JPH03104568A - Motor-driven terminal pressure fixing tool - Google Patents

Abstract

PURPOSE:To shorten the whole length of a pressure fixing tool by disposing a pressure fixing member with an angle within 45 deg. to the axial line of a driving shaft. CONSTITUTION:A link plate 6 is linearly moved in the right-angled direction to the axial line of a driving shaft 43 by a plate cam 5 rotated by a driving mechanism 4, and the toggle link 33 of a pressure fixing member 3 is pressed to close edge plates 34, 34, a connecting terminal pinched between the edge plates 34, 34 is pressed and fixed. As this rotating directional load of the plate cam is received by the link plate 6, only the pressing force for opening acts on the toggle link 33. At this time, the pressure fixing member 3 is disposed on the top part of a case 1 at an angle of 45 deg. to 135 deg. to the axial line of the driving shaft 43.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hand-held electric terminal crimping tool used for crimping connection terminals to electric wires. [Prior Art] When crimping connection terminals to electric wires, electric terminal crimping tools have been widely used for the purpose of crimping easily and uniformly without requiring grip or arm strength. As an electric terminal crimping tool, one described in Japanese Utility Model Application Publication No. 1884 (1984) is known. The electric terminal crimping tool disclosed in this publication consists of a toggle link that opens when pressed at the tip of a hand-held case, and a pair of openable/closable toggle links whose base ends are pivoted to both ends of the toggle link. It has a crimping member consisting of a scissor-shaped blade plate, and the plate cam attached to the drive shaft of the drive mechanism is brought into contact with the center of the toggle link, the toggle link is opened, the blade plate is closed, and the crimping operation is performed. This is what we do. An electric terminal crimping tool with such a configuration uses a plate cam to flip open a toggle link. For example, an electric terminal crimping tool has a configuration in which a crimping member is opened and closed by moving a screw nut threaded onto a screw shaft. It has the advantage that the overall length can be shortened compared to the previous one, and the crimp strength can be easily adjusted by replacing the plate cam. [Problems to be Solved by the Invention] However, in the crimping tool having the above configuration, the blade plate of the crimping member is arranged at the tip of the case in the axial direction of the drive shaft, and the crimping part of the crimping member is located at the tip of the case. It protrudes at the tip. Therefore, the overall length is still quite long, and when you hold the case with one hand and insert the connection terminal into the crimping part with the other hand and perform crimping work, both hands are far apart, making it easy to lose balance and make it difficult to work stably. ．． In particular, hand-held electric terminal crimping tools have a built-in battery, prime mover, etc., and are quite heavy, so the closer your hands are to each other, the easier it is to balance and crimping work. In addition, in the conventional crimping tool, the toggle link is directly driven by the plate cam, and if a load is applied to the toggle link in the rotational direction of the plate cam, that is, a lateral load, the retoggle link may not operate smoothly. However, there is also the problem that it is easily damaged. The present invention has been made in order to solve such problems, and provides an electric terminal crimping tool that is small and has excellent workability, has a toggle link that operates smoothly, and is less likely to be damaged. The purpose is to [Means for Solving the Problems] The present invention provides a battery housed in a hand-held case;
a drive mechanism consisting of an electric motor and a speed reduction mechanism thereof; a plate cam pivotally attached to the drive shaft of the drive mechanism; and a link plate that moves linearly in a direction perpendicular to the axis of the drive shaft by the plate cam; a conversion mechanism that converts rotational motion of the shaft into linear motion; and a conversion mechanism that is disposed at the front end of the case at an angle of 45° to 135" with respect to the axis of the drive shaft, and is pressed by the link plate. Means for solving the above problems with a configuration comprising: a toggle link that operates to open a butterfly; and a pair of scissor-shaped blade plates whose base ends are pivoted to both ends of the toggle link; [Operation] A plate cam rotated by the drive mechanism causes the link plate to move linearly in a direction perpendicular to the axis of the drive shaft, and this link plate presses the toggle link of the crimping member to close the blade plate. , the connection terminal sandwiched between the blade plates is crimped.The link plate receives the load in the rotational direction of the plate cam, and only the pressing force for opening the butterfly acts on the toggle link. An embodiment of the invention will be described with reference to the drawings.The drawing shows an embodiment of the invention, and the hand-held case l has a cylindrical grip part 11 located approximately in the center, and a cylindrical grip part 11 located at the base end thereof. It is composed of a housing portion l2 for the battery 2 formed, a bulging portion 1-3 formed at the tip, and a mounting case l4 for the crimping member 3 continuously formed below the bulging portion l3. A drive mechanism 4 consisting of an electric motor 4l consisting of a DC motor and a deceleration mechanism 42 for the electric motor 4l is housed inside the grip part 11. Also, a drive shaft of the drive mechanism 4 is protruded into the inside of the bulge l3 of the case l. A plate cam 5 having a front oval shape is pivotally attached to the tip of the bulge l3, and grooves extending in a direction perpendicular to the drive shaft 43 are formed on the inner surfaces of the side walls 15. 16, 1B
A link plate 6 having substantially L-shaped sides is slidably disposed in these grooves 16, 16 by fitting its side edges. This link plate 6 together with the plate cam 5 constitutes a conversion mechanism 7 that converts the rotational motion of the drive shaft 43 into linear motion. That is, the planar inner surface, that is, the upper surface of the protrusion 6l protruding from the lower end of the link plate 6 becomes the contact surface 62 of the plate cam 5, and comes into contact when the plate cam 5 rotates and its longer diameter side is located downward. Press 62 to move the link plate 6 into the groove 1.
5, move it downward along 15. Also, link board 6
The outer surface, that is, the lower surface of the protruding piece 6l forms an abutment part 63 for the crimping member 3, which is a slope sloped upward. It is loosely tightened. On the other hand, the crimping member 3 disposed in the mounting case 14 has almost the same configuration as that conventionally known, and has an angle of 120° with respect to the axis of the drive shaft 43 at the tip of the mounting case 14. A pair of link members 31. Toggle link 3 connecting 31 with shaft 32
3, and a shaft 36.3 whose proximal end portions are each pivotally attached to both ends of the toggle link 33, and whose intermediate portion is rotatably attached to the mounting portion l4. It consists of a pair of scissor-shaped blade plates 34, 34 which are pivoted by a shaft 36 and arranged in the front and rear.
When the roller 35, on which the roller 35 is pivoted, is pushed by the contact portion 63 of the link plate 6 and moves downward, the toggle link 33 opens and closes the blade plates 34, 34. Further, the blade plate 34 located at the rear is biased in the closing direction by a tension spring 81 disposed within the small diameter cylindrical body 17 installed between the tip of the mounting portion l4 and the tip of the housing portion l2 of the case l. The point of action of a lever 83 pivoted to the mounting portion 14 is in contact with the mounting portion of the tension spring 8l of the blade plate 34. Furthermore, in the drawing, reference numeral 82 is a manual lever, reference numeral 9l is a switch disposed on the side of the grip l1, and reference numeral 92 is an electronic controller for controlling the drive mechanism 43.
The drive shaft 43 is controlled so that it rotates once when is pressed.
Further, reference numeral 93 indicates an indicator light indicating the operating state, etc., and reference numeral 94
is a switch for reversing the drive mechanism 43 when the drive mechanism 43 stops with the connection terminals being engaged with the blade plates 34, 34. To use this embodiment having the above configuration, first grasp the grip portion 11 of the case l with one hand.
At this time, as shown in FIG. 3, the point of action 5l, which is the longer diameter side edge of the plate cam 5, is in an upper position and is separated from the link plate 6. Next, when the manual lever 82 is pulled in the direction of the grip part 11 with, for example, the index finger of the hand while gripping the grip part 11, the lever 83 rotates clockwise as shown in FIG. The tips of the two blade plates 34, 34 are opened by rotating the plate 34 counterclockwise against the biasing force of the tension spring 8l. Then, with the other hand, insert the connecting terminal 96 with the tip of the electric wire 95 inserted into the recess 34a formed inside one of the blade plates 34, release the manual lever 82, and use the biasing force of the tension spring 81 to force the blade again. The plates 34, 34 are closed to hold the connection terminal 96. Then, when the switch 9l is pressed with, for example, a thumb, the plate cam 5 is rotated once by the drive mechanism 4. At this time, as shown in FIG.
When l is located on the crimp member 3 side, the plate cam 5 pushes the contact surface 62 of the protruding piece 61 of the plate link 6 to move it toward the crimp member 3. Therefore, the contact portion 63 of the protrusion 6l touches the roller 35.
Press to open the toggle link 33, so that the blade plate 3
A tightening force is generated in the closing direction at 4 and 34, and the connection terminal 9
6 is crushed and the connecting terminal 96? ! LA95 will be crimped. Next, the manual lever 82 is pulled again to open the blade plates 34, 34, and the crimped connection terminal 96 is taken out to complete the crimping operation. In this embodiment, the crimping member 3 is arranged in a direction that intersects the axis of the drive shaft 43, so the whole is small and easy to balance during work.Moreover, since the battery is housed, it is extremely easy to use. It can perform crimping work, and is especially suitable for work in high places and narrow spaces. In addition, since it is an electric type and the plate cam 5 that is pivoted on the drive shaft 43 closes the blade plates 34, 34 that are pivoted on the toggle link 33 for crimping, the crimping is done evenly and uniformly. It was done,
In particular, since the toggle link 33 is configured to be pushed by the plate cam 5 via the link plate 6, the plate cam 5 presses the link plate 6 smoothly, and the plate cam 5 and the rotating roller 35 are not unevenly worn. ．． Furthermore, the crimping member 3 is connected to the drive shaft 4
3 and at an angle of approximately 120° with respect to the axis of the case 1, the hand that grips the grip 11 of the case 1 and the hand that inserts the connection terminal 96 into the crimp member 3 Since the two terminals are close together, it is easy to insert the connecting terminal 96, and the work efficiency is extremely high. In this embodiment, the angle between the crimp member 3 and the axis of the drive shaft 43 is approximately 120 degrees; As the moving distance of the toggle link 33l is short relative to the moving distance of the link plate 6, the pressing force decreases, making it difficult to open the butterfly effectively. Therefore, in the present invention, the angle at which the crimping member 3 is arranged with respect to the axis of the drive shaft is set at 45° to 135° in consideration of overall miniaturization and force efficiency. Also,
The link plate 60 abutting portion 63 according to the arrangement direction of the crimping member 3
Needless to say, the direction of inclination and the angle of the crimping member 3 can be adjusted, and it is optimal that the direction in which the crimping member 3 is arranged and the contact portion 63 are perpendicular to each other. Therefore, when the arrangement angle of the crimping member 3 is a right angle, the contact portion 63 of the protruding piece 6l of the link plate 6 becomes a flat surface, and the arrangement angle of the crimping member 3 is inclined toward the base end side of the case l. In some cases, the contact portion 63 becomes a slope inclined toward the proximal end. [Effects of the Invention] In the present invention having the above configuration, since the crimping member is arranged at an angle of 45° or less with respect to the axis of the drive shaft, the crimping member can be arranged without protruding toward the front of the case. Therefore, the overall length can be shortened, making it easy to balance during work and extremely convenient to use.In particular, since the toggle link is pushed by the plate cam via the link plate, the plate cam does not press the toggle link. It operates smoothly and has excellent durability, with no uneven wear or damage to parts.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view, FIG. 2 is an enlarged side view with a part cut away, and FIGS. 3, 4, and 5 are in use. A-A in Figure 2
A cross-sectional view taken along the line, and FIG. 6 is an enlarged partial view showing the state in which the crimping member is used. ■...Case, 2...Battery, 3...Crimp member, 33...Toggle link, 34. 34...
・Blade plate, 4...driver 4W. 41... Electric motor, 42... Reduction mechanism, 43... Drive shaft, 5...
Plate cam, 6... Link plate, 7... Conversion mechanism.

Claims (1)

[Scope of Claims] A drive mechanism including a battery, an electric motor, and a speed reduction mechanism for the battery housed in a hand-held case; a plate cam pivotally attached to the drive shaft of the drive mechanism; a conversion mechanism that converts the rotational motion of the drive shaft into linear motion, comprising a link plate that moves linearly in a direction perpendicular to the axis; and a conversion mechanism that converts the rotational motion of the drive shaft into linear motion; A crimping joint consisting of a toggle link that is arranged at an angle and that opens when pressed by the link plate, and a pair of scissor-shaped blade plates whose base ends are pivoted to both ends of the toggle link. An electric terminal crimping tool comprising: a member;