JP7297252B2 - Connection structure and connection method of frame members, and connection metal fittings therefor - Google Patents

Description

TECHNICAL FIELD The present invention relates to a frame member connection structure and connection method for connecting frame members (for example, a vertical frame and a horizontal frame) in an orthogonal state, and a connection fitting therefor.

BACKGROUND ART In the construction of general houses and condominiums, there is a frequent need to connect vertical frames and horizontal frames in an orthogonal state in order to construct opening frames for installing shoji screens, doors, and the like. Conventionally, the vertical frame and the horizontal frame were connected by screwing a nail or a screw from the side of the vertical frame into the end of the horizontal frame that is in contact with the inner surface of the vertical frame. However, there were problems such as cracking in the end portion of the horizontal frame, and that if a nail or screw was inserted obliquely, the nail or screw would protrude from the surface of the horizontal frame. Therefore, in recent years, several structures have been proposed for connecting frame members in a labor-saving manner without causing these problems.

For example, in Patent Document 1 below, in a frame joint structure obtained by bringing the end surface of one frame member into contact with the inner surface of the other frame member and joining these two frame members in an orthogonal state, one frame member is a first hole extending from the end face in the longitudinal direction of the frame member; and a substantially cylindrical second hole that crosses the first hole substantially perpendicularly and opens on the outer surface of the frame member. The other frame member has a through hole penetrating from the outer surface to the inner surface thereof, and a round nut receiver is rotatably inserted into the second hole of the one frame member. The round nut receiver comprises a cylindrical member having a bolt insertion hole penetrating the side surface thereof, and a plate-shaped nut member having a female thread substantially concentric with the bolt insertion hole of the cylindrical member. With the nut receiver inserted into the second hole of one of the frame members, the bolt-like coupler is inserted with the first hole of the one frame member aligned with the through hole of the other frame member, A frame coupling structure has also been proposed in which the frame members are coupled together by screwing the male thread of the bolt-like coupling into the female thread of the plate-like nut member of the round nut receiver.

Further, in Patent Document 2 below, a screw receiving tool A, two plate members B and C to be joined at right angles, and a long screw D are provided. A head portion with a large diameter and a different diameter is formed integrally with the upper end of the shaft portion, and the shaft portion is provided with a screw hole that penetrates in a direction orthogonal to the shaft center and is screwed with the screw D. The surface of one of the plate members B is provided with a shallow groove extending in a parallel direction or a perpendicular direction along the side end surface of the plate member B, and the plate member B is provided at a desired location of the groove. A receiving tool insertion hole extending in the thickness direction of the plate member B is provided, and a screw receiving hole communicating perpendicularly from the side end surface of the plate member B to the receiving tool insertion hole is provided. The width of the groove is larger than the diameter of the small-diameter portion of the different-diameter head of the screw-receiving tool A and smaller than the diameter of the large-diameter portion. so that when the shaft portion of the screw receiving tool A is inserted into the receiving tool insertion hole and the different diameter head is fitted in the groove, the axis of the screw hole and the axis of the screw receiving hole are aligned. A plate connecting device has been proposed in which the positions of screw holes are set in advance.

Japanese Patent Application Laid-Open No. 2008-88648 JP 2009-121619 A

The connection structures according to Patent Documents 1 and 2 are basically the same, and representatively described in the example of Patent Document 1, after inserting the round nut receiver into the second hole of one of the frame members, With the first hole of one frame member and the through hole of the other frame member aligned, the bolt-like coupler is inserted through the through hole of the other frame member, and the male screw of the bolt-like coupler is threaded into the round shape. The frame members are connected by screwing them into the female threads of the plate-shaped nut member of the nut receiver. be able to connect.

However, even in such a structure, it is necessary to rotate the bolt-like coupling with a screwdriver or the like in order to screw the bolt-like coupling into the female thread of the plate-like nut member. Therefore, a frame connection structure capable of further saving labor has been desired.

Therefore, the main object of the present invention is to provide a frame member connection structure and connection method for connecting the vertical frame and the horizontal frame in an orthogonal state, and to further reduce the labor for fastening both members. It is to plan.

In order to solve the above-mentioned problem, the present invention according to claim 1 is a frame member connection structure for connecting one side frame member and the other side frame member joined in a state orthogonal to this with metal fittings. hand,
The one-side frame member communicates with a pilot hole for a connecting shaft drilled along the longitudinal direction of the member from the butt end surface, and an intermediate position of the pilot hole for the connecting shaft in a direction orthogonal to the pilot hole for the connecting shaft. and a fitting installation hole with one end facing the outside, and the other side frame member has a connecting shaft insertion hole penetrating in the thickness direction from the outer surface,
A substantially inverted U-shaped engaging groove that opens toward the tip side is formed in a state in which the connecting shaft insertion hole of the other side frame member and the connecting shaft pilot hole of the one side frame member are aligned in a straight line. A connection receiver is installed in the fitting installation hole, has a head portion and a shaft portion, has an engagement side shaft portion having a predetermined diameter on the shaft portion, and is adjacent to the head side of the engagement side shaft portion. Then, a connecting shaft having a small diameter portion with a small shaft diameter is inserted from the connecting shaft insertion hole of the other side frame member, and the shaft portion is inserted into the connecting shaft prepared hole of the one side frame member. and a connection structure for frame members, wherein the one-side frame member and the other-side frame member are connected by engaging the engagement groove of the connection receiver with the small-diameter portion of the connection shaft. provided.

In the invention according to claim 1, the connecting shaft pilot hole is previously drilled in the one-side frame member from the butt end along the longitudinal direction of the member, and the connecting shaft is provided at an intermediate position between the connecting shaft pilot hole and the connecting shaft pilot hole. A fitting installation hole is formed which communicates with the pilot hole for the shaft in a direction perpendicular to it, and one end of which faces the outside is formed. Keep Then, in a state in which the connecting shaft insertion hole of the other side frame member and the connecting shaft prepared hole of the one side frame member are aligned on a straight line, the substantially inverted U-shaped engagement opening toward the tip side is engaged. A connection receiver having a groove is installed in the metal fitting installation hole, and is composed of a head portion and a shaft portion. A connecting shaft having a small diameter portion with a small diameter is inserted from the connecting shaft insertion hole of the other side frame member, and the engaging groove of the connection receiver is engaged with the small diameter portion of the connecting shaft. By doing so, the one-side frame member and the other-side frame member are connected.

In the present invention, the one side frame member and the other side frame member are connected by engaging the engagement groove of the connection receiver with the small diameter portion of the connection shaft inserted through the connection shaft insertion hole of the other side frame member. It is what is done. In other words, instead of screwing the threaded portion of the screw into the screw receiver by turning it with a screwdriver as in the prior art, the connection receiver is used as described later in the connection method of claim 3. It is fastened by engaging the engagement groove of the connection receiver with the small diameter portion provided on the connection shaft by driving. Therefore, the work for fastening both members is labor-saving more than before.

As the present invention according to claim 2, a frame member connection structure for connecting one side frame member and the other side frame member joined in a state orthogonal thereto with metal fittings,
The one-side frame member communicates with a pilot hole for a connecting shaft drilled along the longitudinal direction of the member from the butt end surface, and an intermediate position of the pilot hole for the connecting shaft in a direction orthogonal to the pilot hole for the connecting shaft. and a fitting installation hole with one end facing the outside, the other frame member has a connecting shaft installation hole along the thickness direction from the inner surface,
A substantially inverted U-shaped engaging groove that opens toward the tip side is formed in a state in which the connecting shaft insertion hole of the other side frame member and the connecting shaft pilot hole of the one side frame member are aligned in a straight line. A connection receiver is installed in the fitting installation hole, has a head portion and a shaft portion, has an engagement side shaft portion having a predetermined diameter on the shaft portion, and is adjacent to the head side of the engagement side shaft portion. A connecting shaft having a small diameter portion with a smaller shaft diameter and a threaded portion on the opposite side of the head portion is screwed into the connecting shaft installation hole of the other side frame member. The one-side frame member and the other-side frame member are engaged with the small-diameter portion of the connecting shaft in a state in which the shaft portion is inserted into the pilot hole for the connecting shaft. There is provided a connection structure for frame members, characterized in that the and are connected to each other.

The invention according to claim 2 shows a modification of the connecting shaft. The changes are that the other side frame member has a connecting shaft installation hole along the thickness direction from the inner surface, and that the connecting shaft has a threaded portion on the opposite side of the head. .

Then, the threaded portion of the connecting shaft is screwed into the connecting shaft installation hole of the other side frame member, and in a state in which the shaft portion is inserted into the pilot hole for the connecting shaft, the small diameter portion of the connecting shaft is fitted with the The one side frame member and the other side frame member are connected by engaging the engagement groove of the connection receiving tool.

As the present invention according to claim 3, there is provided a method for connecting a frame material connection structure according to any one of claims 1 and 2,
The other side frame member and the one side frame member are perpendicular to each other, and the connection shaft insertion hole or the connection shaft installation hole of the other side frame member and the connection shaft prepared hole of the one side frame member are aligned in a straight line. a first step of installing the connecting shaft in a state in which they are aligned and at least the shaft portion is inserted into the pilot hole for the connecting shaft of the one-side frame member;
A connection receiver having a generally inverted U-shaped engagement groove that opens toward the tip end is driven into the metal fitting installation hole of the one-side frame member, and the connection receiver is engaged with the small diameter portion of the connection shaft. and a second step of connecting the one-side frame member and the other-side frame member by engaging matching grooves.

In the invention according to claim 3, first, the other side frame member and the one side frame member are perpendicular to each other, and the connecting shaft insertion hole or the connecting shaft installation hole of the other side frame member and the one side The connecting shaft pilot hole of the frame member is aligned with the connecting shaft pilot hole, and the connecting shaft is installed with at least the shaft portion inserted into the connecting shaft pilot hole of the one-side frame member (first step).

Next, a small diameter portion provided at the intermediate portion of the connecting shaft is driven into the metal fitting installation hole of the frame member on one side by driving a connection receiving tool having an engaging groove in a substantially inverted U shape that opens toward the tip side. The one side frame member and the other side frame member are firmly connected to each other by engaging the engagement groove of the connection receiving tool with each other (second procedure).

In the case of this method, in the second step, the one-side frame member and the other-side frame member can be connected simply by hammering the connection receiver with a hammer or the like. It's becoming

According to a fourth aspect of the present invention, the substantially inverted U-shaped engagement groove of the connection receiver has an inclined surface portion at the end of the engagement groove, and the small diameter portion of the connection shaft is the inclined portion. 4. A method for connecting frame members according to claim 3, wherein said connecting shaft is retracted in the inserting direction by driving said connecting support by corresponding to the surface portion.

The invention according to claim 4 shows a preferred embodiment of the connecting shaft and the connecting fitting. That is, the generally inverted U-shaped engagement groove of the connection receiver has an inclined surface portion at the end of the engagement groove. Since the small-diameter portion of the connecting shaft corresponds to the inclined surface portion, the small-diameter portion of the connecting shaft slides along the inclined surface portion when the connection support is driven. do. This movement causes the connecting shaft to be retracted in the insertion direction. Therefore, the one-side frame member and the other-side frame member are firmly connected without loosening.

According to a fifth aspect of the present invention, an engagement side shaft portion having a predetermined diameter is provided in an intermediate portion of the shaft portion, and is adjacent to the head side of the engagement side shaft portion. 2. The frame member according to claim 1, wherein a connecting fitting having a small-diameter portion with a small shaft diameter and a connecting receiving tool having a generally inverted U-shaped engaging groove opening toward the tip side are used as a set. A connection fitting for the connection structure is provided.

According to a sixth aspect of the present invention, a head portion and a shaft portion are provided, and the shaft portion has an engagement side shaft portion having a predetermined diameter, and the shaft diameter is adjacent to the head portion side of the engagement side shaft portion. and a connecting shaft having a threaded portion on the opposite side of the head, and a connecting receiver having a substantially inverted U-shaped engaging groove opening toward the tip A pair of connecting fittings for connecting structure of frame members according to claim 2 is provided.

As described in detail above, according to the present invention, there is provided a connection structure and connection method of frame members for connecting a vertical frame and a horizontal frame in a state orthogonal to each other, which further saves labor for fastening both members. It is possible to achieve

Fig. 2 is a perspective view of main parts showing a state in which the horizontal frame 2 and the vertical frame 3 are connected; It is an exploded perspective view thereof. It is an enlarged vertical cross-sectional view of a main part thereof. FIG. 3 is a perspective view of a connection receiver 4; 1(A) is a front view, (B) is a side view, and (C) is a plan view showing a connection receptacle 4. FIG. 4 is a side view of the connecting shaft 5; FIG. FIG. 2(A) is a longitudinal sectional view and (B) is a transverse sectional view showing the fastening state between the connecting shaft 5 and the connecting receiver 4. FIG. 5 is a diagram for explaining the retraction of the connecting shaft 5; FIG. This is the procedure for connecting the horizontal frame 2 and the vertical frame 3 (No. 1). This is the procedure for connecting the horizontal frame 2 and the vertical frame 3 (Part 2). This is the procedure for connecting the horizontal frame 2 and the vertical frame 3 (part 3). 5 is a side view showing a modification of the connecting shaft 5; FIG. FIG. 11 is a perspective view showing a modification (No. 1) of the connecting shaft 5 in the first embodiment; FIG. 8A is a side view, and FIG. 8B is a right side view showing a modification (part 2) of the connecting shaft 5 in the first embodiment. FIG. 5 is a cross-sectional view showing a connection procedure according to a modified example (part 2) of the connecting shaft 5; (A) is a side view and (B) is a left side view showing a connecting shaft 6 according to a second embodiment. This is the procedure for connecting the horizontal frame 2 and the vertical frame 3 (No. 1). This is the procedure for connecting the horizontal frame 2 and the vertical frame 3 (part 2). This is the procedure for connecting the horizontal frame 2 and the vertical frame 3 (part 3). This is the procedure for connecting the horizontal frame 2 and the vertical frame 3 (No. 4).

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Example 1]
The connecting structure 1 of the frame members according to the present invention comprises one side frame member of the vertical frame 3 and the horizontal frame 2, and the other side frame member of the vertical frame 3 and the horizontal frame 2 connected perpendicularly thereto. are connected by connecting fittings 4 and 5. Specifically, as shown in FIGS. 1 to 3, one side frame member, in the illustrated example, the horizontal frame 2, has a connection shaft prepared hole 2a drilled along the longitudinal direction of the member from the butt end surface. It has a fitting installation hole 2b that communicates with the intermediate position of the connection shaft pilot hole 2a in a perpendicular state and that one end faces the outside. One of the other side frame members, the vertical frame 3 in the illustrated example, has a connecting shaft insertion hole 3a penetrating from the outer surface in the thickness direction.

Then, as shown in FIG. 3, the connecting shaft insertion hole 3a of the vertical frame 3 and the connecting shaft pilot hole 2a of the horizontal frame 2 are aligned in a straight line, and are opened toward the tip side. A connection receiver 4 having an engagement groove 4a in a substantially inverted U shape is inserted into the fitting installation hole 2b, and has a head portion 5a and a shaft portion 5b. A connecting shaft 5 having a portion 5e and a small-diameter portion 5c adjacent to the head portion 5a side of the engagement-side shaft portion 5e is inserted from the connecting shaft insertion hole 3a of the vertical frame 3. By engaging the engagement groove 4a of the connection receiver 4 with the small-diameter portion 5c of the connection shaft 5 in a state in which the shaft portion 5b is inserted into the connection shaft pilot hole 2a of the horizontal frame 2, The horizontal frame 2 and the vertical frame 3 are connected.

More specific details will be given below.

As shown in FIG. 1, the connection structure of the frame member according to the present invention consists of one side frame member of the vertical frame 3 and the horizontal frame 2, and the vertical frame 3 and the horizontal frame 2 which are connected perpendicularly thereto. are connected to the other side frame member by means of connecting metal fittings 4 and 5. In the illustrated example, one side frame member is a horizontal frame 2, the other side frame member is a vertical frame 3, and both frame members 2 are in a state in which the butt end surface of the horizontal frame 2 is in contact with the inner side surface of the upper end of the vertical frame 3. , 3 in an orthogonal manner. As shown in FIG. 13, the vertical frame 3 is used as the frame material on one side, the horizontal frame 2 is used as the frame material on the other side, and the butt end surface of the vertical frame 3 is in contact with the inner side surface of the end portion of the horizontal frame 2. In the case where both frame members 2 and 3 are connected in an orthogonal state, it is possible to carry out in exactly the same way.

As shown in FIG. 3, the lateral frame 2 is previously provided with a connection shaft pilot hole 2a along the longitudinal direction of the member from the butt end thereof. The number of connecting shaft pilot holes 2a is provided at intervals in the horizontal direction corresponding to the number of connecting shafts. Normally, the number of rows is one, but if the horizontal frame is thick, it is possible to arrange it in two rows. The diameter of the connecting shaft pilot hole 2a is such that the connecting shaft 5 can be pushed in relatively easily, that is, the diameter is approximately the same as the maximum diameter φ1 of the connecting shaft 5, or slightly smaller than this. It is desirable to form with a diameter.

Further, it communicates with an intermediate position of the connecting shaft prepared hole 2a, more specifically, a position near the tip side of the connecting shaft 5 in a direction orthogonal to the connecting shaft prepared hole 2a, and one end extends to the outside. A metal fitting installation hole 2b facing is formed. In the illustrated example, the metal fitting installation hole 2b is circular in plan view, but may be square, hexagonal, or the like.

On the other hand, in the vertical frame 3, a connecting shaft insertion hole 3a is formed in advance at a position where the butt end surface of the horizontal frame 2 is to be joined. In the illustrated example, in order to insert and hide the head portion 5a of the connecting shaft 5, the inlet portion of the connecting shaft inserting hole 3a is a head inserting hole 3b formed with a relatively large diameter. This connecting shaft insertion hole 3a is formed corresponding to the connecting shaft prepared hole 2a of the horizontal frame 2 in a 1:1 relationship. The connecting shaft insertion hole 3a has the same diameter as the connecting shaft prepared hole 2a.

A connection receiver 4 is fitted and installed in the metal fitting installation hole 2b of the horizontal frame 2. As shown in FIG. As shown in detail in FIGS. 4 and 5, the connection receiver 4 is a columnar member having a generally inverted U-shaped engaging groove 4a opening toward the distal end on the lower side. . The outer diameter D1 of the connection receiver 4 is the same as the diameter of the metal fitting installation hole 2b or slightly larger by about 0.1 to 0.5 mm, so that it does not easily come off due to friction when fitted. It is desirable to Also, as shown in FIG. 5B, it is desirable to make the diameter slightly smaller on the lower side than the midpoint in the height direction so that it can be easily inserted. Regarding the front shape of the engaging groove 4a, even if it is U-shaped downward (the ceiling surface is flat rather than arcuate), or even if both side surfaces of the engaging groove 4a are not flat, the entire engaging groove 4a is open downward. If it is a shape that does, it shall be included in the concept of "substantially inverted U shape". It is desirable that the material of the connection support 4 is a relatively soft metal material such as resin or aluminum alloy. When using resin, it is desirable to select a material that is highly tough and resistant to cracking.

The width S of the engaging groove 4a is approximately the same as or slightly narrower than the narrowest portion of the small diameter portion 5c of the connecting shaft 5. is fixed by the connection receiving tool 4 . Further, as shown in FIGS. 4 and 5, it is desirable that the engaging groove 4a has inclined surface portions 4b, 4b in a chamfered shape at the inlet side end and the outlet side end, respectively. This inclined surface portion 4b is for drawing the connecting shaft 5 in the insertion direction, as will be described later.

On the other hand, as shown in FIG. 6, the connecting shaft 5 has a head portion 5a and a shaft portion 5b. Adjacent to the head portion 5a side of the engaging-side shaft portion 5e is a small-diameter portion 5c having a diameter smaller than the shaft diameter φ1. The smallest diameter φ2 of the small-diameter portion 5c is approximately the same as or slightly larger than the width S of the engagement groove 4a of the connection support 4, and the connection support 4 is engaged with the small-diameter portion 5c. The grooves 4a are engaged to fix the two together.

In the structure of the present invention, when the small diameter portion 5c of the connecting shaft 5 is fastened to the engaging groove 4a of the connecting receiver 4, the connecting shaft 5 is first inserted through the connecting shaft insertion hole 3a, and the shaft portion 5b The engagement groove of the connection receiver 4 is engaged with the small-diameter portion 5c of the connection shaft 5 by driving the connection receiver 4 into the fitting installation hole 2b while being inserted into the connecting shaft prepared hole 2a of the horizontal frame 2. Fastening is performed only by mating, and since subsequent screw driving work can be eliminated, further labor saving can be achieved.

When the connection receiver 4 is driven into the fitting installation hole 2b, the engagement groove 4a of the connection receiver 4 has an inclined surface portion 4b at the end of the engagement groove 4a. 5 has an inclined stepped portion 5d at the end on the engagement side shaft portion 5e side of the small diameter portion 5c of 5, and this inclined stepped portion 5d corresponds to the inclined surface portion 4b of the connection receiver 4. Thus, as shown in FIG. 7, the connecting shaft 5 is retracted in the inserting direction by driving the connecting support 4. As shown in FIG. This point will be described in detail below with reference to FIG.

As shown in FIG. 8(A), the engaging groove 4a of the connection receiver 4 has inclined surface portions 4b, 4b in a chamfered shape at the inlet side end and the outlet side end, respectively. On the other hand, the tip side end of the small diameter portion 5c of the connecting shaft 5 forms an inclined stepped portion 5d. The inclined stepped portion 5d participates in the retraction of the connecting shaft 5. As shown in FIG.

As shown in FIG. 8(A), the inclined surface portion 4b of the engaging groove 4a of the connecting support 4 corresponds to the inclined stepped portion 5d of the small diameter portion 5c of the connecting shaft 5 (overlapping). ), when the connection receiver 4 is driven and forcibly fitted into the fitting installation hole 2b, the inclined surface portion 4b of the connection receiver 4 and the inclined stepped portion 5d of the connection shaft move to the side to avoid overlapping. try to. Since the connection receiver 4 is fitted into the fitting installation hole 2b, the position of the connection receiver 4 is immovable, so that the connection shaft 5 tries to move. The movement of the connecting shaft 5 is on the side where the inclined surface portion 4b of the connecting support 4 and the inclined stepped portion 5d of the connecting shaft 5 avoid overlapping, that is, in the direction of the insertion side of the connecting shaft 5, as shown in FIG. 8(B). As shown, the connection shaft 5 is retracted in the insertion direction by fitting the connection receiver 4 .

[How to connect frame materials]
Next, a method (procedure) for connecting the frame members will be described with reference to FIGS. 9 to 11. FIG.

(First step)
First, as shown in FIG. 9, the vertical frame 3 and the horizontal frame 2 are perpendicular to each other, and the connecting shaft insertion hole 3a of the vertical frame 3 and the connecting shaft pilot hole 2a of the horizontal frame 2 are aligned in a straight line. The connecting shaft 5 is inserted through the connecting shaft insertion hole 3 a of the vertical frame 3 with the vertical frame 3 aligned upward. The connecting shaft 5 is firmly pushed in so that its entire length is inserted into the connecting shaft insertion hole 3a and the connecting shaft prepared hole 2a. FIG. 10 shows the state in which the insertion of the connecting shaft 5 is completed.

(Second procedure)
Next, as shown in FIG. 10, a connection receiver 4 having a substantially inverted U-shaped engagement groove 4a opening toward the tip side is hammered into the metal fitting installation hole 2b of the horizontal frame 2 with a hammer or the like. Then, the small diameter portion 5c of the connecting shaft 5 is fitted into the engaging groove 4a of the connecting receiving member 4 and fixed. At this time, the inclined stepped portion 5d of the small diameter portion 5c of the connecting shaft 5 corresponds to (overlaps with) the inclined surface portion 4b of the engaging groove 4a of the connecting support 4, so that the connecting shaft 5 is pulled in the direction of the insertion side, an axial force (tensile force) is applied to the connecting shaft 5, so that the horizontal frame 2 and the vertical frame 3 are firmly connected. FIG. 11 is a perspective view showing a state in which connection is completed.

[Other form examples]
(1) In the above embodiment, the narrow diameter portion 5c of the connecting shaft 5 is formed with an inclined stepped portion 5d at the distal end. A vertical stepped portion 5f may be used instead of the sloped stepped portion of the leading end portion involved. Even with such a vertical stepped portion 5f, when trying to move so as to avoid overlapping of the inclined surface portion 4b of the connection support 4 and the vertical stepped portion 5f of the connection shaft, the connection support 4 is inserted into the fitting installation hole 2b and is stationary, the connecting shaft 5 moves in the insertion side direction (pull-in direction).
(2) Regarding the connecting shaft 5, for example, in order to fix it to the vertical frame 3, as shown in FIG. good. An engaging groove 5h (cross groove or linear groove) for engaging the tip of a screwdriver is formed on the outer surface of the head 5a.

Then, as shown in FIG. 15, when inserting the connecting shaft 5 from the connecting shaft insertion hole 3a of the vertical frame 3, the connecting shaft 5 is inserted while turning like a screw, and the connecting shaft 5 is inserted into the vertical frame. Firmly fix against 3. After that, as described above, the connection receiver 4 having the substantially inverted U-shaped engagement groove 4a opening toward the tip side is hammered into the metal fitting installation hole 2b of the horizontal frame 2 with a hammer or the like. , the engagement groove 4a of the connection receiving member 4 is fitted into the stepped portion 5c of the connection shaft 5 and fixed.

[Second form example]
Next, a second embodiment of the present invention will be described in detail with reference to FIGS. 16 to 20, focusing on differences from the first embodiment.

As shown in FIG. 16, the connecting shaft 6 according to the second embodiment has a head portion 6a and a shaft portion 6b. It has a part 6e. Adjacent to the head portion 6a side of the engaging-side shaft portion 6e is a small-diameter portion 6c having a diameter smaller than the shaft diameter φ1. The smallest diameter φ2 of the small-diameter portion 6c is approximately the same as or slightly larger than the width S of the engagement groove 4a of the connection support 4, and the connection support 4 is engaged with the small-diameter portion 6c. The grooves 4a are engaged to fix the two together. The head portion 6 a and the shaft portion 6 b are functionally the same as the connecting shaft 5 . The difference is that the connecting shaft 6 has a screw portion 6f on the opposite side of the head portion 6a. An engaging groove 6g (cross groove or linear groove) for engaging the tip of a screwdriver is formed on the tip surface of the shaft portion 6b.

On the other hand, in the vertical frame 3, as shown in FIG. 17, a connecting shaft installation hole 3a is formed along the thickness direction from the inner surface. A head fitting hole 3b having a relatively large diameter is formed in the inlet portion of the connecting shaft installation hole 3a so that the head 5a of the connecting shaft 5 can be fitted thereinto. The connection shaft installation hole 3a may pass through the vertical frame 3. As shown in FIG.

[How to connect frame materials]
(First step)
In the second embodiment, first, the connecting shaft 6 is installed with respect to the vertical frame 3 . As shown in FIG. 17, the threaded portion 6f of the connecting shaft 6 is inserted into the connecting shaft installation hole 3a of the vertical frame 3 while being screwed in using a screwdriver, and the connecting shaft 6 is fixedly installed on the vertical frame 3. . FIG. 18 is a diagram showing a state in which the connecting shaft 6 is installed on the vertical frame 3. As shown in FIG.

Next, as shown in FIG. 19, the horizontal frame 2 is brought in, the horizontal frame 2 is perpendicular to the vertical frame 3, and the connection shaft installation hole 3a of the vertical frame 3 and the pilot hole for the connection shaft of the horizontal frame 2 are installed. 2a are aligned in a straight line, and the shaft portion 6b of the connecting shaft 6 is inserted into the lower connecting shaft hole 2a of the horizontal frame 2. As shown in FIG. The work up to this point is the first procedure.

(Second procedure)
Next, as shown in FIG. 20, a connection receiver 4 having a substantially inverted U-shaped engagement groove 4a opening toward the tip side is hammered into the metal fitting installation hole 2b of the horizontal frame 2 with a hammer or the like. Then, the engagement groove 4a of the connection receiving tool 4 is fitted into the small-diameter portion 5c of the connection shaft 5 so that the horizontal frame 2 and the vertical frame 3 are connected.

DESCRIPTION OF SYMBOLS 1... Connection structure 2... Horizontal frame 2a... Connection shaft preparation hole 3... Vertical frame 3a... Connection shaft insertion hole 3b... Head insertion hole 4... Connection receiver 4a... Engagement groove 4b Inclined surface portion 5 6 Connecting shaft 5a Head 5b Shaft 5c Small diameter portion 5d Inclined stepped portion 5e Engagement side shaft 5f Stepped stepped portion

Claims (6)

A frame member connection structure for connecting one side frame member and the other side frame member joined in a state orthogonal thereto with a metal fitting,
The one-side frame member communicates with a pilot hole for a connecting shaft drilled along the longitudinal direction of the member from the butt end surface, and an intermediate position of the pilot hole for the connecting shaft in a direction orthogonal to the pilot hole for the connecting shaft. and a fitting installation hole with one end facing the outside, and the other side frame member has a connecting shaft insertion hole penetrating in the thickness direction from the outer surface,
A substantially inverted U-shaped engaging groove that opens toward the tip side is formed in a state in which the connecting shaft insertion hole of the other side frame member and the connecting shaft pilot hole of the one side frame member are aligned in a straight line. A connection receiver is installed in the fitting installation hole, has a head portion and a shaft portion, has an engagement side shaft portion having a predetermined diameter on the shaft portion, and is adjacent to the head side of the engagement side shaft portion. Then, a connecting shaft having a small diameter portion with a small shaft diameter is inserted from the connecting shaft insertion hole of the other side frame member, and the shaft portion is inserted into the connecting shaft prepared hole of the one side frame member. 2. A connection structure of frame members, wherein said one side frame member and said other side frame member are connected by engaging an engagement groove of said connection receiving member with a small diameter portion of said connection shaft. A frame member connection structure for connecting one side frame member and the other side frame member joined in a state orthogonal thereto with a metal fitting,
The one-side frame member communicates with a pilot hole for a connecting shaft drilled along the longitudinal direction of the member from the butt end surface, and an intermediate position of the pilot hole for the connecting shaft in a direction orthogonal to the pilot hole for the connecting shaft. and a fitting installation hole with one end facing the outside, the other frame member has a connecting shaft installation hole along the thickness direction from the inner surface,
A substantially inverted U-shaped engaging groove that opens toward the tip side is formed in a state in which the connecting shaft insertion hole of the other side frame member and the connecting shaft pilot hole of the one side frame member are aligned in a straight line. A connection receiver is installed in the fitting installation hole, has a head portion and a shaft portion, has an engagement side shaft portion having a predetermined diameter on the shaft portion, and is adjacent to the head side of the engagement side shaft portion. A connecting shaft having a small diameter portion with a smaller shaft diameter and a threaded portion on the opposite side of the head portion is screwed into the connecting shaft installation hole of the other side frame member. The one-side frame member and the other-side frame member are engaged with the small-diameter portion of the connecting shaft in a state in which the shaft portion is inserted into the pilot hole for the connecting shaft. A connecting structure of frame members, characterized in that the and are connected to each other. A method for connecting the frame member connection structure according to any one of claims 1 and 2,
The other side frame member and the one side frame member are perpendicular to each other, and the connection shaft insertion hole or the connection shaft installation hole of the other side frame member and the connection shaft prepared hole of the one side frame member are aligned in a straight line. a first step of installing the connecting shaft in a state in which they are aligned and at least the shaft portion is inserted into the pilot hole for the connecting shaft of the one-side frame member;
A connection receiver having a generally inverted U-shaped engagement groove that opens toward the tip end is driven into the metal fitting installation hole of the one-side frame member, and the connection receiver is engaged with the small diameter portion of the connection shaft. and a second step of connecting the one-side frame member and the other-side frame member by engaging a matching groove. In the substantially inverted U-shaped engagement groove of the connection receiver, an end portion of the engagement groove has an inclined surface portion, and the small diameter portion of the connecting shaft corresponds to the inclined surface portion. 4. The method of connecting frame members according to claim 3, wherein the connecting shaft is retracted in the insertion direction by driving the connecting support. An engagement side shaft portion having a predetermined diameter is provided at an intermediate portion of the shaft portion, and the small diameter portion is adjacent to the head side of the engagement side shaft portion and has a reduced shaft diameter. 2. A connecting fitting for a connecting structure of frame members according to claim 1, wherein a connecting fitting having a . It has a head portion and a shaft portion, and the shaft portion has an engagement side shaft portion with a predetermined diameter, and a small diameter portion with a small shaft diameter adjacent to the head side of the engagement side shaft portion. and a connecting shaft having a threaded portion on the side opposite to the head portion and a connecting receiving tool having a generally inverted U-shaped engaging groove opening toward the distal end side. Connecting fittings for the connecting structure of frame members.

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