JPH0348139Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to an easily assembled open reel for winding a tape body such as a carrier tape mainly for storing small electronic components.

[Conventional technology]

Conventionally, as shown in FIG. 4, for example, as shown in FIG. 4, an assembly type open reel for winding a tape body such as a carrier tape has a central marking on both sides of a plastic hub 21 having a spool shaft insertion hole 20 in the center. There is one in which a circular cardboard or plastic flange 23 having a hole 22 of the same diameter as the insertion hole 20 of the hub is integrally joined by means such as double-sided adhesive or heat fusion (hot melt). In addition, as shown in FIG. 5, a support shaft portion 31 having a spool shaft insertion hole 30 at the center of the bottomed cylinder, and a plastic hub 33 having a slit 32 formed on the outer circumferential surface into which the tip of the tape body is inserted. on both sides,
A flange 36 made of cardboard is provided with a hole 35 having the same shape as the insertion hole 34 of the hub 33 in the center of the circular plate.
Similar to the above, some are bonded using double-sided adhesive or hot melt. In addition, instead of using adhesive or hot melt as a means of joining the hub and flange, a locking pawl is provided protruding from the flange side, and a pawl locking hole into which the locking pawl fits is provided on the hub side. A method has been proposed in which the hub is fixed with a nail.

[Problem that the idea aims to solve]

However, in conventional hubs and flanges that are integrally bonded using double-sided adhesive or hot melt, the flanges bonded to both sides of the hub may become misaligned during use or storage. There were drawbacks such as the spool shaft not being able to be inserted, and the hub and flange sometimes separating completely. In addition, a method in which the hub and flange are joined by a fitting method is free from the problems of flange displacement and peeling, as is the case with adhesive or hot melt methods, but it is preferable because there is a risk that the tape body may get caught in the claws. Nakatsuta. This invention was developed in view of the problems of the conventional technology, and its purpose is to assemble a plastic hub and a plastic flange by fitting means, and to To provide an assembly type open reel which has no protrusions such as claws, has no fear of flange displacement or detachment, and can be assembled simply and quickly.

[Means to solve the problem]

This idea consists of an open reel hub consisting of a sealed hollow cylindrical part made of plastic, and a plastic flange fitted onto the cylindrical parts protruding from both sides of the hollow cylindrical part. in,
A hollow cylindrical body having a spool shaft hole in the center has a flange-fitting cylindrical part having a diameter smaller than that of the cylindrical body, and a flange-fitting cylindrical part is protruded from both sides of the hollow cylindrical body having a spool shaft hole in the center so as to form a sloped recess around the cylindrical part. The cylindrical part for flange fitting has an annular protrusion for engaging the flange on the outer periphery and a locking part for preventing rotation of the flange on the outer end surface, and the flange has a cylindrical part for flange fitting protruding from the hub at the center thereof. a donut-shaped flange locking portion having an inner diameter that allows the inner end to fit into the sloped recess, and a donut-shaped flange locking portion that fits into the flange locking step portion of the hub. It has a rotation prevention piece, and the donut-shaped flange locking part fits outwardly into the flange-fitting cylindrical part of the hub, and the inner end edge of the donut-shaped flange-locking part fits and engages with the flange-fitting protrusion. The gist of the reel is an assembly type open reel having a structure in which a detent piece provided on the flange side fits into a detent piece locking step provided on the hub side.

[Effect]

The plastic hub and plastic flange have a donut-shaped flange locking part provided at the center of the flange that fits into and engages with the flange-engaging annular protrusion of the flange-fitting cylindrical part provided on both sides of the hub. Therefore, it will not come off in the axial direction of the hub hole. By fitting the anti-rotation piece provided on the flange side into the locking step provided on the outer end surface of the flange fitting cylindrical portion on the hub side, rotation of the flange externally fitted to the hub is prevented, and the flange and The hub rotates as a unit. The anti-rotation piece provided on the flange side can be formed by extending the reinforcing piece of the flange. The flange locking step provided on the hub side is
It may be formed by notching the outer end surface of the flange-fitting cylindrical portion of the hub, and the flange-side detent piece may be fitted into this notch.

【Example】

Fig. 1 is an exploded perspective view showing an example of the easily assembled open reel of this invention, Fig. 2 is an enlarged front view showing the center of the reel in the assembled state, and Fig. 3 is the same as Fig. 2. - It is a vertical side view on the line. The hub 1 consists of a closed hollow cylindrical body having a shaft hole 2 in the center for fitting the spool shaft, and a cylindrical part 3 for fitting a flange having a smaller diameter than the diameter of the cylindrical body on both sides.
is formed. The flange-fitting cylindrical portion 3 is provided by recessing the hollow cylindrical body 1 inward to protrude, and forms a sloped recess 4 around the cylindrical portion 3. A flange-engaging annular projection 5 is provided on the outer periphery of the flange-fitting cylindrical portion 3, and a locking step 6 for preventing the flange from rotating is formed on the outer end surface. The locking steps 6 for preventing flange rotation are opposed to each other in order to ensure a more reliable anti-rotation effect. On the other hand, the flange 8 has a hole 9 in its center having an inner diameter that can be externally fitted into the flange fitting cylindrical portion 3 provided on the hub 1, and the inner end of the hole 9 is connected to a sloped recess on the hub side. It has a donut-shaped flange locking part 10 that is recessed into a shape that can be fitted into the ring. The donut-shaped flange locking portion 10 is provided with a flange locking piece 11 that fits into a flange locking step 6 formed on the outer end surface of the flange fitting cylindrical portion 3 of the hub 1 . This flange stopper piece 11 can be formed by extending the flange reinforcing member 12. 13 is a pin hole for reel rotation. When assembling the hub 1 and flange 8, the donut-shaped flange locking portion 1 provided at the center of the flange
The flange fitting cylindrical parts 3 provided on both sides of the hub 1 are fitted into the holes 9 of 0, and the slanted recess 4 on the hub side
Donut-shaped flange locking part 10 on the inner flange side
The inner end of the flange is engaged with the flange-engaging annular projection 5 and fixed. At the same time, the flange stopper piece 11 is fitted into the stopper step 6. As a result, the hub 1 and the flange 8 are completely integrated, and the donut-shaped flange locking part 10 of the flange 8 is locked to the flange-engaging annular projection 5 on the hub side and does not come off, and furthermore, the flange side Since the anti-rotation piece 11 is fitted into the anti-rotation locking step 6 on the hub side, the flange 8 alone will not rotate idly.

[Effect of the idea]

Since this invention is configured as described above, it produces the following effects. Since the hub and flange can be assembled by fitting means without using any adhesive or the like, the reel can be assembled easily and quickly. There is no possibility that the hub and flange will shift or come off during use, transportation, or storage. Since the rotation preventing means is provided, the flange fitted onto the hub will not rotate inadvertently. Since the flange has a concave fitting portion with the hub, the fitting portions can be stored one on top of the other and can be easily taken out. Both the hub and flange are made of plastic, so they are strong and will not deform or break. The hub and flange are relatively simple in shape and can be molded by means such as injection molding, so they are not expensive.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an example of the easily assembled open reel of this invention. FIG. 2 is an enlarged front view showing the central part of the reel in an assembled state. Figure 3 is Figure 2-
FIG. FIGS. 4 and 5 are exploded perspective views showing a conventional assembly type open reel. DESCRIPTION OF SYMBOLS 1... Hub, 2... Shaft hole, 3... Cylindrical part for flange fitting, 4... Recessed part with slope, 5... Annular projection for flange engagement, 6... Locking step part for preventing flange rotation, 8... Flange, 9... Hole, 10...Doughnut-shaped flange locking part, 11...Flange rotation prevention piece.

Claims (1)

[Scope of utility model registration request] This is an open reel in which plastic flanges are removably attached to both sides of a plastic hub, and the hub is made of a closed hollow cylindrical body with a shaft hole in the center, and the cylindrical body is attached to both sides of the reel. A cylindrical part for flange fitting with a smaller diameter is protruded so as to form a recess with an inclined surface around the cylindrical part, and the cylindrical part for flange fitting has an annular protrusion for flange engagement on the outer periphery and an annular projection for flange engagement on the outer end surface. The flange has a locking stepped portion for preventing rotation of the flange, and the flange has an inner diameter in the center thereof that can be externally fitted onto a flange fitting cylindrical portion protruding from the hub, and the inner end portion is provided with the slope. It has a donut-shaped flange locking portion shaped to fit into the recess, and a rotation stopper that fits into the flange locking step portion of the hub, and the donut-shaped flange locking portion is attached to the flange of the hub. The inner end edge of the donut-shaped flange locking part is fitted onto the cylindrical part for fitting, and the inner edge of the donut-shaped flange locking part is fitted into and engaged with the annular protrusion for flange engagement, and the rotation prevention piece provided on the flange side is fitted around the rotation stopper provided on the hub side. A simple assembly type open reel characterized by having a structure that fits into a stopper piece locking step.