JPH0620004U - Spare blade for spare blade - Google Patents

Abstract

(57) [Summary] [Purpose] The replacement blade installed on the upper surface of the plane of the blade is obliquely installed, so that the replacement blade with the trailing edge of the replacement blade cut vertically can be used as the replacement blade installation part. Can be fitted and fixed. [Structure] A replacement blade installation portion 4 having a step difference in thickness of the replacement blade 11 is provided at the top end portion of the upper surface, and a thick portion 5 is formed substantially at the center of the paragraph edge of the replacement blade installation portion 4 and the paragraph surface is formed. A spare blade fitting groove 2 that is obliquely provided inward is provided, and a spare blade fitting projection 6 that fits with an elliptical fitting hole 12 provided in the spare blade 11 is provided at approximately the center of the spare blade installation portion 4. Is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a blade for a spare blade, which makes it possible to provide a low-cost spare blade, and which is easy to install and does not cause blade runout (so-called chatter) during use. .

[0002]

[Prior art]

 Conventionally, replacement blade type planes that do not require blade sharpening and backing work have been widely used because of their convenience. For example, it has been proposed that a spare blade fitting portion is provided at the tip of the hook and the spare blade is fitted or screwed into the projection of the hook so that the spare blade does not shake during use. (Actual No. 55-120902, No. 62-20805, No. 57-98804, No. 57-113905).

[0003]

[Problems to be solved by the device]

 However, it was not possible to completely eliminate the blade run-out during use just by fitting the spare blade into the projection of the plane like this. This is because it is difficult to fit the protrusions and the locking holes so that they are completely engaged with each other, so that the locking holes are formed with some allowance. In addition, in the case where the replacement blade is screwed on with a screw or the like, not only is it troublesome, but also the spiral rod may be bent and the replacement blade may not be removable. Also, since the plane is slid by pressing it against the wood to be cut, if the trailing edge of the spare blade and the paragraph edge of the spare blade fitting part are not in complete contact, the spare blade will move slightly and the blade shakes. This is likely to occur. Therefore, it is conceivable that the replacement blade fitting groove is obliquely provided inward and the rear end of the replacement blade is obliquely provided outwardly so as to be fitted into the fitting groove. However, the manufacturing process of the spare blade becomes complicated, leading to cost increase, and it is unavoidable that some errors occur, so it is technically difficult to make the fitting parts of the two completely coincide. there were. The present invention is intended to solve such a problem.

[0004]

[Means for Solving the Problems]

 The replacement blade installation portion 4 having a step difference in thickness of the replacement blade 11 is provided at the tip of the upper surface, and the thickened portion 5 is formed substantially at the center of the paragraph edge of the replacement blade installation portion 4 and the paragraph surface is directed inward. An obliquely provided replacement blade fitting groove 2 is provided, and a replacement blade fitting projection 6 that fits with an elliptical fitting hole 12 provided in the replacement blade 11 is provided at substantially the center of the replacement blade installation portion 4. It will be. The replacement blade fitting projection 6 may be an elliptical projection corresponding to the elliptical fitting hole 12 provided in the replacement blade 11, or two pieces adapted to lock both ends of the elliptical fitting hole 12. May be a protrusion.

[0005]

[Work]

 Since the present invention has the above-mentioned configuration, it has the following effects. The edge of the spare blade 11 is slightly raised so that the trailing edge is attached to the paragraph surface of the spare blade installation section 4 and the fitting hole 12 of the spare blade 11 and the spare blade fitting projection 6 of the spare blade installation section 4 are inserted. The blade 11 of the spare blade 11 is pushed down so that the fitting hole 12 of the spare blade 11 engages with the spare blade fitting protrusion 6 by sliding to the place where the spare blade 11 is engaged. It can fit perfectly. The hook 1 thus constructed may be put along the charging surface of the hook base 21 and charged in the charging groove 22. However, the screw holes for adjustment are provided in the screw holes provided in the front and rear portions of both side walls of the hook scrap discharge port 24 provided in the hook base 21. By screwing 31 and 32 and pressing the both ends of the hook 1 and the both ends of the blade 11 with the tips of the screw rods 31 and 32, the hook 1 can be more completely fixed to the hook 21.

[0006]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a plane, which has a step of the thickness of the spare blade 11 at the tip portion, and forms a thick portion 5 of about 0.5 mm on the top of the plane of the step approximately at the center. A spare blade installation portion 4 having a spare blade fitting groove 2 in which the rear end edge of the paragraph surface is obliquely provided inward is formed. Reference numeral 6 denotes a spare blade fitting projection, which is provided in substantially the central portion of the spare blade installation portion 4 so as to correspond to the fitting hole 12 of the spare blade 11, and the spare blade fitting projection 6 is shown in FIG. It may be two such protrusions, or may be an elliptical protrusion as shown in FIG. Reference numeral 11 denotes a spare blade, which is provided with an elliptic fitting hole 12 which engages with a spare blade fitting projection 6 provided on the hook 1 in the transverse direction of the central portion. Reference numeral 21 denotes a plane, which is provided with a charging groove 22 for charging the plane 1 and screwed into screw holes provided on both side walls of the plane scrap discharge port 24 so as to press both side edges of the plane 1 and the spare blade 11. The rods 31, 32 are screwed in.

[0007]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. Since the thick portion 5 is formed in the substantially central portion of the paragraph edge, the upper edge of the fitting groove of this portion slightly protrudes from the other portion, and this protruding portion fits the upper edge of the rear end of the spare blade 11. It can be easily fixed to the body. As a result, there is no need for a step of obliquely arranging the rear end of the replacement blade outward, and since the rear end can be used while being cut vertically, it is possible to provide a cheap replacement blade. Not only can the replacement blade 11 be easily replaced, but since the replacement blade fitting groove 2 is obliquely provided inward, the thick portion 5 covers almost the center of the rear edge of the replacement blade 11. Since it will be fixed, it can be completely abutted and fixed to the paragraph surface of the plane 1. Therefore, the runout of the blade during use can be almost completely eliminated, and a plane excellent in cutting can be provided. Increasing the rear end of the replacement blade in an outward direction so as to fit the replacement blade fitting groove 2 complicates the manufacturing process and increases the cost. Since the upper edge of the spare blade fitting groove 2 of this part is projected more than other parts because it is formed in almost the center of the paragraph, it is possible to use a vertically cut rear end of the spare blade, which is inexpensive. It is possible to provide a spare blade. Further, two replaceable blade fitting projections 6 provided at approximately the center of the replaceable blade fitting portion are provided so as to correspond to both ends of the oblong fitting hole 12 provided in the replaceable blade 11 as shown in FIG. If it is a protrusion, even if there is a slight error in the hole of the fitting hole 12, it can be engaged almost completely and the chattering phenomenon can be easily prevented.

[0008]

[Brief description of drawings]

FIG. 1 is a front view of a plane of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of a spare blade to be installed on the plane of the present invention.

FIG. 4 is a front view showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view of an essential part showing a state in which the present invention is mounted on a plane.

[Explanation of symbols]

 1 Body 2 Spare blade fitting groove 4 Spare blade installation part 5 Thick part 6 Spare blade fitting protrusion

Claims (3)

[Scope of utility model registration request] 1. A replaceable blade setting portion 4 having a step difference in thickness of the replaceable blade 11 is provided at a tip portion of an upper surface, and a thick portion 5 is formed at a substantially central portion of a paragraph edge of the replaceable blade setting portion 4 and a paragraph. A replacement blade fitting groove 2 whose surface is inclined inward is provided, and a replacement blade fitting for fitting with an elliptical fitting hole 12 provided in the replacement blade 11 is provided at substantially the center of the replacement blade installation portion 4. A blade for spare blades provided with protrusions 6. 2. A replaceable blade body in which the replaceable blade fitting projection 6 is an oval projection. 3. A blade for a replacement blade, wherein the replacement blade fitting projection 6 is two projections corresponding to both ends of an oval fitting hole 12 provided in the replacement blade 11.