JP2000213514A - Member coupling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a coupling structure as being hard to produce any insertional looseness and play in space between a coupled member and a joint member inserted into the insertion hole. SOLUTION: A clamp screw 4 is set up in place from the outside of a frame member 2 in the form of piercing through the wall part of a joint inserting hole 21 and an inserted part 31 of a joint member 3. On the other hand, A tip part of this clamp screw 4 projecting to a backside of the inserted part 31 is screwed with a nut member 5 to be set up in a state of being rotation preventive to this inserted part 31. In addition, this coupling structure is provided with a cam mechanism 6 which transmits a screwing thrust to be produced in the nut member 5 by a rotational operation of the clamp screw 4 to the inserted part 31 as converting it into the force of retraction into the joint inserting hole 21. The clamp screw 4 is rotatively operated and it is clamped into the nut member 5, thereby clamping it together with the frame member 2 corresponding to the inserted part 31, and on the basis of the retraction force being produced in the inserted part 31 by the cam mechanism 6, an opening peripheral edge part of the joint inserting hole 21 of the frame member 2 is forcibly pressed and locked to each stopper part 32 saliently formed at individual base end positions of each inserted part 31 integrally with this.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member connecting structure for connecting connected members such as sashes and angle members using joint members.

[0002]

2. Description of the Related Art For example, a sash for fixing and holding a glass plate for a window or a door is generally constructed by connecting four frame members at corners. These frame members are sometimes connected by direct fastening using bolts and nuts, but a butt connection structure using a built-in joint member is often adopted in order to improve the appearance of the connection portion. In the latter structure, the joint insertion hole formed on the frame member side has L
Each end of the U-shaped joint member is inserted, and a bolt is screwed into the joint member from outside the frame member to fasten the joint member.

[0003]

However, in the above-described conventional connection structure, the connection between the frame member and the joint member is performed by relying on the fastening force of the screw member in the thrust direction. There is a disadvantage that the joint member is likely to loosen or rattle in the direction. For example, the looseness of the joint member causes a gap between the end faces of the frame members to be connected, which not only deteriorates the appearance, but also, for example, the holding force of the glass plate in a frame member for holding a glass plate such as a sash. This may lead to problems such as loosening and chattering, and the glass plate falling off the frame.

An object of the present invention is to provide a sash, an angle member or the like as a member to be connected, which causes looseness or rattling in the insertion direction between the member to be connected and the joint member inserted into the insertion hole. It is to provide a difficult connecting structure.

[0005]

Means for Solving the Problems and Action / Effect To solve the above problems, a member connecting structure according to the present invention comprises a member to be connected having a joint insertion hole formed therein and a member to be connected to which two joint members are inserted. In order to butt-connect at the opening side of the hole, the joint member is inserted into the joint insertion hole on both sides in the longitudinal direction, and the joint member is inserted into the joint insertion hole. A fastening screw arranged to penetrate the wall of the joint insertion hole and the inserted portion from the outer surface side of the connecting member, and a tip of the fastening screw projecting through the inserted portion and projecting to the back surface side in the joint insertion hole in the joint insertion hole The screw member is screwed together, and a nut member arranged in a detented state with respect to the inserted portion, and a screwing force generated in the nut member due to the rotation operation of the fastening screw is jointly inserted into the inserted portion. And a cam mechanism for transmitting while converting into a relative pulling force into the hole, while rotating the fastening screw to tighten the nut member to fasten the inserted portion and the corresponding connected member. A stopper portion formed integrally with and protruding from an opening peripheral edge of a joint insertion hole of a connected member at a base end position of each inserted portion, based on a retraction force generated in the inserted portion by the cam mechanism, or It is characterized in that it is fixed by pressing against the periphery of the opening of the joint insertion hole of the connected member which is the mating partner.

According to the configuration of the present invention, by rotating the fastening screw and tightening the nut into the nut member, the cam mechanism generates the inserted portion at the inserted portion while fastening the inserted portion and the corresponding connected member. Based on the pull-in force, the peripheral edge of the opening of the joint insertion hole of the connected member is formed at the base end position of each inserted portion with a stopper portion integrally formed therewith, or of the connected member which is the mating partner side. The joint insertion hole is pressed and fixed to the periphery of the opening. Therefore, between the connected member and the joint member inserted into the joint insertion hole, loosening or rattling in the insertion direction hardly occurs. Thereby, a gap is less likely to be formed between the end faces of the connected members to be connected, and the appearance of the connected state is improved. Further, when the connected member is a frame member for holding a glass plate, such as a sash, the holding force of the glass plate is loosened, causing chattering, or causing a problem such as the glass plate falling off the frame. It becomes difficult.

[0007]

Embodiments of the present invention will be described below with reference to various embodiments shown in the drawings. FIG.
1 shows a sash unit as an example to which the present invention is applied. In this sash unit 100, each end of the frame member 2 having four sections holding each edge of the square glass G is positioned at each corner of the glass G by the member connecting mechanism 1 according to an embodiment of the present invention. It is configured as a butt connection.

FIGS. 2A and 2B are enlarged views showing the structure of the member connecting mechanism 1. FIG. 2A is a partially cutaway plan view, and FIG.
FIG. As shown in FIG. 2B, the frame member 2 is formed as a hollow member having a substantially rectangular cross section by extrusion of aluminum or an aluminum alloy. The butted end of each frame member 2 is approximately 45
It is cut obliquely at an angle of °, and the inner gap functions as a joint insertion hole 21 opened to the end face. In the state assembled in the sash unit 100 of FIG. 1, a holding groove 22 for holding the edge of the glass G is provided along the longitudinal direction slightly in the height direction of the side surface serving as the inner peripheral surface thereof. Is formed. The holding groove 22 is formed on the inner surface of the wall forming the outer surface of the frame member 2.
Side wall 2 located at the middle of the frame member 2 in the height direction
4, a guide rib 23 is formed.

The outline of the main part of the present invention and its operation and effect will be described below. The joint member 3 has two joint insertion holes 21 corresponding to both sides in the longitudinal direction in order to butt-connect the two frame members 2 and 2 as connected members at the opening surfaces of the joint insertion holes 21 and 21. , 21 to be inserted.
Further, as shown in FIG.
In a state where the inserted portion 31 is inserted into the frame member 2, the wall portion of the joint insertion hole 21 and the inserted portion 31 of the joint member 3 penetrate from the outer surface side of the frame member 2 (connected member).
A fastening screw 4 is arranged.

On the other hand, in the joint insertion hole 21,
Fastening screw 4 that penetrates inserted part 31 and protrudes to the back side
A nut member 5 arranged in a detented state with respect to the inserted portion 31 is screwed into the distal end of the nut. Further, a cam mechanism 6 is provided which transmits a screwing force generated in the nut member 5 by the rotation operation of the fastening screw 4 to the inserted portion 31 while converting the screwing force into the joint insertion hole 21. By rotating the fastening screw 4 and tightening the nut member 5, the cam mechanism 6 fastens the inserted portion 31 and the corresponding frame member 2 while the inserted portion 31 is fastened to the inserted member 31.
4 (a) and 4 (b), the opening edge of the joint insertion hole 2 of the frame member 2 (in this embodiment, the member end face cut at 45 °). ) Is pressed and fixed to a stopper 32 formed at the base end position of each inserted portion 31 and integrally formed therewith. Thereby, loosening and rattling in the insertion direction are less likely to occur between the frame member 2 and the joint member 3 inserted into the joint insertion hole 21 thereof.

Hereinafter, the structure of the connecting mechanism 1 will be described in more detail. As shown in FIG. 2A, the frame member 2 as the connected member has a joint insertion hole 21 opened at the longitudinal end face thereof, and the stopper portion 32 is provided with a base of the inserted portion 31 to be inserted therein. At the end side, it is protruded in a flange shape in the circumferential direction. Thereby, the joint insertion hole 2
The peripheral edge portion 1, that is, the rectangular annular end surface of the frame member 21 can be stably supported by the flange-shaped stopper portion 31. In this embodiment, at a position corresponding to the holding groove 22 (FIG. 2) of the frame member 2, the flange-shaped stopper portion 31 avoids interference with the glass G held by the holding groove 22. A notch 39 shown in FIG.

The flange-shaped stopper portion 32 is shared by the inserted portions 31, 31 protruding on both sides, and the both surfaces of the stopper portion 31 in the thickness direction are received as corresponding receiving surfaces 37, 37. The end surfaces of the frame members 2 inserted into the portion 31 are in contact with the receiving surfaces 37 respectively. By sharing the stopper portion 32 with the two inserted portions 31, 31, the shape of the joint member 3 can be simplified, and manufacturing becomes easy. In addition, by sandwiching the flange-shaped stopper portion 32 between the end surfaces of the frame members 2, the appearance of the butted portion can be improved. The joint member 3 is shown in FIG.
As shown in (a), the two inserted portions 31 have an L-shaped configuration formed in directions substantially orthogonal to each other, and at the intersection of their base end portions, the extension of each of the inserted portions 31, 31 is provided. The stopper portion 32 is formed so as to form an angle of approximately 45 ° with the exit direction. Needless to say, such a form of the joint member 3 is advantageous for connecting the two frame members 2 and 2 in a substantially orthogonal form.

Incidentally, as shown in FIG.
On the receiving surfaces 37, 37, there are formed positioning projections 38 which regulate the outer edge positions of the end faces of the frame members 2, 2 (FIG. 2 and the like) abutting on the receiving surfaces 37, 37. Thereby, at the time of fastening, the end faces of the frame members 2 are
In the form of being inserted into a shallow recess surrounded by the positioning projection 38, the positioning can be smoothly performed on the receiving surfaces 37, 37 of the stopper portion 32, and the play along the receiving surfaces 37, 37 can be reduced. As a result, a stable connection state can be obtained. Further, by hiding the butting edges of the frame members 2 and 2 with the positioning projections 38, the aesthetic appearance of the butting connection portions can be further improved.

In this embodiment, the joint member 3
Is configured as, for example, an aluminum die-cast part, and the inserted portion 31 has a main body portion 30 having a rectangular cross section as shown in FIG. Guide portions 36, 36 are formed on the side in such a manner as to project to both sides in the width direction. As shown in FIG. 2B, the inserted portion 31 is inserted into the joint insertion hole 21 while being guided by the guide ribs 23 and the guide surface 24 in the frame member 2 at the guide portions 36, 36. Has become. In addition, a gap 33 is formed at the base end of each main body 30, so that the weight of the stopper member 3 is reduced. Further, a relief groove 47 along the stopper 32 is provided on the base end surface of the main body 30 to improve the adhesion of the joint member 3 to the stopper 32.
Are formed.

Next, as shown in FIG. 4 (c), the cam mechanism 6 is formed integrally with the inserted part 31 on the back side of the inserted part 31 in the direction in which the fastening screw 4 protrudes. While the nut member 5 screwed into the screw 4 is brought into contact,
It has a cam inclined surface portion 34b that is inclined from the distal end side of the fastening screw 4 to the proximal end side in a direction opposite to the retraction direction of the inserted portion 31. By forming such a cam inclined surface portion 34b, a cam mechanism for pulling the inserted portion 31 into the joint insertion hole 21 and sliding can be easily formed.

Specifically, the inserted portion 31 (the main body 30)
A nut receiving recess 34 for receiving the nut member 5 is formed on the back side of the nut. The front inner wall surface of the nut receiving recess 34 in the insertion direction of the inserted portion 31 forms a cam inclined surface portion 34b. I have. By accommodating the nut member 5 in the nut accommodating recess 34, the dimensions of the assembly of the nut member 5 and the inserted portion 31 can be reduced, and
Since the cam inclined surface portion 34b is formed using the inner wall surface of the nut accommodating recess 34, the overall size is reduced. Thereby, even when the cross-sectional dimension of the joint insertion hole 21 is limited, the connecting mechanism of the present invention can be easily incorporated. In this embodiment, the opening of the nut accommodating concave portion 34 is closed by the adhesive tape 40, and for example, the nut member 5 accommodated in the state where the inserted portion 31 is removed from the joint insertion hole 21 or the like. Prevention of falling off is attempted.

Next, a screw insertion hole 35 for the fastening screw 4 is formed so as to penetrate the bottom of the nut receiving recess 34.
As shown in FIG. 3, the screw insertion hole 35 is
1 is formed in an elliptical shape (or a long hole shape) extending in the moving direction to allow the pull-in slide. Also,
For the same reason, the cross-sectional shape of at least the opening surface side of the nut accommodating recess 34 is formed in a long hole shape extending in the insertion direction of the inserted portion 31 into the joint insertion hole 21. On the other hand, as shown in FIG.
5, a tapered counterbore 35a for receiving the dish-shaped screw head 4a is formed at the inner edge of the opening.

As shown in FIGS. 4A and 4B, the outer peripheral surface of the nut member 5 is formed with at least one pair of parallel surfaces 5a, 5a formed substantially in parallel with each other. In the embodiment, a hexagonal nut member 5 having three such parallel surfaces is used.) The nut receiving recess 34 has inner walls 34a in the width direction formed substantially parallel to each other. On the other hand, nut member 5
Are accommodated in the nut accommodating recess 34 such that the parallel surfaces 5a, 5a coincide with the width-direction inner wall surfaces 34a, 34a.
Then, as the inserted portion 31 is pulled into the joint insertion hole 21, the width direction inner wall surface 3 is formed on the parallel surfaces 5a, 5a.
The nut member 5 relatively moves in the nut accommodating recess 34 in the insertion direction while being prevented from rotating and guided by 4a and 34a. Thereby, when the nut member 5 moves in the nut accommodating recess 34, rattling in the width direction thereof is extremely unlikely to occur, and the cam of the inserted portion 31 with respect to the nut member 5 slides smoothly. .

The joint member 3 is not limited to an L-shaped member as shown in FIG. 2 for connecting the two frame members 2 and 2 in an orthogonal shape, but may be a linear member as shown in FIG. It can also be configured. In this case, the to-be-inserted portions 31, 31 are formed to extend in opposite directions to both sides of the flange-shaped stopper portion 32, and each of the joint insertion holes 21 of the frame members 2, 2 having an end surface shape substantially orthogonal to the longitudinal direction. , 21, the two frame members 2 can be linearly butted and connected in the longitudinal direction.

Further, as shown in FIG. 6, the joint insertion hole 21 can be formed so as to open on the side face, not the end face of the frame member 2. In this case, the inserted portion 31 of the joint member 3 is
It is arranged close to any one of three walls (one of which is an end face) (in this embodiment, 27) adjacent to the wall 27 where the joint insertion hole 21 is open. Then, the fastening screw 4 penetrates the wall portion 27 and the inserted portion 31
Will be inserted. Such a configuration, for example,
It can also be suitably used for connecting components such as steel furniture, chairs and desks.

On the other hand, as shown in FIG. 7, the stopper 31 is omitted from the joint member 3 and the peripheral edge of the joint insertion hole 21 of the frame member 2 is brought into contact with the joint insertion hole 21 of the frame member 2 which is the mating partner. May be directly pressed against the peripheral edge of the opening to fix.

[Brief description of the drawings]

FIG. 1 is a plan view of a sash unit as an example to which the present invention is applied.

2 is a partially cutaway plan view and an AA cross-sectional view showing a part of a member connecting mechanism of the sash unit of FIG. 1 in an enlarged manner.

FIG. 3 is a plan view, a back view, and a side view of the joint member.

FIG. 4 is an operation explanatory view of the member connecting mechanism of FIG. 2;

FIG. 5 is a sectional view showing a first modification of the member connection mechanism of FIG. 1;

FIG. 6 is a sectional view showing a second modified example.

FIG. 7 is a cross-sectional view showing a third modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Member connection structure 2 Frame member (connected member) 3 Joint member 4 Fastening screw 5 Nut member 21 Joint insertion hole 31 Inserted part 32 Stopper part 33 Air gap 34 Nut accommodation hole 34a Cam inclined surface 38 Positioning convex part

Claims (9)

[Claims] 1. A joint member having a joint insertion hole formed therein, and two connected members butt-connected at an opening surface side of the joint insertion hole. And a joint member to be inserted into the joint insertion hole, and in a state where the inserted portion is inserted into the joint insertion hole, a wall portion of the joint insertion hole and the inserted portion from an outer surface side of the connected member. A fastening screw arranged so as to penetrate, and, within the joint insertion hole, a tip end portion of the fastening screw that penetrates the inserted portion and protrudes to the back surface side thereof is screwed together with the inserted portion. A nut member arranged in a detent state, and a screwing force generated in the nut member by a rotation operation of the fastening screw, relative to the inserted portion, into the joint insertion hole. A cam mechanism that transmits the cam mechanism while converting it into an insertion force. By rotating the fastening screw and tightening the nut into the nut member, the cam mechanism is tightened with the inserted member and the corresponding connected member. A stopper portion formed integrally with the opening peripheral edge of the joint insertion hole of the connected member at a base end position of each of the inserted portions based on the pulling force generated in the inserted portion. Alternatively, the member connecting structure is characterized in that the member is pressed against and fixed to a peripheral edge of an opening of a joint insertion hole of a member to be connected which is a mating partner. 2. The cam mechanism is formed integrally with the inserted portion on the back side of the inserted portion in a direction in which the fastening screw projects, and abuts the nut member screwed into the fastening screw. 2. The member connecting structure according to claim 1, further comprising a cam inclined surface portion inclined in a direction opposite to a retraction direction of the inserted portion from a distal end side to a proximal end side of the fastening screw. 3. A nut accommodating recess for accommodating the nut member is formed on a back surface side of the inserted portion, and a front inner wall portion of the nut accommodating recess in the insertion direction of the inserted portion is the cam. 3. The member connecting structure according to claim 2, wherein the inclined surface portion is formed. 4. An outer peripheral surface of the nut member has at least one pair of parallel surfaces formed substantially in parallel with each other, and the nut accommodating concave portion has a width-direction inner wall surface formed substantially in parallel with each other. The nut member is accommodated in the nut accommodating recess in a direction in which the parallel surface coincides with the inner wall surface in the width direction, and with the insertion of the inserted portion into the joint insertion hole, 4. The member connection structure according to claim 3, wherein the nut member relatively moves in the nut receiving recess in the insertion direction while being stopped and guided by the inner wall surface in the width direction. 5. The member connecting structure according to claim 4, wherein at least the cross-sectional shape of the nut accommodating concave portion on the opening surface side is formed in a long hole shape extending in the insertion direction. 6. The connected member is a frame member having the joint insertion hole opened at a longitudinal end face thereof, and the stopper portion is provided on a base end side of the inserted portion so as to protrude in a circumferential direction in a flange shape. The member connecting structure according to claim 5, wherein 7. The insertion portion protrudes on both sides of the flange-shaped stopper portion so as to share the same stopper portion, and each of both surfaces of the stopper portion is inserted into a corresponding insertion portion as a receiving surface. 7. The member connecting structure according to claim 6, wherein end surfaces of the connected members are in contact with the receiving surfaces. 8. The member connecting structure according to claim 7, wherein the receiving surface is formed with a positioning convex portion along an outer peripheral edge thereof for regulating an outer edge position of an end face of the connected member that comes into contact with the receiving surface. 9. The joint member according to claim 1, wherein the two inserted portions are formed in directions substantially orthogonal to each other.
9. The flange-shaped stopper portion is formed at a position intersecting at the base end portion thereof at an angle of approximately 45 ° with respect to the extending direction of each inserted portion. 3. The member connection structure according to 1.