JP2579181B2 - Continuous measuring device for small parts - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a continuous measuring device for continuously and precisely measuring small components.

[Conventional technology]

When measuring the small component, for example, a sliding piece 52 having a U-shaped cross section that slides along a guide bar 50 via a ball bearing 51 as shown in FIG.
The pitch P between the outer sides of the bearing insertion portions 53, 54 is usually required to be precisely measured in units of microns, and therefore, measurement is generally performed manually. Therefore, when measuring a large amount of a measurement object, the measurement is troublesome and inefficient.

[Problems to be solved by the invention]

For this reason, measurement automation is desired, but there are problems that the configuration is complicated and expensive, the versatility is poor, and it takes time and effort to accurately measure the object to be measured.

[Means for solving the problem]

In view of the above, the present invention has a general purpose, and aims to enable quick and accurate measurement. The feature of the present invention is that one side of a measurement surface facing an object to be measured is provided. A fixed reference piece that abuts, a movable measurement piece that abuts on the measurement surface on the other side, a pressing mechanism that presses and transfers the movable measurement piece with a predetermined pressure, a measurement member that measures a transfer distance of the movable measurement piece, and an object to be measured And a support plate for supporting the pressure mechanism, wherein the pressing mechanism is a differential piston having rods having different diameters on both sides of the piston body, and the object to be measured supplied by the movable measurement piece is transferred to the fixed measurement piece. The position of the movable measuring piece is measured by a measuring member.

[Action]

The stop position of the movable measurement piece that moves with the workpiece relative to the fixed reference piece is measured by the measurement member, and the above-described pitch P is calculated. In addition, since the differential piston is used as the pressing mechanism for the movable measuring piece, the pressing force can be kept constant and small, and the impact on the object can be reduced as much as possible.

〔Example〕

1 to 5 show an embodiment of the present invention. The continuous measuring device 1 of the present embodiment measures the pitch P between the bearing insertion portions 53 and 54 (hereinafter referred to as measuring surfaces) of the object 52 to be measured. It has a piece 2 and a movable measurement piece 3 facing the other measurement surface 54. The fixed reference piece 2 has two balls 4,
4 and is attached to the frame F via the support bracket 5.

The movable measuring piece 3 has one ball 6 which is in contact with the other measuring surface 54 and is connected to the sliding cylinder 7. Each of these balls 4,6
Have the same diameter or a slightly smaller diameter as the above-mentioned ball bearing 51, and are arranged in an isosceles triangular shape with the base between the balls 4 and 4. Thus, the pitch P can be accurately measured when the movable measurement piece 3 is pressed outward as described later.

The sliding cylinder 7 is slidably mounted on guide shafts 8, 8 which are horizontally mounted at an interval in the vertical direction. In order to reduce sliding resistance as much as possible, for example, a sliding bearing 9 is provided.
Mounted via.

A pressing mechanism 10 is provided on one side of the sliding cylinder 7 and a measuring member is provided on the other side. The pressing mechanism 10 is constituted by a differential piston, and includes rods 12 and 13 having different diameters (provided that 13> 12) on both sides of the piston main body 11,
When pressurized air is supplied from the air supply hole 15 drilled into the cylinder 14, the piston body 11 is moved by the difference in pressure receiving area on both sides of the piston body 11 to press and shift the sliding cylinder 7. In this case, when the movable measurement piece 3 is pressed against the measurement surface 54 of the measured object 52 with an excessive pressure, an error occurs in the measured value and there is a problem in durability. Preferably, the respective diameters of both rods 12, 13 are appropriately selected.

The measuring member 20 emits the measured value as an electric signal,
For example, using a differential transformer, the tracing stylus 21 is pressed by a pressing spring to urge the movable measuring piece 3 toward the fixed reference piece 2.

Reference numeral 30 denotes a support mechanism for supporting the DUT 52. A movable plate 32 having a DUT support plate 31 attached to the tip is mounted on a mounting table 33, and the support plate 31 is moved to a retracted position (first position) by an air cylinder 34. 1
The position of the return spring 35 is normally maintained at a support position (solid line position in FIG. 1) for supporting the object to be measured by the contraction force of the spring 35.

The support plate 31 is provided with a ball 36 for movably supporting the object 52 to be measured. The ball 36 preferably feeds compressed air through an air passage 37 to provide buoyancy, and supports the object 52 to be measured with as little sliding resistance as possible.

Reference numeral 40 denotes a discharge guide member, which includes a chute 42 attached by a bracket 41, a delivery conveyor 43 mounted below the chute, and a receiving plate 44 opposed to the chute 42 at an appropriate interval. The measured object is transferred to the next step by the conveyor 43. In the above configuration, the movable measurement piece 3 is located close to the fixed reference piece 2 side, and the support plate 31 is located at the position where the measured object 52 is supported.

In this state, the measured object 52 is supplied onto the support plate 31 by an appropriate handling mechanism. Then, the pressing mechanism 10 is actuated to move the movable measuring piece 3 in the expanding direction, and accordingly, the object to be measured 52 also moves and is supported by the three balls 4, 4 and 6. Is blocked. This position is detected by the measuring member 20, and the pitch P between the measuring surfaces is calculated by calculation.

After the measurement is completed, the air cylinder 34 of the support mechanism 30 is operated to move the support plate 31 to the retracted position (the position shown by the chain line in FIG. 1). At the same time, by moving the movable measurement piece 3 to the fixed reference piece 2 side, the measured object 52 falls on the conveyor 43 by its own weight, and is transferred to the next step by the conveyor.

〔The invention's effect〕

According to the present invention, the workpiece to be supplied is placed on a support plate and the movable workpiece is moved to support the workpiece in cooperation with the fixed reference piece. Since the transfer amount is regulated and the transfer amount is measured by the measuring member, the measurement can be performed quickly and accurately. At this time, the movable measurement piece press mechanism is a differential piston having rods with different diameters on both sides of the piston body, so that the movable measurement piece moves at a constant gentle speed and contacts the workpiece. Can be made as small as possible, and the measurement error can be reduced. In addition, there is an effect that the measurement object can be discharged quickly, that is, the measurement object can be replaced quickly by shifting the support plate to the retracted position.

[Brief description of the drawings]

1 to 5 relate to an embodiment of the present invention. FIG. 1 is an overall plan view partially cut away, FIG. 2 is a front view, and FIG. , FIG. 4 is a partially cutaway front view, FIG. 5 is a cross-sectional view taken along the line II in FIG. 1, FIG. 6 is a vertical cross-sectional view of the DUT, and FIG. It is the front view. 1 is a continuous measuring device, 2 is a fixed reference piece, 3 is a movable measuring piece,
10 is a pressing mechanism, 20 is a measuring member, 31 is a support plate, 52 is an object to be measured, and 53 and 54 are measuring surfaces.

Claims (1)

(57) [Claims] 1. A fixed reference piece abutting on one side of a measurement surface facing an object to be measured, a movable measurement piece abutting on a measurement surface on the other side, and a pressing mechanism for pressing and moving the movable measurement piece at a predetermined pressure. And a supporting member for supporting the object to be measured and a measuring member for measuring the transition distance of the movable measuring piece, wherein the pressing mechanism is a differential piston having rods having different diameters on both sides of the piston body, and is movable. A continuous measuring device for small parts, characterized in that an object to be measured supplied by a measuring piece is moved and locked on a fixed measuring piece, and a position of a movable measuring piece is measured by a measuring member.