JP2013130233A - Clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp to which a seal member (packing) having a sufficient size can be attached, suitably suppressing falling of the seal member with a simple structure.SOLUTION: The clamp 1 has such a structure that a dish part 21 is formed on the surface of a base part 20 holding a wire harness and the like, for example and a columnar part 22 projects therefrom. The packing 3 is attached to the columnar part 22. A ring member 4 is disposed frontward of the packing and locked by a lock part 23. Falling of the packing 3 is suppressed by the ring member 4. Thereby, the packing 3 can be made larger than the outer shape of the dish part 21, whereby a high sealing function can be achieved.

Description

  The present invention relates to a clamp.

  As is well known, for example, a clamp for wiring has a basic structure including a portion for holding an electric wire such as a wire harness and a portion for attaching to a mounting hole provided in a wiring portion. Furthermore, when a waterproof performance is required as in the case where the mounting location is a panel in the vehicle, an appropriate sealing function (sealing function) is added. For example, Patent Document 1 below discloses a clamp that achieves waterproof performance when attached to a panel hole.

JP 2000-249120 A

  In the clamp of Patent Document 1, when a packing (seal member) is attached to the clamp, the sealing function is realized by a gel substance, paying attention to the possibility of the packing being dropped. However, since a seal structure using packing or the like is widely used, it is important to develop a clamp in which the dropping of packing or the like is suppressed.

  Also, in conventional clamps with packings, an adhesive (adhesive) was sometimes used to prevent the packing from falling off. In this case, avoid sticking out of the adhesive (adhesive). As a result, the packing could not have a sufficient size. In the development of a structure that suppresses the dropping of the packing (seal member), it is necessary to allow the packing (seal member) to have a sufficient size. Furthermore, it is naturally desirable that the structure for preventing the packing (seal member) from dropping off is not an excessively complicated structure.

  Therefore, the problem to be solved by the present invention is to provide a clamp in which a seal member (for example, a packing) having a sufficient size can be mounted and the dropout of the seal member is appropriately suppressed by a simple structure. is there.

  In order to solve the above-described problems, a clamp according to the present invention has a dish-like portion formed in a dish-like shape opened outward on the surface of a base for holding an object to be held, and the dish-like portion. It is formed in a column shape that protrudes from the inner surface and has a locking portion on the side, and is provided with a columnar portion that is inserted into a mounting hole formed on the mounting target, and a through hole, and is inserted into the through hole. In a state where the columnar part is inserted into the hole to be attached, the sealing part has a sealing function between the columnar part and the hole, and has elasticity, and the columnar part and the seal part Is a separate body and is sandwiched between the locking portion of the columnar portion and the seal portion into which the columnar portion is inserted, and in the sandwiched state, is radially outside the columnar portion with respect to the locking portion. The seal portion has a shape having a portion extending in the direction, and the extended portion Characterized in that and a suppressor for suppressing portion from falling off from the columnar portion.

  Accordingly, the clamp according to the present invention includes a suppression part that suppresses the dropout of the seal part separately from the columnar part and the seal part, and the suppression part is a seal in which the locking part of the columnar part and the columnar part are inserted. And a shape having a portion extending radially outward with respect to the columnar portion rather than the locking portion in the sandwiched state. And the drop-off | omission from the columnar part of a seal part is suppressed by the extended part. Thereby, since the suppression part protrudes in a radial direction rather than the locking part, the direction where there is no suppression part is less likely to remove the through hole of the seal part. Accordingly, a clamp that effectively holds the seal portion between the locking portion and the seal portion and effectively suppresses the dropout of the seal portion by providing a separate member that protrudes in the radial direction from the locking portion at that time. realizable.

  Further, the restraining portion has an annular shape, and the columnar portion is inserted such that the annular hole portion is on a tip side and the through hole of the seal portion is on a root side, and at least a part of the annular shape is provided. The ring shape has a portion extending radially outward from the locking portion in a state where the locking portion is locked by the locking portion, and the extended portion extends from the columnar portion of the seal portion. It is good also as an annular part which suppresses omission.

  According to the present invention, the restraining portion is ring-shaped and is formed so that at least a part protrudes in the radial direction from the locking portion when mounted on the columnar portion so as to be sandwiched between the locking portion and the seal portion. To do. Thereby, the part which protruded in the radial direction rather than the locking part in the ring shape effectively suppresses the through hole of the seal part from being detached from the columnar part. Therefore, a clamp that effectively suppresses the dropout of the seal portion can be realized by a simple ring-shaped member.

  In the state where the columnar part is inserted into the through hole of the seal part, the radial outer edge shape of the seal part may be larger than the radial outer edge shape of the dish-like part.

  According to this invention, the radial outer edge shape of the seal portion is made larger than the radial outer edge shape of the dish-shaped portion. That is, the radial outer edge shape of the seal portion is not made smaller than the radial outer edge shape of the dish-like portion like a clamp that adheres (adheres) the seal portion to the dish-like portion in the prior art. Therefore, the clamp of this invention can implement | achieve the sealing function with a high seal part in the state attached to the attachment object.

  Also, the locking portion is inserted into the through hole of the seal portion, and the columnar portion is formed on the mounting target in a state where the suppression portion is sandwiched between the locking portion and the seal portion. When inserted into the hole, the locking portion may be locked to the mounting hole, and the clamp may be attached to the mounting target.

  According to this invention, the suppression part which suppresses drop-off | omission of a seal | sticker part in the state before attachment is latched using the latching | locking part for latching the attachment hole of attachment object. In other words, the locking portion has two functions: a function of locking the mounting hole to be mounted and a function of locking the suppressing portion that suppresses the dropout of the seal portion in a state before mounting to the mounting target. Realize. Therefore, the structure for suppressing the dropout of the seal portion is simplified by effectively using the locking portion for the two locking.

  Further, in the state where the columnar portion is inserted into the through hole of the seal portion and the suppression portion is sandwiched between the locking portion and the seal portion, the radially outer edge shape of the suppression portion is the shape of the seal portion. It may be smaller than both the radial outer edge shape and the radial outer edge shape of the dish-shaped portion.

  According to this invention, the radial outer edge shape of the suppressing portion is formed smaller than both the radial outer edge shape of the seal portion and the radial outer edge shape of the dish-shaped portion. Therefore, in the present invention, the dropout of the seal portion can be effectively suppressed by a relatively small member.

The disassembled perspective view in one Example of the clamp of this invention. The figure which shows the example of the clamp before mounting | wearing with a packing and a ring member. The figure which shows the example of the clamp of the state which mounted | wore the packing and the ring member. The figure which shows the example of the clamp attached to the panel. The figure which shows the example of the clamp of the state which attached the packing in a prior art. The figure which shows another example of the clamp of the state which attached the packing in a prior art. The figure which shows the example of the clamp attached to the panel in a prior art. The figure which shows the example of another form of a ring member.

  Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 is an exploded perspective view of a clamp 1 in one embodiment of the present invention. As shown in FIG. 1, the clamp 1 includes a main body 2, a packing 3, and a ring member 4. The main body 2 includes a base 20, a dish-shaped portion 21, a columnar portion 22, and an arm-shaped portion 23.

  The base 20 is a part for holding something to be held (an object to be held). Examples of the object to be held include a wire harness and the like. In the case of FIG. 1, the base 20 is formed in a thin plate shape extending in one direction. In the case of this shape, for example, a wire harness (electric wire) is placed in the length direction on a rectangular surface (on the surface opposite to the side on which the dish-like portion 21 is formed), and some holding member (tape Etc.). In the present invention, the shape of the base 20 is not limited to the shape shown in FIG.

  The dish-shaped portion 21 is formed in a dish shape that is opened outward from the surface opposite to the surface that holds the object to be held in the base portion 20. As will be described later, the packing 3 is disposed in a positional relationship in contact with the dish-shaped inner surface side. In the example of FIG. 1, the outer shape of the dish-like portion 21 in plan view is an elliptical shape extending in the length direction of the base portion 20.

  The columnar portion 22 is formed in a column shape protruding from the bottom portion on the inner surface side of the dish-shaped portion 21. In the example of FIG. 1, the columnar portion 22 has a substantially quadrangular prism shape, and the cross-sectional shape of the columnar portion 22 is a substantially square shape that is long in the length direction of the base portion 20, but is not limited to this shape in the present invention. The cross section of the columnar portion 22 may have an arbitrary shape.

  The arm-shaped part 23 is formed in a shape that protrudes laterally from the side surface of the columnar part 22. In the example of FIG. 1, the columnar portion 22 is formed so as to extend from the side edge portion at the tip, and the tip is directed toward the dish-shaped portion 21 of the columnar portion 22. In the case of FIG. 1, a pair of arm portions 23 are formed from two positions at the tip of the columnar portion 22. The direction in which the arm-like portion 23 is formed may be a direction parallel to the length direction of the base portion 20, a direction perpendicular thereto, or another direction. In the present invention, the number of arm portions 23 is not limited to two (one pair).

  The joint portion between the arm portion 23 and the columnar portion 22 has elasticity. Thereby, for example, when the tip of the arm-like part 23 is pressed, the angle of the base part of the arm-like part 23 changes, and the tip of the arm-like part 23 can be brought close to the columnar part 22 or away from the columnar part 22. is there.

  As shown in FIG. 2, the tip of the arm portion 23 is formed in a step shape, and each step in the step shape is a locking claw portion 23 a, 23 b, 23 c. As will be described later, according to the thickness of the mounting hole in the mounting target, the mounting target may be mounted using any one of the claw portions 23a, 23b, and 23c. That is, a plurality of locking portions having different distances from the columnar portion are formed on the side of the columnar portion 22, and one of the plurality of locking portions is selected according to the thickness of the mounting hole in the mounting target. With such a configuration, the clamp 1 can change the size of the packing 3 and the ring member 4 in accordance with the thickness of the mounting hole to be mounted without changing the body 2 even if the mounting target is changed. Can have performance.

  The main body 2 may be integrally formed with a resin material (polypropylene or the like), for example. At that time, the elasticity of the joint portion between the arm-like portion 23 and the columnar portion 22 may be the elasticity due to the naturally allowed bending due to the shape of the joint portion being narrowed.

  The packing 3 (seal part) is disposed for a sealing function (sealing function) for the purpose of waterproofing when the clamp 1 is attached to an attachment target. In the example of FIG. 1, the packing 3 has a ring shape having a through hole 30. The outer shape of the packing 3 in plan view may be similar to the outer shape of the dish-shaped portion 21 and may be slightly larger than the planar shape of the dish-shaped portion 21.

  The packing 3 is disposed so that the columnar portion 22 is inserted into the through-hole 30 and abuts against the inner surface side of the dish-shaped portion 21. Therefore, in the arrangement state, the outer edge of the packing 3 protrudes to the outside of the dish-like portion 21 over the entire circumference. The material of the packing 3 is formed of a material having elasticity (flexibility), for example, urethane.

  The ring member 4 (suppressing part) is a main part of the present invention, and is arranged mainly for the purpose of suppressing (preventing) the packing 3 from dropping off. In the example of FIG. 1, the shape of the ring member 4 is an O-ring shape (annular shape) with a through-hole 40, and the outer edge shape is similar to the packing 3 and the dish-shaped portion 21, and the packing 3 and the dish The oval shape is smaller than the shape portion 21. The material of the ring member 4 may be, for example, the same resin material as that of the main body 2, polypropylene, or the like.

  FIG. 2 shows a state where the packing 3 and the ring member 4 are not attached to the main body 2 of the clamp 1. In this state, the pair of arm portions 23 spreads in the horizontal direction in the figure.

  FIG. 3 shows a state in which the packing 3 and the ring member 4 are attached to the main body 2 of the clamp 1. FIG. 3 (and FIG. 4 described later) is a cross-sectional view of a cross section parallel to the length direction of the base 2. As illustrated, the packing 3 and the ring member 4 are inserted from the front end side of the columnar portion 22. By being pressed by the through hole 40 of the ring member 4 and the through hole 30 of the packing 3, the arm portion 23 is pressed from both the left and right sides in the drawing, and is closed inward as compared with the state of FIG. 2. .

  The diameters of the through hole 40 of the ring member 4 and the through hole 30 of the packing 3 may be the same as the diameter of the attachment hole 11 of the panel 10 to be attached. In the example of FIG. 3, the ring member 4 and the packing 3 are locked by the claw portion 23a. Due to the elastic restoring force of the base portion of the arm-shaped portion 23, the outer peripheral surface of the arm-shaped portion 23 and the inner peripheral surface of the through-hole 40 of the ring member 4 and the through-hole 30 of the packing 3 are pressed against each other and are in a stable state. It becomes. In this pressing, the presence of the ring member having higher strength than the packing contributes to stability.

  The state shown in FIG. 3 may be the state when the clamp 1 is shipped. In the clamp 1 shipped in this state, the columnar portion 22 is attached to the attachment target in a state in which the holding object is held on the base portion 20. As above-mentioned, there exists a wire harness as an example of a holding | maintenance object, and there exists a panel inside the door of a motor vehicle as an example of attachment object. In this example, waterproofing by the packing 3 is required. Hereinafter, this example will be described. For example, the panel 10 shown in FIG. 4 is a panel for attaching a wire harness disposed inside the vehicle door. For example, the upper side in FIG. . In addition, this invention is not limited to holding | maintenance of a wire harness and attachment to a vehicle panel.

  FIG. 4 shows the clamp 1 attached to the panel 10. The mounting hole 11 of the panel 10 is inserted to the position of the claw portion 23a and is locked by the claw portion 23a. The ring member 4 and the packing 3 are pressed by the panel 10 in the root direction of the columnar portion 22 (in the direction of the dish-shaped portion 21, upward in the drawing).

  Due to the elastic restoring force of the base portion of the arm-shaped portion 23, the outer peripheral surface of the arm-shaped portion 23 and the inner peripheral surface of the mounting hole 11 of the panel 10 are pressed against each other to be in a stable state. Since the packing 3 is formed of a material having high flexibility such as urethane as described above, the packing 3 is deformed by this pressing and realizes a sealing function in this state.

  5 to 7 show examples of clamps in the prior art for comparison with the present invention. 5 and 6 are before attachment to the panel 10, and FIG. 7 is after attachment to the panel 10.

  The prior art clamps 1 ′, 1 ″ shown in FIGS. 5 to 7 are not provided with the ring member 4 of the present invention. Therefore, in the clamp 1 ′ of FIG. 5, the shape of the through hole of the packing 3 ′ is not provided. However, as long as it becomes larger than the outermost edge of the arm-shaped portion 23, the packing 3 'has been turned up and dropped off, so if for some reason the shape of the packing 3' is distorted, as shown by the broken line in FIG. The packing 3 'falls off relatively easily.

  6 and 7, in order to cope with this problem, the packing 3 ′ is attached to the clamp 1 ′ by attaching the packing 3 ′ to the dish-like portion 21. , Application of the adhesive (adhesive) to the packing '(or the dish-like portion 21) is used.In that case, since it is desired to avoid the sticking out of the adhesive (adhesive), as shown in FIG. The outer shape of this was inevitably smaller than the outer shape of the dish-like portion 21.

  When the clamp 1 'is attached to the panel, the state shown in FIG. 7 is obtained. As shown in the figure, the mounting hole 11 of the panel 10 is locked to the claw portion 23a, and the panel 10 presses the packing 3 'to deform the packing. Even in this state, the packing is made up to a portion near the outer edge of the dish-shaped portion 21. The outer edge of 3 ′ does not reach, and so-called dish floating occurs.

  In the following, the effects of the present invention will be described by comparing FIGS. 3 and 4 of the present invention with FIGS. 5 to 7 of the prior art.

  In the prior art shown in FIG. 5, if the shape of the through hole 30 of the packing 3 ′ is distorted for some reason, the packing 3 turns up and falls off as long as it becomes larger than the outermost edge of the arm 23. It was. On the other hand, in the present invention shown in FIG. 3, the ring member 4 is disposed closer to the distal end side of the columnar portion 22 than the packing 3. Thereby, unless the shape of the through-hole of the packing 3 becomes larger than the outer shape of the ring member 4, the packing 3 does not fall off.

  As shown in FIG. 3, the outer shape of the ring member 4 is designed to be larger than the outermost edge of the arm-like portion 23. Therefore, in the clamp 1 of the present invention, the dropping of the packing 3 is suppressed as compared with the prior art. In addition, since the ring member 4 itself is formed of a material that is not easily deformed, such as polypropylene, the possibility of the ring member 4 being dropped is low. Therefore, in the present invention, the ring member 4 effectively suppresses the dropping of the packing 3 from the time of shipment of the clamp to the stage before the mounting.

  Next, in the prior art shown in FIG. 6 and FIG. 7, as described above, the packing 3 ′ is adhered (adhered) to the dish-like portion 21, and therefore the packing 3 ′ is pressed even when pressed by the panel 10. Is smaller than the outer shape of the dish-like portion 21, and the dish is lifted.

  On the other hand, in the present invention shown in FIG. 4, since the packing 3 is mounted using the ring member 4, the outer shape of the packing 3 can be made larger than the outer shape of the dish-shaped portion 21. As a result, the dish is not lifted, and a portion where the packing 3 is particularly strongly compressed is formed at the outer edge portion of the dish-shaped portion 21. This compressed portion is formed in a line shape along the entire circumference of the outer edge of the dish-like portion 21, and becomes a line seal structure having high sealing performance. As described above, the packing 3 may be formed of a water-absorbing material such as urethane. Even in this case, the compressed portion has a high function of suppressing the passage of moisture to the inside.

  Therefore, in the case of FIG. 4, a seal structure in which the above-described line seal structure is added to the surface seal structure between the surface of the packing 3 and the surface of the panel 10 and the dish-shaped portion 21 is realized. On the other hand, in the prior art of FIG. Therefore, the clamp 1 of the present invention achieves higher sealing performance than the prior art.

  The above embodiment can be appropriately changed within the scope of the spirit described in the claims. For example, in the present invention, the shape of the ring member 4 is not limited to the shape shown in FIG. FIG. 8 shows another form of the ring member. The ring member 4 ′ shown in FIG. 8 is a case where a part of the ring shape is omitted (C ring shape). That is, in the present invention, the suppressing portion can be an O-ring shape or a C-ring shape ring shape.

  Even with the shape as shown in FIG. 8, if the clamp 1 is attached, the effect of suppressing the dropping of the packing 3 can be realized. That is, in the example of the structure of FIG. 3, the ring member 4 has a structure (shape) that is locked to the claw portions 23 a, 23 b, and 23 c, and the deformation of the through hole 30 of the packing 3 in the locked state. What is necessary is just to provide the structure (shape) which has the part extended to radial direction exceeding the possible range.

  More generally, the restraining portion is sandwiched between the locking portion of the columnar portion and the seal portion (packing) into which the columnar portion is inserted, and in the sandwiched state, the restraining portion is radially outside the locking portion. Any shape may be used as long as it has a shape having a portion extending in the direction, and the extended portion suppresses dropping of the seal portion from the columnar portion.

1 Clamp 2 Body 3 Packing (seal part)
4 Ring members (restraining part, annular part)
10 Panel (Mounting target)
23 Arm-shaped part (locking part)
23a, 23b, 23c Claw part (locking part)

Claims (5)

On the surface of the base for holding the object to be held, a dish-shaped part formed in a dish shape opened outward,
A columnar portion that is formed from a columnar shape that protrudes from the inner surface of the dish-shaped portion and has a locking portion on the side, and is inserted into a mounting hole portion that is formed on the mounting target;
A through hole is provided, and the columnar portion inserted into the through hole is inserted into the hole to be attached, and has a sealing function between the columnar portion and the hole portion, and is elastic. Having a seal part;
The columnar part and the seal part are separate from each other, and are sandwiched between the locking part of the columnar part and the seal part into which the columnar part is inserted. Also having a shape having a portion extending radially outward with respect to the columnar portion, and a suppressing portion that suppresses dropping of the seal portion from the columnar portion by the extended portion;
A clamp characterized by comprising:   The suppressing portion has an annular shape, and the columnar portion is inserted such that the annular hole portion is on the tip side and the through hole of the seal portion is on the root side, and at least a part of the annular shape is In a state of being locked by the locking portion, the ring shape has a portion extending radially outward from the locking portion, and the extended portion from the columnar portion of the seal portion. The clamp according to claim 1, wherein the clamp is an annular portion that suppresses falling off.   The clamp according to claim 1 or 2, wherein a radial outer edge shape of the seal portion is larger than a radial outer edge shape of the dish-like portion in a state where the columnar portion is inserted into the through hole of the seal portion.   An attachment hole in which the columnar portion is formed on the attachment object in a state where the engagement portion is inserted into the through hole of the seal portion, and the suppression portion is sandwiched between the engagement portion and the seal portion. The clamp according to any one of claims 1 to 3, wherein when being inserted into a part, the locking part is locked in the mounting hole, and the clamp is attached to the mounting target.   In the state where the columnar part is inserted into the through hole of the seal part and the suppression part is sandwiched between the locking part and the seal part, the radial outer edge shape of the suppression part is the diameter of the seal part. The clamp according to any one of claims 1 to 4, wherein the clamp is smaller than both the outer peripheral shape in the direction and the outer peripheral shape in the radial direction of the dish-shaped portion.

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