JP2021021511A - Duct cover and heat source machine - Google Patents

Abstract

To provide a duct cover for a heat source machine which enables easy installation of electric wires, and to provide the heat source machine.SOLUTION: A bottom plate 1c of a duct cover 1 has a first through hole 1ca for passing a first electric wire 31 and is disposed within an exterior case 11. A first support part 1a of the duct cover 1 extends downward from the bottom plate 1c and is inserted into a first electric wire insertion hole 11ba. The first through hole 1ca has: a first arc part CA1 having a first diameter DA; and a second arc part CA2 having a second diameter DB larger than the first diameter DA. The first support part 1a is connected to the bottom plate 1c along an outer periphery of the first arc part CA1 and has a first cutout part CR1 at a position immediately below the second arc part CA2.SELECTED DRAWING: Figure 5

Description

The present invention relates to a conduit cover and a heat source machine.

Conduit covers used for heat source devices such as combustion devices and hot water supply devices are disclosed in, for example, Japanese Patent Application Laid-Open No. 2012-32029 (see Patent Document 1). The above-mentioned Patent Document 1 discloses a space forming member as a conduit cover. An electric wire insertion hole is provided in the bottom plate of the outer case of the heat source machine. The electric wire is drawn from the outside to the inside of the outer case through the electric wire insertion hole. The space forming member is arranged so as to pull out the electric wire drawn into the outer case forward in the outer case. The space forming member has a cylindrical short tube portion, and is attached to the outer case by inserting the short tube portion into the electric wire insertion hole.

Japanese Unexamined Patent Publication No. 2012-32029

In Patent Document 1, as described above, the short tube portion of the space forming member is inserted into the electric wire insertion hole. Therefore, the passage area of the electric wire insertion hole is reduced by the cross-sectional area of the short pipe portion. Therefore, if the number of electric wires drawn into the outer case is large, the electric wires become cramped in the electric wire insertion holes, and it becomes difficult to construct the electric wires.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric wire cover for a heat source machine and a heat source machine in which electric wires can be easily installed.

One of the electric wire tube covers of the present invention covers the first electric wire drawn from the outside to the inside of the outer case through the first electric wire insertion hole provided in the outer case of the heat source machine. This conduit cover includes a bottom plate and a first support portion. The bottom plate has a first through hole through which the first electric wire is passed, and is arranged inside the outer case. The first support portion extends downward from the bottom plate and is inserted into the first electric wire insertion hole. The first through hole has a first arc portion having a first radius and a second arc portion having a second radius larger than the first radius. The first support portion is connected to the bottom plate along the outer circumference of the first arc portion, and has a first notch portion directly below the second arc portion.

According to one of the electric wire tube covers of the present invention, the first support portion inserted into the first electric wire insertion hole has a first notch portion directly below the second arc portion. Therefore, the first notch provides a space for accommodating the first electric wire. Therefore, the tightness of the electric wire in the first electric wire insertion hole is alleviated, and the construction of the electric wire becomes easy.

Further, the first through hole has a second arc portion having a second radius larger than the first radius of the first arc portion. Due to the second arc portion, a space for accommodating the first electric wire is provided in the first through hole. Therefore, the tightness of the electric wire in the first through hole is alleviated, and the construction of the electric wire becomes easy.

In the above-mentioned one electric conduit cover, the first support portion has an upper end connected to the bottom plate and a lower end facing the upper end. The first notch portion is provided from the upper end to the lower end of the first support portion.

The first notch provides a space for accommodating the first electric wire from the upper end to the lower end of the first support portion. Therefore, the tightness of the electric wire in the first electric wire insertion hole is alleviated, and the construction of the electric wire becomes easier.

In the above-mentioned one electric conduit cover, the bottom plate has a second through hole through which the second electric wire drawn from the outside to the inside of the outer case is passed through the second electric wire insertion hole provided in the outer case. The conduit cover further includes a second support portion that extends downward from the bottom plate and is inserted into the second wire insertion hole. The second through hole has a third arc portion having a third radius and a fourth arc portion having a fourth radius larger than the third radius. The second support portion is connected to the bottom plate along the outer circumference of the third arc portion, and has a second notch portion directly below the fourth arc portion.

By providing the second through hole in the bottom plate in this way, the electric wire can be arranged separately in the first through hole and the second through hole. Therefore, the tightness of the first electric wire in the first through hole and the tightness of the second electric wire in the second through hole are further alleviated, and the construction of the first electric wire and the second electric wire becomes easy.

Further, the second support portion has a second notch portion directly below the fourth arc portion. Therefore, the second notch provides a space in the second support for accommodating the second electric wire. Therefore, the tightness of the second electric wire in the second support portion is alleviated, and the construction of the second electric wire becomes easy.

Further, the second through hole provided in the bottom plate has a fourth arc portion having a fourth radius larger than the third radius of the third arc portion. The fourth arc portion provides a margin in the space for accommodating the second electric wire in the second through hole. Therefore, the tightness of the second electric wire in the second through hole is alleviated, and the construction of the second electric wire becomes easy.

In the above-mentioned one electric conduit cover, the second arc portion is provided at a portion of the first through hole facing the second through hole, and the first support portion is the second arc portion with respect to the center of the first through hole. It is located on the opposite side of. The fourth arc portion is provided at a portion of the second through hole facing the first through hole, and the second support portion is located on the opposite side of the fourth arc portion with respect to the center of the second through hole.

In this way, the first support portion is located on the opposite side of the second arc portion with respect to the center of the first through hole, and the second support portion is on the opposite side of the fourth arc portion with respect to the center of the second through hole. Is located in. Therefore, when the first support portion is inserted into the first electric wire insertion hole and the second support portion is inserted into the 21 electric wire insertion hole, the conduit cover is hard to come off from the outer case.

In the above-mentioned one electric conduit cover, the first support portion has a first wall surface and a second wall surface facing the first wall surface and located on the inner peripheral side of the first wall surface when viewed from the first arc portion. ing. The second wall surface has an inclined portion that is inclined so as to be located on the outer peripheral side of the first arc portion as the distance from the bottom plate increases.

Due to the inclined portion, the inner diameter of the first support portion becomes wider as it approaches the lower end of the first support portion. Therefore, a space for accommodating the first electric wire is provided, the tightness of the first electric wire is alleviated, and the construction of the first electric wire becomes easy.

Further, since the inner diameter of the first support portion becomes wider toward the lower end of the first support portion due to the inclined portion, the first electric wire can be smoothly drawn into the first support portion. This makes it easier to insert the first electric wire into the first support portion.

The other conduit cover of the present invention covers the first electric wire drawn from the outside to the inside of the outer case through the first electric wire insertion hole provided in the outer case of the heat source machine. This conduit cover includes a bottom plate and a first support portion. The bottom plate has a first through hole through which the first electric wire is passed, and is arranged inside the outer case. The first support portion extends downward from the bottom plate and is inserted into the first electric wire insertion hole. The first support portion has a first wall surface and a second wall surface that faces the first wall surface and is located on the inner peripheral side of the first wall surface when viewed from the first through hole. The second wall surface has an inclined portion that is inclined so as to be located on the outer peripheral side of the first through hole as the distance from the bottom plate increases.

According to the other conduit cover of the present invention, the inner diameter of the first support portion becomes wider as it approaches the lower end of the first support portion due to the inclined portion. Therefore, a space for accommodating the first electric wire is provided, the tightness of the first electric wire is alleviated, and the construction of the first electric wire becomes easy.

Further, since the inner diameter of the first support portion becomes wider toward the lower end of the first support portion due to the inclined portion, the first electric wire can be smoothly drawn into the first support portion. This makes it easier to insert the first electric wire into the first support portion.

The heat source machine of the present invention includes any of the above-mentioned conduit covers and an exterior case having a first conduit insertion hole through which a first support portion of the conduit cover is inserted.

According to the heat source machine of the present invention, it is possible to realize a heat source machine in which electric wires can be easily installed.
The heat source machine further includes a wiring joint and a bush member. The wiring joint has a tubular shape and is inserted into the first electric wire insertion hole of the outer case. The wiring joint has a first end portion and a second end portion facing each other. The first support portion of the conduit cover is inserted into the wiring joint from the first end portion. The bush member is inserted into the wiring joint from the second end. The bush member has a movable piece that is displaced toward the first support portion of the conduit cover by inserting the first electric wire.

As described above, according to the present invention, it is possible to realize a conduit cover and a heat source machine in which electric wires can be easily installed.

It is a front view which shows the structure of the heat source machine in one Embodiment of this invention. It is an exploded perspective view which shows the structure of the conduit cover, the wiring joint, the bush member and the like used for the heat source machine of FIG. It is a perspective view which shows the structure of the electric wire tube cover used for the heat source machine of FIG. 1 from the rear upper part. It is a perspective view which shows the structure of the electric wire tube cover used for the heat source machine of FIG. 1 from the front lower part. It is a bottom view which shows the structure of the electric wire tube cover used for the heat source machine of FIG. It is sectional drawing along the VI-VI line of FIG. 5 which shows the structure of the conduit cover used for the heat source machine of FIG. It is sectional drawing of the conduit cover and the wiring joint of the comparative example 1. FIG. It is sectional drawing of the electric wire tube cover and the wiring joint used for the heat source machine of FIG. It is sectional drawing which shows the state which the movable piece of the bush member was displaced in the electric wire tube cover of the comparative example 2. FIG. It is sectional drawing which shows the state which the movable piece of a bush member is displaced in the electric wire tube cover used for the heat source machine of FIG. It is a figure (A)-(D) which shows the modification of the electric wire tube cover.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In addition, in the specification and the drawing, the same component or the corresponding component is designated by the same reference numeral, and duplicate description will not be repeated. Further, in the drawings, the configuration may be omitted or simplified for convenience of explanation. Further, at least a part of each embodiment and each modification may be arbitrarily combined with each other.

<Structure of heat source machine>
First, the configuration of the hot water supply device will be described with reference to FIGS. 1 and 2 as an example of the heat source machine according to the embodiment of the present invention.

However, the heat source machine is not limited to the hot water supply device, and may be, for example, a hot water device, a heating device, a bath hot water supply device with hot water heating, or the like. Further, the heat source machine may be a method of burning fuel gas or a method of burning petroleum. Further, the heat source machine may be a hot water storage type or an instantaneous type.

As shown in FIG. 1, the hot water supply device 10 includes a conduit cover 1, a wiring joint 2, a bush member 3, an outer case 11, a blower 12, a combustion device 13, a heat exchanger 14, and an exhaust gas. It mainly has a box 15.

A blower 12, a combustion device 13, a heat exchanger 14, and an exhaust box 15 are arranged inside the outer case 11. The blower 12 is for taking in air from the outside of the outer case 11 and supplying it to the combustion device 13. A combustion device 13 is arranged above the blower 12.

The combustion device 13 is for generating a combustion gas as a heating gas by burning a mixed gas of a fuel gas and air. A heat exchanger 14 is arranged above the combustion device 13.

The heat exchanger 14 is for exchanging heat between the combustion gas generated in the combustion device 13 and the water inside the heat exchanger 14. The heat exchanger 14 has, for example, a primary heat exchanger and a secondary heat exchanger. The primary heat exchanger is a sensible heat recovery type heat exchanger for recovering the sensible heat of the combustion gas generated in the combustion device 13. The secondary heat exchanger is a latent heat recovery type heat exchanger for recovering the latent heat of the combustion gas generated in the combustion device 13.

An exhaust box 15 is arranged above the heat exchanger 14. The combustion gas after heat exchange in the heat exchanger 14 is discharged to the outside of the outer case 11 through the exhaust box 15.

The outer case 11 has a top plate 11t, a bottom plate 11b, a pair of side plates 11sa and 11sb, a front plate 11f, and a rear plate (not shown). Each of the top plate 11t, the bottom plate 11b, the pair of side plates 11sa, 11sb, the front plate 11f, and the rear plate constitutes the wall portion of the exterior case 11.

The top plate 11t, the bottom plate 11b, and the pair of side plates 11sa and 11sb are arranged so as to form a frame. The rear plate is a top plate 11t, a bottom plate 11b, and a pair of side plates 11sa, 11sb, respectively, so as to close one end (rear end) of a frame composed of the top plate 11t, the bottom plate 11b, and a pair of side plates 11sa, 11sb. It is connected to the.

The front plate 11f is formed of the top plate 11t, the bottom plate 11b and the pair of side plates 11sa, 11sb so as to close the other end (front end) of the frame composed of the top plate 11t, the bottom plate 11b and the pair of side plates 11sa, 11sb. It is possible to connect to each. The front plate 11f can be attached to and detached from the other end (front end) of the frame composed of the top plate 11t, the bottom plate 11b, and the pair of side plates 11sa and 11sb.

The top plate 11t and the bottom plate 11b face each other. A pair of side plates 11sa and 11sb face each other. The front plate 11f and the rear plate face each other. The space surrounded by the top plate 11t, the bottom plate 11b, the pair of side plates 11sa and 11sb, the front plate 11f, and the rear plate constitutes the internal space of the exterior case 11.

In the present specification, the inside of the outer case 11 means the above-mentioned internal space of the outer case 11. Further, in the present specification, the outside of the exterior case 11 refers to the inside space and the outside of the exterior case 11 separating the top plate 11t, the bottom plate 11b, the pair of side plates 11sa and 11sb, the front plate 11f, and the rear plate. Means the space of.

The heat source machine 10 further includes a control plate 21, a terminal plate 22, and a controller case 23. Inside the outer case 11, a conduit cover 1, a wiring joint 2, a control plate 21, a terminal plate 22, and a controller case 23 are arranged.

The front plate 11f of the outer case 11 is provided with an opening 11fa. The opening 11fa penetrates the front plate 11f. The inside of the outer case 11 communicates with the outside of the outer case 11 via the opening 11fa. The opening 11fa is located in front of the conduit cover 1.

The lid 11fb is removable from the front plate 11f. By attaching the lid 11fb to the front plate 11f, the opening 11fa can be closed.

As shown in FIG. 2, the bottom plate 11b of the outer case 11 is provided with a first electric wire insertion hole 11ba and a second electric wire insertion hole 11bb. Each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb penetrates the bottom plate 11b. The inside of the outer case 11 communicates with the outside of the outer case 11 via each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb. Each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb has, for example, a perfect circular shape in the bottom view.

In the present specification, the bottom view means a viewpoint of viewing the bottom plate 11b from a direction orthogonal to the bottom surface of the bottom plate 11b.

A wiring joint 2 is inserted into each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb. The wiring joint 2 has a tubular portion 2a and a flange portion 2b. The tubular portion 2a and the flange portion 2b are integrally formed of, for example, resin.

The tubular portion 2a has, for example, a cylindrical shape. The tubular portion 2a has a first end portion 2a1 and a second end portion 2a2 facing each other.

The tubular portion 2a has an outer diameter smaller than the diameter of each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb. Therefore, the tubular portion 2a can be inserted into each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb.

The flange portion 2b is connected to the vicinity of the first end portion 2a1 of the tubular portion 2a. The flange portion 2b projects from the outer peripheral surface of the tubular portion 2a toward the outer peripheral side. The flange portion 2b has, for example, an annular shape.

The flange portion 2b has an outer diameter larger than the diameter of each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb. Therefore, the flange portion 2b cannot pass through the inside of each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb.

The tubular portion 2a of the wiring joint 2 is inserted into the first electric wire insertion hole 11ba or the second electric wire insertion hole 11bb from the inside of the outer case 11. Therefore, in a state where the wiring joint 2 is attached to the outer case 11, the second end portion 2a2 of the tubular portion 2a is located outside the outer case 11.

Further, in a state where the wiring joint 2 is attached to the outer case 11, the flange portion 2b of the wiring joint 2 is located inside the outer case 11. The flange portion 2b is in contact with the bottom plate 11b of the outer case 11.

The bush member 3 has a tubular portion 3a, a plurality of movable pieces 3b, and a flange portion 3c. The tubular portion 3a, the plurality of movable pieces 3b, and the flange portion 3c are integrally formed of, for example, rubber.

The tubular portion 3a has, for example, a cylindrical shape. The tubular portion 3a has a first end portion 3a1 and a second end portion 3a2 facing each other. The tubular portion 3a has an outer diameter smaller than the inner diameter of the tubular portion 2a in the wiring joint 2. Therefore, the tubular portion 3a of the bush member 3 can be inserted into the tubular portion 2a of the wiring joint 2.

The plurality of movable pieces 3b are, for example, four movable pieces 3b. Each of the plurality of movable pieces 3b is connected to the first end portion 3a1 of the tubular portion 3a. Each of the plurality of movable pieces 3b extends from the inner peripheral surface of the tubular portion 3a to the inner peripheral side. For example, the four movable pieces 3b are formed by making a cross cut in the membrane that closes the first end portion 3a1 of the tubular portion 3a.

Each of the plurality of movable pieces 3b is configured so that the tip of the movable piece 3b is displaced in the vertical direction. Specifically, the outer peripheral ends of the plurality of movable pieces 3b are connected to the first end portion 3a1 of the tubular portion 3a, and the inner peripheral ends (tips) of the plurality of movable pieces 3b are displaced in the vertical direction.

The flange portion 3c is connected to the second end portion 2a2 of the tubular portion 3a. The flange portion 3c projects from the outer peripheral surface of the tubular portion 3a toward the outer peripheral side. The flange portion 3c has, for example, an annular shape.

The flange portion 3c has an outer diameter larger than the inner diameter of the tubular portion 2a in the wiring joint 2. Therefore, the flange portion 2b cannot pass through the inside of the tubular portion 2a in the wiring joint 2.

The bush member 3 is inserted into the tubular portion 2a of the bush member 3 from the second end portion 2a2 of the wiring joint 2. The tubular portion 3a and the movable piece 3b of the bush member 3 are located in the tubular portion 2a of the wiring joint 2 in a state where the bush member 3 is inserted into the tubular portion 2a of the wiring joint 2. The flange portion 3c of the bush member 3 is located outside the tubular portion 2a of the wiring joint 2 in a state where the bush member 3 is inserted into the tubular portion 2a of the wiring joint 2. In this state, the flange portion 3c is in contact with the second end portion 2a2 of the tubular portion 2a of the wiring joint 2.

The conduit cover 1 covers the electric wires (first electric wire 31, second electric wire 32: FIG. 1) drawn from the outside to the inside of the outer case 11 through each of the first electric wire insertion hole 11ba and the second electric wire insertion hole 11bb. It is for doing.

Each of the first support portion 1a and the second support portion 1b of the conduit cover 1 is inserted into the tubular portion 2a from the first end portion 2a1 of the tubular portion 2a in the wiring joint 2. As a result, the conduit cover 1 is attached to the heat source machine 10.

<Condition of conduit cover>
Next, the configuration of the conduit cover 1 used in the hot water supply device 10 in the present embodiment will be described with reference to FIGS. 2 to 6.

As shown in FIG. 2, the conduit cover 1 mainly has a first support portion 1a, a second support portion 1b, a bottom plate 1c, an electric wire cover portion 1d, and an electric wire locking portion 1f. There is. The first support portion 1a, the second support portion 1b, the bottom plate 1c, the electric wire cover portion 1d, and the electric wire locking portion 1f are integrally formed of, for example, resin.

The bottom plate 1c of the conduit cover 1 is arranged inside the outer case 11. The bottom plate 1c is provided with a first through hole 1ca and a second through hole 1cc. Each of the first through hole 1ca and the second through hole 1cc penetrates the bottom plate 1c. The first through hole 1ca is for inserting, for example, the first electric wire 31 (FIG. 1). The second through hole 1cc is for inserting, for example, the second electric wire 32 (FIG. 1).

Each of the first support portion 1a and the second support portion 1b extends downward from the bottom plate 1c. Each of the first support portion 1a and the second support portion 1b has, for example, a cylindrical shape. The first support portion 1a has a first notch portion CR1 (FIG. 5). The second support portion 1b has a second notch portion CR2 (FIG. 5).

The electric wire cover portion 1d is for covering the first electric wire 31 and the second electric wire 32 drawn into the outer case 11 and pulling them forward. The electric wire cover portion 1d is connected to the bottom plate 1c. The electric wire cover portion 1d covers the upper part of the bottom plate 1c. In particular, the electric wire cover portion 1d covers directly above each of the first through hole 1ca and the second through hole 1cc.

As shown in FIG. 3, the electric wire locking portion 1f is for locking the electric wire between the electric wire locking portion 1f and the electric wire cover portion 1d. The electric wire locking portion 1f is arranged behind the electric wire cover portion 1d. For example, the lower end of the electric wire locking portion 1f is connected to the rear surface of the electric wire cover portion 1d. For example, the upper end of the electric wire locking portion 1f is a free end.

As shown in FIG. 4, the first support portion 1a has an upper end 1a1 connected to the bottom plate 1c and a lower end 1a2 facing the upper end 1a1. The first notch CR1 provided in the first support portion 1a is provided from the upper end 1a1 to the lower end 1a2 of the first support portion 1a.

The second support portion 1b has an upper end 1b1 connected to the bottom plate 1c and a lower end 1b2 facing the upper end 1b1. The second notch CR2 provided in the second support portion 1b is provided from the upper end 1b1 to the lower end 1b2 of the second support portion 1b.

As shown in FIG. 5, the first through hole 1ca has a first arc portion CA1, a second arc portion CA2, and two first connecting portions CA3. Each of the first arc portion CA1 and the second arc portion CA2 has an arc shape in a bottom view. The central angle of the first arc portion CA1 is, for example, about 180 °. The central angle of the second arc portion CA2 is smaller than the central angle of the first arc portion CA1, for example, less than 180 °. However, the central angle of the second arc portion CA2 may be 180 °.

Further, the central angle of the second arc portion CA2 may be the same as the central angle of the first arc portion CA1 or may be larger than the central angle of the first arc portion CA1.

Each of the two first connecting portions CA3 connects between the first arc portion CA1 and the second arc portion CA2. Each of the two first connecting portions CA3 has, for example, a linear shape in a bottom view. Each of the two first connecting portions CA3 extends in the tangential direction of, for example, the first arc portion CA1 in the bottom view.

In the bottom view, the center C of the first arc portion CA1 and the center C of the second arc portion CA2 are at the same position. The first arc portion CA1 has a first radius DA. The second arc portion CA2 has a second radius DB. The second radius DB is larger than the first radius DA.

The second radius DB of the second arc portion CA2 is equal to or greater than the radius DE of the outer peripheral surface of the first support portion 1a. The second radius DB of the second arc portion CA2 may be the same as the radius DE of the outer peripheral surface of the first support portion 1a.

The first support portion 1a is connected to the bottom plate 1c along the outer circumference of the first arc portion CA1. The first support portion 1a does not overlap with the first through hole 1ca in the bottom view. The first notch portion CR1 provided in the first support portion 1a is located directly below the second arc portion CA2. Due to the first notch portion CR1, the first support portion 1a has a first end portion 1ab and a second end portion 1ac in the circumferential direction. That is, the region between the first end portion 1ab and the second end portion 1ac where the first support portion 1a is not provided is the first notch portion CR1.

The second through hole 1cc has a third arc portion CB1, a fourth arc portion CB2, and two second connecting portions CB3. Each of the third arc portion CB1 and the fourth arc portion CB2 has an arc shape in the bottom view. The central angle of the third arc portion CB1 is, for example, about 180 °. The central angle of the fourth arc portion CB2 is smaller than the central angle of the third arc portion CB1, for example, less than 180 °. However, the central angle of the fourth arc portion CB2 may be 180 °.

Further, the central angle of the fourth arc portion CB2 may be the same as the central angle of the third arc portion CB1 or may be larger than the central angle of the third arc portion CB1.

Each of the two second connecting portions CB3 connects between the third arc portion CB1 and the fourth arc portion CB2. Each of the two second connecting portions CB3 has, for example, a linear shape in a bottom view. Each of the two second connecting portions CB3 extends in the tangential direction of, for example, the third arc portion CB1 in the bottom view.

In the bottom view, the center C of the third arc portion CB1 and the center C of the fourth arc portion CB2 are at the same position. The third arc portion CB1 has a third radius DC. The fourth arc portion CB2 has a fourth radius DD. The fourth radius DD is larger than the third radius DC.

The fourth radius DD of the fourth arc portion CB2 is equal to or greater than the radius DF of the outer peripheral surface of the second support portion 1b. The fourth radius DD of the fourth arc portion CB2 may be the same as the radius DF of the outer peripheral surface of the second support portion 1b.

The second support portion 1b is connected to the bottom plate 1c along the outer circumference of the third arc portion CB1. The second support portion 1b does not overlap with the second through hole 1cc in the bottom view. The second notch portion CR2 provided in the second support portion 1b is located directly below the fourth arc portion CB2. Due to the second notch portion CR2, the second support portion 1b has a first end portion 1bb and a second end portion 1bc in the circumferential direction. That is, the region between the first end portion 1bb and the second end portion 1bc where the second support portion 1b is not provided is the second notch portion CR2.

The second arc portion CA2 of the first through hole 1ca is provided at a portion facing the second through hole 1cc of the first through hole 1ca in a bottom view. The first arc portion CA1 of the first through hole 1ca is located on the opposite side of the second arc portion CA2 and the second through hole 1cc with respect to the center C of the first through hole 1ca in the bottom view. The first support portion 1a has a portion located on the opposite side of the second arc portion CA2 and the second through hole 1cc with respect to the center C of the first through hole 1ca in the bottom view.

The fourth arc portion CB2 of the second through hole 1 bb is provided at a portion facing the first through hole 1ca of the second through hole 1 bb in the bottom view. The third arc portion CB1 of the second through hole 1cc is located on the opposite side of the fourth arc portion CB2 and the first through hole 1ca with respect to the center C of the second through hole 1cc in the bottom view. The second support portion 1b has a portion located on the opposite side of the fourth arc portion CB2 and the first through hole 1ca with respect to the center C of the second through hole 1cc in the bottom view.

As shown in FIG. 6, the first support portion 1a has an outer peripheral surface (first wall surface) 1sa and an inner peripheral surface (second wall surface) 1sb. The outer peripheral surface 1sa and the inner peripheral surface 1sb face each other. The inner peripheral surface 1sb is located on the inner peripheral side of the outer peripheral surface 1sa when viewed from the first arc portion CA1 (FIG. 5).

The inner peripheral surface 1sb constitutes a surface continuous with the peripheral wall surface of the first through hole 1ca provided in the bottom plate 1c. The inner peripheral surface 1sb has an inclined portion 1aa. The inclined portion 1aa is inclined so as to be located on the outer peripheral side of the first arc portion CA1 as the distance from the bottom plate 1c increases. The inclined portion 1aa reaches the lower end 1a2 of the first support portion 1a.

The inclined portion 1aa does not reach the upper end 1a1 from the lower end 1a2. However, the inclined portion 1aa may reach the upper end 1a1. That is, the inclined portion 1aa may be arranged on the entire inner peripheral surface of the first support portion 1a in the vertical direction from the upper end 1a1 to the lower end 1a2 of the first support portion 1a.

Further, the inclined portion 1aa is arranged over the entire circumference of the first support portion 1a in the circumferential direction as shown in FIG. However, the inclined portion 1aa may be arranged only in a part of the first support portion 1a in the circumferential direction.

Further, the inner peripheral surface of the second support portion 1b may also have an inclined portion 1ba similar to the inclined portion 1aa described above.

<Route of 1st and 2nd wires>
Next, the routing of the first electric wire 31 and the second electric wire 32 in the heat source machine according to the present embodiment will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the first electric wire 31 is drawn from the outside to the inside of the outer case 11 through the first electric wire insertion hole 11ba (FIG. 2). Specifically, it is drawn into the outer case 11 through the inside of the tubular portion 3a of the bush member 3, the tubular portion 2a of the wiring joint 2, and the first support portion 1a of the conduit cover 1. The first electric wire 31 may be one electric wire or a plurality of electric wires.

The second electric wire 32 is drawn from the outside to the inside of the outer case 11 through the second electric wire insertion hole 11bb (FIG. 2). Specifically, it is drawn into the outer case 11 through the inside of the tubular portion 3a of the bush member 3, the tubular portion 2a of the wiring joint 2, and the second support portion 1b of the conduit cover 1. The second electric wire 32 may be one electric wire or a plurality of electric wires.

As shown in FIG. 2, each of the first electric wire 31 and the second electric wire 32 drawn into the outer case 11 is guided to the electric wire cover portion 1d of the conduit cover 1 in front of the outer case 11. Pulled out to. As a result, each of the first electric wire 31 and the second electric wire 32 drawn forward can be easily routed in the outer case 11 through the opening 11fa of the front plate 11f shown in FIG.

As shown in FIG. 1, each of the first electric wire 31 and the second electric wire 32 is connected to, for example, a terminal of the control board 21. Further, each of the first electric wire 31 and the second electric wire 32 may be connected to the terminal of the terminal plate 22.

<Effect of this embodiment>
Next, the effects of the present embodiment will be described in comparison with Comparative Example 1 shown in FIG. 7 and Comparative Example 2 shown in FIG.

As shown in FIG. 7, in Comparative Example 1, the notch is not provided in the first support portion 1a of the conduit cover 1. Further, in Comparative Example 1, the inner peripheral shape of the first support portion 1a and the first through hole 1ca provided in the bottom plate 1c have a perfect circular shape in the bottom view. In Comparative Example 1, the area of the region through which the first electric wire 31 is passed in the first support portion 1a is only the area of a perfect circle in the bottom view.

On the other hand, according to the present embodiment, as shown in FIG. 8, the first support portion 1a has a first notch portion CR1 (a region surrounded by a broken line) directly below the second arc portion CA2. There is. Therefore, the first notch portion CR1 provides a space in the first support portion 1a for accommodating the first electric wire 31. Therefore, the tightness of the first electric wire 31 in the first support portion 1a is alleviated, and the construction of the first electric wire 31 becomes easy.

Further, as shown in FIG. 8, the first through hole 1ca provided in the bottom plate 1c has a second arc portion CA2 having a second radius DB larger than the first radius DA of the first arc portion CA1. .. Due to the second arc portion CA2, a space for accommodating the first electric wire 31 is provided in the first through hole 1ca. Therefore, the tightness of the first electric wire 31 in the first through hole 1ca is alleviated, and the construction of the first electric wire 31 becomes easy.

Further, according to the present embodiment, as shown in FIG. 4, the first notch portion CR1 provided in the first support portion 1a is provided from the upper end 1a1 to the lower end 1a2 of the first support portion 1a. There is. The first cutout portion CR1 provides a space for accommodating the first electric wire 31 from the upper end 1a1 to the lower end 1a2 of the first support portion 1a. Therefore, the tightness of the first electric wire 31 in the first support portion 1a is alleviated, and the construction of the first electric wire 31 becomes easier.

Further, according to the present embodiment, as shown in FIG. 2, the bottom plate 1c has a second through hole 1cc through which the second electric wire 32 (FIG. 1) is passed. The second through hole 1cc has a third arc portion CB1 having a third radius DC and a fourth arc portion CB2 having a fourth radius DD larger than the third radius DC as shown in FIG. There is. The second support portion 1b is connected to the bottom plate 1c along the outer circumference of the third arc portion CB1 and has a second notch portion CR2 directly below the fourth arc portion CB2.

By providing the second through hole 1cc in the bottom plate 1c in this way, the electric wire can be arranged separately in the first through hole 1ca and the second through hole 1cc. Therefore, the tightness of the first electric wire 31 in the first through hole 1ca and the crampedness of the second electric wire 32 in the second through hole 1cc are alleviated, and the construction of the first electric wire 31 and the second electric wire 32 becomes easier. Become.

Further, the second support portion 1b has a second notch portion CR2 (a region surrounded by a broken line) directly below the fourth arc portion CB2. Therefore, the second notch CR2 provides a space in the second support 1b for accommodating the second electric wire 32. Therefore, the tightness of the second electric wire 32 in the second support portion 1b is alleviated, and the construction of the second electric wire 32 becomes easy.

Further, the second through hole 1cc provided in the bottom plate 1c has a fourth arc portion CB2 having a fourth radius DD larger than the third radius DC of the third arc portion CB1. The fourth arc portion CB2 provides a margin in the space for accommodating the second electric wire 32. Therefore, the tightness of the second electric wire 32 in the second through hole 1 kb is alleviated, and the construction of the second electric wire 32 becomes easy.

Further, according to the present embodiment, as shown in FIG. 4, the second notch portion provided in the second support portion 1b is provided from the upper end 1b1 to the lower end 1b2 of the second support portion 1b. .. The second notch provides a space for accommodating the second electric wire 32 from the upper end 1b1 to the lower end 1b2 of the second support portion 1b. Therefore, the tightness of the second electric wire 32 in the second support portion 1b is alleviated, and the construction of the second electric wire 32 becomes easier.

Further, according to the present embodiment, as shown in FIG. 5, the first support portion 1a is located on the opposite side of the second arc portion CA2 with respect to the center C of the first through hole 1ca, and the second support portion 1b is located on the opposite side of the fourth arc portion CB2 with respect to the center C of the second through hole 1cc. Therefore, as shown in FIG. 2, the conduit cover 1 is in a state where the first support portion 1a is inserted through the first electric wire insertion hole 11ba and the second support portion 1b is inserted through the second electric wire insertion hole 11bb. It becomes difficult to come off from the outer case 11.

Further, as shown in FIG. 9, in Comparative Example 2, the inner peripheral surface 1sb of the first support portion 1a does not have an inclined portion. Therefore, the inner peripheral surface 1sb maintains the same inner diameter from the upper end 1a1 to the lower end 1a2 of the first support portion 1a.

In Comparative Example 2, when the first electric wire 31 is inserted into the first support portion 1a, the tip of the movable piece 3b in the bush member 3 is displaced upward until it comes into contact with the inner peripheral surface 1sb of the first support portion 1a. .. As a result, the first electric wire 31 is passed through a narrow space having an open diameter D2 of the movable piece 3b.

On the other hand, according to the present embodiment, as shown in FIG. 6, the inner peripheral surface 1sb of the first support portion 1a has an inclined portion 1aa. The inclined portion 1aa is inclined so as to be located on the outer peripheral side of the first arc portion CA1 (FIG. 5) as the distance from the bottom plate 1c increases.

Therefore, as shown in FIG. 10, when the first electric wire 31 is inserted into the first support portion 1a and the tip of the movable piece 3b in the bush member 3 is displaced, the tip of the movable piece 3b comes into contact with the inclined portion 1aa. As a result, the open diameter D1 of the movable piece 3b becomes larger than the diameter D2 of Comparative Example 2. Therefore, a space for accommodating the first electric wire 31 is provided, the crampedness of the first electric wire 31 is alleviated, and the construction of the first electric wire 31 becomes easy.

Further, in the present embodiment, as shown in FIG. 10, the inner diameter of the first support portion 1a becomes wider toward the lower end 1a2 of the first support portion 1a due to the inclined portion 1aa. Therefore, the first electric wire 31 (FIG. 1) can be smoothly pulled into the first support portion 1a. This makes it easier to insert the first electric wire 31 into the first support portion 1a.

Further, in the present embodiment, as shown in FIG. 1, the controller case 23 is arranged on the conduit cover 1. As described above, the conduit cover 1 may be used for positioning the controller case 23.

<Modification example>
Next, the configuration of the modified example of the above embodiment will be described with reference to FIG.

In the above embodiment, the first notch CR1 of the first support 1a is provided at a portion facing the second support 1b, and the second notch CR2 of the second support 1b is the first support 1a. It is provided in the part facing the. However, the arrangement positions and forms of the first notch portion CR1 and the second notch portion CR2 are not limited to the above.

As shown in FIG. 11A, the first notch CR1 of the first support 1a is provided on the side away from the second support 1b, and the second notch CR2 of the second support 1b is provided. It may be provided on the side away from the first support portion 1a. That is, in the bottom view, the first support portion 1a is located between the first notch portion CR1 and the second support portion 1b, and the second support portion 1b is located between the second notch portion CR2 and the first support portion 1a. May be located.

In this configuration, between the first notch CR1 and the second notch CR2, the center C of the first through hole 1ca, the center C of the second through hole 1cc, the first support 1a and the second support 1b is located.

Also in this configuration, the second arc portion CA2 of the first through hole 1ca is located directly above the first notch CR1, and the fourth arc CB2 of the second through hole 1cc is the true of the second notch CR2. Located on top.

As shown in FIG. 11B, the first support portion 1a and the second support portion 1b may be arranged diagonally in a bottom view. In this configuration, the first support portion 1a and the second support portion 1b are relative to a virtual straight line passing through both the center C of the first through hole 1ca and the center C of the second through hole 1cc in the bottom view. They are located on opposite sides of each other. The first support portion 1a is located on the opposite side of the center C of the first through hole 1ca from the second through hole 1cc. Further, the second support portion 1b is located on the side opposite to the first through hole 1ca with respect to the center C of the second through hole 1cc.

Also in this configuration, the second arc portion CA2 of the first through hole 1ca is located directly above the first notch CR1, and the fourth arc CB2 of the second through hole 1cc is the true of the second notch CR2. Located on top.

As shown in FIG. 11C, the first support portion 1a and the second support portion 1b may be arranged at the four corners in the bottom view. In this configuration, each of the first support portion 1a and the second support portion 1b is divided into two parts.

In the bottom view, the two portions of the first support portion 1a are arranged on opposite sides of a virtual straight line passing through both the center C of the first through hole 1ca and the center C of the second through hole 1cc. .. Both of the two portions of the first support portion 1a are located on the opposite side of the center C of the first through hole 1ca from the second through hole 1cc in the bottom view.

In the bottom view, the two portions of the second support portion 1b are arranged on opposite sides of a virtual straight line passing through both the center C of the first through hole 1ca and the center C of the second through hole 1cc. .. Both of the two portions of the second support portion 1b are located on the opposite side of the center C of the second through hole 1cc from the first through hole 1ca in the bottom view.

In this configuration, the two portions of the first support portion 1a are arranged along the outer circumferences of the two first arc portions CA1a and CA1b, respectively. Further, the two portions of the second support portion 1b are arranged along the outer circumferences of the two third arc portions CB1a and CB1b, respectively.

The second arc portions CA2a and CA2b of the first through hole 1ca are located directly above the first notch portions CR1a and CR1b, respectively, and the fourth arc portions CB2a and CB2b of the second through hole 1cc are the second notch portions, respectively. It is located directly above CR2a and CR2b.

As shown in FIG. 11 (D), the first support portion 1a and the second support portion 1b face each other with the center C of both the first through hole 1ca and the second through hole 1cc in the bottom view. It may be arranged. The central angle of each of the first support portion 1a and the second support portion 1b in the bottom view is less than 90 °.

In this configuration, the second arc portion CA2 of the first through hole 1ca is located directly above the first notch CR1, and the fourth arc CB2 of the second through hole 1cc is the true of the second notch CR2. Located on top.

The radii DA to DF shown in FIGS. 11A to 11D have the same relationship as the radii DA to DF shown in FIG.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Conduit cover, 1a 1st support, 1a1,1b1 upper end, 1a2, 1b2 lower end, 1aa, 1ba inclined part, 1ab, 1bb, 2a1,3a1 1st end part, 1b 2nd support part, 1ac, 1bc, 2a2 , 3a2 2nd end, 1c, 11b bottom plate, 1ca 1st through hole, 1cc 2nd through hole, 1d wire cover part, 1f wire locking part, 1sa outer peripheral surface, 1sb inner peripheral surface, 2 wiring joint, 2a, 3a Cylindrical part, 2b, 3c Flange part, 3 Bush member, 3b Movable piece, 10 Heat source machine (hot water supply device), 11 Exterior case, 11ba 1st wire insertion hole, 11bb 2nd wire insertion hole, 11f front plate, 11fa Opening, 11fb lid, 11sa side plate, 11t top plate, 12 blower, 13 combustion device, 14 heat exchanger, 15 exhaust box, 21 control plate, 22 terminal plate, 23 controller case, 31 first wire, 32 second wire, C center, CA1, CA1a, CA1b 1st arc part, CA2, CA2a, CA2b 2nd arc part, CA3 1st connection part, CB1, CB1a, CB1b 3rd arc part, CB2, CB2a, CB2b 4th arc part, CB3 2nd connection part, CR1, CR1a, CR1b 1st notch part, CR2, CR2a, CR2b 2nd notch part.

Claims (8)

A conduit cover that covers the first electric wire drawn from the outside to the inside of the outer case through the first electric wire insertion hole provided in the outer case of the heat source machine.
A bottom plate having a first through hole through which the first electric wire is passed and arranged inside the outer case,
A first support portion extending downward from the bottom plate and being inserted into the first electric wire insertion hole is provided.
The first through hole has a first arc portion having a first radius and a second arc portion having a second radius larger than the first radius.
The first support portion is connected to the bottom plate along the outer circumference of the first arc portion, and has a first notch portion directly below the second arc portion. The first support portion has an upper end connected to the bottom plate and a lower end facing the upper end.
The electric wire tube cover according to claim 1, wherein the first notch portion is provided from the upper end to the lower end of the first support portion. The bottom plate has a second through hole for passing a second electric wire drawn from the outside to the inside of the outer case through a second electric wire insertion hole provided in the outer case.
A second support portion extending downward from the bottom plate and being inserted into the second electric wire insertion hole is further provided.
The second through hole has a third arc portion having a third radius and a fourth arc portion having a fourth radius larger than the third radius.
The electric wire according to claim 1 or 2, wherein the second support portion is connected to the bottom plate along the outer circumference of the third arc portion and has a second notch portion directly below the fourth arc portion. Tube cover. The second arc portion is provided at a portion of the first through hole facing the second through hole, and the first support portion is on the opposite side of the second arc portion with respect to the center of the first through hole. Located in
The fourth arc portion is provided at a portion of the second through hole facing the first through hole, and the second support portion is on the opposite side of the fourth arc portion with respect to the center of the second through hole. The conduit cover according to claim 3, which is located in. The first support portion
The first wall and
It has a second wall surface facing the first wall surface and located on the inner peripheral side of the first wall surface when viewed from the first arc portion.
The electric wire tube cover according to any one of claims 1 to 4, wherein the second wall surface has an inclined portion that inclines so as to be located on the outer peripheral side of the first arc portion as the distance from the bottom plate increases. .. A conduit cover that covers the first electric wire drawn from the outside to the inside of the outer case through the first electric wire insertion hole provided in the outer case of the heat source machine.
A bottom plate having a first through hole through which the first electric wire is passed and arranged inside the outer case,
A first support portion extending downward from the bottom plate and being inserted into the first electric wire insertion hole is provided.
The first support portion
The first wall and
It has a second wall surface facing the first wall surface and located on the inner peripheral side of the first wall surface when viewed from the first through hole.
The second wall surface is a conduit cover having an inclined portion that inclines so as to be located on the outer peripheral side of the first through hole as the distance from the bottom plate increases. The electric wire tube cover according to any one of claims 1 to 6.
A heat source machine including an outer case having a first electric wire insertion hole through which the first support portion of the electric wire tube cover is inserted. It has a tubular shape and is further provided with a wiring joint inserted into the first electric wire insertion hole of the outer case.
The wiring joint has a first end and a second end facing each other.
The first support portion of the conduit cover is inserted into the inside of the wiring joint from the first end portion.
A bush member inserted into the wiring joint from the second end is further provided.
The heat source machine according to claim 7, wherein the bush member has a movable piece that is displaced toward the first support portion of the conduit cover by inserting the first electric wire.

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