JPH0351083Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a screw with a built-in washer in which a spring washer and a plain washer are incorporated in the neck between the head and the leg of the screw, in which the washer holds the screw in a predetermined position. The present invention relates to a device for correcting the position of the object.

[Conventional technology]

In general, when manufacturing screws with built-in washers, when shipping them as products, it is necessary to check whether the quality of these screws satisfies predetermined standards. Maintaining quality. In particular, the work of selecting the leg length of the screw is carried out by supporting the washer 3 with the shoot rail 1, arranging a plurality of rows of emitters 100 and receivers 200 facing each other as shown in FIG. Leg length is sorted without contact, but washer 3
While it is possible to adequately check the leg length of screws 2 that do not incorporate washers, such quality checks cannot be performed sufficiently for screws with built-in washers due to the influence of the washers, and it is necessary to check the quality by visual inspection by the operator. The current situation is what is happening.

[Problem that the invention attempts to solve]

In this way, in the sorting device in which the emitter and the receiver are arranged facing each other and are used to determine the acceptability of the leg length, the screws and washers are not always fitted in the predetermined positions. For example, as shown in Figure 5, there is a gap between the screw head bearing surface and the washer, and sometimes, as shown in Figures 6 and 7, a flat washer is incorporated into the screw. However, spring washers may not be incorporated, and when such items are sorted out automatically, the leg length will be longer than the specified dimension, especially if this flat washer is incorporated in the neck of the screw. It is determined that it is defective from
As shown in Fig. 7, when this flat washer is engaged with the screw thread of the leg, the leg length coincidentally matches the predetermined dimension, and this is determined to be a good product.
Alternatively, defective products may be mistakenly determined as non-defective products, resulting in inaccurate sorting work. On the other hand, when a worker visually assembles a screw and a washer, the worker needs to be highly skilled and is likely to become fatigued. In addition, this visual inspection of parts does not have sufficient reliability and processing capacity is low, so there are problems such as an increasing demand for a sorting device compatible with recent high-speed manufacturing equipment.

The present invention was devised for the purpose of solving the above-mentioned problems and providing an apparatus that can operate reliably and perform processing at relatively high speed.

[Means for solving problems]

The present invention has a neck 2 between a head 2a and a leg 2b.
Screw washer assembly screw 2 with washer 3 assembled into head 2
A plurality of press rods 10 that move up and down in a direction perpendicular to the shoot rail 1 are provided directly above the shoot rail 1 which is arranged and supplied while supporting the legs 2b in a hanging state with the leg portions 2b at the top, and on the upper part of the press rods 10, It rotatably supports a cam roller 21 that is acted on by a rotating cam 20, and the lower tip thereof is connected to the press rod 10.
The pressing rod 10 is repeatedly moved up and down by an operating means constituted by a lever 14 which is in contact with the lever 14 and whose other end is swingably supported by a support shaft 13.

[Effect]

When the screws with built-in washers 2 are aligned and supplied with the leg portions 2b hanging down on the inclined or straight vibrating shoot rail 1, a plurality of washer-installed screws 2 are arranged in advance directly above the shoot rail 1 so as to move up and down independently. The book pressing rod 10 operates. At this time,
When the washer 3 is properly assembled into the neck 2c, the press rod 10 does not come into contact with the head 2a of the screw 2, but the washer 3 engages with the thread of the leg 2b, and this washer 3 and the head bearing surface, the pressing rod 10 is pressed against the head 2a of the screw 2.
The washer 3 is assembled into the neck portion 2c of the screw 2. In this way, the press rods 10 are moved up and down independently by their operating means, so even if the screws 2 are aligned and fed on the shoot rail 1 continuously or discontinuously, the heads 2a of the screws 2 are If there is a gap between the washer 3 and the washer 3, the washer 3 is completely assembled into the neck portion 2c of all the washer-installed screws 2 because they are acted on by one of the pressing rods 10.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In Figures 1 and 2, 1
is placed almost horizontally, and screw 2 is caused by continuous slight vibration.
This is a shoot rail that feeds the washer-installed screws 2 forward in alignment with the head 2a facing upward and the leg 2b hanging down.
Pressure rods 10 are arranged directly above the shoot rail 1 in a direction that stands upright therefrom. In this embodiment, four pressure rods are arranged in parallel along the shoot rail 1, and two or more pressure rods can be arranged as needed. Bye. These pressing rods 10 are inserted through a guide block 11 arranged across the above-mentioned shoot rail 1 so as to be able to move up and down, and the pressing rods 10 are elastically biased upward by a first spring 12. . An abutting portion 14a of a lever 14, one end of which is swingably attached to the guide block 11 about a support shaft 13, is in contact with the upper part of the pressing rod 10, and the other end of the lever 14 is in contact with A guide shaft 15 embedded in the guide block 11 is inserted through the guide block 11. A second spring 17 is wound between the spring bearing 16 on the upper part of the guide shaft 15 and the lever 14.
This second spring 17 elastically biases the lever 14 more strongly than the first spring 12.

A rotatable cam roller 21 is pivotally supported on the lever 14, and the cam roller 21 runs along the outer peripheral cam surface of a rotary cam 20 fixed to a cam shaft 22 rotatably supported by the guide block 11. , has a rolling configuration, and this rotating cam 20
As a result, the lever 14 is swung. Further, a pulley 23 is fixed to the camshaft 22 to transmit rotation from a motor (not shown).

Next, the operation of this embodiment will be explained. Place the four press rods 10 directly above the shoot rail 1 in advance, move the levers 14 up and down by swinging them using the rotary cam 20, and then move the screw 2 with the washer 3 installed onto the shoot rail 1. When the screws 2 are fed, as shown in FIG. 3, the screws 2 are aligned and fed forward with the head portion 2a facing upward and the leg portion 2b hanging down. As a result, when this screw 2 reaches below the press rod 10, the press rod 10 comes into contact with the head 2a of the screw 2, which has a gap between the head bearing surface of the screw 2 and the washer 3. A washer 3 is assembled into the neck portion 2c of the screw 2. On the other hand, if a product with the washer 3 properly assembled is supplied during this operation, the lowering limit of the press rod 10 is already set in advance when the washer 3 is properly assembled into the screw 2, and the head 2a Since the press rod 10 is set at a position where there is a slight gap between the screws 2 and the screws 2, the press rod 10 does not come into contact with the head 2a of the screw 2, and the screws 2 are aligned and fed forward on the shoot rail 1. Furthermore, this pressing rod 10
Since the timing of the lifting and lowering operations is slightly different on the shoot rail 1, for example, when the first press rod 10 is rising, the screw 2 passes through and there is a gap between the head 2a and the washer 3. Even if the head 2 remains as it is, the head 2 is
Since a is pressed, the washers 3 of all of the washer-installed screws 2 are accurately incorporated into the screws 2.

In this embodiment, the rotary cam 20 and the lever 14 actuated by the rotary cam 20 are shown as operating means for operating the press rod 10, but instead of this, for example, the rotary cam 20 may be mounted on the upper part of the press rod 10. The cam surface of this rotary cam 20 directly touches the pressing rod 10.
It may be made to act on the upper end of the . Further, in this embodiment, the screw rail 1 is given a slight vibration to feed the screw 2 forward.
Alternatively, the shoot rail 1 may be tilted so that the screw 2 slides down due to its own weight.

[Effect of idea]

As is clear from the above embodiments, the present invention has a washer-incorporated screw 2 with a washer 3 installed in the neck 2c between the head 2a and the leg 2b, with the head 2a facing upward and the leg 2b facing upward. A plurality of press rods 10 that move up and down in the direction perpendicular to the shoot rail 1 are provided directly above the shoot rail 1 that is aligned and supplied while being supported in a hanging state, and a cam roller 21 that is actuated by a rotating cam 20 is provided on the upper part of the press rod 10. The press rod 10 is repeatedly raised and lowered by an operating means constituted by a lever 14 which is rotatably supported and whose lower tip abuts the press rod 10 and whose other end is swingably supported by a support shaft 13. It was designed so that

For this reason, in a sorting device that places a projector and a receiver facing each other and uses these to determine the acceptability of the leg length, the screws and washers are always fitted in the predetermined positions, so the screws can be securely inserted. It becomes possible to determine pass/fail, and the processing capacity is significantly improved, making it fully compatible with high-speed manufacturing equipment. In addition, because the operator no longer needs to visually assemble the screws and washers, the operator's skill level is also eliminated, and worker fatigue is eliminated. Effects can be obtained. Moreover, if the pressing rod is directly actuated by the rotating cam, the structure becomes simple, and a compact device with reliable operation can be provided.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional front view of the main parts of the present invention, Figure 2 is a plan view of Figure 1, Figure 3 is an operation diagram showing the operation of the present invention, and Figure 4 is a screw with a washer installed correctly. FIGS. 5 to 7 are cross-sectional views of main parts showing a conventional example of determining the leg length of a screw in a state where a washer is not properly assembled. 1 is the shoot rail, 2 is the screw, 2a is the head,
2b is a leg, 2c is a neck, 3 is a washer, 10 is a pressing rod, 11 is a guide block, 12 is a first spring, 1
3 is a support shaft, 14 is a lever, 14a is a contact portion, 15
1 is a guide shaft, 16 is a spring holder, 17 is a second spring, 2
0 is a rotating cam, 21 is a cam roller, 22 is a camshaft, and 23 is a pulley.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A washer-installed screw 2 with a washer 3 installed in the neck 2c between the head 2a and the leg 2b with the head 2a facing upward and the leg 2b hanging down. A press rod 10 that moves up and down in a direction perpendicular to the shoot rail 1 is provided directly above the shoot rail 1 that supports and supplies the feed in alignment, and an operating means is attached to the upper part of the press rod 10 to repeatedly move it up and down. Straightening device with built-in washer. 2. The washer-integrated orthodontic device according to claim 1, wherein a plurality of pressing rods are arranged directly above the shoot rail 1. 3. The operating means is a lever 14 which rotatably supports a cam roller 21 operated by a rotary cam 20, and whose other end is swingably supported by a support shaft 13 so that the lower end of the lever abuts the pressing rod 10.
A straightening device incorporating a washer according to claim 1 or 2 of the utility model registration claim, characterized in that: 4. The washer-integrated orthodontic device according to claim 1 or 2, wherein the operating means is a rotary cam 20 having a cam surface that acts on the upper end of the pressing rod 10.