JPH026251Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention involves forming a strand by closely spirally winding a large number of metal wires around a liner made of synthetic resin, and wrapping the outer periphery of the strand with a liner made of synthetic resin. A cylindrical fixture is fixed to the end of the outer tube of the control cable, the inner cable of which is slidably inserted into the outer tube covered with a jacket,
The present invention relates to a control cable terminal device in which the terminal end of the inner cable is connected to a rod that is attached to the fixture so as to be freely movable in the axial direction.

Problems to be Solved by Prior Art and Ideas Conventionally, one of the methods for fixing a fixture to the end of an outer tube having such a structure is to cut off the jacket at the end of the outer tube to expose the strands. The exposed strands are untwisted to create a gap between the liner and the liner, a thin reinforcing tube made of mild steel is inserted into the gap, and on top of that, a metal with a low melting point such as zinc or aluminum is die-cast into a cylindrical shape. There is a method of caulking and fixing a strand between the reinforcing tube and the fixing device by fitting a molded fixing device onto the outside and caulking its outer periphery, but in this case, the reinforcing tube is attached to the fixing device. Since the strand is only indirectly connected by the crimping force on the outer periphery and is not directly connected to the fixing device, if the crimped part becomes loose and a relative slip occurs between the strand and the fixing device, , the reinforcing tube moves together with the strand, and in the end, the strength of the axial connection between the outer tube and the fixture depends only on the frictional force between the inner peripheral surface of the caulked part of the fixture and the outer peripheral surface of the strand. When the fixing device is exposed to high temperatures, the caulked portion tends to loosen due to creep phenomenon or thermal expansion, and when the caulked portion loosens, the connection between the outer circumferential surface of the strand and the inner circumferential surface of the fixing device may become loose. As the frictional force is reduced, the end of the outer tube may slip in the axial direction against the fixture due to the operating force acting on the inner cable, which has the disadvantage of reducing the efficiency of transmitting operating force and the reliability of operation. .

Means for Solving the Problems In order to solve the above problems, the present invention forms a strand by closely spirally winding a large number of metal wires around a liner made of synthetic resin, and the outer periphery of the strand is A cylindrical fixture was fixed to the end of the outer tube of the control cable, in which the inner cable was slidably inserted into an outer tube covered with a synthetic resin jacket, and the control cable was attached to the fixture so that it could move freely in the axial direction. In a control cable terminal device in which the terminal end of the inner cable is connected to a rod, a thin reinforcing tube made of mild steel is inserted between the liner and the strand exposed by cutting off the jacket at the terminal portion of the outer tube. A portion of the strand is inserted so as to protrude from the end of the strand, and the fixing device is externally fitted onto the strand to couple the protruding portion of the reinforcing tube to the inner circumference of the fixing device, and the outer circumference of the fixing device is The structure is such that the strand is caulked between the reinforcing tube and the reinforcing tube by pressing.

Function The terminal device of the control cable of the present invention has the above-mentioned structure, and by joining a part of the reinforcing tube to the fixture, the reinforcing tube is fixed to the fixture so that it cannot move in the axial direction. When a relative moving force in the axial direction is applied between the tool and the outer tube, friction occurs between the outer periphery of the strand and the inner periphery of the fixture, and between the inner periphery of the strand and the outer periphery of the reinforcing tube. , frictional force acts on both the inner and outer circumferences of the strands.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 shows a first embodiment of the present invention. In the figure, reference numeral 1 indicates a control cable, which is constructed by closely and spirally winding a large number of round steel wires 3 around a liner 2 made of synthetic resin. A jacket 6 made of synthetic resin is formed around the strand 5.
An inner cable 8 made of a large number of twisted steel wires is slidably inserted into the liner 2 of the outer tube 7, which is coated with the inner cable 8, so as to transmit operating forces in both push and pull directions. . At the end of the control cable 1, the jacket 6 at the end of the outer tube 7 is cut off to a predetermined length to expose the strand 5, and the end of the outer tube 7 is made of a metal with a low melting point such as zinc. The fixing device 10 formed by die-casting is inserted into the mounting hole 12 on the rear end side and protruded forward from the enlarged diameter hole 14 on the tip side, and the strands 5 of the protruding outer tube 7 are untwisted and connected to the liner 2. Leave a gap between them, and in that gap,
A reinforcing tube 16 having a coupling flange 15 is inserted into the outer periphery of the tip of a thin-walled mild steel cylinder 13, and then the outer tube 7 is pulled back and the end portion is inserted into the mounting hole 12, and the reinforcing tube 16 is inserted. 16 Tsuba 1
5 is brought into contact with the stepped portion 17 at the rear end of the enlarged diameter hole 14, while a female thread 18
A fixing member 21 having a male thread 20 formed on the outer circumferential surface is screwed into the female thread 18, thereby tightening the collar 15 to the stepped portion 17 and pivoting the reinforcing cylinder 16 relative to the fixture 10. The outer periphery 22 and the reinforcing tube 16 are connected to each other so as not to be movable in the direction, and the outer periphery 22 corresponds to the center of the reinforcing tube 16 of the fixture 10.
The fixing device 10 is fixed to the end of the outer tube 7 by caulking the corresponding outer peripheral portion 23 around the adjacent portion of the outer tube 7 and caulking the strand 5 between the reinforcing tube 16 and the fixing device 10, A sleeve 25 is attached to the distal end of the fixture 10, and the spherical head 26 at the rear end is fitted into the spherical concave surface 28 of the connecting member 27 fitted into the enlarged diameter hole 14 of the fixture 10, so that the sleeve 25 can freely swing at a small angle. attached to the sleeve 25
The rod 31 is slidably inserted into the center hole 30 of the
An end of an inner cable 8 protruding from the outer tube 7 is connected to the rear end, and a collar 24 protruding from the outer circumference of the fixture 10 fixes the fixture 10 to a frame (not shown) or the like, and also connects the rod 31.
By connecting the mounting portion 32 formed at the tip of the sleeve 25 to an actuating lever (not shown) and pushing and pulling the inner cable 8 using a drive member connected to the other end of the control cable 1, the sleeve 25
The rod 31 moves through it while causing a small angle of oscillation.
slides to swing the operating lever, and in this embodiment, the reinforcing tube 16 is attached to the fixture 10 so that it cannot move in the axial direction. Outer tube 7 and fixing device 1 due to the operating force acting on 1
When a relative moving force in the axial direction is applied between 0 and 0, the outer peripheral surface of the strand 5 and the mounting hole 12 of the fixture 10
In addition to the frictional force generated between the inner circumferential surface of the strand 5 and the outer circumferential surface of the reinforcing tube 16, a frictional force is also generated between the inner circumferential surface of the strand 5 and the outer circumferential surface of the reinforcing tube 16.
0, the end portion of the outer tube 7 is reliably prevented from slipping against the fixture 10, and the crimp force on the outer periphery of the fixture 10 is reduced due to creep phenomenon and thermal expansion. Even if the frictional force between the outer circumference of the strand 5 and the mounting hole 12 of the fixture 10 is reduced, a frictional force is generated between the inner circumference of the strand 5 and the reinforcing tube 16, so that the bonding force between the outer tube 7 and the fixture 10 is reduced. This prevents a significant decrease.

FIG. 2 shows a second embodiment of the present invention, which uses a reinforcing tube 36 that is a modification of the reinforcing tube 16 of the previous embodiment, and this reinforcing tube 36 is made of mild steel similar to that of the previous embodiment. An enlarged diameter part 37 is formed on the outer periphery of the tip of the thin-walled cylinder 13, and a male thread 38 is formed on the outer periphery of the enlarged diameter part. A female thread 43 is formed on the circumferential surface to be screwed into the male thread 38 of the reinforcing tube 36, and as in the above embodiment, it is inserted into the mounting hole 41 of the fixture 40 and is inserted through the enlarged diameter hole 45 on the tip side. The reinforcing tube 36 is inserted into the gap between the strand 5 of the outer tube 7 that protrudes forward and the liner 2, and then the end portion of the outer tube 7 is inserted into the mounting hole 41.
At the same time, the fixing device 40 is turned to screw the male thread 38 of the reinforcing tube 36 into the female thread 43, and the outer circumferences 22 and 23 of the fixing device 40 are caulked in the same manner as described above, thereby attaching the fixing device 40 to the end of the outer tube 7. is fixed, and the other structure is the same as in the previous embodiment, and in this embodiment as well, the male thread 38 of the reinforcing tube 36
Since the reinforcing tube 36 is attached to the fixing device 40 so as not to be able to move in the axial direction by screwing with the female thread 43 of the fixing device 40, frictional force is generated on the inner and outer circumferences of the strand 5, and the outer tube 7 and The strength of the connection with the fixture 40 is improved as in the previous embodiment, and in this embodiment, the reinforcing tube 3
Since the male thread 38 for coupling is formed on the outer periphery of the fixing member 6, there is an advantage that the number of parts can be reduced.
The reinforcing tube 36 is connected to the fixture 40 by screwing the female screws 43 of 0, but these male screws 3
8 and the female thread 43, the connection may be made by caulking the outer periphery of the corresponding fixture 40 around the enlarged diameter portion 37.

Effects of the invention In the control cable terminal device of the present invention, the strand caulked between the reinforcing tube and the fixture is firmly connected to the fixture due to the frictional resistance generated on both the outer and inner peripheries of the strand. Therefore, the axial connection strength between the end portion of the outer tube and the fixing device is high, which reliably prevents the outer tube from slipping against the fixing device due to the operating force acting on the inner cable, and also prevents creep phenomena and heat. Even if the caulking force on the outer circumference of the fixing device loosens due to expansion and the frictional force between the outer circumferential surface of the strand and the inner circumferential surface of the fixing device decreases, the outer tube will still be attached due to the frictional force between the inner circumferential surface of the strand and the outer circumferential surface of the reinforcing tube. This has the effect of maintaining the bonding strength with the fixing device and improving durability, and also makes it possible to sufficiently increase the bonding strength of the strand to the fixing device even if the caulking area on the outside of the fixing device is reduced. As a result, the length of the fixture to be fixed to the outer tube can be reduced, and the fixture can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a first embodiment of the present invention, and FIG. 2 is a sectional view of a second embodiment. 1...Control cable, 2...Liner,
3... Round steel wire, 5... Strand, 6... Jacket, 7... Outer tube, 8... Inner cable, 10, 40... Fixture, 15... Tsuba, 1
6, 36... Reinforcement tube, 31... Rod, 38...
Male thread.

Claims (1)

[Scope of utility model registration request] A control in which a large number of metal wires are tightly wound spirally around a synthetic resin liner to form a strand, and the inner cable is freely inserted into an outer tube whose outer periphery is covered with a synthetic resin jacket. In the control cable terminal device, a cylindrical fixture is fixed to the terminal of the outer tube of the cable, and the terminal of the inner cable is connected to a rod that is attached to the fixture so as to be freely movable in the axial direction. A thin reinforcing tube made of mild steel is inserted between the liner and the strand exposed by cutting off the jacket at the end portion, with a portion of the reinforcing tube protruding from the end of the strand, and the fixing tool is placed on top of the reinforcing tube. The protruding portion of the reinforcing tube is coupled to the inner periphery of the fixture by externally fitting the strand, and the outer periphery of the fixture is pressed to caulk the strand between the reinforcing tube and the reinforcing tube. Control cable terminal device.