JP3028408U - Embedded screw connection pair - Google Patents

Abstract

(57) Abstract: To provide an embedded screw-pair pair in which the recovery rate of a plastic material is increased, the damage rate of an injection molding machine is lowered, and the removal time is relatively short. An embedding nut (30) is embedded in one plastic member (40), and a bolt (60) inserted into the other plastic member (50) is inserted into the embedding nut (3).
0) by screwing on both plastic members (4
0, 50) in the embedded screw contact pair, a diameter-expanding convex edge (32) is formed at one end of the nut body (31) of the embedded nut (30), and the diameter-expanding convex edge (32) is formed. Connected and extended and slightly reduced in diameter, and project a suitable protrusion end (33),
In addition, the insertion hole (3
5) is opened, and a hand tool is inserted into the insertion hole (35) and rotated so that the embedded nut (30) can be removed from the one plastic member (40).

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an embedded screw contact pair, and more particularly to an embedded screw contact pair for connecting members by embedding a connecting element such as a bolt and a nut in a member.

[0002]

[Prior art]

 However, in general household appliances and pocket computers that are frequently disassembled and repaired, the embedded screw contact pair that connects both plastic molded members has a buried nut with a bolt hole embedded in one of the plastic members. As shown in FIG. 1 which is a side view and a top view of the embedded nut 10, the embedded nut 10 is knurled on the outer peripheral surface. Etc. to form a notch 11 and to provide a ring-shaped recessed groove 12 around the circumference of the middle part, and as shown in FIG. 2, the embedded nut 10 is put into a molding die and one plastic member 20 At the same time, the first plastic member 20 is injection-molded and immediately after that, the plastic member 20 is pushed into the notch 11 and the ring-shaped recessed groove 12 so that the plastic is bitten into the first plastic member 20. The plastic member 20 is fixed in the stick member 20, and when the plastic member 20 on the one side and the plastic member 21 on the other side are connected, a through hole 22 is simply bored in the plastic member 21 on the other side, The bolt 23 can be screwed into the bolt hole 13 of the embedding nut 10 by passing the bolt 23 through the recess through hole 22, and the plastic members 20 and 21 can be continuously tightened.

Since the conventional embedded screw pair of this kind can surely connect the both plastic members 20 and 21 firmly and can be disassembled without loosening the bolt 23 without damaging the both plastic members 20 and 21. However, there are still the following problems in practice.

1. In the midst of increasing awareness of environmental protection, recycling of plastic materials is emphasized, and if one of the above plastic members 20 is to be recovered, naturally the embedded nut 10 must be removed first. Since the one plastic member 20 is broken by a tool and then removed, it takes time and is easily damaged by the operator.

2. Since the embedded nut 10 is taken out by breaking the plastic member 20, a part of the plastic material scatters and scatters, so that the recovery rate is relatively low.

3. Since the embedded nut 10 is gripped and fixed in the plastic member 20 by the knurled notch 11 and the ring-shaped recessed groove 12, it is difficult to completely separate and remove it, and sometimes the crushed scraps of the nut are left behind. When the plastic member 20 is collected and reprocessed and injection-molded, not only the quality of the product is affected, but also the waste is clogged with the nozzle of the injection-molding machine and becomes a trap to increase the damage rate of the injection-molding machine. .

[0007]

[Problems to be solved by the device]

 In view of the above-mentioned problems with the conventional embedded screw connection pair, the present invention increases the recovery rate of the plastic material, reduces the damage rate of the injection molding machine, and makes it easy to separate and remove the embedded screw connection. The purpose is to provide an even number.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention embeds an embedded nut that serves as a connecting element in one plastic member, and screw a bolt that serves as a kinematic element inserted through the other plastic member to the embedded nut. By doing so, in the embedded screw contact pair that connects the both plastic members, a diameter-expanding convex edge is formed at one end of the nut body of the embedded nut, and the diameter is slightly reduced by connecting and extending to the diameter-expanding convex edge. The protrusion is provided with an appropriate length, and an insertion hole is formed substantially in the center of the end face of the protrusion, and a hand tool is inserted into the insertion hole and rotated to insert the protrusion. It is constructed so that the lock nut can be removed from the one plastic member.

It is even more preferable to provide the insertion holes in a hexagonal shape, a one-character shape or a cross-shaped shape so that a hexagonal head wrench or a one-character driver or a cross-character driver can be inserted and rotated.

According to the present invention configured as described above, when the other plastic member is connected to the one plastic member having the embedded nut embedded therein, the bolt is simply inserted into the other plastic member, Moreover, both the plastic members can be connected by screwing the bolt into the embedded nut of the one plastic member, and when the embedded nut is removed from the one plastic member, the insertion nut is removed. When a hand tool is inserted into the insertion hole and rotated counterclockwise, the embedded nut can be loosened and removed from the lower side without significantly damaging the one plastic member.

[0011]

[Embodiment of device]

 Hereinafter, the present invention will be specifically described based on an embodiment, but the present invention is not limited to this example.

FIG. 4 is a front view and a bottom view of a preferred embodiment of the present invention. As shown, the present invention inserts the embedded nut 30 into a molding die and injection-molds the plastic member at the same time. It is a thing.

The embedded nut 30 has a nut body portion 31 having a threaded portion 311 threaded on the outer peripheral surface thereof, and an enlarged diameter convex edge 32 is formed at one end of the embedded nut 30. The protrusion end portion 33 having a proper diameter and a projection is provided, and an insertion hole 35 is formed at substantially the center of the end surface of the protrusion end portion 33. It may be provided in a single-character hole, a cross-shaped hole, or the like, and in the present embodiment, the hexagonal hole will be described. However, the insertion hole 35 is rotated by inserting a hand tool (hexagonal wrench) into the insertion nut. It is for removing 30 from the plastic member.

Next, referring to FIG. 5, which is a view showing a cross section of the embedded nut 30 embedded in the plastic member 40, first, the embedded nut 30 is first placed in a molding die (not shown). When the plastic member 40 is injection-molded when placed in a place, the embedded nut 30 is easily removed by the drop of the threaded portion 311 of the nut body 31, the enlarged diameter convex edge 32, and the projection end 33. It is firmly held in the member 40.

Next, the method of use and the function and effect of this embodiment will be described as follows.

As shown in FIG. 6, when the other plastic member 50 is connected to the one plastic member 40 according to the present embodiment, the other through hole 51 is simply provided in the other plastic member 50 and By inserting the bolt 60 into the through hole 51 and screwing the bolt 60 into the screw hole 34 of the embedding nut 30 embedded in the one plastic member 40, the both plastic members 40 and 50 can be connected. .

When removing the embedding nut 30 from the one plastic member 40, the bolt 60 is first loosened and removed, and then the hand tool 70 is inserted into the insertion hole 35 as shown in FIG. Then, for example, the hexagon head wrench 70 is inserted into the hexagonal insertion hole 35 of the present embodiment, or the one-character driver is inserted into the one-character insertion hole, or the cross-shaped driver is inserted into the cross-shaped insertion hole, and the counterclockwise When it is rotated around, the embedded nut 30 can be loosened and removed from the lower side of the one plastic member 40, that is, as shown in FIG. The locking block 41 formed on the cylindrical portion corresponding to the protruding end 33 is broken, and the embedded nut 30 can be taken out from the one plastic member 40.

FIG. 8 is a view showing a cross section of another relatively preferred embodiment of the present invention fixed in a plastic member, in which the embedded nut is used to maintain the aesthetic appearance of the plastic member. 30 may be provided on the upper end side of one of the plastic members 80, and the opening of the insertion hole 35 faces upward, and the bottom of the one plastic member 80 retains a flat and aesthetically pleasing bottom surface 81. That is, when the screw hole 34 of the embedding nut 30 is provided in the blind screw hole of the opening upward and the other plastic member 90 is connected to the one plastic member 80, the other plastic member 90 is also connected. The bolt 60 can be inserted into the recess through hole 91, and the bolt 60 can be screwed into the screw hole 34 of the embedding nut 30 to firmly connect the both plastic members 80 and 90. You. Then, as shown in FIG. 9, when the embedded nut 30 is removed and collected from the one plastic member 80, a hand tool is simply inserted into the perforation hole 35 of the embedded nut 30. With proper rotation, the embedding nut 30 can be loosened and removed from the one plastic member 80, and at this time, the diameter-increasing convex edge 32 and the protrusion of the embedding nut 30 of the one plastic member 80 and the protrusion. The locking block 82 formed in the drop portion corresponding to the end portion 33 is broken, and the embedded nut 30 is separated from the one plastic member 80.

[0019]

[Effect of device]

 The present invention configured as described above has the following effects.

1. When collecting the plastic member, simply insert the hand tool into the insertion hole of the embedding nut and rotate it appropriately to remove the embedding nut from the plastic member and collect it. The removal time of the lock nut can be shortened to improve the operational safety of the operator.

2. When loosening the embedded nut, the recovery block of the plastic material is simply destroyed because the locking block formed at the drop portion corresponding to the enlarged diameter convex edge and the projection end of the embedded nut of the plastic member is broken. Is relatively high.

3. The embedded nut is firmly locked and fixed in the plastic member by the threaded portion of the nut body, the flared edge of the enlarged diameter, and the drop surface of the projection end, so when removing the embedded nut, remove the debris. When the plastic material is collected and reprocessed and injection-molded without being stuck on the plastic member, not only the quality of the product is better than the conventional technology, but also the injection port of the injection molding machine is not feared to be closed.

That is, the present invention has the effect of improving the product quality and reducing the damage rate of the injection molding machine as compared with the prior art.

[Brief description of drawings]

FIG. 1 is a view showing a side surface and an upper surface of an embedded nut in a conventional embedded screw contact pair.

FIG. 2 is a view showing a cross section in a state where an embedded nut in a conventional embedded screw contact pair is embedded in a plastic member.

FIG. 3 is a view showing a cross-section in which both plastic members are screw-connected and connected by an embedded screw-contact pair of the US.

FIG. 4 is a view showing a side surface and a lower surface of a relatively preferred embodiment of the present invention.

FIG. 5 is a view showing a cross section of the embedded nut of the above embodiment embedded in one plastic member.

FIG. 6 is a view showing a cross section in a state where both plastic members are screwed and connected according to the above embodiment.

FIG. 7 is a view showing an operation when the embedded nut of the above embodiment is loosened and removed from one plastic member.

FIG. 8 is a cross-sectional view showing a state in which both plastic members are screw-connected to each other according to another embodiment of the present invention.

FIG. 9 is a view showing an operation when the embedded nut of the another embodiment is loosened and removed from one plastic member.

[Explanation of symbols]

 30 Embedded Nut 31 Nut Body 32 Expanded Convex Edge 33 Projection End 35 Insertion Hole 40 One Plastic Member 50 The Other Plastic Member 60 Bolt

Claims (4)

[Scope of utility model registration request] 1. An embedding nut serving as a connecting element is embedded in one plastic member, and a bolt serving as a pair element inserted through the other plastic member is screwed into the embedding nut, thereby forming the two nuts. In an embedded screw contact pair for connecting a plastic member, an enlarged diameter convex edge is formed at one end of the nut body portion of the embedded nut, and a slightly reduced diameter by connecting and extending to the enlarged diameter convex edge. And the insertion hole is formed substantially at the center of the end face of the projection, and a hand tool is inserted into the insertion hole to rotate the embedded nut from the one plastic member. Embedded screw contact pair that can be removed. 2. The embedded screw contact pair according to claim 1, wherein the insertion hole is formed in a hexagonal shape so that the hexagonal head spanner can be inserted and rotated. 3. The claim 1 wherein the insertion hole is formed in a one-letter shape so that a one-letter driver can be inserted and rotated.
Embedded screw connection pair described in. 4. The cross-shaped insertion hole is provided so that a cross-shaped driver can be inserted and rotated.
Embedded screw connection pair described in.