locking portion 56 is a first engaging portion. 51 is configured so that it can be engaged and disengaged with respect to 51. However, as the 1st latching | locking part 56, what consists of a round bar piece or a plate-shaped piece is also employable. Further, a protrusion may be formed on the first operating rod 48 as the first engaging portion 51, and a concave portion that fits the protrusion on the first switching member 46 may be formed as the first locking portion 56.

  The first length adjusting means 20 regulates the expansion / contraction length of the second pipe 3 relative to the first pipe 2, and the second length adjustment means 30 determines the expansion / contraction length of the third pipe 4 relative to the second pipe 3. In the restricted state, as shown in FIG. 10, the second urging means 50 engages the second restricting portion 49 with the second fixing member 42, and the first operating rod 48 is positioned at the most advanced position. However, the 1st control part 44 is arrange | positioned with the fixed clearance G from the 1st fixing member 41, and the switching rod 43 is hold | maintained in the position immediately before the most advanced position. At this time, the first switching member 46 is pushed forward through the switching rod 43 by the biasing force of the first biasing means 45, and the first switching member is centered on the pin member 55 at the front end of the connecting rod 47. As a result, the first locking portion 56 is held in a state of being engaged with the first engaging portion 51 of the first operating rod 48. At this time, the operation lever 5 is held at the position immediately before full opening.

  On the other hand, when the first length adjusting means 20 is released, the switching rod 43, the first switching member 46, and the first operating rod 48 are moved by the urging force of the first urging means 45 as shown in FIG. The second pipe 3 moves forward by a gap G between the first restricting portion 44 and the first fixing member 41 with respect to the first pipe 2 via the second restricting portion 49, and the first switching member 46 is The first locking portion 56 of the first switching member 46 is disengaged from the first engaging portion 51 of the first operating rod 48 by rotating about the pin member 55 at the distal end portion of the connecting rod 47, and the first The expansion / contraction length of the second pipe 3 with respect to the pipe 2 can be adjusted. Further, when the first adjustment pin 25 of the first length adjusting means 20 is inserted into the first adjustment hole 21 of the second pipe 3 at a desired position, the first locking portion 56 of the first switching member 46 is the gap G. When the operation lever 5 is closed in this state, the first switching member 46 is moved rearward together with the connecting rod 47. At the same time, the first urging means 45 is compressed, the urging force of the first urging means 45 causes the first locking portion 56 to be pressed against the upper surface of the first operating rod 48, and the first restricting portion 44 is When the first fixing member 41 moves backward by the gap G, the first locking portion 56 engages with the first engaging portion 51 and the first operating force transmission means 40 is connected. .

  As shown in FIGS. 2, 3, and 7 to 9, the second operating force transmission means 60 is a second body that is movably housed in the vicinity of the front end portion of the second pipe 3 via the first operating rod 48. A holder 61, a second switching member 62 pivotally supported by the second holder 61, a front end portion is connected to the operated portion 17 of the movable blade 14, and a middle portion is inserted through the second holder 61. 2 operating rods 63, second engaging portions 64 made of notches or engaging projections, formed on the second operating rod 63 at set intervals corresponding to the second adjustment holes 31, and second engaging portions The second switching portion 65 provided at the rear end portion of the second switching member 62 and the second switching portion so that the second engagement portion 64 is disengaged from the second locking portion 65 so as to fit the concave and convex portions 64. The second switching urging means 66 for urging the member 62 and the lower end of the second adjustment pin 35 protruding into the third pipe 4 are in contact with each other. The second switching member 62 is operated so that the locking portion 65 engages with the second engaging portion 64, and an operation surface 67 provided on the second switching member 62 so as to face the second adjustment pin 35 is provided. Yes. As shown in FIG. 7, the first operating rod 48 can be connected to the second holder 61 via the second switching member 62, but can also be directly connected to the second holder 61. Is possible.

  The second operating rod 63 is formed of a long metal strip, and a second engaging portion 64 formed of a square groove-like notch is set on the upper portion of the second operating rod 63 in the same setting as the second adjustment hole 31. The front end portion of the second operating rod 63 is connected to the operated portion 17 of the movable blade 14 via the connecting member 70.

  The second holder 61 is provided with a pair of left and right side wall portions 71. Between the lower portions of the left and right side wall portions 71 of the second holder 61, two guide pins 72 and one pivot pin 73 are arranged in the front-rear direction. It is provided at intervals. A second switching member 62 extending forward is pivotally supported on the pivot pin 73, and a screw that constantly biases the second switching member 62 toward the separation side shown in FIG. A second switching urging means 66 comprising a spring is fitted on the outside. A front end portion of the first operating rod 48 is rotatably connected to a middle portion of a connecting pin 74 provided at a rear end portion of the second switching member 62, and the second holder 61 is connected to the second switching member 62 via the second switching member 62. One operating rod 48 is connected. The second operating rod 63 is inserted into the second holder 61 so as to be movable only in the front-rear direction by the front and rear guide pins 72, the pivot pins 73, and the connecting pins 74 between the left and right side wall portions 71.

  The second switching member 62 is formed in an inverted U-shaped cross section from a pair of left and right side wall portions 62a and a connecting portion 62b that connects the upper half of the first half, and a second long member is formed on the upper surface of the connecting portion 62b of the second switching member 62. An operation surface 67 with which the lower end of the second adjustment pin 35 of the height adjusting means 30 abuts is formed. A second latching portion 65 made of a square bar piece is provided in the middle of the left and right side wall portions 62a of the second switching member 62, and the middle portion of the second latching portion 65 is the second engaging portion. 64 is configured to be able to be engaged and disengaged with respect to 64. When the operation lever 5 is opened and closed, the second holder 61 moves relative to the second pipe 3 in the front-rear direction. At this time, the operation surface 67 is operated so that it always faces the second adjustment pin 35. The length of the surface 67 in the front-rear direction is set. However, as the 2nd latching | locking part 65, what consists of a round bar piece or a plate-shaped piece is also employable. In addition, a protrusion may be formed on the second operating rod 63 as the second engaging portion 64, and a concave portion that engages with the protrusion on the second switching member 62 may be formed as the second locking portion 65.

Next, the operation of the Takaeda 1 will be described.
In the first operating force transmission means 40, as shown by a solid line in FIG. 10, the first adjustment pin 25 of the first length adjustment means 20 is engaged with the first adjustment hole 21 of the second pipe 3. Then, a gap G is formed between the first restricting portion 44 and the first fixing member 41, and the operating lever 5 can only be turned to the open side up to the position immediately before full opening, and the first locking portion of the first switching member 46 56 is always engaged with the first engaging portion 51 of the first operating rod 48, and resists the urging forces of the first urging means 45 and the second urging means 50 as the operation lever 5 is opened and closed. Thus, the connecting rod 47, the first switching member 46, the first operating rod 48, and the switching rod 43 are integrally moved in the front-rear direction.

  Further, in the second operating force transmission means 60, as the first operating rod 48 moves back and forth, the second holder 61 and the second switching member 62 are moved to the first operating rod 48 as shown in FIGS. However, since the operation surface 67 of the second switching member 62 is always pushed by the second adjustment pin 35, the second locking portion 65 is always in contact with the second engagement portion 64. The engaged state is maintained, and the second operating rod 63 moves in the front-rear direction together with the first operating rod 48 in conjunction with the opening / closing operation of the operating lever 5. For this reason, when the operation lever 5 is closed, the first and second operation rods 48 and 63 are retracted and the movable blade 14 is closed, and when the operation lever 5 is opened, the first and second operation rods 48 and 63 are operated. Advances and the movable blade 14 is opened.

  On the other hand, when the extension length of the second pipe 3 with respect to the first pipe 2 is adjusted, the first adjustment lever 24 of the first length adjusting means 20 is operated to adjust the first adjustment as shown in FIG. The pin 25 is removed from the first adjustment hole 21. At this time, the urging force of the first urging means 45 moves the second pipe 3 forward relative to the first pipe 2 by the gap G between the first restricting portion 44 and the first fixing member 41, The first switching member 46 rotates around the pin member 55 at the tip of the connecting rod 47, the first locking portion 56 is disengaged from the first engaging portion 51, and the operation lever 5 is rotated to the fully open position. . In this state, the length of the second pipe 3 is adjusted, the first adjustment pin 25 is engaged with the first adjustment hole 21 at the desired position, and both the pipes 2 and 3 are locked to the desired extension length. Will do. However, the first locking portion 56 is not engaged with the first engaging portion 51 simply by being locked. When the operation lever 5 is closed, the first urging means 45 applies the urging force. The first locking portion 56 of the first switching member 46 moves forward while being pressed against the upper side of the first operating rod 48, engages with the first engaging portion 51 on the front side, and the first operating force transmission means 40 will be connected.

  Further, when adjusting the extension length of the third pipe 4 with respect to the second pipe 3, as shown in FIG. 9, the second adjustment lever 34 is operated to connect the second adjustment pin 35 to the second adjustment hole 31. At this time, the second switching member 62 pressed by the second adjustment pin 35 is rotated by the second switching urging means 66, and the second locking portion 65 is moved to the second engaging portion. Depart from 64. With the second locking portion 65 thus detached from the second engaging portion 64, the length of the third pipe 4 relative to the second pipe 3 is adjusted, and the second adjustment pin 35 is moved to the desired second adjustment hole. The pipes 3 and 4 can be locked to a desired extension length. At this time, the operation surface 67 of the second switching member 62 is pressed by the second adjustment pin 35, and the second engagement portion 64 of the second operation rod 63 formed corresponding to the second adjustment hole 31 is moved to the second engagement portion 64. The relative movement of the second operation rod 63 in the front-rear direction with respect to the second holder 61 is restricted so that the second locking portion 65 engages and the second operation rod 63 moves back and forth in conjunction with the operation of the operation lever 5. Is done.

  In this high branch fence 1, when the opening / closing operation of the normal jig 10 for opening and closing the operation lever 5 to cut the branch is performed, the operation lever 5 does not rotate to the fully open position shown by the solid line in FIG. Since the first locking portion 56 is not released from the first engaging portion 51 and is held at the position immediately before full opening shown by the solid line (shown by the phantom line in FIG. 12), the opening / closing operation of the operating lever 5 is stable. And certainty can be secured. Further, by operating the first adjustment lever 24, the first locking portion 56 is disengaged from the first engagement portion 51 by the biasing force of the first biasing means 45, and the operation lever 5 is rotated to the fully open position. As a result, the length of the second pipe 3 relative to the first pipe 2 is adjusted, so that the operational stability at the time of adjusting the length of the second pipe 3 can be greatly improved. Further, the number of parts of the first operating force transmission means 40 can be reduced, and the first urging means 45 is arranged on the hand side so that the number of parts of the first operating force transmission means 40 is the length of the first pipe 2. Since the first pipe 2 can be dispersedly arranged in the direction, a small-diameter and lightweight pipe that can be easily grasped can be adopted, and the handling performance of the high branch ridge 1 can be improved and the manufacturing cost can be reduced.

  In addition, although the present Example demonstrated the case where this invention was applied to the Takaashi ridge 1 which has the three pipes 2-4 which can expand-contract, the 3rd pipe 4 was abbreviate | omitted and it attached to the front-end | tip part of the 2nd pipe 3 It is also possible to configure the high-branch rod 1 having the two first and second pipes 2 and 3 by providing the jig 10 and connecting the first operation rod 48 to the operated portion 17 of the movable blade 14. is there.

  Further, in the present embodiment, the case where the present invention is applied to the Takaeda scissors 1 having the scissors 10 attached to the distal end portion has been described, but the present invention is also applied to a manipulator or the like in which grippers are attached instead of the scissors 10. The invention is equally applicable.

DESCRIPTION OF SYMBOLS 1 Takae ridge 2 1st pipe 3 2nd pipe 4 3rd pipe 5 Operation lever 6 Fixed grip 7 Shaft member 8 Lever urging means 10 Fitting 11 Fixed receiving member 12 Bracket part 13 Pivoting shaft 14 Movable blade 15 Blade part 16 Fixed receiving portion 17 Operated portion 18 Cover member 19 Spring member 20 First length adjusting means 21 First adjusting hole 22 First mounting member 23 Pivoting pin 24 First adjusting lever 25 First adjusting pin 26 Pin member 27 First Lever biasing means 30 Second length adjusting means 31 Second adjustment hole 32 Second mounting member 33 Pivoting pin 34 Second adjustment lever 35 Second adjustment pin 36 Pin member 37 Second lever biasing means 40 First operating force Transmission means 41 First fixing member 42 Second fixing member 43 Switching rod 43a collar 44 First restricting portion 45 First urging means 46 First switching member 46a Side wall portion 46b Connecting portion 47 Connecting rod 48 First operating rod 49 Second restricting portion 50 Second urging means 51 First engaging portion 52 Connecting rod 53 Guide pin 54 Pin member 55 Pin member 56 First locking portion 60 Second operating force transmitting means 61 2nd holder 62 2nd switching member 62a Side wall part 62b Connection part 63 2nd operation rod 64 2nd engagement part 65 2nd latching | locking part 66 2nd switching urging means 67 Operation surface 70 Connection member 71 Side wall part 72 Guide pin 73 pivot pin 74 connecting pin

Claims (6)

A first length adjusting means for locking the second pipe to the first pipe so that the second pipe can be extended and contracted and cannot be relatively rotated, and the extension length of the second pipe relative to the first pipe can be adjusted at set intervals; A telescopic operation device having a first operating force transmitting means for transmitting an operating force of an operating lever provided at a proximal end portion of a first pipe to an operated member provided at a distal end portion of a second pipe,
The first operating force transmission means includes
A switching rod incorporated in the first pipe, the movement of the first pipe toward the tip end side of the first pipe is restricted by the first restricting portion, and is always urged toward the tip end side of the first pipe by the first urging means. A switching rod movable to the first pipe proximal end side against the biasing force of the biasing means;
A first switching member coupled to the tip of the switching rod so as to be disposed within the tip of the first pipe;
A connecting rod for connecting the first switching member and the operating lever;
The first operating rod built in the second pipe, the movement to the tip end side of the second pipe is restricted by the second restricting portion, is always urged to the tip end side of the second pipe by the second urging means, It is movable to the second pipe proximal end side against the urging force of the second urging means, and the distal end portion is connected to the operated member, and the midway portion is arranged to face the first switching member. A first operating rod;
The first operating rod is formed at set intervals, and the first switching member is provided with a first locking portion that can be engaged with and disengaged from the first engaging portion. In the locked state of the length adjusting means, the state in which the first engaging portion is engaged with the first engaging portion is maintained, and the first engaging portion is engaged in the first engagement by unlocking the first length adjusting means. Leave the club,
A telescopic operation device characterized by that. 2. The telescopic operation device according to claim 1, wherein the second pipe is provided with a third pipe that is telescopically and non-rotatably fitted, and the telescopic length of the third pipe relative to the second pipe can be adjusted at set intervals. A second length adjusting means for locking to the second pipe, the operated member is provided at the tip of the third pipe instead of the second pipe, and the operating force of the operating lever is cooperated with the first operating force transmitting means. A telescopic operation device provided with second operating force transmission means for transmitting to the operating member, wherein the tip of the first operating rod is connected to the second operating force transmitting means instead of the operated member;
The second length adjusting means is
Second adjustment holes formed in the third pipe at set intervals in the length direction;
A second mounting member fixed to the tip of the second pipe;
A second adjustment lever rotatably provided on the second mounting member;
A second adjustment pin provided on a second adjustment lever for restricting movement of the second pipe in the length direction relative to the third pipe through the second adjustment hole;
Second lever biasing means for biasing the second adjustment lever so that the second adjustment pin fits into the second adjustment hole;
The second operating force transmission means includes
A second holder that is movably mounted near the tip of the second pipe and connected to the tip of the first operating rod;
A second switching member pivotally supported by the second holder;
A second operating rod having a distal end connected to the operated member and an intermediate portion inserted through the second holder;
A second engagement portion formed of a notch portion or an engagement protrusion, which is formed in the second operation rod at a set interval corresponding to the second adjustment hole;
A second locking portion provided on the second switching member so as to fit the concave and convex portions on the second engaging portion;
Second switching urging means for urging the second switching member so that the second engaging portion is disengaged from the second locking portion;
A second adjustment pin that contacts the lower end of the second adjustment pin protruding into the third pipe and operates the second switching member so that the second locking portion engages with the second engagement portion. And an operation surface provided on the second switching member so as to face each other,
A telescopic operation device characterized by that.   The second restricting portion is locked at the base end portion of the second pipe at a position immediately before the operation lever is fully opened, but a gap is formed between the first restricting portion and the base end portion of the first pipe, By releasing the lock of the one length adjusting means, the first biasing means causes the switching rod, the first switching member, and the connecting rod to pass through until the first restricting portion engages with the proximal end portion of the first pipe. Thus, the second pipe moves slightly toward the tip side, and the first locking portion of the first switching member is disengaged from the first engaging portion of the first operating rod, so that the expansion / contraction length of the second pipe can be adjusted. The expansion / contraction operation device according to claim 1 or 2.   As the first switching member, a member made of a plate-like member that is movable along the first operating rod is used, and a first locking portion that can be engaged with and disengaged from the first engaging portion of the first operating rod is first switched. Provided at the tip of the member, the tip of the switching rod is pivotally connected to the middle of the first switching member, and the tip of the connecting rod is pivotally connected to the base end of the first switching member The expansion / contraction operation device according to any one of claims 1 to 3.   The expansion / contraction operation device according to any one of claims 1 to 4, wherein the first switching member is a plate-shaped member having a U-shaped cross section that is externally fitted along the first operation rod. . The telescopic operation device according to claim 1, wherein the operated member is a movable blade of a scissors.

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