JP2018105408A - Connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure capable of easily fitting a pipe member and a member to be fixed at an accurate position.SOLUTION: A connection structure is configured to connect a projection support plate 3 and a pipe member 4 with a connection tool 1, wherein the connection tool includes an enlarged-diameter part 14 inserted into a hole part 30 of the projection support plate 3 and an end part of the pipe member 4, and capable of being enlarged in the pipe member 4 with a bolt 2. The pipe member 4 includes a locking hole 40 on an inner wall. The connection tool 1 includes: a trunk part 10 having a convex part 15 and the enlarged-diameter part 14, which are locked to the projection support plate 3, and capable of being inserted into an oval-shaped insertion port 30; and a flange part 13 larger than the trunk part 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connection structure for connecting and fixing another member to an end of a pipe member.

  Generally, a pipe member may be used for a fixture, and the fixture is assembled by connecting with other members. When the pipe member is connected to other members, the pipe member may be fixed using welding, an adhesive, or the like, but the operation is complicated. As a simple means, a connection structure using bolts may be used.

  As an example of a connection structure using bolts, in a pipe fixing device as in Patent Document 1, a pipe member provided with a projection inside, a bracket (fixed member) provided with a hole, and a pipe member The main part that can be expanded in diameter, the nut that expands the main part by being screwed into the space in the main part by screwing with the bolt (expansion means), and the nut falling in the pipe member It consists of a snap ring to prevent, and a bolt that supports a bracket with a head (a collar) and is screwed into a nut.

  When connecting the pipe member and the bracket using the connection structure using this bolt, the nut and the snap ring are previously arranged and integrated in the space provided in the main part, and then the main part is provided in the bracket. Fit it into the hole, and lightly screw it to the extent that the bolt does not come off the nut, and temporarily fix the main part to the bracket with the bolt. Next, the pipe member is extrapolated to the main part along the positioning groove extending in the axial direction on the outer diameter side of the main part along the protrusion provided on the inner wall of the pipe member. Then, it tightens with a volt | bolt, hold | gripping so that the edge part of a pipe member may contact | abut to a bracket. At this time, the nut arranged in the space part of the main part is drawn toward the head of the bolt, and with the screwing of the bolt by the slit and the inner peripheral side taper provided in the axial direction of the main part The main part is expanded in diameter in the pipe member. Therefore, the main part applies a pressing force toward the inner wall of the pipe member, and the bracket and the pipe member are fixed.

JP 2002-31112 A (page 25, FIG. 1)

  Therefore, in the pipe fixing device using the connection structure of Patent Document 1, since the pipe member was slidable in the axial direction until the main part was finally tightened by the main part, the end of the pipe member was bracketed (fixed) It is necessary to hold it during the final tightening operation so as to contact the member), and the positioning accuracy of the pipe member and the fixed member is low, and the assembly operation is complicated.

  The present invention has been made paying attention to such a problem, and an object of the present invention is to provide a connection structure in which a pipe member and a fixed member can be easily attached at an accurate position.

In order to solve the above problems, the connection structure of the present invention is:
The fixed member and the pipe are inserted into a hole portion of the fixed member and an end portion of the pipe member, and a connecting tool including a diameter-enlarged portion which can be expanded in the pipe member by a diameter-expanding means. A connecting structure for connecting members,
The pipe member includes a locked portion on an inner wall,
The connector includes a locking portion that is locked to the locked portion and the enlarged diameter portion, and a trunk portion that can be inserted into the hole portion, and a flange portion that is larger than the trunk portion. It is characterized by having.
According to this feature, when the body portion of the coupling tool is inserted into the hole of the fixed member and inserted into the end portion of the pipe member, the locking portion of the coupling tool and the locked portion of the pipe member are engaged, The to-be-fixed member is in an appropriate position state held by the flange portion of the connector and the end portion of the pipe member. In this state, the pipe member and the fixed member can be fixed by inserting the diameter-expanding means into the connector, so that the pipe member and the fixed member can be easily attached at an accurate position.

The locking part provided in the trunk part of the connector is a convex part, and the locked part provided in the pipe member is a locking hole fitted into the convex part. .
According to this feature, the convex portion provided in the connector can be fitted into the hole provided in the pipe member, and the movement of the pipe member in the axial direction can be restricted and the rotation can also be restricted.

The said convex part is formed in the enlarged diameter part of the said coupling tool, It is characterized by the above-mentioned.
According to this feature, since the engagement state between the convex portion and the locking hole is strengthened by the diameter expanding means, it is possible to more reliably stop the movement in the axial direction and restrict the rotation.

At least the diameter-enlarged portion of the connector is formed of an elastic material.
According to this feature, when the coupling tool is inserted into the end of the pipe member, the diameter-enlarged portion of the coupling tool can be easily inserted into the pipe member due to its elastic characteristics.

The diameter expanding means is constituted by a press-fitting member.
According to this feature, the diameter-expanded portion can be expanded simply by press-fitting the press-fitting member into the connector.

The connector is non-rotatably engaged with the fixed member.
According to this feature, since the rotation of the coupling tool is restricted, the coupling tool inserted into the member to be fixed is easy to assemble because the circumferential position is always constant.

It is a disassembled perspective view of the connection structure used for the fall prevention apparatus in Example 1. FIG. (A) is a top view which shows a coupling tool, (b) is a side view which shows a coupling tool. It is an exploded view which shows a part of connection structure by a cross section. It is a figure which shows a mode that the to-be-fixed member and the coupling tool fitted. (A) is a perspective view which shows a mode that a pipe member is temporarily hold | maintained with a connection tool, (b) is the sectional drawing. (A) is a perspective view which shows the state which connected the protrusion support plate and the pipe member using the coupling tool, (b) is the sectional drawing.

  EMBODIMENT OF THE INVENTION The form for implementing the connection structure which concerns on this invention is demonstrated below based on an Example.

  The connection structure according to the first embodiment will be described with reference to FIGS. In the following description, the right side of FIG. 5B is the front side (front side) of the connection structure, and the lower side of FIG. 5B is the lower side (lower side) of the connection structure.

  As shown in FIG. 1, a part of the fall prevention device A used for a bookshelf provided with a pipe member 4 disposed on the front side of the shelf so that a book placed on the shelf does not fall. And an exploded view of a connecting structure that is a part of the fall prevention device A that allows the pipe member 4 at the upper position to move downward along the vertical groove S provided in the side plate B when the book is taken in and out. The protruding support plate 3 that is a fixed member of the present invention is attached so as to be movable up and down along the vertical groove S provided in the side plate B.

  The pipe member 4 disposed so as to be orthogonal to the protruding support plate 3 is assembled by inserting the connector 1 into the pipe member 4 from the front of the protruding support plate 3.

  The protruding support plate 3 is provided with an oval insertion port 30 corresponding to the hole of the present invention into which the connector 1 is inserted. The pipe member 4 includes the insertion port 43 into which the connector 1 is inserted, and the projection 15 of the present invention that is engaged with the convex portion 15 corresponding to the engagement portion of the connector 1 in the vicinity of the axial end 41. A locking hole 40 corresponding to the locking portion is formed.

  As shown in FIGS. 2A and 2B, the connector 1 is, for example, a resin-formed product, and comes into contact with the front side surface 32 (see FIG. 1) of the protruding support plate 3 to the rear of the connector 1. A flange portion 13 whose movement is restricted, a center portion 11, and a fitting portion 12 formed in a substantially oval shape in a radial section to be fitted into the oval insertion port 30 (see FIG. 1) of the protruding support plate 3. The body portion 10 is composed of a diameter-enlarged portion 14 that is reduced in diameter from the central portion 11 side toward the rear end portion in the axial direction, and the enlarged diameter portion 14 extends from the rear end portion in the axial direction to the central portion 11. A slit 16 that is opened over and a pair of convex portions 15 and 15 that are provided on the outer periphery and extend in the vertical direction in a side-view substantially truncated cone shape.

  Further, as shown in FIG. 3, the connector 1 has a through hole 10A that penetrates in the axial direction inside so that the diameter expanding means using a bolt can be inserted from the flange portion 13 as shown in FIG. When the head portion 21 of the bolt 2 is formed and received in the recess 17, the bottom surface 22 of the head portion of the bolt 2 contacts the recessed surface 17 </ b> A. Further, the connector 1 is formed with an inner diameter shorter than the outer diameter of the male screw portion 23 of the bolt 2 and the female screw portion 18 to be screwed with the male screw portion 23 of the bolt 2, and the tip of the bolt 2 is An inner diameter-reduced portion 19 that abuts is formed.

  Next, the specific attachment aspect of the connection structure 100 of this invention is demonstrated using FIGS. 4-6.

  As shown in FIGS. 4 and 5, when assembling the connection structure 100 of the present invention, first, the connecting tool 1 is inserted into the oval-shaped insertion port 30 (see FIG. 1) provided in the protruding support plate 3. Insert from the 14th side. The connector 1 inserted into the oval insertion port 30 is configured such that the outer peripheral surface 121 of the fitting portion 12 having the same shape and the entire inner peripheral surface 31 of the oval insertion port 30 of the projecting support plate 3 are in contact with each other. And the rotation of the connector 1 is restricted from the shape of the oval shape, which facilitates the assembly described later.

  With the connector 1 and the protruding support plate 3 fitted, the connector 1 is inserted into the insertion port 43 of the pipe member 4. At this time, the maximum diameter d1 of the convex portion 15 as the locking portion of the enlarged diameter portion 14 is larger than the inner diameter d2 of the pipe member 4 (see FIG. 3), but when inserted into the pipe member 4, the slit 16 Thus, the central portion 11 and the enlarged diameter portion 14 can be smoothly inserted from the insertion port 43 of the pipe member 4 by bending inward in the radial direction.

  When the convex portion 15 reaches the position of the locking hole 40 as the locked portion of the pipe member 4, the bending force applied to the convex portion 15 is released, and the convex portion 15 engages with the locking hole 40. To do.

  In this way, with the tip 44 of the pipe member 4 in contact with the rear surface 33 of the projecting support plate 3, the projection 15 is fitted and locked into the locking hole 40 corresponding to the locked hole of the present invention. Therefore, as shown in FIG. 5B, the pipe member 4 is always temporarily fixed to the connector 1 at an accurate position. In this temporarily fixed state, the protruding support plate 3 is positioned between the tip end portion 44 of the pipe member 4 and the side end surface 131 on the opposite side in the axial direction from the concave portion 17 of the flange portion 13 of the connector 1. The Rukoto.

  Thereafter, as shown in FIGS. 5A and 5B, the bolt 2 is removed from the flange portion 13 of the connector 1 while the pipe member 4 is temporarily held on the protruding support plate 3 via the connector 1. The male screw part 23 of the bolt 2 and the female screw part 18 of the connector 1 are screwed together.

  As shown in FIGS. 6A and 6B, the distal end of the male screw portion 23 that has passed through the female screw portion 18 comes into contact with the inner diameter-reduced portion 19, so that the enlarged diameter portion 14 and the central portion 11 Since the opening is made by the formed slit 16, the enlarged diameter portion 14 is enlarged in the radial direction. As a result, the protrusions 15 and 15 are engaged deeper than the state in which the protrusions 15 and 15 are temporarily fixed to the locking holes 40 and 40 of the pipe member 4 to complete the assembly. Note that deep engagement means that there is a large engagement allowance between the locking hole 40 and the convex portion 15 in the radial direction. As a result, the movement and rotation of the pipe member 4 in the axial direction is strongly restricted, and the convex portion 15 can be visually observed through the locking hole 40, so that the connector 1 is accurately aligned with the pipe member 4. Further, it can be confirmed that the protruding support plate 3 is sandwiched and aligned between the tip end portion 44 of the pipe member 4 and the side end face 131 of the connector 1.

  Further, as shown in FIG. 6B, the projecting surfaces 151 and 151 of the projecting portions 15 and 15 projecting into the locking holes 40 and 40 are substantially flush with the outer peripheral surface of the pipe member 4, or It is set to be located slightly inside.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, it has been described that the number of the locking holes 40 provided in the pipe member 4 and the number of the convex portions 15 provided in the coupler 1 are two, but three or more holes and convex portions are arranged equally. Or it may be one by one.

  Moreover, although it described that the connecting tool 1 and the volt | bolt 2 screw together and expand the diameter-expanding part 14, a pin member (press-fit member) is press-fit in the connecting tool 1, and the diameter-expanding part 14 is expanded at the front-end | tip. You may let them.

  Moreover, although the collar part 13 was described as circular shape, what is necessary is just a shape which does not come out from the hole of the protrusion support plate 3, for example, it is good also as triangular shape, square shape, etc.

  In addition, although the oval insertion port 30 and the fitting portion 12 are described as oval shapes, both may be non-rotatably engaged, and may be, for example, triangular or quadrangular.

1 connector 2 bolt (diameter expansion means)
3 Protruding support plate (fixed member)
4 Pipe member 10 Trunk part 11 Center part 12 Fitting part 13 Gutter part 14 Diameter expansion part 15 Convex part (locking part)
16 Slit 18 Female Thread Part 19 Internal Diameter Reduction Part 23 Male Thread Part 30 Oval Insertion Port 40 Locking Hole (Locked Part)
43 Insert 100 Connecting structure A Fall prevention device B Side plate d1 Maximum diameter d2 Inner diameter S Vertical groove

Claims (6)

The fixed member and the pipe are inserted into a hole portion of the fixed member and an end portion of the pipe member, and a connecting tool including a diameter-enlarged portion that can be expanded in the pipe member by a diameter-enlarging means A connecting structure for connecting members,
The pipe member includes a locked portion on an inner wall,
The coupler includes a locking portion that is locked to the locked portion and a diameter-enlarged portion, and a trunk portion that can be inserted into the hole portion, and a flange portion that is larger than the trunk portion. The connecting structure characterized by having.   The locking portion provided in the body portion of the connector is a convex portion, and the locked portion provided in the pipe member is a locking hole that fits into the convex portion. The connection structure according to claim 1.   The connection structure according to claim 2, wherein the convex portion is formed in a diameter-expanded portion of the connector.   The connecting structure according to any one of claims 1 to 3, wherein at least the diameter-enlarged portion of the connecting tool is formed of an elastic material.   The connection structure according to any one of claims 1 to 4, wherein the diameter expanding means is constituted by a press-fitting member.   The connection structure according to claim 1, wherein the connector is non-rotatably engaged with the fixed member.

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