JPH1080034A - Compression cutting pliers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compression cutting pliers applying a toggle mechanism with excellent operability capable of compressing even a work to be compressed of dissimilar section without damaging the operability. SOLUTION: A compression cutting pliers are provided with a stopper mechanism 37 in the first handle 32 to restrict the rotation of a rotary die 36 at the position where each recessed part 36a of the rotary die 36 is opposite to a recessed part 33a of ajaw part 33, and the stopper mechanism 37 comprises a recessed part 38 having an inner surface 38a along the direction orthogonal to the rotational direction of the rotary die 36 and an engagement piece 39 having an engagement part 39a which is attachably inserted in the recessed part 38 of the first handle 32 and abutted on the inner surface 38a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to compression pliers for compressing an object to be compressed, such as a crimp terminal or a crimp connector, which is crimped to an electric wire.

[0002]

2. Description of the Related Art Various types of compression pliers for compressing an object to be compressed have conventionally been proposed. For example, the compression pliers 1 shown in FIG. 8 are connected to the tips of the first handle 2 and the second handle 3 which are connected to each other via a connecting plate 4 so as to be capable of being connected to each other. First
And the rear ends of the second die 6 and the second die 6 are swingably connected to each other.

[0003] A plurality of recesses 7a which are combined with each other and define compression holes 7 of different sizes are provided on opposing surfaces on the distal end side of the first and second dies 5, 6 respectively. I have. In order to compress an object to be compressed, for example, a compression connector, by the compression pliers 1 configured as described above, first, the first and second handles 2 and 3 are swung in a direction in which their rear ends are separated. As a result, these handles 2, 3
The front ends of the dies 5 and 6 are moved in the approaching direction, and the rear ends of the first and second dies 5 and 6 connected thereto are also brought close together, so that the front ends of the dies 5 and 6 are mutually moved. The compression hole 7 is moved in the direction in which the compression hole 7 is separated from the compression hole 7.

After selecting a compression hole 7 that matches the compression connector to be compressed from the expanded compression holes 7 and inserting the compression connector, both the handles 2 and 3 are brought close to each other so that the rear ends thereof are close to each other. By applying force to the handles 2, 3, the tips of the dies 5, 6 are closed, the diameter of the compression hole 7 is reduced, and the compression connector is compressed. In this case, since the dies 5 and 6 have a structure in which the diameter of the compression hole 7 is reduced while being equally oscillated with respect to the connecting plate 4, the compression connector which is the object to be compressed is compressed. Compressed without being rotated in the hole 7.

However, in this type of compression pliers 1, two handles 2, 3 which are swingably connected to each other are used.
In order to increase the compressive force and reduce the force applied to the handles 2 and 3 by the lever, the two handles 2 and 3 are used. 3 to the handles 2, 3 and the dies 5, 6
It is necessary to shorten the length from the connecting portion 8 of the handles 2, 3 to the connecting portions 9, 10, and to increase the length from the connecting portion 8 of the handles 2, 3 to the rear end of the handle 2, 3. Therefore, in order to obtain a large compressive force with a small force, it is necessary not only to swing the long handles 2 and 3 at a large swing angle, but also to make the worker It was necessary to apply force to the edge.

Therefore, in this kind of compression pliers 1,
It is premised that the operation is performed with both hands, and it is necessary to hold the crimp connector in the compression hole 7 by hand until the compression of the crimp connector is started. In such a case, there is a disadvantage that the operability is poor.

In order to prevent such inconvenience, compression pliers using a toggle mechanism have been proposed. As shown in FIGS. 9 and 10, this kind of compression pliers 11 includes a first handle 12 and a jaw 13 which are swingably connected to each other, and which is swingably connected to the jaw 13. The second handle 14, the first handle 12 and the second
A four-link structure including an intermediate link 15 that is swingably connected to the handle 14 of the vehicle, respectively. The two handles 12, 14 are brought close to each other, and two connecting shafts 16, 17 at both ends of the intermediate link 15 and a jaw. There is a toggle mechanism that generates an extremely large torque on the jaw 13 when the connecting shaft 18 between the handle 13 and the second handle 14 is arranged in a straight line.

As shown in FIG. 9, a recess 13a is formed at the tip of the jaw 13, while the first handle 1
2 is provided with a rotating die 19 having a plurality of recesses 19a having different dimensions at intervals in the circumferential direction. Then, a compression hole 20 formed by making the recess 13 a of the jaw 13 face any one of the recesses 19 a of the rotary die 19.
By applying a force in a direction in which the two handles 12 and 14 approach each other by placing the compression connector in the
19a can be compressed.

The rotary die 19 is connected to the connecting shaft 2 of the jaw 13.
The click mechanism is mounted on the first handle 12 so as to be rotatable about a rotation axis 22 parallel to the first shaft 1 and is stopped at a position where each recess 19 a is opposed to the recess 13 a of the jaw 13. 23.
As shown in FIG. 10, the click mechanism 23 has the same number of positioning holes 24 as the number of the recesses 19a provided on the side surface of the rotary die 19, and the positioning holes 24 at positions where the recesses 13a and 19a face each other. 24, the receiving hole 25 provided in the first handle 12 and the ball 2 accommodated in the receiving hole 25.
6 and urging means 27 for urging the ball 26 in the direction of the rotating die 19.

Accordingly, the operator selects the recess 19a of the rotary die 19 in accordance with the size of the crimp connector to be compressed, and rotates the rotary die 19 so that the recess 19a faces the recess 13a of the jaw 13. 19 is rotated. As a result, the ball 26 housed in the housing hole 25 is protruded in the direction of the positioning hole 24 provided in the rotary die 19 by the urging means 27, and engages with the opening edge 24a of the positioning hole 24. , The rotary die 19 is positioned at an appropriate position.

According to the compression pliers 11 of this type, unlike the compression pliers 1 based on the above-described leverage principle,
Since the toggle mechanism is used, the handles 12, 14
Since the force applied to the handle 12 and 14 can be very small, there is no need to operate the rear ends of the handles 12 and 14 with both hands, and there is an advantage that the hands can be operated near the root of the handles 12 and 14 with one hand.

[0012]

However, in the compression pliers 11 to which the toggle mechanism is applied as described above, the jaw 1
Since the third recess 13a is brought close to the recess 19a of the rotary die 19 fixed to the tip of the first handle 12 so as to draw an arc, depending on the state of the compression connector at the start of compression. May cause a rotating moment to act on the rotating die 19. In particular, recently, it has been considered to adopt a compression connector having a modified cross section, for example, a compression connector having a C-shaped cross section. Since the contact position with the rotary die 19 changes, there is a possibility that unless the compression connector is carefully installed in the compression hole 20, there is a high possibility that a rotational moment is generated in the rotary die 19 by the compression connector.

In this case, the rotary die 19 is temporarily fixed to the first handle 12 by the click mechanism 23, but the rotation die 19 engages a part of the ball 26 with the opening of the positioning hole 24. Since the rotation is performed by hooking on the edge 24a, when a large rotational moment acts on the rotary die 19, the rotary die 19 easily comes off. In order to prevent this, the urging force of the urging means 27 for urging the ball 26 into the positioning hole 24 is strengthened, so that the ball 26 is more strongly positioned in the positioning hole 2.
4 may be engaged. However, in this case, the force required to rotate the rotary die 19 when the operator selects the size of the recess 19a is increased, and the operability is deteriorated. .

If the rotary die 19 rotates during the compression operation, the compression connector will be compressed at an improper position. In this case, complete crimping between the compression connector and the electric wire cannot be obtained, and the compression connector is compressed, so the wire must be cut and a new compression connector must be crimped. This causes waste of the compression connector. Further, if incomplete crimping between the compression connector and the electric wire is overlooked, there is a disadvantage that it may cause problems such as subsequent disconnection or poor contact.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and in a compression pliers to which a toggle mechanism having good operability is applied, an object to be compressed having an irregular cross section can be compressed without impairing operability. It is an object of the present invention to provide a compression pliers that can perform compression.

[0016]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a rotary die in which a plurality of recesses having different dimensions are formed on a peripheral surface at intervals in a circumferential direction so as to be rotatable. A first handle and a compression hole that is swingably connected to the first handle and that is combined with any one of the recesses of the rotary die to compress an object to be compressed therebetween. A jaw having a fixed recess defining a second handle pivotally coupled to the jaw; and a second handle pivotally coupled to the second handle and the first handle, respectively. An intermediate link, and a toggle mechanism constituted by the first handle, the jaw, the second handle, and the intermediate link moves the object to be compressed between the recess of the rotary die and the recess of the jaw. Compression pliers for compressing,
The first handle is provided with a stopper mechanism for restraining rotation of the rotating die at a position where each recess of the rotating die faces the recess of the jaw, and the stopper mechanism is provided on the rotating die. An engagement having a concave portion having an inner surface along a direction orthogonal to the rotation direction of the rotary die, and an engaging portion attached to the first handle so as to be fittable in the concave portion and brought into contact with the inner surface of the concave portion. A compression pliers consisting of one piece is proposed.

Further, in the above-mentioned compression pliers, a biasing means may be provided for biasing the engaging portion of the engaging piece in a fitting direction of the rotary die into the concave portion. Further, concave portions of the rotary die are provided on a peripheral surface of the rotary die at intervals in a circumferential direction, and the engaging pieces are pivotally movable about an axis parallel to a rotation axis of the rotary die. It is also effective as a lever attached to the handle.

In addition, a concave portion of the rotary die is formed in a side surface of the rotary die in parallel with a rotation axis of the rotary die, and the engaging portion is linearly movable in parallel with a rotation axis of the rotary die. The stopper mechanism may be a pin provided, and the stopper mechanism may be a ratchet mechanism that allows only a rotating operation of the rotating die in a direction opposite to a swing direction of the jaw when compressing the object to be compressed. Good.

[0019]

According to the compression pliers of the present invention, the operator
The size of the recess of the rotary die is selected according to the size of the object to be compressed. At this time, since the rotation of the rotary die is restricted by the stopper mechanism, the operator releases the operation of the stopper mechanism to rotate the rotary die, and the desired recess faces the recess of the jaw. In the position, the rotation of the rotating die is restrained by activating the stopper mechanism again. In this state, the object to be compressed is compressed by placing the object to be compressed in the compression hole formed between the recesses and simultaneously grasping the first handle and the second handle. Become.

In this case, the stopper mechanism engages the concave portion provided in the rotary die with the engaging portion of the engaging piece attached to the first handle, thereby allowing the rotary die to move with respect to the first handle. The rotation is locked. However, since these engagements bring the inner surface of the concave portion orthogonal to the rotation direction of the rotary die into contact with the engagement portion fitted therein, the rotation torque is applied to the rotary die. Does not act on the engagement portion in the direction away from the recess, the engagement state is maintained. Therefore, it is possible to reliably prevent the rotary die from rotating during compression, and to compress the object to be compressed into an appropriate state.

Further, in the above-mentioned compression pliers, if an urging means for urging the engaging portion of the engaging piece in the direction of fitting into the concave portion of the rotary die is provided, the operator can reduce the size of the concave portion of the rotary die. When selecting the engaging piece, a force is applied to the engaging piece in a direction to remove the engaging portion from the recess against the urging force of the urging means, and the rotating die is rotated to open the engaging piece, and the rotation is performed. The die can be fixed to the first handle, and workability can be improved.

In this case, the concave portions of the rotary die are provided on the peripheral surface at intervals in the circumferential direction, and the engaging pieces are attached to the first handle so as to be swingable about an axis parallel to the rotation axis of the rotary die. With a lever, the operator can swing the lever to engage or disengage the lever with the concave portion of the rotary die, and can reliably compress the compressed object by a simple operation. It becomes possible.

Further, a recess may be formed in the side surface of the rotary die in parallel with the rotation axis thereof, and the engaging portion may be a pin provided to be linearly movable in parallel with the rotation axis of the rotary die. Only by doing so, the pin and the concave portion of the rotary die can be engaged and released.

Further, if the stopper mechanism is a ratchet mechanism that allows only the rotation of the rotary die in the direction opposite to the swinging direction of the jaw when compressing the object to be compressed, the size of the compression hole is selected. In this case, it is possible to rotate the rotating die in a rotatable direction, and to restrict the rotation of the rotating die in the same direction as the swinging direction of the jaw during compression.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a compression pliers according to the present invention will be described below with reference to FIGS.
The compression pliers 31 according to the present embodiment employs a toggle mechanism similarly to the conventional compression pliers 11 shown in FIG. 9, and mainly includes a first handle 32 and a swinging motion of the first handle 32. A jaw 33 that is movably connected, a second handle 34 that is swingably connected to the jaw 33, and a swingable connection to the first and second handles 32, 34, respectively. The intermediate link 35 and the first handle 32
And a rotary die 36 rotatably mounted on the rotating die 36.

However, the compression pliers 31 according to the present embodiment
Is different from the conventional compression pliers 11 in that a stopper mechanism 37 is employed instead of the click mechanism 23 that restricts the rotation of the rotary die 36. The stopper mechanism 37 includes a concave portion 38 formed on the peripheral surface of the rotary die 36 at an interval, and an engaging portion 39a which is swingably attached to the first handle 32 and can be fitted into the concave portion 38. And a torsion coil spring 40 which constantly urges the lever 39 in a direction in which the engaging portion 39a is engaged with the concave portion 38.

The concave portion 38 is located at a position between the plurality of concave portions 36a on the peripheral surface of the rotary die 36,
, And the inner surface thereof is disposed so as to be substantially perpendicular to the rotation direction of the rotating die 36, that is, substantially along the radial direction. The lever 39 is attached so as to be swingable about an axis 41 provided adjacent to the rotation axis in parallel with the rotation axis of the rotary die 36. The engaging portion 39a is
Is formed integrally with the front end of the lever 3 and has a shape that fits snugly in the recess 38.
When the rotary member 9 is swung, the rotary die 36 is brought close to the rotary die 36 in a substantially radial direction.

Reference numeral 42 in the drawing denotes a recess provided in the first handle 32. The recess 42 is provided at the rear end of the lever 39 when the engaging portion 39a of the lever 39 is engaged in the recess 38 of the rotary die 36. Are designed to protrude into the interior of the housing. That is, the operator swings the lever 39 only by pressing the rear end of the lever 39 in the recess 42, and engages the engagement portion 39 a of the lever 39 with the recess 38 of the rotary die 36. It can be canceled. Also,
Reference numeral 43 denotes a torsion coil spring that urges the second handle 34 in the opening direction from the first handle 32 by pressing the intermediate link 35. In the drawings, a ratchet mechanism used when the first handle 32 and the second handle 34 are brought close to each other is omitted.

The operation of the thus-configured compression pliers 31 according to the present embodiment will be described below. In order to compress an object to be compressed such as the compression connector C with the compression pliers 31 according to the present embodiment, first, as shown in FIG.
4 is swung in the opening direction so that the jaw 3
3 apart.

Next, the stopper mechanism 37 is released and the rotary die 36 is rotated. In this case, the operator presses the rear end of the lever 39 disposed in the recess 42 of the first handle 32 as shown in FIG. The lever 39 is swung (counterclockwise in the figure) against the elastic force, and the engaging portion 39 a provided at the tip of the lever 39 is moved to the concave portion 3 of the rotary die 36.
Extract from 8. As a result, the rotating die 36 is rotatable around its rotation axis, and as shown in FIG.
By rotating the rotary die 36 until it is disposed at a position facing the recess 33a of the
The size of the compression hole 44 formed by a is set. Then, when the user releases his / her hand from the lever 39 at an appropriate position, the lever 39 is swung by the elastic force of the torsion coil spring 40, and the engaging portion 39 at the distal end of the lever 39 is engaged.
a is fitted into the concave portion 38 of the rotating die 36,
Is restricted.

Here, in the compression pliers 31 according to the present embodiment, the concave portion 38 provided in the rotary die 36 has an inner surface 38a substantially perpendicular to the rotation direction, and the engagement of the tip of the lever 39 with the inner surface 38a. Since the lever 39 has a structure in which the lever 39 abuts, even if a rotational moment acts on the rotary die 36 in a state where the engaging portion 39a of the lever 39 is engaged with the concave portion 38, the lever 39 has a concave portion. No force acts in the direction of releasing the engagement with the rotating die 38, and the rotating die 36 is
It will be maintained in a securely fixed state. As a result, for example, as shown in FIG. 4, even when compressing a deformed object such as a compression connector C having a C-shaped cross section, the shape of the compression hole 44 is maintained and an appropriate compression operation is performed. It can be performed.

A recess 38 provided in the rotary die 36;
The stopper mechanism 37 is constituted by the lever 39 attached to the first handle 32 and the torsion coil spring 40 for applying an urging force to the lever 39. The object to be compressed can be appropriately compressed. Further, the engagement between the lever 39 and the rotary die 36 can be released by a one-touch operation only by swinging the lever 39, and the operation is also easy.

Next, a second embodiment of the compression pliers according to the present invention will be described with reference to FIGS.
The compression pliers 51 according to the present embodiment includes a stopper mechanism 52.
Is different from the compression pliers 31 according to the first embodiment. In the compression pliers 51 of the present embodiment, portions having the same configuration as the compression pliers 31 of the above-described first embodiment are denoted by the same reference numerals, and description thereof will be simplified. The stopper mechanism 52 of the compression pliers 51 according to the present embodiment includes a plurality of positioning holes 5 formed in the surface of the rotary die 36 in the thickness direction.
3, a through hole 54 formed in the first handle 32,
It comprises a pin 55 slidably disposed in the through hole 54 and inserted into the positioning hole 53 and a coil spring 56 for urging the pin 55 in the direction of the rotary die 36.

In the compression pliers 51 configured as described above, the operator selects the size of the compression hole 44 by:
5 with the first and second handles 32, 34 opened.
The pin 55 is pulled out from the positioning hole 53 as shown in FIG. When the rotating die 36 is rotated in this state, the pin 55 comes off the positioning hole 53. By releasing the pin 55 at this time, the tip of the pin 55
The urging force of the coil spring 56 causes the rotary die 36 to contact the surface of the rotary die 36.

When the rotary die 36 is further rotated, the pin 55 is moved by the urging force of the coil spring 56 at a position where the other positioning hole 53 and the pin 55 coincide with each other, as shown in FIG. The rotary die 36 is inserted into the positioning hole 53 and is fixed to the first handle 32. The positioning hole 53 has an inner surface 53a orthogonal to the rotation direction of the rotary die 36, and the pin 55 inserted into the positioning hole 53 is brought into contact with the inner surface 53a. Similarly, the rotating die 36
Therefore, even when a rotational force acts on the rotary die 36, the rotary die 36 can be reliably held in a fixed state, and the object to be compressed can be appropriately compressed.

Next, a third embodiment of the compression pliers according to the present invention will be described with reference to FIG. The compression pliers 61 according to the present embodiment employs a ratchet mechanism 62 as a stopper mechanism. In the figure, reference numeral 63 denotes a ratchet wheel, and 64 denotes a detent lever.

With the compression pliers 61 configured as described above, the operator can rotate the rotary die 36 in the direction of the arrow with the first and second handles 32 and 34 opened, and the desired size. Can be selected. Then, during the compression work, the ratchet mechanism 62 operates to restrict the rotation of the rotary die 36 in the direction opposite to the arrow. That is, the compression pliers 61 according to the present embodiment.
Is excellent in that the compression work can be extremely easily and effectively optimized when the rotating die 36 tends to rotate in one direction.

In the above embodiment, the lever 39
May be employed as the torsion coil spring 40 for urging the coil spring or a torsion bar. In the second embodiment, the engagement with the rotary die 36 is released by pulling the pin 55, but the insertion direction of the pin 55 and the spring 5
The position of 6 may be changed, and the pin 55 may be pressed to release the engagement with the rotating die 36.

[0039]

As described above in detail, in the compression connector according to the present invention, the engaging piece of the engaging portion is brought into contact with the inner surface of the concave portion provided on the rotary die in the direction perpendicular to the rotation direction. Even when a rotational force acts on the rotary die for some reason during the compression of the object to be compressed, no force acts in a direction in which the engaging portion is disengaged from the concave portion, and the compression hole is held in an appropriate state. This has the effect that the compression work can be optimized. As a result, damage to the object to be compressed due to failure in compression, re-cutting of the cable, and the like can be reliably prevented. In addition, it is possible to prevent an object to be compressed having a poor compression state from being formed without the knowledge of the operator, thereby improving the reliability of the product and preventing an increase in maintenance work. is there.

In addition, if the urging means is provided on the engaging piece, the operator can engage with the concave portion of the rotary die simply by releasing the engaging piece, thereby improving operability. . Even if the stopper mechanism is constituted by any of a lever, a pin, and a ratchet mechanism, it is possible to effectively fix the rotary die with an extremely simple structure.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a first embodiment of a compression pliers according to the present invention.

FIG. 2 is a schematic view showing a state where a handle of the compression pliers of FIG. 1 is opened.

FIG. 3 is a schematic view showing a state in which a rotary die of the compression pliers of FIG. 1 is rotated.

FIG. 4 is an enlarged view showing a case where an object to be compressed having a C-shaped cross section is compressed by the compression pliers of FIG. 1;

FIG. 5 is a longitudinal sectional view showing a stopper mechanism showing a second embodiment of the compression pliers according to the present invention.

6 is a longitudinal sectional view showing the stopper mechanism of FIG.

FIG. 7 is a schematic view showing a third embodiment of the compression pliers according to the present invention.

FIG. 8 is a schematic view showing a conventional compression pliers utilizing the principle of leverage.

FIG. 9 is a perspective view showing a conventional compression pliers using a toggle mechanism.

FIG. 10 is a longitudinal sectional view showing the click mechanism of FIG. 9;

[Explanation of symbols]

 31, 51, 61 Compression pliers 32 First handle 33 Jaw 33a Recess 34 Second handle 35 Intermediate link 36 Rotary die 36a Recess 37, 52, 62 Stopper mechanism 38 Recess 38a, 53a Inner surface 39 Lever (engagement) Piece) 39a engagement portion 40 torsion coil spring (biasing means) 44 compression hole 53 positioning hole (recess) 55 pin (engagement piece) 62 ratchet mechanism C compression connector (compressed object)

Claims (5)

[Claims] A first handle for rotatably mounting a rotary die having a plurality of recesses having different dimensions formed on a circumferential surface at intervals in a circumferential direction; A jaw coupled to and having a fixed recess in combination with any one of the rotating dies to define a compression hole therebetween for compressing an object to be compressed; A second handle swingably connected to the second handle and an intermediate link respectively swingably connected to the second handle and the first handle; Compression pliers for compressing an object to be compressed between a concave portion of a rotary die and a concave portion of a jaw by a toggle mechanism constituted by a second handle and an intermediate link, wherein the first handle includes: Rotary die recesses face the jaw recesses A stopper mechanism for restraining rotation of the rotary die in a position canceller is provided, the stopper mechanism includes a recess having an inner surface along a direction perpendicular to the direction of rotation of the rotary die to the rotary die, the first
Compression pliers, the engagement pliers being fitted to the handle so as to fit into the recess, and having an engagement portion to be brought into contact with the inner surface of the recess. 2. The compression pliers according to claim 1, further comprising: urging means for urging the engaging portion of the engaging piece in a direction in which the rotary die is fitted into the concave portion of the rotary die. 3. A concave portion of the rotary die is provided on a peripheral surface of the rotary die at intervals in a circumferential direction, and the engaging piece can swing around an axis parallel to a rotation axis of the rotary die. The compression pliers according to claim 1 or 2, further comprising a lever attached to the first handle. 4. A concave portion of the rotary die is formed in a side surface of the rotary die in parallel with a rotation axis of the rotary die, and the engaging portion is linearly movable in parallel with a rotation axis of the rotary die. 3. The compression pliers according to claim 1, wherein the compression pliers are provided pins. 5. The apparatus according to claim 1, wherein the stopper mechanism is a ratchet mechanism that allows only a rotating operation of the rotary die in a direction opposite to a swinging direction of a jaw when compressing an object to be compressed. Or the compression pliers according to claim 2.