JPH07266129A - Blade tool fitting device for reciprocating cutting tool - Google Patents

Abstract

PURPOSE:To prevent the situation that a blade tool can not be installed due to a mistake in selecting the blade tool installation type of a cutting tool not to perform a cutting work by forming a blade tool fitting device in such a manner that either a blade tool having a fitting hole or a blade tool having a fitting projection can be freely installed. CONSTITUTION:A knob is turned in the loosening direction to form a space enought to insert a blade tool between both clicks 4, 5. In the case of installing a 'hole type' blade tool B1, after the blade tool Bl is inserted between both clicks 4, 5, cylindrical projections 4e, 4f are respectively fitted in large and small holes (a), (b), and the inserted tip part of the blade tool B1 is pressed to the front of the click 4. In the case of installing 'projection type' blade tool B2, with the blade tool B2 inserted in both recessed parts 5, 5g of the click 5, the inserted tip part of the blade tool B2 is pressed to the front of the click 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device for mounting a cutting tool such as a so-called reciprocating saw or a jigsaw that reciprocates the cutting tool.

[0002]

2. Description of the Related Art Conventionally, there are two types of cutting tools used in this type of cutting tool with respect to their mounting modes. That is, as shown in FIG. 10 (a), a cutting tool B1 (hereinafter referred to as "hole type") in which a head (mounting side end) is provided with large and small holes a and b, for example, Figure
As shown in (b), there are two kinds of cutting tools B2 (hereinafter referred to as "projection type") in which the projections c and c that project laterally are provided on the head. The former hole type cutting tool B1 is installed on the mounting device side. For example, the protrusions forming a columnar body are fitted into the holes a and b and hooked in the direction of removal, and the latter projection type cutting tool B2 is provided with protrusions c and c in the recesses provided on the mounting device side. It is configured so that it cannot be removed by hanging it.

[0003]

[Problems to be Solved by the Invention] However, in the past,
No cutting tool has been provided with a mounting device capable of mounting any of the above two types of cutting tools B1 and B2. For this reason, when using a cutting tool, it is necessary to prepare a dedicated cutting tool that is compatible with the mounting type, and if a cutting tool of a different type is prepared, the cutting tool cannot be installed, so the cutting tool can be used. It was very inconvenient.

Although a mounting device for mounting two types of cutting tools having different mounting portion widths is provided as disclosed in Japanese Utility Model Laid-Open No. 5-80624, for example, such a mounting device is also provided. Both the hole type and the projection type were not configured to be attached.

Therefore, an object of the present invention is to provide a cutting tool mounting device for a cutting tool, which can be mounted on any cutting tool of the above two types of mounting.

[0006]

To this end, the invention according to claim 1 is a mounting device for mounting a cutting tool on a reciprocating cutting tool, comprising a cutting tool having a mounting hole or a mounting projection. It is characterized in that it can be attached to any of the cutting tools.

The invention according to claim 2 is the blade attaching device according to claim 1, wherein the blade attaching device has a pair of claws mounted so as to be close to or apart from each other so as to sandwich the blade, On the opposite surface of one of the claws, there is provided a protrusion that is inserted into the hole of the cutting tool having a hole for attachment and is hooked so that the cutting tool cannot be pulled out in the removing direction, and on the opposite surface of the other claw It is characterized in that a cutting tool having a projection for use is provided with a concave portion for inserting the projection and hooking it in a removal direction so as not to come off.

The invention according to claim 3 is the blade attaching device according to claim 1, which is a blade attaching device having a pair of pinching means capable of pinching the blade by tightening a setscrew. Is provided with a protrusion that is inserted into the hole of a cutting tool having a mounting hole and that is hooked irremovably in the removal direction, and a cutting tool that has a mounting projection on the opposite surface of the other claw. The present invention is characterized in that a concave portion is provided for inserting the protrusion and hooking in the removal direction so as not to come off.

[0009]

According to the structure of the first aspect, a cutting tool having a mounting hole or a cutting tool having a mounting projection can be mounted. It is not necessary to check the cutting tool installation type of the cutting tool used for the work, and the cutting tool cannot be installed because the cutting tool installation type of the cutting tool is wrong. Absent.

According to the second aspect of the present invention, the pair of claws are brought closer to each other so that the blade tool is attached by sandwiching the blade tool therebetween, while being separated from each other, the blade tool is provided therebetween. It can be inserted, and the sandwiched cutting tool can be removed. Here, the approaching or separating of the claws is often realized by rotating a knob. Therefore, if a blade tool of a type having a mounting hole is to be attached, the blade tool is pressed against the facing surface of one of the claws while the knob is rotated to separate the claws from each other. Insert the projection into the hole of the cutting tool, and then, while keeping this state, return the knob in the opposite direction to bring both claws close to each other and sandwich the cutting tool, and the cutting tool will move in the removal direction. It is fixed so that it cannot be pulled out, and it is firmly attached without rattling. On the other hand, if a cutting tool of a type having a mounting projection is to be attached, the cutting tool is pressed against the facing surface of the other claw while the knob is rotated to separate the claws from each other. Insert the projection of the other into the concave part of the other claw, and then, while keeping this state, return the knob in the opposite direction to bring both claws close to each other and sandwich the relevant cutting tool, and the cutting tool will be removed. It is hooked in the direction that cannot be pulled out, and it is firmly attached without rattling. As described above, since it is possible to attach a cutting tool of a type having a mounting hole or a cutting tool of a type having a mounting projection, it is possible to mount a cutting tool of a cutting tool used for cutting work as in the conventional case. There is no need to check the type, and the cutting tool cannot be attached because the cutting tool mounting type of the cutting tool is wrong. Therefore, the cutting operation cannot be performed. In particular, in the case of this configuration, since the cutting tool can be attached or detached only by rotating the knob without using a hand tool such as a screwdriver, the above-described action is exhibited in addition to the convenience at the time of attaching or detaching the cutting tool. .

According to the third aspect of the present invention, when the setscrew is tightened, the pair of sandwiching means come close to each other so that the cutting tool can be sandwiched between the two, while when the setscrew is loosened, the pair of sandwiching means becomes It is possible to separate the blades from each other and insert the blades between them, and to take out the sandwiched blades. If a type of blade having a mounting hole is to be attached, the blade is pressed against one of the sandwiching means by loosening the set screw and separating the pair of sandwiching means from each other. Insert the protrusion into the hole of the cutting tool, and then, while maintaining this state, tighten the setscrews so that the sandwiching means come close to each other and sandwich the cutting tool, and the cutting tool cannot be removed in the removal direction. It is hooked on and firmly attached without rattling. On the other hand, if a blade tool of a type having a mounting projection is to be attached, the blade tool is pressed against the other sandwiching means while loosening the set screw and separating the pair of sandwiching means from each other. Insert the protrusion of the cutting tool into the recess of the other sandwiching means, and then, while maintaining this state, tighten the setscrews so that the sandwiching means approach each other and sandwich the cutting tool, It is hooked irremovably in the take-out direction and firmly attached without rattling. As described above, according to this configuration, it is possible to attach a cutting tool of a type having a mounting hole or a cutting tool of a type having a mounting projection, and therefore, it is used for cutting work as in the past. It is not necessary to check the cutting tool mounting type of the cutting tool, and the cutting tool cannot be mounted because the cutting tool mounting type of the cutting tool is wrong. Therefore, the cutting operation cannot be performed. In addition, in the case of this configuration, since it is the most popular type from the viewpoint of simplicity and low cost, the present invention can be widely spread.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS.
It will be described based on. The first embodiment is an embodiment of the invention described in claim 2, and is an embodiment in which the invention described in claim 1 is applied to a blade mounting device of a type in which a blade is mounted by screwing a knob.

The cutting tool mounting apparatus 1 of this embodiment has a holding member 2 provided at the tip of a rod R (see FIG. 2) mounted on a reciprocating cutting tool body (not shown) and a periphery of the holding member 2. Knob 3 attached so as to cover it, and this knob 3
A pair of claws 4 and 5 held on the inner peripheral side of the claw so as to be able to approach or separate from each other, and a hairpin-shaped spring 6 for urging the claws 4 and 5 in a direction to separate them from each other. Has been done. It should be noted that the cutting tool main body does not require any change, and therefore the description thereof will be omitted. However, the cutting tool performs the cutting work by reciprocating the blade in the longitudinal direction thereof. Therefore, the rod R is a motor or the like. Is used as a driving source to reciprocate in the axial direction.

First, the holding member 2 has a shaft portion 2a, a flange portion 2b formed at the tip of the shaft portion 2a, and a pair of holding claw portions 2c, 2 formed at the tip of the flange portion 2b.
and c. The shaft portion 2a is coaxially connected to the tip of the rod, and the holding member 2 and thus the mounting device 1 are mounted on the cutting tool. A screw portion 2d is formed on the peripheral surface of the flange portion 2b, and a knob 3 to be described later is screwed in and mounted through the screw portion 2d. Both holding claws 2c, 2
The reference character c indicates that a circular truncated cone is formed on the front end surface of the flange portion 2b, and the central portion of the circular truncated cone is cut into a predetermined width to provide the holding claws 2c and 2c with a constant gap. Is formed so as to protrude along the axis of the shaft portion 2a, and mutually opposing surfaces are formed as parallel flat surfaces, and the rear surface (outer peripheral surface) thereof has a conical shape. The pair of claws 4 and 5 are held in the space 2e between the holding claws 2c. The space 2e is formed so as to penetrate into the flange 2b.
A slotted groove 2f having a narrow width and having a narrow width is formed at an appropriate depth in the center of the bottom surface of the. The head of the spring 6 is inserted into the slot 2f as described later. Further, inclined surfaces 2g, 2g are formed on both sides of the bottom surface (inner bases of the holding claws 2c, 2c).

Next, the knob 3 has a substantially cylindrical shape, and has a size into which the holding member 2 can be inserted on the inner peripheral side thereof. On the inner peripheral surface of the mouth of the knob 3, a screw portion 3a that can be screwed into the screw portion 2d of the holding member 2 is formed. As shown in FIG. 2, the inner surface from the middle to the tip of the knob 3 has a conical shape on the back surface of both the holding claws 2c, 2c and a conical shape on the back surface of the claws 4, 5 described below. On the other hand, it is formed into a mortar-shaped conical surface 3c. The front end surface is opened so that the front ends of both holding claws 4 and 5 can be projected and retracted. Further, on the outer peripheral surface of the knob 3, the protrusions 3b to 3d are provided to prevent slippage during rotation operation.
3b are radially formed at regular intervals in the circumferential direction.

Next, the pair of claws 4 and 5 are for holding by inserting a cutting tool (not shown) between them.
The claw 4 is shown in FIG. 3 and the claw 5 is shown in FIG. Both claws 4, 5
The rear surfaces 4a, 5a of the knobs 3 are also formed as conical surfaces that face the conical surface 3c of the knob 3. Further, both side surfaces 4b, 4b, 5b, 5b of the claws 4, 5 are formed into flat surfaces, and the claws 4, 5 are formed with a width that can be inserted between the holding claws 2c, 2c, respectively. There is. That is, the both holding claws 2c, 2c have a function of holding the pair of claws 4, 5 so that they can approach or separate in parallel with each other. Further, small holes 4c, 5c are formed in the rear surfaces of both the claws 4, 5 at substantially the same depth, and the ends of the hairpin-shaped spring 6 are inserted into the holes 4c, 5c, respectively. ing. Further, the corners between the side surfaces and the rear surface of both the claws 4, 5 are chamfered to be chamfered portions 4d, 4d, 5d, 5d, and the chamfered portions 4d, 5d are in contact with the inclined surfaces 2g, 2g. Both claws 4 and 5 are held between the holding claws 2c and 2c.

Next, the claw 4 functions at the time of attaching the "hole type" cutting tool B1. As shown in FIG. 3, a predetermined space is provided on the front surface (the surface facing the claw 5). Two large and small cylindrical projections 4e and 4f are formed along the axial direction of the shaft portion 2a. Both of the columnar projections 4e and 4f are formed with a thickness (height) slightly smaller than the plate thickness of the attached cutting tool B1. By inserting the both cylindrical projections 4e and 4f into the holes a and b (see FIG. 10) of the cutting tool B1, the cutting tool B1 is hooked along the axis of the rod R so that it cannot be pulled out. The tip-side halves (half on the lower side in the drawing) of the two cylindrical projections 4e and 4f are inclined surfaces 4e 'and 4f' which incline downward toward the tips (downward in the drawing). Since the tip of the cutting tool B on the insertion side is guided during insertion between the cutting tool 4 and the cutting tool 5, the insertion operation and the mounting work of the cutting tool B are facilitated.

On the other hand, the claw 5 functions at the time of attaching the "protrusion type" cutting tool B2, and as shown in FIG. 4, projections of ridges are provided at the four corners of the front surface (the surface facing the claw 4). 5
e, 5e, 5f, 5f are formed. Between the projections 5f, 5f on the insertion opening base side (lower side in the drawing) and the projections 5e, 5e on the insertion back side (upper side in the drawing), recessed portions 5g, 5g are provided with a constant space therebetween. Both of these recesses 5g,
Both projections c, c of a projection type cutting tool B2 are fitted into 5g so that the cutting tool B2 cannot be removed. In addition,
The tip corners on the insertion side of the projections 5e, 5e, 5f, 5f are also chamfered to form inclined surfaces 5e ', 5f', which also allows the cutting tool B to be inserted at the same time as the cylindrical projections 4e, 4f.
Is smoothly guided between both claws 4, 5.

The claws 4 and 5 thus formed are inserted between the holding claws 2c and 2c of the holding member 2 in a state of facing each other, and at this time, into the holes 4c and 5c of the claws 4 and 5. The ends of the springs 6 are inserted, and the heads of the springs 6 are inserted into the slots 2f of the holding member 2. Then, the knob 3 is attached via the screw portions 3c and 2d in a state where the holding member 2 holding the both pawls 4 and 5 in this way is inserted into the inner peripheral side, and the blade attaching device 1 is assembled. ing. In this assembled state, chamfers 4d and 5d are formed on both the claws 4 and 5, and inclined surfaces 2g and 2g are formed on the holding member 2 corresponding to the chamfers 4d and 5d. Therefore, the two pawls 4 and 5 are guided so that the center in the width direction thereof coincides with the center of the holding member 2 (the center of the rod R) when the pawls 4 and 5 are inserted between the holding pawls 2c, 2c, and they are mutually guided in a guided state. Since it is moved toward or away from, it is movably held without being displaced in its width direction.

According to the cutting tool attaching apparatus 1 thus constructed, the knob 3 has the threaded portion 3a and the threaded portion 2 on the holding member 2 side.
Since it is attached by being screwed into d, when the knob 3 is rotated, the knob 3 moves in the axial direction with respect to the holding portion 2. That is, when the knob 3 is rotated in the tightening direction, the knob 3 moves axially rearward (a direction in which the both pawls 4 and 5 are relatively moved to the inner part), so that the both pawls 4 and 5 are placed on the rear surface 4a of both. , 5a and the conical surface 3c of the knob 3 are pressed against each other against the spring 6 by the sliding contact action, so that the blade tool B inserted between the two is closed. The closed state of both the claws 4 and 5 is shown in FIG.

On the contrary, when the knob 3 is rotated in the loosening direction, the knob 3 is moved forward in the axial direction, so that the conical surface 3c of the knob 3 is moved in a direction away from the rear surfaces 4a, 5a of the pawls 4, 5. Therefore, the pawls 4 and 5 move in a direction in which they are moved away from each other by the urging force of the spring 6, whereby the cutting tool B inserted between the pawls 4 and 5 can be removed from the cutting tool attaching device 1.

According to the cutting tool attaching apparatus 1 of the present embodiment configured as described above, even a "hole type" cutting tool B1 is a "protrusion type" cutting tool B2, and the cutting tool can be mounted regardless of the mounting type. It can be installed in a predetermined state. That is, the knob 3 is rotated in the direction of loosening, and a sufficient gap is inserted between the claws 4 and 5 for inserting the cutting tool B. If a "hole type" cutting tool B1 is to be attached, the cutting tool B1 is inserted between the claws 4 and 5, and then the cylindrical projections 4e and 4f are fitted into the large and small holes a and b, respectively. The insertion tip portion of is pressed against the front surface of the nail 4. If the knob 3 is rotated in the tightening direction and both the claws 4 and 5 are closed while maintaining this pressing state, the cutting tool B1 is sandwiched between the claws 4 and 5, and the mounting operation of the cutting tool B1 is completed. . In this mounted state, the blade B1 cannot be removed because the cylindrical projections 4e, 4f of the claw 4 are fitted in the large and small holes a, b, and the cylindrical projections 4e, 4f are mounted. Since it does not protrude from the cutting tool B1, the claw 5 is directly brought into contact with the cutting tool B1 and the cutting tool B1 is pressed in the plate thickness direction thereof, and thus is firmly attached in the plate thickness direction and the width direction as well.

On the other hand, if a "protrusion type" cutting tool B2 is to be attached, the cutting tool B2 is inserted between the claws 4 and 5, and then the projections c and c are inserted into the concave portions 5g and 5g of the claw 5, respectively. In this state, the insertion tip of the cutting tool B2 is pressed against the front surface of the claw 5. And while holding this pressed state,
If the knob 3 is rotated in the tightening direction and both the claws 4 and 5 are closed, the cutting tool B2 is moved to the claws 4 and 5 in the same manner as the cutting tool B1.
It is sandwiched between 5 pieces, and the installation operation of the cutting tool B2 is completed. In this attached state, the blade tool B2 has its both projections c, c inserted into the concave portions 5g of the claws 5 and the projections 5 on the tip side.
Since it is in a state of being hooked on f, 5f, the cutting tool B2 cannot be removed, and the cylindrical projections 4e, 4 of the claw 4 are
Since f is directly abutted, the cutting tool B2 is pressed against the claw 4 side, and thus is firmly fixed in the plate thickness direction and the width direction without backlash.

As described above, according to the cutting tool attaching apparatus 1 of the present embodiment, whether it is the "hole type" cutting tool B1 or the "protrusion type" cutting tool B2, the cutting tool mounting device 1 does not require any replacement of members. Since you can also attach the cutting tool, you do not have to bother to prepare the cutting tool after checking the mounting type of the cutting tool as in the past, and you will not be able to use the cutting tool because you made the wrong mounting type. Since the cutting work can be performed by using the two types of mounting tools B1 and B2 in combination, a very convenient mounting device 1 (cutting tool) can be obtained.

Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment is an embodiment of the invention according to claim 2, and the invention according to claim 1 is provided with about 9 knobs.
This is an embodiment in the case of being applied to a cutting tool mounting device of a type in which opening and closing of claws, that is, mounting or dismounting of cutting tool can be performed with one touch only by rotating it by 0 °.

As shown in FIG. 5, the attachment device 10 of this embodiment is attached so as to cover the holding member 13 attached to the rod R of the cutting tool body (not shown) and the periphery of the holding member 13. The knob 16, a pair of claws 17 and 18 held on the inner peripheral side of the knob 16 so as to be able to approach or separate from each other, and a twist for urging the claws 17 and 18 in a direction of approaching each other. It is composed of a coil spring 15. In this example as well, the cutting tool main body does not need to be changed, and therefore its explanation is omitted.

The holding member 13 includes a shaft portion 13d, flange portions 13a and 13a formed in parallel with each other in the axial direction at a tip end of the shaft portion 13d at a constant interval, and a flange portion 13a on the tip end side. A pair of holding claws 13b, 13 which are provided on the front end surface so as to project forward from each other at predetermined intervals.
b (refer to diagram (b)). The shaft portion 13d is coaxially fixed to the tip of the rod R, and the holding member 13 and thus the mounting device 10 are mounted on the cutting tool. A torsion coil spring 15 is mounted between the flanges 13a, 13a, one end of which is inserted and fixed to the holding member 13 side, and the other end of which is inserted and fixed to the inner peripheral surface of the knob 16.

In addition, an escape hole 13e for inserting the head portion of the attached cutting tool B is formed in the holding member 13 at a predetermined depth along the axial center from the center of the tip end of the escape hole 13e. A compression coil spring 13f is inserted in the inner part. The compression coil spring 13f is for compressing between the head of the cutting tool B and the bottom of the escape hole 13e when the cutting tool is attached, and biases the cutting tool B in the pushing direction. While holding down, cutting tool B
It is provided to facilitate the removal of the fragments from the escape hole 13e when the is broken.

The holding claws 13b and 13b are the holding members 1
3 are provided so as to be centered on each other and their opposing surfaces are flat and parallel to each other. A pair of claws 17 and 18 are supported between the holding claws 13b and 13b so that they can approach or separate from each other, that is, can be opened and closed.

One of the pair of claws 17, 18 is one claw 1.
7 functions when the "hole type" cutting tool B1 is attached like the claw 4 in the first embodiment. As shown in FIG. 6, the front surface (the surface facing the claw 18) 17c is Two large and small columnar protrusions 17a and 17b are formed at a predetermined interval above and below the figure. Both cylindrical protrusions 17a,
17b is a cutting tool B1 to be attached, as in the first embodiment.
Is formed to have a thickness (height) slightly smaller than the plate thickness of the blade B1 and is inserted into the holes a and b (see FIG. 10) of the blade B1 so that the blade B1 is moved along the axis of the rod R. It is caught in a way that cannot be pulled out. Also in this example, the tip-side halves (lower half in the figure) of both cylindrical projections 17a, 17b are inclined surfaces 17a ', which are inclined downward toward the tip (downward in the figure).
17b 'is the same. Further, a guide protrusion 17d forming a cylindrical body is integrally formed on the rear surface side of the claw 17 so as to protrude downward from the lower surface by a predetermined dimension.

On the other hand, the claw 18 is the claw 5 in the first embodiment.
Similar to the above, it functions when attaching the "protrusion type" cutting tool B2, and as shown in FIG. 7, projections 18a, 18a, 18b, 18b of protrusions are formed at four corners of the front surface 18c. Both protrusions 18a, 1 on the insertion opening base side (lower side in the drawing)
8a and both projections 18b, 18b on the insertion back side (upper side in the drawing)
Recesses 18e and 18e are provided at a constant interval between the two, and both the recesses 18e and 18e are fitted with the two protrusions c and c of the protrusion type blade tool B2.
2 cannot be removed. In addition, each protrusion 18a,
It is also the same as the first embodiment in that the corners of the insertion side of 18a, 18b, 18b are chamfered to guide the cutting tool B. Further, similarly to the above-mentioned claw 17, a guide projection 18d forming a columnar body is integrally formed on the rear surface side of this claw 18 in such a state that it projects downward from the lower surface by a predetermined dimension.

Both holding claw portions 1 of the holding member 13 are paired in a state in which the both claws 17 and 18 formed in this way face each other.
Inserted between 3b and 13b, both pawls 17 and 18 are held so that they can approach or separate from each other, and thus both pawls 17 and 18 are held.
The knob 16 is assembled in a state in which the holding member 13 in the state of holding is held on the inner peripheral side.

As shown in FIG. 5, the knob 16 has a substantially annular shape, and a rubber sheet 16g for slip prevention is wound around the outer peripheral surface thereof. A stepped portion 16 a is provided on the inner peripheral surface of the knob 16, and the stepped portion 16 a
A groove 16b is formed over the entire circumference on the upper side in the figure from a. The holding member 13 is inserted into the knob 16 from the upper side in the drawing, and the flange portion 13a on the tip side is attached to the stepped portion 1.
6a, and a retaining ring 19 is fitted into the groove 16b in this state, and the knob 16 is attached to the tip of the holding member 13 so as to be rotatable around the axis and immovable in the axial direction. In addition, since the torsion coil spring 15 is interposed between the holding member 13 and the knob 16 as described above, the knob 16 is rotationally biased in the counterclockwise direction in FIG. 5B (b). It is installed in a closed state.

On the bottom surface of the knob 16, a drawing (b) of FIG.
As shown in FIG. 6, a mounting slot 16e for inserting the cutting tool B and a guide groove 16f for guiding the movement of the claws 17, 18 are provided.
16f is formed. Although not shown, the mounting port 16e has a shape in which a groove having a width slightly larger than the plate thickness of the cutting tool B is cut from both sides of a circular hole having a diameter slightly larger than the width of the cutting tool B. The guide grooves 16f, 16f are formed in a width that allows the guide protrusions 17d, 18d of the claws 17, 18 to be inserted, and are formed point-symmetrically with respect to the axis of the knob 16, and the guide grooves 16f, 16f are It is formed in a state in which it gradually expands outward in a spiral shape in the range of about 90 ° in the counterclockwise direction. Both guide grooves 16 formed in this way
Both claws 17 and 18 are incorporated into the f and 16f with the guide protrusions 17d and 18d inserted therein.

According to the above-mentioned structure, when the knob 16 is rotated about 90 ° in the clockwise direction in the division (b) against the torsion coil spring 15, both guide protrusions 17d and 18d are formed.
Move relative to each other in the guide groove 16f toward the spreading direction, so that the pawls 17 and 18 are forcibly separated from each other, whereby the mounting opening 16e is opened and the cutting tool B is placed between the pawls 17 and 18. Can be inserted. If a "hole type" cutting tool B1 is to be attached, the cutting tool B1 is passed through the mounting port 16e and the two nails 1
After being inserted between 7 and 18, it is pressed against the claw 17 side so that the cylindrical projections 17a and 17b are fitted in both holes a and b. Then, when the finger is released from the knob 16, the knob 16 is rotated counterclockwise in the drawing by the urging force of the torsion coil spring 15, so that both the claws 17 and 18 come close to each other and sandwich the cutting tool B1 therebetween. Then, similarly to the first embodiment, through the holes a and b, the cylindrical projections 17a and 1a are formed.
7b is hooked and firmly attached in a state where it cannot be removed.

On the other hand, if a "protrusion type" cutting tool B2 is to be attached, the cutting tool B2 is inserted through the mounting opening 16e in the same manner as described above, and then the cutting tool B2 is pressed against the claw 18 side to provide both projections c. , C are inserted into the recesses 18e, 18e, and then the finger is released from the knob 16 and returned in the counterclockwise direction in the drawing, the cutting tool B2 is sandwiched between the two claws 17, 18, and thus the cutting tool B2 is also cut. Similar to the first embodiment, both the projections c, c are hooked on the projections 18b, 18b on the lower side of the claw 18 and firmly attached in a state in which they cannot be removed.

As described above, the mounting device 10 of this example
According to the present invention, either the "hole type" or the "projection type" can be attached with one touch, so that the conventional inconvenience is eliminated as in the first embodiment, and the convenient and convenient attaching device 10 is further provided. It can be a reciprocating cutting device.

Next, a third embodiment of the present invention will be described with reference to FIGS. 8 and 9. The third embodiment is an embodiment according to the invention described in claim 3, and is an embodiment in which the invention described in claim 1 is applied to a conventionally known screw-fixing type blade mounting device. Similarly, the cutting tool body does not need to be changed.

The mounting device 20 of this embodiment has a stepped portion 21 formed at the tip of the rod R of the cutting tool body, and a cylindrical body fixed with the stepped portion 21 housed inside. 22 and a set screw 23 for fixing the tubular body 22 to the stepped portion 21. The stepped portion 21 corresponds to the other sandwiching means described in claim 3, and the tip portion of the rod R is formed by omitting a semicircle within a range of an appropriate length in the axial direction to form the rod. It has a flat surface 21a passing through the center of R. As well shown in FIG. 9 (b), the flat surface 21a is provided on both sides with protrusions similar to the claw 5 of the first embodiment and the claw 18 of the second embodiment. Protrusions 21c, 21c, 21d, 2
1d is formed, and is a "projection type" between the projections 21d, 21d on the tip side and the projections 21c, 21c near the base.
Recess 21 for inserting both projections c of the cutting tool B2
e, 21e are provided. In addition, this flat surface 21a
A hole 21b having a predetermined diameter is formed at a predetermined depth on the circumferential surface of the stepped portion 21 on the opposite side to the middle of the stepped portion 21 in the longitudinal direction. Although not shown in the drawings, in the case of this example, the protrusions 21c, 21c, 21 are also similar to those in the first and second embodiments.
The tip corners of d and 21d are chamfered so that the cutting tool B can be smoothly inserted.

Next, the cylindrical body 22 is a substantially cylindrical body having a length capable of accommodating the stepped portion 21 on the inner peripheral side thereof.
It has a flat portion 22a facing the one flat surface 21a. This flat portion 22a corresponds to one of the sandwiching means described in the claims. On the inner peripheral surface of the flat portion 22a (the surface facing the flat surface 21a), the claws 4 and the second embodiment of the first embodiment are often shown as well shown in FIG. 9 (a). 2 large and small cylindrical protrusions 22b, 22
c is formed so as to project on the axis of the rod R at a predetermined interval. Both of these cylindrical projections 22b and 22c are also formed with a thickness (height) slightly smaller than the plate thickness of the cutting tool B to which the cylindrical projections 4e, 4f, 17a and 17b are attached, and the cutting tool insertion side. A semicircle is formed on the inclined surface so that the inserted cutting tool B can be guided.
On the peripheral surface on the side opposite to the flat portion 22a formed in this way, screw holes 22 corresponding to the holes 21b of the stepped portion 21 are formed.
d is formed. Set screw 23 in this screw hole 22d
Is screwed in.

The tip of the set screw 23 is a slightly small diameter pin portion 23a having no thread formed therein, and the pin portion 23a is rotatably inserted into the hole 21b of the stepped portion 21.

The mounting device 2 of the present example configured as described above
According to 0, if the set screw 23 is tightened, the flat surface 21a of the stepped portion 21 and the flat portion 22a of the tubular body 22 are brought close to each other, and the cutting tool B can be sandwiched between the two 21a and 22a. When loosened, the two tools 21a, 22a move away from each other, so that the cutting tool B can be inserted or removed. If the "hole type" cutting tool B1 is to be attached, the insertion side head is pressed against the flat portion 22a of the tubular body 22,
By inserting both columnar projections 22b and 22c into the holes a and b and tightening the set screw 23 while maintaining this state, the cutting tool B1 can be firmly attached without being loosened and without rattling. On the other hand, if a "projection type" cutting tool B2 is to be attached, the insertion side head is pressed against the flat surface 21a of the stepped portion 21 and both projections c, c are fitted into the recesses 21e, 21e. If the setscrew 23 is tightened while maintaining the state, it can be firmly attached without being loosened and rattling like the above.

From this fact, the mounting device 20 of this embodiment can also be used for the "hole type" cutting tool B1 or the "projection type".
Since any of the cutting tools B2 can be attached, the conventional inconvenience is eliminated, and the attaching device 20 and the cutting tool can be easily used.

[0044]

According to the inventions of claims 1 to 3,
Since it can be attached to both a cutting tool with a hole for mounting and a cutting tool with a protrusion for mounting, bother to check the cutting tool mounting type of the cutting tool used for cutting work as before. It is not necessary, and the cutting tool cannot be attached because the cutting tool mounting type of the cutting tool is wrong. Therefore, the cutting operation cannot be performed.

According to the second aspect of the present invention, the above-mentioned effect can be obtained in addition to the convenient function of opening and closing the claws and attaching the cutting tool by simply rotating the knob without using a tool such as a screwdriver. Therefore, the usability of the cutting tool attaching device and thus the reciprocating cutting tool is further improved.

According to the third aspect of the invention, the above-mentioned two types of blade tools can be mounted by applying to a screw-fastening type blade tool mounting device that has been most commonly used in the past in terms of simplicity and low cost. It is possible to widely disseminate the cutting tool attachment device having a possible convenient function and thus the reciprocating cutting tool.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a mounting device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the mounting device of the first embodiment as well.
(a) is a vertical sectional view, (b) is a vertical sectional view orthogonal to (a), and (c) is a bottom view.

FIG. 3 is a view showing a claw for hooking a “hole type” cutting tool in the attachment device of the first embodiment, FIG. 3A is a side view, and FIG. 3B is a front view.

FIG. 4 is a view showing a claw for hooking a “projection type” cutting tool in the mounting apparatus of the first embodiment, FIG. 4 (a) is a front view, and FIG. 4 (b) is a side view.

5A and 5B show a mounting device according to a second embodiment, in which FIG. 5A is a vertical sectional view and FIG. 5B is a horizontal sectional view.

[Fig. 6] "Hole type" in the mounting device of the second embodiment
Shows the claw for hooking the blade tool of Fig. (A) is a front view,
Diagram (b) is a side view and diagram (c) is a perspective view.

7A and 7B show claws for hooking a "protrusion type" cutting tool in the attachment device of the second embodiment, where FIG. 7A is a front view, FIG. 7B is a side view, and FIG. Is a perspective view.

8A and 8B show a mounting device according to a third embodiment, in which FIG. 8A is a longitudinal sectional view and FIG. 8B is a lateral sectional view.

9A and 9B show constituent members of a mounting device according to a third embodiment, FIG. 9A is a vertical cross-sectional view of a cylindrical body, and FIG. 9B is a front view of a stepped portion.

FIG. 10 shows a cutting tool, where FIG. 10A is a front view of a “hole type” cutting tool, and FIG. 10B is a front view of a “projection type” cutting tool.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Attachment device of 1st Example 2 ... Holding member, 3 ... Knob 4 ... Claw (for "hole type"), 4e, 4f ... Cylindrical projection 5 ... Claw (for "projection type"), 5g ... Recess 10 ... Attachment device of the second embodiment 13 ... Retaining member, 16 ... Knob 17 ... Claw (for "hole type"), 17a, 17b ... Cylindrical projection 18 ... Claw (for "projection type"), 18e ... Recess 20 ... Third Mounting device of the embodiment 21 ... Stepped portion, 21e ... Recessed portion 22 ... Cylindrical body, 22a ... Flat portion, 22b, 22c ... Cylindrical protrusion 23 ... Set screw B1 ... "Hole type" cutting tool, a, b ... Hole B2 ... "Protrusion type" cutting tool, c ... Protrusion

Claims (3)

[Claims] 1. A mounting device for mounting a cutting tool to a reciprocating cutting tool, characterized in that it can be mounted on either a cutting tool having a mounting hole or a cutting tool having a mounting projection. A tool attachment device for reciprocating cutting tools. 2. A blade tool mounting device having a pair of claws mounted so as to be able to approach or separate from each other so as to sandwich the blade tool, wherein the facing surface of one claw has a mounting hole. Providing a projection that is inserted into the hole to hook the cutting tool in the removal direction so that it cannot be removed, and insert the projection of the cutting tool that has a mounting projection on the facing surface of the other claw to remove it in the removal direction. 2. The cutting tool mounting device for a reciprocating cutting tool according to claim 1, wherein a recess is provided so that the tool can be hooked immovably. 3. A blade tool attaching device having a pair of pinching means capable of pinching a blade tool by tightening a set screw, wherein one of the pinching means is inserted into the hole of a blade tool having a hole for attachment. Providing a projection for catching the cutting tool in the removal direction in an unmovable manner, and inserting the projection of a cutting tool having a mounting projection in the opposite surface of the other claw for catching in the removal direction in the unremovable direction The cutting tool attachment device for a reciprocating cutting tool according to claim 1, wherein the device is provided with a recess.