JPS62785Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic length measuring and sorting machine that automatically measures and sorts a piece to be measured into lengths that are below the lower limit of the dimensional tolerance, within the tolerance range, and above the upper limit of the tolerance.

Conventionally, the dimension inspection of parts has mainly been carried out by sampling method, but it is possible that some parts with defective parts may be mixed in even among the lots that pass the inspection, but recently automatic assembly machines With the adoption of this technology, it has become inevitable that all parts must be defect-free. In order to satisfy this requirement, it is inefficient to carry out a complete inspection using a gauge or the like, so we provide a mechanical device that automatically measures and sorts all the lengths.

One embodiment of the present invention will be described below with reference to the drawings. The automatic length measuring and sorting machine of the present invention includes a parts feeder 1 and a chute 3 for supplying parts, and the supplied parts A are spaced at equal intervals around the outer circumference. Hold the gripping groove 5 in the palm of your hand and insert the gripping plate 9 and the gripping anvil 1.
1 and 12, a length measuring and sorting device in cooperation with the rotating disk 4, the pinch receiving plate 9, and the pinch anvils 11 and 12, which are conveyed between 1 and 12, and a discharge chute that separates and discharges the sorted pieces. It is composed of three blocks, 18, 19, and 20.

The board 6 is erected on the front surface of the output shaft side of the deceleration plate 21 with the output shaft protruding horizontally on the machine table by being screwed with a bolt through a spacer, and a support plate 9 is provided at the bottom.
is screwed to the substrate 6, and a supply chute 3 is erected in parallel to the substrate 6 via a support arm 7 on the upper part thereof,
A rotary disk 4 is disposed on the front surface of the substrate 6 and is fixed to an output shaft of a reducer 21 that projects horizontally through a through hole formed in the substrate 6.

The shape of the length measuring piece in this example is cylindrical, and
Since the purpose is to measure and sort the length, first, the pieces A that advance horizontally in one line from the parts feeder 1 pass through the conduit 2 and are stacked horizontally in the supply chute 3 that stands vertically. In order to ensure that the lowest piece always comes into contact with the outer periphery of the rotating disk, the supply chute 3 is provided with a piece passing groove with a square cross section, and is attached to the base plate 6 with a support arm 7 so that it is vertically mounted. The distance between the lowermost end surface of the supply chute 3 and the apex of the outer peripheral edge of the rotating disk 4 is set to be smaller than the diameter of the piece. Therefore, the piece A located at the bottom of the supply chute 3 is connected to the rotary disk 4.
When the receiving groove 5 carved on the outer periphery of the rotary disk 4 rotates directly below the supply chute 3, it is held in the receiving groove 5,
The rotation of the rotary disk 4 transports it to the measurement position. The rotating disk 4 is used to transport the pieces A from the supply chute 3 to a measuring and sorting device, and is fixed to the output shaft of a reducer 21, and the width of the disk is equal to the length to be measured. It is a circular plate that is formed somewhat smaller than the length of piece A, and has receiving grooves 5 divided into a plurality of equal parts on its outer peripheral edge for accommodating piece A. 9 and anvil 11,1
This is a device that measures the length of a piece while moving it. The piece A being transported is in the receiving groove 5.
In order to prevent the substrate 6 from falling off, a semi-circular cover 8 is attached to the substrate 6 so as to cover the outer peripheral edge of the rotating disk from the side of the supply chute 3 to the side of the pinching anvil 11 in accordance with the direction of rotation of the rotating disk 4. is screwed on.

Next, we will discuss the mechanism for measuring and sorting pieces A at the same time.As shown in Figs. A pinch receiving plate 9 screwed to the base plate 6 is disposed opposite to the rear surface of the rotary disk 4 so as to sandwich it therebetween, and two pinch anvils 1 are disposed opposite to the front surface.
1 and 12 adjust the clamping anvil 11 to the lower limit value in order to enable measurement and sorting by dividing the pieces into dimensions below the lower limit value of the dimensional tolerance and those above the tolerance range and upper limit value,
The pinching anvils 12 are adjusted to the upper limit value and arranged in parallel. Since the receiving groove 5 of the rotating disk follows a circular orbit, it is superfinished on the surface of the sandwiching receiving plate 9 so that it is located on the left and right of the point where the passing locus of the receiving groove intersects with the center vertical line of the rotating disk 4. A floor metal 10 made of cemented carbide is buried therein. Two clamping anvils 11 and 1 work together with the floor metal 10 to clamp the piece A, measure its length, and sort it.
2 is held by a support arm 13 at a position facing the front surface of the rotary disk 4 and facing the floor metal 10.
The structure of the clamping anvils 11 and 12 is such that a radial shaft 14, which has splines on the left and right sides and which fits into grooved through holes 13' drilled in parallel in the support arm 13, does not rotate but moves straight back and forth, and the front part A terminal 15 made of cemented carbide having a superfinished surface in contact with the piece A is glued to the tip, and a radial shaft 14 is attached between the terminal 15 and the front surface of the support arm 13.
A compression spring 16 is interposed through the shaft, and the rear end of the diameter shaft 14 protrudes from the rear surface of the support arm 13 and is fitted with a precision screw, into which a dial knob 17 with a graduation of 1/100 mm is screwed, so that the terminal is always constant. It is a structure that is pulled with a tension of .

The measurement surface of the terminal 15 of the clamping anvil 11 has an inclined surface formed at the entrance so that the length-measured piece A can easily enter. The terminal 15 is supported by the spring force of a compression spring 16 and moved back and forth by adjusting the dial knob 17 to set a predetermined dimension value. In order to make the spring compression force of the compression spring 16
Set to 400-600 grams.

Since the first clamping anvil 11 and the second clamping anvil 12 are arranged in parallel with each other according to the direction of rotation of the rotating disk 4, a piece is placed at the lower value of the rotating disc at the position of the clamping anvil 11. The first discharge chute 18 discharges only the pieces A that are below the lower limit of the dimensional tolerance, the second discharge chute 19 discharges the pieces within the tolerance range at the position of the second clamping anvil 12, and the second discharge chute 19 discharges the pieces A that are within the tolerance range. A discharge mechanism is constructed by arranging a third discharge chute 20 for discharging pieces exceeding the upper limit of the dimensional tolerance.

Next, to describe the effects resulting from the above configuration, the lowermost piece in the supply chute is always located in contact with the outer peripheral edge of the rotating disk, and as the rotating disk rotates, it moves on the circumference. They are transported one after another while being stored and held in the receiving grooves cut into equal parts, but the first one does not fall off on the way due to the protection of the semi-circular cover arranged in the direction of rotation of the rotating disk.
It is transported to the position of the pinching anvil. The dimensional distance between the front surface of the terminal of the first clamping anvil and the floor metal of the clamping plate is adjusted to the lower limit of the dimensional tolerance of the piece using a limit gauge such as a block gauge, and the terminals are also placed side by side. The second clamping anvil is set to the upper limit of the dimensional tolerance, so if the transported piece is below the dimensional tolerance, it will not contact the terminal of the first clamping anvil because it is short. position into the first discharge chute.
If the piece is within the dimensional tolerance range, the terminal 15 of the first clamping anvil will be pushed by piece A, as shown in Figure 5, and the terminal surface will retreat against the force of the compression spring, as shown by the two-dot chain line. Then, it reaches the position 15' and is conveyed to the second clamping anvil by passing through the terminal surface of the first clamping anvil while being clamped by the terminal and the floor metal.
Since the clamping anvil is set at the upper limit, the product falls into the second discharge chute without contacting the terminal at that position, and is selected as an acceptable product. At the same time as the terminal face retreats due to the clamping of the parts, the dial knob also retreats to the 17' position, creating a gap between it and the rear surface of the support arm that corresponds to the movement of the terminal, but it may be longer than the upper limit of the tolerance. If so, it is conveyed while being clamped by the terminal of the second clamping anvil, passes through the terminal surface of the second clamping anvil, and falls into the third discharge chute. In this way, it is possible to accurately measure and sort the length of parts into those that are below the dimensional tolerance, those that are within the dimensional tolerance range, and those that are greater than the dimensional tolerance, and in large quantities, into dimensions on the order of 1/100 mm. Therefore, it greatly contributes to reducing testing costs.

[Brief explanation of the drawing]

Figure 1 is a front view showing a series of mechanisms for supplying, length measuring, sorting and discharging of the present invention, Figure 2 is a side view, and Figure 3 is an enlarged front view showing the length measuring and sorting mechanisms. FIG. 4 is an enlarged side view including a partial sectional view. FIG. 5 is a plan view showing the length measuring action. Code 4... Rotating disc, 5... Receiving groove, 9... Pinching receiving plate, 10... Floor metal, 11, 12... Pinching anvil, 15... Terminal, 17... Dial knob, A... ...piece.

Claims (1)

[Scope of utility model registration request] A reducer 21 is placed on a machine stand with the output shaft horizontal, a board 6 is erected in front of the output shaft of the reducer, and a parts feeder 1 is disposed on the back of the reducer 21.
A supply chute 3 for horizontally stacking and accommodating the pieces A to be measured, which are conveyed through the conduit 2 from the base plate 6, is erected on the front surface of the substrate 6, and the lower end of the supply chute 3 is covered with the outer periphery close to it. A rotary disk 4 having a plurality of equally divided receiving grooves 5 on the outer periphery for gripping and rotationally conveying the side length piece A is fixed to the output shaft that can be horizontally projected through the base plate 6, A semicircular arc-shaped cover 8 that covers the outer peripheral edge of the rotating disk from the side surface of the supply chute 3 to the side surface of the sandwiching anvil 11 in the rotational direction of the rotating disk 4 is screwed to the substrate 6, and the rotating disk The lower outer peripheral side of 4 is sandwiched back and forth, and the sandwich receiving plate 9 is screwed to the lower part of the board, facing the rear face, and set to the lower and upper limits of the part dimension tolerance limit, facing the front face. 14
Two clamping anvils 11 and 12 each having a pressure spring 16 arranged thereon and capable of holding the length-measuring piece A are arranged in parallel, and the length-measuring piece A is divided and discharged at the lower part of the anvil. An automatic length measuring and sorting machine characterized in that discharge chutes 18, 19, and 20 are disposed.