JPH0246449B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a jig used in various industrial sectors in combination with a washer to film-wrap a nut used to connect a plurality of members. Specifically, it is possible to prevent the nut and washer from tilting during film packaging, and to smoothly and easily screw the object into the bolt while the film is still wrapped. This article relates to a jig for film packaging of nuts and washers.

(Prior art) Recently, nuts and washers have been integrated using film packaging to make them easier to handle during the distribution process.
A set of washers is commercially available and has been well received.

However, as shown in Figures 5 and 6, the jig used for film-wrapping the nut and the washer is such that the flat washer a is placed on a pedestal b, the holes d between the flat washer a and the spring washer c, The height of the positioning part f of the washer that fits into
c', and a positioning part i for the nut g that fits into the screw hole h of the nut g is provided on the positioning part f.

And positioning part f of flat washer a and spring washer c
When the nut g is supported by the positioning part i,
As shown in FIG. 6, the nut g rests directly on the high part of the spring washer c and comes into contact with it, and there is a considerable distance between it and the low part of the spring washer c.

(Problem to be Solved by the Invention) The conventional jig described above has the above-described configuration, and the nut g, washer a,
When packaging ``c'' and ``c'', the spring washer ``c''
At c′, it comes into close contact with the bottom surface of nut g, and
On the opposite side, an inclined gap is formed between the nut g and the nut g.

Therefore, the shrinkable film j is thermally contracted and its outer periphery starts to come into close contact with the circumferential surfaces of the washers a, c and the nut g, and both upper and lower ends are heated by the lower end surface of the washer a and the upper end surface of the nut g. When the spring is rolled inward due to contraction, the misaligned part of the spring washer c
Since the spring washer c and the nut g are in contact at c', the shrinkage of the film in the circumferential direction is regulated and the shrinkage stops quickly.

However, since there is an inclined gap between the spring washer c and the nut g on the side opposite to the contact part mentioned above,
While the shrinkage force of film j is acting, the film j continues to shrink in the circumferential direction, so the force pulls washer c toward nut g, and film j continues to shrink until the lower surface of nut g and the upper surface of washer c come into close contact. and its involvement is performed.

Therefore, as shown in FIG. 7, the nut g is packaged in an inclined manner on the washers a and c due to the inclined surface at the staggered portion c' of the spring washer c, so that the finished product is packaged with its screw hole h. corresponds to the threaded part of bolt k in a posture inclined with respect to the screw axis of bolt k passed through holes d and e of washers a and c, so the nut and washer set packaged in this state corresponds to the threaded part of nut g. Hole h with bolt k
Therefore, when using this product, either remove the film and separate nut g and washers a and c before screwing them together. Because the nut is discarded and another good product is used, it takes time to screw in the nut in various industrial sectors, and the incidence of defective products in processed packaging nuts increases, which increases costs. There was a problem.

The present invention uses a jig that ensures a gap between the misaligned portion of the spring washer and the nut so that they do not interfere with each other, and sets the gap so that the nut and washer do not come into close contact with each other until the film wrapping is completed. The screw hole of the wrapped nut is not tilted with respect to the hole of the washer, that is, it is placed on the same axis line, so that the appropriate posture is maintained, so that the wrapped nut can be screwed into the bolt easily and reliably. The purpose of the present invention is to provide a jig for film packaging of nuts and washers that can be used to package nuts and washers.

(Means for Solving the Problems) The means of the present invention for achieving the above-mentioned objects are as follows: (1) A pedestal for supporting a spring washer, and a hole protruding from the pedestal into which a hole of the spring washer is inserted. When the spring washer positioning part protrudes higher than the thickness of the staggered part of the spring washer, and the screw hole of the nut is inserted with the spring washer positioning part protruding concentrically onto the spring washer positioning part, the lower surface of the nut is supported. a nut positioning part having a locking step, when the spring washer is supported by the washer and the nut is supported by the locking step,
A jig for film packaging of nuts and washers, in which a space is provided between the upper surface of the spring washer and the lower surface of the nut so that the two do not interfere with each other.

(2) a pedestal that supports a flat washer, and when the hole of the spring washer that protrudes onto this washer and overlaps with the flat washer is inserted, the thickness of the staggered part of the spring washer A flat washer and a spring washer positioning part that protrude high, and when the flat washer and the spring washer positioning part are protruded concentrically and the threaded hole of the nut is inserted,
a nut positioning part having a locking step on which the lower surface of the nut is supported, and when the flat washer and the spring washer are supported on the washer and the nut is supported on the locking step, the A jig for film packaging of nuts and washers, in which a space is provided between the upper surface of the spring washer and the lower surface of the nut so that the two do not interfere with each other.

The structure is as follows.

(Function) The present invention achieves the following effects by the above-described configuration.

In the jig according to the present invention described above, the spring washer is inserted into its positioning part and placed on the pedestal, the nut is inserted into the positioning part of the nut that concentrically projects onto the positioning part, and the nut is inserted into the locking step part. When the lower edge of the nut is supported, the nut is held in a parallel state, and the height of the spring washer positioning part is formed higher than the thickness of the staggered part of the spring washer, so that the lower surface of the nut and the spring washer are A gap is formed between the staggered portion and the upper surface on the opposite side so that they do not interfere with each other.

For this reason, when a wrapping film is loosely fitted on the outside of the nut and spring washer, and this film is heated and contracted in the circumferential direction, the film will contract tightly to the circumferential surfaces of the nut and spring washer, and the upper and lower The ends curl inward, causing the upper and lower edges of the film to press the spring washer and nut axially inwardly.

However, since there is the above-mentioned space between the nut and the spring washer, if the dimensions of this space are set so that they do not come into contact with each other until the film has finished shrinking, the nut can Due to the above-mentioned inward pressure, the nut does not come into close contact with the top surface of the spring washer, so the nut does not tilt and remains almost parallel to the spring washer. It can be screwed into the screw hole smoothly and easily.

(Embodiment) Next, an embodiment of the nut/washer film packaging jig according to the present invention will be described based on the drawings.

The film packaging jig for nuts and washers according to the present invention is implemented as shown in Figs. As shown in Figure 2, a flat washer 3 is placed on top of the spring washer 6 for support, or as shown in Figure 4, a spring washer 6 is placed and supported. .

Reference numeral 4 denotes a washer positioning part which protrudes above the pedestal 1 and fits into the hole 5 of the flat washer 3 and the hole 7 of the spring washer 6 with almost no play, and its height is shown in Fig. 2. As shown in FIG. 4, the thickness of the spring washer 6 may be slightly higher than the thickness of the plain washer 3 plus the thickness of the staggered portion 6' of the spring washer 6. It is made to protrude slightly higher than the thickness of the staggered portion 6'.

The portion of the flat washer 3 into which the hole 5 is fitted is formed larger than the portion into which the hole 7 of the spring washer 6 is fitted by the difference in diameter between the two.

Reference numeral 9 denotes a nut positioning part which protrudes concentrically onto the washer positioning part 4 and into which the screw hole 11 of the nut 10 is inserted;
1 is inserted, the lower surface of the nut 10 is supported and held in a parallel state by a locking step 9a, which prevents the lower surface of the nut 10 and the upper surface of the spring washer 6 from interfering with each other. No = Interval 8
It is designed to ensure that

The gaps 8 are set so that they do not come into contact with each other until the shrinkage of the film 16, the dimensions of which will be described later, is completed.

Then, as shown in FIG. 2, a protrusion 12 formed concentrically and integrally with the washer positioning part 4 and provided at the lower part of the washer positioning part 4 is fitted into the recess 13 of the pedestal 1, and the pedestal 1 and the positioning part 4 are connected to each other. 9 are aligned and connected to the base 1 by screws 15 passed through holes 14 made in the centers of the positioning parts 4 and 9.

Reference numeral 16 denotes a packaging film, which is cylindrical and thinly molded from a heat-shrinkable synthetic resin material with a large shrinkage rate in the circumferential direction.As shown by the solid line in FIG. The diameter of the washer 3, 6 is longer than the overlapping dimension of the washer 3, 6 and the nut 10 by the winding allowance at both ends. The film 16 is in close contact with the outer periphery of the nut 10, and is wrapped around the upper surface of the washer 3 and the nut 10, so that the washers 3, 6 and the nut 10 are packaged together. As shown, two perforation lines 17, 17 are inserted, and a tearing knob 18 protruding to one end is provided between the perforation lines 17, 17.

Reference numeral 19 denotes a bolt which is screwed into the nut 10 through the flat washer 3 wrapped with a film 16 and the spring washer 6.

Using the jig shown in the above embodiment, the effect of film wrapping the nut 10, the spring washer 6, and the flat washer 3 will be explained.

Insert the flat washer 3 and spring washer 6 overlappingly into the washer positioning part 4 of the jig, place the flat washer 3 on the base 1 to support it, and insert the nut 10 into the nut positioning part 9 of the jig to engage it. When supported by the stop portion 9a, the height of the washer positioning portion 4 is set slightly higher than the sum of the thickness of the staggered portion 6' of the spring washer 6 and the thickness of the flat washer 3. Part 4
The upper edge protruded from the upper surface of the staggered portion 6' of the spring washer 6, and there was a gap 8 between the staggered portion 6' and the nut 10 that did not interfere with each other.

Therefore, a heat-shrinkable film 16 having a diameter slightly larger than that of the flat washer 3, which is the overlapping dimension of the three together with the winding allowance at both ends, is fitted onto the outside of the nut 10, the spring washer 6, and the flat washer 3. When contracted by heating generated by a known heating means,
Since the shrinkage rate of the film 16 in the circumferential direction is set to be high, the film 16 rapidly undergoes heat shrinkage in the circumferential direction and tightly adheres to the outer periphery of the flat washer 3, the spring washer 6, and the nut 10.

Then, both ends of the film 16 were rolled inward and wrapped around the end face of the nut 10 and the end face of the flat washer 3.

At this time, there is also an offset portion 6' of the spring washer 6 between the lower surface of the nut 10 and the upper surface of the spring washer 6.
As shown in FIG. 2, as mentioned above, there is a space 8 that does not interfere with each other, and this space 8 is
Since the nut 10 is set so that it remains slightly even after the end of the terminal No. 6 is wound up, the nut 10 resting on the upper end surface of the washer positioning part 4 is kept horizontally, as shown in FIG. As shown in the figure,
It was packaged parallel to flat washer 3.

When this packaged nut/washer set is passed from the plain washer 3 side to the bolt 19 for joining a steel frame column at a construction site, the axis of the bolt 19 and the axis of the nut 10 will align correctly and the nut 10 will be turned. The threaded hole 11 of the nut 10 naturally engaged with the tip of the bolt 19, and the nut 10 was screwed into the bolt 19 smoothly and reliably.

As mentioned above, when wrapping two items, the spring washer 6 and the nut 10, in a film instead of using the nut 10, the spring washer 6, and the flat washer 3, the spring The washer 6 and nut 10 are supported and wrapped with a shrink film 16, and the operation in this case is the same as that of the three-piece set described above, so a description thereof will be omitted.

(Effects of the Invention) In the nut/washer film packaging jig according to the present invention, when the wrapping film wraps the edges of the nut and washer due to contraction, the packaging film shrinks in the circumferential direction due to heating between the nut and the spring washer. The nut and washer do not interfere with each other until the process is completed.The nut and washer are supported by a jig and wrapped in a film in their natural state, and the wrapped nut and washer are kept parallel to each other. The bolt can be screwed into the set smoothly and easily.

Therefore, there is no occurrence of defective products that cannot be screwed in as in the past, improving yield, and the nut with washer is extremely convenient to use.

Since the edge of the nut or washer is wrapped evenly over the entire circumference by winding the end of the film, the appearance of the packaged product is good and there is no possibility of the nut falling out.

It has the following unique effects.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of implementation of a jig related to the present invention. FIG. 2 is a longitudinal sectional front view showing the state of use of the same as above. Figure 3 shows nuts packaged using the same jig as above.
FIG. 3 is a front view showing the setting of washers. FIG. 4 is a longitudinal sectional front view showing another example of the embodiment in use. FIG. 5 is a perspective view showing a conventional jig. FIG. 6 is a longitudinal sectional front view showing the state of use of the same as above. FIG. 7 is a front view showing a set of nuts and washers packaged using the same jig. In the figure, 1 is a base, 3 is a flat washer, 4 is a washer positioning part, 5 is a hole in the flat washer, 6 is a spring washer, 7 is its hole, 8 is a gap, 9 is a nut positioning part, 10
is a nut, and 11 is a screw hole.

Claims (1)

[Claims] 1. A pedestal that supports a spring washer, and a spring washer positioning portion that protrudes onto the pedestal and projects higher than the thickness of the staggered portion of the spring washer when the hole of the spring washer is inserted. and a nut positioning part having a locking stepped part on which the lower surface of the nut is supported when the nut is concentrically protruded onto the spring washer positioning part and the screw hole of the nut is inserted, When a spring washer is supported and the nut is supported by the locking stepped portion, a space is provided between the upper surface of the spring washer and the lower surface of the nut so that the two do not interfere with each other. Jig for film packaging of nuts and washers. 2. A pedestal that supports a flat washer, and a flat washer that protrudes above the pedestal and projects higher than the thickness of the staggered portion of the spring washer when the hole of the flat washer and the spring washer that overlaps with the pedestal are inserted. a spring washer positioning part; a nut positioning part having a locking step part on which the lower surface of the nut is supported when the flat washer and the screw hole of the nut are inserted so as to protrude concentrically onto the spring washer positioning part; When the flat washer and the spring washer are supported on the pedestal and the nut is supported on the locking step, there is no interference between the upper surface of the spring washer and the lower surface of the nut. A jig for film packaging of nuts and washers, which is characterized by interposing a gap between the nuts and washers.