JPS60152901A - Inspecting machine for hexagon socket bolt - Google Patents

Abstract

PURPOSE:To make it possible to perform simultaneous measurement of the diameter and the depth of a hole, by making it possible to protrude the lower end of a depth measuring piece from an inner-diameter measuring piece, which is fixed to the lower end of a shaft tube that can be moved up and down, contacting a core shaft in the shaft tube with the depth measuring piece, and measuring the moving distances of both measuring pieces. CONSTITUTION:A hollow shaft tube 3 is supported between a pair of bearings 2 and 2 of a main body 1 of an apparatus so that the tube can be moved up and down. An inner-diameter measuring piece 5 for a hexagon socket bolt 6 is attached to the lower end of the shaft tube 3 in a concentric manner. A depth measuring piece 8 is slidably inserted into a needle hole 9, which is provided in the direction of the central axis of the measuring piece 5. The lower end of the measuring piece 8 is protruded out of the hole 9. A coupling 24 is mounted on a coupling 23, which is fixed to the upper end of the shaft tube 3. The lower end of a core shaft 10, which is slidably inserted in the shaft tube 3, is contacted with the head part of the measuring piece 8. The upper end of the core shaft 10 is inserted into the coupling 23. Detecting gages 29 and 30 for the inner diameter and the depth detect the vertical moving distances of the shaft tube 3 and the core shaft 10 through the coupling 29 and 30.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hexagon socket head bolt inspection machine that simultaneously and efficiently inspects the hole diameter and inner bottom depth of a hexagon socket head bolt.

Generally, the formation of a hexagonal hole in a hexagonal socket bolt relies on forging press processing using a punch. By the way, in this case, as the punch is used repeatedly, it gradually wears down and becomes smaller in diameter, so the diameter of the hexagonal hole of the manufactured bolt may be smaller than the specified size, or the inner bottom depth may be shallow. things happen.

For this reason, it has become necessary to conduct dimension inspection from a quality control perspective, and in particular, dimension inspection is required to guarantee standard dimensions in order to display JIS, but this inspection has generally been performed on the inner bottom of a hole with a diameter of 2. Since the depth and depth were measured separately using measuring instruments such as micrometers, it was time-consuming and inefficient.

In view of such oil purity, it is an object of the present invention to simultaneously and efficiently inspect the hole diameter and depth of a hexagon socket head bolt. is supported directly and vertically movably on the main body of the apparatus, and an inner diameter measuring element having an outer diameter that approximately matches the inner diameter of the hexagon socket head bolt to be inspected is connected to the lower end of the shaft cylinder via a flexible joint. The needle hole is extended in the direction of the central axis of the inner diameter measuring tip, and a needle-like depth measuring tip is inserted into the needle hole with its lower end protruding an appropriate length from the lower end of the needle hole. The core shaft is slidably inserted into the shaft cylinder, and the lower end of the core shaft is brought into contact with the head of the depth measuring element, and the core shaft is slidably inserted into the shaft cylinder. A hexagonal member is connected to the vertical moving means and is connected to an inner diameter detection gauge that detects the vertical movement distance of the shaft cylinder, and to the upper end of the core shaft is connected a depth detection gauge that detects the vertical movement distance of the core shaft. The present invention provides a bolt inspection machine with holes.

An embodiment of the present invention will be described below with reference to the drawings, in which a pair of upper and lower bearings 2.2 are protruded from one side of the device main body 1.
A hollow shaft cylinder 3 is supported between both bearings with a linear bushing 4 interposed therebetween so that it can move vertically and vertically. Reference numeral 5 denotes an inner diameter measuring element for determining the hole diameter of the hexagon socket head cap bolt 6 to be inspected, and the inner diameter measuring element 5 has an outer diameter dimension whose lower end outer shape approximately matches the hole diameter dimension of the hexagon socket head bolt 6. It is formed into a hexagonal shape having a diameter, and is concentrically attached to the lower end of the 4-inch cylinder 3 via a flexible joint 7, which is made up of two inner and outer coil springs with different diameters. Reference numeral 8 denotes a depth measuring element for determining the inner bottom depth of the hole of the hexagon socket head bolt 6, and the depth measuring element 8 has a needle hole 9 bored in the direction of the central axis of the inner diameter measuring element 5. The needle is slidably inserted into the needle hole from above, and its lower end protrudes from the lower end of the needle hole 9 by an appropriate length. Also, there is a core inside the hollow part of the shaft tube 3! 11o
is slidably inserted to bring the lower end surface of the skeleton shaft into contact with the head of the depth measuring element 80. A coupling 11 is fixed to the outer surface of the shaft cylinder 3 at approximately the middle height U, and on the other hand, the device main body 1
A bracket ν bent downward into a hook shape is provided on one side, and one end of a swinging rod is pivotally attached to the bent lower edge of the bracket via a pivot 14, and the other end of the swinging rod is The end is pivotally connected to the coupling 11 via a pivot 15. A locking pin 16 is provided protrudingly between the two pivots 14 and 15 of the swinging rod 13, and a locking pin 17 is provided protrudingly from one side of the device main body 1 located below the locking pin. and both locking bins 16.
Stretch a tension spring between 17 and 17. Furthermore, the device main body 1
A motor bracket 19 is provided protruding from one side, and a cam 4 is fixed to the tip of a motor powder drive shaft 21 fixed horizontally to the motor bracket so as to be rotatable in a vertical plane. is in contact with the lower edge of the swinging rod rib, and as the cam rotates, the swinging rod U swings in the vertical direction about the pivot 14 as a fulcrum, causing the shaft cylinder 3 to reciprocate up and down.

A short hollow cylindrical coupling having a through hole through which the core axis lO can pass in the central axis direction is fixed to the upper end of the shaft cylinder 3 so as to be coaxial with the shaft cylinder 3, and the coupling A short shaft-shaped coupling U is placed on the upper end surface of the ring U. Then, a bracket 5 is installed on the device main body 1, and a hanging rod η is fixed to the lower surface of the vertically upper part of the shaft tube 3 in front of the flat single-shaped holder protruding from the upper end of the bracket. The upper end of the spring is held in the bottom of the concave chamber formed on the lower end surface, and the lower end of the spring is fixed to the upper surface of the coupling part, and the elasticity of the spring pushes the coupling U onto the coupling n. do. Note that when the core shaft 10 slightly pushes up the lower end of the depth probe 8,
The length is such that it protrudes from the upper end opening of the coupling n.

Additionally, there is an inner diameter detection gauge that detects the vertical movement distance of the shaft cylinder 3, and a depth detection gauge that detects the vertical movement distance of the core shaft 10. The inner diameter detection gauge 9 and the depth detection gauge (9
) are installed near both ends in front of the holder. Then, brackets 31 and 31 are vertically installed on the lower surface of the holder 9, which is located 1d between the rain detection gauge 3D and the hanging rod η, and arms 31 and 83 are attached to the lower edges of both brackets, respectively, approximately at the center thereof. Axial position.

one end of the one arm is loosely moored to the coupling part, and the other end of the arm protrudes from the lower end of the inner diameter detection gauge 4. The tentacle faces the eastern lower hall, one end of the wing of the other arm is held loosely in the coupling, and the other end of the arm protrudes from the lower end of the depth detection gauge (equipment). Place it directly below the crying tentacle. In addition, feathers, 3
Reference numeral 8 denotes a presser pin inserted downwardly on the outside of the bracket 31.31 in order to eliminate vertical wobbling of the arms 33, and the presser pin is supported by a compression spring 39. It is urged downward by a9 and presses the arm 32, 33 with its lower end.

Chrysanthemum is a motor installed on one side of the device main body l in order to rotate the inner diameter measuring element 5 around its axial direction.A pulley 41 is fixed to the rotating shaft of the motor, and the shaft cylinder 3
A pulley holder is loosely fitted around the outer periphery of the drawing pulley 41,
A conductive belt is stretched between 42 and 42, and a thrust bearing is inserted on the outer periphery of the shaft cylinder 3 at the bottom of the pulley 4, and a cylindrical cover stone is attached to the outer periphery of the shaft cylinder 3 on the pulley 4. Then insert the thrust bearing inside the upper edge of the cylindrical cover. A bushing 47 is inserted into the cylindrical cover 6 on the outer periphery of the shaft cylinder 3, and a slip key is inserted into the key groove carved on the outer peripheral surface of the shaft cylinder 3. A compression spring group is inserted between the upper surface of the bushing C and the lower surface of the thrust bearing, and the one rib 47 is friction-bonded to the pulley C by the pressing force of the compression spring. The motor a is designed to alternately rotate forward and backward at a low speed of about 10 revolutions/minute.

5] shows a base for setting the hexagon socket head bolt 6.

In the hexagon socket head bolt inspection machine configured as described above, the hexagon socket head bolt 6 is set in advance at a predetermined position on the base 51, and the motor is applied by turning on a switch (not shown). The driven cam γ rotates 1- from the position shown by the solid line in Figure 1.
1/! It stops at the rotated position rO'''. During this time, the swinging lever is pulled by the tension spring 18, so it rotates clockwise in the figure using the pivot 14 as a fulcrum, lowering the shaft cylinder 3. Therefore, Inner diameter gauge head 5 and depth gauge head 8
descends. Next, the motor sushi shaft cylinder 3 rotates. If the hole diameter of the bolt 6 satisfies the lower limit of the allowable size, the inner diameter gauge head 5 will be inserted into the hole of the bolt 6 when the bolt 6 and the inner diameter gauge head 5 are in phase with each other. At the same time, the depth probe 8 is also inserted into the hole 5.
, its lower end abuts against the inner bottom of the hole of the bolt 6. Following the movement of the inner diameter measuring element 6 and the depth measuring element 8, the arm &, whose one end is moored to the coupling Yu at the upper end of the shaft cylinder 3, rotates around the pivot and the other end. Push up the fourth contact of the inner diameter detection gauge with
Since one end of the arm is moored to the coupling U, the arm rotates around the pivot, and the other end pushes up the contact W of the depth detection gauge. Then, the acceptability of the hole diameter and depth of the bolt 6 is determined based on electrical signals from the inner diameter detection gauge 4 and the depth detection gauge 4.

Note that when the inner diameter gage element 5 fits into the bolt 6 while the shaft cylinder 3 is being rotated by the motor shaft, the inner diameter gage element 5 rotates inside the bolt 6 than the force of rotating the shaft cylinder 3 by the pulley. The force that prevents this is stronger and the pulley wheel idles, and the rotation of the shaft cylinder 3 is stopped, so there is no problem with the inspection.

As explained in the above embodiments, according to the hexagon socket bolt inspection machine of the present invention, the hole diameter and inner bottom depth of the hexagon socket can be inspected at the same time, so the inspection effort can be halved.
Furthermore, since it is a mechanical inspection, labor can be significantly reduced, inspection efficiency can be significantly increased, and it is also economically superior.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially sectional front view, and FIG. 2 is a sectional view taken along the line X--X in FIG. 7. 1...Device main body, 3...Shaft tube, 5...Inner diameter gauge head, 6...Hexagon socket head bolt, 7...Flexible joint, 8...Depth Measuring head, 9...needle hole,
10...Core shaft, 2g...Inner diameter detection gauge, 30
...Depth detection gauge. Patent author Hirano Sekkei Co., Ltd.

Claims (1)

[Claims] A hollow shaft cylinder is supported perpendicularly to the main body of the apparatus so as to be movable up and down, and an inner diameter measuring element having an outer diameter that approximately matches the inner diameter of the hexagon socket head bolt to be inspected is inserted through the flexible joint. It is attached concentrically to the lower end of the axial cylinder, a needle hole is drilled in the direction of the center axis of the inner diameter measuring element, and a needle-shaped depth measuring element is inserted into the needle hole so that its lower end is properly inserted from the lower end of the needle hole. The core shaft is slidably inserted into the shaft station so that the lower end of the core shaft comes into contact with the head of the depth measuring head, and the shaft The cylinder is connected to its vertical movement means and also connected to an inner diameter detection gauge for detecting the vertical movement distance of the shaft cylinder, and a depth detection gauge at the upper end of the core shaft for detecting the vertical movement distance of the core shaft. A hexagon socket head bolt inspection machine characterized by a connected gauge.