JPH0538245Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an improvement of a bellows boot for dustproofing and waterproofing that is attached to the end of a control cable used for remote control of industrial equipment. .

[Prior art] The thickness of the bellows part of a bellows boot (hereinafter simply referred to as a boot) used for a control cable (hereinafter simply referred to as a cable) is such that the thickness of the bellows part allows that part to easily expand and contract as the inner cable of the cable slides. In order to achieve this, it is common to make the entire body relatively thin and to have a uniform wall thickness.

Furthermore, as shown in Japanese Utility Model Application No. 58-140356, a structure has been devised in which a protrusion is formed on the inner surface of the trough of the boot so that the protrusion comes into sliding contact with the sleeve.

[Problems to be Solved by the Invention] The conventional boots, such as the former mentioned above, have a problem as shown in FIG. , cable 21
a cap member 23 secured to the end of the conduit 22;
One end 20a is fitted to the conduit 22, and the other end 20b is fitted to the conduit 22.
A ring 25 is attached to the inner cable 24 which is slidably inserted therein.
There is a boot 20 that is fastened by a screwdriver or the like. In such a structure, when the inner cable is slid in direction A or B, boot 20 is compressed or expanded. In such a state, especially when the inner cable 24 slides in the direction B and the boot 20 is extended, the second
As shown in the figure, since the air inside the boot 20 becomes negative pressure, the trough 26 comes into sliding contact with the inner cable 24 and the guide pipe connected to the cap member (not shown), so the boot is prevented by friction. Tanibe 2 relatively early
6 is worn out and torn, which causes muddy water, dust, etc. to enter between the conduit and the inner cable, causing rust and other problems that impede the smooth sliding of the inner cable. .

In the latter device, a protrusion is formed on the inner surface of the boot at an appropriate position in the trough. However, when such protrusions are brought into sliding contact with the sleeve, since the sleeve is much thicker than the inner cable, the protrusions support each other and do not come into contact with the thin troughs; If the inner cable directly touches the trough of the boot, as in the case of

[Means for Solving the Problem] The present invention provides a bellows boot for a control cable in which one end is fixed to the conduit side of the control cable and the other end is fixed to an inner cable slidably inserted into the conduit. , a structure is adopted in which the wall thickness of all the valleys of the bellows is thicker than the wall thickness of other parts over the entire circumference.

[Function] By increasing the wall thickness of the valley of the bellows, the boots of the present invention can prevent friction even when the valley comes into sliding contact with the inner cable etc. due to the sliding of the inner cable. , it does not wear out easily like the conventional one.

[Example] An example of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway side view of the main parts of an embodiment of the present invention.

In FIG. 1, one end 1a of the cable 2 is fitted into a cap member 4 fixed to the end of a conduit 3, and the other end 1b is attached to an inner cable 5 slidably inserted into the conduit 3, such as a ring 6, etc. The valley part 7 of the boot 1 which has been tightened by the trough is thicker than the other parts over the entire circumference, and the inner cable 5 is attached to A or B.
Even if the valley part 7 of the boot 1 comes into sliding contact with the inner cable 5 etc. by sliding in the direction, the valley part 7 is made thick enough to prevent wear and tear due to friction, so it can be used for a relatively long period of time. can withstand.

It should be noted that the shape of the wall thickness of the valley shown in the drawings is just one example, and it goes without saying that the shape is not limited to this shape.

[Effect of the invention] When the structure of the invention is adopted, the thickness of the trough of the boot that makes sliding contact with the inner cable is much thicker than other parts, which causes friction with the inner cable, etc. Since the boots can withstand long-term use and are not subject to wear and tear, this provides an excellent effect in that smooth sliding of the cable is not hindered for a long period of time.

[Brief explanation of the drawing]

The drawings are related to the present invention, and Fig. 1 is a partially cutaway side view of the main part showing an embodiment of the boot of the present invention, and Fig. 2 is a partially cutaway side view of the main part of the conventional boot showing the extended state. FIG. 3 is a partially cutaway side view. 1...Boots, 2...Control cable,
3... Conduit, 4... Cap member, 5... Inner cable,
7...Tanibe.

Claims (1)

[Scope of utility model registration request] In a bellows boot for a control cable in which one end is fixed to the conduit side of the control cable and the other end is fixed to an inner cable slidably inserted into the conduit, the wall thickness of all the valleys of the bellows is the entire circumference. A bellows boot for control cables that is characterized by being thicker than other parts.