JPS643481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to a fan using synthetic resin bones, and particularly to a type of fan that does not require edge wrapping of the peripheral frame of the fan.

(Prior art and its problems) Usually, the periphery of a fan is covered with a band paper to form the edge wrapping part, but since this edge wrapping work requires skill, if this edge wrapping work is unnecessary, To clarify, there is already one disclosed in Publication of Utility Model Publication No. 59-8583.

As shown in Fig. 10, this device employs a synthetic resin frame in which the tips of the supporting rods 2 and 2 groups are connected by a peripheral frame 3, and the outer periphery of the covering paper 4 and 5 attached to this frame is The outer peripheral edge portions 41 and 51 of these covering papers are bonded together to reach the outer periphery of the peripheral frame 3.

As shown in FIG. 11, the outer periphery of this fan is composed of the part covering the peripheral frame 3 and the outer periphery, so that in terms of appearance, the outer periphery consisting of these two parts is different from that of the conventional fan. Moreover, since the outer periphery becomes a bonding part between the covering papers 4 and 5, the periphery of these covering papers becomes difficult to peel off. Therefore, the outer periphery is difficult to peel off and has a hem-like appearance, so that no hem-wrapping is required.

However, with this fan, the outermost circumference of the fan is
As mentioned above, since the covering paper is double pasted, and because this area is extremely small, it is strong, and the end surface remains a cut surface, which is dangerous. .

(Technical Issues) The purpose of the present invention is to solve these problems, create an appearance that eliminates the need for edge wrapping, and also ensure the safety of the periphery of the fan. The technical problem is to ensure that the cut end of the paper is surrounded by a peripheral frame.

The technical means of the present invention designed to solve the above problems is as follows: The peripheral frame 3 connecting the support rod groups is located at the outermost periphery, and its outline matches the completed shape of the fan. A thin tongue piece 31 protruding inward is provided over the entire center of the inner peripheral surface of the peripheral frame 3, and covering papers 4 and 5 punched in advance to match the inner peripheral shape of the peripheral frame 3 are inscribed in the peripheral frame 3. Then, the opposing portions of the covering papers 4 and 5 are brought into a bonded state.

(Operation) The above technical means of the present invention operates as follows.

Each of the support rods in the group of support rods extends radially from one end of the handle, and its tip is continuous with the inner circumferential surface of the peripheral frame 3. Thin tongue pieces 31 are uniformly protruded along the peripheral frame 3 between the continuous parts.

Covering papers 4, 5 are pasted on both the upper and lower surfaces of this group of support rods, and the shape of these covering papers 4, 5 matches the inner peripheral shape of the peripheral frame 3, so the covering papers 4, 5 The periphery of the frame 3 is entirely surrounded by the peripheral frame 3, and in the space between the supporting rods, the covering papers 4 and 5 are joined together and integrated.
is adhered to the bone.

Also, regarding the peripheral edges of the covering papers 4 and 5, a thin tongue piece 31 extending from the inner circumferential surface of the peripheral frame 3 is inserted into the joint of the peripheral edges of these covering papers 4 and 5. Therefore, even if a gap occurs between the peripheral edges of the covering papers 4 and 5 and the inner circumferential surface of the peripheral frame 3, this gap is closed by the thin tongue piece 31.

Furthermore, since the thickness of the covering papers 4 and 5 is usually sufficiently thinner than that of the peripheral frame 3, in the cross section of the peripheral edge of the fan, the covering papers 4 and 5 are within the thickness direction of the peripheral frame 3. 5 will be ruled. Therefore, this peripheral frame 3 exhibits a function of protecting the peripheral edges of the covering papers 4 and 5, and has an appearance similar to that of a conventional edge wrapping part.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

The outermost periphery of the fan is a synthetic resin outer frame,
Moreover, since this outer peripheral frame is integrated with the support rod group,
It has improved strength while ensuring the flexibility required for a fan, and an overhang on the inner circumferential side of the peripheral frame 3 is provided between the peripheral edges of the covering papers 4 and 5 attached to the support rod group. Since the thin tongue piece 31 is inserted,
The unsightliness caused by a gap between the inner peripheral side of the peripheral frame 3 and the peripheral edges of the covering papers 4 and 5 is eliminated.

Further, since the outer peripheral edge joint portion of the covering paper is surrounded by the peripheral edge frame 3, it is possible to prevent a situation in which this portion comes into contact with others and peeling progresses from this portion.

When the covering paper is joined to the peripheral frame, wrinkles may occur on the surface of the covering paper or partial peeling may occur due to differences in thermal expansion or hygroscopicity. According to the present invention, such inconvenience does not occur. This is because since the covering paper and the peripheral frame are not joined, the covering paper can be deformed independently from the peripheral frame.

(Example) Hereinafter, an example of the present invention will be described using an example in which the covering papers 4 and 5 are attached by welding.

In this embodiment, bones having the shape shown in FIG. 1 are used, and by injection molding of synthetic resin, a handle 1, an outer peripheral base frame 11 connected to one end of the handle, and a peripheral base frame 11 of this outer peripheral base frame 11 are formed by injection molding of synthetic resin. The peripheral frame 3 that continues to the tip side and the connecting rod 12 that is installed in an arc shape between both ends of the outer peripheral base frame and are integrated with the bases of the support rods 2, 2 are each integrally molded. . Furthermore, although polypropylene resin is used as the material due to its cost and elasticity, it is also possible to use other resin materials.

One of the covering papers 4 and 5 is a laminated paper having a heat-welding layer 42 made of a thermoplastic resin such as vinyl chloride resin or polypropylene resin on the inner surface, and the other covering paper 4 does not have a heat-welding layer 42. Ordinary paper or aluminum foil sheets are used.

As shown in FIG. 2, these covering papers are punched out in advance into a shape that is inscribed in the connecting rod 12 and the peripheral frame 3, but the positions of the arcuate sides 41, 51 corresponding to the connecting rod 12 are on the tip side with respect to this connecting rod. When the covering papers 4, 5 are inscribed in the peripheral frame 3, a certain gap is created between the arcuate sides 41, 51 and the connecting rod 12.

In this embodiment, as a temporary fixing method, an adhesive is used as shown in FIG. Partially glue to the support rods 2 and 2 groups. During this temporary fixing, the peripheral edges of the covering papers 4 and 5 and the peripheral frame 3 are aligned.

The cover paper temporarily fixed in this manner is inserted between the heated elastic plates 8 and 9 as shown in FIG. When pressed and this pressed state is maintained for a certain period of time, as shown in FIG.
is melted and welded to the inner surface of the other coated paper. Thereafter, when the pressing plate 10 is returned to its original position and the bone is taken out, the covering papers 4 and 5 are adhered to appropriate positions within the peripheral frame 3.
The fan is completed.

Incidentally, if the thin tongue piece 31 is made to protrude from the inner circumferential side of the peripheral frame 3 between the support rods 2 and 2, and the peripheral edges of the covering papers 4 and 5 overlap with this thin tongue piece, the peripheral frame Even if there is variation between the inner circumference shape of the cover paper 3 and the outer circumference shape of the covering paper, or even if there is variation in the temporary fixing positions of the cover papers 4 and 5, the outer circumference of the cover paper and the peripheral frame 3
There will be no gap between the front and back sides. (See Figure 6) Next, as a method for temporarily securing the covering paper, as shown in Figure 7, a portion of the space between the support rods 2 and 2 is pressed in several places with claws B and B heated to a predetermined temperature. Alternatively, as shown in FIGS. 8 and 9, bag-shaped portions 32, 32 are formed at both ends of the peripheral frame 3, and a covering paper 4 is attached to the bag-shaped portions as shown in FIG. , 5 can also be positioned by inserting the corner portions A from the front and back. It is also possible to combine the latter method and the former method, and in this case, this bag-shaped portion 3
Only one point other than 2 and 32 needs to be bonded or welded between the covering papers.

[Brief explanation of drawings]

Fig. 1 is a plan view of the bone used in the embodiment of the present invention, Fig. 2 is a perspective view of the covering paper, Fig. 3 is a sectional view of the main part with the covering paper temporarily fixed, and Fig. 4 is the covering paper. FIG. 5 is a sectional view of the main part after pasting, FIG. 6 is a partial perspective view showing another example of the peripheral frame 3, and FIGS. 7 to 9 are temporary fixing steps. Explanatory drawings of other embodiments, FIG. 10, and FIG. 11 are explanatory drawings of conventional examples. Paper, 42... Heat welding layer, 5... Covered paper.

Claims (1)

[Claims] 1. Position the peripheral frame 3 that connects the support rod groups at the outermost periphery, and match its outline to the completed shape of the fan;
The peripheral frame 3 is provided with a thin tongue piece 31 projecting inward over the entire center of the inner circumferential surface of the peripheral frame 3, and covered papers 4 and 5 punched in advance to match the inner peripheral shape of the peripheral frame 3 are attached to the peripheral frame 3. A fan in which the facing portions of the covering papers 4 and 5 are bonded to each other by being inscribed and pasted on the paper.