JP2009047625A - Clamp for measurement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the operability in gripping a workpiece while a maximum number of bearing surfaces of a clamp for measurement are disposed. <P>SOLUTION: A storage groove 14 is disposed longitudinally in a lateral width central part on the top surface of a rectangular base, the front surface of the base is provided with an immobile jaw 11 below the front space of the storage groove, a movable jaw 2 facing the immobile jaw is stored in the base vertically movably in the front space of the storage groove, a rocking lever 3 is supported in the base vertically rockably in the rear space of the storage groove, converting sections 6 for vertically converting the rocking motion of the rocking lever into vertical movement of the movable jaw are disposed in the rear part of the movable jaw and at the front end of the rocking lever, and a spring 5 for pushing up the rocking lever is interposed between the rear part of the rocking lever and the base. The lateral width of the rear space of the storage groove is formed to correspond to a fingertip width. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a measurement clamp having a plurality of seating surfaces.

  There are various types of clamps, not only for measurement but also for processing. When the workpiece is thin or curved, such as when determining whether the workpiece is good or defective, hold the workpiece with a measurement clamp and use another measuring instrument. There is a method for measuring the dimensions of a workpiece.

  Usually, the seating surface of the clamp is the bottom surface, but if the surfaces other than the bottom surface, that is, the side surface, the top surface, and the back surface are the seating surfaces, it is easy to measure the three-dimensional dimensions of the workpiece.

A patent search was conducted prior to the application, but a patent application aimed at providing a plurality of bearing surfaces could not be found. As a conventionally known clamp capable of providing a plurality of seating surfaces, a clamp having a movable vise provided on a thin L-shaped block laid sideways so as to reciprocate has been discovered (Patent Document 1).
JP 2002-205263 A

  However, in the known clamp, the operator must move the movable vise every time the workpiece is sandwiched, and the movable vise must be screwed to the L-shaped block, so that the operability is poor. When the workpiece is a thin object, for example, when the workpiece is about 0.05 to 1.30 mm, such as a cellular phone part, the poor workability takes time to measure.

  The present invention has been created in consideration of the above circumstances, and a solution to that problem is to improve operability when sandwiching a workpiece while providing as many seating surfaces as possible.

  The measuring clamp according to the present invention is provided with a housing groove along the front and rear in the center of the lateral width on the upper surface of the rectangular parallelepiped base, and a stationary jaw protruding forward in the center of the lateral width on the front surface of the base from the front space of the housing groove. The base has a movable jaw facing the immobile jaw that can be moved up and down in the front space of the accommodation groove, a slider is suspended from the rear of the movable jaw, and a guide hole that guides the slider is contained in the accommodation groove. The base is formed in a state where it communicates with the base, and a swing lever is supported on the base by a pin that can swing up and down in the rear space of the receiving groove, and the swing lever swing is converted into a vertical movement of the movable jaw. And a spring for pushing up the rocking lever is interposed in the housing groove between the rear part of the rocking lever and the base.

As the size of the base is reduced, the straightness (accuracy of vertical movement) of the slider that moves along the guide hole becomes unstable. Nevertheless, in order to stabilize straightness, it is desirable to do the following.
That is, the left and right end portions of the rear portion of the movable jaw are made part of the slider by projecting left and right relative to the front portion of the movable jaw and the swing lever, and the slider is formed wider in the vertical direction.

Furthermore, the smaller the base is, the more difficult it is to secure the seating surface, the support area of the left and right ends of the pin, and the ease of picking the swing lever. To solve this, it is desirable to do the following.
That is, the lateral width of the rear space of the receiving groove is made wider than that of the front space and formed to be equivalent to the fingertip width.

  In the present invention, the movable jaw, the swing lever, and the spring are accommodated in the accommodation groove of the base, and the stationary jaw protrudes forward on the front surface of the rectangular parallelepiped base. It can be measured in various postures while being clamped. Moreover, since the fixed jaw and the movable jaw are provided in the central portion of the width with respect to the base, the front surfaces of the base corresponding to the left and right sides of these jaws are flush with each other. Therefore, when clamping a wide workpiece to these jaws, if the end surface of the workpiece is pressed against the front surface, the end surface is positioned, and the front surface of the base becomes the reference surface for measuring the length of the workpiece. Furthermore, since the upper surface of the base has an accommodation groove in the central portion of the width, a seating surface is formed over the entire length of the front and rear in the left and right side portions, so that the stability as the seating surface can be improved.

  In addition, if the left and right ends of the rear part of the movable jaw are part of the slider by protruding left and right from the front part of the movable jaw and the swing lever, and the slider is formed wider up and down, the base can be downsized. Also, the straightness of the slider can be secured and the workpiece can be clamped stably.

  Furthermore, if the lateral width of the rear space of the receiving groove is made wider than that of the front space and formed to be equivalent to the fingertip width, the seating surface area of the upper surface of the base can be earned on the left and right of the front space of the receiving groove, and the left and right ends of the pin The support of the part can be secured. In addition, since the space behind the receiving groove is about the fingertip width, the swing lever is easy to operate. Therefore, the function of the clamp can be sufficiently exhibited even if the size is reduced.

  As shown in FIGS. 1 to 8, the measurement clamp includes a rectangular parallelepiped base 1, a movable jaw 2 that moves up and down relative to a stationary jaw 11 of the base 1, and a swing lever 3 that moves the movable jaw 2 up and down. And a pin 4 that supports the swing lever 3 on the base 1 and a spring 5 that presses the movable jaw 2 against the fixed jaw 11 as components.

  The measurement clamp has a rectangular parallelepiped base 1 front surface (formation surface of the immovable jaw 11) as a clamping surface of the workpiece W and the other five surfaces as seating surfaces. The movable jaw 2, the swing lever 3, The pin 4 and the spring 5 are accommodated in the base 1, and the front portion of the movable jaw 2 is projected forward from the front plane of the base 1 in accordance with the fixed jaw 11.

  The measurement clamp accommodates the movable jaw 2 in the base 1 so as to be movable up and down, and a swing lever 3 can be swung up and down by a pin 4 inside the base 1 and behind the movable jaw 2. A conversion portion 6 that supports and converts the swing motion of the swing lever 3 into the vertical movement of the movable jaw 2 is provided at the rear portion of the movable jaw 2 and the front end portion of the swing lever 3, and the rear portion of the swing lever 3 and the base The spring 5 is accommodated in a contracted state between the upper part and the rear part of the first part.

  The base 1 includes a main body 12 and a sub body 13 as components, and the sub body 13 is assembled to the front surface of the main body 12 with bolts or the like, and is formed in a rectangular parallelepiped shape as a whole. The base 1 is formed with an accommodation groove 14 along the front and back at the center in the width direction on the upper surface thereof. The base 1 is set to have a lateral width overall length wider than the fingertip width, and the rear space of the housing groove 14 is set to be equivalent to the fingertip width that extends to the left and right.

  In the base 1, a lower hole 15 that accommodates the lower portion of the spring 5 is opened downward in the front and rear intermediate portion of the space behind the accommodation groove 14. In the base 1, a guide hole 16 that guides the slider 22 below the movable jaw 2 is opened downward in the front and rear intermediate part of the front space of the accommodation groove 14. In the base 1, pinholes H penetrating the left and right side surfaces are opened at the front and rear intermediate portions of the accommodation groove 14.

  The base 1 has an immovable jaw 11 protruding forward at a lateral intermediate portion of the front surface. The immovable jaw 11 is narrower to the left and right than the lateral width of the accommodation groove 14, and its upper surface is a clamping surface that is flush with the bottom surface of the accommodation groove 14.

  Other than the front surface of the base 1 is a seating surface. The upper surface of the base 1 is a plane that is divided into left and right with the receiving groove 14 as a boundary, and each has a form in which a narrow rear portion is continuous with a rear outer side of a wide front portion. The left and right side surfaces of the base 1 are rectangular planes. The rear surface of the base 1 is a U-shaped plane that opens upward. The bottom surface of the base 1 is a rectangular plane.

  In the base 1, bolt holes for integrating the sub body 13 and the main body 12 are formed on the left and right sides of the front surface with hexagon socket bolts apart from each other. The main body 12 and the sub body 13 are formed by dividing the prepared hole 15, the guide hole 16, the fixed jaw 11, and the like.

  The movable jaw 2 has a front bottom surface of the jaw body 23 as a sandwiching surface, a slider 22 is suspended downward from the rear of the jaw body 23, and a groove-shaped recess 21 is formed on the rear surface along the left and right sides. .

  The swing lever 3 has a front lower portion projecting forward to form a convex portion 31, and an upper hole 32 that accommodates the upper portion of the spring 5 is formed in the rear bottom surface, and a pin 4 is interposed between the convex portion 31 and the upper hole 32. A through-hole 33 is formed to penetrate from side to side.

  The conversion part 6 is a concave part 21 and a convex part 31 that fit together in a playable state, and is formed separately at the front part of the swing lever 3 and the rear part of the movable jaw 2.

  The pin 4 is press-fitted into the pin hole H from one side surface of the base 1 and is pressed into the opposite side surface through the hole 33 of the swing lever 3 and fixed.

  The spring 5 is a coil spring, and in a contracted state, the spring 5 gives a force for pushing upward to the rear part (front part) of the swing lever 3, and finally pushes the movable jaw 2 into the stationary jaw 11 to move the workpiece W. Give the force to pinch.

  The workpiece W is a thin-walled object as described above, and is assumed to be about 0.05 to 1.30 mm, such as a mobile phone component.

  As shown in FIGS. 2A to 2C, the measurement clamp described above can use a surface other than the front surface as a seating surface even when the workpiece W is sandwiched between the immovable jaw 11 and the movable jaw 2. The workpiece W can be measured in various postures.

  As shown in FIG. 9, another measurement clamp is formed by integrally forming the base 1. This improves the accuracy of the base 1 as a seating surface. In addition, by pressing the rear end surface of the workpiece W against the front surface of the base 1 and clamping, the front surface of the workpiece W becomes a measurement reference surface.

  Further, as shown in FIGS. 10 to 12, another measurement clamp is configured such that the left and right end portions of the rear portion of the movable jaw 2 protrude leftward and rightward from the front portion of the movable jaw 2 and the swing lever 3. The slider 22 is formed to be wide in the vertical direction, and the left and right ends of the movable jaw 2 are surrounded by a guide hole 16 from the outside in a U-shape. That is, the guide hole 16 penetrates the upper and lower surfaces of the base 1. Further, the slider 22 has a screw hole 41 formed in the lower portion thereof along the front-rear direction, a ball plunger 42 for preventing backlash is screwed into the screw hole 41, and the force of the coil spring 43 inside from the tip of the plunger screw 44. By protruding a part of the ball 45 and bringing the ball 45 into contact with the guide hole 16, the slider 22 is prevented from rattling in the guide hole 16, and the linear accuracy of the slider 22 in the vertical direction is improved.

  As shown in FIG. 15, a variation of the measurement clamp is provided with a ball plunger 42 for preventing backlash symmetrically with respect to the slider 22 and a digging hole on the opposite side of the ball plunger 42 from the ball. 48 is formed along the left and right, and the roller 49 is accommodated in the digging hole 48 with a part of the roller 49 protruding, and the rear surface of the slider 22 is brought into surface contact within the guide hole 16 by utilizing the rotation of the roller 49. Without moving up and down.

  Further, as shown in FIGS. 13 and 14, another measurement clamp is formed by widening the width of the base 1, the fixed jaw 11, and the movable jaw 2. In this case, the springs 5 are arranged on the lower left and right sides of the swing lever 3 so that force is evenly applied to the left and right. In some cases, in order to be able to lock the clamped state of the workpiece W, another screw hole 46 is formed in the bottom surface of the base 1 toward the housing groove 14, and a lock screw 47 is screwed into the screw hole 46. Then, the tip end of the rocking lever 3 is pushed up by the tip of the lock screw 47, and the movable jaw 2 is held in parallel with the fixed jaw 11.

(A) to (f) are a bottom view, a front view, a plan view, a rear view, a right side view, and a cross-sectional view along line AA of the measurement clamp. (A) to (c) are explanatory views showing a state in which a workpiece is grasped. (A) to (e) are a front view, a plan view, a rear view, a right side view, and a cross-sectional view along line AA of the base. (A) to (f) are a front view, a plan view, a rear view, a BB line sectional view, a right side view, and an AA line sectional view of the main body. (A) to (c) are a front view, a plan view, and a right side view of the sub-body. FIGS. 4A to 4D are a front view, a plan view, a rear view, and a right side view of the movable jaw. (A) to (f) are a bottom view, a front view, a plan view, a rear view, a right side view, and a cross-sectional view taken along line AA of the swing lever. It is a perspective view which shows the assembly | attachment state of the clamp for a measurement. It is a perspective view which shows another measurement clamp. It is a perspective view which shows another measurement clamp. FIGS. 10A to 10C are a plan view, a cross-sectional view taken along line AA, and a cross-sectional view taken along line BB of the measurement clamp of FIG. 10. It is sectional drawing which shows a ball plunger. It is a perspective view which shows another measurement clamp. (A) and (B) are a plan view and a rear view of the measurement clamp of FIG. It is sectional drawing which shows the modification of the measurement clamp of FIGS.

Explanation of symbols

1 base, 2 movable jaws, 3 swing levers, 4 pins, 5 springs, 6 converters,
11 fixed jaw, 12 main body, 13 subbody, 14 receiving groove, 15 pilot hole,
16 guide holes, H pin holes, 21 recesses, 22 sliders, 23 jaw bodies,
31 convex part, 32 upper hole, 33 extraction hole 41 screw hole, 42 ball plunger, 43 coil spring, 44 plunger screw,
45 balls, 46 screw holes, 47 lock screws, 48 digging holes, 49 rollers,

Claims (3)

  An accommodation groove (14) is provided along the front and rear in the lateral width central portion on the upper surface of the rectangular parallelepiped base (1), and a stationary jaw (11) protruding forward is provided in the lateral width central portion on the front surface of the base (1). The movable jaw (2), which is provided below the front space of (14) and faces the fixed jaw (11) is accommodated in the base (1) so as to be movable up and down in the front space of the accommodation groove (14), A slider (22) is suspended from the rear part of the movable jaw (2), and a guide hole (16) for guiding the slider (22) is formed in the base (1) so as to communicate with the receiving groove (14). The swing lever (3) is supported by a pin (4) so that it can swing up and down in the rear space of the receiving groove (14), and the swing lever (3) swings up and down the movable jaw (2). The conversion part (6) for converting into motion is provided at the rear part of the movable jaw (2) and the front end part of the swing lever (3) to swing. Measuring clamp, characterized in that interposed between the bar (3) spring to boost (5) a receiving groove (14) is within the in swing lever (3) the rear and base (1).   The left and right end portions of the rear portion of the movable jaw (2) protrude from the front portion of the movable jaw (2) and the swing lever (3) to the left and right to form a part of the slider (22). The measurement clamp according to claim 1, wherein the measurement clamp is formed wide in the vertical direction.   The measurement clamp according to claim 2, wherein the lateral width of the rear space of the receiving groove (14) is wider than that of the front space and is formed to be equivalent to the fingertip width.

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