JP2742877B2 - Connecting member for connecting a long member to a long bolt and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fitting for connecting a long member to a long bolt, and more particularly, to a brace for swaying a brace or the like at an appropriate position of a long bolt suspended from a ceiling. The present invention relates to a connecting member for connecting a long member to a long bolt for connecting the long member.

[0002]

2. Description of the Related Art Conventionally, as a fitting for connecting a long member to a long bolt, for example, as described in Japanese Patent Publication No. Sho 61-2135, a hanging bolt is attached to a pair of distal ends of a U-shaped fastening piece. Are provided, each of which is provided with a hook-shaped bolt hole for fitting the same, and presses an M-groove portion of an M-shaped channel corresponding to another long member to a suspension bolt with a tightening screw.
According to this conventional technique, the displacement of the suspension bolt in the longitudinal direction is prevented by pressing the three points of the pair of bolt holes and the M groove.

However, according to the above-mentioned prior art, the displacement of the hanging bolt in the longitudinal direction cannot be sufficiently prevented unless a special long member such as an M-shaped channel is used. Further, even if the hook-shaped bolt hole is intended to be sufficiently engaged with the suspension bolt, it is difficult and complicated to perform a process such as providing a female screw in the bolt hole. Reducing the thickness of the hole portion causes a decrease in the strength of the portion.

Further, in the above-mentioned prior art and well-known upper steady rest receiving connecting fittings and the like, in order to connect a long member such as a steady rest brace to the hanging bolt in an inclined state, the connecting fitting for the hanging bolt is required. The fastening screw for attachment and the fastening screw for attaching the brace to the connection fitting must be separately provided, and the connection work is complicated.

[0005]

In view of such a problem,
A first object of the present invention is to provide a connection fitting which can be connected to a general-purpose long member and can be easily manufactured, but is hard to be displaced in the longitudinal direction of a long bolt, and a method of manufacturing the same. .

A second object of the present invention is to provide a connection fitting which can connect another long member to a long bolt in an inclined manner by a tightening operation at one place. It is in.

[0007]

Means for Solving the Problems To achieve the first object, a first characteristic configuration of the connecting bracket according to the present invention is as follows.
A bolt fitting portion that fits into the long bolt from a side surface of the long bolt, and a long member fit that fits into the long member from the side surface of the other long member and faces the bolt fitting portion. A joint portion is provided, and the bolt fitting portion and the long member fitting portion are tightened so as to be close to each other, so that the bolt and the other member are provided between the bolt fitting portion and the long member fitting portion. Tightening means for sandwiching the long member is provided, the plate material is curved in a groove shape to form the bolt fitting portion, and a bottom portion of the bolt fitting portion at a middle portion in the longitudinal direction of the long bolt is locally located. In this case, the small burr-shaped projection that engages with the thread groove of the long bolt is projected.

[0008] A second characteristic configuration of the connection fitting according to the present invention is that, in addition to the first characteristic configuration, the small protrusion is
A cross-shaped notch is formed at the bottom of the bolt fitting portion, and the cut portion is formed by pressing the bolt fitting portion from outside to inside.

Further, in order to achieve the second object, a third characteristic configuration of the connection fitting according to the present invention includes a first fitting having the bolt fitting portion in addition to the first or second characteristic configuration. The long member fitting portion is provided on a second member separate from the member, and the tightening means is configured with a tightening bolt oriented in a direction orthogonal to the longitudinal direction. Thus, the second member is configured to be angularly displaceable with respect to the first member.

[0010] In order to achieve the first object, a characteristic structure of a method of manufacturing a connection fitting according to the present invention is that a cross-shaped cut is formed at the bottom of the bolt fitting portion, and the cut is formed by a bolt. The small projections are formed to protrude by pressing the fitting portion from the outside to the inside.

[0011]

According to the first feature, when the bolt fitting portion and the long member fitting portion are tightened so as to be close to each other using the tightening means, the long bolt and the other long portions are interposed therebetween. The length member can be clamped. In other words, the long bolt can be pressed against the groove-like bottom of the bolt fitting portion via another long member. Since the burr-shaped small protrusion is projected from the bottom of the bolt fitting portion, the small protrusion engages with the thread groove of the long bolt by the above-mentioned pressing, so that the displacement of the connection fitting in the bolt longitudinal direction can be prevented. In addition, since the small projections are provided locally on the bolt fitting portion, the pressing force can be concentrated on the small projections, and the engagement of the small projections with the screw groove is ensured. And, by providing a small projection at the middle part in the longitudinal direction of the bolt engaging part, the peripheral part of the burr-shaped small projection is planar, so even if the small projection is slightly deformed, it can be removed from the bottom of the bolt fitting part. Remains protruding,
Engage well with the thread groove of the long bolt.

Further, according to the second characteristic configuration, since a cross-shaped cut is made in the plate material constituting the bolt fitting portion and pressed, the small-sized protrusion is efficiently engaged with the screw groove. Can be combined.

According to the third feature, the tightening bolts constituting the tightening means are oriented in a direction orthogonal to the longitudinal direction of the long bolts. Since the second member having the long member fitting portion is configured to be angularly displaceable with respect to the first member having the bolt fitting portion, the other long member can be appropriately attached to the long bolt. It is possible to connect at an angle. In addition, these connections can be made by operating only one tightening bolt.

[0014]

As described above, according to the first and second features of the connecting fitting according to the present invention, a general-purpose elongate can be obtained by a simple process of projecting a burr-like projection on a curved plate material. It has become possible to sufficiently prevent the displacement of the connecting fitting in the longitudinal direction of the long bolt while using the member.

According to the third characteristic configuration of the above-mentioned connecting fitting, in a state where the other long member is inclinedly crossed at an appropriate angle with respect to the long bolt, these two members are tightened at one place. It has become possible to provide a connection fitting that can be connected by a tightening operation of a bolt for use.

On the other hand, according to the characteristic structure of the method of manufacturing the connection fitting, it is possible to form the projection which can be securely engaged with the thread groove of the long bolt by a simple processing compared with the case of forming a female screw or the like. It became so.

[0017]

Next, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a foundation structure of a ceiling, in which a field support 3 for attaching a ceiling field via a hanger 4 to a suspension bolt 2 which is a long bolt suspended from a ceiling slab 1 is lowered. Although not shown, a plurality of these suspension bolts 2 are provided at appropriate locations in the longitudinal direction of the field support 3 to support the field support horizontally. In addition, in order to perform the steadying of the field support 3 in the horizontal direction, another steady member, that is, a steady channel 5, is inclined between the vicinity of the root of the suspension bolt 2 on the ceiling slab 1 side and the field support 3. It is hung over. Here, the connection fitting 7 according to the present invention connects the upper end of the steady rest channel 5 to the suspension bolt 2. Also, the notch formed at the lower end of the steady rest channel 5 is fitted to the flange of the field edge support 3 to hold down the holding member 7.
The lower end of the steady channel is connected by pressing the lower end. The suspension bolt 2 and the steady channel 5 in this embodiment are general-purpose members according to JIS standards and the like.

As shown in FIGS. 2 to 5, the connection fitting 6 according to the present invention is divided into separate first and second members 10 and 20, and these are fastened as fastening means. It is connected by bolts 30.

The first member 10 has a connecting flange having a long hole 16 and a steel plate material curved into a groove shape having a substantially U-shaped cross section so as to be substantially along the outer diameter of the suspension bolt 2. In addition, a bolt fitting portion 12 that fits into the hanging bolt 2 from the side surface of the hanging bolt 2 is provided. This bolt fitting part 1
2, two small projections that engage with the thread grooves 2a of the suspension bolts 2 are locally provided. On the other hand, the second member 20 has a connection flange having a screw hole 26 and a channel fitting portion 22 which is a long member fitting portion which fits into the steady channel 5 from the side surface of the steady channel 5. Are provided. With the bolt fitting portion 12 and the channel fitting portion 22 facing each other, the tightening bolt 30
Through the long hole 16 of the first member 10 and screwed into the screw hole 26 of the second member 20,
It is configured such that they can be tightened so as to be close to each other.

Here, the fastening bolts 30 are oriented in a direction H perpendicular to the longitudinal direction V of the suspension bolts 2 in a state where the connection fitting is attached to the suspension bolts 2. Since the second member 20 can be angularly displaced relative to the first member 10 around the fastening bolt 30, the steady channel 5 can be connected to the suspension bolt 2 in an inclined manner.

As shown in FIGS. 2 to 4, the steady rest channel 5 has a bottom and a pair of flange ends 5b. The channel fitting portion 22 is shaped to fit into the steady channel 5 from the bottom 5a side. Further, the suspension bolt 2 is fastened between the bolt fitting portion 12 and the channel fitting portion 22 by fastening with the fastening bolt 30.
In order to tighten the steady rest channel 5 more strongly, the channel fitting portion 22 is formed to be inclined so as to be closer to the bolt fitting portion 12 toward the portion opposite to the fastening bolt 30. . In the center of the bolt fitting portion 22, there is provided a through hole 22 for allowing a tap screw to pass therethrough.
a is formed.

As shown in FIGS.
Are formed by deforming the bottom of the bolt fitting portion 12 and projecting toward the channel fitting portion 22 side. In forming the small projections 14, first, a cross-shaped cut 14a crossing in a cross shape is formed on the bottom of the bolt fitting portion 12 by a press machine, a laser beam, electric discharge machining or the like. Then, the punch is penetrated by pressing the intersection of the cut 14a with the punch P from the outside to the inside of the bolt fitting portion 12, that is, from the top side of the convex curved surface toward the U-shaped groove side. The hole 14b is formed, and the plate material corresponding to the hole 14b is deformed to locally project the burr-shaped small projection 14.

The cuts 14a are for making corners of the small projections 14. Therefore, the cuts 14a do not necessarily have to penetrate the front and back of the bottom, but the small projections 14 are formed using a sharp punch or the like at the tip. In this case, in order to position the tip of the punch, it is desirable that at least the intersection of the cuts 14a is desired on the convex curved surface side of the bolt fitting portion 12. The pressing of the intersection may be performed by using a punch, hitting a punch with a hammer, or using a drill.

Here, by providing the small projection 14 at the intermediate portion of the bolt engaging portion in the longitudinal direction V, the peripheral portion of the small projection 14 has a planar shape. It remains protruding from the bottom surface of the bolt fitting portion and sufficiently engages with the thread groove 2a of the suspension bolt. Further, it is desirable that the small protrusion 14 is provided at the center of the bolt fitting portion 12 in the longitudinal direction V. Even when the bolt fitting portion 12 is slightly inclined with respect to the suspension bolt 2 in the direction H perpendicular to the longitudinal direction V, the screw groove 2a can be sufficiently fitted into the small projection 14, and the fastening bolt 30 is the most efficient
This is because it is possible to concentrate on the number 4.

In connecting the steady rest channel 5 to an appropriate position of the suspension bolt 2, first, the tightening bolt 30 is loosened, and then the suspension bolt 2 is connected to the suspension bolt 2 through the opening of the bolt fitting portion 12. The hanging bolt 2 is fitted into the bolt fitting portion 12 by bringing the first member 10 close to the side from the side.
Next, the steady channel 5 is fitted to the channel fitting portion 22 of the second member 20 from the bottom 5a side of the steady channel 5 in a state where the steady channel 5 is in contact with the suspension bolt 2, and the fastening bolt 30 is tightened. . Then, the steady channel 5 and the suspension bolt 2 are sandwiched between the bolt fitting portion 12 and the channel fitting portion 22.

By this pinching, the small projections 14 of the bolt fitting portion 12 bite into the thread grooves 2a of the suspension bolts 2, and the displacement of the connecting fitting 6 in the longitudinal direction V is prevented. Also, the end 5b of the flange of the steady channel 5
By cutting into the surface of the suspension bolt 2 which is uneven by the screw groove 2a, the movement of the steady channel 5 in the longitudinal direction is prevented. As a result, the connection between the two is made firm. In order to further firmly prevent the deviation of the steady channel 5 in the longitudinal direction, a tap screw that cuts a thread groove at the same time as forming a through hole may be used. In this case, the tap screw may be inserted into the through hole 22 a formed in the channel fitting portion 22, and the tap screw may be screwed into the steady channel 5.

Next, another embodiment of the present invention will be described. The “other long member” in the present invention is not limited to the steady rest channel as shown in the first embodiment, but is a steady rest bolt 5 used as a long brace substantially similar to the suspension bolt 2.
It may be. In this case, as shown in FIGS. 8 and 9, the shapes of the first member 10 and the second member 20 are substantially the same, and the channel fitting portion 28 is fitted along the outer diameter of the long bolt. Formed. According to such a configuration,
The connection fitting 6 becomes difficult to move in the longitudinal direction of the hanging bolt 2 and the steady rest bolt 5 due to the bite of the small projection 14.

Further, in each of the above embodiments, the present invention is applied to the upper steady rest, but may be applied to the lower steady rest shown by reference numeral 7 in FIG. In this case, the "long bolt" becomes a steady rest bolt used as a brace instead of the steady rest channel 5,
The “other long member” that fits into the channel fitting part is a field support.

[Brief description of the drawings]

FIG. 1 is a side view showing a foundation structure of a ceiling.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an exploded perspective view of a connection fitting.

FIG. 4 is a plan view of a connection fitting.

FIG. 5 is a view of the first member as viewed from a bolt fitting portion side.

6A is an enlarged view of a small projection shown in FIG. 5, and FIG. 6B is a cross-sectional view taken along line BB of FIG.

FIG. 7 is a perspective view for explaining a step of forming a small projection on the first member.

FIG. 8 is an exploded perspective view showing a second embodiment of the connection fitting.

FIG. 9 is a side view showing a state where the connection fitting of FIG. 8 is used.

[Explanation of symbols]

 2 Long bolt 5 Other long member 12 Bolt fitting part 22 Long member fitting part 30 Tightening means V Long direction of long bolt 2a Screw groove of long bolt 14 Small protrusion. . .

Claims (4)

(57) [Claims] 1. A connecting member of a long member to a long bolt for connecting another long member (5) to an appropriate position of the long bolt (2). A bolt fitting portion (1) fitted to the long bolt (2) from the side surface
2) and a long member fitting portion (22) that fits into the long member (5) from the side surface of the other long member (5) and faces the bolt fitting portion (12). The bolt fitting portion (12) and the long member fitting portion (22) are tightened so as to be close to each other, so that the bolt fitting portion (12) and the long member fitting portion (22) are located between the bolt fitting portion (12) and the long member fitting portion (22). Tightening means (30) for sandwiching the long bolt (2) and the other long member (5) is provided, and the plate material is bent into a groove to form the bolt fitting portion (12). By locally deforming the bottom of the long bolt (2) in the longitudinal direction (V) of the bolt fitting portion (12) at the intermediate portion, the long bolt (2)
And a connecting member for connecting a long member to a long bolt having a small burr-like projection (14) engaged with the screw groove (2a). 2. The small projection (14) forms an intersecting cut (14a) at the bottom of the bolt fitting portion (12), and the cut (14a) portion is formed by the bolt fitting portion (12).
The connecting member for connecting a long member to a long bolt according to claim 1, wherein the connecting member is formed by pressing inward from outside to inside. 3. The elongated member fitting section (22) is provided on a second member (20) separate from the first member (10) having the bolt fitting section (12), and The fastening means is constituted by a fastening bolt (30) oriented in a direction (H) orthogonal to the longitudinal direction (V), and around the fastening bolt (30) with respect to the first member (10). The connecting member for connecting a long member to a long bolt according to claim 1 or 2, wherein the second member (20) is configured to be capable of angular displacement. 4. A method of manufacturing a connecting member for connecting a long member to a long bolt according to claim 1, wherein a cross-shaped cut (14a) is formed at a bottom of the bolt fitting portion (12).
The notch (14a) is pressed inward from the outside of the bolt fitting portion (12) to the small protrusion (14).
A method for manufacturing a metal fitting for connecting a long member to a long bolt that is formed so as to protrude.