JPH075003U - Metal gasket step measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable easy and accurate measurement of the step h of the diaphragm bead. [Structure] The flat portion 1 on the lower side is strongly pressed toward a reference surface 6 by a pressing piece 17. In this state, the lower end of the probe 19 of the dial gauge 18 is brought into contact with the upper surface of the flat portion 2 on the higher side. From the display of the dial gauge 18, the step h
Ask for.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The metal gasket level difference measuring device according to the present invention is used for measuring the dimension of a level difference part called a diaphragm bead formed on a metal gasket used as a cylinder head gasket or an exhaust manifold gasket. It

[0002]

[Prior art]

 A metal gasket used as a cylinder head gasket or the like is provided with a step called a diaphragm bead in order to increase the contact pressure around the hole where the sealing property should be secured. As shown in FIG. 4 showing an embodiment of the present invention, such a step is formed by connecting a pair of inner and outer flat portions 1 and 2 which are concentrically provided with each other by an inclined portion 3. Such a step is elastically crushed when the metal gasket is sandwiched between the upper surface of the cylinder block and the lower surface of the cylinder head, for example, to increase the contact pressure of the portion and maintain the sealing property. Fulfill.

The height h of the step of the metal gasket having such a role is regulated so that a desired sealing property can be obtained by a prescribed tightening force (tightening force of a bolt for connecting the surfaces holding the metal gasket). Although it is important to obtain it, it is impossible to measure the step h with a simple tool such as a caliper or a micrometer.

Therefore, conventionally, the surface shape of the stepped portion is measured by a contact-type shape measuring instrument called a contracer or an optical type shape measuring instrument called a surf measure, and a signal representing this surface shape is calculated by a computer. The above step h was obtained by analysis.

[0005]

[Problems to be solved by the device]

 However, the conventional method for measuring a step difference as described above requires a large-scale device, not only increases the cost and time for measurement, but also cannot always obtain a reliable measurement value. The metal gasket step measuring device of the present invention has been devised in view of such circumstances, and its purpose is to make it possible to perform step measurement easily and reliably with a relatively simple device. .

[0006]

[Means for Solving the Problems]

 The metal gasket level difference measuring device of the present invention has a base having a flat reference surface on the upper surface, a vertical support pillar at one corner of the upper surface of the base, and a support vertically movable on the support pillar. A slider, a support arm whose base end is fixed to the slider, and a support arm fixed to the tip of the support arm, the lower end surface of which can be brought into contact with the reference surface as the slider descends. Includes the retainer, a probe that is vertically movable from the retainer at a position that is horizontally offset from the retainer, and the lower end of which is abuttable to the reference surface. And a comparator that determines the amount of displacement of this probe.

[0007]

[Action]

 When measuring the level difference of the metal gasket by the level difference measuring apparatus of the metal gasket of the present invention configured as described above, it is performed as follows. First, with the slider raised, a metal gasket whose step is to be measured is placed on the reference surface of the upper surface of the base. Next, the slider is lowered, and the upper surface of the lower flat portion of the pair of flat portions adjacent to each other via the inclined portion is pressed toward the reference plane by the pressing piece. At the same time, as the slider descends, the lower end of the probe hits the upper surface of the flat part on the higher side. In this state, the step is obtained from the measured value of the comparator.

[0008]

【Example】

 1 to 5 show an embodiment of the present invention. The shapes shown in FIGS. 4 to 5 showing the measurement state are different from the shapes shown in FIGS. 1 to 3 showing a specific configuration for simplification. First, based on FIGS. 1 to 3, a specific configuration of the metal gasket level difference measuring device of the present invention will be described.

The base 4 has a sufficient weight in order to prevent the base 4 from being accidentally displaced during measurement. A flat plate 5 is fixed on the upper surface of the base 4, and the upper surface of the flat plate 5 serves as a flat reference surface 6. A pillar 7 is vertically erected at a corner of the upper surface of the base 4 which is separated from the flat plate 5. A slider 8 is supported on the column 7 so as to be able to move up and down.

This slider 8 made of cast iron or the like in a substantially U-shape is supported by the column 7 by inserting the column 7 into circular holes formed at both upper and lower ends thereof. A support bracket 9 is fixed to the middle of the column 7 between the upper side 10 and the lower side 11 of the slider 8. A compression spring 12 is provided between the support bracket 9 and the lower side portion 11. Therefore, the slider 8 is displaced downward by the elastic force of the compression spring 12 in addition to the weight of each member supported by the slider 8 in its own weight.

Further, an intermediate portion of the raising lever 13 near the base end is pivotally supported on the side surface of the front end portion of the support bracket 9 (referred to as the end portion near the reference surface 6; the left end portion in FIG. 1). The upper end of the link arm 14 is pivotally supported by the base end of the pulling lever 13, and the lower end of the link arm 14 is pivotally supported by the lower side 11. Therefore, when the tip end portion (the left end portion in FIG. 1) of the pull-up lever 13 is pushed downward, the slider 8 is pulled up against the dead weight, the weight of each member, and the elasticity of the compression spring 12. .

As described above, the base end portion (right end portion in FIG. 1) of the support arm 15 is fixed to the lower front end portion of the slider 8 that moves up and down based on the operation of the pulling lever 13. The support beam 16 is fixed to the lower surface of the tip of the support arm 15 in the horizontal direction (front and back directions in FIGS. 1 and 2 and left and right directions in FIG. 3). Then, a restraining piece 17 is fixed to one end portion (front end portion in FIGS. 1 and 2 and right end portion in FIG. 3) in the length direction on the lower surface of the support beam 16. The lower end surface 17a of the restraining piece 17 is a flat surface parallel to the reference surface 6. Then, as the slider 8 descends, the lower end surface 17a is in contact with the reference surface 6 by itself.

A lower portion of a dial gauge 18, which is a kind of comparator, is fixed to the middle portion of the support beam 16 in the length direction. Therefore, the tracing stylus 19 of the dial gauge 18 is supported so as to be able to move up and down with respect to the support beam 16, and the lower end thereof can come into contact with the reference surface 6. A weight 21 is provided at an upper end portion of the probe 19 which is projected above the display portion 20 of the dial gauge 18. Therefore, the above-mentioned tracing stylus 19 is pressed downward by this weight 21.

Further, in the illustrated embodiment, a through hole 22 extending in the vertical direction is formed at the other end of the support beam 16 in the length direction, and a stud 23 is inserted into the through hole 22. A nut 24 is screwed into a portion of the upper end of the stud 23 protruding from the upper surface of the support beam 16 to prevent the stud 23 from falling out of the through hole 22. An elastic plate 25 is provided at the lower end of the stud 23, and a compression spring 26 is provided between the upper surface of the elastic plate 25 and the support beam 16 to elastically press the elastic plate 25 downward. is doing. The elasticity of the compression spring 26 is made sufficiently smaller than the elasticity of the step portion of the metal gasket to be measured.

When measuring the step of the metal gasket with the step measuring device of the metal gasket of the present invention configured as described above, it is performed as follows. Before starting the measurement work, the zero point of the dial gauge 18 is adjusted as shown in FIG. That is, without placing an object to be measured on the reference surface 6, the slider 8 is lowered to bring the lower end surface 17a of the restraining piece 17 and the lower end portion of the probe 19 into contact with the reference surface 6 at the same time. Contact. In this state, the display of the dial gauge 18 is set to zero by pressing a reset button provided on the display unit 20 or the like.

After measuring the zero point, in order to measure the step of the metal gasket, first, the slider 8 is raised by pulling down the tip of the pulling lever 13. Then, with the slider 8 kept raised, a metal gasket whose step is to be measured is placed on the reference surface 6 of the flat plate 5. Next, the slider 8 is gradually lowered by gradually raising the front end portion of the pulling lever 13, and as shown in FIG. 4, a pair of flat portions 1 adjacent to each other via the inclined portion 3 are provided. The upper surface of the flat portion 1 on the lower side of 2 is strongly pressed toward the reference plane 6 by the pressing piece 17. At the same time, as the slider 8 descends, the lower end of the probe 19 abuts on the upper surface of the flat portion 2 on the higher side. Further, although not shown in FIG. 4, the elastic pressure plate 25 lightly suppresses a portion of the upper surface of the flat portion 2 which is slightly displaced from the contact portion of the probe 19. In this state, by reading the display on the dial gauge 18, the step h existing between the flat portions 1 and 2 can be obtained.

The reason why the flat portion 1 is lightly held down by the elastic pressure plate 25 is to prevent the posture of the metal gasket to be measured from varying and to obtain a stable and highly reproducible measurement result.

[0018]

[Effect of device]

 The metal gasket level difference measuring device of the present invention is constructed and operates as described above, but the level difference of the diaphragm bead formed on the metal gasket can be easily and accurately measured, and a high quality metal gasket Can contribute to manufacturing.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of part A in FIG.

FIG. 3 is a diagram viewed from the left side of FIG.

FIG. 4 is a schematic cross-sectional view showing a measurement state.

FIG. 5 is a schematic cross-sectional view showing a state during zero point adjustment.

[Explanation of symbols]

 1, 2 Flat part 3 Inclined part 4 Base 5 Flat plate 6 Reference surface 7 Strut 8 Slider 9 Support bracket 10 Upper side 11 Lower side 12 Compression spring 13 Lifting lever 14 Link arm 15 Support arm 16 Support beam 17 Rest piece 17a Lower end surface 18 dial gauge 19 stylus 20 display 21 weight 22 through hole 23 stud 24 nut 25 pressure plate 26 compression spring

Claims (2)

[Scope of utility model registration request] 1. A base having a flat reference surface on its upper surface, and a column vertically erected at one corner of the upper surface of the base,
A slider supported by the column so as to be able to move up and down, a support arm having its base end fixed to the slider, and a support arm fixed to the tip of the support arm, and the lower end surface of the slider being lowered as the slider descends. A pressing piece that can freely come into contact with the surface, and a measuring element that is supported by the tip of the supporting arm so as to be able to move up and down at a position horizontally displaced from the pressing piece, and whose lower end can come into contact with the reference surface. A device for measuring a level difference of a metal gasket, which is configured to include the probe, and which comprises a comparator for obtaining the amount of displacement of the probe. 2. An elastic plate which is movable up and down with respect to the tip and is provided with a predetermined load downward at a position opposite to the restraining piece with the tip of the support arm interposed therebetween. The step measuring device for a metal gasket according to claim 1.