JPH047592Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connection tool used for crimping and connecting a conductive contact to an electric wire.

[Conventional technology]

Conventionally, a wiring tool has been used to connect a conductive contact to an electric wire. A conventional wire connection tool has an anvil 1 and a crimper 3, as shown in FIG.

Normally, with a manual tabletop wiring tool, the electric wire 5 and the contact 7 are connected between the crimper 3 and the anvil 1.
Allocate. The contact 7 is then placed above the anvil 1. When crimping the contact 7 to the electric wire 5, the contact 7 is raised together with the anvil 1, and the electric wire 5 and the contact 7 are crimped using the crimper 3 and the anvil 1 to connect the electric wire 5 and the contact 7. Note that in order to raise the anvil 1, a drive unit (not shown) such as a cylinder in the grasping part 9 of the crimping tool is moved.

[Problem that the invention attempts to solve]

However, when the electric wire 5 and the contact 7 are crimped together, the contact 7 moves upward together with the anvil 1, resulting in a problem that the crimping becomes uncertain.

In addition, from the viewpoint of workability, moving the anvil 1 that positions the contact 7 is
This makes the positioning between the electric wire 5 and the contact 7 uncertain, which is inconvenient.

For this reason, in many wire connection tools, the crimper 3 is moved by various means to improve workability, but the structure is difficult because it uses a combination of a sector gear and a rack, a link structure, etc. becomes complicated, and there are many problems when miniaturizing.

Therefore, an object of the present invention is to provide a wire connection tool that can move a crimper and increase the thrust of a cylinder or the like using simple parts.

[Means for solving problems]

According to the present invention, a cradle provided with an anvil, a crimper mounted to face the anvil, a movable pressurizing section movable in a direction facing the anvil, and a pressurizing mechanism that moves the movable pressurizing section. In the wiring tool, the pressing mechanism engages with a cam movable with respect to the pedestal in the opposing direction, and is pressed and transferred in a direction perpendicular to the opposing direction when the cam moves. a wedge roller, a moving roller that engages with the wedge roller and is pressed and transferred in a direction opposite to the cam when the wedge roller moves, and a moving roller guide that extends in the opposite direction and regulates the moving direction of the moving roller. the movable roller is connected to the movable pressure section, and the movable pressure section has a slide section that is movably guided in the opposite direction by the movable roller guide. You will get the tools.

〔Example〕

1 to 3 show an embodiment of the wiring tool of the present invention.

The illustrated wire connection tool has a cylinder 11 operated by pneumatic pressure as a driving part, and a pressurizing mechanism part 13 connected to one side of the cylinder 11.

The cylinder 11 is provided with a manually operated starting lever 15 and a piston rod 17 that is activated by operating the starting lever 15. The piston rod 17 is provided so as to extend in the longitudinal direction of the cylinder 11 and reach the inside of the pressurizing mechanism section 13. At the tip of the piston rod 17,
A cam 19 is directly connected.

As shown in detail in FIG. 3, the pressure mechanism section 13 is provided with a back up roller 21 fixed to guide the upward movement of the cam 19 in the linear direction. A wedge roller 25 is provided above the cam 19 so as to be in contact with one surface of the fixed wall 23. A gap is formed between the wedge roller 25 and the back-up roller 21, into which the cam 19 fits. A moving roller 2 is disposed diagonally below the wedge roller 25.
7 is provided. The wedge roller 25 and the moving roller 27 are in contact with each other. The moving roller 27 is
The direction of movement is regulated by a moving roller guide 29 extending vertically inside the pressure mechanism section 13 .

A pedestal 34 for receiving the core wire anvil 31 and the covering anvil 33 is provided on the upper surface of the fixed wall 23 (that is, the surface opposite to the surface facing the wedge roller 25). Core wire anvil 31 and covering anvil 3
A conductive contact 35 is placed on top of 3. The contact 35 has a core wire crimping portion that is crimped to the core wire of the electric wire 37 and a covering crimping portion that is crimped to the coated portion of the electric wire 37 . The core wire crimping portion of the contact 37 is placed on the core wire anvil 31 and the covering crimping portion is placed on the covering anvil 33.

Furthermore, the pressurizing mechanism section 13 is provided with a movable pressurizing section 40 . As shown in FIG. 4, a core wire crimper 42 and a covering crimper 44 are attached to the movable pressurizing section 40 so as to face the core wire anvil 31 and covering anvil 33 described above. The movable pressure unit 40 includes a slide unit 41 serving as a coupling device that is movably guided by a movable roller guide 29 in the longitudinal direction of the pressure mechanism unit 13, that is, in the vertical direction.
are integrated. The above-mentioned moving roller 27
is rotatably provided at the bottom of this slide portion 41. A regulation plate 47 is provided at the upper end of the pressure mechanism section 13 to regulate movement of the movable pressure section 40 . A bolt 49 is provided through the regulation plate 47 . This bolt 49 is connected to one end of a return spring (tension spring) 53 inside a vertically extending elongated hole 51 in the movable pressurizing section 40 . The other end of the return spring 53 is engaged with a fixing pin 54.

Next, the operation of this wiring tool will be explained.

First, when the starting lever 15 is pushed toward the cylinder 11, the cam 19, which is directly connected to the piston rod 17 of the cylinder 11, rises along with the piston rod 17. As the cam 19 rises, the wedge roller 25 sandwiched between the cam 19 and the fixed wall 23 enters between the fixed wall 23 and the moving roller 27 while pushing the moving roller 27 downward. Moving roller 27
Since the movable pressurizing section 40 is directly connected to the movable pressurizing section 40, the movable pressurizing section 40 moves downward, which causes the core wire crimper 42 and the covering crimper 44 to also descend, thereby performing a predetermined crimping operation.

Also, by releasing the starting lever 15,
The cam 19 returns, and the wedge roller 25 is also returned to its original position by the return spring 53.

Next, the basic principle of this embodiment will be explained with reference to FIG.

In FIG. 5, α is the cam 19 and the wedge roller 25.
The contact angle between the wedge roller 25 and the moving roller 27, β is
The angle γ is between the straight line connecting the centers of the movable roller guide 29 and the fixed wall 23 and the movable roller guide 2
Shows the angle made with 9. Here, β is the wedge roller 25
It changes depending on the movement of. Note that in FIGS. 1 to 3, γ=90°.

The force F applied to the wedge roller 25 becomes a force F' that acts on the moving roller, and further acts on the moving roller guide 2.
9 is converted into a force in the direction of arrow A. Here, the force F' is obtained from the following equation.

F'=-F cos(β+γ)/sin(α+γ) In FIG. 5, the angles of α, β, and γ are arbitrary as long as they do not restrict the basic movement of the motion.

Therefore, depending on the positional relationship between the moving roller 27 and the wedge roller 25, it is possible to increase the thrust of the cylinder 11, etc.

[Effect of idea]

As explained above using the embodiments, according to the crimping tool of the present invention, since the pressing direction is changed by the wedge roller and the moving roller, reliable connection is possible with simple parts. Become.

[Brief explanation of the drawing]

Figure 1 is a front view of the wiring tool of the present invention when it is in use, Figure 2 is a partially cutaway right side view of the wiring tool of Figure 1 when it is not in use, and Figure 3. The figure is a sectional view showing the pressurizing mechanism of the wire connection tool in Figure 1, Figure 4 is a schematic illustration of the anvil and crimper portion of the wire connection tool in Figure 1, and Figure 5 is a cross-sectional view showing the pressure mechanism of the wire connection tool in Figure 1. Basic principle diagram of the pressure direction changing mechanism, No. 6
The figure is a schematic explanatory diagram of a conventional wire connection tool. 1... Anvil, 3... Crimper, 5... Electric wire, 7... Contact, 11... Cylinder, 13
... Pressure mechanism section, 19 ... Cam, 23 ... Fixed wall, 25 ... Wedge roller, 27 ... Moving roller, 2
9... Moving roller guide, 31... Core wire anvil, 33... Covering anvil, 35... Contact, 37... Electric wire, 40... Movable pressure section, 42...
...Core wire crimper, 44...Coating crimper, 53...
...Return spring.

Claims (1)

[Scope of utility model registration request] In a wire connection tool that includes a cradle provided with an anvil, a crimper mounted to face the anvil, a movable pressure section movable in a direction opposite to the anvil, and a pressure mechanism section that moves the movable pressure section. , the pressing mechanism section includes a cam movable with respect to the pedestal in the opposing direction, a wedge roller that engages with the cam and is pressed and transferred in a direction perpendicular to the opposing direction when the cam moves, and the wedge roller. a moving roller that engages with the roller and is pressed and transferred in a direction opposite to the cam when the wedge roller moves; a moving roller guide that extends in the opposite direction and regulates the moving direction of the moving roller; is connected to the movable pressing section, and the movable pressing section has a sliding section movably guided in the opposing direction by the movable roller guide.