JP3094522U - Extension attachment - Google Patents

Abstract

(57) [Summary] Since the depth of a hole to be formed is determined by the length of a blade, cutting blades of various lengths must be prepared. A cutting blade (2) attached to a lower end of an attachment body (1) and an extension core (3) for holding the cutting blade (2) movably. The attachment main body 1 has an insertion hole 1a for attaching the cutting blade 2 on the lower end side, and a connecting portion 1b for fixing to the hand tool on the other end side. The extension core member 3 is inserted into through holes 1e and 2b formed in the axial direction of the attachment body 1 and the cutting blade 2, and forms a planar detent surface 3a for preventing rotation in the longitudinal direction. In addition, the cutting blade 2 is retained at the distal end side so as not to come off. Extension core material 3
The cutting blade 2 can be slidably displaced by loosening the fixing bolt 1d, and its length can be changed according to the depth of the hole to be drilled.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is mainly applied to replacement of rivets and drilling of steel plates in bridges, towers, buildings, etc. Extension attachment used for hand tools such as portable hole punches and drills that are ideal for drilling work For more details on the The length of the cutting blade can be changed as needed, for example, In addition, you can attach and detach the hand tool and the attachment body with one touch. It exists in a useful extended attachment.

[0002]

[Prior art]

  Conventionally, a cutting blade for making a circular hole in a hard metal plate, especially a hard plate, has a longer length The method is fixed, and it is detachably attached to the rotary shaft of the drilling tool (hand tool). It Such cutting blades can be attached and removed by fixing with a fixing bolt or by using a fixed spherical body. Therefore, a method of fixing with one touch has been proposed.

[0003]   Also, the method of attaching and detaching the punching blade is a one-touch method that uses a fixed sphere (ball). If so, a cutting blade corresponding to this is required. However, in general, drilling equipment such as drilling machines Can be used even when the installation (hand tool) adopts the attachment / detachment method using the old-style fixing bolt As you can see, the attachment / detachment section has been devised.

[Patent Document 1]             JP, 2002-1682, A

[0004]

[Problems to be solved by the device]

  However, the conventional cutting blade described above is formed by the length of the blade. Since the depth of the hole to be drilled is determined, it is necessary to prepare cutting blades of various lengths. It has a drawback.

[0005]   Also, various attachments have been proposed for extending the length of the cutting blade. , The connection between the attachment body and the drilling device (hand tool) is done by bolts. Therefore, there is a problem that the attaching / detaching operation is complicated.

[0006]   The present invention has been made in view of such conventional problems, and if necessary, cutting may be performed. The blade length can be changed and the hand tool and attachment can be attached and detached. With the aim of providing a useful extension attachment that can be performed with one touch It is a thing.

[0007]

[Means for Solving the Problems]

  In order to solve the conventional problems described above and achieve the intended purpose, the gist of the present invention is With the configuration, the insertion hole for attaching the cutting blade on one end is fixed to the hand tool on the other end. An attachment body having a connecting portion for Extension attachment that is equipped with an extension core material that is inserted into the Ment.

[0008]   Further, the present invention has an insertion hole for attaching a cutting blade on one end side to a hand tool on the other end side. An extension attachment comprising a connecting portion for fixing to the insertion hole, A bolt hole for fixing formed in the vicinity of the bolt and a fixing bolt screwed into the bolt hole And a flat portion for the fixing bolt and a concave portion for the fixing sphere are provided in the connection portion. It exists in the extension attachment.

[0009]   The extension attachment of the present invention configured as described above has a cutting blade on one end side. An attachment having an insertion hole for attachment on the other end side for fixing to a hand tool. And the attachment body, which is inserted into the attachment body to keep the cutting blade displaceable. The depth of holes to be drilled, such as shallow holes and deep holes Can be dealt with.

[0010]   Further, a fixing bolt hole formed in the vicinity of the insertion hole and screwed into the bolt hole. Having a fixed bolt, and a flat portion for the fixing bolt and a fixed ball in the connecting portion. By having a body recess, it can be attached to and detached from a hand tool smoothly and efficiently. Will be obtained.

[0011]

[Embodiment of device]

  Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, A is the present invention 1 is an extension attachment according to the present invention. As shown, it is detachably attached to the hand tool B.

[0012]   The extension attachment A, as shown in FIGS. 2 to 3, has a desired length. And a cutting blade 2 attached to the lower end side of the attachment body 1. An extension core material 3 for movably holding the cutting blade 2 is provided.

[0013]   As shown in FIG. 4, the attachment body 1 has a cutting blade 2 attached to the lower end side. Has a connecting portion 1b for fixing the insertion hole 1a for fixing to the hand tool B on the other end side. It

[0014]   Further, a bolt hole 1c for fixing and a bolt hole 1c are provided near the insertion hole 1a. And a fixing bolt 1d that is screwed into.

Further, the connecting portion 1b is provided with a flat portion 1b ₁ for a fixing bolt, a concave portion 1b ₂ for a fixing sphere, and a collar portion 1b ₃ for preventing the hand tool B from being inserted more than necessary. ing.

The flat portion 1b ₁ is formed parallel to the rotation axis of the attachment body _{1 and} is prevented from rotating by a fixing bolt (not shown). In other words, it can be attached to a punching device (hand tool) such as a drilling machine by tightening a fixing bolt (not shown).

The recess 1b ₂ is a female part for fixing with a fixing sphere (not shown), and can correspond to a one-touch type attachment / detachment mechanism using a hard sphere. In other words, the attachment body 1 can be fixed simply by inserting it into the attachment / detachment mechanism of the punching device (hand tool).

It is needless to say that the collar portion 1b ₃ prevents excessive insertion when it is inserted into the rotary shaft (not shown) of the cutting tool B and can be easily positioned.

[0019]   On the other hand, the cutting edge 2 is connected to the insertion hole 1a of the attachment body 1 on the upper end side. It has a connecting portion 2a.

[0020] The connecting unit 2a, similarly to the attachment body 1 includes a flat portion 2a ₁ of the fixing bolts, a recess 2a ₂ for bolting, and a flange portion 2 a ₃ to prevent insertion of more than necessary ing.

[0021]   On the other hand, the extension core material 3 is formed in the axial direction of the attachment body 1 and the cutting blade 2. It consists of a center drill that is inserted into the through holes 1e and 2b and prevents rotation in the longitudinal direction. Is formed with a flat rotation stopping surface 3a for keeping the cutting blade 2 from coming off on the tip side. I have.

[0022]   The extension core material 3 slides on the cutting blade 2 by loosening the fixing bolt 1d. The length of the cutting blade 2 can be changed depending on the depth of the hole to be drilled (mounting Position) can be changed (see FIG. 3).

In the extension attachment A thus configured, first, as shown in FIG. 1, the cutting blade 2 is fixed to the attachment body 1 with the fixing bolt 1d. At this time, the flat portion 2a ₁ is set to be the position of the fixing bolt 1d in which the flat of the cutting edge 1 d. After the cutting blade 2 is firmly fixed to the attachment body 1 with the fixing bolt 1d, the connecting portion 1b is inserted into the rotary shaft of the punching device. Connecting part 1b is inserted until it stops at the flange portion 1b _3.

At this time, if the attachment / detachment portion of the punching device (hand tool) is a one-touch type using a hard ball, the attachment body 1 is fixed only by inserting. Then, when the connecting portion 1b attachment body 1 is inserted, rigid sphere for fixed along the cut surface 1b ₄ (not shown) enters, and stops at the recess 1b _2. When rigid balls is stopped at the recess 1b _2, outside of the sleeve movable FIG axially is fixed restored. Further, in the case of the old-style bolt fixing method, after inserting the connecting portion 1b, a fixing bolt (not shown) is tightened and fixed. The overall dimensions of the attachment body 1 can be various lengths depending on the application.

[0025]   When removing the attachment body 1 from the punching device, if it is a one-touch system, A spring, etc. installed inside by pulling the detaching sleeve etc. in the axial direction Protruding by. If it is a bolt fixing type, tighten the fixing bolt before It is good to remove the attachment body.

[0026]   The extension attachment A of the present invention is not limited to this embodiment, and the present invention is not limited to this. The design can be freely changed within the scope of the purpose of the plan, and the present invention can change all of them. It is to include. For example, the attachment body 1, the cutting blade 2, the extension core 3 The size and shape are not limited to those in this embodiment, and as shown in FIG. The cutting blade 2 provided with may be used.

[0027]

[Effect of device]

  The present invention is configured as described above, and has an insertion hole for attaching the cutting blade on one end side. An attachment body having a connection portion for fixing to a hand tool on the other end side; Equipped with an extension core material that is inserted into the attachment body and holds the cutting blade displaceably This makes it possible to handle the depth of holes to be drilled, such as shallow holes and deep holes, and various lengths. It is possible to eliminate the conventional drawbacks such as having to prepare a blade for cutting

[0028]   Further, a fixing bolt hole formed in the vicinity of the insertion hole and screwed into the bolt hole. Having a fixed bolt, and a flat portion for the fixing bolt and a fixed ball in the connecting portion. By having a body recess, it can be attached to and detached from a hand tool smoothly and efficiently. It has the effect of swelling.

[0029]   In this way, the extension attachment according to the present invention adjusts the length of the cutting blade as needed. It can be changed and the attachment / detachment between the hand tool and the attachment body Can provide a useful extension attachment that can be performed with a simple Therefore, it is suitable for mass production and can be offered to customers as a low price, The practical value of implementing the present invention is enormous.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a usage state of an extension attachment (first embodiment) according to the present invention.

FIG. 2 is a perspective view showing the entire extension attachment.

FIG. 3 is a perspective view showing a state in which the extension attachment is extended.

FIG. 4 is an assembly exploded perspective view of the extension attachment.

5 (a) is a perspective view showing a second embodiment of the extension attachment according to the present invention, and FIG. 5 (b) is a bottom view of the same.

FIG. 6 is an explanatory view showing a state in which the extension attachment is extended.

[Explanation of symbols]

A Extension attachment B Hand tool 1 Attachment body 1a Insertion hole 1b Connection part 1b ₁ Flat part 1b ₂ Recessed part 1b ₃ Collar part 1b ₄ Cut surface 1c Bolt hole 1d Fixing bolt 1e Through hole 2 Cutting blade 2a ₁ Flat part 2a ₂ Recessed part 2a ₃ Collar 2b Through hole 3 Extension core 3a Detent face

Claims (2)

[Scope of utility model registration request] 1. An attachment body having an insertion hole for attaching a cutting blade on one end side and a connection portion for fixing a hand tool on the other end side, and a cutting blade inserted into the attachment body and attached thereto. An extension attachment, comprising: an extension core material that holds the core so that it can be displaced. 2. An extension attachment comprising an insertion hole for attaching a cutting blade on one end side and a connection portion for fixing a hand tool on the other end side, the fixing attachment being formed in the vicinity of the insertion hole. An extension attachment comprising a bolt hole and a fixing bolt screwed into the bolt hole, and the connecting portion having a flat portion for the fixing bolt and a recess for a fixing sphere.