JPH073566U - Blade spare cutter knife holder - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the structure of the blade spare type cutter knife holder. [Structure] A spare retainer used for holding a spare blade also has a function of closing a grip rear end opening of a space for storing a spare blade formed in a grip of a holder. [Effect] The conventional cap used to close the space is no longer required.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 Cutter knives are generally installed in a guide sheath that encloses a synthetic resin grip around a blade holder consisting of a thin steel channel with a lip, and is slidably mounted so that the cutting edge of the knife blade appears and disappears. The slider connected to the knife blade inserts and removes the cutting edge for safe use, and the pocket or space for storing the blade spare is available for the cutter knife to allow immediate replacement when the knife blade is exhausted. May be provided on the holder. The blade spare type cutter knife is proposed, which can improve the utility of the cutter knife by properly storing the blade spare.

[0002]

[Prior art]

 When a blade spare storage pocket is provided in a cutter knife holder of this type, the blade spare must be held in a tag with a split pin-shaped protrusion that fits into its end hole and then inserted into the storage pocket to accommodate this tag. It is customary to lock a cap or end cap with a deep recess on the holder. However, such a cap is likely to be lost or lost during the use of the cutter knife, especially when replacing or removing the blade spare, and the holder with the cap thus lost becomes unbalanced and difficult to use. There was a risk that the blade spare would come out undesirably.

[0003]

[Problems to be solved by the device]

 The purpose of this invention is to propose a holder for a blade spare type cutter knife that eliminates the cap, which was previously indispensable as a partial element of the holder, and avoids the disadvantages caused by its loss or accident.

[0004]

According to the present invention, a knife blade, together with a slider to which the knife blade is detachably mounted, is provided with a cutting edge of the knife blade in a guide sheath made of a thin steel channel with a lip and surrounded by a synthetic resin grip. It is a cutter knife holder that is mounted so that it can slide, and has a space for storing a spare blade between the back of this guide case and the inside of the grip. A blade spare type cutter knife holder in which a spare retainer that tightly fits in the opening of the space and also functions as an end cover is locked to the grip, where the spare retainer is the locking provided on the grip at the spacer closed position. It has snap projections that fit into the holes, and the spare retainers have inserts formed on both inner side walls of the space. A pair of ribs that respectively fit in the groove, a holding recess that sandwiches the blade spare edge and blade back with these pairs of ribs, and a pin shape that rises from the bottom wall of this holding recess and fits into the end hole of the blade spare. The grip has a slit slit that divides the tongue piece and the bottom wall of the retaining recess that suppress the edge of the blade spacer into two parallel to the rib including the pin-shaped protrusion. It is more desirable in practice to provide a wedge-shaped ridge that engages and pushes it open to tighten the fit of the blade spare with the end hole of the blade spare.

1 (a), 1 (b) and 1 (c) show the upper surface, the front surface and the rear surface of the holder according to the present invention, and the rear surface in FIG. 1 (d). In the figure, reference numeral 1 is a synthetic resin grip that encloses a guide sheath consisting of a thin steel channel with a lip not shown in the figure, and 2 is a guide groove for the guide sheath, and 3 is a guide. Reference numerals 4 and 5 denote a top anti-slip groove of the grip 1 and a front and back anti-slip groove of the grip 1, and a string passage hole, respectively.

The grip 1 has a space 8 for storing about two blade spares (not shown) between the back surface of the guide sheath and the inner surface of the grip facing the guide sheath, and the space 8 taken along the line AA in FIG. 1B. As shown in FIGS. 2 (a) and 2 (b) showing the BB cross section of FIG. 2 (b), the guide groove is formed by scooping the bottom of the insertion groove 2 of the guide sheath, and the space 8 is further formed in FIG. 2 (a). As shown in the figure, the central parallel groove 9 and the wedge-shaped ridge 10 extending in parallel at the center are provided.

The grip 1 is tightly fitted in the opening 11 of the space 8 at the rear end thereof, and the spare retainer 12 which also functions as the end cover of the grip 1 is fitted in the locking hole 13 provided in the grip 1. Use the projection 14 to snap them together.

As shown in FIG. 3A, the spare retainer 14 includes a pair of ribs 16 that are respectively fitted with the insertion grooves 15 formed on both inner side walls of the space 8 (see FIGS. 2B and 2C), A holding recess 18 that sandwiches the blade tip 17a and the blade spine 17b of the blade spare 17 by the pair of ribs, and a pin-shaped projection 19 that protrudes from the bottom wall of the holding recess 18 and fits into the end hole 17c of the blade spare 17. It has a slit slit 21 that divides the raised tongue piece 20 that restrains the edge of the blade spare 17 and the bottom wall of the holding recess 18 into two parallel to the rib 16 including the pin-shaped projection 19.

The spare retainer 12 further has a shape in which the rear end opening of the space 8 of the grip 1 is closed and conforms to the outer contour of the rear end of the grip 1 so as not to cause a morphological discomfort. It has a knob 22 formed by a smoothly continuous curved surface, and this knob 22 allows the pin-shaped projection 14 to be lifted for detaching from the locking hole 13 by slightly bending it by putting a claw on it. To

On the back surface of the spare retainer 14 (see FIG. 3B), rib protrusions 23 and 24 for guiding sliding along the parallel groove 9 recessed from the space 8 are provided opposite to each other with the slit slit 21 interposed therebetween. Has been done.

For reference, FIGS. 4 (a), 4 (b) and 4 (c) show a conventional cutter knife of this type including a front face, an AA cross section and a rear face thereof, and FIG. Although the front view of the tab used for the spare storage is shown, the knife blade 17 is slidable at its tip 17d in a guide sheath 25, which is not shown in FIG. 1, and is made of a thin steel channel with a lip. It is housed and mounted together with a slider 27 having a connecting protrusion 26 that fits into the end hole 17c opened at the tail end. In this example provided on the slider 27, the tip 17d is projected and retracted by a push screw type fastener 28. The known technology, including the fact that both positions are fixed and convenient for carrying and carrying, is exactly the same for the holder of the present invention.

In FIG. 4, reference numeral 29 is a tab used as a jig for preliminarily storing the blade spare 17 in which two blades are stacked in this example in the space 8 ′ of the grip 1 ′. 29b, a pin-shaped projection 19 ', and a restraining tongue piece 20', but a cap 31 to be fitted on the rear end of the grip 1'to cover the knob 30 of the tab 29 is required as a separate part.

[0013]

[Action]

 Since the grip 1'of the conventional blade spare type cutter knife described with reference to FIG. 4 is used in combination with the cap 30, the cap 30 is often lost or lost when the spare blade 17 is replaced. The idea is to improve the structure by eliminating the use of such a cap and holding the spare blade more securely. The spare retainer 12 itself is tightly fitted into the space opening at the rear end of the grip 1 and the end lid is closed. Since it also has the function of, there is no problem when using a cap anymore.

That is, as shown by phantom lines in FIG. 3A, normally, two or three spare blades 17 are arranged so that the end holes 17 c at the tail end thereof fit into the pin-shaped projections 19 of the spare retainer 12. , The blade tip 17a and the blade back 17b are sandwiched between the ribs 16 and housed in the recess 18 of the spare retainer 12 and clipped by the restraining tongue 20, and then the spare retainer 12 is inserted into the space 8 at the rear end of the grip 1. The pin-shaped projections 14 are snapped into the locking holes 13 by pushing the ribs 16 into the insertion grooves 15 on both inner side walls from the openings, and the knobs 22 are aligned with the rear end contour of the grip 1. Close the space 8 opening.

At this time, the rib protrusions 23 and 24 on the back surface of the spare retainer 12 are slid along the parallel groove 9 recessed from the space 8 of the grip 1 while the slit slit 21 between the rib protrusions 23 and 24 is formed. It is expanded by the wedge-shaped ridge 10 provided on the groove bottom of the parallel groove 9 and expands the pin-shaped protrusion I in that direction to strengthen the engagement of the spare blade 17 with the end hole 19 and, at the same time, to the rib 16 The space is widened and the engagement of the rib 16 with the insertion groove 15 is also strengthened, so that the spare retainer 12 and the spare blade 17 are securely gripped in the space 8.

[0016]

【Example】

 The prototype according to what is illustrated in FIGS. 1 to 3 as a cutter knife holder using an oversized blade having a blade width of 100 mm and a blade width of 22 mm was suitable for the intended purpose.

[0017]

[Effect of device]

 Due to the inconvenience of the blade spare type cutter knife holder, which was conventionally associated with the cap on the grip, this invention allows the opening of the space at the rear end of the grip to be closed by the knob portion of the spare retainer. It was solved by

[Brief description of drawings]

FIG. 1 is a top view (a) showing a grip of a holder,
It is a front view (b), a rear view (c) and a rear view (d).

2A is a sectional view taken along the line AA of FIG. 1A, FIG. 2B is a sectional view taken along the line BB of FIG. 1B, and FIG.
Is.

FIG. 3 is a front view (a) and a rear view (b) of a spare retainer.

FIG. 4 is a front view (a), a sectional view (b), a rear view (c) and a front view (d) of a tab showing a conventional cutter knife.

[Explanation of symbols]

 1 Grip 8 Space 12 Spare Retainer 17 Knife Blade (Spare Blade) 25 Guide Sheath 27 Slider

Claims (3)

[Scope of utility model registration request] 1. A knife blade, together with a slider which can be attached to and detached from the knife blade, is mounted in a guide sheath made of a thin steel channel with a lip and surrounded by a synthetic resin grip so that the cutting edge of the knife blade can slide in and out. The cutter knife holder has a space for storing the spare blade between the back of the guide sheath and the inner surface of the grip. A blade spare type cutter knife holder in which a spare retainer that also functions as a lid is locked to the grip. 2. The holder according to claim 1, wherein the spare retainer has a snap projection that fits into a locking hole provided in the grip at the closed position of the space. 3. A pair of ribs, each of which has a spare retainer and which fits into an insertion groove formed on both inner side walls of the space.
A holding recess that sandwiches the blade tip and blade back of the blade spare with a pair of these ribs, and a pin-shaped protrusion that protrudes from the bottom wall of this holding recess and fits into the end hole of the blade spare, and a cut that suppresses the edge of the blade spare. There is a slit slit that bisects the raised tongue and the bottom wall of the holding recess in parallel with the rib including the pin-shaped protrusion, and the grip engages with the slit slit and pushes the slit to open it. 3. The holder according to claim 1, further comprising a wedge-shaped ridge for tightly fitting the blade spare to the end hole.