JP6188211B2 - Mounting structure and mounting method - Google Patents

Description

  The present invention relates to a structure for attaching an attachment object to an attachment member using a screw.

  Conventionally, members have been attached to each other using screws in various fields. Patent Document 1 discloses a method of fixing with a screw in a state where a wedge material (wedge plate) is sandwiched between two members.

  Patent Document 2 discloses a method in which two wedge plates are sandwiched between steel materials and the steel materials are fixed with screws having a special shape. More specifically, these wedge plates are formed with long holes, which are through holes, and the diameter of the long holes increases from one end to the other end in the longitudinal direction. These wedge plates are configured such that the thickness increases as the elongated hole increases in diameter. Moreover, the screw | thread of patent document 2 is provided with the taper part which a diameter becomes large as it approaches a head part between a screw groove and a head part.

  With this configuration, when the screw is inserted with two wedge plates sandwiched between the steel materials, the diameter of the elongated hole corresponds to the diameter of the taper portion of the screw, and the wedge The board slides. Thereby, since the thickness of the wedge board pinched | interposed into steel materials becomes large, a friction force can be raised and steel materials can be joined.

  For example, a screw is usually used when a predetermined member (attachment) is attached to the inside of the housing. In this case, for example, there are a method of attaching a screw from the inside of the housing as shown in FIG. 6A and a method of attaching a screw from the outside of the housing as shown in FIG. 6B.

Japanese Patent No. 3358182 Japanese Patent No. 3502892

  However, in the method shown in FIG. 6A, when the casing is small or many other members are arranged inside the casing, work using a tool (such as an electric screwdriver) is performed due to the work space. It becomes difficult. In addition, when many other members are arranged, it is necessary to attach them to the inside of the housing after removing them once and reattach the members removed earlier.

  In the method shown in FIG. 6B, for example, when there is not enough space outside the housing, the attachment object cannot be attached. Therefore, since it is necessary to design in consideration of the position of the attached object so that a sufficient space can be secured during the work, the degree of freedom in design is reduced.

  In Patent Document 2, by attaching a screw, the wedge plate moves in a direction perpendicular to the screw insertion direction. However, the purpose of Patent Document 2 is to connect the steel plates, and the wedge plate is a member for assisting it. It is not a target for installation. Further, the wedge plate of Patent Document 2 does not move any more when the steel materials are fixed by sliding and increasing the thickness. That is, the wedge plate of Patent Document 2 does not always move to a predetermined position.

  The present invention has been made in view of the above circumstances, and its main purpose is an attachment structure composed of a base portion such as a housing and an attached object, without reducing workability. An object of the present invention is to provide a configuration in which an attachment object is accurately moved to a predetermined position or pressed against a predetermined member.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

According to the 1st viewpoint of this invention, the attachment structure of the following structures is provided. That is, this attachment structure includes a base portion, an attachment object, and a screw. A screw hole is formed in the base portion. An insertion hole which is a through hole is formed in the attached object. The screw is attached to the screw hole through the insertion hole, and a tapered portion having a diameter that increases as the head portion is approached is formed between the screw groove and the head portion. The On the inner wall of the insertion hole, a planar portion is formed that is parallel to the insertion direction of the screw and perpendicular to a predetermined direction. By attaching the screw to the insertion hole in a state of being inserted into the insertion hole, the tapered portion presses the planar portion of the inner wall of the insertion hole in a predetermined direction, and the attached object is Move to a predetermined position in a predetermined direction .

  Thereby, a to-be-attached object can be moved perpendicularly to the insertion direction of a screw only by attaching a screw. In addition, the attachment object can be moved to a position (predetermined position) determined by the shape of the insertion hole or the tapered portion.

  In the attachment structure, it is preferable that the attached object is pressed against the base portion or another member by moving the attached object.

  Thereby, even if it is a case where a screw cannot be attached in the pressing direction of a to-be-attached object due to space etc., an to-be-attached object can be pressed to a predetermined member without losing workability.

  In the mounting structure, a section of the insertion hole cut by a plane perpendicular to the insertion direction of the screw has a linear portion, and the tapered portion presses the linear portion. It is preferable that the attached object moves.

  As a result, even if there is a slight deviation in the positional relationship between the tapered portion and the insertion hole, the pressing force by the tapered portion acts only in the direction in which the attachment is moved, so the attachment is moved smoothly. can do.

  In the mounting structure, it is preferable that a cross-sectional shape of the insertion hole cut along a plane perpendicular to the insertion direction of the screw is a shape in which a part of a circle is a straight line.

  Thereby, said effect is realizable with a simple shape.

  In the attachment structure, it is preferable that the attachment object is fixed to the base portion by being sandwiched between the head portion and the base portion.

  Thereby, movement (pressing) and fixation of a to-be-attached object can be performed with one screw.

  In the mounting structure, the base portion has a taper portion accommodating portion in which the taper portion of the screw is accommodated on the side of the attached object with respect to the screw hole and larger in diameter than the screw hole. Is preferably formed.

  Thereby, even if it is a case where the thickness of a to-be-attached object is small, the said to-be-attached object can be pinched and fixed, without a taper part becoming obstructive.

  In the mounting structure described above, the following configuration is preferable. That is, the attached object includes a heat radiating surface for releasing the heat of the attached object to the outside. As the attached object moves, the heat radiating surface is pressed against the base portion or another member.

  Thereby, since a heat radiating surface can be reliably pressed against another member etc., a high heat radiating effect is realizable.

  In the mounting structure described above, the following configuration is preferable. That is, the heat radiating surface is a portion for releasing heat generated in the printed circuit board to the outside. As the attachment object moves, the heat radiating surface is pressed against the wall portion of the housing that houses the printed circuit board.

  Thereby, the attachment structure which can efficiently radiate the heat generated in the substrate can be realized. In addition, it is difficult to attach a screw from the inside of the housing to the wall, because of the work space. Therefore, good workability can be realized.

According to the 2nd viewpoint of this invention, the attachment structure of the following structures is provided. That is, this attachment structure includes a base portion, an attachment object, and a screw. A screw hole is formed in the base portion. An insertion hole which is a through hole is formed in the attached object. The screw is attached to the screw hole through the insertion hole, and a tapered portion having a diameter that increases as the head portion is approached is formed between the screw groove and the head portion. The On the inner wall of the insertion hole, a planar portion is formed that is parallel to the insertion direction of the screw and perpendicular to a predetermined direction. When the screw is attached to the screw hole, the attachment object is pressed in a predetermined direction and moved to a predetermined position in the predetermined direction. The insertion hole is larger than at least the small diameter portion of the thread groove and the tapered portion. Further, when the attachment object is attached to the base portion, the portion having the largest diameter of the tapered portion and the flat portion of the inner wall of the insertion hole are in contact with each other.

According to the third aspect of the present invention, a screw that is a through hole is formed using a screw in which a taper portion whose diameter increases as the head portion is approached is formed between the screw groove and the head portion. An attachment method for attaching an object to be attached having a hole to a base portion having a screw hole is provided. On the inner wall of the insertion hole, a planar portion is formed that is parallel to the insertion direction of the screw and perpendicular to a predetermined direction. In this attachment method, the screw hole and the insertion hole are aligned and the screw is inserted and attached to the screw hole, so that the tapered portion has the plane portion of the inner wall of the insertion hole in a predetermined direction. is pressed, the including the step of moving the to a predetermined position in the direction of the attached object is predetermined.

  As described above, the object to be attached can be moved in the direction perpendicular to the screw insertion direction simply by attaching the screw. Moreover, an attachment thing can be moved to a desired position by adjusting the shape of an insertion hole or a taper part.

The exploded perspective view which shows the structure and attachment position of a housing | casing and a board | substrate unit. The perspective view which shows a mode that a board | substrate unit is attached to a housing | casing using a screw | thread. The perspective view and side view which show the shape of a screw | thread. Sectional drawing which shows a mode that a board | substrate unit is attached to a housing | casing using a screw | thread. Sectional drawing which shows the relationship between the shape of an insertion hole, and the direction of the force which an insertion hole receives from a taper part. The perspective view which shows a mode that a to-be-attached object is attached to the wall part of a housing | casing in a prior art example.

  Next, embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, the mounting structure of the present invention is applied to mounting of a housing (base part) 10 and a substrate unit (attachment) 20. Hereinafter, after explaining the structure of each part, the attachment structure of this embodiment is demonstrated.

  As shown in FIG. 1, the housing 10 is a box-shaped member and includes a bottom portion 11 and four side wall portions 12. Although not shown, the housing 10 includes a lid portion that closes the open portion of the housing 10 so as to face the bottom portion 11.

  Fins 13 are formed on the outside of some of the side wall portions 12. The fin 13 has a configuration in which a plurality of plate-like protrusions are arranged at intervals. With this configuration, the surface area of the fin 13 is increased, and the heat transferred to the side wall portion 12 can be effectively radiated.

  A stepped portion 14 is formed inside some of the side wall portions 12. The step portion 14 is a portion for attaching a substrate unit 20 described later. The stepped portion 14 is formed with a contact surface 15 for transferring the heat generated in the substrate unit 20 to the fins 13 to dissipate the heat.

  A plurality of screw holes 16 for attaching the substrate unit 20 are formed in the step portion 14 and the bottom portion 11 in the vicinity of the step portion 14. Further, as shown in FIG. 4A and the like, a taper accommodating portion 17 which is a portion having a diameter larger than that of the screw hole 16 is formed on the surface side of the screw hole 16 (upper side of FIG. 4A). (So-called counterbore processing).

  Next, the substrate unit 20 will be described. As shown in FIG. 1, the board unit 20 includes a printed board 21, a pressing member 22, and an attachment member 23.

  A large number of electronic components are arranged on the printed circuit board 21 and a circuit for electrically connecting the electronic components is formed. Electronic parts include highly heat-generating electronic parts such as diodes. The heat generated by the highly heat-generating electronic component moves to the mounting member 23 when the pressing member 22 presses the heat generating portion against the mounting member 23.

  The attachment member 23 is a member for attaching the board unit 20 to the step portion 14 of the housing 10. An insertion hole 24 is formed in the attachment member 23 at a position corresponding to the screw hole 16 formed in the bottom part 11 and the step part 14. Accordingly, a plurality of insertion holes 24 are formed at different heights. The insertion hole 24 is a hole having a shape in which a part of a circle is a straight line as shown in FIG.

  In addition, a heat radiating surface 25 is formed on the attachment member 23 at a position in contact with the contact surface 15. Here, in order to realize high heat dissipation efficiency, it is necessary to increase the contact area between the contact surface 15 and the heat dissipation surface 25.

  Next, the screw 30 for attaching the substrate unit 20 to the housing 10 will be described. As shown in FIG. 3, a screw groove 31, a tapered portion 32, a flat portion 33, and a head portion 34 are formed in the screw 30.

  The screw groove 31 is a portion where the screw groove is cut. The tapered portion 32 is formed between the screw groove 31 and the head portion 34 (flat portion 33), and is a tapered portion whose diameter increases as the head portion 34 is approached. The small diameter portion (the smallest diameter portion) of the taper portion 32 has the same diameter as that of the screw groove 31, and the large diameter portion (the largest diameter portion) of the taper portion 32 has a smaller diameter than the head portion 34. .

  The flat portion 33 is a portion having a constant diameter formed between the tapered portion 32 and the head portion 34. The head part 34 is a part formed so as to form a step between the flat part 33 and has a larger diameter than the flat part 33.

  Next, the process of attaching (fixing) the substrate unit 20 to the housing 10 with the screws 30 and the attachment structure 1 will be described.

  First, as shown in FIG. 1, the mounting member 23 is aligned with the stepped portion 14, and the positions of the insertion hole 24 and the screw hole 16 are aligned.

  Next, as shown in FIG. 2, the screw 30 is inserted into a portion where the positions of the insertion hole 24 and the screw hole 16 are aligned and rotated to attach the screw 30. At this time, each member operates as follows.

  That is, as shown in FIG. 4A which is an AA cross-sectional view of FIG. 2, the screw 30 is inserted into the insertion hole 24 and the screw hole 16 and rotated, thereby rotating the tapered portion 32 and the insertion hole 24. In contact with the inner wall. In this state, it is assumed that the heat radiation surface 25 and the contact surface 15 are not yet in contact.

  By further rotating the screw 30 in this state, the tapered portion 32 presses the inner wall of the insertion hole 24 to the right side (the outside of the housing 10) in FIG. 4 as shown in FIG. Thereby, the heat radiation surface 25 can be brought close to the contact surface 15.

  Then, by further rotating the screw 30, the heat radiating surface 25 can be pressed against the contact surface 15 as shown in FIG. Thereby, the contact area of the thermal radiation surface 25 and the contact surface 15 can be enlarged, and high thermal radiation efficiency can be implement | achieved. In particular, in the present embodiment, since the plurality of screw holes 16 and the insertion holes 24 are formed at different heights, the heat radiating surface 25 can be uniformly pressed against the contact surface 15.

  Further, by attaching the screw 30, the attachment member 23 can be sandwiched between the head portion 34 and the housing 10, so that the board unit 20 can be attached (fixed) to the housing 10.

  In this embodiment, since the thickness of the attachment member 23 is small, the attachment member 23 can be fixed to the step portion 14 by forming the taper accommodating portion 17 in the step portion 14. When the thickness of the attachment member 23 is large, the taper accommodating portion 17 may not be formed.

  Thus, since the attachment member 23 is pressed and moved by the taper portion 32, the large diameter portion of the taper portion 32 comes into contact with the inner wall portion of the step portion 14 after the attachment member 23 is attached. Therefore, as shown in FIG. 4C, when the difference in diameter between the center of the screw 30 (screw hole 16) and the large diameter portion of the tapered portion 32 is L1, the distance from the center of the screw 30 is L1. The inner wall portion of the insertion hole 24 can always be positioned at the position. Thereby, the attachment member 23 (as a result, the board | substrate unit 20) can be moved to the predetermined position by performing attachment by said method.

  Next, the circular insertion hole 40 which is a general shape and the insertion hole 24 of the present embodiment in which a part of the circle is a straight line will be compared and described. FIG. 5 is a cross-sectional view showing a state in which the screw 30 is cut along a plane perpendicular to the insertion direction of the screw 30, as in the BB cross-sectional view of FIG. 2.

  In the case of the circular insertion hole 40, as shown in FIG. 5A, the positions of the insertion hole 40 and the tapered portion 32 in the vertical direction in FIG. 5 (the direction perpendicular to the moving direction of the mounting member 23) are the same. If it does, the mounting member 23 can be moved without any particular problem. However, as shown in FIG. 5B, when the position of the taper portion 32 and 40 in the vertical direction in FIG. 5 are misaligned, the taper portion 32 presses the mounting member 23 in a direction other than the moving direction. The attachment member 23 may not move smoothly.

  On the other hand, the insertion hole 24 of the present embodiment has a shape in which a part of the circle is a straight line, as shown in FIG. Further, this straight line is formed on the moving direction side of the attachment member 23. Accordingly, even if the mounting member 23 and the tapered portion 32 in the vertical direction in FIG. 5 are misaligned, the tapered portion 32 presses the mounting member 23 only in the moving direction. Smooth movement can be realized.

  As described above, the attachment structure 1 includes the housing 10, the board unit 20, and the screws 30. A screw hole 16 is formed in the housing 10. The board unit 20 is formed with insertion holes 24 which are through holes. The screw 30 is attached to the screw hole 16 through the insertion hole 24, and the taper 30 has a taper whose diameter increases between the screw groove 31 and the head portion 34 as the head portion 34 is approached. Part 32 is formed. When the screw 30 is inserted into the insertion hole 24 and attached to the screw hole 16, the taper portion 32 presses the inner wall of the insertion hole 24, and the substrate unit 20 moves to a predetermined position.

  Thereby, the substrate unit 20 can be moved perpendicularly to the insertion direction of the screw 30 only by attaching the screw 30. Further, the substrate unit 20 can be moved to a position (predetermined position) determined by the shape of the insertion hole 24 or the tapered portion 32.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  In the above description, the case where the casing 10 is used as the base portion and the substrate unit 20 is used as the attachment object has been described. However, the present invention can also be applied to a case where other members are attached.

  In the above description, the heat generated in the printed circuit board 21 is transmitted to the housing 10 to dissipate the heat. However, the heat generated outside the printed circuit board may be dissipated, and the generated heat may be transmitted to the housing. The structure which transmits to other than and dissipates heat may be sufficient.

  It is possible to further improve the adhesion between the contact surface 15 and the heat dissipation surface 25 by attaching a sheet-like member having cushioning properties and heat conductivity to the contact surface 15 or the heat dissipation surface 25.

  The structure which presses a to-be-attached object to a base part can be used for uses, such as waterproofing or a firm connection other than heat dissipation, for example.

  As described above, since the attachment position of the attachment can be adjusted by the configuration of the present invention, the present invention can be used not only to press the attachment to another member but also to adjust the position of the attachment. .

1 Mounting structure 10 Housing (base part)
DESCRIPTION OF SYMBOLS 11 Bottom part 12 Side wall part 13 Fin 14 Step part 15 Contact surface 16 Screw hole 17 Taper accommodating part 20 Substrate unit (attachment)
DESCRIPTION OF SYMBOLS 21 Printed circuit board 22 Pushing member 23 Mounting member 24 Insertion hole 25 Heat radiation surface 30 Screw 31 Screw groove 32 Tapered part 33 Flat part 34 Head part

Claims (14)

A base part in which a screw hole is formed;
A to-be-attached object in which an insertion hole which is a through hole is formed;
A screw that is attached to the screw hole through the insertion hole and has a taper portion that increases in diameter as it approaches the head portion between the screw groove and the head portion;
With
On the inner wall of the insertion hole, a plane portion that is parallel to the insertion direction of the screw and perpendicular to a predetermined direction is formed,
By attaching the screw to the insertion hole in a state of being inserted into the insertion hole, the tapered portion presses the planar portion of the inner wall of the insertion hole in a predetermined direction, and the attached object is An attachment structure that moves to a predetermined position in a predetermined direction . The mounting structure according to claim 1,
The attachment structure is characterized in that the attachment object is pressed against the base portion or another member by moving the attachment object. The mounting structure according to claim 2,
The attachment structure is characterized in that the attachment object is pressed against a surface of the base portion different from a surface on which the screw hole is formed. The mounting structure according to any one of claims 1 to 3 ,
In the cross section of the insertion hole cut by a plane perpendicular to the insertion direction of the screw, only one linear portion is formed, and the linear portion corresponds to the planar portion. And mounting structure. The mounting structure according to claim 4 ,
The mounting structure is characterized in that a cross-sectional shape of the insertion hole cut by a plane perpendicular to the insertion direction of the screw is a shape in which a part of a circle is a straight line. The mounting structure according to any one of claims 1 to 5 ,
The attachment structure is fixed to the base portion by being sandwiched between the head portion and the base portion. The mounting structure according to claim 6 ,
The base portion is formed with a tapered portion accommodating portion that is larger in diameter than the screw hole and accommodates the tapered portion of the screw, closer to the attachment side than the screw hole. A characteristic mounting structure. The mounting structure according to any one of claims 1 to 7 ,
The attached object includes a heat radiating surface for releasing the heat of the attached object to the outside,
The attachment structure is characterized in that the heat dissipating surface is pressed against the base portion or another member by moving the attachment object. The mounting structure according to claim 8 ,
The heat radiating surface is a part that releases heat generated in the printed circuit board to the outside,
The mounting structure is characterized in that the heat dissipating surface is pressed against a wall portion of a housing that accommodates the printed circuit board by moving the attachment object. The mounting structure according to claim 9,
The attached object is a board unit including the printed board and an attachment member on which the printed board is attached to the base portion and the heat dissipation surface is formed.
The mounting structure, wherein the base portion is the casing. The mounting structure according to claim 10,
The heat dissipation surface allows the heat generated in the printed circuit board to escape to the outside through the housing. The mounting structure according to any one of claims 1 to 11,
The screw has a flat portion between the taper portion and the head portion,
The diameter of the flat portion is constant and is the same as the large diameter side of the tapered portion,
In a cross section cut through a plane perpendicular to the radial direction of the screw hole passing through the center of the screw hole, the flat portion is located in the insertion hole, and the diameter of the flat portion and the diameter of the insertion hole, A mounting structure characterized by substantially the same. A base part in which a screw hole is formed;
A to-be-attached object in which an insertion hole which is a through hole is formed;
A screw that is attached to the screw hole through the insertion hole and has a taper portion that increases in diameter as it approaches the head portion between the screw groove and the head portion;
With
On the inner wall of the insertion hole, a plane portion that is parallel to the insertion direction of the screw and perpendicular to a predetermined direction is formed,
When the screw is attached to the screw hole, the attached object is pressed in a predetermined direction and moved to a predetermined position in the predetermined direction,
The insertion hole is larger than at least the screw groove and the small diameter portion of the tapered portion,
When the attachment object is attached to the base part, the part having the largest diameter of the taper part and the flat part of the inner wall of the insertion hole are in contact with each other. . Using a screw in which a taper portion whose diameter increases as it approaches the head portion is formed between the screw groove and the head portion, the attachment object in which the insertion hole which is a through hole is formed is screwed. A mounting method for attaching to a base portion in which a hole is formed,
On the inner wall of the insertion hole, a plane portion that is parallel to the insertion direction of the screw and perpendicular to a predetermined direction is formed,
By aligning the screw hole and the insertion hole and inserting the screw and attaching it to the screw hole, the tapered portion presses the planar portion of the inner wall of the insertion hole in a predetermined direction , An attachment method comprising the step of moving the attachment object to a predetermined position in a predetermined direction .

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