JP2010029969A - Simple perforating tool for handicraft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such problems that loud noise is generated when a punch is hit by a hammer, and a cloth or leather is taken up together with the punch by friction when the punch is withdrawn after pushed in, and hence work efficiency is impaired, when a desired hole is perforated through leather or a thick cloth using the punch. <P>SOLUTION: A punch is mounted to an operation lever, a base end of which has been supported by a pivot with a bed, facing the bed. Leather to be processed can be perforated by the up and down movement of the operation lever. A pressing member extending to near the tip of the punch is mounted to the operation lever. The punch can be withdrawn from the leather to be processed, in such a state that the pressing member presses the leather to be processed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a simple punching tool suitable for handicrafts, and more particularly to a punching tool suitable for leather punching.

  In handicrafts, for example, in order to join relatively thick woven fabrics or thin leathers, a round or rhombus hole may be formed at the edge and tied through a string. In order to pierce the hole through which the string passes, conventionally punches and sculptures of the same shape as the hole to be pierced were used, and hammering was performed with a hammer. , Family and others, there were problems that caused trouble to others.

  In order to solve such problems, a method using power (see Patent Document 1) is also known, but the apparatus is expensive and is not suitable for handicrafts. Therefore, the inventor has come up with the idea of using a lever to make a simple tool that can obtain a large drilling force without being hit by a lever as shown in FIG. In addition, the code | symbol in FIG. 5 attaches | subjects the code | symbol similar to having used for description about the component which has a function similar to the Example of this invention.

  However, since the lever's action exerts a force only in one direction, even if it is easy to push the punch into the leather, the leather lifts up with the punch due to friction between the punch and the leather once the punch is pulled out. As a result, there was a problem that the work efficiency was remarkably lowered because a process for separating it was required.

JP-A-11-42595

  The problem to be solved is that when a hole is opened in a processed skin made of leather or thick fiber by using a lever, the work for removing the punch used for drilling from the material can be facilitated. There is a need for a drilling tool that has a simple structure and is easy to manufacture.

  According to the present invention, an elongated base is provided with a support portion of a workpiece to be processed at one end and a hinge pin at the other end, and an operation lever extending upward along the base is rotatably attached to the hinge pin. A drilling tool extending in the direction of the support portion is attached to the lower surface of the lever, the free end of the operation lever is formed into a cylindrical shape, and the other end of the operation handle having a grip portion at one end is inserted therein. It is pivotally supported within a predetermined range, is located at the inner end of its operation handle, has a through hole in the lower surface of the operation lever, and supports the upper part of the pressing member from below so that it can rotate. The most important feature is that the lower end of the pressing member is held in the vicinity of the punch by a spring material.

  The simple punching tool for handicrafts according to the present invention punches the work skin by raising and lowering the punch that is a punching tool using the principle of leverage, so that it does not generate a striking sound during drilling. The device is also small and does not take up space, and the device can be moved easily.

  In addition, when the punch is removed from the workpiece skin after the punching operation, the pressing member presses the workpiece skin in the vicinity of the punch on the support base prior to the withdrawal of the punch. Since there is no problem that the processed leather rises, the drilling operation can be facilitated.

  Further, since the operation handle is pivotally supported in a state where it is inserted into the end of the cylindrical operation lever, the appearance is excellent, and the operation handle rotates the operation lever. Since the pressure member is shared with the operation of moving the pressing member forward and backward toward the work piece, there is an effect that the operation is easy because it is not necessary to carry out the two operations of the drilling operation and the leaving operation.

  Hereinafter, the illustrated embodiment will be described. In the figure, 10 is a handicraft simple punch, and the handicraft simple punch 10 has a base 12 formed of a square steel pipe. The base 12 is provided with a support portion 12a for the work skin W at one end, and two brackets 12b and 12b are welded to the other end. A hinge pin 14 is attached to the brackets 12b and 12b, and an operation lever 15 is pivotally supported.

  The operation lever 15 is made by welding two square steel pipes made of steel, and includes a vertical portion 15a extending upward from the hinge pin 14 and a horizontal portion 15b extending from the vicinity of the upper end of the vertical portion to the operator side. It has a substantially L shape, and a punch T as a drilling tool is attached to the lower surface of the horizontal portion 15b.

  That is, the punch T is inserted from below into a square steel pipe 15c welded downward to the lower surface of the horizontal portion 15b, and then is inserted into the square steel pipe 15c by a butterfly bolt 22 screwed into one of the corners. Although it is configured to be detachably fixed by pressing against the inner surface of the corner, this configuration itself is not new and is commonly used.

  One end of a dedicated operating handle 17 made of steel having a square cross section is inserted into the opening end of the horizontal portion 15b on the operator side of the operating lever 15, and is supported by the horizontal pivot 16 in the vertical direction. It can be turned. Further, a through hole 15 d is provided in the lower inner wall, and the upper part of the suspension rod 22 is inserted from below and supported by the suspension pin 19 so as to be rotatable. Therefore, the lifting / lowering range of the hanging rod 22 is a slight range in which the distal end portion inserted into the horizontal portion 15b of the operation handle 17 does not contact the upper inner wall or the lower inner wall of the horizontal portion 15b, that is, the work skin W The thickness is limited to a range of 2 to 4 mm, which is slightly larger than the thickness.

  A pressing member 20 for pressing the workpiece skin W onto the support portion 12a is attached to the lower end portion of the hanging rod 22. The pressing member 20 is provided to hold down the workpiece skin W onto the support portion 12a when the punch T is pulled out of the workpiece skin W, and is made of an elongated substantially strip-shaped steel plate. The upper end portion of the pressing member 20 is firmly held by a boss 22a provided on the suspension rod 22 and a nut 23, and the lower end portion extends to the vicinity of the cutting edge of the punch T. Reference numeral 24 denotes a spring for urging the suspension rod 22 toward the side surface of the punch T. Thus, the pressing member 20 is always in contact with the side surface of the punch T.

  Reference numeral 40 denotes a guide member placed on the work table 18 and is used for moving the work skin W in a straight line. The guide member 40 is formed by bending a thin metal plate. As shown in FIG. 4, the guide member 40 has a substantially U-shaped cross section by a support surface 41 supported on the work table 18 and reinforcing sleeves 42 and 42 on both sides thereof. It is made into a shape.

  Further, the lower edges of the reinforcing sleeves 42 on both sides are slightly narrower than the width of the workbench 18 and are slightly deformed when attached to the workbench 18 and are locked in place by the elasticity. It has come to be. Further, the end of the support surface 41 on the operator side is extended and then bent upward to form the guide wall 43.

  Therefore, in order to attach the guide member 40 to the work table 18, it is sufficient to increase the distance between the reinforcing sleeves 42, 42 and place it on the upper surface of the work table 18, and it is fixed by the elasticity of the reinforcing sleeves 42, 42. 42, 42 can be slid in a state of being in contact with the side surface of the work table 18, whereby the distance between the punch T and the guide wall 43, in other words, the edge of the work skin W is perforated. The distance from the hole can be changed.

  Further, when the edge of the leather that is the processed leather W is brought into contact with the guide wall 43, the position to be punched is determined by the punch T, and the holes are aligned in a line by moving along the guide wall 43. Can drill.

  Next, an operation of making a small hole in the work skin W will be described with reference to FIG. FIG. 2A shows the initial position, and in the drawing, the punch T and the pressing member 20 are on the support portion 12a of the base 12. From this state, the operator lifts the operating handle 17 from the top of the base 12 with one hand and moves the punch T attached to the operating lever 15 and the pressing member 20 upward, and the other hand shows the same figure (b). ), The workpiece W is placed on the support portion 12a of the base 12, and abutted against the guide member 40 and positioned at a predetermined position. At this time, as a matter of course, the free end portion of the operation handle 17 is in contact with the inner lower wall of the horizontal portion 15b, and the pressing member 20 protrudes to the maximum extent downward.

  From this state, when the force that lifted the operation handle 17 is loosened and rotated downward, the operation lever 15 rotates downward due to its own weight, and the punch T and the pressing member 20 are substantially simultaneously applied to the workpiece W. Since the lowering stops after coming into contact, a force is applied to the operation handle 17 to perform drilling.

  When a force is applied to the operation handle 17 and pushed downward, first, only the operation handle 17 rotates with respect to the operation lever 15, and the pressing member 20 moves upward with respect to the punch T via the suspension rod 22. As shown in FIG. 5C, only the punch T enters the workpiece W and the perforation is gently performed.

  When the punching of the workpiece skin W is finished and the punch T is pulled out of the workpiece skin W, when the operation handle 17 is lifted, first, the pressing member 20 is lowered via the suspension rod 22 and the workpiece near the punch T is processed. It abuts on the material W and presses the upper surface of the workpiece W toward the support portion 12a.

  When the operation handle 17 is further rotated upward, the pressing member 20 is continuously pressed against the workpiece W. Therefore, as shown in FIG. 4D, the punch T holds the workpiece W on the support portion 12a. The upper member moves upward and leaves, leaving the top, and then the pressing member 20 also moves upward.

  Therefore, when the operation lever 15 is pivoted upward about the hinge pin 14 and the punch T is detached from the workpiece W, the so-called lifting of the work skin W together with the punch T is prevented. Can be smoothly detached from the work skin W.

It is a front view of the simple punching tool which shows one Example of this invention. FIG. It is a right view of FIG. It is an external view of the guide member which is the principal part. It is process drawing which shows the action | operation process of the simple punch for handicrafts. It is a right view equivalent to FIG. 3 which shows the conventional simple punch for handicrafts.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Handicraft simple punch 12 Base 12a Support part 12b Bracket 14 Hinge pin 15 Operation lever 15a Vertical part 15b Horizontal part 15c Square steel pipe 15d Through-hole 16 Horizontal axis 17 Operation handle 18 Work table (rubber base)
18a Escape hole 19 Hanging pin 20 Pressing member 22 Hanging rod 22a Boss 23 Nut 24 Butterfly bolt 26 Spring 40 Guide member 41 Support surface 42 Reinforcement sleeve 43 Guide wall S Distance T Drilling tool (punch)
W Worked skin

Claims (5)

  An elongated base is provided with a support for the workpiece skin at one end and a hinge pin at the other end, and an operating lever extending upward along the base is rotatably attached to the hinge pin. A drilling tool extending in the direction of the support portion is attached, the free end of the operation lever is formed in a cylindrical shape, and the other end of the operation handle having a grip portion at one end is inserted into the inside of the predetermined range. Is pivotally supported at the inner end of the operating handle, and a through hole is formed in the lower surface of the operating lever. The upper part of the pressing member is rotatably inserted from below and supported. A simple punching tool for handicrafts in which a lower end portion of a member is held in the vicinity of the punching tool by a spring material.   The simple punch for handicraft according to claim 1, wherein the base is made of a square steel pipe.   The simple punching tool for handicrafts according to claim 1, wherein the operating lever is formed in a substantially L shape by a vertical portion extending upward from the hinge pin and a horizontal portion extending from the vicinity of the upper end of the vertical portion toward the operator.   4. The horizontal portion of the operation lever according to claim 3, wherein the horizontal portion is made of a square steel pipe, and the operation handle is pivotally supported by a horizontal pivot while being inserted into the open end of the horizontal portion, and the pressing end is pushed to the free end. A simple punch for handicrafts, in which the upper end of the member is pivotally supported.   The simple punching tool for handicrafts according to claim 1, wherein a rubber-like guide member provided with a guide hole is interposed between a support portion of a work piece provided at one end of the base and the punching tool.

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