CN115013975A

CN115013975A - Heat source device

Info

Publication number: CN115013975A
Application number: CN202210057964.4A
Authority: CN
Inventors: 林金丽
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 2021-03-05
Filing date: 2022-01-19
Publication date: 2022-09-06
Also published as: JP2022135810A

Abstract

The invention provides a heat source device. In the heat source device, a setting operation portion connected to an internal member in a main body outer box is exposed through a hole portion of a lid body, and the internal member and the setting operation portion are connected by a structure in which a male screw is screwed into a female screw hole formed in the internal member, or a structure in which a nut is screwed onto a male screw provided upright on the internal member. The setting operation portion is provided with a through hole through which a threaded shaft of the male screw passes when the setting operation portion is coupled to the internal member, the diameter of the through hole is set to be larger than the diameter of the threaded shaft, a screw feed restriction portion is provided in at least one of the internal member, the male screw, and the nut so that the male screw or the nut is not screwed beyond a predetermined position, and a movable region that allows the setting operation portion to move in the direction of the threaded shaft and in the radial direction of the threaded shaft is provided in the through hole of the setting operation portion in a state where the male screw or the nut is fastened to the screw feed restriction portion.

Description

Heat source device

Technical Field

The present invention relates to a heat source device with a setting operation unit, to which a setting operation unit is attached.

Background

Conventionally, in such a heat source device, for example, in a hot water supply device, a setting operation unit for performing a setting operation of a hot water supply temperature or the like is attached to a combustion basket in a main body of the hot water supply device, and the setting operation unit is exposed from a hole provided in a front plate of the hot water supply device (japanese patent laid-open No. 2005-195246).

However, in the conventional hot water supply device, the setting operation unit is immovably fixed to the combustion basket of the inner member by screws. Therefore, the hole of the front plate is formed to be larger than the outer peripheral diameter of the setting operation portion so that the setting operation portion is inserted into the hole of the front plate by assembling the front plate to the hot water supply apparatus main body to which the setting operation portion is attached. However, due to the accumulation of tolerances in assembling the internal components such as the burner basket, the setting operation part, the front plate, and the like to the hot water supply apparatus main body, the positions of the hole parts of the setting operation part and the front plate cannot be aligned properly, and the setting operation part cannot be inserted into the hole part, so that there are problems such as poor assembling of the front plate, uneven gap between the setting operation part and the hole part over the entire circumference, and poor appearance.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat source device capable of preventing a position shift between a setting operation portion and a hole portion of a cover body such as a front plate, and improving an appearance of the setting operation portion disposed in the hole portion of the cover body.

The heat source device according to the present invention includes: a main body outer box having an open portion, an internal member housed in the main body outer box, a setting operation portion connected to the internal member, and a lid having a hole portion in which the setting operation portion is disposed and closing the open portion of the main body outer box, wherein when the open portion is closed by the lid, a part of the setting operation portion is exposed to the outside of the main body outer box through the hole portion to enable setting operation, and a heat source device having the setting operation portion,

the inner member and the setting operation part are connected by a structure in which a male screw is screwed into a female screw hole formed in the inner member or a structure in which a nut is screwed into a male screw provided upright on the inner member,

the setting operation part is provided with a through hole through which a threaded shaft of the male screw passes when the setting operation part is connected with the internal component, the diameter of the through hole is set to be larger than that of the threaded shaft,

a screw feed restriction portion is provided in at least one of the inner member, the male screw, and the nut so that the male screw or the nut is not screw-fed beyond a predetermined position,

in a state where the male screw or the nut is fastened to the screw feed restricting portion, a movable region that allows the setting operation portion to be movable in the screw axis direction and the screw axis radial direction is provided in the through hole of the setting operation portion.

According to the above configuration, the setting operation portion can be freely moved within the range of the movable region while avoiding the setting operation portion from falling off the internal member. Thus, when the cover is assembled to the opening portion of the main body outer box, the hole portion of the cover and the setting operation portion can be easily aligned. Therefore, by adjusting the position of the setting operation portion so that the setting operation portion is inserted into the hole portion, the cover body can be reliably assembled to the open portion of the main body case. Thus, it is possible to prevent the cover from being improperly assembled to the main body outer box, and to improve the workability of assembling the cover to the main body outer box. Further, the gap between the outer peripheral portion of the setting operation portion and the hole portion of the cover body can be uniformly adjusted over the entire circumference, and the appearance of the setting operation portion disposed in the hole portion of the cover body can be improved.

Further, since the setting operation portion can be moved, even if the size of the hole portion of the lid body is reduced as much as possible, when the lid body is assembled to the open portion of the main body case, the position of the setting operation portion can be adjusted so as to be aligned with the center position of the hole portion of the lid body, and the setting operation portion can be inserted into the hole portion. By reducing the size of the hole of the cover body in this way, the gap between the outer peripheral portion of the setting operation portion and the hole of the cover body can be set small. As a result, the gap between the outer peripheral portion of the setting operation portion and the hole portion of the lid body becomes inconspicuous in appearance, and the appearance of the setting operation portion disposed in the hole portion of the lid body can be further improved.

In the above-described heat source device,

the setting operation part has a flange part extending to the outer periphery,

the configuration can be: in a state where the lid body is assembled to the opening portion of the main body outer box, the flange portion is sandwiched between the main body outer box and the lid body, and the setting operation portion is fixed in position so as not to move.

Thus, the cover is assembled to the main body case, and the setting operation portion is held at the position adjusted with respect to the hole of the cover. Therefore, even if a touch operation or the like is performed on the setting operation unit in the heat source device, the setting operation unit is not displaced and the appearance is not impaired.

In the above-described heat source device,

the inner member and the setting operation portion are coupled to each other by a structure in which a male screw is screwed into a female screw hole formed in the inner member,

the external thread is provided with a head part and a thread shaft connected with the head part,

the screw shaft is provided with a screw portion to be screwed with the female screw hole of the inner member on a distal end side not having the head portion, the screw feed restriction portion having a larger diameter than the screw portion is provided as an incomplete screw portion on a proximal end side provided with the head portion,

the screw feed restriction unit may be configured to: clearances are formed as the movable regions between the head of the external screw and the inner member, and between the outer peripheral portion of the screw feed restriction portion and the inner peripheral portion of the through hole of the setting operation portion.

According to this configuration, a clearance (first clearance) is formed between the outer peripheral portion of the screw feed restriction portion and the inner peripheral portion of the through hole of the setting operation portion, and the setting operation portion is movable in the radial direction of the threaded shaft by the first clearance. Further, a play (second play) is formed between the head of the male screw and the inner member by the screw feed restriction portion, and the through hole of the setting operation portion is not sandwiched between the head of the male screw and the inner member by the second play, so that the setting operation portion is not prevented from moving in the screw axial direction. Therefore, the setting operation portion can be moved in the radial direction of the threaded shaft, and the hole portion of the lid body and the setting operation portion can be aligned. In this way, in the structure in which the setting operation portion and the internal member are coupled by the male screw, the structure in which the hole portion of the lid body and the position of the setting operation portion can be aligned can be easily obtained.

Drawings

Fig. 1 is a front view showing an external appearance of a hot water supply device (heat source device) according to an embodiment.

Fig. 2 is a front view showing a state in which a front plate of a hot water supply device (heat source device) according to an embodiment is removed, in which fig. 2 (a) shows the front plate, and fig. 2 (b) shows a device main body.

Fig. 3 is an enlarged front view showing a part of a setting operation portion mounted on a combustion chamber of an inner member in an enlarged manner.

Fig. 4 is a sectional view showing a state in which the setting operation portion is mounted in the combustion chamber of the inner member.

Fig. 5 is an enlarged sectional view showing an installation portion of the setting operation portion in an enlarged manner.

Fig. 6 is a schematic diagram showing a modification of the mounting structure of the setting operation unit to the internal member.

Description of the symbols

1 Hot water supply device (Heat source device)

2 inner part

3 setting operation part

4 mounting screw

5 fixing plate

6 through hole

7 screw (external thread)

8 spiral feed restriction part

10 outer box of main body

11 open part

12 front panel (cover)

13 hole part

14 peripheral flange

21 blower for supplying and discharging

22 combustion chamber

23 Heat exchanger

24 exhaust chamber

25 screw hole (internal thread hole)

26 bottom plate

27 bending sheet

28 manifold

29 through hole

30 operating part main body

31 operating part

32 display part

33 operating button

51 plane part

52 upper sheet part

53 upper flange part

54 lower part

55 lower flange part

71 head part

72 threaded shaft

73 screw part

L1 first clearance

L2 second clearance

m movable area

P sealing element

S gap

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

The heat source device of the present invention is a heat source device with a setting operation unit in which a setting operation unit for performing various setting operations is attached to a device main body, and in the present embodiment, a hot water supply device is taken as an example of the heat source device. The present invention is not limited to the hot water supply device, and can be applied to various heat source devices such as a heating cooker such as a stove, an air conditioner such as a fan heater, and a clothes dryer.

Fig. 1 and 2 (a) and (b) show front views of the hot water supply device 1 according to the present embodiment. In the present specification, in the front views shown in fig. 1 and 2, the depth direction of the hot water supply device 1 is referred to as the front-rear direction, the direction intersecting the front-rear direction and the lateral direction is referred to as the left-right direction, and the direction intersecting the front-rear direction and the height direction is referred to as the up-down direction.

In the hot water supply apparatus 1 of the embodiment, a supply/discharge blower 21, a combustion chamber 22, a heat exchanger 23, an exhaust chamber 24, and the like are arranged in this order from bottom to top in a main body casing 10. The internal member 2 includes the air blower 21 for supply and exhaust, the combustion chamber 22, the heat exchanger 23, the exhaust chamber 24, and the like, and is housed in the main body casing 10. An open portion 11 is formed in the front surface of the main body casing 10, and a front plate 12 serving as a cover for closing the open portion 11 is attached to the open portion 11. The front plate 12 is attached to an outer peripheral flange 14 of the main body outer case 10 by fastening a plurality of attachment screws 4. The operation of the hot water supply device 1 causes the supply/discharge blower 21 to operate, and causes a burner (not shown) provided in the combustion chamber 22 to burn, thereby heating a medium such as water flowing through a heat transfer pipe (not shown) provided in the heat exchanger 23 by combustion exhaust gas of the burner. The combustion exhaust gas passing through the heat exchanger 23 is discharged from the exhaust chamber 24 to the outside of the apparatus.

A setting operation unit 3 for performing various setting operations is provided on the front surface of the hot water supply device 1. The setting operation portion 3 has a rectangular box shape, and is connected and attached to the combustion chamber 22 as the inner member 2 by a screw 7 (corresponding to an external thread in the present invention). The setting operation unit 3 is connected to a controller (not shown) provided in the main body casing 10 by wiring, and the contents of settings of various setting items such as a hot water supply temperature set by operation of an operation button 33 (see fig. 3) are transmitted to the controller. The front plate 12 is provided with a rectangular hole 13 in which the setting operation unit 3 is disposed corresponding to the position of the setting operation unit 3. The size of the hole 13 is formed slightly larger than the outer diameter of the setting operation portion 3. The setting operation unit 3 is configured to: when the open portion 11 of the main body case 10 is closed by the front plate 12, the front surface portion of the setting operation portion 3 is exposed to the outside of the main body case 10 through the hole portion 13, and the setting operation can be performed.

As shown in fig. 3 and 4, the setting operation unit 3 includes an operation unit main body 30 and a fixing plate 5 attached to a rear surface of the operation unit main body 30 with screws or the like. The operation unit main body 30 is provided with an operation unit 31 in which a display unit 32 and various operation buttons 33 are arranged in a central region of a front surface. The fixed plate 5 has a quadrangular planar portion 51 to be a mounting portion of the operation portion main body 30, an upper piece portion 52 extending rearward and an upper flange portion 53 extending upward from a rear end of the upper piece portion 52 are provided at an upper end of the planar portion 51, and a lower piece portion 54 extending rearward and a lower flange portion 55 extending downward from a rear end of the lower piece portion 54 are provided at a lower end of the planar portion 51.

A through hole 6 in which a screw 7 is disposed is provided in the center of the upper flange portion 53. The setting operation portion 3 is attached to the combustion chamber 22 by screwing a screw 7 into a screw hole 25 (corresponding to a female screw hole in the present invention) provided in the combustion chamber 22 through the through hole 6 of the upper flange portion 53. Specifically, the screw hole 25 of the combustion chamber 22 is provided in a bent piece 27 formed by bending a front end of a bottom plate 26 of the combustion chamber 22 upward. A manifold 28 of the burner is disposed in the front of the combustion chamber 22, and a through hole 29 through which the screw 7 passes is provided in a wall portion of the manifold 28 at a position opposite to the screw hole 25. Further, an airtight seal P is interposed between the manifold 28 and the bending piece 27.

Referring also to fig. 5, the screw 7 for attaching the setting operation portion 3 to the combustion chamber 22 is screwed into the screw hole 25 of the combustion chamber 22 by passing the screw shaft 72 through the through hole 6 of the setting operation portion 3 and the through hole 29 of the manifold 28. In this case, when a load is applied to the screw 7 through the through hole 29 of the manifold 28, the load of the screw 7 can be received and the load on the screw hole 25 of the combustion chamber 22 can be reduced, so that the screw 7 can be prevented from being loosened or removed by deformation or the like of the screw hole 25. The setting operation portion 3 may be attached to the manifold 28 by providing the screw holes 25 in the manifold 28 and screwing the screws 7, or the setting operation portion 3 may be attached by screwing the screws 7 at a position of the combustion chamber 22 where the manifold 28 does not exist, or the setting operation portion 3 may be attached by screwing the screws 7 to the inner member 2 other than the combustion chamber 22. Further, the operation portion main body 30 may be directly attached to the inner member 2 without the fixed plate 5. In this case, the operation portion main body 30 may be provided with a hole corresponding to the through hole 6.

In the embodiment, the screw 7 has a head 71 and a screw shaft 72 connected to the head 71, the screw shaft 72 is provided with a screw portion 73 to be screwed into the screw hole 25 of the combustion chamber 22 on a distal end side not having the head 71, and a screw feed restriction portion 8 having a larger diameter than the screw portion 73 is provided as an incomplete screw portion on a proximal end side where the head 71 is provided.

The screw feed restriction portion 8 prevents the screw 7 from being fed beyond a predetermined position when the screw 7 is screwed into the screw hole 25 of the combustion chamber 22. The diameter of the screw feed restriction portion 8 is set to a size larger than the diameter of the through hole 29 of the manifold 28 and smaller than the diameter of the head 71 of the screw 7. The through hole 6 of the upper flange portion 53 of the setting operation portion 3 has a diameter larger than the diameter of the screw shaft 72 of the screw 7. Specifically, the diameter of the through hole 6 is set to a size larger than the diameter of the screw feed regulating portion 8 of the screw shaft 72 and smaller than the diameter of the head portion 71 of the screw 7. The screw feed restriction portion 8 of the screw 7 is set to have a length in the axial direction longer than the thickness of the upper flange portion 53 provided with the through hole 6.

Therefore, when the threaded shaft 72 of the screw 7 is inserted through the through hole 6 of the upper flange portion 53 of the setting operation portion 3 and the through hole 29 of the manifold 28 and the screwing portion 73 of the threaded shaft 72 is screwed into the threaded hole 25 of the combustion chamber 22, the screw feed restriction portion 8 abuts on the outer peripheral portion of the through hole 29 of the manifold 28 and the screw 7 cannot be further screwed, and the screwing is completed. In the state where the screw 7 is fastened to the screw feeding restriction portion 8 and abuts against the through hole 29, the through hole 6 of the upper flange portion 53 of the setting operation portion 3 is arranged within the range of the length of the screw feeding restriction portion 8. In this state, a movable region m that allows the setting operation portion 3 to move in the screw axis direction and the screw axis radial direction is retained in the through hole 6.

That is, the screw feeding restriction portion 8 forms a first clearance L1 between the outer peripheral portion of the screw feeding restriction portion 8 and the inner peripheral portion of the through hole 6, and this first clearance L1 becomes a movable region m that allows the upper flange portion 53 of the setting operation portion 3 to move in the screw axis radial direction. The setting operation portion 3 is movable in the screw axis radial direction within the range of the first clearance L1. Further, a second clearance L2 is formed between the head 71 of the screw 7 and the manifold 28 (in the embodiment, in accordance with the axial length of the screw feed restriction portion 8), and this second clearance L2 becomes a movable region m that allows the upper flange portion 53 of the setting operation portion 3 to be movable in the screw axial direction. The second clearance L2 allows the through hole 6 of the upper flange portion 53 to be held between the head 71 of the screw 7 and the manifold 28, and prevents the setting operation portion 3 from moving in the screw axial direction.

With the above configuration, the setting operation portion 3 can be freely moved within the range of the movable range m while avoiding the drop-out from the combustion chamber 22. Thus, when the front plate 12 is assembled to the open portion 11 of the main body case 10, the setting operation portion 3 is moved in the vertical, horizontal, and rotational directions when the setting operation portion 3 is viewed from the front in the screw axis radial direction, that is, when the open portion 11 of the main body case 10 is viewed from the front, and the positions of the hole portion 13 of the front plate 12 and the setting operation portion 3 can be easily aligned. In this way, in the structure in which the setting operation portion 3 is coupled to the combustion chamber 22 of the inner member 2 by the screw 7, the structure in which the hole portion 13 of the front plate 12 and the setting operation portion 3 can be aligned can be easily obtained. Therefore, by adjusting the position of the setting operation portion 3 so that the setting operation portion 3 is inserted into the hole portion 13, the front plate 12 can be reliably assembled to the open portion 11 of the main body housing 10. Therefore, it is possible to prevent the assembling failure in which the front panel 12 cannot be assembled to the main body casing 10, and to improve the workability in assembling the front panel 12 to the main body casing 10.

Further, the gap S (see fig. 1 and 4) between the outer peripheral portion of the setting operation portion 3 and the hole portion 13 of the front plate 12 can be uniformly adjusted over the entire circumference, and the appearance of the setting operation portion 3 disposed in the hole portion 13 of the front plate 12 can be improved.

Further, since the setting operation portion 3 can be moved, even if the size of the hole portion 13 of the front plate 12 is reduced as much as possible, when the front plate 12 is assembled to the open portion 11 of the main body casing 10, the position of the setting operation portion 3 can be adjusted so as to be aligned with the center position of the hole portion 13 of the front plate 12, and the setting operation portion 3 can be inserted into the hole portion 13. Therefore, by reducing the size of the hole portion 13 of the front plate 12, the gap S between the outer peripheral portion of the setting operation portion 3 and the hole portion 13 of the front plate 12 can be set small. As a result, the gap S between the outer peripheral portion of the setting operation portion 3 and the hole portion 13 of the front plate 12 is not conspicuous in appearance, and the appearance of the setting operation portion 3 disposed in the hole portion 13 of the front plate 12 can be further improved.

In the present embodiment, a lower flange portion 55 extending downward from the outer periphery is formed at the lower end of the fixed plate 5 of the setting operation portion 3, and the lower flange portion 55 is fixed in position so as to be sandwiched between the main body case 10 and the front plate 12 when the front plate 12 is assembled to the opening portion 11 of the main body case 10, and thus the setting operation portion 3 cannot move. In particular, since the mounting screws 4 (see fig. 3) for mounting the front plate 12 to the main body outer box 10 are provided in the vicinity of the lower flange portion 55, the lower flange portion 55 is relatively firmly sandwiched between the main body outer box 10 and the front plate 12, and the setting operation portion 3 is firmly positioned and fixed. Thus, by assembling the front plate 12 to the main body casing 10, the setting operation portion 3 is positioned in the front-rear direction and is firmly held at a position adjusted in the vertical, horizontal, and rotational directions with respect to the hole portion 13 of the front plate 12. Therefore, even if the setting operation unit 3 attached to the hot water supply apparatus 1 is touched or otherwise operated, the setting operation unit 3 does not shift in position and the appearance is not impaired.

(other embodiments)

In the above-described embodiment, in the mounting structure for mounting the setting operation portion 3 on the inner member 2 (combustion chamber 22), the screw feed restriction portion 8 is provided on the screw shaft 72 of the screw 7, but a structure as in the following modification may be adopted.

(1) As shown in fig. 6 (a), in modification 1, a cylindrical portion 8A is provided in a screw hole 25 of an inner member 2 for screwing a screw 7 so that a hole peripheral edge portion of the screw hole 25 protrudes outward to be a mounting side of a setting operation portion 3, and a screw feeding restriction portion 8 is constituted by the cylindrical portion 8A. An internal thread groove is formed in the inner circumferential surface of the cylindrical portion 8A. On the other hand, the diameter of the through hole 6 of the setting operation portion 3 disposed in the screw hole 25 is set to be larger than the outer peripheral diameter of the cylindrical portion 8A and smaller than the diameter of the head 71 of the screw 7.

In modification 1, when the through hole 6 of the setting operation portion 3 is disposed in the cylindrical portion 8A and the screw 7 including the head 71 and the screw shaft 72 is screwed into the screw hole 25 of the cylindrical portion 8A, the screw cannot be screwed at a position where the head 71 abuts against the distal end of the cylindrical portion 8A, and the screwing is completed. In this state of completion of screwing, a first clearance L1 is formed between the outer peripheral portion of the cylindrical portion 8A and the inner peripheral portion of the through hole 6, the first clearance L1 becomes a movable region m that allows the setting operation portion 3 to move in the screw axis radial direction, and a second clearance L2 is formed between the head 71 of the screw 7 and the inner member 2 (in accordance with the protruding height of the cylindrical portion 8A), and the second clearance L2 becomes a movable region m that allows the setting operation portion 3 to move in the screw axis direction. Therefore, in this modification 1, the setting operation portion 3 can be freely moved within the range of the movable region m even in a state where the setting operation portion 3 is attached to the inner member 2, and the hole portion 13 of the front plate 12 can be easily aligned with the position of the setting operation portion 3.

(2) As shown in fig. 6 (B), in modification 2, a bottomed cylindrical portion 8B is provided in a screw hole 25 of an inner member 2 into which a screw 7 is screwed, the hole peripheral edge portion of the screw hole 25 being recessed inside the inner member 2, and a screw feed restriction portion 8 is constituted by the bottomed cylindrical portion 8B. An internal thread groove is formed in the inner circumferential surface of the cylindrical portion 8B. On the other hand, the diameter of the through hole 6 of the setting operation portion 3 disposed in the screw hole 25 is set to be larger than the diameter of the screw shaft 72 of the screw 7 and smaller than the diameter of the head 71 of the screw 7.

In this modification 2, when the through hole 6 of the setting operation portion 3 is disposed in the screw hole 25 of the bottomed cylindrical portion 8B and the screw 7 composed of the head 71 and the screw shaft 72 is screwed into the screw hole 25 of the bottomed cylindrical portion 8B, the screw cannot be screwed at a position where the tip of the screw shaft 72 abuts against the bottom of the bottomed cylindrical portion 8B, and the screwing is completed. In this state of completion of screwing, a first clearance L1 is formed between the outer peripheral portion of the threaded shaft 72 and the inner peripheral portion of the through hole 6, the first clearance L1 being a movable region m in which the setting operation portion 3 is allowed to move in the threaded shaft radial direction, and a second clearance L2 is formed between the head 71 of the screw 7 and the inner member 2 (corresponding to the length of the portion of the threaded shaft 72 exposed outward from the threaded hole 25 of the bottomed cylindrical portion 8B), the second clearance L2 being a movable region m in which the setting operation portion 3 is allowed to move in the threaded shaft direction. Therefore, in the modification 2, the setting operation unit 3 can be freely moved within the range of the movable range m in a state where the setting operation unit 3 is attached to the inner member 2.

(3) As shown in fig. 6 (C), modification 3 is such that a stud bolt (stud bolt) 9 is inserted into the screw hole 25 of the inner member 2 and is erected, the through hole 6 of the setting operation portion 3 is disposed in the stud bolt 9 and the nut 91 is fastened, a cylindrical portion 8C is provided on the peripheral edge portion of the internal screw hole on the internal screw hole forming surface of the nut 91, and the screw feed restriction portion 8 is constituted by this cylindrical portion 8C. The cylindrical portion 8C may be cylindrical, polygonal cylindrical, or the like. On the other hand, the diameter of the through hole 6 of the setting operation portion 3 disposed in the stud bolt 9 is set to be larger than the outer peripheral diameter of the cylindrical portion 8C and smaller than the maximum outer diameter of the nut 91.

In modification 3, when the through hole 6 of the setting operation portion 3 is disposed in the stud bolt 9 and the nut 91 with the cylindrical portion 8C is screwed into the stud bolt 9, the tip of the cylindrical portion 8C cannot be screwed at a position abutting against the opposing surface of the inner member 2, and the screwing is completed. In the state where the screwing is completed, a first clearance L1 is formed between the outer peripheral portion of the cylindrical portion 8C and the inner peripheral portion of the through hole 6, the first clearance L1 becomes a movable region m that allows the setting operation portion 3 to move in the screw axis radial direction, and a second clearance L2 is formed between the cylindrical portion 8C forming surface of the nut 91 and the inner member 2 (in accordance with the protruding height of the cylindrical portion 8C), and the second clearance L2 becomes a movable region m that allows the setting operation portion 3 to move in the screw axis direction. Therefore, in modification 3, the setting operation unit 3 can be freely moved within the range of the movable range m in a state where the setting operation unit 3 is attached to the inner member 2.

(4) As shown in fig. 6 (D), modification 4 is such that a stud bolt (stud bolt) 9 is inserted into the screw hole 25 of the inner member 2 and is erected, the through hole 6 of the setting operation portion 3 is disposed in the stud bolt 9, the cap nut 92 is fastened, and the screw feed restriction portion 8 is constituted by the closed female screw hole 8D of the cap nut 92. On the other hand, the diameter of the through hole 6 of the setting operation portion 3 disposed in the stud bolt 9 is set to be larger than the diameter of the stud bolt 9 and smaller than the maximum outer diameter of the nut portion of the cap nut 92.

In modification 4, when the through hole 6 of the setting operation portion 3 is disposed in the stud bolt 9 and the cap nut 92 is screwed into the stud bolt 9, the tip of the stud bolt 9 cannot be screwed at a position abutting against the closed bottom of the female screw hole 8D of the cap nut 92, and the screwing is completed. In this state of completion of screwing, a first clearance L1 is formed between the outer peripheral portion of the stud bolt 9 and the inner peripheral portion of the through hole 6, and this first clearance L1 becomes a movable region m that allows the setting operation portion 3 to move in the screw axis radial direction, and a second clearance L2 is formed between the female screw hole 8D forming surface of the cap nut 92 and the inner member 2 (in accordance with the length of the portion of the stud bolt 9 that is exposed outward from the cap nut 92), and this second clearance L2 becomes a movable region m that allows the setting operation portion 3 to move in the screw axis direction. Therefore, in modification 4, the setting operation unit 3 can be freely moved within the range of the movable range m in a state where the setting operation unit 3 is attached to the inner member 2.

The present invention is not limited to the above-described embodiments, and various modifications can be made according to the claims. For example, in

modifications

3 and 4, the stud bolt 9 is screwed into the female screw hole 25 of the inner member 2 and is erected, but instead, a bolt having a male screw shape may be erected on the inner member 2 by welding or the like.

Claims

1. A heat source device is characterized in that,

the disclosed device is provided with: a main body outer box having an open portion, an internal member housed in the main body outer box, a setting operation portion connected to the internal member, and a lid having a hole portion in which the setting operation portion is disposed and closing the open portion of the main body outer box, wherein when the open portion is closed by the lid, a part of the setting operation portion is exposed to the outside of the main body outer box through the hole portion to enable setting operation, and a heat source device having the setting operation portion,

the inner member and the setting operation portion are coupled to each other by a structure in which a male screw is screwed into a female screw hole formed in the inner member or a structure in which a nut is screwed into a male screw provided upright on the inner member,

2. A heat source device according to claim 1,

the setting operation part has a flange part protruding to the outer periphery,

the heat source device is configured to: in a state where the lid is assembled to the open portion of the main body outer box, the flange portion is fixed in position so as to be sandwiched between the main body outer box and the lid and to prevent the setting operation portion from moving.

3. A heat source device according to claim 1 or 2,

the screw shaft is provided with a screw-threaded portion which is screwed with the internal thread hole of the internal member on the front end side without the head portion, the screw feed limiting portion which has a larger diameter than the screw-threaded portion is provided as an incomplete screw portion on the base end side provided with the head portion,

the screw feed restriction unit is configured to: clearances are formed as the movable regions between the head of the external thread and the internal member and between the outer peripheral portion of the screw feed restriction portion and the inner peripheral portion of the through hole of the setting operation portion.