JP3127320U - Replaceable blade farming tool - Google Patents

Abstract

A replaceable blade type agricultural implement capable of always reliably replacing a replaceable blade.
In this device, a plurality of fitting protrusions 22 are formed, and a gap generated between a bolt 24 and a bolt insertion hole 28 is formed between each fitting protrusion 22 and the fitting hole 30. Therefore, even if an excessive impact force is applied to the spare blade 16 when the replaceable blade type agricultural implement 10 is used, this impact force is directly received by the fitting protrusion 22. In addition, an excessive impact force is not directly applied to the bolt 24. Therefore, the thread of the bolt 24 is not crushed, and the replacement work of the replaceable blade 16 can always be performed reliably.
[Selection] Figure 2

Description

  The present invention relates to an improvement of a replaceable blade type agricultural implement.

  An example of this type of replaceable blade type agricultural implement is disclosed in Japanese Utility Model Laid-Open No. 7-7312 (Patent Document 1). This conventional replaceable blade type agricultural implement includes a handle, a metal replaceable blade mounting member (shaft) fixed to the tip of the handle, and a metal replaceable blade that is detachably attached to the replaceable blade mountable member. I have.

  The replacement blade mounting member is formed with a bolt insertion hole and a fitting projection, and the replacement blade has a bolt insertion hole and a fitting hole for fitting and fixing the fitting projection. Is formed.

When assembling the conventional replaceable blade type agricultural implement, the replaceable blade is positioned with respect to the replaceable blade mounting member, and the fitting protrusion is fitted into the fitting hole. Then, the replaceable blade is fixed to the replaceable blade mounting member by inserting the bolt into the bolt insertion hole and screwing the sleeve nut onto the tip of the bolt protruding from the hole.
Japanese Utility Model Publication No. 7-7312

  In the prior art, since the replaceable blade and the replaceable blade mounting member are fixed by two-point support of the bolt and the fitting protrusion, an excessive impact is applied to the replaceable blade by swinging down the replaceable blade type farming tool. Then, this impact force is directly applied to the bolt, and the screw thread of the bolt may be crushed. And if the screw thread of a volt | bolt is crushed, when it is bad, the screwing operation of a volt | bolt cannot be performed but replacement | exchange of a replacement blade will become impossible.

  The present invention has been made in view of such conventional problems, and it is an object of the present invention to provide a replaceable blade type agricultural tool capable of always reliably replacing a replaceable blade.

  The invention described in claim 1 is described as follows: “The handle 12, the metal replacement blade mounting member 14 fixed to the tip of the handle 12, and the metal replacement blade 16 removably attached to the replacement blade mounting member 14. The replacement blade mounting surface 18a of the replacement blade mounting member 14 is provided with a fitting projection 22 and a screw hole 26. The replacement blade 16 is fitted with the fitting projection 22 for fitting and fixing. The joint hole 30 and the bolt insertion hole 28 are provided at positions corresponding to the fitting protrusion 22 and the screw hole 26, respectively, and the tip of the bolt 24 inserted into the bolt insertion hole 28 is connected to the screw hole 26. A replaceable blade type agricultural tool 10 in which the replaceable blade 16 and the replaceable blade mounting member 14 are fixed by screwing, and a plurality of fitting protrusions 22 are formed, and a bolt 24 and a bolt insertion hole are formed. The gap generated between the fitting projection 22 and the fitting hole 30 Greater than the gap that occurs between "it is blade-type agricultural implement 10, wherein (10A, 10B) a.

  Further, the invention according to claim 2 is the following: “The handle 12, the metal replaceable blade mounting member 14 fixed to the tip of the handle 12, and the metal replaceable blade attached to the replaceable blade mount member 14 in a detachable manner. 16, the replacement blade mounting surface 18 a of the replacement blade mounting member 14 is formed with a fitting protrusion 22 and a bolt insertion hole 34, and the replacement blade 16 is fitted with the fitting protrusion 22. A fitting hole 30 for fixing and a hole 28 for inserting a bolt are provided at positions corresponding to the fitting protrusion 22 and a hole 34 for inserting the bolt, respectively. The replaceable blade 16 and the replaceable blade mounting member 14 are fixed by screwing a nut 36 to the tip of the bolt 24 inserted in the hole 28 for bolt insertion formed in the hole 28 and the replaceable blade mounting member 14. A replaceable blade type agricultural implement 10 having a fitting projection 2 is formed in plural, and the gap generated between the bolt 24 and the bolt insertion holes 28 and 34 is larger than the gap generated between the fitting protrusion 22 and the fitting hole 30 ". It is the replaceable blade type agricultural implement 10 (10C).

  In these devices, a plurality of fitting protrusions 22 are formed, and a gap generated between the bolt 24 and the bolt insertion hole 28 (34) is formed between each fitting protrusion 22 and the fitting hole 30. Therefore, even if an excessive impact force is applied to the replaceable blade 16 by swinging down the replaceable blade type agricultural implement 10 or the like, the impact force is applied to the fitting protrusion 22. It is received directly, and an excessive impact force is not directly applied to the bolt 24.

  The invention described in claim 3 is a specific example of the positional relationship between the fitting protrusion 22 and the screw hole 26, and “two fitting protrusions 22 are formed on the replacement blade mounting surface 18a. It is formed by being sandwiched ”.

  The invention described in claim 4 is another example in which the positional relationship between the fitting protrusion 22 and the screw hole 26 is embodied, and “three fitting protrusions 22 are provided on the replacement blade mounting surface 18a. It is formed, and a screw hole 26 is formed inside a triangle having three fitting protrusions 22 as vertices ”.

  According to the first to fourth aspects of the present invention, since an excessive impact force is not directly applied to the bolt, the screw thread of the bolt is not crushed, and the replacement work of the replaceable blade can always be performed reliably. .

  FIG. 1 is a perspective view showing a first embodiment of a replaceable blade type agricultural implement according to the present invention, and FIG. 2 is an exploded perspective view of the replaceable blade type agricultural implement.

  The replaceable blade type farming tool 10 (10A) to which the present invention is applied is a manual work tool that is operated by an operator such as a sickle, a scissors, or a scissors, and includes a handle 12 and a replaceable blade mounting member 14. And a replaceable blade 16.

  The handle 12 is a rod-shaped member made of a high-strength material such as metal or wood. In the first embodiment, a light and durable stainless steel pipe is used as the handle 12. The “length” and “thickness” of the handle 12 are set in consideration of operability when the handle 12 is held and operated, and the “cross-sectional shape” of the handle 12 is a grip when gripped by the hand. It is set in consideration of ease.

  As shown in FIGS. 2 to 4, the replaceable blade mounting member 14 includes a replaceable blade mounting portion 18 and a handle mounting portion 20, which are integrally formed of a metal such as iron.

  The replaceable blade attaching portion 18 is a portion to which the replaceable blade 16 is attached, and is configured by a thick plate-like member formed in a substantially triangular shape in plan view in the first embodiment.

  The replaceable blade mounting surface 18a (the upper surface in FIG. 2) of the replaceable blade mounting portion 18 is a smooth surface, and a fitting protrusion 22 is provided at each corner portion. That is, in the present Example 1, the three fitting protrusions 22 are protrudingly provided on the replaceable blade mounting surface 18a. In the first embodiment, three fitting protrusions 22 are formed. However, in order to achieve the effect of the present invention (that is, two-point support by the fitting protrusions 22), a plurality of fitting protrusions 22 are provided. (2 or more) is sufficient.

  In addition, a screw hole 26 for screwing the bolt 24 is formed on the inner side of the triangle having the three fitting projections 22 as apexes on the replacement blade mounting surface 18a.

  A handle mounting portion 20 is extended on the surface (the lower surface in FIG. 2) of the replaceable blade mounting portion 18 on the side opposite to the replaceable blade mounting surface 18a.

  The handle attaching portion 20 is a portion to which the handle 12 is attached. In the first embodiment, the handle 20 is formed in a rod shape whose outer diameter is substantially equal to the outer diameter of the handle 12, and the tip portion is a hollow portion of the handle 12 The diameter is reduced by one step because it is necessary to be fitted to.

  The shape of the handle attaching portion 20 can be changed as appropriate according to the manner of attachment with the handle 12. For example, although not shown, when a split groove is formed at the tip of the handle 12, the tip shape of the handle attachment portion 20 is a wedge shape (in this case, the tip of the handle attachment portion 20 is The handle 12 and the replaceable blade mounting member 14 are fixed by being inserted into the split groove.)

  The replaceable blade 16 is a thick plate-like member made of a highly rigid material such as steel, and is formed in a substantially isosceles triangle shape in plan view in the first embodiment (see FIG. 2). Both ends on the long side of the replaceable blade 16 are bent in the same direction (bent downward in FIG. 2), and the cross-sectional shape of the replaceable blade 16 is a ship bottom shape, so that the strength of the replaceable blade 16 is increased. Has been enhanced. In addition, baking is put in the long side side front-end | tip part of a replaceable blade.

  In the central portion of the replaceable blade 16, a hole 28 for inserting the bolt 24 and three fitting holes 30 for fitting and fixing the fitting protrusions 22 are located at positions corresponding to the screw holes 26 and the fitting protrusions 22. Each is formed.

  The inner diameter of the fitting hole 30 is set to be approximately equal to the outer shape of the fitting protrusion 22 because the fitting protrusion 22 needs to be fitted and fixed. On the other hand, the inner diameter of the hole 28 for inserting the bolt is set larger than that of the shaft portion of the foot of the bolt 24 so as not to directly contact the bolt 24 in use. In other words, the inner diameter of the bolt insertion hole 28 is such that the gap generated when the bolt 24 is inserted into the bolt insertion hole 28 is larger than the gap generated when the fitting protrusion 22 is fitted into the fitting hole 30. It will be set to be larger.

  When assembling the replaceable blade type agricultural implement 10A, as shown in FIG. 2, first, the handle mounting portion 20 of the replaceable blade mounting member 14 is fitted into the tip of the handle 12, and the members 12, 14 are joined by means such as welding. Join. Thereby, the replaceable blade mounting member 14 is fixed to the handle 12.

  Subsequently, the replaceable blade 16 is positioned with respect to the replaceable blade mounting portion 18, and the fitting protrusion 22 is fitted into the fitting hole 30.

  And if the front-end | tip of the volt | bolt 24 penetrated to the hole 28 of the washer 32 and the replaceable blade 16 is screwed in the screw hole 26, the replaceable blade 16 will be fixed with respect to the replaceable blade attachment member 14. FIG.

  According to the replaceable blade type agricultural implement 10A of the first embodiment, a plurality of fitting protrusions 22 are formed, and a gap generated when the bolt 24 is inserted into the bolt insertion hole 28 causes each fitting protrusion 22 to be formed. Since it is set to be larger than the gap generated when fitted in the fitting hole 30, when an excessive impact force is applied to the replaceable blade 16 by swinging down the replaceable blade type agricultural implement 10 </ b> A, the impact force Will be directly received by the fitting protrusion 22, and an excessive impact force is not directly applied to the bolt 24. Therefore, the thread of the bolt 24 is not crushed and the thread of the bolt 24 is not crushed, and the replacement work of the replaceable blade 16 can always be performed reliably.

  In addition, in the above-mentioned Example, although the replaceable blade mounting surface 18a of the replaceable blade mounting part 18 was flat, what is necessary is just to change the shape of the replaceable blade mounting surface 18a suitably according to the shape of the replaceable blade 16. FIG. For example, as shown in FIGS. 5 and 6, when the cross-sectional shape of the replaceable blade 16 is substantially V-shaped, the cross-sectional shape of the replaceable blade mounting surface 18 a is also substantially V-shaped accordingly ( At this time, the contact surface of the washer 32 with the replaceable blade 16 also has a substantially V-shaped cross section in accordance with the cross-sectional shape of the replaceable blade 16.

  In this case, as the mode of the fitting protrusion 22, the modes shown in FIGS. 5 and 6 are conceivable. That is, when the protruding direction of the fitting protrusion 22 matches the mounting direction of the replaceable blade 16 (see FIG. 5), the protruding direction of the fitting protrusion 22 is orthogonal to the replaceable blade mounting surface 18a. This is the case where the directions match (see FIG. 5). In any case, the fitting hole 30 is appropriately set to a shape and size that allows the fitting protrusion 22 to be fitted.

  Moreover, in the above-mentioned Example, although the shape of the replaceable blade 16 is set to the substantially isosceles triangle shape, For example, the replaceable blade type agricultural implement 10 (10B) of 2nd Example shown to FIGS. 7-8 is shown. In this way, the shape of the replaceable blade 16 may be set to “蒲 鉾”, or may be set to “comb” (not shown). However, in any case, the above-described configuration is adopted for the attachment mode of the replacement blade 16 and the replacement blade attachment member 14.

  In the replaceable blade type agricultural implement 10B of FIG. 7, the two fitting protrusions 22 are formed side by side across the screw hole 26, but the two fitting protrusions 22 are formed in the screw hole 26. It may be formed so as to be arranged in the vertical direction with a gap in between. Of course, three or more fitting protrusions 22 may be formed.

  Further, in the above-described embodiment, the replaceable blade mounting member 14 is formed with the screw hole 26, and the tip of the bolt 24 is screwed into the screw hole 26 to fix the replaceable blade 16 and the replaceable blade mounting member 14. However, as in the replaceable blade type agricultural implement 10 (10C) of the third embodiment shown in FIGS. 9 to 10, a bolt insertion hole 34 is provided instead of the screw hole 26, and this bolt insertion A nut 36 may be screwed onto the tip of the bolt 24 inserted through the hole 34, thereby fixing the replaceable blade 16 and the replaceable blade mounting member 14.

It is a perspective view which shows the replaceable blade type agricultural tool to which this invention was applied. It is a disassembled perspective view which shows a replaceable blade type agricultural implement. It is the perspective view which looked at the replaceable blade attachment member from the upper part. It is the perspective view which looked at the replaceable blade attachment member from the lower part. It is a figure which shows the other attachment aspect of a replaceable blade attachment member and a replaceable blade. It is a figure which shows the further another attachment aspect of a replaceable blade mounting member and a replaceable blade. It is a figure which shows the other aspect of a replaceable blade. It is the sectional view on the AA line of FIG. 7 is a diagram showing a modification of the embodiment. FIG. 10 is a sectional view taken along line B-B in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Replacement blade type agricultural implement 12 ... Handle 14 ... Replacement blade attachment member 16 ... Replacement blade 18 ... Replacement blade attachment part 20 ... Handle attachment part 22 ... Fitting protrusion 24 ... Bolt 26 ... Screw hole 28 ... Hole 30 ... Hole 32 ... washer

Claims (4)

A handle, a metal replaceable blade mounting member fixed to the tip of the handle, and a metal replaceable blade detachably attached to the replaceable blade mounted member,
A fitting protrusion and a screw hole are formed on the replacement blade mounting surface of the replacement blade mounting member,
In the replacement blade, a fitting hole for fitting and fixing the fitting protrusion and a hole for bolt insertion are provided at positions corresponding to the fitting protrusion and the screw hole, respectively.
The replaceable blade type agricultural implement in which the replaceable blade and the replaceable blade mounting member are fixed by screwing the tip of a bolt inserted into the bolt insertion hole into the screw hole,
A plurality of the fitting protrusions are formed, and a gap generated between the bolt and the bolt insertion hole is larger than a gap generated between the fitting protrusions and the fitting hole. A replaceable blade farming tool. A handle, a metal replaceable blade mounting member fixed to the tip of the handle, and a metal replaceable blade detachably attached to the replaceable blade mounted member,
On the replacement blade mounting surface of the replacement blade mounting member, a fitting protrusion and a bolt insertion hole are formed,
In the replacement blade, a fitting hole for fitting and fixing the fitting protrusion and a hole for bolt insertion are provided at positions corresponding to the fitting protrusion and the bolt insertion hole, respectively.
The replacement blade and the replacement blade are inserted into the replacement blade by screwing a nut into a bolt insertion hole formed in the replacement blade and a bolt insertion hole formed in the replacement blade mounting member. It is a replaceable blade type agricultural implement in which the blade mounting member is fixed,
A plurality of the fitting protrusions are formed, and a gap generated between the bolt and the bolt insertion hole is larger than a gap generated between the fitting protrusion and the fitting hole. Replaceable blade farming tool.   3. The replaceable blade type agricultural implement according to claim 1, wherein two of the fitting protrusions are formed on the replaceable blade mounting surface with the screw hole interposed therebetween. Three fitting protrusions are formed on the replacement blade mounting surface,
The replaceable blade type agricultural implement according to claim 1 or 2, wherein the screw hole is formed inside a triangle having the three fitting protrusions as apexes.

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