JP5080423B2 - Reaper - Google Patents

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 attached to the blade holder, and has an advantage that the attaching / detaching operation becomes extremely easy as compared with the conventional attachment structure using screws.
Japanese Patent No. 3121580 JP 2006-14661 A

  However, if the frictional force between the chip receiver and the tool holder decreases with time, if the force in the front-rear direction is excessively applied to the chip receiver during use, the position may be shifted back and forth and disengaged forward. There is sex.

  On the other hand, a configuration in which the chip receiver is fixed with a screw on the rear end side as described in Patent Document 2 has been proposed, but the screw tightening operation is also troublesome.

  Therefore, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a reaper capable of easily attaching and detaching a chip receiver and preventing the chip receiver from dropping forward.

  The present invention has been made to solve the above problems, and a reaper according to the present invention includes a blade extending in the front-rear direction, a blade support portion supporting the blade, and a blade support portion from the front to the rear. A reaper including a tip receiver that is slidably mounted detachably toward the cutter, and provided with a stopper that is slidably mounted on the blade support portion to prevent the tip receiver from falling forward from the blade support portion, An elastic locking part for locking and unlocking the stopper to the blade support part by its elasticity is provided.

  In the reaper having such a configuration, the tip receiver is prevented from falling forward from the blade support portion during use by slidingly attaching the stopper to the blade support portion. Further, since the elastic locking portion for locking and unlocking the stopper to the blade support portion by the elasticity is provided, the elastic locking portion is elastically deformed when the stopper is slid to the blade support portion. Accordingly, the stopper is locked by the elastic locking portion. Conversely, when the stopper is removed from the blade support portion, the locking state is released by elastic deformation of the elastic locking portion.

  In particular, it is preferable that the chip receiver and the stopper are respectively formed with coupling engaging portions that engage with each other in a direction perpendicular to the front-rear direction.

  When the coupling engaging portions of the chip receiver and the stopper engage with each other, the position of the chip receiver is reliably fixed, and displacement in the front-rear direction is prevented.

  Further, the blade support portion includes a support member made of an aluminum extrusion material extending in the front-rear direction, and the chip receiver is slid and mounted on a slide mounting engagement portion formed along the extrusion direction on the support member. The stopper is preferably configured to be inserted into the front end opening of the support member to serve as an end cap of the support member.

  By using an aluminum extruded material as the support member, a large strength can be obtained, and the blade can be prevented from being bent and the cutting operation can be performed smoothly. Moreover, since it is an aluminum extrusion material, the slide mounting engagement portion can be easily formed in the extrusion direction. And since the stopper is inserted into the front end opening of the support member and becomes an end cap, the front end surface of the support member made of an aluminum extrusion material is hidden by the stopper, and the appearance appearance is good, and the cut leaves are supported Entering the front end opening of the member is also prevented, and the operation of removing branches and leaves from the front end opening of the support member becomes unnecessary.

  As described above, the tip receiver can be prevented from falling off by the stopper, and the stopper can be easily slid by the elastic locking portion.

  Hereinafter, a reaper according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a reaper according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a partial perspective view of the reaper. 4 is an enlarged perspective view of the main part of the reaper, FIG. 5 is an enlarged perspective view of the main part of the chip receiver 30 of the reaper, and FIG. 6 is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 1, the reaper in the present embodiment is also called a hedge trimmer, and includes a blade 2 that is driven by a motor (not shown) built in the main body 1 and reciprocates back and forth. . The blade 2 is composed of a pair of upper and lower blade bodies 3 and 4, each blade body 3 and 4 is a plate shape extending in the front-rear direction, and a triangular shape or a stand protruding laterally on both sides thereof. Shaped blade portions are formed at regular intervals in the front-rear direction. However, the interval (pitch) between the blade portions may be changed. For example, the interval between the front blade portions of the blade bodies 3 and 4 may be larger than the interval between the rear blade portions. The pair of upper and lower blade bodies 3 and 4 alternately reciprocate back and forth, so that the branches and leaves can be cut off. In this embodiment, the two upper and lower blade bodies 3 and 4 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.

  The blade 2 is supported by the blade support portion 7 so as to be able to reciprocate back and forth. The blade support portion 7 supports the blade 2 so as to be sandwiched from above and below as shown in FIG. Specifically, the blade support portion 7 also extends in the front-rear direction similarly to the blade 2, and its rear end portion is attached and fixed to the main body 1. In the present embodiment, the blade support portion 7 includes three support members. In other words, the blade support portion 7 includes a first support member 8 positioned below the blade 2 and second and third support members 9 and 10 positioned above the blade 2. The first support member 8 and the second support member 9 are both metal strip-like plates that face each other vertically, and a cylindrical spacer 11 is spaced in the front-rear direction between them. A plurality of them are arranged, and the vertical distance between the first and second support members 8 and 9 is set by the spacer 11. On the other hand, a plurality of long holes 12 that are long in the front-rear direction are formed in the cutter 2 corresponding to the spacers 11, and the cutter 2 can reciprocate back and forth by positioning the spacers 11 in the long holes 12. Yes. Since the blade 2 moves back and forth between the first and second support members 8 and 9, both the first and second support members 8 and 9 have durability against sliding of the blade 2. Excellent material is used. The second support member 9 is thinner than the first support member 8.

  Further, at the front end portion of the second support member 9, as shown in FIGS. 4 and 6, a rectangular plate that is long in the front-rear direction and has a central portion separated from both side portions via two cut lines. A spring portion 13 (elastic locking portion) is formed. The leaf spring portion 13 is a front inclined surface portion 13a that gradually moves upward from the front end (front end) to the middle, and thereafter, a rear inclined surface portion 13b that gradually moves downward through a bent portion. The front side inclined surface portion 13a and the rear side inclined surface portion 13b are formed in a generally U shape. The function of the leaf spring portion 13 will be further described later.

  And the 3rd support member 10 is arrange | positioned so that it may overlap with the upper side of the 2nd support member 9. As shown in FIG. The third support member 10 also extends in the front-rear direction in the same manner as the second support member 9. Unlike the second support member 9, the third support member 10 is made of an aluminum extruded material. The third support member 10 is formed in a hollow rectangular tube shape in which the pushing direction is the front-rear direction. On the lower surface of the third support member 10, a notch portion 20 is formed in the center in the width direction so as to continue from the front end portion to the rear end portion along the longitudinal direction, that is, the front-rear direction, and opens downward. As shown in FIG. 4, the leaf spring portion 13 of the second support member 9 enters the cutout portion 20 from below. A head 21 a of a bolt 21 is inserted inside the third support member 10, and the bolt 21 protrudes downward through a notch 20 on the lower surface and penetrates the spacer 11 and the first support member 8. A nut 22 is screwed below the first support member 8. With this bolt 21 and nut 22, the blade 2 is attached to the blade support portion 7, and the first to third support members 8, 9, 10 are integrated vertically. The cross-sectional shape of the hollow portion inside the third support member 10 is a shape corresponding to the head portion 21 a of the bolt 21.

  Further, as shown in FIGS. 2 and 4, engagement grooves 23 as slide mounting engagement portions for sliding mounting the chip receiver 30 along the front-rear direction are formed on the left and right side surfaces of the third support member 10. Is formed. The engaging groove 23 is also formed from the front end portion to the rear end portion along the front-rear direction, and is formed at symmetrical positions on the left and right side surfaces. That is, the third support member 10 in the present embodiment has a bilaterally symmetric shape and can be attached to the main body 1 regardless of the front and rear.

  The chip receiver 30 is slide-mounted from the front end portion of the third support member 10 toward the rear. The chip receiver 30 is formed from, for example, synthetic resin by molding or the like, and has a predetermined flexibility. As shown in FIGS. 1 to 3, the chip receiver 30 has a top surface that is a substantially horizontal flat surface on which the branches and leaves are placed, and the chip receiver 30 faces outward from one side of the placement portion 31. It has a standing wall portion 32 that rises obliquely upward and receives branches and leaves, and an attachment portion that is formed on the other side portion of the lower surface of the placement portion 31 and is attached to the third support member 10. The mounting portion 31 has a length that covers substantially the entire length of the blade 2, and the standing wall portion 32 extends so as to wrap around the front end portion and the rear end portion of the mounting portion 31, and surrounds the three sides of the mounting portion 31. It is out. A ceiling part may be further extended from the standing wall part 32 to prevent the branches and leaves from scattering upward.

  The mounting portion of the chip receiver 30 includes a pair of left and right ridges 34 that protrude downward from the lower surface of the mounting portion 31. The distance between the two ridges 34 corresponds to the dimension between the upper parts on both sides of the third support member 10, and the chip receiver 30 is arranged such that the both ridges 34 sandwich the upper parts on both sides of the third support member 10 from the left and right. Is attached to the third support member 10. As shown in FIG. 5, engagement protrusions 35 that protrude inward are formed on the inner surfaces of both ridges 34 of the chip receiver 30. The engagement protrusion 35 is a slide mounting engagement portion on the chip receiver 30 side that engages with the engagement groove 23 of the third support member 10, and the engagement protrusion 35 engages with the engagement groove 23. Thus, the chip receiver 30 is prevented from coming out of the third support member 10 upward. The engaging projections 35 are formed at a total of four locations, two on the front side and two on the rear side, for each of the left and right ridges 34, but the number and arrangement position are arbitrary and may be formed continuously. Whether it is discontinuous or the like is also arbitrary.

  Further, in FIG. 1, the chip receiver 30 is attached so as to be positioned on the right side of the blade 2, but the chip receiver 30 can also be attached by inverting the front and back, and in this case, the chip receiver 30 is disposed on the left side of the blade 2. Will be located. A positioning piece 36 is formed on the front end and the rear end of the mounting portion 31 so as to project forward and rearward in a semicircular or tongue-like shape in plan view, and each positioning piece 36 has an engagement hole penetrating vertically. 37 (engagement part for connection) is formed (refer FIG.1, FIG.3, FIG.5, FIG.6).

  In this way, the chip receiver 30 is slid from the front end portion of the third support member 10 toward the rear, and in order to prevent the chip receiver 30 from falling forward from the third support member 10. A stopper 40 is provided. As shown in FIG. 6, the stopper 40 is slidably mounted on the third support member 10 to prevent the chip receiver 30 from coming off. Specifically, the stopper 40 is formed by molding or the like from, for example, a synthetic resin, and as shown in FIGS. 3 and 6, the insertion portion 41 inserted into the front end opening 24 of the third support member 10, and the insertion portion. The head portion 42 is provided at one end of the head 41 and has a larger shape. As shown in FIG. 6, when the insertion portion 41 is inserted into the front end opening 24 of the third support member 10, the end surface 42 a on the insertion portion 41 side of the head portion 42 comes into contact with the front end surface 10 a of the third support member 10. Thus, the stopper 40 is prevented from further moving backward, and the insertion position of the stopper 40, that is, the position in the front-rear direction is determined. Further, the head portion 42 covers substantially the entire front end face 10 a of the third support member 10 from the front side in a state where the stopper 40 is inserted into the third support member 10. Therefore, the stopper 40 functions as an end cap of the third support member 10.

  Further, the leaf spring portion 13 of the second support member 9 described above is locked to the lower surface of the insertion portion 41 of the stopper 40 to prevent the stopper 40 from moving forward. That is, the lower surface of the insertion portion 41 of the stopper 40 is located on the head portion 42 side and is a substantially horizontal front plane portion 41a that is one step higher, and a substantially horizontal rear plane that is one step lower than the front plane portion 41a. It is comprised from the part 41c and the inclined surface part 41b which was located between the front side plane part 41a, and the rear side plane part 41c, and inclined downward as it went back. Further, the rear inclined surface portion 13b of the leaf spring portion 13 of the second support member 9 and the inclined surface portion 41b of the lower surface of the stopper 40 are substantially equal to each other, and in the state where the stopper 40 is mounted, both of them are in contact with each other. At the same time, the leaf spring 13 biases the insertion portion 41 upward. However, there may be a state in which there is a gap between the leaf spring portion 13 and the stopper 40 and the leaf spring portion 13 does not urge the stopper 40 upward. In any case, the rear inclined surface portion 13b of the leaf spring portion 13 of the second support member 9 engages the lower surface of the stopper 40, thereby preventing the stopper 40 from moving forward. However, the leaf spring portion 13 can be elastically deformed in the vertical direction by its own retained elasticity, that is, so as to open a U-shape. Accordingly, when the stopper 40 is pulled strongly forward by hand, the leaf spring portion 13 is elastically deformed downward, and the locked state of the stopper 40 by the rear inclined surface portion 13b of the leaf spring portion 13 is released. Similarly, when the stopper 40 is inserted into the third support member 10, the insertion portion 41 abuts against the front inclined surface portion 13a of the leaf spring portion 13, and the leaf spring portion 13 is elastically deformed downward, as shown in FIG. It becomes a locked state.

  The head portion 42 of the stopper 40 is formed with a columnar engagement pin 43 (coupling engagement portion) protruding upward. As shown in FIG. 6, the engaging pin 43 engages with the engaging hole 37 of the chip receiver 30 (uneven engagement), whereby the stopper 40 and the chip receiver 30 are connected to each other, and the chip receiver 30 is moved in the front-rear direction. Is positioned. Before the stopper 40 is attached to the third support member 10, the stopper 40 is connected to the chip receiver 30 in advance, and the chip receiver 30 and the stopper 40 are collectively attached to the third support member 10 by sliding. Alternatively, the stopper 40 is connected to the chip receiver 30 in a state where the chip receiver 30 is slid and attached to the third support member 10, for example, about half, and then the stopper 40 is third supported while the chip receiver 30 is further slid rearward. It is inserted into the front end opening 24 of the member 10. When the chip receiver 30 is flexible, the chip receiver 30 is first slid onto the third support member 10 and a predetermined portion on the front side of the chip receiver 30 is bent upward. 40 can be inserted into the front end opening 24 of the third support member 10 and the engaging pin 43 of the stopper 40 can be engaged with the engaging hole 37 of the chip receiver 30 to connect them. In this case, the bottom surface of the tip of the positioning piece 36 of the chip receiver 30 may be tapered so that the stopper 40 can be easily inserted.

  In the reaper configured as described above, the stopper 40 is slid onto the third support member 10 and the stopper 40 is locked by the leaf spring portion 13. The chip receiver 30 connected to the stopper 40 by the concave-convex engagement of the joint hole 37 does not fall forward during use. Further, since the chip receiver 30 is prevented from moving in the front-rear direction by the concave-convex engagement of the engaging pin 43 and the engaging hole 37, the positional displacement not only forward but also rearward is prevented and stable without rattling. A feeling of use is obtained. In addition, since the stopper 40 is released by the elastic deformation of the leaf spring portion 13, the stopper 40 can be easily attached and detached. Therefore, the attachment and removal work of the chip receiver 30 can be easily performed.

  Moreover, since it is the structure which uses a part of 2nd support member 9 as the leaf | plate spring part 13, a separate member is unnecessary as an elastic latching | locking part. Furthermore, since the leaf spring portion 13 engages the stopper 40 from the notch portion 20 on the lower surface of the third support member 10, no additional post-processing is required for the third support member 10.

  Furthermore, since the third support member 10 is an aluminum extrusion material, the blade support portion 7 has high rigidity. Therefore, the blade 2 can be prevented from being bent, particularly in the vertical direction, and a stable cutting operation can be performed. Moreover, since the engagement groove 23 as the slide mounting engagement portion is formed in the third support member 10 of the aluminum extruded material, the engagement groove 23 can be formed at the same time as the extrusion molding, and the formation process is easy. It can be manufactured inexpensively. Since the stopper 40 serves as an end cap and hides the front end face 10a of the third support member 10, the appearance appearance is improved and the cut leaves and the like are in the front end opening 24 of the third support member 10. It can also be prevented from entering. Therefore, the maintenance work after the mowing work of removing branches and leaves from the front end opening 24 of the third support member 10 is also unnecessary.

  In the present embodiment, the stopper 40 is formed so as to hide substantially the entire front end face 10a of the third support member 10, but only a part of the front end face 10a may be hidden.

  Further, although the engagement groove 23 as the slide mounting engagement portion is formed on the side surface of the third support member 10, the engagement groove 23 may be provided on the upper surface. Furthermore, although the engagement groove 23 is formed in the third support member 10 as the slide mounting engagement portion, an engagement protrusion may be formed conversely. Thus, the shape of the third support member 10 is also arbitrary.

  Further, the configuration is such that the stopper 40 is inserted into the third support member 10 so that the stopper 40 is inserted, but the configuration may be such that the slide support is applied to the outside instead of the inside.

  Furthermore, although the leaf spring portion 13 is provided on the second support member 9 as an elastic locking portion, it goes without saying that a separate elastic locking member may be provided. In addition, the elastic locking portion may be provided on the stopper 40 side. For example, the elastic locking portion may be provided on the upper surface, the lower surface, the side surface, or the like of the insertion portion 41.

  The configuration of the coupling engaging portion is also arbitrary, and the engaging pin 43 as a convex portion is provided on the stopper 40 side and the engaging hole 37 as a concave portion is provided on the chip receiver 30 side. A concave portion may be provided on the 40 side, and a convex portion may be provided on the chip receiver 30 side. Further, the recess may not be a through hole. Further, the concave and convex direction of the coupling engaging portion is not limited to the vertical direction, and may be the horizontal direction. In any case, the direction may be perpendicular to the front-rear direction.

  Further, the configuration in which the stopper 40 and the chip receiver 30 are coupled by the coupling engaging portion has been described. However, the stopper 40 may be formed integrally with the chip receiver 30 instead of being separated.

  Moreover, although the blade support portion 7 is composed of three support members, it may be composed of two upper and lower support members, or conversely four or more support members, and does not use an aluminum extrusion material. May be.

  Furthermore, although the configuration in which the chip receiver 30 is slide-mounted from the front end portion of the blade support portion 7 toward the rear has been described, it is configured to be slide-mounted from the middle portion in the front-rear direction of the blade support portion 7 toward the rear. There may be.

  The overall configuration of the reaper can be modified in various ways, and is not limited to an electric type using a motor as a driving device, but may be an engine type.

The top view which shows the reaper in one Embodiment of this invention. AA sectional drawing of FIG. It is a fragmentary perspective view of the reaper in the embodiment, Comprising: The state in the middle of attachment of a stopper is shown. The principal part expansion perspective view of the reaper in the embodiment. The principal part expansion perspective view of the chip receiver of the reaper in the embodiment. BB sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Blade 3 Blade body 4 Blade body 5 Main handle 6 Auxiliary handle 7 Blade support portion 8 First support member 9 Second support member 10 Third support member 10a Front end surface 11 Spacer 12 Long hole 13 Plate spring portion 13a Front inclined surface portion 13b Rear inclined surface portion 20 Notch portion 21 Bolt 21a Head portion 22 Nut 23 Engaging groove (engagement portion for slide mounting)
24 Front end opening 30 Chip receiver 31 Placement part 32 Standing wall part 34 Projection 35 Engagement protrusion (engagement part for slide mounting)
36 Positioning piece 37 Engagement hole (engagement part for connection)
40 Stopper 41 Insertion part 41a Front plane part 41b Inclined surface part 41c Rear plane part 42 Head part 42a End surface 43 Engagement pin (engagement part for connection)

Claims (3)

A reaping machine 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,
A stopper that is slidably mounted on the blade support portion is provided to prevent the chip receiver from falling forward from the blade support portion, and an elastic lock portion that locks and unlocks the stopper to the blade support portion by its elasticity. A reaper characterized by being provided.   The reaper according to claim 1, wherein the chip receiver and the stopper are respectively provided with coupling engaging portions that engage with each other in a direction perpendicular to the front-rear direction.   The blade support portion includes a support member made of an aluminum extruding material extending in the front-rear direction, and the tip receiver is slid and mounted on a slide mounting engagement portion formed along the extrusion direction on the support member. The reaper according to claim 1, wherein the reamer is configured to be inserted into a front end opening of the support member to become an end cap of the support member.

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