JP2011036937A - Blade mounting device of reciprocating cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a mounting base end with a large width floats to make a mounting state unstable since a mounting groove for a small width is formed along a bottom of a conventional mounting groove for a large width, and stabilize the mounting state by being sandwiched by more grounding areas about a blade with a large width relating to the mounting groove for regulating a width for enabling mounting of the blade for a large width and a blade for a small width in a blade mounting device interposing and fixing the mounting base end of the blade between a blade mounting base of an output rod and a holder in a reciprocating cutting tool such as a reciprocating saw. <P>SOLUTION: In the blade mounting device, the mounting groove 19 for a large width and the mounting groove for a small width are arranged in the holder 17 in a mutually crossed state. The mounting base 11a mounts the holder 17 by changing the direction of it by 90&deg; with the blade 11 with a large width and the blade with a small width, so that a range where the mounting base end 11a with a large width is floated at the mounting groove for a small width is reduced. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention is a hand-held tool called a jigsaw used for, for example, a reciprocating saw for cutting a pipe material or a cutting material for a plate material, and is a reciprocating cutting tool for performing a cutting process by reciprocating a cutting tool in its longitudinal direction The present invention relates to an apparatus for attaching the cutting tool to the machine.

In this type of reciprocating cutting tool, the output rod reciprocated by a drive source such as a built-in electric motor is used to hold the attachment base end of the blade using a holder or the like, thereby attaching the blade to the output rod. I have. In general, a configuration is adopted in which an attachment base end portion of a cutting tool is sandwiched between an output rod and a holder, and attached mainly in the thickness direction and the width direction without rattling. In many cases, the output rod or the holder is provided with a mounting groove portion that fits the mounting base end portion of the cutting tool and restricts rattling in the width direction, and the mounting base end portion of the cutting tool is fitted into this mounting groove portion. In this state, the blade is fixed in the thickness direction and the width direction without shaking by fixing the holder to the output rod in a state where the backlash in the width direction is restricted. Such techniques are disclosed in, for example, the following Patent Documents 1 and 2.
The blade attachment device described in Patent Document 1 has a configuration in which an attachment groove portion for a small width is provided on the output rod side, and a large attachment groove portion is provided on the holder side in parallel (along the same direction). Yes.
There are also various types of fixing structures (fixing prevention) in the reciprocating direction of the cutting tool with respect to the output rod, and the fixing structure of the attachment base end portion. For example, a protrusion that protrudes in a cruciform shape on both sides of the mounting base end and is prevented from coming off by hooking it on the output rod side, or on the output rod side in the engagement hole provided on the mounting base end The one of the form which fits the engagement pin provided in and prevents it from coming off is used. Such techniques are disclosed in Patent Documents 3 and 4 below.
Accordingly, in accordance with these various attachment forms on the tool side, various attachment forms such as those having hooking projections on the base end portion of the cutting tool or engaging holes for fitting pins are provided. Has been. In addition, as for the cutting tool, various sizes of the length, width, or thickness are provided in accordance with the work purpose.
Furthermore, reciprocating saws that are usually held with both hands are generally larger than jigsaws that are usually placed on a plate and moved with one hand. Various contrivances have been made with respect to the cutting tool mounting portion to make it possible to attach to a small reciprocating saw (jigsaw blade specification).

Japanese Utility Model Publication No. 5-80624 Utility Model Registration No. 2595562 Japanese Patent No. 3411368 Japanese Patent No. 3494721

However, the conventional blade attachment device has the following problems. As described above, in the blade attachment device disclosed in Patent Document 1, the holder and the output rod have a mounting groove portion for substantial use (for a blade having a large attachment base end portion) corresponding to the attachment base end portion having a different width. And a mounting groove for a small width (for a blade having a small mounting base end).
Apart from this, for example, as shown in FIG. 17, there are provided two mounting groove portions 31 and 32 having different widths W1 and W2 on the holder 30 side. In this case, the mounting groove 32 for the small width W2 is further provided in a stepped shape along the center of the bottom of the mounting groove 31 for the large W1. Positioning legs 30a, 30a are provided on the sides of the holder 30, and the mounting base 35 of the output rod is fitted between the legs 30a, 30a without rattling, so that the attached cutting tool Positioning in the width direction with respect to the output rod is performed.
As described above, in the configuration in which the two attachment groove portions 31 and 32 having the widths W1 and W2 are provided in a stepped shape corresponding to the width dimension of the attachment base end portion of the cutting tool, the two attachment groove portions 31 and 32 are aligned at the center. If the width dimensions W1 and W2 of the mounting groove portions 31 and 32 are not greatly different from each other, the mounting base end portions 33 of the cutting tool fitted into the large mounting groove portion 31 are located on both sides thereof. Only a slight width (W1-W2) is sandwiched between the mounting base 35 and the holder 30, and the central portion (range of W2) is floated by the small mounting groove 32 (not sandwiched). ), And there was a problem that the mounting state became unstable.
SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems, and in a blade attachment device configured to fix the blade by sandwiching the attachment base end portion between the output rod and the holder, a large attachment state of the blade is conventionally obtained. It aims to be more stable.

For this reason, this invention was set as the blade tool attachment apparatus described in each claim of a claim.
According to the blade attachment device of claim 1, the attachment groove portion for large use and the attachment groove portion for small width are not provided in a stepped shape along the same direction as in the prior art, but intersect each other. It is provided along different orientations. For this reason, since the central part of the substantial attachment base end part does not become a state that is floated by the attachment groove part 32 for the small width over the entire length, the sandwiched area is expanded more than before and greatly increased in a more stable state. Can be attached.
According to the blade attachment device of claim 2, since the large attachment groove and the small attachment groove are provided in the holder in a state orthogonal to each other, the large blade is replaced with the small blade or vice versa. In this case, an arbitrary cutting tool can be attached along the reciprocating direction of the output rod by changing 90 degrees between the vertical and horizontal orientations of the holder and fixing the holder to the output rod. In this case, the mounting base end housed in the large mounting groove portion is grounded to the bottom of the large mounting groove portion except for the portion where the large mounting groove portion intersects the small mounting groove portion. It can be attached to the state.
According to the blade attachment apparatus of claim 3, the attachment base end portion of the blade is sandwiched between the holder and the output rod, and is fixed in the removal direction in addition to the width direction and the thickness direction (plate thickness direction). It is attached in the state.
According to the blade attachment device of the fourth aspect, the attachment base end portion of the blade is sandwiched between the holder and the output rod and fixed in the width direction and the thickness direction, and the engagement pin on the holder side is engaged. It is inserted into the joint hole and fixed so that it cannot be removed.

1 is an overall side view of a reciprocating saw provided with a blade attachment device according to an embodiment of the present invention. This figure has shown the state which attached the 1st type blade. It is a side view of three different types of blades. The upper stage shows a first type of cutting tool, the middle stage shows a second type of cutting tool, and the lower stage shows a third type of cutting tool. It is a side view of the blade attachment apparatus which concerns on this embodiment. This figure has shown the state which attached the 1st type blade. It is a top view of the blade attachment device concerning this embodiment. This figure is a view taken in the direction of arrow (IV) in FIG. It is a side view of a single output rod. It is a top view of an output rod simple substance. This figure is a view taken in the direction of arrow (VI) in FIG. It is a side view of a holder simple substance. It is a top view of a holder simple substance. This figure is a view taken in the direction of arrow (VIII) in FIG. It is a right view of a holder simple substance. This figure is a view taken in the direction of arrow (IX) in FIG. It is an inner surface figure of a holder simple substance. This figure is a view taken in the direction of arrow (X) in FIG. It is a side view of a blade attachment apparatus. This figure has shown the state which attached the holder vertically. This figure has shown the state which attached the 1st type blade. It is the (XII)-(XII) arrow directional view of FIG. 11, Comprising: It is the figure which looked at the blade attachment device from the blade side. It is a side view of a blade attachment apparatus. This figure has shown the attachment state of the holder sideways. This figure has shown the state which attached the 2nd type blade. It is the (XIV)-(XIV) arrow directional view of FIG. 13, Comprising: It is the figure which looked at the blade attachment device from the blade side. It is a side view of a blade attachment apparatus. This figure has shown the state which attached the holder sideways. This figure has shown the state which attached the 3rd type blade. FIG. 15 is a view taken along the line (XVI)-(XVI) in FIG. 15, and is a view of the blade attachment device viewed from the blade side. It is the figure which looked at the conventional blade attachment device from the blade side.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a reciprocating cutting tool 1 provided with a blade attachment device 10 according to this embodiment described below. In this embodiment, a so-called reciprocating saw is illustrated as the reciprocating cutting tool 1. This reciprocating cutting tool 1 is a hand-held cutting tool used by a user with both hands, and includes a main body 2 incorporating an electric motor 5 (only the output shaft is visible in FIG. 1) as a driving source. The handle portion 3 at the rear of the main body 2 and the reciprocating mechanism 4 at the front of the main body 2 are provided. For example, the user holds the handle portion 3 with the right hand and supports the reciprocating mechanism portion 4 with the left hand to perform the cutting process. The rotational output of the electric motor 5 is converted into the reciprocating motion of the output rod 6 by the reciprocating mechanism 4. A blade attachment device 10 is provided at the tip of the output rod 6. This blade attachment device 10 has a configuration in which three different types of blades 11, 12, 13 can be arbitrarily selected and attached. The present embodiment is characterized by the blade attachment device 10, and the basic configuration of the reciprocating cutting tool 1 is the same as that conventionally known, and details are not particularly required in the present embodiment. The detailed explanation is omitted.
FIG. 2 shows three types of blades 11, 12, and 13 that can be attached by the blade attachment device 10 of the present embodiment. The first type cutting tool 11 in the upper stage in the figure is mainly used in a reciprocating saw conventionally, and an engagement hole 11b and an engagement recess 11c are provided in the attachment base end portion 11a. In the drawing, the second-type cutting tool 12 at the middle stage and the third-type cutting tool 13 at the lower stage are both used mainly for jigsaws, and are smaller than the first-type cutting tool 11. Engagement projections 12b and 12b are provided on the attachment base end 12a of the second-type blade 12 in the middle stage so as to project to the left and right sides. Two small and large engagement holes 13b and 13c are provided in the attachment base end portion 13a of the lower third type blade 13. Not only the first type, but also small second-type and third-type blades 12 and 13 that have been mainly used for jigsaws in the past can be attached to the blade attachment device 10 described below.
Further, the width dimension D1 (large) of the attachment base end portion 11a of the upper first type blade 11 is larger than the width dimension D2 (small width) between the left and right engaging projections 12b, 12b of the second type blade 12. The width dimension is set to be larger than the width dimension D3 (small width) of the attachment base end portion 13a of the third type blade 13. Further, the width dimension D2 between the left and right engaging convex portions 12b, 12b of the second type cutting tool 12 and the width dimension D3 of the attachment base end portion 13a of the third type cutting tool 13 are set to the same width dimension. These three types of blades 11, 12, 13 themselves are not particularly required to be changed in the present embodiment, and can be used as they are in the conventional configuration.

3 and 4 show details of the blade attachment device 10 of the present embodiment. The blade attachment device 10 includes an attachment base 15 provided at the tip of the output rod 6 and a holder 17 that is fixed to the attachment base 15 by a fixing screw 20.
5 and 6 show the output rod 6 and the mounting base portion 15 as a single unit. A flat mounting seat surface 15a is formed on the mounting base portion 15 by two-sided width processing. The mounting seat surface 15a is provided with three screw holes 15b, 15c and 15d and two circular relief holes 15e and 15f. The three screw holes 15b, 15c, and 15d all have the same screw diameter. The two escape holes 15e and 15f are formed with the same diameter and depth.
7 to 10 show the holder 17 alone. The holder 17 includes a base portion 18 having a substantially rectangular shape, and leg portions 19 a, 19 b, 19 c, 19 d provided at the four corners of the base portion 18. One of the four side portions of the base portion 18 is formed in an arc shape. Hereinafter, this arc-shaped side portion is referred to as an arc-shaped side portion 18S and is distinguished from other linear side portions. Further, among the other side portions of the linear shape, the side portion located on the left side of the arc-shaped side portion 18S in FIG. 7 is particularly referred to as a linear side portion 18L to be distinguished from the other linear side portions.
The base portion 18 is provided with three insertion holes 18a, 18b, and 18c. These three insertion holes 18a, 18b, and 18c all penetrate with the same diameter. Further, one engagement pin 18 d is attached to the base portion 18. As shown in FIG. 9, the engagement pin 18 d protrudes toward the inner surface side of the base portion 18.
The four leg portions 19 a, 19 b, 19 c, 19 d are all protruded from the inner surface side of the base portion 18. In FIG. 9, the side surface of the base portion 18 is visible, and in FIG. 7, the outer surface of the base portion 18 is visible. In FIG. 9, four leg portions 19a, 19b, 19c, and 19d protrude from the inner surface of the base portion 18 to the right side in the figure.

The distance between the leg portions 19a and 19b is set to A dimension. The distance between the leg portions 19c and 19d is also set to A dimension. This A dimension is set corresponding to the width dimension of the mounting base 15 of the output rod 6. Therefore, as shown in FIGS. 3 and 11, when the holder 17 is attached in a direction in which the linear side portion 18L of the base portion 18 is aligned with the tip portion 15g of the mounting base portion 15, the space between the leg portions 19a and 19b is obtained. The mounting base portion 15 is accommodated in the mounting groove portion 19 having a width A extending between the leg portions 19c and 19d without rattling in the width direction. The attachment base end portion 11a of the first type cutting tool 11 can be accommodated in the attachment groove portion 19 having the width dimension A without rattling in the width direction.
The distance between the leg portions 19b, 19c and the leg portions 19a, 19d are also set to A dimension. For this reason, as shown in FIGS. 13 and 15, when the holder 17 is attached in a direction in which the arc-shaped portion 18 </ b> S of the base portion 18 extends along the distal end portion 15 g of the mounting base portion 15, the space between the leg portions 19 a and 19 d is increased. The mounting base 15 of the output rod 6 can be accommodated between the legs 19b and 19c without rattling in the width direction.
As described above, the holder 17 of the present embodiment has the orientation shown in FIGS. 3 and 11 with respect to the mounting base portion 15 of the output rod 6 (the orientation in which the linear side portion 18L is along the tip portion 15g) and FIG. And the direction shown in FIG. 15 (the direction along the arc-shaped side portion 18S along the tip portion 15g) can be selected and attached. Hereinafter, with respect to the direction in which the holder 17 is attached to the mounting base portion 15, the former direction is referred to as a vertical direction, and the latter direction is referred to as a horizontal direction.

As shown in FIGS. 3 and 11, when the holder 17 is attached to the mounting base 15 in the vertical direction, the first type cutting tool 11 (the cutting tool having a large width D1 of the mounting base end 11 a) is attached to the output rod 6. be able to. In this vertical orientation, the space portion of the width dimension A spanning between the leg portions 19a and 19b and between the leg portions 19c and 19d leans the mounting base end portion 11a of the large cutting tool (first type cutting tool 11) in the width direction. A mounting groove portion 19 is formed for accommodating without any problem.
The first type blade 11 is fixed in a state in which the attachment base end portion 11 a is sandwiched between the attachment seat surface 15 a of the output rod 6 and the base portion 18 of the holder 17. Further, in this case, the engagement pin 18d is inserted into the escape hole 15e of the attachment base 15 through the engagement hole 11b of the attachment base end 11a, thereby the holder 17 of the attachment base end 11a. And the displacement in the opposite direction (attachment direction) are restricted. Furthermore, the deflection in the width direction and the displacement in the mounting direction of the blade 11 are also regulated by engaging the fixing screw 20 along the engaging recess 11c of the mounting base end portion 11a.
In this vertical orientation, the holder 17 can be fixed to the mounting base 15 by tightening the fixing screw 20 into the screw hole 15d of the mounting base 15 through the insertion hole 18c of the holder 17, whereby the first The type of blade 11 can be attached to the mounting base 15 of the output rod 6 without rattling in the width direction, the longitudinal direction and the thickness direction.

On the other hand, as shown in FIGS. 13 and 15, when the holder 17 is attached to the attachment base 15 in the horizontal direction, the arc-shaped side portion 18 </ b> S is in a state along the tip 15 g of the attachment base 15. Here, as shown in FIG. 10, on the inner surface of the base portion 18, the attachment base end portions 12a and 13a of the blades 12 and 13 for small width are provided across the leg portions 19a and 19d and between the leg portions 19b and 19c. A mounting groove 18e for fitting is provided. The mounting groove 18e is provided along the straight side portion 18L. The mounting groove 18e has a width corresponding to the width dimension D2 between the left and right engaging projections 12b, 12b of the second type cutting tool 12 and the width dimension D3 of the mounting base end part 13a of the third type cutting tool 13. The width B is about B and about half the width A. The small-width mounting groove 18e is formed with a depth smaller than the thickness of the second type blade 12 and the third type blade 13. An engagement groove portion 18f having a smaller width dimension is formed at the rear portion (upper portion in FIG. 10) of the attachment groove portion 18e. The engaging groove portion 18f has a width dimension C and is set to a width dimension slightly smaller than the width of the attachment base end portion 12a of the second type cutting tool 12.
As shown in FIGS. 13 and 14, the holder 17 is turned between the leg portions 19a and 19d and the leg portions 19b and 19c in a state where the holder 17 is turned 90 ° clockwise from the longitudinal direction shown in FIG. It is possible to attach the holder 17 by inserting the mounting base 15 into the space A having a width dimension A extending over the space. By attaching the holder 17 sideways with respect to the mounting base 15 in this way, the second type blade 12 can be attached to the output rod 6. In this case, the second type cutting tool 12 has the mounting base end 12a and the left and right engaging projections 12b and 12b fitted in the mounting groove 18e of the holder 17, and the mounting base end 12a is mounted on the mounting base. It is in a state of being sandwiched and attached between the portion 15 and the holder 17.

The holder 17 is fixed to the mounting base 15 by tightening the fixing screw 20 into the screw hole 15b through the insertion hole 18a. Moreover, when one engagement convex part 12b of the 2nd type blade 12 engages with the fixing screw 20, the displacement of the said blade 12 in the removal direction (left direction in FIG. 13) is controlled. Further, the pointed portion of the attachment base end portion 12a is engaged with the narrower engagement groove portion 18f, whereby the displacement in the attachment direction (right direction in FIG. 13) of the second type blade 12 is restricted. Has been. In this case, the engagement pin 18d of the holder 17 is simply inserted into the escape hole 15f of the mounting base portion 15 and does not function as a member that restricts the cutting tool 12 from coming off.
Further, as shown in FIGS. 15 and 16, the third type blade 13 can be attached to the output rod 6 by attaching the holder 17 sideways. Similar to the second type, the attachment base end portion 13a of the third type blade 13 is also fitted in the attachment groove portion 18e. Further, as shown in FIG. 16, the attachment groove 18e is formed with a depth slightly smaller than the thickness of the attachment base end 13a of the third type cutting tool 13. The attachment base end portion 13a is sandwiched between the attachment base portion 15 and the holder 17, and is fixed in a state where displacement in the width direction is restricted.
The fixing screw 20 is fastened to the screw hole 15 c through the insertion hole 18 b of the holder 17 and the engagement hole 13 b of the blade 13, and the holder 17 is fixed to the mounting base 15. Since the fixing screw 20 is inserted into the front engagement hole 13b, the displacement of the third type blade 13 in the longitudinal direction (the withdrawal direction and the attachment direction) is restricted. Further, the displacement in the mounting direction of the third type blade 13 is also restricted by the rear end portion of the mounting base end portion 13a being engaged with the engaging groove portion 18f.
In this case, the insertion holes 18 a and 18 c of the holder 17, the screw holes 15 b and 15 d of the mounting base 15, the escape hole 15 e, and the engagement hole 13 c on the rear side of the cutting tool 13 are not used. Also in this case, the engagement pin 18d of the holder 17 is simply inserted into the escape hole 15f of the mounting base portion 15 and does not function as a member that restricts the cutting tool 13 from coming off.

As described above, according to the blade attachment device 10 of this embodiment, the three types of blades with the attachment base end portion 11a (or 12a or 13a) sandwiched between the attachment base portion 15 of the output rod 6 and the holder 17 are provided. 11, 12, 13 can be attached.
In this embodiment, the width dimension D1 of the attachment base end portion 11a of the first type blade 11 is large (substantially), and the width dimension D2 between the left and right engaging convex portions 12b, 12b of the second type blade 12 and the third dimension. The width dimension D3 of the attachment base end portion 13a of the type blade 13 is smaller than this (small width). The holder 17 is fitted with the attachment base end portion 11a of the first type blade 11 to restrict the deflection in the width direction, the attachment base end portion 12a of the second type blade 12 and the left and right sides. The fitting groove portions 18e for fitting the engaging projections 12b, 12b or the fitting base end portion 13a of the third type blade 13 to restrict the deflection in the width direction are orthogonal to each other. Is provided.
For this reason, in the case where the first type blade 11 is attached and the case where the second or third type blades 12, 13 are attached, the orientation of the holder 17 is changed by 90 ° between the vertical direction and the horizontal direction, and the mounting base portion 15 is attached.
As described above, the mounting groove 19 for fitting the large mounting base end 11a and the mounting groove 18e for fitting the small mounting base end 12a, 13a are provided so as to be orthogonal to (intersect) each other. Accordingly, the bottom surface of the mounting groove portion 19 for substantial use can be secured with a sufficient area, and the range where the former mounting base end portion 11a is floated by the mounting groove portion 18e for small width is the intersection portion. Therefore, the range can be greatly reduced as compared with the conventional case. The mounting base end portion 11a can be fitted in a state where the mounting base end portion 11a is grounded to the bottom surface of the mounting groove portion 19 with a sufficient area without floating the entire width at the front portion and the rear portion excluding the intersection with the small width mounting groove portion 18e. Since it can do, the said 1st type blade 11 can be attached to the state more stable than before.
Moreover, since the large blade 11 and the small blades 12 and 13 can be attached in a stable state with respect to the width of the attachment base end, the blades 11 and 12 that can be attached to this type of reciprocating cutting machine. The 13 types can be diversified, and as a result, the small blades 12 and 13 conventionally used only for jigsaws can be applied to relatively small reciprocating saws.

Various modifications can be made to the embodiment described above. For example, although a reciprocating saw was illustrated as a reciprocating cutting tool, it can also be applied to a jig attachment device for a jigsaw.
Moreover, although it illustrated by the structure which can attach the 1st-3rd three types of blades 11-13 about the attachment form, when setting it as the structure which can be attached about 2 types of 1st and 2nd types of blades 11 and 12 Can apply. In this case, the screw hole 15c of the mounting base 15 and the insertion hole 18b of the holder 17 can be omitted.
The leg portions 19a, 19b, 19c, 19d of the holder 17 may be omitted. In this case, a mounting groove portion having the same width as the illustrated mounting groove portion 19 is provided on the inner surface of the base portion 18 with a depth smaller than the thickness of the mounting base end portion 11a, and a mounting groove portion 18e for a small width is formed so as to intersect with this. It can be set as the structure to provide.
Further, the base portion 18 of the holder 17 has a configuration in which one side portion is formed in an arc shape to form the arc-shaped side portion 18S, but may be all linear side portions (rectangles) or circular. It is good also as a base part.
Further, the configuration in which the engagement pin 18d as the engagement portion is provided on the base portion 18 of the holder 17 is illustrated. However, as the engagement portion, an engagement convex portion or an engagement claw portion is provided instead of the engagement pin 18d. It is good also as a structure.
In addition, the attachment base end portion of the cutting tool is exemplified as having a plurality of types of shapes, and the configuration in which a plurality of attachment groove portions are provided with respect to the width dimension among the plurality of types of shapes is exemplified. The present invention can also be applied to the case where the mounting groove portion is provided corresponding to the size or the other shape such as the presence or absence of the engagement convex portion 12b or the presence or absence of the engagement holes 13b and 13c.

1 ... Reciprocating cutting tool (Reciprocating saw)
DESCRIPTION OF SYMBOLS 2 ... Main-body part 3 ... Handle | steering-wheel part 4 ... Reciprocating mechanism part 5 ... Electric motor 6 ... Output rod 10 ... Cutting tool attachment apparatus 11 ... Cutting tool (1st type)
11a: Mounting base end, 11b: Engagement hole, 11c: Engaging recess D1: Width dimension 12 of mounting base end 11a: Cutting tool (second type)
12a ... Mounting base end, 12b ... Engagement projection D2 ... Width dimension between engagement projections 12b, 12b 13 ... Cutting tool (third type)
13a: Mounting base end, 13b: Engagement hole (front side), 13c: Engagement hole (rear side)
D3: Width dimension 15 of the mounting base end portion 13a ... Mounting base portion 15a ... Mounting seat surface, 15b, 15c, 15d ... Screw hole, 15e, 15f ... Relief hole 17 ... Holder 18 ... Base portion 18S ... Arc-shaped side portion , 18L ... straight side portions 18a, 18b, 18c ... insertion hole, 18d ... engagement pin 18e ... mounting groove (for small width)
18f ... engagement groove 19 ... mounting groove (for large use)
19a, 19b, 19c, 19d ... Leg 20 ... Fixing screw 30 ... Holder (conventional)
31 ... Mounting groove (for large W1)
32 ... Mounting groove (for small width W2)

Claims (4)

In a reciprocating cutting tool that performs cutting by reciprocating a cutting tool, an apparatus for attaching the cutting tool to an output rod that reciprocates,
A holder for fixing the attachment base end of the cutting tool in the plate thickness direction between the output pedestal and the attachment pedestal of the output rod;
The holder is provided with a plurality of types of attachment groove portions for accommodating the attachment base end portions of the cutting tools and restricting the position in the width direction of the attachment base end portions, and the attachment groove portions intersect each other. A blade attachment device that is provided and configured so that a plurality of types of blades can be arbitrarily selected and attached with respect to the shape of the attachment base end portion by changing the attachment direction of the holder. 2. The blade attachment device according to claim 1, wherein the holder includes a large attachment groove portion and a small attachment groove portion with respect to a width dimension of an attachment base end portion of the blade, and the attachment groove portions are mutually connected. A blade attachment device that is provided along a direction orthogonal to each other and that can be attached to the attachment base by changing the holder vertically and horizontally. 3. The blade attachment device according to claim 1, wherein the holder includes an engaging portion that engages with an attachment base end portion of the blade in a blade removal direction. 4. The blade attachment device according to claim 3, wherein the holder includes an engagement pin as the engagement portion, and the engagement pin is inserted into an engagement hole provided in an attachment base end portion of the blade. A blade attachment device configured to restrict displacement in the removal direction of the blade.

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