JPH028711Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a connecting member for operating rods for high-altitude work and processing tools used for cutting branches, processing kites caught on overhead wires, etc. This relates to the connection structure of.

(Prior Art) Conventionally, for example, in so-called pruning work in which twigs are cut from high places on a tree, a tool such as a pruning saw or a pruning sickle is connected to the tip of a long operating rod. There are various means for connecting and fixing the operating rod and the tool, such as screwing and pinning, which take into account the ease of attachment and detachment between the operating rod and the tool, but as described in Publication of Utility Model Publication No. 46-36133, , a cylindrical base is formed on the tool, a groove in the cylindrical base is connected with a fastening hole, a bolt is protruded and fixed to the tip of the operating rod, and the tool is fitted to the tip of the operating rod. When doing so, a commonly used connecting means is to position the bolt from the cut groove into the fixing hole, and then tighten and fix it with a stepped nut having a short shaft portion on the lower surface that can be fitted into the fixing hole. There is.

(Problem to be solved by the invention) However, in the connection structure described in the above-mentioned Japanese Utility Model Publication No. 46-36133, the stepped nut fits into the fixing hole in the cylindrical base of the tool and is tightened. This is more advantageous in preventing the tool from falling out of the operating rod during use than simply tightening with screws, but it is inevitable that the stepped nut will loosen during operation. If you continue to work for a long time without knowing that the nut is loose, the nut will gradually loosen and the short shaft at the bottom of the nut will eventually slip out of the tool's retaining hole, causing the tool to suddenly detach from the operating rod. This may lead to unexpected accidents.

The present invention was made with the aim of preventing the nuts from loosening in the above-mentioned connection structure.

(Means for Solving the Problems) The connecting structure of the operating rod for high-place work and various tools, etc. according to the present invention has a cylindrical base of a connecting member that is fitted and connected to the tip of the operating rod. A guide groove is provided at the end of the guide groove for introducing the bolt protruding from the operating rod, and a fixing hole is provided for the bolt protruding from the operating rod. On the bolt protruding from the rod,
A stepped round nut having a short shaft portion at its lower part that can be fitted into the fastening hole is screwed together, and a coil spring is interposed in a compressed state between the round nut and the head of the bolt to form a connecting member. The tip of the operating rod is inserted into the cylindrical base of the round nut, the bolt of the operating rod is positioned in the center of the fixing hole of the cylindrical base, and the lower short shaft of the tightened round nut is inserted into the fixing hole. The round nut is fitted into the spring and is configured to maintain a state in which the round nut is pressed by the spring.

The above-mentioned connection structure of the present invention can be applied not only to tools for working at heights such as pruning saws, pruning sickles, and kite catching tools hooked to overhead wires, but also to connection of replenishment rods.

(Function) The stepped round nut with the connecting structure of the present invention has its lower short shaft portion fitted into the fixing hole of the cylindrical base, and the lower surface of the round nut body firmly holds the connecting member toward the operating rod. Tighten to prevent the connecting member from easily coming off from the operating rod due to vibration or impact during work. Furthermore, the spring prevents the tightened round nut from loosening, and even if the round nut should become loose, it prevents the loosening from progressing and the short shaft of the round nut from slipping out of the fastening hole.
Maintain normal connection for a long time.

(Embodiment) An embodiment of the present invention in which a pruning saw is shown as a connecting member connected to an operating rod will be described below.As shown in FIG. The cylindrical base 2 is provided with an L-shaped guide groove 5 whose starting end is the opening edge of the base 2.
A circular fastening hole 6 is formed at the end of the hole. A bolt 8 having a head 7 is fixed to the tip 4 of the operating rod 3 with its threaded shaft protruding by about 20 mm, and the protruding threaded shaft can be fitted into the fixing hole 6. The short shaft portion 9 which has a diameter and is slightly smaller in height than the wall thickness of the cylindrical base portion 2 and the fixing hole 6 also have a large diameter and have a concave portion 10 in the center of the upper surface side.
A stepped round nut 11 is screwed together, and between the round nut 11 and the head 7 of the bolt, the length when no load is applied is slightly larger than the protruding length of the threaded shaft portion of the bolt 8. A coil spring 12 is interposed in a compressed state. The pruning saw 1 is attached and fixed to the tip 4 of the operating rod 3 in the following manner. First, the round nut 11 is rotated in the loosening direction and moved to the head 7 side of the bolt 8 against the elasticity of the spring 12, and then the cylindrical base 2 of the pruning saw 1 is fitted to the tip 4 of the operating rod 3. After guiding the threaded shaft of the bolt 8 into the guide groove 5 while
Alternatively, rotate either one of the pruning saws 1 slightly and insert the bolt 8 into the fixing hole 6 of the cylindrical base 2 of the pruning saw 1.
(see Figure 3). After that, the round nut 11 is rotated in the tightening direction to fit the lower short shaft portion 9 of the round nut 11 into the fastening hole 6, and is firmly tightened so that the circumference of the fastening hole 6 is secured to the round nut. The bonding is completed by pressing with the lower surface of the large diameter portion of No. 11.

The connection structure thus connected is connected to the lower short shaft portion 9 of the round nut 11 as shown in FIG.
is fitted into the fixing hole 6, and the round nut 11, which is in a tightened state, is constantly pressed by the spring 12.

Although the guide groove 5 is L-shaped in the embodiment, it goes without saying that the present invention can also be applied to a joining member having a linear guide groove.

(Effect of the invention) As described above, the connection structure between the operating rod for high-altitude work and the connecting member according to the present invention is such that the cylindrical base of the connecting member that is fitted and connected to the tip 4 of the operating rod 3, for example, a branch saw. The operating rod 3 is attached to the cylindrical base 2 of 1.
A guide groove 5 through which the bolt 8 protrudingly extends from the tip 4 of the operating rod 3 and a fastening hole 6 located at the end of the guide groove 5 are connected to each other. A stepped round nut 11 having a short shaft portion 9 at the bottom that can be fitted into the fastening hole 6 is screwed into the bolt, and a coil spring 12 is inserted between the stepped round nut 11 and the head 7 of the bolt 8. The tip 4 of the operating rod 3 is inserted into the cylindrical base 2 of the connecting member in a compressed state, and the cylindrical base 2
The bolt 8 of the operating rod 3 is positioned in the center of the fixing hole 6, and the short shaft portion 9 of the round nut 11 is tightened, and the short shaft portion 9 of the round nut 11 is fitted into the fixing hole 6. Since the connection structure is compressed by the spring 12, the operation of connecting or disconnecting the operating rod 3 with various connecting members can be easily performed as in the conventional case.
In particular, when the two are connected and fixed, the round nut 11, which performs the tightening action, is constantly pressed by the spring 12, so it is difficult for the round nut 11 to loosen, and even if it does loosen, the round nut 11 is not easily loosened. The lower short shaft portion 9 of the nut 11 hardly ever slips out of the fastening hole 6, and the safety of the tool for working at heights can be significantly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially omitted side view of the operating rod and the connecting member, and Fig. 2 is a view of the connecting part in a state where the operating rod and the connecting member are connected and fixed. A cross-sectional view, and FIG. 3 is a cross-sectional view of the connecting portion with the round nut loosened. 1 is a branch saw (joint member), 2 is a cylindrical base of the joint member, 3 is an operating rod, 4 is the tip of the operating rod, 5 is a guide groove, 6 is a fastening hole, 7 is a bolt head, 8 is a Bolt, 9 is short shaft part, 10 is recessed part, 11
is a round nut, and 12 is a spring.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical base of a connecting member that is fitted and connected to the tip of the operating rod, and a guide groove through which a bolt protruding from the tip of the operating rod can pass; Fastening holes located at the ends of the guide grooves are arranged in series, and a stepped round nut having a short shaft portion at the bottom that can be fitted into the fastening holes is screwed onto the bolt protruding from the operating rod. Further, a coil spring is interposed in a compressed state between the round nut and the head of the bolt, and the tip of the operating rod is inserted into the cylindrical base of the connecting member, and the center part of the fixing hole of the cylindrical base is inserted. An operating rod for high-place work, characterized in that the short shaft of a round nut is fitted into the fixing hole when the bolt of the operating rod is positioned and tightened, and the round nut is compressed by a spring. A connection structure between and a connecting member. (2) The connection structure between the operating rod for high-place work and the connecting member according to claim 1, wherein the connecting member is a working tool such as a branch saw, sickle, or hook. (3) A connection structure between an operating rod for high-place work and a connecting member according to claim 1 of the above-mentioned utility model registration claim, wherein the connecting member is a refilling rod.