JPH10127133A - Connection device for divided clamping rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the connection device of a divided clamping rod for facilitating the operations of connection and detachment, ensuring the connection and simplifying constitution at the time of connecting the divided clamping rod in a bush cutter or the like by positioning, tightening and fixing it. SOLUTION: As a means for positioning the clamping rod, a fixed pawl 12 is formed at one end, an elastic body 13 is connected to the other end, a center part is pivotally supported by a shaft 10, a ratchet 11 provided in a slit 8 formed on a connection device main body is constituted and positioning is made possible by engaging the fixed pawl 12 to a hole 31 pierced on a gear side pipe 30 to be the clamping rod.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device for a divided gripping rod in a brush cutter or the like.

[0002]

2. Description of the Related Art In general, in a brush cutter or pruning machine for cutting weeds and tree branches, in order to contribute to the convenience of work when the weeds and tree branches as objects are remote or at high places.
As a means for connecting the engine (motor), the handle and the like with the gear and the blade (working machine) and the like, a long gripping rod (hereinafter appropriately referred to as “pipe”) having a power transmission shaft therein is used. Such a long pipe is convenient at the time of work, but it is inconvenient for packing, transporting, storing, etc. of a brush cutter or the like. The device is devised such that it can be divided.

[0003]

Here, when the long pipe is configured to be extendable and contractable, it is generally connected to the inside of a first large-diameter pipe connected to the engine side and to the gear side. The second small diameter pipes are sequentially housed, and the power transmission shafts inside the two pipes are connected by splines or the like. However, according to such a configuration, it is necessary to prepare pipes of two diameters, large and small, and the power transmission shaft is also adapted to expand and contract.
Since it is necessary to lengthen the spline of the connecting portion or to devise the connecting portion, there is a problem that the configuration becomes complicated and cost and labor are required in manufacturing.

[0004] Further, in the case where the long pipe is configured to be splittable, generally, a first pipe connected to the engine side and a second pipe connected to the gear side are formed by:
The two pipes are connected by a connection pipe having a diameter larger than that of the two pipes. After the two pipes are positioned by a positioning screw or a positioning fitting, the two pipes are tightened and fixed by a fastening screw or a fastening fitting. However, according to this configuration, although the number of parts is smaller than that of the expandable and contractable configuration and the configuration is simple, in the connection, the positioning and tightening and fixing work of each pipe as described above is required, and the connection operation is performed. There was a problem that it was troublesome.

Accordingly, in order to solve the above-mentioned problems, the long pipe is configured to be dividable so that the number of parts is small and the configuration is simple, and the connecting operation and the removing operation of both the divided pipes are easy. It is appropriate to provide a coupling device that is reliable and that can be securely attached and detached.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and as a means therefor, a gripping rod having a power transmission shaft therein is inserted from the end, and the gripping rod is inserted. What is claimed is: 1. A split gripping rod connecting device for positioning, tightening and fixing, wherein a fixing claw is formed at one end for engaging a hole formed in the gripping rod as a means for positioning the gripping rod. An elastic body for urging the fixed claw toward the hole is connected, and a central portion is pivotally supported,
It is an object of the present invention to provide a split gripping rod connecting device, comprising a ratchet provided between slits formed in the connecting device main body, and further comprising means for tightening and fixing the gripping rod.

Another aspect of the present invention is a split gripping rod connecting device, wherein a spigot portion is formed inside a connecting device body as an auxiliary means for positioning the gripping rod. A coupling device is provided.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a split gripping rod connecting device according to the present invention; FIG. Here, FIG. 1 is a perspective view of a connecting pipe constituting a connecting device for a divided gripping rod according to the present invention. FIG. 2A is a plan view showing a state in which both divided pipes are connected by using the split gripping rod connecting device according to the present invention, and FIG. It is A direction sectional drawing. FIG. 3 is a sectional view showing a state before the gear case-side pipe is positioned.

[Description of Configuration of Each Pipe] Configuration of Connection Pipe 1 (Connecting Device) First, the configuration of the connection pipe 1, which is an embodiment of the split gripping rod connecting device according to the present invention, will be described. The connection pipe 1 is configured such that a gear-side pipe 30 serving as a gripping rod having a gear-side shaft 32 serving as a power transmission shaft therein is inserted from an end thereof, and the gear-side pipe 30 is positioned, tightened, fixed and connected. Further, an engine-side pipe 20 as a gripping rod having an engine-side shaft 22 as a power transmission shaft therein is inserted from the other end, and the engine-side pipe 20 is positioned, tightened, fixed and connected. Therefore, the connecting pipe 1 is
And a connection pipe body 2 having a cylindrical shape having an inner diameter substantially the same as (slightly wider than) the outer diameter of the engine-side pipe 20.
In addition, holes and slits are formed as means for positioning and tightening and fixing the two pipes, and various parts are attached. A bearing 3 that rotatably supports the engine-side shaft 22 is provided inside the connection pipe main body 2. Thus, when the pipes are connected, the power of the engine (not shown) is transmitted to the engine-side shaft 22 supported by the bearing 3 and the gear-side shaft 32 connected thereto.
, And is smoothly transmitted to a gear (not shown).

The connection of each pipe is performed by first connecting the connection pipe 1 to the engine-side pipe 20 and then connecting the connection pipe 1 to the gear-side pipe 30.
(1) Means for positioning engine-side pipe 20 (2) Means for fastening and fixing engine-side pipe 20 (3) Means for positioning gear-side pipe 30 (4) Gear side The means for tightening and fixing the pipe 30 will be described.

(1) The means for positioning the engine-side pipe 20 comprises, for example, a female threaded hole 4 and a male threaded positioning screw 5 drilled in the connecting pipe body 2. The engine-side pipe 20 is inserted into the connection pipe 1 and is appropriately rotated in the circumferential direction.
When the position of the hole 21 drilled in the hole and the position of the hole 4 drilled in the connection pipe body 2 match, the positioning screw 5 is screwed into the hole 4 so that the positioning screw 5
1 penetrates into the engine-side pipe 20 and serves as a detent and retainer, thereby positioning the engine-side pipe 20.

(2) The means for tightening and fixing the engine-side pipe 20 includes, for example, a slit 6 formed in the connecting pipe body 2, a hole 6a which is a fool hole formed on one side of the slit 6, and the other. Female threaded hole 6b drilled on the side of
Consisting of After the positioning of the engine-side pipe 20 inserted into the connection pipe 1 is completed by the above-described procedure, the tightening screw 7 is inserted from the side of the hole 6a and screwed into the hole 6b to reduce the interval between the slits 6. Thus, the connection pipe body 2 tightens and fixes the engine-side pipe 20.

The means for positioning the engine-side pipe 20 and the means for tightening and fixing are not limited to the above-described embodiments, but may be any means as long as a similar effect can be obtained. For example, a unit for positioning the gear-side pipe 30 and a unit for tightening and fixing, as described later, can be used.

(3) The means for positioning the gear-side pipe 30 is a ratchet 11, and a fixed claw 12 is provided at one end.
And a spring 13 serving as an elastic body is connected to the other end, a center portion is pivotally supported by a shaft 10, and is provided between slits 8 formed in the connection pipe main body 2. That is,
When the gear-side pipe 30 is inserted into the connection pipe 1 and abuts against the spigot portion 15, the fixed claw 12 formed at one end of the ratchet 11 engages with the hole 31 formed in the gear-side pipe 30. As a result, the gear-side pipe 30 is positioned.

Here, the fixed claw 12 formed at one end of the ratchet 11 is provided with a hole 31 formed in the gear-side pipe 30.
And is formed in a substantially triangular shape as shown in FIGS. In this substantially triangular fixed claw 12, if the slope of one side of the triangle on the left side in the figure is made gentle, the gear-side pipe 30 is connected to the connection pipe main body 2.
When the ratchet 11 is easily displaced to the position shown in FIG. 3 when it is inserted into the connector, and the slope of one side of the triangle on the right side in the drawing is made steep, the gear-side pipe 30 becomes difficult to fall out of the connection pipe main body 2. Good condition.

A spring 13 which is an elastic body connected to the other end of the ratchet 11 applies an urging force in a direction to push up the other end of the ratchet 11. Therefore, the fixed claw 12 formed at one end of the ratchet 11 whose center is pivotally supported by the shaft 10 applies an urging force so as to face the inside of the connection pipe main body 2. The central portion of the ratchet 11 is supported by a shaft 10 inserted into a hole 8a and a hole 8b, which will be described later, and is further provided between slits 8 formed in the connection pipe main body 2.
Is configured to be rotatable. However, the rotation to one end where the fixed claw 12 is formed is regulated by the stopper 14 formed in the connection pipe main body 2, and the rotation to the other end to which the spring 13 is connected is performed by the spring 13. Be regulated.

The bearing 3 is provided inside the connecting pipe body 2.
When the gear-side pipe 30 is fully inserted into the connection pipe 1,
You may comprise so that the gear side pipe 30 may contact | abut. Thereby, the spigot portion 15 has a role of assisting the positioning of the gear-side pipe 30 and a role of a guide when the gear-side pipe 30 is appropriately rotated in the circumferential direction.

(4) The means for tightening and fixing the gear-side pipe 30 includes, for example, a slit 8 formed in the connecting pipe body 2, a hole 8a which is a fool hole formed on one side of the slit 8, and the other. , A female threaded hole 8b, a shaft 10 with a male thread at the tip, and a tightening knob 9 connected to the shaft 10. The fixed claw 12 formed at one end of the ratchet 11 is engaged with a hole 31 formed in the gear-side pipe 30, so that the connection pipe main body 2 is formed.
After the positioning of the gear-side pipe 30 to be inserted into the hole 8 is completed, the tightening knob 9 is turned to screw the shaft 10 connected thereto into the hole 8b, thereby narrowing the interval between the slits 8.
The gear-side pipe 30 is fastened and fixed by the connection pipe body 2. The means for fastening and fixing the gear-side pipe 30 is not limited to the above-described embodiment, but may be any means as long as a similar effect can be obtained.

2. Configuration of Engine-side Pipe 20 The engine-side pipe 20 is a thin hollow tube, and one end thereof is connected to an engine (motor) and a handle (not shown). At the other end, a hole 21 into which the positioning screw 5 for connecting to the connection pipe 1 is inserted is formed. One end of the engine-side pipe 20 is connected to an engine (not shown) at one end thereof, and the engine-side shaft 2 is a power transmission shaft for transmitting a driving force of the engine.
There are two. At the other end of the engine-side shaft 22, a concave portion 23 into which the tip portion 33 of the gear-side shaft 32 is inserted is formed, and the inner surface of the concave portion 23 forms a spline. The engine side shaft 22 is rotatably supported by a bearing 3 provided inside the connection pipe main body 2 when the connection pipe 1 and the engine side pipe 20 are connected.

3. Configuration of Gear-Side Pipe 30 The gear-side pipe 30 is also a thin hollow tube, and one end thereof is connected to a gear and a cutter (working machine) (not shown). At the other end, a hole 31 is formed in which the fixed claw 12 for connecting to the connection pipe 1 is engaged. The hole 31 is formed at a position where the fixed claw 12 engages with the tip of the gear-side pipe 30 in contact with the spigot portion 15. At the center of the inside of the gear-side pipe 30, there is a gear-side shaft 32, one end of which is connected to a gear (not shown) and which is a power transmission shaft for transmitting a driving force to the gear. The other end of the gear-side shaft 32 forms a distal end portion 33 that engages with the concave portion 23 of the engine-side shaft 22, and the outer surface of the distal end portion 33 forms a spline. The gear-side shaft 32 is rotatably supported by the bearing 3 provided inside the connection pipe main body 2 via the engine-side shaft 22 when the connection pipe 1 and the gear-side pipe 30 are connected.

[Explanation of connection and removal of each pipe] Connection between the connection pipe 1 and the engine-side pipe 20 The connection operation between the connection pipe 1 and the engine-side pipe 20 is as follows.
This is performed according to the following procedure. (1) The tip of the engine-side pipe 20 is inserted into the connection pipe 1 so that the engine-side shaft 22 is supported by the bearing 3 provided inside the connection pipe main body 2. (2) The engine-side pipe 20 is appropriately rotated in the circumferential direction, and when the position of the hole 21 formed in the engine-side pipe 20 matches the position of the hole 4 formed in the connection pipe body 2, the hole 4 is formed. The positioning screw 5 is screwed into the inside to position the engine-side pipe 20. (3) After the positioning of the engine-side pipe 20 is completed, the tightening screw 7 is inserted from the side of the hole 6 a and screwed into the hole 6 b to reduce the interval between the slits 6.
0 is tightened and fixed, and the connection operation ends.

2. Connection between the connection pipe 1 and the gear-side pipe 30 The connection operation between the connection pipe 1 and the gear-side pipe 30 is performed by the following procedure after the connection operation between the connection pipe 1 and the engine-side pipe 20 is completed. (1) The leading end 33 of the gear-side shaft 32 is engaged with the concave portion 23 of the engine-side shaft 22 supported by the bearing 3 to form a spline, and the spigot portion 15 formed inside the connecting pipe body 2 The tip of the gear-side pipe 30 is inserted into the connection pipe 1 so as to abut. At this time,
The ratchet 11 provided on the connection pipe 1 is substantially horizontal against a biasing force of a spring 13 connected to the other end by a fixed claw 12 formed at one end of the ratchet 11 being pressed against the outer wall of the gear-side pipe 30. It turns to the state shown in FIG. (2) The gear-side pipe 3 using the spigot part 15 as a guide
When the position of the fixed claw 12 formed at one end of the ratchet 11 and the position of the hole 31 formed in the gear-side pipe 30 coincide with each other, the other end of the ratchet 11 is rotated. The ratchet 11 is rotated by the urging force of the spring 13 connected to the gear, and the fixed claw 12 is engaged with the hole 31 to be in a state as shown in FIG. 2B, and the gear-side pipe 30 is positioned. . (3) After the positioning of the gear side pipe 30 is completed,
Turn the tightening knob 9 so that the shaft 10 connected to the
b into the gear-side pipe 3
Then, the connection work is completed.

3. Removal of Pipes When storing, etc., the following procedure is used to remove the pipes already connected and release the connection. (1) In order to remove the gear-side pipe 30 from the connection pipe 1, the tightening knob 9 is loosened to release the tightening and fixing of the gear-side pipe 30. (2) Next, by pushing the other end of the ratchet 11 (the side to which the spring 13 is connected), the ratchet 11 is rotated against the urging force of the spring 13, and the engagement between the fixed claw 12 and the hole 31 is made. Cancel. (3) In that state, connect the connecting pipe 1 to the gear side pipe 3
By pulling out 0, the connection between both pipes is released.

It is not necessary to release the connection between the connecting pipe 1 and the engine side pipe 20 during normal storage or the like. Therefore, such a connecting method of the two pipes is relatively rigid as described above. There is no problem with the connection method. When it is necessary to release the connection, an operation reverse to the operation at the time of connection may be performed.

[0025]

According to the present invention, there is provided a connecting device for a divided gripping rod.
In the connection pipe, a fixed claw is formed at one end, an elastic body is connected to the other end, a central portion is pivotally supported, using a ratchet provided between the slits, a hole formed in the fixed claw and the gripping rod. Are engaged to perform the positioning and to connect the divided gripping rods, so that the following effects can be obtained. (1) Inserting the gripping rod until it comes into contact with the spigot part of the connection pipe, positioning the spigot part only by rotating the gripping rod appropriately in the circumferential direction using the spigot part as a guide, and turning the tightening knob to tighten and fix As a result, the connection work is completed, and the connection of the divided gripping rods is easy and reliable. Also, when releasing the connection of the gripping rods,
Since the above positioning can be released with one touch, the divided gripping rod can be easily removed. (2) The effects described above can be obtained with a relatively simple configuration as described above, so that the structure of the connecting device can be simplified and the cost can be reduced. (3) In addition, by adopting a configuration in which the gripping rod can be divided, the effect of easily packing, transporting, and storing the brush cutter and the like can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connecting pipe constituting a connecting device for a divided gripping rod according to the present invention.

FIG. 2A is a plan view showing a state in which both divided pipes are connected by using the divided gripping rod connecting device according to the present invention, and FIG. 2B is an AA direction of the same figure. It is sectional drawing.

FIG. 3 is a sectional view showing a state before a gear-side pipe is positioned.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Connection pipe (connection apparatus) 2 Connection pipe main body 3 Bearing 4 Hole (female screw) 5 Positioning screw (male screw) 6 Slit 6a Hole (fool hole) 6b Hole (female screw) 7 Tightening screw (male screw) 8 Slit 8a Hole (fool hole) 8b Hole (female screw) 9 Tightening knob 10 Shaft (male screw) 11 Ratchet 12 Fixed claw 13 Spring (elastic body) 14 Stopper 15 Inner part 20 Engine side pipe (first gripping rod) 21 Hole 22 Engine side shaft (power transmission shaft) 23 Recess (spline) 30 Gear side pipe (second gripping rod) 31 Hole 32 Gear side shaft (power transmission shaft) 33 Tip (spline)

Claims (2)

[Claims] 1. A split gripping rod connecting device, wherein a gripping rod having a power transmission shaft therein is inserted from an end portion, and the gripping rod is positioned, tightened and fixed and connected, wherein the gripping rod is positioned. As one end, a fixed claw that engages with a hole formed in the gripping rod is formed at one end, an elastic body that biases the fixed claw toward the hole is connected to the other end, and a central portion is pivotally supported, A coupling device for a split gripping rod, comprising: a ratchet provided between slits formed in a coupling device main body; and a means for tightening and fixing the gripping rod. 2. The split gripping rod according to claim 1, wherein an inlay portion is formed inside the connecting device body as an auxiliary means for positioning the gripping rod. Coupling device.