JPH0210811Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Field of Application The present invention is aimed at assembling an operating wire, in which an inner wire is movably inserted into an outer wire, to a fixed support member. The present invention relates to an operation wire assembly structure in which a receiving tube is fitted to an end portion and the receiving tube is attached to a guide tube provided on the support member.

(2) Conventional technology Conventionally, such an assembly structure has been proposed, for example, in
As disclosed in Publication No. -101451, an adjuster serving as a receiver is provided with a male thread, and
A female thread is provided in the guide tube, an adjuster is screwed into the guide tube, and a lockite is screwed into the male screw to fix the adjuster to the guide tube.

(3) Problems to be solved by the invention In the above-mentioned conventional technology, a rotary tool such as a spanner is required during assembly, making the assembly work complicated.
In addition, the fixation structure by screwing has a complicated shape,
Machining the parts is also troublesome. Furthermore, when assembling by screwing, the assembling direction is limited to a fixed direction, and the shape of the adjuster as a receiving cylinder is restricted.

The present invention was developed to solve the above-mentioned conventional problems, and allows assembly work to be performed extremely easily without using tools, and also allows the assembly direction to be selected arbitrarily. It is an object of the present invention to provide a structure for assembling an operation wire that can be easily removed and removed.

B. Structure of the invention (1) Means for solving the problem According to the invention, the outer diameter of the receiver tube is set to such an extent that it can fit into the guide tube, and the outer surface of the receiver tube has the following features:
A tapered surface that becomes larger in diameter toward the rear,
A first annular groove is provided in order from the distal end side, and at least one guide groove extending in the axial direction from the distal end to at least the first annular groove is provided, and an inner surface of the guide tube section is provided with a first annular groove. A second annular groove corresponding to the groove is provided, and the first and second annular grooves have a groove that expands from the first annular groove toward the second annular groove in response to insertion of a tool having a rod-shaped portion into the guide groove. A resilient metal C-shaped clip is fitted.

(2) Function When the receiving tube is fixed to the guide tube, the C-shaped clip is attached to the tip of the receiving tube, and when the receiving tube is inserted into the guide tube in this state, the C-shaped clip is attached to the guide tube. It is brought into pressure contact with the tapered surface due to friction with the inner surface of the cylindrical portion, expands in diameter as the tapered surface enters the guide cylindrical portion, and finally fits into the first and second annular grooves. This prevents the receiving tube from escaping from the guide tube section even with a relatively weak normal external force. Moreover, C
The diameter of the letter-shaped clip expands as the rod-shaped tool is inserted into the guide groove, and in the expanded diameter state, the receiving tube can be relatively easily pulled out from the guide tube portion.

(3) Embodiment Hereinafter, an embodiment in which the present invention is applied to a carburetor will be explained with reference to the drawings. First, in FIG. 1 showing a first embodiment of the present invention, a carburetor 1 has an intake passage 2. Carburetor body 3 and float chamber body 4
A bench lily part 5 is provided in the middle part of the intake passage 2.

A cylinder part 6 extending upward is integrally connected to the upper part of the carburetor main body 3 corresponding to the bench lily part 5, and a sliding throttle valve 7 for opening and closing the bench lily part 5 is slidably connected to this cylinder part 6. Ru. On the other hand, a float chamber body 4 is located at the bottom of the carburetor body 3 facing the bench lily portion 5.
A main fuel nozzle 8 communicating with a float chamber (not shown) defined by the carburetor main body 3 is disposed, and a metering needle valve 9 held at the bottom of the sliding throttle valve 7 is connected to the main fuel nozzle. 8 is inserted.

A cap 10 serving as a support member is screwed onto the upper end of the cylindrical portion 6, and an operating wire 11 for operating the sliding throttle valve 7 is assembled to the cap 10. Further, a return spring 12 is interposed between the sliding throttle valve 7 and the cap 10, and the sliding throttle valve 7 can be opened by the operation wire 11 against the spring force of the return spring 12. I can do it.

In FIG. 2, the operating wire 11 has an inner wire 14 movably inserted into an outer wire 13, and the end of the outer wire 13 is connected to the receiving tube 1.
5 is fitted. On the other hand, a guide cylinder part 16 is integrally protruded from the upper center of the cap 10, and the receiving cylinder 15 is fitted into the guide cylinder part 16. In addition, the inner wire 14 is connected to the receiving tube 15 and the guide tube portion 1.
6, extends into the cylindrical portion 6, and is connected to the sliding throttle valve 7.
connected to.

In FIG. 3, the receiving cylinder 15 is basically formed in a cylindrical shape, and the outer surface thereof has a tapered tip that gradually becomes smaller in diameter from the tip side (lower end side in FIG. 3). A guide surface 17, a small-diameter mounting portion 18 continuous to the large-diameter end of the distal guide surface 17, a tapered surface 19 that becomes smaller in diameter toward the distal end, a first large-diameter portion 20, a first annular groove 21, and a first annular groove 21. 2 large diameter part 22
and a medium diameter portion 23 are provided.

The outer diameters of the first and second large diameter portions 20 and 22 are determined to such an extent that they can be fitted into the guide cylinder portion 16, and the outer diameter of the large diameter end of the tapered surface 19 is set to the extent that the first and second large diameter portions 20, 22 can be fitted into the guide cylinder portion 16.
It is determined to be the same as the outer diameter of 0.22.

Referring again to FIG. 2, the receiving tube 15 has a small-diameter insertion hole 24 at its distal end side, and a fitting hole 26 connected to the insertion hole 24 via a step 25 and having the same axis. The end of the outer wire 13 is fitted into the fitting hole 26 until it comes into contact with the stepped portion 25. The inner wire 14 protruding from the outer wire 13 is inserted into the insertion hole 24.

On the other hand, a fitting hole 27 is provided concentrically in the guide tube portion 16, and a receiving collar 28 that protrudes radially inward in order to receive the tip of the receiving tube 15 is completely provided at the inner end of the fitting hole 27. It is provided around the circumference.

Referring also to FIG. 4, the inner surface of the fitting hole 27 in the guide tube portion 16 has a flange 28 for receiving the tip.
A second annular groove 29 is provided corresponding to the first annular groove 21 of the receiving tube 15 in contact with the receiving cylinder 15 . A C-shaped clip 30 made of an elastic metal such as a spring wire is fitted into the first and second annular grooves 21 and 29, thereby preventing the receiving tube 15 from escaping from the guide tube portion 16. Ru.

The C-shaped clip 30 has a circular structural cross-section and is formed into a substantially ring shape, and in its natural state has an inner diameter large enough to be attached to the small-diameter attachment portion 18.

The side surface 29a of the second annular groove 29 on the outer side along the axis of the guide tube portion 16 is formed in a tapered shape that becomes smaller in diameter toward the outer side.

Further, an annular engagement groove 3 is formed on the outer surface of the guide tube portion 16.
1 is provided. An engaging pawl 34 provided at the other end of the boot 33, which has a hole 32 at one end through which the outer wire 13 is inserted, is engaged with the engaging groove 31, so that the part where the outer wire 13 is attached to the cap 10 is secured. Covered by boots 33.

In FIG. 5, a pair of rectangular insertion holes 35 are bored in the receiving collar 28 at the inner end of the guide tube portion 16 along one diameter line thereof. Further, a pair of guide grooves 36 are provided on the outer surface of the receiving tube 15 along a diameter line, extending along the axial direction from the tip thereof to the middle portion of the second large diameter portion 22 . These guide grooves 36 are
The depth becomes shallower toward the rear side, that is, toward the second large diameter portion 22.

In FIG. 6, from each insertion hole 35 to each guide groove 3
A removal tool 37 is inserted into 6. This removal tool 37 is formed into a substantially U-shape by interconnecting the base ends of a pair of parallel bar-shaped parts 38, and the tip of each bar-shaped part 38 is sharpened. Moreover, the distance l between the mutually opposite outer surfaces of both rod-shaped parts 38
are the first and second large diameter portions 2 in the receiving tube 15
It is set to be slightly larger than the outer diameter D of 0.22.

Next, to explain the operation of this embodiment, when assembling the operating wire 11, the outer wire 13
At the same time, a C-shaped clip 30 is fitted to the small diameter mounting portion 18 of the receiving tube 15.
With the receiving cylinder 15 attached, move the guide cylinder part 16
It is inserted into the insertion hole 27 of. During this insertion, the clip 30 is pressed against the tapered surface 19 by friction with the inner surface of the insertion hole 27. When the receiving tube 15 is further inserted, the clip 30 enters the fitting hole 27 while slidingly contacting the inner surface of the fitting hole 27, and when it reaches the second annular groove 29, its diameter expands and the clip 30 is fitted into the second annular groove 29. match. As a result, the clip 30 stops advancing, and as only the tapered surface 19 advances, the clip 30 expands in diameter by the tapered surface 19, and finally passes over the first large diameter portion 20 and enters the first annular groove 20. , and the operation of assembling the operating wire 11 is completed.

In this state, that is, the first and second annular grooves 2
Assume that a relatively weak normal external force is applied to the receiving tube 15 in the direction of pulling it out from the guide tube 16 while the clip 30 is fitted to the guide tubes 1 and 29. When the receiving tube 15 moves in the extraction direction in response to the action of the external force, the clip 30 comes into contact with the tapered side surface 29a of the second annular groove 29. For this reason, a force is applied to the clip 30 in the direction of diameter reduction, but
Since the inner surface of the clip 30 is in contact with the bottom surface of the first annular groove 21, the diameter of the clip 30 is prevented from decreasing, and therefore the receiving tube 15 is prevented from escaping from the guide tube portion 16.

During this assembly, the C-shaped clip 30 is
When fitting into the annular groove 21, a "snap" sound is heard, so it can be confirmed that the assembly has been performed in the correct position.

Next, when removing the operating wire 11, the cap 10 is screwed back and removed from the cylindrical portion 6, and the connection between the inner wire 14 and the sliding throttle valve 7 is released. Thereafter, the receiving tube 15 and the cap 10 are relatively angularly displaced so that both guide grooves 36 correspond to the insertion holes 35, and both rod-shaped parts 38 of the removal tool 37 are inserted into the insertion holes 35.
5 into the guide groove 36. Next, when the removal tool 37 is pressed and the rod-shaped portion 38 is pushed in as shown by the chain line in FIG. 6, the C-shaped clip 30 is removed.
The diameter is expanded toward the second annular groove 29 side. Therefore, when the receiver tube 15 is pulled, the engagement between the C-shaped clip 30 and the first annular groove 21 is released, so the operating wire 11 and the receiver tube 15 can be relatively easily removed from the cap 10. I can do it.

FIG. 7 shows a second embodiment of the present invention, in which a groove 39 is formed on the inner surface of the guide tube portion 16 over the entire length in the axial direction and is connected to an insertion hole 35 formed in the receiving collar 28. The insertion hole 35 and the groove 39 are formed at the same time when the cap 10 is cast.

By providing the groove 39 in this manner, the removal tool 37' having a single rod-shaped portion 38 can be used to remove the C.
The receiving tube 15 and the operating wire 11 can be removed from the cap 10 by expanding the cylindrical clip 30 to a relatively large diameter. Moreover, only one guide groove 36 is required in the receiving tube 15.

FIG. 8 shows a third embodiment of the present invention, in which the receiving tube 15' and the boot 33' are formed curved within a plane containing the axis of the operating wire 11.
Even if the receiving tube 15' is bent in this way, the receiving tube 15'
The operating wire 11 can be assembled by simply fitting the guide tube 5' into the guide tube 16, and the insertion hole 3
Since the operating wire 11 can be removed simply by pushing the removal tool 37 (see FIG. 6) into the guide groove 36 and the guide groove 36, the direction of the operating wire 11 can be arbitrarily selected.

In each of the above embodiments, the operating wire 11 for operating the sliding throttle valve 7 has been described, but the present invention can be implemented in connection with a throttle wire, a choke wire, a starting operating valve wire, etc. in a carburetor. It is also possible.

C. Effects of the invention As described above, according to the invention, the outer diameter of the receiver tube is set to such an extent that it can be fitted into the guide tube, and the outer diameter of the receiver tube is marked in order from the tip side toward the rear side. A tapered surface whose diameter becomes larger as the diameter increases, and a first annular groove are provided, a second annular groove corresponding to the first annular groove is provided on the inner surface of the guide tube, and a second annular groove corresponding to the first annular groove is provided on the inner surface of the guide tube portion.
A metal C-shaped clip is fitted into the first and second annular grooves, so that by simply fitting the receiver tube with the clip attached to the tip into the guide tube, the C-shaped clips can be inserted into the first and second annular grooves. When it is fitted into the two annular grooves, the work of assembling the receiving cylinder to the guide cylinder part is completed. Therefore, the structure is simple and the parts can be easily processed.
Furthermore, assembly work can be carried out extremely easily without using any tools.

Further, the outer surface of the receiving cylinder is provided with at least one guide groove extending in the axial direction from the tip to at least the first annular groove, and the C-shaped clip is configured to allow insertion of a tool having a bar-shaped portion into the guide groove. Since the clip has elasticity that allows the diameter to expand from the first annular groove toward the second annular groove in response to , the receiver tube and the operating wire can be easily removed from the support member.

Moreover, in the above-described assembly and removal, the direction of the operating wire is not selected, but the direction in which the operating wire is attached can be arbitrarily selected.

[Brief explanation of the drawing]

Figures 1 to 6 show a first embodiment of the present invention, in which Figure 1 is a vertical sectional side view of the carburetor, Figure 2 is an enlarged view of Figure 1, and Figure 3 is a receiver cylinder. Figure 4 is a longitudinal side view corresponding to Figure 2, Figure 5 is a side view of
The figure is a cross-sectional view taken along the line -- of FIG. 4, FIG. 6 is an enlarged vertical sectional side view of the main part, and FIG. 7 is an enlarged vertical sectional side view of the main part corresponding to FIG. ,
FIG. 8 is a longitudinal sectional view corresponding to FIG. 2 of the third embodiment of the present invention. 10... Cap as a support member, 11...
Operation wire, 13... Outer wire, 14... Inner wire, 15, 15'... Receiving tube, 16...
Guide tube portion, 19... Tapered surface, 21... First annular groove, 29... Second annular groove, 30... C-shaped clip, 35... Insertion hole, 36... Guide groove, 37, 3
7'...Removal tool, 38...Bar-shaped part, 39...
groove.

Claims (1)

[Claims for Utility Model Registration] (1) In order to assemble an operating wire, in which an inner wire is movably inserted into an outer wire, to a fixed support member, a receiving tube is fitted to the end of the outer wire, and the inner wire is movably inserted into the outer wire. In the operation wire assembly structure in which the receiver tube is attached to a guide tube provided on a member, the outer diameter of the receiver tube is set to such an extent that it can fit into the guide tube, and the outer surface of the receiver tube has a A tapered surface whose diameter increases toward the rear side and a first annular groove are provided in order from the tip side, and at least one guide groove extending in the axial direction from the tip to at least the first annular groove is provided. A second annular groove corresponding to the first annular groove is provided on the inner surface of the guide cylinder portion, and the first and second annular grooves are provided with a groove for inserting a tool having a rod-shaped portion into the guide groove. An operating wire assembly structure characterized in that a metal C-shaped clip having elasticity that can expand in diameter from the first annular groove toward the second annular groove is fitted. (2) The guide tube portion is integrally provided with a receiving flange for receiving the tip of the receiving tube, and the receiving flange is provided with an insertion hole for inserting the tool,
The operating wire assembly structure according to claim (1) of the registered utility model, characterized in that the inner surface of the guide tube portion is provided with a groove that extends over the entire length in the axial direction and is continuous with the insertion hole.