JP4866825B2 - Mounting structure of parts to plate - Google Patents

Description

  The present invention relates to a mounting structure for mounting a part on a plate, and particularly to a mounting structure for mounting a part having a shape in which an insertion shaft projects from a head to a relatively thin plate.

Japanese Patent Laid-Open No. 2002-104096 (Patent Document 1) discloses a mounting structure in which a part having a shape in which an insertion shaft projects from the head is inserted from one side and attached in a retaining state.
As shown in FIG. 6, this relates to the mounting structure of the molding (M) provided at the joint of two metal plates constituting the roof panel (35) of the automobile, and the flat head of the molding (M). The insertion shaft (30) protruding from the back surface of the portion (3) is inserted into the bag-like portion (31) that opens upward, and a plurality of stages of locking provided on the insertion shaft (30) By engaging the peripheral edge of the claw (32) (32) into the locking hole (34) of the locking plate (33) provided at the open end of the bag-like part (31) from below, the molding (M) Can be attached to the roof panel (35) so as not to be detached upward.

In the present invention, even if there is variation in the depth of the molding mounting groove (36), any one of the locking claws (32) (32) provided over a plurality of steps is used as the locking hole (34). The molding (M) can be securely attached to the roof panel (35) in a retaining state regardless of the depth of the molding mounting groove (36). Further, when the insertion shaft (30) is inserted into the bag-like portion (31), the plurality of locking claws (32), (32) are brought into a substantially tight fit state within the bag-like portion (31). Thus, the insertion shaft (30) does not rattle in the bag-like portion (31).
Japanese Patent Laid-Open No. 2002-104096 JP 10-333571 A

  As in the conventional example described above, the insertion shaft (30) in which the locking claw (32) protrudes in the radial direction has a shape with a shape protruding from the back surface of the head (3). In the mounting structure in which the insertion shaft (30) is inserted into a mounting hole having a predetermined depth as in the bag-shaped portion (31), the insertion shaft (30) is inserted into the mounting hole. As a result, the peripheral edge of the latching claw (32) substantially comes into contact with the inner peripheral wall of the mounted hole, and the insertion shaft (30) is supported in a substantially upright state in the mounted hole. For this reason, the component can be mounted in a stable state without shaking in the state of being mounted in the mounted hole.

  However, like the conventional molding (M), a part having a shape in which the insertion shaft (30) with the locking claw (32) protrudes from the back surface of the head (3) has a predetermined depth. In the case of attaching to a thin plate body that does not have a certain mounting hole from the front side, if the locking claw (32) is forcibly inserted into the locking hole provided in the plate body, the locking claw (32) The parts can be attached in a retaining state by being engaged with the periphery of the engaging hole, but there is a disadvantage that rattling occurs after the attachment.

This is because the size of the locking hole into which the locking claw (32) can be inserted is naturally larger than the diameter of the insertion shaft (30), so that the insertion shaft (30) Is inserted to the base end, a gap is generated between the base end and the locking hole, and the insertion shaft (30) after being inserted into the locking hole is Since the back side of the plate body is not supported at all from the periphery, when such a component is attached to the plate body, it is formed between the base end portion of the insertion shaft (30) and the periphery of the locking hole. Shaking will occur only by the amount of gap that is left.
An object of the present invention is to make it possible to attach a component having a structure in which an insertion shaft protrudes from the back surface of the head to a plate body without rattling and in a retaining state.

(1) The technical means of the invention according to claim 1 for solving the above-mentioned problem is as follows: “A component having a structure in which an insertion shaft projects from the back surface of the head is provided in a locking hole provided in the plate body. A mounting structure for mounting in a retaining state,
The locking hole is a round hole,
The insertion shaft includes a shaft portion having a diameter smaller than the diameter of the round hole, and a locking flange projecting around the shaft portion,
A plurality of ribs protruding along the axis of the shaft portion are provided at predetermined intervals in the circumferential direction of the shaft portion at least in the vicinity of the base end portion of the shaft portion.
The locking flange is configured in a polygonal shape of a size that can be forced into the round hole,
The rib is provided at a portion other than the corner of the locking flange,
The shortest distance from the back surface of the head to the locking flange is set to be equal to or greater than the thickness of the plate body,
The protruding height of the rib is set to be equal to or less than the difference between the radius of the round hole and the radius of the shaft portion,
The rib is inclined so that the protruding height gradually increases toward the base end side of the shaft portion, and
That is, when the insertion shaft is inserted into the round hole up to the final insertion position where the back surface of the head reaches the surface of the plate body, it is projected to the height reaching the periphery of the round hole.

The technical means operates as follows.
An insertion shaft in which a polygonal locking flange is extended around the shaft portion is inserted into the round hole from the front side of the plate body. Since the locking flange is provided so that it can be forcibly inserted into the round hole, if the insertion shaft is press-fitted into the round hole, the locking flange is inserted into the back side of the round hole. In addition, once the locking flange inserted into the back side of the round hole, even if the head is pulled from the front side of the plate body, any one of the polygonal corner portions constituting the locking flange is the round hole. It is difficult to pull out the insertion shaft from the round hole.

When the insertion shaft is inserted into the round hole up to its base end, the plate body is located between the base end and the locking flange, and the shaft constituting the base end is in the round hole. It becomes a relationship. The shaft portion is smaller in diameter than the round hole, and a gap corresponding to the difference between the radius of the round hole and the radius of the shaft portion is generated between the shaft portion and the round hole. A rib is projected from the shaft portion so as to project. For this reason, in the formation area of the rib, the gap becomes smaller by the protrusion height of the rib.
In addition, since the rib is not provided at a polygonal corner portion constituting the locking flange, when the insertion shaft is inserted into the round hole, for example, the corner portion is a peripheral edge of the round hole. In the case of being forcedly deformed by coming into contact with the surface, there is no hindrance to the deformation.
In order to reduce the radial gap between the shaft portion and the round hole, the height of the entire rib is made to substantially match the difference in radius between the shaft portion and the round hole, or the diameter of the shaft portion is set to the round hole. Although it may be possible to make the diameter substantially coincide with the diameter, it is difficult to insert the shaft portion into the round hole up to the proximal end portion. Therefore, by inclining a plurality of ribs provided along the axis of the shaft portion so as to gradually increase toward the base end portion of the shaft portion, the shaft portion is rounded from the distal end side where the rib height is low. As the insertion shaft is inserted deeper into the round hole, the gap between the shaft portion and the round hole becomes smaller. The gap between the rib and the peripheral edge of the round hole is set so that the insertion shaft is inserted into the round hole up to the base end.

(2) The invention according to claim 2 is the invention according to claim 1, wherein a plurality of the insertion shafts are provided, and the round holes are provided at positions of the plate body corresponding to the insertion shafts. If each insertion shaft is made to correspond to each round hole of the plate body and each of them is inserted at the same time, depending on the number of insertion shafts, the parts can be attached to the plate body. The stability and certainty of the are improved.

(3) The invention according to claim 3 is the invention according to claim 2, wherein “the insertion shafts are inclined in directions away from each other or in directions close to each other”. The degree of inclination is negligible, and the insertion shaft can be forcedly inserted into the round hole up to its base end without hindrance.

(4) The invention according to claim 4 is the above-mentioned invention, wherein “the insertion shaft is provided at a position deviated from the center of the head”. The insertion shaft is provided in a range corresponding to the upper area of the pattern rather than the center of the back surface of the head. When there is only one insertion shaft, it may be provided on the vertical center line above the center. When there are two insertion shafts, each position is above the center and symmetrical with respect to the vertical center line. It should be provided in. When attaching the parts, support the head so that the insertion shaft is positioned above the center of the head, and insert the insertion shaft into the round hole of the plate in that position, so that the surface of the head The parts can be attached to the plate in the correct posture without turning the pattern upside down.

The present invention has the following specific effects.
In the invention according to claim 1, by simply inserting the insertion shaft into the round hole, the component can be attached to the plate body in a state of being prevented from being removed only from the front side, and the proximal end of the shaft portion of the insertion shaft Since a plurality of ribs are provided on the portion to narrow the gap between the shaft portion and the round hole, rattling of the insertion shaft in a state of being inserted into the round hole can be suppressed as much as possible. In this way, it is possible to attach the component composed of the head and the insertion shaft to the plate body without rattling and in a retaining state.
In addition, it is possible to press the rib against the periphery of the round hole in a state where the shaft portion of the insertion shaft is inserted into the round end up to the base end portion. It can be surely prevented.

  Moreover, according to the invention which concerns on Claim 2, the said component can be attached to a board | plate body, and it is the state attached, by inserting several insertion shafts in a corresponding round hole, respectively, without striking one layer. Inadvertent rotation of the component in the above can also be prevented.

  Moreover, according to the invention which concerns on Claim 3, even if it can forcibly insert into the round hole the several insertion shaft each inclined in the predetermined direction from the front side of a plate, it is difficult to extract. is there. Therefore, it is possible to more reliably prevent the parts from falling off.

  According to the invention according to claim 4, for example, in the case where an emblem in which a pattern having a top and bottom is drawn on the surface of the head is attached to the front plate of the instrument, the back surface of the emblem corresponding to the upper region of the pattern An insertion shaft is provided in If the insertion shaft is inserted into the round hole while maintaining the position where the insertion shaft is located at the upper part of the emblem, the emblem can be placed in the correct posture without turning the head pattern upside down. Can be attached to a plate. In this way, it is possible to reliably prevent a mistake in attaching the emblem upside down.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
In the embodiment of the present invention, a metal front plate (2) that closes the front open part of the main body case of the outdoor water heater is adopted as the plate body, Two round holes (20) and (20) are formed by punching in the center of the front plate (2).
As shown in FIG. 1, from the periphery of the front plate (2), a joining flange (21) for joining with the main body case protrudes in the vertical and horizontal directions, and in the vicinity of the upper end, a horizontally long exhaust hole is provided. (22) is formed. As shown in FIG. 2 , the vertical center portion below the exhaust hole (22) is set one step lower than both side portions, and the central low portion is located at the upper center of the central low portion (23). A circular recess (24) that is one step lower than (23) is provided. The two round holes (20) and (20) are formed in a parallel state in the horizontal direction at a predetermined interval in a region slightly above the center of the recess (24). An emblem (1) made of a resin such as ABS or ASA is mounted on the recess (24) as a component comprising a head (10) and a plug shaft (11).

As shown in FIG. 3 and FIG. 4, the emblem (1) as a reference example is a head (10) which has a disk shape of a size just fitted into the recess (24) and protrudes in an arc shape on the surface (10a) side. ) And two insertion shafts (11) and (11) that are respectively inserted into the round holes (20) and (20) from the flat back surface (10b) of the head (10). Has been.
On the front surface (10a) of the emblem (1), a pattern that determines the top and bottom of the emblem, such as a manufacturer's mark or emblem, is drawn, and the difference is slightly above the center of the back surface (10b). The insertion shafts (11) and (11) protrude so as to be parallel in the horizontal direction. The distance between the insertion shafts (11) and (11) is made to coincide with the distance between the round holes (20) and (20).

The plug shafts (11) and (11) have a shaft portion (12) inclined slightly (1 to 2 degrees) in directions away from each other, and a radial direction about the shaft portion (12). The locking flanges (13a) to (13e) are formed in five steps, which are projected on the top and bottom of the emblem (1). The orientation is such that the sides are located.
The size of the square is set such that each corner is slightly in contact with the peripheral edge of the round hole (20) (20), and by pressing the insertion shaft (11) forcibly, the locking The flanges (13a) to (13e) can be inserted into the round holes (20) and (20).
Between the base end portion of the shaft portion (12) and the locking flange (13a) positioned closest to the base end portion, the shaft portion (12) projects in the vertical and horizontal directions and extends along the axial direction. Four ribs (14) extending in a protruding manner are provided. The height of each rib (14) is made substantially equal to the distance from the outer peripheral surface of the shaft portion (12) to each side of the locking flange (13a).
The distance from the back surface (10b) of the head (10) to the locking flange (13a) is set to be greater than the thickness of the front plate (2).

  To attach the emblem (1) of the above shape to the front plate (2) of the water heater, place the head (10) so that the plug shaft (11) (11) is located at the upper part of the emblem (1). The insertion shafts (11) and (11) correspond to the round holes (20) and (20) of the front plate (2), and the locking flange (13e) located at the tip of the shaft portion (12) in order. Insert into the round hole (20). Since the size of the square constituting each of the locking flanges (13a) to (13e) is as described above, the locking flanges (13a) to (13e) are round holes ( The four corners of the square abutting the periphery of 20) are deformed while being forcedly inserted into the round hole (20), and can be projected to the back side of the front plate (2) as shown in FIG. .

  By inserting the two insertion shafts (11) and (11) into the two round holes (20) and (20), respectively, so that they are located in the upper part of the head (10), the recesses in the front plate (2) The emblem (1) attached to (24) has no failure such that the pattern formed on the surface (10a) of the head (10) is turned upside down, and the head (10) There is no inconvenience that will rotate.

  Since the emblem (1) is attached in a state where the head (10) is accommodated in the recess (24), it is difficult to pull out the head (10) by mischief or the like. Moreover, even if the insertion shaft (11) is displaced in the direction to escape from the round hole (20), as described above, the shaft portions (12) and (12) are inclined slightly away from each other. At the same time, since the locking flanges (13a) to (13e) are forcibly inserted, the insertion shafts (11) and (11) once inserted into the round holes (20) and (20) One of the corners of (13a) is caught on the peripheral edge of the round holes (20) and (20), and does not easily escape. Therefore, even if the head (10) is pulled from the front side of the front plate (2), the emblem (1) cannot be removed. Even if the locking flange (13a) closest to the base end escapes from the round hole (20), the four locking flanges (13b) to (13e) still remain, so It is unlikely that the entire shaft (11) escapes from the round hole (20). Furthermore, since the two insertion shafts (11) are provided on the left and right sides, both of the insertion shafts (11) and (11) escape from the round holes (20) and (20) and the emblem (1). Cannot fall off the front plate (2).

  In this way, the emblem (1) has no inconvenience that it is misplaced upside down with respect to the front plate (2) of the water heater. Only by the work from the front side, it is securely attached in a mode of being accommodated in the recess (24) provided in the front plate (2).

  In the attached state, four ribs (14) project from the base end of the shaft (12) located in the round hole (20), as shown in FIG. In addition, the gap that was originally generated around the shaft portion (12) by the distance (W1) from the outer peripheral surface of the shaft portion (12) to the peripheral edge of the round hole (20) is from the rib (14) to the round hole ( Since the distance (W2) to the periphery of 20) is reduced, the degree of shakiness of the insertion shaft (11) in the round hole (20) decreases.

In the above reference example , the rib (14) is set to have a uniform protruding height from the locking flange (13a) side to the base end side of the shaft portion (12), but in the embodiment of the present invention. as shown in FIG. 5, and a shape inclined to be higher toward the proximal end portion of the shaft portion (12). In this case, the height of the rib (14) on the side of the locking flange (13a) is the distance from the outer peripheral surface of the shaft portion (12) to each side of the square constituting the locking flange (13a). In addition, the base portion of the shaft portion (12) protrudes to the height reaching the peripheral edge of the round hole (20) beyond the sides of the square. When the insertion shaft (11) on which the ribs (14) and (14) having such inclined surfaces are formed is inserted into the round hole (20) of the front plate (2), the ribs (14) and (14) are The insertion shaft (11) until the final insertion position where the back surface (10b) of the head (10) reaches the surface of the front plate (2) is inserted without any trouble following the locking flange (13a) Is inserted into the round hole (20), the base end of the rib (14) protruding to the height reaching the periphery of the round hole (20) is forced into the round hole (20). It becomes an aspect. Thereby, rattling of the insertion shaft (11) is reliably prevented.
In the above reference examples and embodiments, square flanges are projected as the locking flanges (13a) to (13e), but may be polygons having a size that can be forcibly inserted into the round holes (20). For example, other shapes may be used. The number of ribs (14) is not limited, but is preferably 3 or more. The rib (14) may be provided in the entire range from the base end portion of the shaft portion (12) to the tip end.

Further, in order to ensure the secure fixing of the emblem (1) to the front plate (2), it is desirable that two or more insertion shafts (11) are provided.
Further, the round hole (20) provided in the front plate (2) may be formed by burring. In this case, the distance from the base end portion of the shaft portion (12) to the locking flange (13a) may be set to be equal to or longer than the standing length of the burring.
In this way, by projecting the rib (14) having a predetermined height at the base end portion of the shaft portion (12) of the insertion shaft (11), the outer peripheral surface of the shaft portion (12) and the front plate (2 ) Formed in the round hole (20) because the gap formed between the round hole (20) and the peripheral edge of the round hole (20) is reduced by the protruding height of the rib (14). The shakiness of the insertion shaft (11) can be suppressed. In this way, even if it is a relatively thin plate that does not have a bag-like part that supports the insertion shaft (11) from the periphery, the parts such as the emblem can be removed with the backlash suppressed. Can be attached in a stopped state.

The front view of the front board as a board of the attachment structure of the component to the board of an embodiment of the invention. XX expanded sectional view of FIG. The side view of the emblem as a component of the reference example of the attachment structure of the component to the board of embodiment of this invention. FIG. 4 is a left side view of FIG. 3. The principal part expanded sectional view which shows the attachment structure of the components to the board of embodiment of this invention . Explanatory drawing of a prior art example.

Explanation of symbols

(1) ・ ・ ・ ・ Parts (emblem)
(10) ... head
(10b) ・ ・ ・ ・ ・ ・ Back
(11) ...
(12) ... ・ Shaft
(13a) to (13e) ・ ・ ・ Locking flange
(14) ... Rib
(2) .... Plate body (front plate)
(20) ・ ・ ・ ・ ・ ・ ・ Locking holes (round holes)

Claims (4)

An attachment structure for attaching a component having a structure in which an insertion shaft protrudes on the back surface of the head in a retaining state to a locking hole provided in the plate body,
The locking hole is a round hole,
The insertion shaft includes a shaft portion having a diameter smaller than the diameter of the round hole, and a locking flange projecting around the shaft portion,
A plurality of ribs protruding along the axis of the shaft portion are provided at predetermined intervals in the circumferential direction of the shaft portion at least in the vicinity of the base end portion of the shaft portion.
The locking flange is configured in a polygonal shape of a size that can be forced into the round hole,
The rib is provided at a portion other than the corner of the locking flange,
The shortest distance from the back surface of the head to the locking flange is set to be equal to or greater than the thickness of the plate body,
The protruding height of the rib is set to be equal to or less than the difference between the radius of the round hole and the radius of the shaft portion,
The rib is inclined so that the protruding height gradually increases toward the base end side of the shaft portion, and
A plate characterized in that , when the insertion shaft is inserted into the round hole, the back surface of the head protrudes to the height reaching the peripheral edge of the round hole until the final insertion position where the back surface reaches the surface of the plate body. Mounting structure of parts to the body.   2. The structure for mounting a part to a plate according to claim 1, wherein a plurality of the insertion shafts are provided, and the round holes are formed at respective positions of the plate corresponding to the insertion shafts. A structure for mounting a part to a plate,   The structure for mounting a component to a plate according to claim 2, wherein the insertion shaft is inclined in a direction away from each other or in a direction close to each other. .   In the attachment structure of the components to the board in any one of Claims 1-3, the said insertion shaft is provided in the position shifted | deviated from the center of the said head. To the board characterized by the above-mentioned. Mounting structure for parts.

Images