JP3156129B2 - Different diameter joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting two raceways having different diameters in a straight line.

[0002]

2. Description of the Related Art In a building such as a building, a factory, a station building, etc., as shown in FIG. 11, a raceway 2 is hung horizontally from a ceiling or an upper beam by a plurality of hanging supports 1, and the raceway 2 is supported. A lighting fixture (not shown) and the like are fixed to the way 2, and an electric cable (not shown) is accommodated in the raceway 2 and wired. Since the length of one raceway is limited, the ends of the plurality of raceways 2 are connected and fixed to the junction box 4 and connected in a straight line or a right angle. (This kind of thing is called raceway, metal wire ぴ, metal duct, etc. depending on the size of the size,
Hereinafter collectively referred to as raceway)

As shown in FIG. 12, a junction box 4 has sockets 6, 6,... Of the same size having a U-shaped cross section mounted on a rectangular box-like box body 5 having an open upper surface so as to project in all directions. The raceways 2, 2,... Having the same dimensions are attached to the sockets 6, 6,. (Note that FIG. 1
In FIG. 1, reference numeral 8 denotes a lid attached to the raceway 2. )

[0004]

As described above, conventionally,
A plurality of raceways 2, 2,... Having the same dimensions are connected to the junction box 4, and an electric cable in a certain raceway 2 is branched and wired to another raceway 2 in the junction box 4 as necessary. .

[0005] Therefore, depending on the wiring situation, a raceway 2 in one direction may accommodate a large number of electric cables, while a raceway 2 in another direction may accommodate a small number of electric cables.

Therefore, it is advantageous to use a small-diameter (low-height) raceway for a raceway in which the number of electric cables accommodated is small because the cost is reduced and the weight is reduced.

However, since the plurality of sockets 6, 6,... In the junction box 4 are all for raceways having the same diameter, only the raceways having the same diameter can be connected to the junction box 4. For this reason, when the electric cable is branched and accommodated in a small number, even if it is desired to use a small-diameter raceway from the viewpoint of cost, a large-diameter raceway must be used as shown in FIGS. Therefore, the cost was high.

An object of the present invention is to solve such a problem and to provide a different-diameter joint which can connect two raceways having different diameters at an arbitrary position in a linear direction.

[0009]

According to a first aspect of the present invention, there is provided a joint having a large diameter raceway for mounting a large diameter raceway and a small diameter raceway. A small-diameter raceway mounting portion for mounting is connected in a straight line direction, and the large-diameter raceway mounting portion is covered from the outside by a bottom plate, both side plates, and a bent edge at an upper end of the large-diameter raceway. A first bottom plate and first side plates vertically provided from both sides of the first bottom plate; a screw hole in the first bottom plate; A bottom plate of the way, both side plates, a second bottom plate covered from the outside by a bent edge at an upper end of the both side plates, and second side plates vertically erected from both sides of the second bottom plate; A screw hole is provided in the second bottom plate. Inserting the large-diameter raceway mounting portion from the end of the large-diameter raceway so that the large-diameter raceway mounting portion is covered from the outside by the large-diameter raceway; The bottom of the large-diameter raceway is pressed in the direction away from the first bottom plate of the large-diameter raceway mounting portion with the tip of a screw screwed into the screw hole of the bottom plate of the large-diameter raceway, and the base of the bent edge of the large-diameter raceway is pressed. The end of the large-diameter raceway is fixed to the large-diameter raceway mounting portion by pressing the upper end of the first side plate of the large-diameter raceway mounting portion on the inner surface, and the small-diameter raceway mounting portion is The small-diameter raceway mounting portion is inserted from the end of the small-diameter raceway so as to be covered from the outside by the small-diameter raceway. The bottom plate of the small-diameter raceway is pressed in a direction away from the second bottom plate of the small-diameter raceway attachment portion with the tip of a screw screwed into the screw hole of the bottom plate of the small-diameter raceway, and the small-diameter raceway is bent at the base inner surface of the bent edge. The ends of the small-diameter raceway are fixed to the small-diameter raceway mounting portion by pressing the upper ends of the second side plates of the small-diameter raceway mounting portion.
Therefore, the large-diameter raceway and the small-diameter raceway can be easily connected at an arbitrary position in the linear direction.

According to the present invention, the first bottom plate of the large-diameter raceway mounting portion and the second bottom plate of the small-diameter raceway mounting portion have the same height, and the large-diameter raceway mounting portion is provided. The upper end of the first side plate is higher than the upper end of the second side plate of the small-diameter raceway mounting portion, so that the bottom plate of the large-diameter raceway and the bottom plate of the small-diameter raceway have substantially the same height. The large-diameter raceway and the small-diameter raceway can be connected in this state.

In the present invention, the upper ends of the first side plates of the large-diameter raceway mounting portion and the upper ends of the second side plates of the small-diameter raceway mounting portion are substantially the same height. Since the second bottom plate of the small-diameter raceway mounting portion is higher than the first bottom plate of the large-diameter raceway mounting portion, the upper surface of the large-diameter raceway and the upper surface of the small-diameter raceway have substantially the same height. The large-diameter raceway and the small-diameter raceway can be connected in this state.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a joint 1 of a different diameter according to the present invention.
0 illustrates one embodiment. The different diameter joint 10 is 2
A large-diameter raceway mounting portion 20 for mounting the large-diameter raceway 2 and a small-diameter raceway 2 'are for connecting the two different-diameter raceways 2, 2' in a linear direction. Diameter raceway mounting part 3 for
0 are continuously provided in the linear direction.

As shown in FIG. 1, the large-diameter raceway 2 comprises a bottom plate 2a and two side plates 2b, 2c parallel to each other so as to form a U-shaped cross section. And bent edges 2d and 2e bent obliquely downward (or horizontally).

Similarly, the small-diameter raceway 2 'also has two side plates 2'b parallel to the bottom plate 2'a so as to form a U-shaped cross section.
2'c, and has bent edges 2'd, 2'e bent obliquely downward (or horizontally) inward from the upper ends of both side plates 2'b, 2'c. .

Although the large-diameter raceway 2 and the small-diameter raceway 2 'have the same width of the bottom plates 2a, 2'a, the side plates 2'b, 2'c of the small-diameter raceway 2' are the same as the large-diameter raceway 2. The height is smaller than the side plates 2b and 2c.

The large-diameter raceway mounting portion 20 is provided with a bottom plate 2a and both side plates 2b and 2c of the large-diameter (high) raceway 2 and a bent edge portion 2 at an upper end of the both side plates 2b and 2c.
Bottom plate 20 which is covered from outside by d and 2e
a and two first side plates 20b and 20c parallel to each other, and two screw holes 2 in the first bottom plate 20a.
1, 21 (FIG. 4) are provided in the linear direction.

The small-diameter raceway mounting portion 30 is formed of a bottom plate 2'a and both side plates 2'b, 2'c of a small-diameter (low-height) raceway 2 ', and both side plates 2'b, 2'c. The bottom plate 30a and the second side plates 30 parallel to each other which are covered from the outside by the bent edges 2'd, 2'e at the upper end in a conforming manner.
b, 30c, and the second bottom plate 30a has, for example, two screw holes 31, 31 (FIG. 4) in a linear direction.

The large-diameter raceway mounting portion 20 and the small-diameter raceway 30 are integrally formed, and the first bottom plate 20a of the large-diameter raceway mounting portion 20 and the small-diameter raceway mounting portion 30 The second bottom plate 30a is integrally continuous with the bottom plate 30a and has the same height. The first side plates 20b and 20c of the large-diameter raceway mounting portion 20 and the second side plates of the small-diameter raceway mounting portion 30 are formed. 30
b, 30c are also integrally continuous, respectively,
b, 20c and the distance between the side plates 30b, 30c are the same, and the upper ends of the first side plates 20b, 20c of the large-diameter raceway mounting part 20 are the second of the small-diameter raceway mounting part 30. Upper portions of the second side plates 30b, 30c of the small-diameter raceway mounting portion 30 are horizontally cut out so as to be higher than upper end portions of the both side plates 30b, 30c.

The first side plates 20b and 20c of the large-diameter raceway mounting portion 20 and the small-diameter raceway mounting portion 30
Tapered portions 22 and 32 are provided at the upper ends of the opposite end portions of the second side plates 30b and 30c so as to be easily inserted into the inside of the raceway.

The first bottom plate 20a of the large-diameter raceway mounting portion 20 has screw holes 21 at two locations in the longitudinal direction.
21, a central hole 41 a of two recesses 41, 41 of a plastic protective base 40 having elasticity,
41a, the screws 42, 42 have their tips 42a,
42a is screwed into the screw holes 21 without projecting to the lower surface side of the bottom plate 20a.

Similarly, the second bottom plate 30a of the small-diameter raceway mounting portion 30 is provided with screw holes 31, 31 at two locations in the longitudinal direction, and is provided at two locations of the plastic protective base 40 having elasticity. The screws 42, 42 are screwed into the screw holes 31, 31 with the tips 42a, 42a not protruding to the lower surface side of the bottom plate 30a, passing through the central holes 41a, 41a of the concave portions 41, 41.

Therefore, as shown in FIGS. 2 to 5, the large-diameter raceway 2 is inserted into the inside of the large-diameter raceway 2 from the end so that the large-diameter raceway mounting portion 20 is covered from the outside by the large-diameter raceway 2. A screw 4 inserted into the mounting portion 20 over its entire length and screwed into the two screw holes 21, 21 of the first bottom plate 20 a of the large-diameter raceway mounting portion 20.
0, 40 is rotated by a driver, and the bottom plate 2a of the large-diameter raceway 2 is pressed by the tips 40a, 40a of the screws 40, 40 in a direction away from the first bottom plate 20a of the large-diameter raceway mounting portion 20, A large-diameter raceway mounting portion 20 is provided on the inner surface of the base of the bent edges 2d and 2e of the large-diameter raceway 2.
Upper ends 20b ', 20 of the first side plates 20b, 20c
By pressing c ′, the end of the large-diameter raceway 2 can be fixed to the large-diameter raceway mounting portion 20.

Similarly, the small-diameter raceway mounting portion 30 is inserted from the end into the small-diameter raceway 2 'so that the small-diameter raceway mounting portion 30 is covered from the outside by the small-diameter raceway 2'. Screws 40, 40 screwed into the two screw holes 31, 31 of the second bottom plate 30a of the mounting portion 30 are rotated by a screwdriver to
The bottom plate 2'a of the small-diameter raceway 2 'is pressed in the direction away from the second bottom plate 30a of the small-diameter raceway mounting portion 30 at the leading end of the small-diameter raceway 2'. The end of the small-diameter raceway 2 'is fixed to the small-diameter raceway mounting portion 30 by pressing the upper end portions of the second side plates 30b and 30c of the small-diameter raceway mounting portion 30 against the inner surface of the base portion of the small-diameter raceway mounting portion 30. be able to.

Since the head 40b of the screw 40 is located in the recess 41, the electric cable (not shown) housed in the raceways 2, 2 'is not damaged by the head 40b of the screw 40. .

As described above, since the large-diameter raceway 2 and the small-diameter raceway 2 'can be connected in a straight line by the different-diameter joint 10 of the present invention, for example, the large-diameter race connected to the junction box 4 shown in FIG. When the number of electric cables accommodated in the way 2 is small, the size can be reduced by connecting the small-diameter raceway 2 ′ to the large-diameter raceway 2 with the different-diameter joint 10, thereby reducing the cost. Can be lowered.

In the above embodiment, as shown in FIG. 2, the large-diameter raceway 2 and the small-diameter raceway 2 'are mounted with the bottom surfaces 2a and 2'a at substantially the same height. In the embodiments 10 to 10, the large-diameter raceway 2
And the upper surface of the small-diameter raceway 2 'can be connected so that they have substantially the same height.

The different-diameter joint 10 shown in FIGS. 6 to 10 is also for connecting two different-diameter raceways 2 and 2 'in a straight line direction, and the large-diameter raceway 2 is attached thereto. Large diameter raceway mounting part 20 and small diameter raceway mounting part 3 for mounting small diameter raceway 2
0 are continuously provided in the linear direction.

The large-diameter raceway mounting portion 20 is provided with a bottom plate 2a and both side plates 2b, 2c of the large-diameter (high) raceway 2, and a bent edge portion 2 at an upper end of the both side plates 2b, 2c.
Bottom plate 20 which is covered from outside by d and 2e
a and first side plates 20b and 20c parallel to each other, and a screw hole 21 is provided in the first bottom plate 20a.

The small-diameter raceway mounting portion 30 is formed of a bottom plate 2'a and both side plates 2'b, 2'c of a small-diameter (low-height) raceway 2 ', and both side plates 2'b, 2'c. The bottom plate 30a and the second side plates 30 parallel to each other which are covered from the outside by the bent edges 2'd, 2'e at the upper end in a conforming manner.
b, 30c and a screw hole 31 in the second bottom plate 30a. The space between the side plates 20b and 20c of the large-diameter raceway mounting portion 20 and the space between the side plates 30b and 30c of the small-diameter raceway mounting portion 30 are the same.

The large-diameter raceway mounting portion 20 and the small-diameter raceway mounting portion 30 are formed separately from each other.
b, mounting piece 3 extended from one end of 30c
The outer surfaces of 2b and 32c are large-diameter raceway mounting portions 20.
The upper ends 20b ', 20c' of the first side plates 20b, 20c of the large-diameter raceway attachment 20 are fixed to the inner surfaces of the first side plates 20b, 20c by welding or other appropriate means.
And both second side plates 30 of the small-diameter raceway attachment portion 30
b, 30c have substantially the same upper end portions 30b ', 30c', and the first bottom plate 2 of the large-diameter raceway mounting portion 20.
Second bottom plate 3 of raceway mounting portion 30 having a diameter smaller than 0a
0a is set high.

At the end of the second bottom plate 30a of the small-diameter raceway mounting portion 30 on the side of the large-diameter raceway mounting portion 20, a bent piece 33 bent vertically downward is protruded. , Bottom plate 2 of large diameter raceway attachment 20
The gap at the top of 0a is closed.

The first side plates 20b and 20c of the large-diameter raceway mounting section 20 and the small-diameter raceway mounting section 30
Tapered portions 24, 34 are provided at the upper ends of the opposite end portions of the second side plates 30b, 30c so as to be easily inserted into the inside of the raceway.

The first bottom plate 20a of the large-diameter raceway mounting portion 20 has screw holes 21 at two locations in the longitudinal direction.
21, a central hole 41 a of two recesses 41, 41 of a plastic protective base 40 having elasticity,
41a, the screws 42, 42 have their tips 42a,
42a is screwed into the screw holes 21 without projecting to the lower surface side of the bottom plate 20a.

Similarly, the second bottom plate 30a of the small-diameter raceway mounting portion 30 is provided with screw holes 31, 31 at two locations in the longitudinal direction, and is provided at two locations of the protective base 40 made of elastic plastic. The screws 42, 42 are screwed into the screw holes 31, 31 with the tips 42a, 42a not protruding to the lower surface side of the bottom plate 30a, passing through the central holes 41a, 41a of the concave portions 41, 41.

Therefore, similarly to the case of FIG. 4, the large-diameter raceway mounting portion 20 is tightened with screws as shown in FIG.
The large-diameter raceway 2 and the small-diameter raceway 2 'may be fixed to the small-diameter raceway mounting portion 30 so that the upper surfaces of the large-diameter raceway 2 and the small-diameter raceway 2' are substantially the same height. Can be linked.

In both the embodiment shown in FIG. 1 and the embodiment shown in FIG. 6, a lid (not shown) may be attached to the opening surface of the connected raceway 2, 2 '. In the embodiment shown in FIG. There is a step between the upper surface opening of the large-diameter raceway 2 fixed to the large-diameter raceway mounting portion 20 and the upper surface opening of the small-diameter raceway 2 ′ mounted to the small-diameter raceway mounting portion 30. 'On the lid (not shown)
Is attached, the step opening at the end of the large-diameter raceway 2 remains unblocked.

For this reason, the joint cover 50 shown in FIG. 2 is used to close the stepped opening 2g at the end of the large-diameter raceway 2. That is, as shown in FIG. 2, the joint cover 50 is bent perpendicularly from both sides of the flat plate portion 51 that covers the upper opening surface of the large-diameter raceway 2,
Both side edges 52a, 52b elastically fitted to the upper ends of both side plates 2b, 2c of the large-diameter raceway 2 from the outside, and the step opening 2g vertically bent from one end of the flat plate portion 51 (FIG. 4) to cover the step portion.

Accordingly, the both side edges 52a and 52b are elastically pushed open from the upper side to the upper ends of both side plates 2b and 2c of the large diameter raceway 2 so as to cover the upper surface opening of the large diameter raceway 2. By fitting, the upper surface opening of the large-diameter raceway 2 can be covered with the flat plate portion 51 and the step opening plate 2g can be covered with the step cover plate portion 53. Also, since it is elastically attached, it can be easily removed on the contrary.

[0039]

As described above, the different diameter joint according to the first aspect of the present invention is a large diameter raceway mounting portion for mounting a large diameter raceway and a small diameter raceway for mounting a small diameter raceway. A first bottom plate which is connected to the mounting portion in a linear direction, and wherein the large-diameter raceway mounting portion is covered from the outside by a bottom plate, both side plates of the large-diameter raceway, and a bent edge at an upper end of the both side plates; The first bottom plate includes first side plates vertically provided from both sides thereof, and the first bottom plate includes a screw hole, and the small-diameter raceway mounting portion includes a bottom plate of the small-diameter raceway, and both side plates. A second bottom plate covered from the outside by a bent edge at an upper end of the both side plates, and second side plates vertically erected from both sides of the second bottom plate. Large diameter raceway with screw holes The large-diameter raceway mounting portion is inserted from the end of the large-diameter raceway so that the attachment portion is covered from outside by the large-diameter raceway, and is inserted into a screw hole of the first bottom plate of the large-diameter raceway mounting portion. The bottom end of the large-diameter raceway is pressed in a direction away from the first bottom plate of the large-diameter raceway mounting portion with the tip of the screwed screw, and the large-diameter raceway mounting portion is attached to the bent edge of the large-diameter raceway. By pressing the upper ends of the first side plates, the end of the large-diameter raceway is fixed to the large-diameter raceway mounting portion, and the small-diameter raceway mounting portion is covered from outside by the small-diameter raceway. The small-diameter raceway mounting portion is inserted from the end of the small-diameter raceway into the end of a screw threaded into a screw hole of the second bottom plate of the small-diameter raceway mounting portion. And pressing the bottom plate of the small-diameter raceway in a direction away from the second bottom plate of the small-diameter raceway mounting portion so that the upper ends of the second side plates of the small-diameter raceway mounting portion are bent at the bent edges of the small-diameter raceway mounting portion. By pressing, the end of the small-diameter raceway is fixed to the small-diameter raceway attachment portion. Therefore, the large-diameter raceway and the small-diameter raceway can be easily connected at an arbitrary position in the linear direction.

According to a second aspect of the present invention, the first bottom plate of the large-diameter raceway mounting portion and the second bottom plate of the small-diameter raceway mounting portion have the same height, and the large-diameter raceway mounting portion is provided. The upper end of the first side plate is higher than the upper end of the second side plate of the small-diameter raceway mounting portion, so that the bottom plate of the large-diameter raceway and the bottom plate of the small-diameter raceway have substantially the same height. The large-diameter raceway and the small-diameter raceway can be connected in this state.

In the present invention, the upper ends of the first side plates of the large-diameter raceway mounting portion and the upper ends of the second side plates of the small-diameter raceway mounting portion are substantially the same height. Since the second bottom plate of the small-diameter raceway mounting portion is higher than the first bottom plate of the large-diameter raceway mounting portion, the upper surface of the large-diameter raceway and the upper surface of the small-diameter raceway have substantially the same height. The large-diameter raceway and the small-diameter raceway can be connected in this state.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of a use state of the embodiment.

FIG. 3 is a plan view of the use state of the embodiment.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a sectional view taken along line BB in FIG. 4;

FIG. 6 is a perspective view of another embodiment of the present invention.

FIG. 7 is a perspective view of a use state of the embodiment.

FIG. 8 is a plan view of the use state of the embodiment.

9 is a sectional view taken along the line CC in FIG. 8;

10 is a sectional view taken along line DD in FIG. 9;

FIG. 11 is a perspective view showing an installed state of a raceway.

FIG. 12 is an explanatory diagram showing a connection between a raceway and a junction box.

[Explanation of symbols]

 2 Large Diameter Raceway 2 'Small Diameter Raceway 10 Different Diameter Joint 20 Large Diameter Raceway Attachment 30 Small Diameter Raceway Attachment 40 Protective Base 42 Screw 50 Joint Cover

Claims (3)

(57) [Claims] 1. A joint of different diameters for connecting two raceways of different diameters in a straight line direction, comprising a large-diameter raceway mounting portion for mounting a large-diameter raceway and a small-diameter raceway. A small-diameter raceway mounting portion for mounting is continuously provided in a straight line direction, and the large-diameter raceway mounting portion is covered from outside by a bottom plate, both side plates of the large-diameter raceway, and a bent edge at an upper end of the both side plates. A first bottom plate, and first side plates vertically provided from both sides of the first bottom plate.
A bottom plate of the small-diameter raceway, both side plates, a second bottom plate covered from outside by a bent edge at an upper end of the both-side plate, and the second bottom plate. A second side plate vertically erected from both sides of the
The large diameter raceway mounting portion is inserted from the end of the large diameter raceway so that the large diameter raceway mounting portion is covered from the outside by the large diameter raceway, The large-diameter raceway is pressed by pushing the bottom plate of the large-diameter raceway away from the first bottom plate of the large-diameter raceway mounting portion with the tip of a screw screwed into the screw hole of the first bottom plate of the way mounting portion. Fixing the end of the large-diameter raceway to the large-diameter raceway mounting portion by pressing the upper end portions of the first side plates of the large-diameter raceway mounting portion against the base inner surface of the bent edge portion; The small-diameter raceway mounting portion is inserted from the end of the small-diameter raceway so that the small-diameter raceway mounting portion is covered from the outside by the small-diameter raceway, and the small-diameter raceway is mounted. B. The small-diameter raceway is bent by pressing the bottom plate of the small-diameter raceway away from the second bottom plate of the small-diameter raceway mounting portion with a tip end of a screw screwed into a screw hole of the second bottom plate of the mounting portion. The end of the small-diameter raceway is fixed to the small-diameter raceway mounting portion by pressing the upper end portions of the second side plates of the small-diameter raceway mounting portion against the base inner surface of the edge. Different diameter fittings. 2. A first bottom plate of the large-diameter raceway mounting portion, wherein a first bottom plate of the large-diameter raceway mounting portion and a second bottom plate of the small-diameter raceway mounting portion are at the same height.
2. The joint of claim 1, wherein the upper ends of the two side plates are higher than the upper ends of the second side plates of the small-diameter raceway mounting portion. 3. The large-diameter raceway mounting portion has upper and lower ends of first and second side plates of the small-diameter raceway mounting portion having substantially the same height. The joint according to claim 1, wherein a second bottom plate of the small-diameter raceway mounting portion is higher than a first bottom plate of the raceway mounting portion.