JPH058737Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention applies to cutters for coaxial cables.
More specifically, the present invention relates to a cutter for cutting the jacket, shield braid, core sheath, and core wire of a coaxial cable end to predetermined lengths when connecting the coaxial cable to a terminal or the like.

(Prior art) The inventors first filed Utility Application No. 57-29426.
-134012), we proposed this type of cutter for coaxial cables. As shown in FIG. 8, this cutter is equipped with a cutter main body 41 and a rotatable arm 42 pivotally supported at one end of the cutter body. Each part of the coaxial cable sandwiched between the cutter body 41 and the arm 42 is cut by a plurality of cutter blades 43, each of which is protruded from a notch of a size that matches the diameter. In addition, the cutting length of each part of the coaxial cable is determined using a separately formed gauge 44.
is attached to the cutter body 41 from below, and the end face of the coaxial cable is kept in contact with the gauge plate 45 to maintain a predetermined value.

(Problem to be Solved by the Invention) However, according to this, the cutter blade 43 is fixed by a hexagonal bolt 46 screwed onto the cutter body 41 from the side.
The fixation of the hexagonal bolt 46 and the adjustment of its protrusion length were all done by tightening the hexagonal bolt 46. For this reason, an adjustment method such as temporarily fixing the cutter blade 43 with the protrusion length set to an appropriate length and then fixing it is only possible with a single hex bolt 46 as a tightening/fixing means. In conventional examples that do not have this, it is extremely difficult to finely adjust the protrusion length.

Further, the plurality of cutter blades 43 are connected to the cutter body 4.
The cutting length of each part of the coaxial cable cannot be set without using a gauge 44 having various gauge plates 45, and this gauge 44 increases the number of parts and costs. was inviting. When the cutter body 41 is made of metal material by die-casting or the like, distortions occur in various parts of the cutter body 41 during the formation of notches and screw holes that fit the coaxial cable, tapping screws, machining blade grooves, etc. However, it became necessary to take measures such as straightening the bend.

Furthermore, in the past, a spring 48 was disposed near the pivot 47 of the arm 42, and this spring 48
The coaxial cable is sandwiched by rotating the arm 42 toward the cutter body 41 while collapsing the spring 8 in the axial direction, but the spring 48, which has an axial restoring force, is held down by the arm 42 and installed. The drawback was that it was very time consuming and the assembly work was complicated.

In addition, when the coaxial cable is pinched, the arm 42 is locked by the engagement between the slidable locking piece 49 and the locking protrusion 50, but such a locking mechanism has problems such as being troublesome to operate. Ta.

The present invention was proposed to eliminate the above-mentioned drawbacks, and its purpose is to easily and reliably adjust and fix the protruding length of the cutter blade without using a gauge as in the past. To provide a coaxial cable cutter with a simple configuration, which allows setting of the cutting length, improved usability, and reduced cost by improving the opening/closing mechanism and locking mechanism of the arm.

(Means for Solving the Problems) In order to achieve the above object, the present invention forms a plurality of blade blocks each having a cutter blade whose protrusion length from a substantially semicircular notch can be adjusted. An arm with a removably attached blade block is rotatably pivoted to one end of the base, and together with the notch, the arm is adapted to the outer diameter of the coaxial cable jacket, shield braid, and core wire sheath, respectively. A substantially semicircular notch is formed in the base, the arm is opened by the restoring force of a coil spring bent at a substantially right angle, and the arm is rotated to be closed against the coil spring. The gist of this is that it is constructed so that it can be locked by being latched onto a possible hook.

(Function) The function is to hold each part of the coaxial cable to be cut in the notch of the blade block and the base, and to cut each part by a cutter blade that protrudes a predetermined length from the notch of the blade block. In the present invention, the cutting length can be selected by making the blade block detachable, and the protruding length of the cutter blade can be easily changed to obtain the desired cutting depth. It is composed of

Further, the arm is opened and closed via a coil spring bent at a substantially right angle, and this arm is locked by a hook or the like that can be locked or released with a single touch.

(Example) An example of the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 show the overall structure of a coaxial cable cutter according to the present invention. In these figures, reference numeral 1 denotes a substantially rectangular bar-shaped base, and the top surface of this base 1 has a notch 2 with a semicircular cross section that matches the outer diameter of the coaxial cable jacket, shield braid, core wire coating, etc. Multiple formations. Furthermore, a contact plate 3 is screwed to one side of the base 1, with which the end surface of the coaxial cable comes into contact. Further, the base 1 is installed in a lower cover 4 having a substantially U-shaped cross section, and a nut-shaped peeling part 5 is provided near the end of the lower cover 4 for peeling off the shield braid of the coaxial cable. has been done. This peeling part 5 has a through hole 6 formed in its center, and the shield braid is removed by pushing the core wire sheathing of the coaxial cable cut to a predetermined length into the through hole 6. It can be pushed out and peeled off.

Next, a connecting portion 7 is provided inside the end of the lower cover 4, and an arm 9 is rotatably attached to the connecting portion 7 via a pivot 8. This arm 9
1, a plurality of blade blocks 11 to 15 are removably attached to an upper cover 10 with a substantially U-shaped cross section using screws, and each blade block 11 to 15 has a second blade block.
Cutter blades 1 of various shapes as shown in Fig. 3.
7 are arranged.

The fixing structure of these cutter blades 17 will be explained in detail based on FIGS. 4 and 5. First, the blade block 11 shown in FIG. A cutter blade 17 is disposed in a slit 19 formed at the bottom of a semicircular notch 18 of the blade block 11 and extends along the length of the notch 18. This cutter blade 17 has a protrusion length into the notch 18 that is smaller than the blade block 1.
The blade block 1 can be adjusted by an adjustment screw 20 screwed into the bottom of the blade block 1.
It is fixed by a fixing screw 21 screwed in from the side of 1.

Then, as shown in Fig. 5, other blade blocks,
For example, in the blade block 12, the blade block 1
The cutter blade 17 disposed inside the notch 2 is connected to the notch 2 by an adjustment screw 20 from the bottom of the blade block 12.
The protrusion length from the blade block 12 is adjusted, and the length of the protrusion from the blade block 12 is adjusted.
It is fixed by a fixing screw 21 from the side.

In addition, in FIG. 2, a peeling part 23 for peeling off the shield braid is also attached to the rear end of the connecting part 7, and above this peeling part 23 there is a string or the like for hanging the present invention. A rotatable hanging portion 24 is attached to which the holder is attached.

Furthermore, as shown in FIGS. 2 and 6, an L-shaped groove 25 is formed in the upper end of the connecting portion 7 when viewed from the side, and a coil spring 26 is bent at a right angle and accommodated in this groove 25. has been done. This coil spring 26 has a restoring force in the direction of always separating the arm 9 from the base 1 side, and this restoring force is applied to the upper cover 10 through the upper end of the coil spring 26 as shown in FIG. It is something that is transmitted to the inner world.

On the other hand, as shown in FIGS. 1 and 2, a locking mechanism consisting of a lever 27, a hook 28, etc. is formed at the end of the base 1 opposite to the connecting portion 7. Specifically, as shown in FIG. 7, this locking mechanism has a lever 27 attached to a rotatable hook 28 which is pivotally supported at the end of the base 1 by a shaft 29, and the lower end of this hook 28 is It is constantly biased by a spring 30, and a locking notch 31 formed on the inner surface of the upper end of the hook 28 locks with a locking pin 32 on the blade block 11 side.

That is, when the arm 9 is open, the restoring force of the spring 30 causes the hook 28 and the lever 27 to be in the position shown by the solid line in FIG.
By pressing the tapered part 28a at the upper end, it rotates against the spring 30 as shown by the imaginary line in FIG. 7, and when the locking notch 31 and the locking pin 32 match, the spring 30 The restoring force engages the two, and the arm 9 is locked to the base 1 side.

To use this, the protruding length of the cutter blade 17 is adjusted using the adjustment screw 20 according to the cut portion of the coaxial cable jacket, shield braid, core wire coating, etc., and fixed using the fixing screw 21. A plurality of blade blocks 11 to 15 are attached to an upper cover 10.
At this time, as is clear from FIG. 3, by varying the position of the cutter blades 17 of each blade block 12 to 15 in the length direction of the notch 22, a cutting length corresponding to each cut portion can be obtained. First, the cutter blade 1 attached to the innermost blade block 15
7, the end of the coaxial cable sandwiched between the arm 9 and the base 1 is completely cut off.

Next, using the cutter blade 17 of the blade block 11, pull out the coaxial cable sandwiched between the blade block 11 and the base 1, make a longitudinal cut in the outer sheath, and then use the cutter blade 17 of the other blade. Block 1
The outer cover, shield braid, and core wire coating are cut using 2 to 14 cutter blades 17. In this case, the coaxial cable is housed in the predetermined notch 2, and the arm 9 is closed with its end surface in contact with the contact plate 3, and the arm 9 is locked by the locking mechanism described above and rotated once. For example, it is possible to cut only the jacket over its entire circumference. Also,
To release the arm 9 after cutting, push down the lever 27 as shown by the imaginary line in FIG.
are expanded and disengaged from the locking pin 32.

In this way, by sequentially cutting each component of the coaxial cable using the predetermined cutter blade 17, a coaxial casing having a desired terminal configuration can be obtained. In addition, in order to identify each cutter blade 17, the blade blocks 11 to 1 are
It is desirable to attach a code such as "1, . . . , 6" to the side surface of 5.

In this embodiment, as shown in FIG. 1, a plurality of through holes 33 are formed in the upper cover 10, and these through holes 33 are communicated with the heads of the adjustment screws 20 of the blade blocks 11 to 15. , blade block 11-1
Of course, it is also possible to adjust the protruding length of the cutter blade 17 by inserting a screwdriver or the like into the through hole 33 after attaching the cutter blade 5 to the upper cover 10. Furthermore, by providing the cutter blade 17 on the arm 9 side, the coaxial cable can be reliably positioned using the notch 2 on the base 1 side. Furthermore, if the lower cover 4 and the upper cover 10 are formed wide, the sense of stability during use can be greatly improved.

(Effects of the invention) As described above, according to the invention, the protrusion length of the cutter blade in each blade block can be easily finely adjusted, and the work of fixing the cutter blade after adjustment can be carried out quickly. effective. Also,
Each cutting length of the coaxial cable is preset by the position of the cutter blade on the blade block, so you can change the cutting length arbitrarily by replacing the blade block without having to prepare a separate cutting length gauge like in the past. It is possible to reduce costs and improve workability by reducing the number of parts.

In addition, since the blade block is divided into multiple parts, even if there is a slight distortion in each blade block when forming notches or screw holes, or when performing tasks such as tapping, the whole blade remains in one piece. Because they are not formed, these strains are absorbed between each blade block and are not transmitted to the entire blade. At the same time, the blade block 15 (see Figures 1 to 3) for cutting the entire coaxial cable typically has a
Cutting debris tends to accumulate after 3000 cuts, but in the present invention, the blade block 15 can be attached and detached to quickly remove the cutting debris.

Furthermore, the coil spring that opens the arm does not utilize its restoring force in the axial direction, but rather uses the restoring force when the coil spring is bent at a nearly right angle. There is no need for complicated efforts such as shrinking and holding down, and the assembly can be easily performed. Further, it has various effects such as being extremely convenient since the arm can be locked and unlocked with a single touch.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the present invention, in which Figure 1 is a perspective view, Figure 2 is a side view, and Figure 3 is a side view.
The figure is an exploded perspective view of the main parts, Figures 4A and 5A are side views of the blade block, Figures 4B and 5B are explanatory diagrams of the cutter blade in the fixed state, and Figures 6A and 5B are explanatory views of the cutter blade in the fixed state. 7 is an explanatory diagram of the lock mechanism, and FIG. 8 is a perspective view of a conventional example. 1... Base, 2, 18, 22... Notch, 8...
Axis, 9... Arm, 11, 12, 13, 14,
15...Blade block, 17...Cutter blade, 20
... Adjustment screw, 21 ... Fixing screw, 26 ... Coil spring, 28 ... Hook, 32 ... Locking pin.

Claims (1)

[Scope of utility model registration request] A plurality of blade blocks are formed, each with a cutter blade whose protrusion length from a roughly semicircular notch can be adjusted, and an arm on which these blade blocks are removably attached can be rotated at one end of the base. The outer sheath of the coaxial cable is pivoted to the notch, and
Approximately semicircular notches are formed in the base to fit the outer diameters of the shield braid and the core wire coating, respectively, and the arms are opened by the restoring force of a coil spring bent at an approximately right angle, and the coil A coaxial cable cutter, characterized in that the arm, which is closed against a spring, is locked by being engaged with a rotatable hook.