JP2002095875A - Locking mechanism of pruning clippers and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking mechanism for pruning clippers and the like by which lock can be released by one-hand operations. SOLUTION: With respect to the pruning clippers and the like which are provided with a blade opening and force applying function at a blade opening and closing operation part (handle), the base of a hamulus 5 provided with a stopping hamulus 52 at its extremity is pivotably coupled 51 to one operating part (handle 3a). In its locking position, a force applying part 6 is provided for applying force for rotation in the direction of releasing lock and the other operating part (handle 3b) is provided with a stopping support 7 to be engaged in the stopping hamulus 52 in the locking position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention refers to harvesting scissors, bud cutting scissors, fruit cutting scissors, pear and persimmon core cutting scissors, tangerine cutting scissors, bonsai scissors, etc. which are used at the height of trees for harvesting fruits and for other purposes. More particularly, the present invention relates to a locking mechanism such as a pruning scissors to be used and a pruning scissors in which the pruning scissors are incorporated at the tip of a high-altitude operation mechanism.

[0002]

2. Description of the Related Art As one type of pruning scissors used for cutting branches of plants, scissors used for harvesting fruits, etc., are basically in the middle of ordinary scissors. With a basic structure with a blade part formed on the tip part side and a handle part provided on the base side, especially the whole is lightened,
In order to improve the operability, there is provided between the handles a spring for urging the blade in the opening direction.

[0003] With the provision of the above-mentioned ridges, it is inconvenient at the time of storage because it is left open when left unattended. For this reason, one handle is provided with an opening-stopping member, a so-called lock mechanism, which is hung on the other handle. Specifically, a flexible band (locking member) is formed in a ring shape,
Attaching to one handle, or attaching a locking member formed of an elastic material and having a U-shaped hook at the tip to one handle (Japanese Utility Model Application Laid-Open No. 59-190178). It is known that a hook-shaped hook rod (locking member) is pivotally connected to one handle, and a hook receiving portion is provided on the other handle (see Japanese Utility Model Application Laid-Open No. H05-158).
9-88029).

In the above-mentioned lock mechanism, both the locking operation and the unlocking operation are all performed by manually operating the locking member. By the way, the pruning scissors described above are often used for work at a high place, and when unlocking on a ladder or the like, holding and unlocking the scissors and operating both hands are dangerous.

Therefore, the present invention proposes a lock mechanism which can be unlocked with one hand while holding the pruning scissors.

[0006]

A locking mechanism such as pruning scissors according to the present invention crosses an intermediate portion of a pair of holding members, pivots the crossing point, forms a blade portion at a front end side, and forms a blade portion at a base side. Providing a blade part opening / closing operation part such as a handle part, and pruning scissors or the like having a blade part opening urging spring interposed between the operation parts, the base of the hook body provided with a locking hook part at the tip, While connecting to one operation unit,
In the lock position, an urging portion for turning and urging in the unlocking direction is provided, and the other operation portion is provided with a lock receiving portion for locking with the lock hook portion in the lock position. It is.

Therefore, when the hook is rotated while the operating portion is moved in the blade closing direction and the locking hook is locked to the locking receiving portion, the locking hook is engaged by the blade opening urging force. Detachment from the receiving portion is prevented, and the locked state is maintained. When using,
When the operating part in the locked state is further moved to the blade part closed state,
The locked state is released, and the locking hook moves from the locked position to the outside of the operation range of the operation unit by the urging force in the release direction, whereby the lock is released.

[0008]

Next, an embodiment of the present invention will be described. The embodiment is an example in which the present invention is applied to pruning scissors.
The main body of the pruning shears is the same as the conventional one, with two holding members in an intersecting state, the intermediate portion serving as the intersecting point is pivotally connected 1, and the blades 2a and 2b are formed on the front side and the base side is formed. Handle part 3a,
3b is provided, and a spring 4 for urging in the opening direction of the blades 2a, 2b is interposed, in particular, on the side of the pivotal connection 1 of the handles 3a, 3b.

In the above-mentioned pruning scissors, in particular, the present invention is provided with a lock mechanism on the handles 3a, 3b, and the lock mechanism comprises a hook 5, an urging portion 6, and a lock receiving portion 7. You.
The hook 5 is pivotally connected to the base of the handle 3a at the tail end thereof.
The locking hook 52 is provided at the tip. Further, a lock position (a position where the locking hook portion 52 advances toward the pivotal connection portion 1 from the movement locus A of the lock receiving portion 7 about the pivotal connection portion 1), a lock release position (outside the movement locus A) (The position at which the locking hook 52 has moved).

Specifically, a leaf spring is provided on the inner surface of the handle 3a, and the base end face 53 of the hook 5 and the leaf spring (biasing portion 6) are provided.
The shape of the base end face 53 is specified so that the lock release position is attained in the stable contact state, and the return biasing force acts at the lock position.

Further, the locking receiving portion 7 is provided at the tail end of the handle 3b. Regarding the relationship between the locking hook portion 52 and the locking receiving portion 7, the locking hook portion 52 has a locking surface 521. Are provided with a predetermined width (B-C) of the movement locus from the center of the pivot 51. That is, the hook inner surface of the locking surface 521 becomes the locus B, and the hook tip surface becomes the locus C. Further, the locking receiving portion 7 is formed by projecting the tail end of the handle portion 3b outward in the opening / closing operation direction so as to be locked with the locking surface 521.

The grips 3a, 3b are gripped, the blades 2a, 2b are closed, the tip of the locking receiving portion 7 is positioned inside the locus C, and the hook 5 is biased. When the locking hooks 52 are advanced to the trajectory A side against the urging force of the lock 6 and the grips 3a and 3b are released in this state, the locking hooks 52 and the lock receiving portions 7 are engaged. It will be in the stop state (lock state). That is, the transition of the handle 3b to the blade opening state is blocked by the locking hook 52, and the transition of the hook 5 in the release direction is blocked by the locking receiving portion. Therefore, the closed state of the blade portion is maintained similarly to the conventional lock mechanism.

In use, the handle portions 3a, 3b
When the handle 3b is shifted to the handle 3a side and the tip of the lock receiving portion 7 is set to the handle 3a side from the locus C, the hook 5
Is released, and the leading end of the locking hook 52 moves out of the locus A by the return force of the urging portion 6 and is stabilized. Therefore, handle part 3
In the stable state of the hook 5 in the unlocked state, the grips 3a, 3b
There is no hindrance to the opening and closing operation of 3b.

In the above embodiment, the pruning scissors show an example in which the lock mechanism is incorporated at the tail end of the handle. However, the present invention is not necessarily limited to the tail end of the handle, and may be provided in the middle of the handle. The urging portion is not limited to a leaf spring.

In addition to scissors other than the above-mentioned pruning scissors,
Even in the high branch cutting scissors having a long handle, the lock mechanism can be incorporated in the opening / closing operation portion of the blade portion, and even when the scissor portion is located at a high position in the locked state, the lower hand operation portion Then, when the blade opening and closing operation unit is operated in the closing method,
The lock is automatically released.

[0016]

As described above, the present invention relates to a pruning scissors or the like having a blade opening / closing operation unit (handle) having a blade opening urging function, and a hook body provided with a locking hook at the tip. The base portion is pivotally connected to one operation portion, and at the lock position, an urging portion is provided for urging the rotation in the unlocking direction, and the other operation portion is locked with the locking hook portion at the lock position. A lock mechanism such as pruning scissors with a lock receiving part.Unlocking is performed by opening and closing the blade, so one-handed unlocking is performed when working at heights, improving safety when working at heights. It is a thing.

[Brief description of the drawings]

FIG. 1 is a front view (in a locked state) of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment (in an unlocked state).

FIG. 3 is an operation explanatory view of the lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pivot part 2a, 2b Blade part 3a, 3b Handle part 4 Splash 5 Hook body 51 Pivot part 52 Locking hook part 521 Locking surface 53 Base end face 6 Leaf spring (biasing part) 7 Lock receiving part

Claims (2)

[Claims] 1. An intermediate portion of a pair of holding members intersects, the intersection is pivotally connected, a blade portion is formed at a front portion side, and a blade portion opening / closing operation portion such as a handle portion is provided at a base side, and said operation portion is provided. In a pruning scissor or the like in which a spring for urging the blade opening is interposed between the parts, the base of a hook body having a locking hook at the tip is pivotally connected to one operation unit, and in the locked position. A pruning scissors or the like, characterized in that a biasing portion for rotating and biasing in the unlocking direction is provided, and a locking receiving portion for locking the locking hook portion at the locking position is provided on the other operation portion. Lock mechanism. 2. A pruning shears in which an operation part is a handle part,
2. A lock mechanism for a pruning scissors or the like according to claim 1, wherein a hook body is provided at a tail end of one of the handle portions, and the tail end of the other handle portion serves as a lock receiving portion.