JP2021055754A - Clip and method for manufacturing clip - Google Patents

Abstract

To provide a clip with excellent accuracy, capable of being securely adhered to a target member to enable waterproofing, and a method for manufacturing the clip.SOLUTION: A clip 10 is configured such that in a tip part 22 of a flange part 21, an edge part 24 formed by a parting line between a second mold for forming a second fitting part 17 side and a first mold for forming a first fitting part 11 side is separated from a contact surface 23 of the tip part 22 with a door inner panel toward the upper side on the second fitting part 17 side.SELECTED DRAWING: Figure 3

Description

The present invention relates to a clip for connecting two members and a method for manufacturing the clip.

Conventionally, there is a resin clip described in Patent Document 1 below as a member for attaching a door trim to a door inner panel in an automobile or the like. This resin clip has an anchor attached to the door inner panel, a connecting portion to which the door trim is attached, and a dish portion formed between the anchor and the connecting portion. The dish is circular and is pressed against the inner panel of the door to make it waterproof. Therefore, it is desirable that the sealing surface on the back surface of the dish portion, which is a portion that comes into contact with the door inner panel, is smooth so that it can be brought into close contact with the door inner panel. In resin molding, scratches and steps are likely to occur on the part in contact with the parting line of the mold as a removal mark of the mold. However, the mold of the resin clip described in Patent Document 1 is a dish in the mold. As shown in FIG. 11 in which the tip of the portion is enlarged, the parting line PL ₅ of the molds 40a and 40b is designed at the tip of the sealing surface 42 in the plate portion 41.

Japanese Unexamined Patent Publication No. 2011-27258

Conventional resin clip mold 40a, b, after all, a mold 40a to form a parting line PL _5, on the extension of b between the boundary (full press), the tip of the sealing surface 42 is communicated .. Even if it is the tip of the seal surface 42, it is still the part that is pressed against the door inner panel, so it needs to be smooth. Scratches and steps due to _{5 are likely to occur.} In the dies 40a and 40b, it is conceivable to polish the portion to be molded at the tip of the seal surface 42, but since the portion is on the extension of the push-cut, the push-cut is polished together. Ideally, the push-cuts are in perfect contact, so it is generally difficult to polish the push-cuts with an accuracy that can achieve this. Therefore, if polishing is not possible, the part is deteriorated due to wear or the like, and the accuracy of the molded product cannot be guaranteed. It requires fairly high-precision work, which is not common.

As described above, it is difficult to polish the push-cutting of the parting line. Therefore, when a part of the sealing surface is formed through the push-cutting on the parting line, the mold of the portion is deteriorated. , The accuracy of the sealing surface of the molded product is inferior, causing water leakage.

The present invention has been proposed in view of such circumstances. That is, it is an object of the present invention to provide a clip and a method for manufacturing a clip, which have excellent accuracy and can be surely adhered to a target member to be waterproof.

In order to achieve the above object, the clip according to the present invention includes a first fitting portion to which the first attachment member is attached, a second fitting portion to which the second attachment member is attached, and the first fitting portion. A first mold having a flange portion pressed against the first mounted member between the portion and the second fitting portion, and molding the first fitting portion side at the tip portion of the flange portion. The feature is that the edge portion formed by the boundary between the second fitting portion and the second mold for forming the second fitting portion side is located at a position deviated from the contact surface with the first attached member at the tip portion. To do.

The clip according to the present invention is characterized in that the edge portion is located at a position away from the contact surface toward the second fitting portion side.

The method for manufacturing a clip according to the present invention includes a first fitting portion to which the first attachment member is attached, a second fitting portion to which the second attachment member is attached, the first fitting portion and the second fitting portion. A method for manufacturing a clip having a flange portion pressed against the first attachment member between the fitting portion and the first fitting portion and the second fitting portion for forming the first fitting portion side. The feature is that the boundary with the second mold for forming the side is a position at the tip of the flange portion, which is separated from the contact surface with the first mounted member on the second fitting portion side. To do.

The method for manufacturing a clip according to the present invention is characterized in that the molded surface of the first mold for molding the contact surface is mirror-finished.

The method for producing a clip according to the present invention is characterized in that the surface roughness of the molded surface in the first mold for molding the contact surface is 0.1a.

In the method for manufacturing a clip according to the present invention, the molding surface in the first mold for molding the tip portion is depressed toward the first mold side from the boundary.
The second mold for molding the tip portion is characterized in that the molding surface is flat.

The method for manufacturing a clip according to the present invention is characterized in that the first mold is separated from the contact surface in an oblique direction.

The clip according to the present invention has a first fitting portion to which the first attachment member is attached, a second fitting portion to which the second attachment member is attached, and a first fitting portion and a second fitting portion. It has a flange portion that is pressed against the first attachment member in between, and at the tip of the flange portion, a first mold that molds the first fitting portion side and a second mold that molds the second fitting portion side. The edge portion formed by the boundary with the first portion is located at a position deviated from the contact surface with the first mounted member at the tip portion. That is, since the edge portion is not on the contact surface, the contact surface has no scratches or steps due to the boundary of the mold in the molding process. In other words, since the contact surface is not formed on the boundary, the part of the mold for forming the contact surface is not on the boundary. It is relatively easy to polish the mold if it is not a boundary. That is, since the contact surface is formed at a portion of the mold that is relatively easy to polish, the contact surface is formed at a portion where the surface roughness is appropriately adjusted. Therefore, the clip has excellent accuracy and can be reliably adhered to the first mounted member to be waterproof.

In the clip according to the present invention, the edge portion is located at a position separated from the contact surface toward the second fitting portion side. With this configuration, the contact surface is free from scratches and steps due to mold boundaries during the molding process. In addition, it has a contact surface formed by a mold having an appropriately adjusted surface roughness. Therefore, the clip has excellent accuracy and can be reliably adhered to the first mounted member to be waterproof.

The method for manufacturing a clip according to the present invention includes a first fitting portion to which the first attachment member is attached, a second fitting portion to which the second attachment member is attached, and a first fitting portion and a second fitting. A method for manufacturing a clip having a flange portion pressed against the first attachment member between the portions, wherein the first mold for forming the first fitting portion side and the second fitting portion side are formed. The boundary with the second mold is a position at the tip of the flange portion, which is separated from the contact surface with the first mounted member on the second fitting portion side. That is, since the contact surface is formed so as to deviate from the boundary of the mold, a contact surface having no scratches or steps due to the boundary in the molding process is formed. Also, the contact surface is formed in a mold that is relatively easy to polish, not on the boundary, and has an appropriately adjusted surface roughness. Therefore, according to the present invention, it is possible to manufacture a clip having excellent accuracy and which can be reliably adhered to and waterproofed to the first mounted member.

In the method for manufacturing a clip according to the present invention, the molding surface of the first mold for molding the contact surface is mirror-finished. Therefore, depending on the state of the molded surface, the molded contact surface also becomes dense and smooth, and according to the present invention, a clip having excellent accuracy and capable of being reliably adhered to the first mounted member and waterproofed is manufactured. be able to.

In the method for manufacturing a clip according to the present invention, the surface roughness of the molded surface in the first mold for molding the contact surface is 0.1a. Therefore, with the state of the molded surface, the state of the molded contact surface becomes dense and smooth, and the clip can be reliably adhered to the first mounted member to be waterproof.

In the method for manufacturing a clip according to the present invention, the molding surface in the first mold for molding the tip portion is depressed toward the first mold side from the boundary, and the molding surface in the second mold for molding the tip portion is formed. It is flat. That is, since the molding surface for forming the contact surface is deviated from the boundary of the mold, the contact surface is deviated from the boundary of the mold and the contact surface is formed without any scratches or steps due to the boundary in the molding process. .. Also, the contact surface is molded on a molded surface that is relatively easy to polish and has an appropriately adjusted surface roughness, not on the boundary. Therefore, according to the present invention, it is possible to manufacture a clip having excellent accuracy and which can be reliably adhered to and waterproofed to the first mounted member.

In the method for manufacturing a clip according to the present invention, the first mold is separated from the contact surface in an oblique direction. With this configuration, friction between the contact surface and the first mold is suppressed, and so-called "galling" is suppressed. Therefore, according to the present invention, it is possible to manufacture a clip having excellent accuracy and which can be reliably adhered to and waterproofed to the first mounted member.

FIG. 1 is a schematic view of a state in which the clip according to the embodiment of the present invention is attached to the first attached member and the second attached member. FIG. 2 is an external perspective view of the clip according to the embodiment of the present invention. FIG. 3 is a side view of the clip according to the embodiment of the present invention. FIG. 4 is a front view of the clip according to the embodiment of the present invention. FIG. 5 is a bottom view of the clip according to the embodiment of the present invention. FIG. 6 is a front cross section of the clip according to the embodiment of the present invention, and is a VI-VI cross section of FIG. FIG. 7 is a side sectional view of the clip according to the embodiment of the present invention, and is a sectional view taken along line VII-VII of FIG. FIG. 8 is a front cross section of a clip according to an embodiment of the present invention, and is a schematic explanatory view for explaining a method of manufacturing a clip formed by a mold. FIG. 9 is an enlarged cross section of a flange portion of the clip according to the embodiment of the present invention, and is an enlarged view of IX of FIG. FIG. 10 is a boundary explanatory view showing a boundary between molds on the lower surface of the clip according to the embodiment of the present invention. FIG. 11 is a schematic explanatory view of the prior art.

Hereinafter, clips according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an outline of a usage state of the clip 10 according to the present embodiment, and FIGS. 2 to 7 show the appearance of the clip 10. In the following description, the height direction of the clip 10 is up and down (Up, Down), and the width direction is front and back (Front, Back) and left and right side (Left, Right) (see FIG. 2).

As shown in FIG. 1, the clip 10 connects the door inner panel 1 as the first attached member and the door trim 3 as the second attached member arranged so as to face each other. The door inner panel 1 is formed with a hole 2, while the door trim 3 has an attached portion 4, and a groove 5 is formed in the attached portion 4. The lower side of the clip 10 is the first fitting portion 11 that fits into the hole 2 of the door inner panel 1, and the upper side of the clip 10 is the second fitting portion 17 that fits into the groove 5 of the door trim 3. .. The clip 10 has a flange portion 21 between the fitting portions 11 and 17. The clip 10 is made of, for example, a synthetic resin, and when the first fitting portion 11 is attached to the hole 2 of the door inner panel 1, the flange portion 21 is pressed against the door inner panel 1. The flange portion 21 is elastically deformed and comes into close contact with the door inner panel 1. The second fitting portion 17 is passed through the groove 5 of the door trim 3 and attached to the attached portion 4.

As shown in FIGS. 2 to 7, the second fitting portion 17 of the clip 10 has two sandwiching portions 18 and 19 that sandwich the mounted portion 4 of the door trim 3 from both sides, and a groove 5 of the mounted portion 4. It has a shaft core portion 20 arranged in. That is, the second fitting portion 17 is connected to the disc-shaped end holding portion 18 and the annular middle holding portion 19 facing each other at the center on the lower surface of the end holding portion 18, and the middle holding portion. It is composed of a columnar shaft core portion 20 connected to the center on the upper surface of 19.

The flange portion 21 projects downward and laterally in an annular shape on the lower surface of the central sandwiching portion 19. The tip portion 22 which is the peripheral edge of the flange portion 21 has a contact surface 23 on the lower surface side and an edge portion 24 on the upper surface side. The contact surface 23 is a portion pressed against the door inner panel 1 and is smoothly formed. The edge portion 24 is separated from the contact surface 23 toward the upper side on the second fitting portion 17 side. The edge portion 24 is inevitably formed on the parting line PL (see FIG. 8), which is the boundary of the mold maker, at the time of molding.

The first fitting portion 11 of the clip 10 is composed of a plurality of leg portions and is narrowed downward. That is, the first fitting portion 11 has a shaft leg portion 12 connected to the center on the lower surface of the flange portion 21 and a position around the shaft leg portion 12 and away from the shaft leg portion 12. It is composed of a plurality of locking legs 13a, b, c, d connected to the lower surface of the flange portion 21. The shaft leg portion 12 is substantially columnar and has ribs 14a, b, 15a, and b protruding from the center toward the front-rear and left-right sides. The ribs 14a, b, 15a, and b are arranged at substantially equal intervals in the circumferential direction centered on the shaft leg portion 12. The pair of long ribs 14a and b arranged on the left and right sides, which are two directions opposite to the shaft leg portion 12, are downward along the longitudinal direction of the shaft leg portion 12 from the connecting portion with the flange portion 21. It extends and reaches the vicinity of the shaft tip portion of the shaft leg portion 12. On the other hand, the short ribs 15a and b arranged in the front and rear in two directions opposite to each other with respect to the shaft leg portion 12 are formed at the connecting portion with the flange portion 21 and are formed shorter than the long ribs 14a and b. ing.

The locking legs 13a, b, c, and d are arranged between the long and short ribs 14a, b, 15a, and b. The locking leg portions 13a, b, c, and d extend downward along the longitudinal direction of the shaft leg portion 12 from the connecting portion with the flange portion 21, and are connected to the vicinity of the shaft tip portion of the shaft leg portion 12. .. Therefore, a gap is formed between the shaft leg portion 12 and the locking leg portions 13a, b, c, and d except for the connecting portion with the flange portion 21 and the connecting portion with the shaft tip portion, and an external force acts on the shaft leg portion 12. Then, the locking legs 13a, b, c, and d are elastically deformed toward the shaft leg 12. The side surfaces of the locking leg portions 13a, b, c, d that are connected to the flange portion 21 are formed with recessed portions 16a, b, c, d that are recessed toward the center.

As described above, the clip 10 is configured.

Next, a method of manufacturing the clip 10 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 8 shows a cross section of the clip 10 before it is removed from the mold, FIG. 9 shows the enlarged tip 22 of the flange portion 21, and FIG. 10 shows the gold on the lower surface of the clip 10. The parting line PL of the mold is shown.

The clip 10 is molded by, for example, injection molding. As shown in FIG. 8, the mold includes a fixed side mold 30, a pair of movable side molds 31a and b, a pair of second molds 33a and b, and a single third mold 35. It has and forms a molding space inside in a molded state. A nozzle of an injection molding machine is attached to the fixed side mold 30 to form a spool (not shown). A material such as a molten synthetic resin is ejected from a nozzle in a state of being molded by the molds 30, 31a, b, 33a, b, and 35, and is filled in the molding space via a spool.

The second molds 33a and 33 form the second fitting portion 17 side of the clip 10 with the tip portion 22 of the flange portion 21 as a boundary. The first molds 31a and b and the third mold 35 form the first fitting portion 11 side of the clip 10 with the tip portion 22 of the flange portion 21 as a boundary. The first molds 31a and b are left and right lateral portions of the first fitting portion 11, and the long ribs 14a and b and the locking leg portions 13a, b, c and d are formed to form the third mold. Reference numeral 35 denotes front and rear portions of the first fitting portion 11, which form the short ribs 15a and b and the locking leg portions 13a, b, c and d.

_{The parting line PL 2} , which is the boundary between the fixed side mold 35 and the second mold 33a, b, is on the peripheral edge of the end holding portion 18 of the second fitting portion 17. _{The parting line PL 2} , which is the boundary between the second mold 33a and b and the first mold 31a and b, is the tip portion 22 of the flange portion 21 and is closer to the second fitting portion 17. More specifically, as shown in FIG. 9, in the second mold 33a (or 33b), the second mold molding surface 34 forming the molding space of the tip portion 22 is flat, while the first mold in 31a (or 31b), the first mold forming surface 32 to form the molding space of the tip portion 22 is recessed toward the first die 31a (or 31b) side of the parting line PL _2. In other words, the parting line PL ₂ is arranged apart from the contact surface 23 of the tip portion 22 toward the upper side, which is the second mold 33a (or 33b) side (second fitting portion 17 side). There is. The first mold molding surface 32 is mirror-finished in advance by electric discharge machining or the like, and the surface roughness of the first mold molding surface 32 is Ra = 0.1a.

When the leading end portion 22 is molded in each molding surface 32, on the parting line PL ₂ is at the edge portion 24 is formed at the tip portion 22, the parting line PL _2, the contact surface of the tip portion 22 Since it is deviated from 23, the edge portion 24 is not formed on the contact surface 23. Further, since the state of the first mold molding surface 32 is appropriately adjusted by polishing, the state of the contact surface 23 is also appropriate.

_{As shown in FIG. 10, the parting line PL 3} , which is the boundary between the first type 31a, b and the third type 35, is the locking leg portion 13a, b, c, d of the first fitting portion 11. It is between the shaft leg portion 12 and the shaft leg portion 12. _{Further, the parting line PL 4} , which is the boundary between the pair of first molds 31a and b, is on a straight line that divides the first fitting portion 11 into left and right, and the short ribs 15a and b of the first fitting portion 11 are formed. It is on the extension from to the front and back. That is, the parting line PL ₄ is composed of two parts, one directed forward from the shaft leg portion 12 of the first fitting portion 11 and one directed rearward. In other words, the parting lines PL ₄ are arranged at two positions on the first mold forming surface 32 of the first molds 31a and b.

In this manufacturing method, the mold is opened through a pressure holding step, a cooling step, and the like as appropriate. In FIG. 8, the movable side mold is separated downward from the fixed side mold 30. Second type 33a, b are open at is away in the direction of arrow _D 1, _{D 2} towards the left and right side. The first type 31a and b open in the directions of _{arrows D 3} and D ₄ which are lateral and downward on the left and right sides. More specifically, the first molds 31a and 31b open obliquely away from the contact surface 23 of the clip 10. That is, the direction away from the contact surface 23 is such that no frictional force is generated between the contact surface 23 and the contact surface 23, or the frictional force is reduced as much as possible. Finally, an extrusion pin (not shown) protrudes from the third mold 35, and the clip 10 is pushed out from the third mold 35 and comes off.

As described above, the clip 10 is formed through the present manufacturing method.

Next, the effect of this embodiment will be described.

In the present embodiment, at the tip portion 22 of the flange portion 21, _{the edge portion 24 formed by the parting line PL 2 of} the first mold 31a, b and the second mold 33a, b is formed on the door inner panel at the tip portion 22. It is separated from the contact surface 23 with 1 toward the upper side on the second fitting portion 17 side (see FIG. 9). That is, since the edge portion 24 is not formed on the contact surface 23, the contact surface 23 is not scratched or stepped by the _{parting line PL 2.} In other words, in the first molds 31a and b, the first mold molding surface 32 for molding the contact surface 23 _{is not 2} on the parting line PL, so that the first mold molding surface 32 is polished. Is relatively easy. That is, since the contact surface 23 is formed at a portion that is relatively easy to polish, the contact surface 23 is formed on the first mold molding surface 32 in which the surface roughness is appropriately adjusted. Therefore, the clip 10 has excellent accuracy and can be reliably adhered to the door inner panel 1 to be waterproof.

In the present embodiment, the first mold molding surface 32 is mirror-finished in advance by electric discharge machining or the like, and the surface roughness of the first mold molding surface 32 is Ra = 0.1a. Therefore, with the state of the first mold molding surface 32, the contact surface 23 of the molded clip 10 also becomes dense and smooth.

In the present embodiment, in the second molds 33a and b, the second mold molding surface 34 forming the molding space of the tip portion 22 is flat, while in the first molds 31a and b, the tip portion 22 is molded. first mold forming surface 32 to form a space, the first type 31a than the parting line PL _2, are recessed toward the b side (see FIG. 9.). That is, the parting line PL ₂ is arranged away from the contact surface 23 of the tip portion 22 toward the upper side, which is the second mold 33a, b side (second fitting portion 17 side). Therefore, the edge portion 24 formed by the parting line PL ₂ can form the clip 10 which is separated upward from the contact surface 23 with the door inner panel 1 on the side of the second fitting portion 17. it can.

In the present embodiment, the first molds 31a and 31b open apart from the contact surface 23 of the clip 10 toward the arrows D ₃ and D ₄ in the oblique direction (see FIG. 8). That is, the first molds 31a and 31b are separated from each other in a direction in which they do not rub against the contact surface 23 and in a direction in which no frictional force is generated between the contact surface 23 or in a direction in which the frictional force is reduced as much as possible. With this configuration, friction between the contact surface 23 and the first molds 31a and b is suppressed, and "galling" is suppressed.

_{In the present embodiment, the parting lines PL 4} , which are the boundaries between the pair of first molds 31a and b, are arranged at two locations on the first mold molding surface 32 of the first molds 31a and b. If there are two parting lines PL ₄ , the first mold molding surface 32 can be easily and uniformly polished.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments. The present invention can be modified in various ways as long as it does not deviate from the matters described in the claims. Since the present invention connects two members with waterproofing, the target member is arbitrary. The present invention is also used, for example, for panels of ships, railways, aircraft, etc., and walls of buildings, etc.

1 Door inner panel (first member to be attached)
2 holes 3 door trim (second mounting member)
4 Attached part 5 Groove 10 Clip 11 First fitting part 12 Shaft leg part 13a to d Locking leg part 14a, b Long rib 15a, b Short rib 16a to d Recessed part 17 Second fitting part 18 End part pinching Part 19 Middle part Holding part 20 Shaft core part 21 Flange part 22 Tip part 23 Contact surface 24 Edge part 30 Fixed side mold 31a, b First mold 32 First mold molding surface 33a, b Second mold 34 Second mold molding surface 35 Third mold D _{1 to 4} Arrow PL _{1 to 4} Parting line 40a, b Mold 41 Plate part 42 Sealing surface PL ₅ Parting line

Claims (7)

The first fitting part to which the first member to be attached is attached,
The second fitting part to which the second member to be attached is attached, and
It has a flange portion that is pressed against the first mounted member between the first fitting portion and the second fitting portion.
At the tip of the flange, the edge formed by the boundary between the first mold that molds the first fitting portion side and the second mold that molds the second fitting portion side is the tip portion. It is located at a position deviated from the contact surface with the first mounted member.
A clip that features that. The edge portion is located at a position away from the contact surface toward the second fitting portion side.
The clip according to claim 2. The first fitting portion to which the first mounting member is mounted, the second fitting portion to which the second mounting member is mounted, and the first fitting portion between the first fitting portion and the second fitting portion. A method for manufacturing a clip having a flange portion pressed against a member to be attached.
The boundary between the first mold that molds the first fitting portion side and the second mold that molds the second fitting portion side is the contact surface with the first mounted member at the tip of the flange portion. The position is set closer to the second fitting portion side than the above.
A method of manufacturing a clip, which is characterized in that. The molding surface of the first mold for molding the contact surface is mirror-finished.
The method for manufacturing a clip according to claim 3, wherein the clip is manufactured. The surface roughness of the molded surface in the first mold for molding the contact surface is 0.1a.
The method for manufacturing a clip according to claim 3 or 4, wherein the clip is manufactured. The molding surface in the first mold for molding the tip portion is depressed toward the first mold side from the boundary.
The molding surface in the second mold for molding the tip portion is flat.
The method for manufacturing a clip according to any one of claims 3 to 5, wherein the clip is manufactured. The first mold is separated from the contact surface in an oblique direction.
The method for manufacturing a clip according to any one of claims 3 to 6, wherein the clip is manufactured.

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