JPH0560804U - Saw blade and replaceable saw - Google Patents

Abstract

(57) [Summary] [Purpose] In a replaceable saw, the structure for fixing the saw blade and the connecting auxiliary plate has been improved, and the handle has been reinforced to improve usability.
To realize a long-life blade saw. [Structure] A saw blade 11 and a connecting auxiliary plate 21 of a replaceable saw have first and second protruding portions 27 on the connecting auxiliary plate 21 side on first and third penetrating portions 13 and 15 on the saw blade 11 side. , 28 are inserted, the saw blade fixing screw 20 is screwed into the screw hole 26 on the connecting auxiliary plate 21 side through the second penetrating portion 14 on the saw blade 11 side and is in a fixed state. . Further, the auxiliary connecting plate 21 and the handle 33 are fixed via a reinforcing cylinder 35 embedded in the tip surface of the handle 33.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a saw blade and a replaceable saw, and more particularly to a technique for fixing a saw blade and a handle.

[0002]

[Prior Art]

 In general, the saw blade and handle that make up the saw are more likely to be damaged on the saw blade side. Therefore, even if the saw blade is damaged, only the saw blade can be replaced. In the above, two auxiliary connecting plates 71a and 71b are provided on the tip side of the handle 83, the saw blade base 61a is inserted between them, and they are fixed by the saw blade fixing screw 70. It is structured to In the saw blade having such a configuration, the saw blade base 61a is formed with the first penetrating portion 63 and the second penetrating portion 64 from the base end side toward the tip end side. These penetrating portions 63 and 64 are integrally formed as a guide groove 62 extending from the second penetrating portion 64 to the base edge 61b of the saw blade base. On the other hand, of the two connection auxiliary plates 71a and 71b, the connection auxiliary plate 71a on one side has the inside of the first penetrating portion 63 of the saw blade 61 from the base end side toward the tip side. A first protrusion 77 to be fitted into the blade and a screw hole 76 into which the saw blade fixing screw 70 is to be screwed are formed through the second penetrating portion 64 of the saw blade 61. Therefore, the guide groove 62 of the saw blade 61 is screwed into the open end of the guide groove 62, that is, the first penetrating portion 63 and the screw hole 76 of the connecting auxiliary plate 71a through the through hole 75 of the connecting auxiliary plate 71b on the other side. When the saw blade 61 is inserted between the two auxiliary connecting plates 71a and 71b from the state where the saw blade fixing screw 70 is aligned, the inside of the first penetrating portion 63 of the saw blade 61 is inserted. While the first protrusion 77 of the auxiliary connection plate 71a is positioned, the saw blade fixing screw 70 is positioned inside the second penetrating portion 64 of the saw blade 61. Therefore, the saw blade fixing screw 70 is screwed. By stopping, the saw blade 61 is fixed between the auxiliary connecting plates 71a, 71b. Further, the saw blade 61 can be removed from between the auxiliary connecting plates 71a and 71b by the reverse operation. Further, on the side of the saw blade 61, a third penetrating portion 65 as a groove expanding portion is formed at an intermediate position between the first penetrating portion 63 and the second penetrating portion 64, while a connecting auxiliary plate is formed. Since the second protrusion 78 having a width narrower than the groove width of the third penetrating portion 65 is provided on the side of 71a, it is blocked by the connection auxiliary plate 71b on the other side and is being attached. Even if the base portion 61a of the saw blade 61 cannot be directly visually inspected, when the connection auxiliary plate 71a and the saw blade 61 have a predetermined positional relationship, the second protrusion 78 is inserted inside the third penetrating portion 65. It is also possible to confirm the positional relationship between the auxiliary connecting plate 71a and the saw blade 61 based on the feeling at the time.

[0003]

[Problems to be solved by the device]

 However, in the conventional replaceable saw having such a structure, it is possible to exert a force for fixing the saw blade 61 and the connection auxiliary plate 71 against the force applied to the saw blade 61 during cutting of wood or the like. Since the saw blade fixing screw 70 is substantially used, the saw blade fixing screw 70 is easily loosened and easily damaged. Therefore, not only is it necessary to frequently retighten the saw blade fixing screw 70, but the saw blade fixing screw 70 may be damaged even if the saw blade 61 is not damaged, and replacement work is required each time. As a result, work efficiency is poor, and there is a problem in terms of safety.

That is, the screw of the saw blade fixing screw 70 is applied to both the force applied to the saw blade 61 in one direction (direction of arrow A) and the vertical force (direction of arrow B). The force of attachment acts as a force for fixing the saw blade 61, and the engagement force between the third penetrating portion 65 and the second protruding portion 78 depends on the size of the third penetrating portion 65 of the third penetrating portion 65. Since it is larger than the size, it does not act as a force for fixing the saw blade 61. Here, if the size of the second protruding portion 78 and the size of the third penetrating portion 65 are matched, it becomes difficult for the second protruding portion 78 to enter the third penetrating portion 65, and the saw blade 61 is attached. It becomes difficult to confirm the time alignment.

In addition, at the tip end side of the handle 83 from which the auxiliary connecting plates 71a and 71b are extended, particularly at the proximal end portion of the auxiliary connecting plates 71a and 71b, the force transmitted through the saw blade 61 is concentrated. However, since the connecting auxiliary plates 71a and 71b are directly fixed to the inside of the storage hole 83a of the handle 83, the handle 83 is not able to withstand the force applied to its tip side and is damaged. There is also the problem of being lost.

In view of the above problems, the first object of the present invention is to improve the structure for fixing the saw blade and the connecting auxiliary plate so that the saw blade fixing screw is not easily loosened and is not easily damaged. It is to realize a blade saw that can easily perform blade replacement work. A second object of the present invention is to further realize a replaceable saw capable of preventing damage to the handle by reinforcing the inside of the hole for receiving the handle. That is, an object of the present invention is to improve the connecting structure of each member constituting the replaceable saw to realize a replaceable saw with good usability.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned first problem, the means taken in the present invention is, in the fixing structure of the saw blade and the auxiliary connecting plate, the connecting auxiliary plate extending to the tip side of the handle. The saw blade base is detachably fixed to the saw blade base, and the saw blade base has a first penetrating portion, a second penetrating portion, and a third penetrating portion from the base end side toward the tip side. A penetrating portion is formed, and the first penetrating portion is formed in an open state at its base edge, while the second penetrating portion extends from this penetrating portion to the side edge of the saw blade base. On the other hand, the auxiliary connecting plate is formed as a groove, and from the base end side to the front end side, the first protrusion that is to be fitted inside the first penetrating portion of the saw blade and the first auxiliary portion of the saw blade are formed. A screw hole into which a saw blade fixing screw is to be screwed through the second penetrating portion, and a second protruding portion to be fitted into the third penetrating portion of the saw blade. There to kick it.

Further, the saw blade base portion is formed with a first penetrating portion, a second penetrating portion and a third penetrating portion from the base end side toward the tip end side, and these penetrating portions The first and second penetrating parts are integrally formed as a guide groove extending from the second penetrating part to the base end edge of the saw blade base, while the connecting auxiliary plate has its base end. From the side to the tip side, a saw blade fixing screw is screwed through the first protrusion that should be fitted into the first through portion of the saw blade and the second through portion of the saw blade. A power screw hole and a second protrusion to be fitted inside the third penetrating portion of the saw blade are provided.

Further, in order to solve the above-mentioned second problem, in the fixing structure of the connection auxiliary plate and the handle, the connection auxiliary plate has a neck portion in which an engaging recess is formed at a side edge. On the other hand, the handle has an insertion part into which the neck part of the auxiliary connecting plate should be inserted inside the accommodation hole opened at the tip end face, and the handle is bent in the opposite direction from the open end of the insertion part along the tip end face of the handle. A reinforcing cylinder having a stripped reinforcing part, and with the neck part of the connecting auxiliary plate fitted inside the insertion part of the reinforcing cylinder, a supplementary part formed at a position corresponding to the engaging recess. The tip of the fixing screw screwed through the screw hole of the strong cylinder and the through hole of the handle engages with the engaging recess of the neck, and the connecting auxiliary plate is detachably extended to the tip side of the handle. It is characterized by that.

[0010]

[Action]

 According to such means, the saw blade and the connection assisting plate engage the first and third penetrating portions on the saw blade side with the first and second protrusions on the connection assisting plate side at two positions respectively. Therefore, since the engaging force is strong, the fixing strength is sufficiently secured even with one connecting auxiliary plate. Therefore, the saw blade can be attached to the auxiliary connecting plate while looking directly at the saw blade, and the replacement blade operation is easy. Further, since the saw blade fixing screw is arranged between these engaging positions, the force applied to the saw blade fixing screw is small when cutting wood or the like. Therefore, since the saw blade fixing screws are not loose or damaged, they need not be refastened or replaced frequently, which makes them easy to use and safe.

Further, since the connecting auxiliary plate and the handle are fixed by the reinforcing cylindrical body inserted and fixed in the accommodation hole of the handle, the stress applied when cutting wood or the like is locally applied to the handle, for example, the tip of the handle. Since the edges are not concentrated, the handle is not easily damaged and it is easy to use.

[0012]

【Example】

 [Embodiment 1] A replaceable saw according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing the structure of a replaceable saw according to this embodiment.

In the figure, the replaceable saw has a saw blade 11, a connecting auxiliary plate 21 and a handle 33. Among these, the saw blade 11 and the connecting auxiliary plate 21 and the connecting auxiliary plate 21 The handle 33 and the handle 33 are detachably fixed to each other.

A first penetrating portion 13, a second penetrating portion 14, and a third penetrating portion 15 are formed on the base portion 11a of the saw blade 11 from the base end 11b side toward the tip end side, The first penetrating part 13 is formed as a semicircular notch formed in an open state at the edge of the base end 11b, and the second penetrating part 14 is a circle centered on the first penetrating part 13. The guide groove 12 is formed in an arc shape from this penetrating portion to the side edge of the saw blade base 11a, and the shape of the groove end is semicircular. The shape of the third penetrating portion 15 is a round hole.

Here, comparing the sizes of the first penetration portion 13 and the third penetration portion 15, the size of the first penetration portion 13 is larger. Further, the groove width of the guide groove 12 which is the second penetrating portion 14 is larger than that of the third penetrating portion 15 and smaller than that of the first penetrating portion 13.

On the other hand, the connecting auxiliary plate 21 has a first protrusion 27 to be fitted into the first penetrating portion 13 of the saw blade 11 from the base end side toward the tip end side, and a saw blade. A screw hole 26 into which the saw blade fixing screw 20 is to be screwed through the second penetrating portion 14 of No. 11, and a second protrusion to be fitted into the inside of the third penetrating portion 15 of the saw blade 11. And a part 28. The first protrusion 27 and the second protrusion 28 are both circular. Further, comparing the sizes of the protrusions, the diameter of the first protrusion 27 is about twice as large in diameter. Here, the auxiliary connecting plate 21 has a neck portion 21a having an engaging recess 22 formed on the side edge thereof.

Further, the handle 33 is provided with a storage hole 34 that opens at its tip surface 33 a, and a reinforcing cylinder 35 is inserted and fixed inside the storage hole 34.

(Fixing Structure of Connection Auxiliary Plate and Handle) FIGS. 2 to 4 are detailed views showing the structure of the connection auxiliary plate 21 and the handle 33.

The reinforcing tubular body 35 is composed of a first side face forming member 35a, a second side face forming member 35b, and a screw fixing plate 35c. The first side face forming member 35a has upper and lower ends. The upper edge portion 40 and the lower edge portion 41 which are projected in the horizontal direction, the reinforcing portion piece 42 which projects outward from the tip end surface 33a of the handle 33 and is bent outward of the tip end surface 33a, and the connection auxiliary plate 21. It has a notch 36a formed at the lower end position corresponding to the engaging recess 22. Further, the second side surface forming member 35b has a reinforcing portion piece 43 protruding outward from the tip end surface 33a of the handle 33 and bent to the outside of the tip end surface 33a, and an engaging recess 22 of the connecting auxiliary plate 21. And a notch 36b formed at the corresponding lower end position. Here, when the first side face forming member 35a, the second side face forming member 35b, and the screw fixing plate 35c are brought into contact with each other to form the reinforcing tubular body 35, the first side face forming member 35a is inserted and fixed in the storage hole 34 of the handle 33. In addition, an insertion hole 38 (insertion portion) having a cross-sectional shape substantially equal to the cross section of the neck portion 21a of the auxiliary connecting plate 21 is formed by the upper edge portion 40 and the lower edge portion 41 of the first side surface forming member 35a. Formed within. Further, the notch 36a provided at the lower end of the first side face forming member 35a and the notch 36b provided at the lower end of the second side face forming member 35b are in contact with each other to form the engaging notch groove 36. It has a structure.

Further, the screw fixing plate 35c has a screw hole 37 at a position corresponding to the engaging cutout groove 36, while the handle 33 has a storage hole 34 at a position corresponding to the screw hole 37 of the screw fixing plate 35c. Through hole 39a is formed, and a fixed screw 39 is screwed into the screw hole 37 from the outside of the handle 33.

On the tip end side of the handle 33 having such a configuration, the auxiliary connecting plate 21 is inserted into the insertion hole 38 of the reinforcing tubular body 35, and the rear end 21 b of the connecting portion of the auxiliary connecting plate 21 is attached to the front end surface of the handle 33. 33a, and in this state, the fixing screw 39 is screwed into the engaging recess 22 to engage the tip end portion of the fixing screw 39 with the auxiliary connecting plate 21 on the tip surface 33a of the handle 33. Extends in a detachable manner.

(Fixing Structure of Saw Blade and Connection Auxiliary Plate) FIG. 5 is a perspective view showing a structure of the base portion 11 a of the saw blade 11 and the connection auxiliary plate 21.

Here, the fixing structure of the saw blade 11 and the connection auxiliary plate 21 will be described in accordance with the procedure for attaching them.

In order to fix the saw blade 11 to the connecting auxiliary plate 21, first, the saw blade fixing screw 20 is screwed into the screw hole 26 several times from the surface side having the protrusion of the connecting auxiliary plate 21. deep. Next, the saw blade 11 is placed on the auxiliary connecting plate 21, and the first penetrating portion 13 and the first protruding portion 27 are fitted therein. Then, using the first protrusion 27 as a fulcrum, the saw blade 11 is rotated so as to slide on the connection auxiliary plate 21, and the third penetrating portion 15 and the second protrusion 28 are fitted. The saw blade 11 is positioned. At this time, since the groove width of the guide groove 12 has an appropriate size with respect to the diameter of the saw blade fixing screw 20, it is used as a guide portion for the saw blade fixing screw 20. Here, since there is only a slack necessary for fitting between the first and third penetrating portions 13 and 15 and the first and second protruding portions 27 and 28, the saw blade 11 has rattling. It is positioned with the connecting auxiliary plate 21 with almost no. Then, the saw blade fixing screw 20 is screwed in to fix the saw blade 11.

Further, the saw blade 11 can be detached from the auxiliary connecting plate 21 by these reverse operations.

(Effect of Embodiment 1) From the above, in the replaceable saw according to the present embodiment, the saw blade 11 and the connection auxiliary plate 21 are the first and third penetrating portions 13 and 15, and the first and second penetrating portions 13 and 15. The saw blade fixing screw 20 is firmly fixed by the second protrusions 27 and 28, and the saw blade fixing screw 20 is located between them, so that the saw blade fixing screw 20 receives the saw blade when cutting wood or the like. The power is small. Therefore, the saw blade fixing screw 20 is not easily loosened and is not easily damaged, and therefore the frequency of re-tightening and replacement is low. Therefore, in addition to being easy to use, it is also safe.

Further, since the connecting auxiliary plate 21 and the handle 33 are fixed via the reinforcing tubular body 35 provided on the handle 33, stress applied when cutting wood or the like is not concentrated on the local portion of the handle 33. Therefore, the handle 33 is not damaged and is easy to use.

Example 2 A replaceable saw according to this example will be described with reference to FIG. Here, components having the same functions as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The replaceable saw of the present example is different from that of the first embodiment in the shape of the penetrating portion provided in the saw blade, and this point will be described below.

(Fixing Structure of Saw Blade and Connection Auxiliary Plate) FIG. 6 is a perspective view showing a structure of the saw blade 11 and the connection auxiliary plate 21 according to this example.

The fixing structure of the saw blade 11 and the auxiliary connecting plate 21 will be described according to the procedure for attaching them.

A first penetrating portion 17, a second penetrating portion 18, and a third penetrating portion 19 are formed in the saw blade base 11f from the base end 11g side toward the tip side, and these The first and second penetrating portions 17 and 18 of the penetrating portion are integrally formed as a guide groove 16 extending from the second penetrating portion 18 to the edge of the base end 11g of the saw blade base 11f.

When the sizes of the guide groove 16 that is the first and second penetrating portions 17 and 18 and the size of the third penetrating portion 19 are compared, the guide groove 16 is larger and the end of the guide groove 16 is larger. The portion has a semicircular shape, and the third penetrating portion 19 has a circular shape.

In order to fix the saw blade 11 to the connection auxiliary plate 21, first, the saw blade fixing screw 20 is screwed into the screw hole 26 several times from the surface side having the protrusion of the connection auxiliary plate 21. Keep it.

Next, the base portion 11f of the saw blade 11 is placed on the tip side of the auxiliary connecting plate 21, and the saw blade 11 is moved straight to the handle 33 side. At this time, the guide groove 16 is used as a guide portion for the saw blade fixing screw 20. In this way, when the saw blade 11 is moved toward the handle 33, the second protrusion 28 is fitted into the third penetrating portion 19 and the saw blade 11 is positioned. Here, since there is only a slack necessary for fitting between the first and second penetrating portions 17 and 19 and the first and second protruding portions 27 and 28, the saw blade 11 has no rattling. It is positioned with the auxiliary connecting plate 21 with almost no state. Then, the saw blade fixing screw 20 is screwed in to fix the saw blade 11.

Further, the saw blade 11 can be detached from the auxiliary connecting plate 21 by the reverse operation.

(Effects of Second Embodiment) As described above, also in the replaceable saw according to the present embodiment, the saw blade 11 and the auxiliary connecting plate 21 have the first and third penetrating portions 17 and 19, and the first and third penetrating portions. Since the second protrusions 27, 28 are fixed at two places, the same effect as that of the first embodiment can be obtained. That is, since the frequency of re-tightening and replacing the saw blade fixing screw 20 is low, it is convenient and safe.

As described above, in any of the embodiments, by improving the connecting structure of each member constituting the replaceable saw, it is possible to realize a replaceable saw that is convenient and safe.

[0040]

[Effect of the device]

 As described above, in the blade saw according to the present invention, the saw blade and the connection auxiliary plate include the first and third penetrating portions on the saw blade side and the first and second projections on the connection auxiliary plate side. It is fixed at two points by means of, and in addition to the strong engagement force between these penetrating parts and the projections, it is characterized in that the saw blade fixing screw is located between these. There is. Therefore, according to the present invention, in addition to the saw blade being directly mounted in a visible state, the saw blade fixing screw receives a small force when cutting wood, so that the saw blade fixing screw is not loosened or damaged. Is less likely to occur. Therefore, since the frequency of re-tightening the screw for fixing the saw blade and the frequency of replacement are low, it is easy to use and safe.

Further, since the connecting auxiliary plate and the handle are fixed via the reinforcing tubular body, stress applied when cutting wood or the like is not concentrated on the local part of the handle, so that the handle is less likely to be damaged and easy to use. Has the effect of being good.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a structure of a replaceable saw according to a first embodiment of the present invention.

2 is an explanatory view showing a structure of a handle and a connection auxiliary plate of the replaceable saw shown in FIG. 1. FIG.

FIG. 3 is an explanatory view showing a structure of a handle and a connecting auxiliary plate of the replaceable saw shown in FIG.

4 is an explanatory view showing a structure of a handle and a connection auxiliary plate of the replaceable saw shown in FIG. 1. FIG.

FIG. 5 is an explanatory view showing a structure of a saw blade and an auxiliary connecting plate of the replaceable saw according to the first embodiment of the present invention.

FIG. 6 is an explanatory view showing a structure of a saw blade and a connecting auxiliary plate of a replaceable saw according to a second embodiment of the present invention.

FIG. 7 is an explanatory view showing a structure of a saw blade, a connecting auxiliary plate and a structure of a conventional replaceable saw.

[Explanation of symbols]

11, 11a, 11b, 11f, 11g, 61, 61a
... Saw blades 12, 16, 62 ... Guide grooves 13, 14, 15, 17, 18, 19, 63, 64, 6
5 ... Penetration part 20, 70 ... Saw blade fixing screw 21,21a, 21b, 71a, 71b ... Connection auxiliary plate 22 ... Engagement recess 26, 37, 76 ... Screw hole 27, 28, 77, 78 ... Protrusion 33, 33a, 83, 83a ... Handle 34 ... Storage hole 35, 35a, 35b ... Reinforcing cylinder 36 ... Engagement notch groove 36a, 36b・ ・ ・ Notch part 35c ・ ・ ・ Screw fixing plate 38 ・ ・ ・ Insertion hole (insertion part) 39 ・ ・ ・ Fixing screw 39a ・ ・ ・ Through hole 40 ・ ・ ・ Reinforcing cylinder upper edge 41 ・ ・ ・ Reinforcing cylinder Lower body edge 42, 43 ... Reinforcing cylinder body piece 75 ... Through hole

Claims (4)

[Scope of utility model registration request] 1. A saw blade in which a first penetrating portion, a second penetrating portion and a third penetrating portion are formed from a base end side of a saw blade base toward a tip side thereof, wherein the first penetrating portion is formed. The penetrating portion is formed in an open state at its base edge, while the second penetrating portion is formed as a guide groove extending from this penetrating portion to the side edge of the saw blade base. The characteristic saw blade. 2. The saw blade base of the saw blade as defined in claim 1,
A replaceable saw removably fixed to a connecting auxiliary plate extending to a tip side of a handle, wherein the connecting auxiliary plate has a first saw blade that extends from the base end side toward the tip side. A first projection to be fitted inside the through portion of the saw, and a screw hole into which a saw blade fixing screw is screwed through the second through portion of the saw blade,
A replaceable saw, comprising: a second protrusion to be fitted inside the third penetrating portion of the saw blade. 3. A replaceable saw in which a saw blade base portion of a saw blade is detachably fixed to a connecting auxiliary plate extending to a tip side of a handle,
In the saw blade base, from the base end side toward the tip side,
A first penetrating portion, a second penetrating portion, and a third penetrating portion are formed, and the first and second penetrating portions of the penetrating portions are formed from the second penetrating portion to the saw. While being integrally formed as a guide groove extending to the base end edge of the body base, the connecting auxiliary plate is fitted into the first penetrating portion of the saw blade from the base end side toward the tip side. And a screw hole into which a saw blade fixing screw is to be screwed through the second penetrating portion of the saw blade, and the third penetrating portion of the saw blade. A replaceable saw having a second protrusion to be formed. 4. The connection auxiliary plate according to claim 2 or 3, wherein the connection auxiliary plate has a neck portion having an engagement recess formed at a side edge thereof, while the handle is inside a storage hole opened at a tip end surface thereof. , A neck portion having a plug-in portion to be inserted and a reinforcing tubular body including a reinforcing portion piece bent in the opposite direction from the opening portion of the plug-in portion along the tip surface of the handle,
With the neck portion of the connecting auxiliary plate fitted and inserted into the insertion portion of the reinforcing cylinder, the screw hole of the reinforcing cylinder and the through hole of the handle formed at the position corresponding to the engaging recess are formed. The blade is characterized in that the tip end portion of a fixing screw screwed through is engaged with the engagement recessed portion of the neck portion, and the connection auxiliary plate is detachably extended to the tip end side of the handle. saw.