JP2013111018A - Cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool having high workability and safety in attaching/detaching of a chip receiver slidably attached and detached.SOLUTION: The cutting tool is structured as follows: a protection wall 36 projecting downward from the bottom surface of a placing portion 31, is formed on the bottom surface of the placing portion 31 of a chip receiver 3 between a rising wall portion 32 side of an attaching side wall 33 and the rising wall portion 32; and a plurality of slip-preventive portions 37 having projecting parts projecting toward the top surface side of the chip receiver and recessed parts recessed toward the top surface side of the chip receiver at the bottom surface side (back surface side) at positions corresponding to the projecting parts, are longitudinally formed at the longitudinal center part of the rising wall portion 32 of the chip receiver 3 at prescribed intervals.

Description

  The present invention relates to a reaper provided with a detachable chip receiver.

  Conventionally, the present applicant has already proposed one of the following patent documents as this type of reaper. That is, the chip receiver is slid and mounted on the blade support portion, and has an advantage that the attaching / detaching operation is extremely easy as compared with the conventional mounting structure using screws.

JP 2010-110242 A

  In the above-described conventional configuration, the operator grips the chip receiver to perform attachment / detachment work, but when the chip receiver is slidably attached to / detached from the blade support portion, the hand holding the chip receiver contacts the blade edge of the blade. There was a risk of injury. In addition, frictional resistance (sliding resistance) is generated between the engagement protrusion of the chip receiver and the engagement groove of the blade holder, etc., so the hand holding the chip receiver slips when the slide is attached and detached, and the blade edge of the blade There was also a risk of contact and injury. For this reason, the operator has to grip firmly so that the gripped hand does not slip, and the workability is not good.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a reaper with improved safety and workability when a chip receiver is attached and detached.

  A reaper according to the present invention includes a cutter that extends in the front-rear direction, a cutter support that supports the cutter, and a chip receiver that is slidably attached to the cutter support from the front toward the rear. The chip receiver includes a gripping portion that is gripped by an operator when the slide is mounted, and includes a protective wall between the gripping portion and the blade.

  In the reaper according to the present invention, the grip portion may include an anti-slip portion for preventing the gripped hand from slipping.

  A reaper according to the present invention includes a cutter that extends in the front-rear direction, a cutter support that supports the cutter, and a chip receiver that is slidably attached to the cutter support from the front toward the rear. The chip receiver includes a gripping part that an operator grips when mounting the slide, and the gripping part includes a non-slip part for preventing the gripped hand from slipping. .

  ADVANTAGE OF THE INVENTION According to this invention, the safety | security at the time of slide attachment / detachment of a chip receiver improves, and the new reaper with the workability | operativity of slide attachment / detachment can be provided.

It is a top view of the reaper which concerns on this embodiment. It is a figure which shows the cross section AA in FIG. It is a figure which shows the cross section BB in FIG.

  Hereinafter, a preferred embodiment for carrying out the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a plan view of a reaper according to the present embodiment. FIG. 2 is a view showing a cross section AA in FIG. FIG. 3 is a view showing a cross section BB in FIG. The following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention.

  As shown in FIG. 1, the reaper in this embodiment is also called a hedge trimmer, and is driven by a motor (not shown) built in the main body 1 and reciprocates back and forth, and the cutter. 2 and a chip receiver 3 that temporarily collects the branches and leaves cut off by 2.

  The blade 2 extends forward from the main body 1 and is composed of a pair of blade bodies 2a and 2b that are vertically opposed to each other as shown in FIG. Each blade body 2a, 2b has a plate shape extending in the front-rear direction, and triangular or trapezoidal blade portions protruding laterally are formed on both sides thereof at regular intervals in the front-rear direction. And a pair of upper and lower blade bodies 2a, 2b can reap the branches and leaves by reciprocating back and forth alternately. In the present embodiment, the two upper and lower blade bodies 2a and 2b reciprocate together, but one may be a fixed blade and the other a movable blade. In FIG. 1, reference numeral 5 denotes a main handle provided integrally with the main body 1, and reference numeral 6 denotes an auxiliary handle provided on the main body 1 so as to be pivotable back and forth. Further, a guard plate 4 is attached to the front portion of the main body 1 for preventing branches and leaves cut by the blade 2 from moving toward the rear operator.

  The blade 2 is supported by the blade support portion so as to be able to reciprocate back and forth. The blade support portion supports the blade 2 so as to be sandwiched from above and below as shown in FIG. Specifically, the blade support portion also extends in the front-rear direction in the same manner as the blade 2, and the rear end portion is attached and fixed to the main body 1. From the upper component member and the lower component member, the blade 2 is sandwiched vertically. Mainly composed. A plate-like lower support plate 10 is provided as a lower component located below the blade 2, and the upper component located above the blade 2 is composed of three members. The upper support plate 11, the upper support plate 11, and the upper support plate 11, which are stacked above the upper support plate 11 and open upward, have a substantially U-shaped support beam 12 and a cover body 13 that covers the upper opening of the support beam 12.

  A cylindrical spacer 14 is arranged between the upper support plate 11 and the lower support plate 10 as shown in FIG. 2, and the vertical distance between the upper support plate 11 and the lower support plate 10 by the spacer 14. Is set. On the other hand, a plurality of long holes 15 that are long in the front-rear direction are formed in the blade 2. By positioning the spacer 14 in the long hole 15, the cutter 2 can reciprocate in the front-rear direction. Bolts 16 are inserted from the lower side so as to penetrate the spacer 14 in the vertical direction, and the lower support plate 10 and the upper support plate 11 are formed by screwing the nuts 17 to the bolts 16 from the upper side of the support beam 12. The support beam 12 is connected and fixed up and down via a spacer 14.

  The support beam 12 is made of an aluminum extruded material formed so that the front-rear direction is the extrusion direction, and includes a bottom plate portion 20 that overlaps the upper support plate 11 and a pair of left and right sidewalls that rise upward from both side edges of the bottom plate portion 20. Part 21. Concave grooves 22 are formed on the outer sides of the side wall portions 21 of the support beam 12 along the front-rear direction. The concave groove 22 is for slidingly attaching the chip receiver 3 to the blade support portion along the front-rear direction, and is formed from the front end portion to the rear end portion of the support beam 12. In addition, a concave groove 23 is formed in the upper part of the inner surface of each side wall portion 21 along the front-rear direction, and the flange portion 13 a of the cover body 13 is engaged with the concave groove 23.

  The cover body 13 has a U-shape in a cross-sectional view that opens downward, and flange portions 13 a project from the lower ends of both side portions toward the sides, and the flange portions 13 a slide in the grooves 23. Thus, the cover body 13 can be mounted while sliding backward from the front end portion of the support beam 12, and conversely, the cover body 13 can be removed from the support beam 12 by sliding forward. When the cover body 13 is removed from the support beam 12, the upper opening of the support beam 12 is opened and the upper surface of the bottom plate portion 20 is exposed, and the nut 17 can be accessed in this state.

  The chip receiver 3 is slidably mounted on the blade support portion having such a configuration. The chip receiver 3 is formed by molding or the like from synthetic resin, for example, and the upper surface of the chip receiver 3 is a horizontal flat surface. A standing wall portion 32 that catches the branches and leaves, and an attachment portion that is formed on the other side of the lower surface of the placement portion 31 and is attached to the blade support portion. The mounting portion 31 has a length that covers substantially the entire length of the blade 2, and the standing wall portion 32 is formed so as to surround the mounting portion 31 from three sides by going around the front end portion and the rear end portion of the mounting portion 31, respectively. Has been.

  The mounting portion of the chip receiver 3 includes a pair of left and right mounting side walls 33 that protrude downward from the lower surface of the mounting portion 31. The attachment side wall 33 is formed over substantially the entire length of the chip receiver 3, and is formed so as to be positioned outside the side wall portion 21 of the support beam 12 as shown in FIG. An engagement protrusion 34 is provided on the inner surface of the lower end portion of the attachment side wall 33 so as to engage with the concave groove 22 formed outside the side wall portion 21 of the support beam 12. The engagement protrusion 34 has a shape having a predetermined length in the front-rear direction, and a plurality of the engagement protrusions 34 are formed at intervals in the front-rear direction, that is, the slide direction. In the present embodiment, the pair of engaging protrusions 34 are formed at a total of four locations. Note that the chip receiver 3 has a front-rear symmetrical shape with the center in the front-rear direction as the center, and can be slidably mounted from either front or rear although the orientation of the standing wall 32 with respect to the blade 2 is opposite to the left and right. ing.

  Further, in FIG. 2, a protective wall 36 is provided on the lower surface of the mounting portion 31 so as to project downward from the lower surface of the mounting portion 31 between the mounting side wall 33 on the side of the standing wall portion 32 and the standing wall portion 32. Is formed. The protective wall 36 is located closer to the standing wall portion 32 than the tip of the blade portion of the cutter 2 on the side located on the lower surface side of the placement portion 31. In the present embodiment, the protective wall 36 is formed over substantially the entire length of the mounting portion 31 in the front-rear direction, and also has a function as a reinforcement of the chip receiver 3.

  Further, as shown in FIG. 3, at the center portion in the front-rear direction of the standing wall portion 32 of the chip receiver 3, a convex portion protruding toward the upper surface side of the standing wall portion 32 and a lower surface at a position corresponding to the convex portion. A plurality of anti-slip portions 37 having recesses recessed toward the upper surface side on the side (rear surface side) are formed at predetermined intervals in the front-rear direction. The anti-slip portion 37 is formed from the upper end portion of the standing wall portion 32 toward the lower end portion along the inclination direction. The region where the non-slip portion 37 is formed serves as a gripping portion that an operator grips when the chip receiver 3 is slidably mounted on the blade support portion. In the present embodiment, six anti-slip portions 37 are formed.

  As shown in FIG. 2, a sliding projection 35 is provided on the inner side of the mounting side wall 33 so as to protrude downward with a predetermined distance from the mounting side wall 33. The sliding projection 35 is formed to be slidable with the upper surface of the side wall 21 of the support beam 12, does not contact the cover body 13, and a predetermined gap is formed between the sliding protrusion 35 and the cover body 13. The sliding projections 35 are symmetrically arranged inside the mounting side walls 33, and are formed at a plurality of positions so as to form a row with a space in the front-rear direction. In the present embodiment, a total of 12 sliding protrusions 35 are formed in one row, and a total of 12 sliding protrusions 35 are formed in the left and right rows.

  In order to slide-attach the chip receiver 3 to the blade support portion on the reaper configured as described above, the chip receiver 3 is slid backward from the front end portion of the support beam 12. At that time, the operator grasps the standing wall portion 32 of the chip receiver 3 and engages the groove 22 with the position of the engagement protrusion 34 of the chip receiver 3 at the front end portion of the support beam 12 and In this case, the operator's hand holding the standing wall portion 32 turns from the standing wall portion 32 to the lower surface of the placement portion 31. For this reason, an operator's hand will approach the blade part of the blade 2 located in the lower surface of the mounting part 31, and the operator's hand and the blade part of the blade 2 will contact, and there is a risk of injury. There is. In the present embodiment, since the protective wall 36 that prevents the operator's hand and the blade 2 of the cutter 2 from approaching each other is formed on the lower surface of the mounting portion 31, the operator's hand and the blade of the cutter 2 are provided with the protective wall 36. The risk of contact and injury can be reduced.

  Further, at the time of slide mounting, frictional resistance (sliding resistance) is generated between the concave groove 22 of the support beam 12 and the engaging protrusion 34 of the chip receiver 3. Further, frictional resistance (sliding resistance) is also generated between the upper surface of the side wall portion 21 of the support beam 12 and the sliding protrusion 35 of the chip receiver 3. Since the operator needs to slide the chip receiver 3 on the support beam 12 against these resistances, it is necessary to firmly hold the standing wall 32. In the present embodiment, an anti-slip portion 37 is formed on the standing wall portion 32 gripped by the operator, and both the convex portion on the upper surface side and the concave portion on the lower surface side of the anti-slip portion 37 have an anti-slip function. Therefore, the gripped hand is difficult to slip. Therefore, when the hand slips, the risk of injury due to contact between the blade part of the blade 2 and the hand can be reduced. In addition, since the gripped hand is hard to slip and the slide mounting operation can be performed with a weak gripping force, the workability is good.

  If the gripping force for gripping the standing wall portion 32 of the chip receiver 3 of the operator is insufficient or if the standing wall portion 32 is wet and slippery, the anti-slip portion 37 is formed. Although the gripped hand may slip, even if the hand slips, the protective wall 36 can prevent the hand from coming into contact with the cutting edge of the blade part 2, so that the chip receiver 3 can be safely attached and detached. it can.

  The preferred embodiments of the present invention have been described above, but the technical scope of the present invention is not limited to the technical scope of the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. It is possible.

DESCRIPTION OF SYMBOLS 1 Main body, 2 Blade, 2a Blade body, 2b Blade body, 3 Chip receiver, 4 Guard plate, 5 Main handle, 6 Auxiliary handle, 10 Lower support plate, 11 Upper support plate, 12 Support beam, 13 Cover body, 13a Flange part, 14 spacer, 15 long hole, 16 bolt, 17 nut, 20 bottom plate part, 21 side wall part, 22 concave groove, 23 concave groove, 31 mounting part, 32 standing wall part, 33 mounting side wall, 34 engagement Projection, 35 Sliding projection, 36 Protective wall, 37 Non-slip part

Claims (3)

A reaper comprising: a blade extending in the front-rear direction; a blade support portion that supports the blade; and a chip receiver that is slidably mounted on the blade support portion from the front to the rear in a detachable manner.
The chip receiver includes a gripping unit that an operator grips when the slide is mounted, and a protective wall between the gripping unit and the blade.   The reaper according to claim 1, wherein the grip portion includes a slip prevention portion for preventing the gripped hand from slipping. A reaper comprising: a blade extending in the front-rear direction; a blade support portion that supports the blade; and a chip receiver that is slidably mounted on the blade support portion from the front to the rear in a detachable manner.
The chip receiver includes a gripping part that is gripped by an operator when the slide is mounted,
The said grip part is provided with the anti-slip | slipping part for preventing the grip of the gripped hand, The reaper characterized by the above-mentioned.

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