JP2001103635A - Sheath stripper of cabtyre cord - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheath stripper at a low cost which eliminates sheath of a cord end portion with only a little labor in order to connect a cabtyre cord with an electric wiring tool. SOLUTION: A cord stripper makes a nick in the periphery of a cord with two blades fixed to a rotary disk and eliminates sheath from the cord by squeezing in the longitudinal direction. The blades of the cord stripper are opened and closed, by using torque of friction of the rotary disk for rotating the blades and an eccentric cam. By raising and lowering a lever, the chucking of the cord and the squeezing of the sheath are generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION Captire cords for electric wiring are used in various fields requiring electric power, such as home electric appliances, vehicles, machine tools, etc., and their types are various.

[0002] The present invention relates to a single-core or multi-core tyre cord coated with a synthetic resin or the like and has an outer diameter of 20 mm.
The present invention relates to a device and a code stripper for partially removing a coating at an end of a cord for connecting the cord to a wiring device at the time of wiring, with respect to the following.

[0003]

2. Description of the Related Art The method of removing the end coating of a cabtire cord is basically to cut the outer skin of the cord circumferentially with a knife and peel off the coating from this portion. Specifically, 1) knife 2) Cut the cord with a binder with a cutting edge that can be rotated in the circumferential direction and the length direction, and cut the cord by hand. There is a method in which the cord is cut and the coating is peeled off by rotating the cord in the circumferential direction and then moving the cord in the longitudinal direction.

FIGS. 1 and 2 show a more convenient third method.
As shown in the figure, two cutters 1 with a blade part facing the center of the disk and capable of moving the blade in the radial direction.
a, 1b are attached via pressurizing springs 2a, 2b, and after the cord 7 is inserted from the center hole of the rotary disk 6 to a desired portion for removing the outer skin with the cutter interval being wide, the blade opening / closing lever 4 is moved to move the spring. The rotating disk 6 is rotated by applying a force to the cord 7 to apply a cutter thereto. As the blade rotates, the blade forms a cut in the circumferential direction of the cord 7 due to the spring force. When the blade reaches a certain depth, the blade stops entering in the radial direction by the stopper. At this stage, the rotation of the disk 6 is stopped, and when the cord is pulled out by hand, the cord is pulled out leaving the outer skin near the end to achieve the purpose.

[0005]

Although the methods 1) to 3) are used depending on the place of use, the amount of processing, etc., the present invention eliminates the disadvantages of the methods shown in FIGS. The present invention relates to means for constructing a good device.

In the method shown in FIGS. 1 and 2, the lever 4 is manually opened and closed when the cord is set, so that the operation is complicated, and the cord is pulled out by hand, which requires labor and is not suitable for mass production. Includes such issues.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention uses a rotation as a mechanism of a cord stripper which removes a part of the outer skin by making a cut on the outer circumference of the outer skin of the cord with a rotary cutter and pulling the cord in the length direction. Opening and closing the cutter,
Pressurization is performed.

[0008] A drive plate and a disk which rotate around the hollow shaft are provided, and the drive plate is externally rotated. A guide portion is provided on the drive plate, and a pair of cutter mounting plates is mounted on the drive plate and moved in the radial direction while rotating. An arc-shaped eccentric groove is provided on the cutter mounting plate.

The disk is provided with a pair of pins, which are combined with the arc-shaped eccentric grooves of the cutter mounting plate. A brake pad for giving resistance to rotation is in contact with the outer peripheral portion of the disk.

[0010] When the drive plate is rotated, rotation of the disk is caused by rotational resistance caused by the brake pad. As a result, the cutter mounting plate moves in the radial direction by the action of the pin and the eccentric groove, and the cutter rotates while cutting the cord. Reverse rotation of the drive plate causes the cutter to move radially in the opening direction with the same action.

A special cutter can be used as the rotary cutter, but a general-purpose cutter knife is used by folding it to the required length.

As a mechanism for holding the captire cord and for ironing after cutting, the cord is sandwiched between a part of a support member rotatably connected with a lever and a fulcrum pin and a part of two members that slide on each other by a pin and a long hole. By joining, a mechanism for firmly holding the cord is provided, and one end of one member is connected to the lever with a fulcrum pin, and the other member is pin-connected to the lever in a triangular shape via a link having a predetermined angle.

By moving the lever in one direction, the movement of the link causes the two clamping members to slide relatively, thereby expanding the cord clamping portion and allowing the cord to be inserted.

By returning the lever, the cord is clamped, and by moving the lever in the opposite direction, the movement of the link causes the two clamping members to be slightly displaced from each other, thereby strengthening the clamping of the cord. Is not possible, the pinching part rotates around the fulcrum pin between the support and the lever with respect to the support,
Pull the cord in the length direction and squeeze the outer skin with a cut in the outer periphery.

[0015]

FIG. 3 and FIG. 4 show an embodiment of the opening / closing and pressurizing mechanism of the cutting tool according to the present invention. The disk 8, the driving plate 9, and the cutter mounting plates 11 a and 11 b are rotatably mounted on the hollow shaft 18 via a spacer 17 on a hollow shaft 18 fixed to the column 15. The driving plate 9 is rotatable in both left and right directions by a belt 10.

On one end face of the drive plate 9, a cutter guide 1 is provided.
4 are provided. The cutter guide 14 has two cutters symmetrically with respect to the hollow shaft.
b is slidably attached to the drive plate 9 in the radial direction. The two cutters 13a and 13b turn the cutting edge toward the center of the disc, and the cutter mounting plates 11a and 11
b. The disk 8 has two pins 12
a, 12b are implanted and the cutter mounting plate 11
a, 11b are passed through the eccentric arc-shaped long holes. Further, the brake pad 1
9 is attached to the base via a spring 20.

The cord 16 from which the outer skin is to be removed is inserted into the hollow shaft 18 through the insertion opening, and a necessary outer skin removing portion is penetrated outside the cutters 13a and 13b.

When the driving plate 9 is rotated clockwise by the belt 10, the disk 8 does not rotate at first because the load is applied by the brake pad 19, and the pins 12a, 12b
Mounting plate 11 with eccentric groove guided by
a, 11b move in the rotational direction with respect to the disk, and move radially toward the center by the action of the eccentric groove. Cutters 13a and 13b are cutter mounting plates 1 having eccentric grooves.
Since it is fixed to 1a, 11b, it moves toward the center while rotating. As a result, the cutters 13a and 13b come into contact with the cord sheath.

The contact pressure between the cutter and the outer skin is determined by the frictional force between the disk 8 and the brake pad 19, and the greater the friction force, the greater the contact pressure. When the cutter comes into contact with the outer cover, the contact pressure of the cutter increases, and the disk 8 rotates by overcoming the frictional force. At the same time, the cutters 13a and 13b cut the stationary cord outer skin while rotating. At the time of driving, the cap tire cord itself is kept in a non-rotating state by means described later.

When the cord has been cut by the thickness of the outer cover, the cut is stopped by the stopper.

FIG. 5 shows an example of the stopper. As the cutting proceeds, the stoppers 22a and 22b formed by a part of the two cutter mounting plates 11a and 11b come into contact with the outer periphery of the cord. Cutter 13 even if it keeps rotating when it touches
The cuts in a and 13b do not proceed any further,
Keeps rotating in synchronization with the drive plate 9.

In this state, when the rotation is stopped and the cord is pulled in the longitudinal direction, the outer cut having a circumferential cut is removed from the cord by being squeezed by the cutters 13a and 13b.

When the drive plate 9 is rotated counterclockwise after the outer skin is removed,
By the action of the force between the pins 12a, 12b and the eccentric groove, the cutters 13a, 13b and the cutter mounting plate 11
a and 11b move radially outward with respect to the center axis, and the cutters 13a and 13b enter a state where a gap is opened. In this state, the code is removed and inserted.

The setting of the cutting depth with respect to the thickness of the outer skin of the cord is determined by setting the protruding length of the cutting edges of the cutters 13a and 13b with respect to the stopper portions 22a and 22b in FIG.

As the cutters 13a and 13b, use the blades of general-purpose cutter knives which are folded to the required length, and replace when the sharpness becomes poor.

Next, a mechanism b) for gripping the cord by the lever operation at the time of cord setting and pulling the cord in the length direction at the time of removing the sheath will be described with reference to the embodiments of FIGS.

The column 15 is provided with a cord through-hole 32, and is connected to the lever 23 by a fulcrum pin 29.

The two pins 27a, 27b are
5 is fixed. The groove-shaped guide 24 is rotatably attached to the lever 23 with a fulcrum pin 29. The slot-shaped guide 24 is provided with two long holes at upper and lower positions.
The rectangular pipe 25 is guided inside the groove movably in the length direction by the amount of the long hole by a and 27b.

The rectangular pipe 25 has a round hole 33 through which a cord passes. The pin 27a and the pin 30 provided on the lever 23 are connected to a link 28, and serve to connect the rectangular pipe 25 and the lever 23.

The pin 31 and the pin 27a fixed to the column 15
And a coil spring 35 is attached, and the rectangular pipe 25 comes into contact with the column 15 by the spring force. The coil spring 34 is provided connecting the pin 29 and the pin 27a, and has a function of lifting the rectangular pipe 25 upward with respect to the groove guide 24.

To set the cabtire cord, the lever 23 is moved upward. With this operation, the rectangular pipe 25 is pushed down by the link 28. As a result, the round hole 33 of the rectangular pipe 25 is pushed down with respect to the groove guide 24, and the entire round hole is exposed.

In this state, a code is inserted. When the lever is returned, the rectangular pipe 25 is pulled up by the action of the coil spring 34, and the round hole 33 and the groove guide 24 of the rectangular pipe 25 are formed.
The cord is sandwiched between the end portions 26 and is held without rotating during the operation of the rotary cutter.

After the cutting of the cord outer skin with the cutter is completed, the lever is pushed down to pull the cord in the length direction.

When the lever is pushed down, a force is generated by the action of the link 28 to push up the rectangular pipe 25 against the grooved guide 24, and this increases the pinching force of the cord.

Since the movement of the rectangular pipe 25 with respect to the groove guide 24 is hindered by the pinched cord, when the lever 23 is further depressed, the groove guide 24 and the square pipe 25 move around the fulcrum pin 29 with respect to the column 15. Rotate. As a result, the cord has a portion of the outer skin fixed with a cutter, so that it is pulled lengthwise and the outer skin to be removed is ironed out.

In FIG. 7, as the angle θ is set smaller, the component force in the sliding direction increases and the pinching force of the cord increases. Set θ so that no slip occurs when the cord is pulled.

As shown in FIG. 8, the rectangular pipe 25 and the end 26 of the groove guide 24, that is, the cord sandwiching section may be provided on the side close to the column. Further, the groove guide may be provided on both sides, but in this case, the groove guide 24 has a square shape.

As shown in FIG. 9, the rectangular pipe 25 need not be a pipe but may be a block material. In any case, one member sandwiching the cord is rotatably connected to the fulcrum of the lever by sharing a support and a pin, and the other member is pin-connected to the lever by a link having an angle θ. The structure is such that it slides relatively by means such as holes.

FIG. 10 shows an embodiment of a cord-covering stripper in which a mechanism for opening and closing the cutter and a mechanism for applying the blade pressure and sandwiching and ironing the cord are integrated.

[0040]

According to the cutting mechanism of the cutter into the outer cover of the cord, the rotational force of the cutter driving plate for rotating the cutter is used, and the moving force toward the center of the shaft is applied to the rotary cutter by using the pin and the eccentric groove. Generates cutting force into the outer skin.

Further, by rotating the driving plate in the reverse direction, the two cutters can be opened and the cord can be easily attached and detached.

As a result, the structure of the device can be simplified, the manufacturing cost of the device can be reduced, and the operation of removing the outer coat of the cord can be simplified, and the efficiency of mass production can be improved.

Further, since a blade for a general-purpose cutter knife can be used as the blade, a reduction in the running cost of the apparatus can be expected.

Regarding the fixing and pulling mechanism of the cord,
Pulling up the lever makes it possible to attach the cord, prevents rotation of the cord by the spring force, increases the pinching force of the cord by pulling down the lever, grips the cord without slipping, and simultaneously pulls out the cord with a small force. The mass production efficiency of the removal can be further increased.

This lever mechanism can be applied to the known rotary blade type code stripper shown in FIGS.
By combining with the rotary cutter opening / closing and pressurizing mechanism shown in FIG. 7, the efficiency of mass productivity can be improved. FIG. 10 shows the configuration in this case.

[Brief description of the drawings]

FIG. 1 is a side view of a conventional example.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a side view of the opening / closing and pressing mechanism of the cutter according to the present invention.

FIG. 4 is a front view of FIG. 3;

Fig. 5 Cutter stopper

[Fig. 6] Cord sandwiching and ironing mechanism

FIG. 7 is a side view of FIG. 6;

FIG. 8 is a further embodiment of the present invention.

FIG. 9 shows a further embodiment of the present invention.

FIG. 10 is an overall view of the present invention, an embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade tool 2 Blade pressure spring 3 Blade opening / closing cam 4 Blade opening / closing lever 5 Blade mounting plate 6 Rotating disk 7 Code 8 Disk 8 Disk 9 Drive plate 10 Drive belt 11a, 11b Cutter mounting plate 12a, 12b Pin 13a, 13b Cutter 14 Cutter guide 15 Support 16 Cord 17 Spacer 18 Hollow shaft 19 Brake pad 20 Panel 21 Base 22a, 22b Stopper 23 Lever 24 Groove guide 25 Square stopper 26 End of groove guide 27a, 27b Pin 28 Link 30 pin 31 Pin 32 Code Through hole 33 Round hole 34 Coil spring 35 Coil spring

Claims (4)

[Claims] In a cord stripper, a rotary cutter is used to make a cut on the outer periphery of a cord and removes a part of the cord by pulling the cord in a longitudinal direction. Combined with two cutter mounting plates that are guided by the provided cutter guide portion and can move in the radial direction and have eccentric grooves, a pair of cutters mounted on the cutter mounting plate, and the eccentric grooves of the cutter mounting plate The disk has two fixed pins, a brake pad that gives rotational resistance to the disk, and a hollow shaft that is the axis of the drive plate and the disk. The cutter moves in the radial direction in accordance with the forward and reverse rotation of the drive plate. Cover stripper for cabtire cord that opens and closes the cutter and applies a load to the cutter. 2. The coated stripper for a cabtire cord according to claim 1, wherein the blade of the rotary cutter is constituted by a replaceable blade of a general-purpose cutter knife. 3. A cord stripper, in which a cut is made on the outer periphery of the cord with a rotary cutter and a part of the cord is removed by pulling the cord in the length direction, the cord is stripped rotatably around a lever and a fulcrum pin. Props,
It has a mechanism for pinching a cord to the ends of two members that slide on each other by a pin and a long hole, and one end of one member is connected to a lever by a fulcrum pin, and the other member is a link having a fixed angle. When the lever is moved to one side, the link is moved and the two clamping members slide relatively to each other to expand the cord clamping part, allowing the cord to be inserted and returning the lever. When the cord is clamped by the spring force and the lever is moved in the opposite direction, the link moves to cause the two clamping members to be slightly displaced from each other. A cord holding, ironing mechanism that pulls in the length direction. 4. A covering stripper mechanism for a cabtire cord according to claim 1, wherein the cord holding and ironing mechanism is constituted by the mechanism according to claim 3.