JP6750452B2 - Wiring joint and outer case including the same - Google Patents

Description

The present invention relates to a wiring joint for connecting a hot water supply apparatus and its operating terminal, and an outer case including the wiring joint.

2. Description of the Related Art Conventionally, a hot water supply device is provided with an exterior case for accommodating a built-in device such as a heat exchanger and a burner so as not to be exposed to wind and rain, and for facilitating the assembly of the hot water supply device. The internal wiring extending from the control means of the water heater housed in the outer case and the wiring (remote control cord) of the operation terminal (remote control) installed in the bathroom or kitchen are connected via the wiring joint attached to the outer case. The hot water supply device can be operated by remote control. A plurality of fixing members (screws) are fixed to the wiring joint by screwing so that a plurality of remote controllers can be connected, and the wiring joint is used by being removed by a driver during wiring connection work.

An outer case of a general water heater is formed in a box shape by a back plate for fixing built-in devices, a top plate, a bottom plate, left and right side plates, and a front plate for connecting with an external pipe or the like. A plurality of openings are provided in the bottom plate or the like. When assembling the hot water supply device, the built-in equipment and the like are attached in a state where the back plate, which is a combination of the top plate and the left and right side plates, is placed on the work table or the like with the back plate facing the floor. After that, combine the bottom plate with pipes and wiring joints attached to the back plate and the left and right side plates to connect the internal equipment and pipes, connect the internal wiring to the wiring joint, and finally attach the front plate. ..

The hot water supply device thus assembled is attached to the wall surface of the building with the bottom plate facing toward the floor, and the remote control cord is connected to the wiring joint. The wiring joint is formed in a case shape, is attached to an outer case so that the internal wiring and the like are not exposed, and is openable/closable to facilitate connection work and inspection work.

For example, a cable connecting member corresponding to the wiring joint of Patent Document 1 is attached to the opening of the water heater outer plate, the connection work is performed by tilting the wiring joint, and the inspection work is performed by opening the front plate of the water heater. Is configured. Further, a connection device corresponding to the wiring joint of Patent Document 2 is attached to the bottom surface of the outer case of the heat source device, and is configured to rotate the wiring joint during connection work or inspection work to adjust the posture to facilitate work. Is disclosed.

Japanese Patent No. 4472578 Japanese Patent No. 4324860

However, the wiring joints of Patent Documents 1 and 2 are not configured to open the front plate of the outer case and perform the wiring connection work. In addition, since a spare screw for use when adding the remote control is fixed to the wiring joint by screwing, it is necessary to remove the spare screw using a screwdriver during the addition work, so workability is not good and it was removed. There is a risk of screws falling or being lost. Further, the wiring joint of Patent Document 2 is provided with a rib portion at the front end portion of the wiring joint to secure the strength capable of withstanding a torsional load when the wiring tube for protecting the remote control cord is attached to or detached from the wiring joint. The wiring joint becomes large in the front and rear, and the degree of freedom in the layout design of the built-in equipment housed in the outer case decreases.

An object of the present invention is to provide a wiring joint that can improve workability during wiring connection work and an outer case including the wiring joint.

A first aspect of the present invention is a composite that holds a terminal block provided with a pair of conducting plates, a pair of fixing members for connecting wiring terminals to the pair of conducting plates, and a pair of preliminary fixing members. In a wiring joint including a pair of resin-made fixing member holding portions, each of the pair of fixing member holding portions has a cylindrical wall portion, and the cylindrical wall portion is provided in parallel with an axial direction thereof. It is characterized in that it has a slit that allows the cylindrical wall portion to be elastically deformable, and that the preliminary fixing member can be elastically held on the inner surface .

According to the above configuration, since the pair of preliminary fixing members are held by the elastic force of the cylindrical wall portions of the pair of fixing and holding members, the preliminary fixing member can be prevented from falling off and the preliminary fixing member can be easily pulled out. Therefore, it is not necessary to separately prepare a fixing member, and it is possible to improve workability when additionally connecting a wire to the wiring joint by using a preliminary fixing member provided in the wiring joint.

In a second aspect based on the first aspect, the wiring joint includes a case portion that accommodates the terminal block and the pair of fixing member holding portions, the case portion including a bottom plate portion and an outer edge of the bottom plate portion. A peripheral wall portion that is erected on the terminal portion, the terminal block is disposed at a front end portion on one end side of the case portion, and the pair of fixing member holding portions is a rear end portion on the other end side of the case portion. It is characterized in that it is erected on the bottom plate portion of the portion.

According to the above configuration, since the terminal block is arranged at the front end portion of the case portion, workability when fixing the wiring by the fixing member can be improved. Further, since the fixed holding member is erected on the bottom plate portion at the rear end portion of the case portion, the fixed holding member does not interfere with the wiring connection work, and there is no fear of lowering workability.

In a third aspect based on the first or second aspect, the wirings connected to the pair of conductive plates are respectively held between the rear end side wall portion of the peripheral wall portion and the pair of fixing member holding portions. It is characterized by being possible.

According to the above configuration, it is possible to suppress the movement of the wirings connected to the pair of conductive plates, so that it is possible to suppress problems such as disconnection and improve workability when connecting the wirings to the conductive plates by the fixing member. You can

A fourth invention is an exterior case including the wiring joint of the second or third invention, wherein the wiring joint extends in an arc shape upward and rearward from the left and right side wall portions of the peripheral wall portion and has a distal end portion. It has a pair of left and right arcuate arm portions provided with engaging portions, and a supporting shaft portion concentric with the axial center of the arcuate arm portion at the rear end portion of the peripheral wall portion, and the bottom plate portion The terminal block includes a partition wall portion that is located between the pair of conducting plates, and a front end portion of the partition wall portion is a front end portion of the peripheral wall portion. Projecting forward from the side wall portion, the exterior case has an opening, an engaging portion for engaging the support shaft portion is provided at a rear end portion of the opening portion, and the partition wall portion is provided at a front end portion of the opening portion. The front end portion has a notch that can be engaged, and the wiring joint is rotatably attached to the opening through the engaging portion and the support shaft portion.

According to the above configuration, the wiring joint is attached to the opening of the outer case so as to be rotatable about the support shaft portion of the wiring joint. It is possible to improve workability when connecting.

In a fifth aspect based on the fourth aspect, the opening has a pair of left and right standing wall portions provided upright on the left and right peripheral portions thereof, and the opening is closed by the wiring joint. In addition, the pair of left and right standing wall portions are close to or in contact with the peripheral wall portion.

According to the above configuration, when the opening of the outer case is closed by the wiring joint, even if a twisting load acts on the wiring joint to attach and detach the wiring pipe to the connecting portion of the wiring joint, the opening A pair of left and right standing walls and the peripheral wall provided in the abutment abut, the notch of the opening front end and the front end of the partition wall engage, and the opening and the base end of the arcuate arm contact. Since they are in contact with each other, the torsional load can be dispersed and received by these parts, and the wiring joint can be prevented from falling off or being damaged. Also, since the wiring joint can be made smaller in the front and rear, the degree of freedom in the layout design of the built-in equipment is improved, and the terminal block can be placed closer to the front end of the outer case, so the front plate can be opened and wiring The workability when connecting is improved.

A sixth invention is characterized in that, in the fourth or fifth invention, the outer case is an outer case of the water heater, and the wiring inserted through the connecting portion is a remote control cord.

According to the above configuration, since the remote controller for operating the water heater and the water heater can be connected via the wiring joint mounted on the outer case of the water heater, the workability when connecting the remote control cord can be improved. ..

ADVANTAGE OF THE INVENTION According to this invention, the wiring joint which can improve workability|operativity at the time of wiring connection work, and the exterior case provided with this can be provided.

It is a perspective view of a wiring joint concerning an example of the present invention. It is the perspective view which looked at the wiring joint of FIG. 1 from the opposite direction. It is a perspective view of the exterior case which concerns on the Example of this invention. It is a principal part perspective view in the state where the wiring joint was attached to the bottom plate of an exterior case. FIG. 5 is a sectional view taken along line V-V of FIG. 4. It is a principal part perspective view of the state which the wiring joint of FIG. 4 rotated. FIG. 7 is a sectional view taken along line VII-VII of FIG. 6.

Hereinafter, modes for carrying out the present invention will be described based on Examples. The arrow U in the figure indicates the upper side, the arrow F indicates the front side, and the arrow L indicates the left side.

First, the wiring joint 1 will be described with reference to FIGS. 1 and 2.
The wiring joint 1 is made of an electrically insulating synthetic resin and is inserted into the pair of left and right conducting plates 2 and 3 and the pair of left and right conducting plates 2 and 3 and the terminal block 4 to conduct electricity. Screws 5a and 5b which are a pair of fixing members for connecting the wiring terminals to the plates 2 and 3, a pair of left and right fixing member holding portions 6 and 7, a terminal block 4 and a pair of fixing member holding portions 6 , 7 is provided. The case portion 8 has a bottom plate portion 9 and a peripheral wall portion 10 provided upright on an outer edge portion thereof, the terminal block 4 is arranged at a front end portion on one end side of the case portion 8, and a rear end portion on the other end side of the case portion 8 A pair of left and right fixing member holding portions 6 and 7 are erected on the bottom plate portion 9.

Each of the pair of left and right fixing member holding portions 6 and 7 has a cylindrical wall portion formed in a cylindrical shape, and slits 6a and 7a are formed in the cylindrical wall portions in parallel with the axial direction thereof. It is provided. For example, the right fixing member holding portion 6 is provided with slits 6a and the like at two positions which are opposed to each other in the front and rear of the cylindrical wall portion, and the distal end side portion of the cylindrical wall portion is elastically deformed left and right by these slits 6a. It is possible, and the same applies to the left fixing member holding portion 7. The elastic force of the cylindrical wall portion is used to hold the screws 11a and 11b, which are preliminary fixing members, on the inner surfaces of the fixing member holding portions 6 and 7. The number of slits provided in the cylindrical wall may be one or three or more.

The terminal block 4 is provided so as to incline forward and extend upward from the bottom plate portion 9 of the case portion 8, and has a pair of left and right conduction plates 2 and 3 at its front upward tip portion. The pair of left and right conducting plates 2, 3 are insulated from the outside by the front end side wall portion 10a provided on the peripheral wall portion 10 at the front and left and right outer sides thereof. A partition wall portion 4a that insulates the conductive plates 2 and 3 is provided between them, and the front end portion of the partition wall portion 4a projects forward from the front end side wall portion 10a.

The conducting plates 2 and 3 have two screw insertion holes such as the screw insertion holes 2a and 3a, and the screws 5a and 5b are inserted into the insertion holes on the side of the partition wall 4a. Although the screws 5a and 5b are tapping screws, they may be formed of other fastening members. Although not shown, the pair of left and right conducting plates 2 and 3 are provided with a side plate portion extending toward the bottom plate portion 9 of the case portion 8 at one end portion thereof, and the side plate portion has internal wiring to be described later. 30, 31 are connected.

The peripheral wall portion 10 has a pair of left and right arcuate arm portions 10b, 10c extending in an arcuate shape upward and rearward from the left and right side wall portions, respectively. The arcuate arm portions 10b and 10c are provided with engaging portions 10d and 10e at their tip portions, respectively. At the rear end of the peripheral wall portion 10, there are provided a spindle portion 10f formed concentrically with the axis of the arcuate arm portions 10b and 10c, and a wire holding portion 10g.

The bottom plate portion 9 is formed with a connecting portion 9a extending in a cylindrical shape below and capable of connecting a wiring pipe (not shown) for inserting the wiring and protecting the wiring. The wiring pipe is detachably connected to the connecting portion 9a by screwing.

Further, a support portion 12a is provided which protrudes forward from the lower portion on the front end side of the peripheral wall portion 10 and extends left and right, and a pair of left and right elastic wall portions 12b, 12c extending upward from both left and right ends of the support portion 12a are provided. The elastic wall portions 12b and 12c respectively have engaging portions 12d and 12e at their tip portions. In this way, the wiring joint is formed to be smaller in the front and rear than in Patent Document 2.

Next, the outer case 20 will be described.
As shown in FIG. 3, the outer case 20 is formed in a box shape, and each has a rectangular back plate 21, a top plate 22, a right side plate 23, a left side plate 24, a bottom plate 25, and a rectangular shape although not shown. It has a front plate. The bottom plate 25 is provided with a plurality of openings for inserting pipes and the like, and the wiring joint 1 can be mounted from below the bottom plate 25 in the openings 26 for wiring.

At the rear end of the opening 26, an engaging portion 26a that engages with the support shaft 10f provided at the rear end of the peripheral wall 10 of the wiring joint 1 is formed. The front end of the opening 26 is formed with a notch 26b with which the front end of the partition wall 4a can be engaged. A pair of left and right standing walls 26c and 26d are provided upright on the left and right peripheral portions of the opening 26 so as to extend upward. Further, the exterior case 20 is provided with a wall mounting metal fitting 20a for mounting on a wall surface of a building and the like.

Next, the operation and effect of the present invention will be described.
As shown in FIGS. 4 and 5, the supporting shaft portion 10f of the wiring joint 1 and the engaging portion 26a of the opening 26 are engaged with each other, and the pair of left and right elastic wall portions 12b and 12c are engaged with the engaging portion 12d. The wiring joint 1 is mounted so that 12e is engaged with the engagement holes 25a and 25b provided in the bottom plate 25 to close the opening 26. The pair of left and right arcuate arm portions 10b and 10c project from the opening 26 to the inside of the outer case 20. In this state, a pair of right and left standing walls 26c and 26d provided in the opening 26 come close to or abut the peripheral wall 10, and the notch 26b at the front end of the opening and the front end of the partition wall 4a are engaged. Then, the outer edge portion of the opening portion 26 and the base end portions of the arcuate arm portions 10b and 10c contact each other.

As shown in FIG. 6 and FIG. 7, the wiring joint 1 mounted in the opening 26 includes a pair of left and right elastic walls 12b and 12c, and engaging portions 12d and 12e at the tips and engagement holes 25a and 25b. In other words, it can be rotated via the engaging portion 26a of the opening 26 and the support shaft portion 10f of the wiring joint 1. When the wiring joint 1 is rotated about 90 degrees, the pair of left and right arcuate arm portions 10b, 10c engages with the engaging portions 10d, 10e at the left and right peripheral portions of the opening 26, and the posture of the wiring joint 1 is changed. Maintained.

As shown in FIGS. 4 to 7, a pair of internal wirings 30 and 31 extending from the control means (not shown) of the water heater housed in the outer case 20 is provided on the left and right sides of the wiring joint 1 attached to the opening 26. The side plates of the pair of conductive plates 2 and 3 are respectively connected. The pair of internal wirings 30 and 31 are provided between the wiring holding portion 10g provided at the rear end portion of the peripheral wall portion 10 and between the rear end side wall portion of the peripheral wall portion 10 and the pair of left and right fixing member holding portions 6 and 7. Since they are held respectively, their movements are restricted, and problems such as disconnection can be suppressed. In addition, it is possible to secure a space for connecting the remote control cords 32, 33 and the like and improve workability.

A water heater having an outer case 20 to which the wiring joint 1 is attached is attached to a wall surface of a building or the like via a wall mounting metal fitting 20a or the like. After that, remote control cords 32 and 33 of a remote controller (not shown) for operating the water heater are inserted into the connecting portions 9a of the bottom plate portion 9 and connected to the conducting plates 2 and 3 of the wiring joint 1, respectively. The remote control cords 32, 33 can be connected by opening the front plate of the outer case 20 with the wiring joint 1 closed, and by rotating the wiring joint 1 according to the work environment. Can also

When connecting the remote control cords 32 and 33 with the wiring joint 1 closed, the wiring joint 1 is formed small in the front and rear, and the terminal block 4 is arranged at the front end portion of the case portion 8 of the wiring joint 1. The degree of freedom in layout design is improved, and since the connection work can be performed at a position near the front end of the outer case 20, workability is improved. Even when the remote control cords 32 and 33 are connected in the open state, the workability of the connection work is good. Although the tip ends of the remote control cords 32 and 33 are Y-shaped terminals, they may be fixed to the conductive plates 2 and 3 with screws 5a and 5b, and other terminals such as round terminals can be used.

The remote control cords 32 and 33 may be inserted into a wiring pipe (not shown), and the wiring pipe may be detachably connected to the connecting portion 9a of the wiring joint 1 with the wiring joint 1 closed. At this time, a twisting load acts on the wiring joint 1, but the pair of left and right upright walls 26c and 26d provided in the opening 26 and the peripheral wall 10 are in contact with each other, and the notch at the front end of the opening 26 is formed. 26b and the front end portion of the partition wall portion 4a are engaged with each other, and the opening portion 26 and the base end portions of the arcuate arm portions 10b and 10c are brought into contact with each other, whereby the torsional load can be dispersed and received at these portions. As a result, the wiring joint 1 can be prevented from falling off or being damaged.

When a remote controller is added and a remote control cord (not shown) is additionally connected to the wiring joint 1, the spare screws 11a and 11b held by the fixing member holding portions 6 and 7 are pulled out, and a pair of left and right conducting plates 2 are provided. , 3 are inserted into the vacant screw insertion holes 2a, 3a to be connected. Although the screws 11a and 11b are tapping screws, they may be composed of other fastening members.

Since the pair of spare screws 11a and 11b are held by the elastic force of the cylindrical wall portion on the pair of left and right fixing member holding portions 6 and 7 of the wiring joint 1, it is possible to prevent the screws 11a and 11b from falling off and to secure the driver. The screws 11a and 11b can be easily pulled out without using. Therefore, it is not necessary to prepare a separate screw when additionally connecting the remote control cord to the wiring joint 1, and the remote control cord is additionally connected to the wiring joint 1 by using the spare screws 11a and 11b provided in the wiring joint 1. The workability when doing can be improved.

Since the terminal block 4 is arranged at the front end portion of the case portion 8 of the wiring joint 1, it is possible to improve workability when the front plate of the outer case 20 is opened and the remote control cord is additionally connected with the wiring joint 1 closed. You can The workability is good even when additional wiring is connected while the wiring joint 1 is rotated and opened. Further, since the pair of left and right fixing member holding portions 6 and 7 are erected on the bottom plate portion 9 at the rear end portion of the case portion 8, the fixing member holding portions 6 and 7 do not hinder the wiring connecting work, and There is no fear of deterioration of sex.

The pair of remote control cords 32, 33 connected to the pair of left and right conducting plates 2, 3 can be respectively held between the pair of left and right fixing member holding portions 6, 7 and the rear end side wall portion of the peripheral wall portion 10. Therefore, the movements of the remote control codes 32 and 33 are restricted, so that it is possible to suppress problems such as disconnection. Further, it is possible to improve the workability by securing a work space for the remote control cord additional connection work and the like. The same applies to a remote control code additionally connected by adding a remote control.

The wiring joint 1 and the outer case 20 including the wiring joint 1 described above are not limited to the connection between the hot water supply device and the remote controller, and can be applied to other devices. In addition, those skilled in the art can implement various modifications to the above-described embodiment without departing from the spirit of the present invention, and the present invention includes such modifications.

1 Wiring joint 2, 3 Conducting plate 4 Terminal block 4a Partition wall parts 5a, 5b Screw (fixing member)
6, 7 fixing member holding portions 6a, 7a slit 8 case portion 9 bottom plate portion 9a connecting portion 10 peripheral wall portion 10a front end side wall portions 10b, 10c arcuate arm portion 10f supporting shaft portions 11a, 11b screw (preliminary fixing member)
12b, 12c Elastic wall part 20 Exterior case 25 Bottom plate 26 Opening part 26a Engaging part 26b Notch part 26c, 26d Standing wall part 30, 31 Internal wiring 32, 33 Remote control cord

Claims (6)

A terminal block provided with a pair of conducting plates; a pair of fixing members for connecting wiring terminals to the pair of conducting plates; and a pair of synthetic resin holding a pair of preliminary fixing members. In a wiring joint provided with a fixing member holding part,
Each of the pair of fixing member holding portions has a cylindrical wall portion,
The cylindrical wall portion has a slit provided in parallel with the axial direction of the cylindrical wall portion, the slit being capable of elastically deforming the cylindrical wall portion, and enabling the preliminary fixing member to be elastically held by the inner surface. Wiring joint characterized by. The wiring joint includes a case portion that accommodates the terminal block and the pair of fixing member holding portions,
The case portion has a bottom plate portion and a peripheral wall portion provided upright on an outer edge portion of the bottom plate portion,
The terminal block is arranged at a front end portion on one end side of the case portion,
The wiring joint according to claim 1, wherein the pair of fixing member holding portions are erected on the bottom plate portion at a rear end portion on the other end side of the case portion. The wiring according to claim 2, wherein wirings connected to the pair of conductive plates can be respectively held between the rear end side wall portion of the peripheral wall portion and the pair of fixing member holding portions. Fittings. An outer case including the wiring joint according to claim 2 or 3,
The wiring joint has a pair of left and right arcuate arm portions that extend upward and rearward in an arc shape from the left and right side wall portions of the peripheral wall portion and that has an engaging portion at a tip end portion thereof.
At the rear end of the peripheral wall portion, has a support shaft portion concentric with the axis of the arcuate arm portion,
The bottom plate portion has a connecting portion capable of connecting a wiring pipe by inserting a wiring,
The terminal block has a partition wall portion located between the pair of conductive plates, the front end portion of the partition wall portion protrudes forward from the front end side wall portion of the peripheral wall portion,
The outer case has an opening,
An engaging portion for engaging the support shaft portion at the rear end portion of the opening portion,
The front end portion of the opening has a notch portion with which the front end portion of the partition wall portion can engage.
An outer case, wherein the wiring joint is rotatably attached to the opening through the engaging portion and the support shaft portion. The opening portion has a pair of left and right standing wall portions that are erected on the left and right peripheral portions thereof,
The exterior case according to claim 4, wherein when the opening is closed by the wiring joint, the pair of left and right standing walls are in proximity to or in contact with the peripheral wall. The exterior case according to claim 4, wherein the exterior case is an exterior case of the water heater, and the wiring inserted in the connecting portion is a remote control cord.