JP2010014571A - Measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust simply an application pressure of a detection sensor mounted on a measuring object. <P>SOLUTION: The detection sensor built in a holder 4 is allowed to abut on a measuring spot of a tie-bar 2, and a band body 5 is wound around the holder 4 to fix temporarily the holder on the tie-bar 2. An adjustment screw screwed with the holder 4 is turned and fastened, while confirming an indicator, and thereby a pressurizing tube is pressed by a pressing plate. In this case, the application pressure of the detection sensor to the tie-bar 2 is displayed on an indicator, and rotation of the adjustment screw is stopped when a proper application pressure is attained, to thereby enable mounting of the detection sensor on the tie-bar 2 with a proper application pressure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a measurement apparatus that is mounted on a measurement object and measures distortion such as twist, deflection, and tension of the measurement object.

  Conventionally, molds such as injection molding machines have been divided into a plurality of parts, each of which is clamped together, and a cavity formed between the molds is filled with molten resin. In this mold clamping apparatus, a tie bar is coupled to a mold support member that supports the mold. A mold clamping force acts on the tie bar and a distortion corresponding to the mold clamping force is generated, and the mold clamping force of the mold clamping device is detected by measuring the distortion.

  2. Description of the Related Art Conventionally, devices having various structures for measuring strain and the like by attaching a detection sensor to a cylindrical member such as a tie bar have been proposed. For example, Patent Document 1 discloses a case-type protection with a built-in detection sensor. There has been proposed a strain measuring device in which a member is attached to a flexible belt-like member, and both ends of the belt-like member can be connected by a connecting means that can be engaged and disengaged by engagement of a bolt / nut or hook and clip. . Patent Document 2 discloses a pressure detection sensor, an attachment for temporarily fixing the pressure detection sensor to the surface of the measurement object, and the pressure detection sensor temporarily fixed to the surface of the measurement object by the attachment. There has been proposed a pressure detection device configured with a band that is tightened from above the attachment in a state. Furthermore, in Patent Document 3, a U-shaped frame member having a pair of opposing sandwiching pieces is provided, a strain detection sensor is slidably incorporated in each sandwiching piece, and the strain detection sensor is attached to a spring or the like. A mold clamping force detection device has been proposed in which a cylindrical member is pressed against the surface by an elastic body.

JP 2001-255113 A JP 2003-149060 A Japanese Patent No. 3806899

  However, the strain measuring device shown in Patent Document 1 directly connects the detection sensor attached to the belt-like member to the object to be measured by connecting both ends of the belt-like member by engagement of a bolt / nut or hook and clip. Further, in Patent Document 2, for example, a so-called flexible binding band that bundles a plurality of wirings is connected in an annular shape and is tightened by attaching the detection sensor to the object to be measured. It is. Therefore, the pressing force (contact pressure) of the detection sensor to the measurement object is determined by the tightening force of the belt-like member or the band when the measurement sensor is attached to the measurement object. For this reason, if the belt-like member or band is tightened strongly, the applied pressure of the detection sensor to the object to be measured is too strong, and conversely if the tightening force of the belt-like member or band is weak, the applied pressure of the detection sensor becomes weak. Since the contact pressure of the detection sensor to the object to be measured is not constant due to tightening at the time of mounting, it is difficult to attach the detection sensor to the object to be measured with an appropriate contact pressure. In this regard, since Patent Document 3 urges the strain detection sensor to the measurement object by an elastic body such as a spring, the contact pressure of the detection sensor to the measurement object can be kept constant according to the urging force of the elastic body. After all, since the contact pressure of the detection sensor is determined by the biasing force of the elastic body, the pressure of the detection sensor cannot be adjusted to be stronger or weaker than the elastic body. Has a problem.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a measuring apparatus that can easily adjust the applied pressure of a detection sensor attached to a measurement object.

  The measuring apparatus according to claim 1 is a measuring apparatus that performs various measurements on a measurement object by bringing the detection sensor into contact with the measurement object, and a holder that holds the detection sensor and a band body that attaches the holder to the measurement object. And a pressurizing tube that pressurizes the detection sensor against the object to be measured and adjusts the pressure applied by the detection sensor that is brought into contact with the object to be measured via the pressure tube. An adjusting means is provided.

  According to the configuration of the first aspect, the holder is temporarily fixed to the measurement object by the band body with the detection sensor provided on the holder in contact with the measurement portion of the measurement object. Then, the pressure adjustment means adjusts the pressure applied to the object to be measured by the pressure tube, and when pressure or tensile force is applied to the object to be measured, distortion due to expansion or contraction of the object to be measured, etc. Is detected by a detection sensor.

  According to a second aspect of the present invention, there is provided a pressure display means for displaying the pressure applied by the detection sensor to the object to be measured.

  According to the configuration of the second aspect, when adjusting the pressing force of the detection sensor attached to the measurement object, the pressing force of the detection sensor is displayed on the pressurizing display means.

  According to a third aspect of the present invention, the band body has flexibility, and a buckle portion having a slit is provided at one end of the band body, and the band body is pulled by pulling the slit through the other end of the band. The holder is attached to the measurement object so that the detection sensor is in close contact with the measurement object.

  According to the configuration of claim 3, the holder is measured by the band body by pulling the other end of the band through the slit of the buckle portion while the detection sensor provided on the holder is in contact with the measurement portion of the measurement object. The holder is temporarily fixed to the body.

  The measurement apparatus according to claim 4, wherein the pressurizing tube, the pressurizing adjustment unit, and the pressurization display unit are incorporated into the holder to form a unit, and the pressurization adjusting unit slides into the holder. A press plate provided freely, and an adjustment screw that slides the press plate so as to contact and separate from the pressurizing tube, and the pressurizing tube is compressed by the press plate by rotating and tightening the adjusting screw. In this way, the pressure applied by the detection sensor to the object to be measured is adjusted.

  According to the configuration of claim 4, by rotating the adjustment screw and compressing the pressure tube with the pressing plate, the detection sensor is pressed against the measurement portion of the measured object, and the measurement target is measured according to the amount of tightening of the adjustment screw. The pressure of the detection sensor on the body is adjusted.

  The measuring apparatus according to claim 5 is configured such that the pressurizing adjustment unit is configured by a pressurizing supply unit that supplies fluid or gas to the inside of the pressurizing tube, and the pressurizing supply unit expands the pressurizing tube. The present invention is characterized in that the pressure applied by the detection sensor to the object to be measured is adjusted.

  According to the configuration of claim 5, by supplying a fluid or gas into the inside of the pressurizing tube by the pressurizing supply means, the pressurizing tube expands, and a detection detection sensor is provided at the measurement location of the measurement object by the expansion pressure. The pressure applied by the detection sensor to the measurement object is adjusted according to the expansion pressure of the pressure tube.

  According to the measuring apparatus of claim 1, a detection sensor that is brought into contact with the measurement object, a holder that holds the detection sensor, and a length-adjustable band that has flexibility to attach the holder to the measurement object. A body, a flexible pressure tube for bringing the detection sensor into close contact with the body to be measured, and a pressure adjusting means for adjusting the pressing force of the detection sensor on the body to be measured by the pressure tube By configuring a measuring device that performs various measurements on the object to be measured, even if a change occurs in the pressure applied by the detection sensor to the object to be measured, it can be easily corrected by the pressurizing adjustment means. The pressure applied by the detection sensor to the object to be measured can be maintained in an appropriate state.

  According to the measuring apparatus of claim 2, when the pressurizing display means for displaying the pressurizing force of the detection sensor with respect to the measured object is provided, the pressurizing force of the detection sensor attached to the measured object is adjusted. Since the pressure applied by the detection sensor can be displayed on the pressure display means, it is detected by the pressure display means when setting the detection sensor on the object to be measured or when correcting the pressure applied by the detection sensor to the object to be measured. While confirming the applied pressure of the sensor, it can be easily adjusted so that the applied pressure of the detection sensor becomes an appropriate value.

  According to the measuring apparatus of claim 3, the band body has flexibility, and a buckle portion having a slit is provided at one end of the band body, and the band body is pulled through the other end of the band. Since the holder is attached to the measurement object so that the detection sensor is in close contact with the measurement object, the detection sensor is measured by the band body regardless of the cross-sectional shape or diameter of the measurement object. Can be easily attached to the body.

  According to the measuring apparatus of claim 4, the pressurizing tube, the pressurizing adjusting means, and the pressurizing display means are incorporated into the holder to form a unit, and the pressurizing adjusting means is disposed in the holder. And a pressure plate that is slidably provided on the pressure tube, and an adjustment screw that slides the pressure plate so that the pressure plate can be moved toward and away from the pressure tube. Since the pressure applied by the detection sensor to the object to be measured is adjusted by compression, the pressure applied by the detection sensor can be easily adjusted according to the amount of tightening of the adjusting screw.

  According to the measuring apparatus of claim 5, the pressurizing adjusting means is constituted by a pressurizing supply means for supplying the fluid or gas into the pressurizing tube, and the pressurizing supply means expands the pressurizing tube. Thus, the pressure applied by the detection sensor to the object to be measured is adjusted, so that the pressure applied by the detection sensor can be easily adjusted to the amount of fluid or gas supplied to the pressurizing tube.

  Embodiments of the present invention will be described based on examples with reference to the drawings. FIG. 1 is an explanatory view showing a measuring apparatus in use according to a first embodiment of the present invention, FIG. 2 is an explanatory view of a band body, FIG. 3 is a plan sectional view, a front view, a side sectional view, and a side view of the measuring apparatus. FIG.

  As shown in the figure, the measuring apparatus 1 is mounted on, for example, a side surface of a tie bar 2 of an injection molding machine as an object to be measured, and measures strain (pressing force or tensile force). The tie bar 2 has a cylindrical shape with a circular cross section, and the measuring device 1 includes a holder 4 in which the detection sensor 3 is built, and a band body 5 for attaching the holder 4 to the outer peripheral surface of the tie bar 2. The band body 5 is formed of a flexible material. A slit 6a for passing the other end of the band body 5 is formed in a buckle 6 formed at one end of the band body 5. The band body 5 drawn out from the slit 6a By pulling the other end, the band body 5 is connected in an annular shape, and the holder 4 containing the detection sensor 3 is fixed to the tie bar 2. The holder 4 is provided with an indicator 7 as display means, and the indicator 7 displays the pressure applied by the detection sensor 3 that contacts the tie bar 2. The holder 4 is provided with a pressurizing tube 10 that adjusts the pressure applied by the detection sensor 3 to the tie bar 2 and a pressing plate 11 that presses the pressurizing tube 10. The pressure tube 10 is formed of a stretchable synthetic resin, synthetic rubber, or the like, and the pressing plate 11 that can come into contact with the pressure tube 10 is slidably assembled to the holder 4. An adjustment screw 12 is screwed to the holder 4 and its tip is pivotally attached to the push plate 11. Note that a fluid or gas is sealed inside the pressure tube 10, and the pressure tube 10 is compressed by tightening the adjusting screw 12 and pressing the pressure tube 10 with the pressing plate 11, thereby detecting the sensor 3. Is attached to the tie bar 2 in close contact. The pressure applied by the detection sensor 3 that contacts the tie bar 2 is displayed on the indicator 7. Further, the holder 4 is formed with an insertion slit 15 through which the band body 5 is passed, and the band body 5 is formed with a guide slit 16 through which the adjustment screw 12 screwed to the holder 4 is passed.

  In order to attach the measuring apparatus 1 of the present embodiment configured as described above to the tie bar 2, first, the holder 4 is held on the band body 5 through the band body 5 through the insertion slit 15 formed in the holder 4. Thereafter, the adjusting screw 12 is screwed into the holder 4 through the adjusting screw 12 in the guide slit 16 formed in the band body 5. Then, the detection sensor 3 provided on the holder 4 is brought into contact with the tie bar 2 measurement point, and one end of the band body 5 passed through the holder 4 is pulled through the slit 6a of the buckle 6 formed at the other end of the band body 5. The band body 5 is connected in an annular shape, the detection sensor 3 is brought into close contact with the tie bar 2, and the holder 4 is temporarily fixed to the tie bar 2. Then, the adjusting screw 12 is tightened while checking the indicator 7 and the pressure tube 10 is pressed by the push plate 11, so that the pressure sensor 10 is compressed and attached to press the detection sensor 3 against the tie bar 2. In the present embodiment, two sets of measuring devices 1 are attached to the tie bar 2, and the strain applied to the tie bar 2 is detected based on the average value.

  As described above, in this embodiment, the adjusting screw 12 is tightened, the pressure tube 10 is compressed with the push plate 11 and the detection sensor 3 is pressed against the tie bar 2, thereby applying pressure or tensile force to the tie bar 2. At this time, distortion due to expansion and contraction of the surface of the tie bar 2 is detected by the detection sensor 3, and for example, a clamping force of a clamping device provided in the injection molding machine is detected.

  Accordingly, in the present embodiment, the detection sensor 3 is attached to the tie bar 2 using the band body 5 having flexibility. Therefore, the detection is performed by the band body 5 regardless of the cross-sectional shape and diameter of the tie bar 2. The sensor 3 can be easily attached to the tie bar 2. Further, the pressure applied by the detection sensor 3 to the tie bar 2 can be adjusted according to the tightening amount of the adjusting screw 12 and the pressure applied by the detection sensor 3 to the tie bar 2 can be confirmed by the indicator 7. The sensor 3 can be pressed against the tie bar 2, and highly accurate detection is possible. As a result, when the strain of the tie bar 2 is continuously detected with the detection sensor 3 attached to the tie bar 2, the pressure applied by the detection sensor 3 to the tie bar 2 may decrease due to oil leakage or the like, but the indicator 7 Thus, the pressure applied by the detection sensor 3 to the tie bar 2 can be confirmed, so that the pressure applied by the detection sensor 3 to the tie bar 2 can always be maintained in an appropriate state.

  FIG. 5 shows a second embodiment of the detection apparatus according to the present invention, where parts having the same functions as those in the first embodiment are denoted by the same reference numerals, description of overlapping parts is omitted, and only different parts are shown. explain.

  In the above-described embodiment, an example in which the pressurizing tube 10 is incorporated in the holder 4 has been described. However, in this embodiment, an indicator that displays the pressure applied to the detection sensor 3 and the detection sensor 3 that contacts the tie bar 2 on the holder 4. 7 and the holder 4 and the pressure tube 20 are configured separately. Further, in the present embodiment, a pressure supply means 21 for supplying a fluid or gas into the pressure tube 20 to expand the pressure tube 20 is provided, and the pressure of the fluid or gas supplied from the pressure supply means 21 is provided. Is adjusted to a constant pressure by a pressure adjusting means 22 such as a pressure piston provided at the mouth of the pressure tube 20 and supplied to the pressure tube 20, and the pressure tube 20 expands. The detection sensor 3 incorporated in the holder 4 is pressed against the diver 2 by the expanded pressure tube 20.

  In the present embodiment configured as described above, first, the detection sensor 3 provided in the holder 4 is brought into contact with the measurement portion of the tie bar 2, and the pressure tube 20 is overlaid on the surface of the holder 4. The band body 5 is wound around the tie bar 2 via 20. In this embodiment, as shown in FIG. 4, two detection sensors 3 are set on the tie bar 2, and two pressurizing tubes 20 a for adjustment are further arranged between the detection sensors 3. Then, the band body 5 is wound around the four pressure tubes 20 and 20a including the pressure tube 20a, and is pulled through the slit 6a of the buckle 6 formed at one end of the band body 5, whereby the band body 5 is The detection sensor 3 is temporarily fixed to the tie bar 2 by being connected in an annular shape. And the detection sensor 3 arrange | positioned on the surface side of the holder 4 by supplying a fluid or gas in the four pressurization tubes 20 and 20a by the pressurization supply means 21, and expanding each pressurization tube 20 and 20a. Is pressed by the pressurizing tube 20, and the detection sensor 3 pressurizes the tie bar 2. Since the pressing force of the tie bar 2 to the tie bar 2 is displayed on the indicator 7 incorporated in the holder 4, the pressing force of the detection sensor 3 disposed in close contact with the tie bar 2 by the indicator 7 as in the first embodiment. Therefore, when the detection sensor 3 is set on the tie bar 2, the tie bar 2 can be contacted with the most appropriate pressure, and even if the pressure of the detection sensor 3 on the tie bar 2 is changed, it is easily corrected. be able to. Further, in this embodiment, the detection sensor 3 is pressed against the tie bar 2 by supplying fluid or gas into the four pressure tubes 20 and 20a by the pressure supply means 21 to inflate the pressure tubes 20 and 20a. Therefore, since the fluid or gas can be supplied to the pressurizing tubes 20 and 20a with a constant pressure by the pressurizing supply means 21, it is easy to adjust the pressurizing force of the detection sensor 4 that contacts the tie bar 2.

  As described above, in this embodiment, the pressurizing force of the detection sensor 4 contacting the tie bar 2 is increased by supplying a fluid or gas into the pressure tube 20 by the pressure supply means 21 and expanding the pressure tube 20. Since adjustment is possible, the pressure applied by the detection sensor 3 to the tie bar 2 can always be maintained in an appropriate state as in the first embodiment.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to each said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, an example is shown in which a detection sensor is attached to a tie bar of an injection molding machine as a measurement target, and distortion applied to the tie bar is measured. However, the present invention can be applied to various measurement apparatuses other than measuring distortion. . In addition, although an example in which two sets of detection sensors are attached to the measurement object is shown, the number of detection sensors is not limited. Further, the shape and structure of the holder are not limited to the above embodiment, and may be selected as appropriate.

It is a top view shown in the use condition of the measuring device which shows Example 1 of the present invention. It is explanatory drawing of a band body as above. FIG. 2 (a) is a plan sectional view, FIG. 2 (b) is a front view, FIG. 2 (c) is a side sectional view, and FIG. 2 (d) is a side view. It is a top view shown in the use condition of the measuring device which shows Example 2 of the present invention. It is explanatory drawing which shows the outline of a pressurization tube and a pressurization supply means same as the above.

Explanation of symbols

1 Measuring device 2 Tie bar (measurement object)
3 Detection Sensor 4 Holder 5 Band Body 6 Buckle 7 Indicator (Pressure Display Means)
10, 10a, 20 Pressurizing tube 11 Press plate 12 Adjustment screw 21 Pressure supply means

Claims (5)

  In a measurement apparatus that performs various measurements on a measurement object by bringing a detection sensor into contact with the measurement object, a holder that holds the detection sensor, a band body that attaches the holder to the measurement object, and the measurement object And a pressurizing adjustment means for adjusting the pressure of the detection sensor to be brought into contact with the measurement object via the pressurizing tube. A measuring device.   2. The measuring apparatus according to claim 1, further comprising a pressure display means for displaying a pressure applied by the detection sensor to the object to be measured.   The band body has flexibility, and a buckle portion having a slit is provided at one end of the band body, and the detection sensor is brought into close contact with the measurement object by pulling the other end of the band through the slit of the buckle portion. 3. The measuring apparatus according to claim 1, wherein the holder is attached to the object to be measured.   The pressure tube, the pressure adjusting means, and the pressure display means are incorporated into the holder to form a unit, and the pressure adjusting means is slidably provided in the holder; and This pressure plate is composed of an adjustment screw that slides in and out of contact with the pressure tube. The adjustment screw is turned and tightened, and the pressure tube is compressed by the pressure plate, thereby detecting the object to be measured. The measuring apparatus according to claim 1, wherein the measuring apparatus is configured to adjust a pressing force of the sensor.   The pressurizing adjustment means is composed of a pressurizing supply means for supplying a fluid or gas to the inside of the pressurizing tube, and the pressurizing tube is expanded by the pressurizing supply means to detect the sensor to be measured. The measuring apparatus according to claim 1, wherein the measuring apparatus is configured to adjust a pressing force.

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