JP6845464B2 - Heater fixture - Google Patents

Description

The present invention relates to a heater fixture suitable for applications such as mounting a heater on a heat exchanger for the purpose of preventing freezing of the heat exchanger of a hot water supply device.

As an example of the heater fixture, there is one described in Patent Document 1.
The heater mounting tool described in the same document has a configuration in which a clamp mounting portion capable of mounting a clamp on a mounting target portion is continuously provided in a holder portion that holds the heater. The clamp mounting portion includes a clamp piece portion having an engaging portion that engages with the mounting target portion when the clamp is mounted on the mounting target portion. According to such a configuration, it is possible to set the heater attachment so as not to be inadvertently detached from the attachment target portion.

However, in the above-mentioned prior art, the following problems may occur.

That is, conventionally, the work of attaching the heater attachment to the attachment target portion is performed from the front of the attachment target portion. Further, the removal thereof is also performed by pulling the heater mounting tool to the front of the mounting target portion. However, when the heater fitting is used under various conditions, there is another member or device in front of the mounting target part of the heater mounting part, which becomes an obstacle and the heater mounting tool is mounted from the front of the mounting target part. It may be difficult to install. Conventionally, no measures have been taken to appropriately deal with such a situation. As a result, conventionally, it has been necessary to remove a member or device that interferes with the heater fitting, and then attach / detach the heater fitting, which has been complicated.

Japanese Unexamined Patent Publication No. 2013-221709

The present invention has been conceived under the above-mentioned circumstances, and even if the front surface of the mounting target portion is partially blocked by another member or device, the mounting target is to be mounted. The challenge is to provide a heater fixture that can be easily and appropriately attached to and detached from a site.

In order to solve the above problems, the following technical measures are taken in the present invention.

The heater mounting tool provided by the present invention includes a holder portion for holding the heater and a clamp mounting portion that is connected to the holder portion and can be clamped to the mounting target portion. The mounting portion is a heater mounting tool including a clamp piece portion having an engaging portion that engages with the mounting target portion when the clamp is mounted on the mounting target portion, and the clamp mounting portion is the holder portion. It is provided with a support piece portion that stands up in the vertical height direction from the above, the clamp piece portion is provided so as to project forward from the support piece portion, and a boundary portion between the clamp piece portion and the support piece portion. It is possible to swing and displace in the vertical height direction around the center, and when the clamp piece is pressed forward, the clamp piece portion engages with the mounting target portion and the engaging portion with the boundary portion as the center. It is characterized in that it is further provided with an operating piece portion that stands up in the vertical height direction from the trailing edge portion of the clamp piece portion so as to be displaced in the direction in which the combined state is released.

According to such a configuration, the following effects can be obtained.
That is, by operating the operating piece, it is possible to set the mounting target portion and the engaging portion of the clamp piece to not engage with each other. With such a setting state, the heater fixture can be mounted not only from the front of the mounting target portion but also from a direction other than the front, for example, a lateral direction. Similarly, it can be removed in a direction other than the front of the mounting target portion. As a result, even if the front of the mounting target part is partially covered by other members or equipment and it is difficult to place the heater mounting tool in front of the mounting target part, the heater mounting tool can be mounted / removed. Can be easily and appropriately performed. Therefore, it is highly flexible and convenient to use.

Further, according to the above configuration, a state in which the engagement portion of the clamp piece portion and the attachment target portion are disengaged can be appropriately set by a simple structure and operation, and the operation intended by the present invention can be set. Can be obtained accurately.

In the present invention, preferably, an auxiliary operation piece portion protruding in the lateral width direction from the support piece portion is further provided.

According to such a configuration, when the operation piece is pressed with a finger, the auxiliary operation piece can be operated by making the other finger touch the auxiliary operation piece. It can be used as a fulcrum when pressing one part. Therefore, it becomes easy to press the operating piece stably and strongly. Further, since the auxiliary operation piece is provided on the support piece, even if a finger force is applied to the auxiliary operation piece, this force is applied to the engaging part of the clamp piece and the attachment target part. It is possible to prevent it from acting as a force that unreasonably hinders the action of disengaging the engaged state.

In the present invention, preferably, the clamp piece portion has a form extending in the lateral width direction, and the engaging portion includes at least a pair of engaging portions located at intervals in the lateral width direction. As the operation piece and the auxiliary operation piece, a pair of operation pieces and a pair of auxiliary operation pieces located at intervals in the lateral width direction are provided.

According to such a configuration, since the clamp piece portion extends in the lateral width direction and at least one pair or more of the engaging portions are provided, it is preferable in order to stabilize the mounting state on the mounting target portion. On the other hand, since the operation piece and the auxiliary operation piece are provided in pairs, it is possible to operate these parts with both hands and press the operation piece with a strong force. Therefore, it is possible to appropriately release the engagement state between each engaging portion and the mounting target portion.

In the present invention, preferably, the pair of auxiliary operation pieces are provided at positions outside the pair of operation pieces in the width direction.

According to such a configuration, as described in the embodiment described later, the pair of operation pieces are pressed by the thumbs of both hands while the index finger or the middle finger of both hands is applied to the pair of auxiliary operation pieces. It becomes possible. As a result, the heater fitting can be easily held with both hands while the engaging portion and the mounting target portion are disengaged, and the workability of mounting and removing the heater fitting can be improved. It will be possible.

Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

It is a front perspective view which shows an example of the heater attachment which concerns on this invention. It is an exploded perspective view of the heater attachment of FIG. It is a rear perspective view of FIG. (A) is a sectional view taken along line IVa-IVa of FIG. 3, and FIG. 3B is a sectional view taken along line IVb-IVb of FIG. (A) is a cross-sectional view of a main part showing a usage state of the heater fitting shown in FIG. 1, and (b) is a cross-sectional view of the main part. FIG. 5A is a perspective view of a main part of FIG. 5A. FIG. 5A is an exploded perspective view of a main part of FIG. 5A.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

The heater fixture A shown in FIGS. 1 to 4 is formed by pressing a metal plate made of stainless steel or the like, and is connected to a holder portion 1 for holding the heater H and the holder portion 1. The clamp mounting portion 2 provided is provided. The heater H is an electric heating type having a substantially cylindrical shape as a whole, and lead wires 90 are connected to both ends thereof.

The holder portion 1 has a basic cross-sectional shape formed in a substantially U shape with an open front surface, an upper piece portion 10, an upright piece portion 11 standing downward from the rear portion of the upper piece portion 10, and the holder portion 1. An intermediate piece portion 12 projecting forward from the lower end of the standing piece portion 11 is provided. The upper piece portion 10, the standing piece portion 11, and the intermediate piece portion 12 are all in a form extending in the lateral width direction. However, the upper piece portion 10 and the intermediate piece portion 12 are appropriately divided into a plurality of regions in the lateral width direction. The heater H is held by the holder portion 1 so as to be sandwiched between the upper piece portion 10 and the intermediate piece portion 12. As a means for ensuring the holding of the heater H, a heater holding piece portion 13 having a spring property in the vertical direction is also appropriately provided.

The clamp mounting portion 2 includes a plurality of support piece portions 20 that stand downward from the upright piece portion 11 of the holder portion 1, a clamp piece portion 21 that is connected to the lower portion of the plurality of support piece portions 20 and projects forward, and a pair of left and right sides. The operation piece 3 and a pair of left and right auxiliary operation pieces 4 are provided.

The clamp piece portion 21 extends in the lateral width direction, and includes a pair of left and right engaging portions 21a located at the tip end portion thereof and partially projecting forward. Each engaging portion 21a is a portion for engaging with the attachment target portion, and has, for example, a shape bent in a substantially F-shaped cross-sectional view. Preferably, each engaging portion 21a is provided so as to be located in front of the supporting piece portion 20. The area between the clamp piece 21 and the intermediate piece 12 is a clamp area 38 whose front side is open, and the mounting target portion is vertically high by both the clamp piece 21 and the intermediate piece 12 in this clamp area 38. It is clamped in the vertical direction. Therefore, in the present embodiment, the intermediate piece portion 12 also serves as a component of the holder portion 1 and a component of the clamp mounting portion 2. The clamp piece portion 21 has a spring property that can be deformed or displaced so as to swing in the vertical height direction around the boundary portion C (near the lower end portion of the support piece portion 20) with the support piece portion 20. Have. The width of each support piece 20 is reduced as a means for facilitating such deformation or displacement of the clamp piece 21.

Each operating piece 3 is a portion for pressing when attaching / detaching the heater attachment A to / from the attachment target portion, and stands upward from the trailing edge portion of the clamp piece 21. Preferably, in the side view of the heater attachment A, the operating piece 3 is provided in a posture of standing up from the boundary C or the vicinity of the boundary C between the clamp piece 21 and the support piece 20. According to such a configuration, when the operating piece 3 is pressed forward as indicated by the arrow N1, the clamp piece 21 rotates downward about the boundary C, and the engaging portion 21a is engaged. Descend. The operating piece 3 is provided at a position relatively close to the engaging portion 21a, and is a flat surface portion that faces backward (front) and has a certain area so that the operator can easily press the front with a finger. have. The trailing edge of the clamp piece 21 is provided with an upwardly upright protruding piece 91 different from the operation piece 3 described above, and the lead wire 90 of the heater H is hooked and held. (Omitted in the drawing) This is a part to be omitted.

Each auxiliary operation piece 4 is a part for facilitating this operation when the operation piece 3 is pressed forward with a finger, and is from an intermediate position in the vertical height direction of the support piece 20. It protrudes outward in the horizontal width direction and is located on the outer side in the horizontal width direction with respect to the operating piece 3. The auxiliary operation piece 4 is used so that the index finger or the middle finger is pressed against the front surface of the auxiliary operation piece 4 when the operation piece 3 is pressed forward with the thumb. Therefore, the auxiliary operation piece 4 is eventually pressed backward as indicated by the arrow N2. This makes it easier to press the operating piece 3 forward with a strong force with the thumb. Since the force in the direction indicated by the arrow N2 also acts as a force for pulling the engaging portion 21a toward the auxiliary operating piece 4 side, when the operating piece 3 is pressed forward and the engaging portion 21a is lowered. , The effect of increasing the amount of descent may also occur. Like the operating piece 3, the auxiliary operating piece 4 also has a shape and size that are easy to operate with fingers.

Next, an example of using the heater attachment A described above and its operation will be described.

5 and 6 show an example in which the heater fitting A is attached to the bend pipe 70 of the primary heat exchanger 7A of the hot water supply device B. The hot water supply device B has primary and secondary heat exchangers 7A and 7B having heat transfer tubes 72 and 73 for sequentially recovering sensible heat and latent heat from the combustion gas generated by the burner 71, respectively. The combustion gas (exhaust gas) that has passed through the secondary heat exchanger 7B is finally configured to be exhausted to the outside via the exhaust top 74.

The primary heat exchanger 7A has a configuration in which a plurality of straight heat transfer tubes 72 that are joined through a plurality of fins 76 are connected to each other outside the can body 75 by using a plurality of bend tubes 70. is there. The plurality of bend pipes 70 are arranged as shown in FIG. 7, and originally, as shown by the virtual line in the figure, the bend pipe 70 is moved forward by advancing the heater fitting A from the front surface of the bend pipe 70. It is possible to mount it on the 70. Further, in the case of removal, the heater attachment A may be originally pulled to the front.

However, as shown in FIGS. 5A and 6, in the hot water supply device B, a part of the exhaust top 74 is located in front of the heater attachment A in close to the attachment location, and the heater is attached. When the tool A is pulled to the front, the heater mounting tool A interferes with the exhaust top 74, making it difficult to remove the tool A. On the other hand, in the heater attachment A of the present embodiment, as described above, the engaging portion 21a of the clamp piece portion 21 can be lowered by pressing the operating piece portion 3 forward. Therefore, for example, as shown in FIGS. 5 and 6, even if the heater attachment A is already attached to the bend pipe 70 and the engaging portion 21a is engaged with the lower surface side of the bend pipe 70, even if the heater attachment A is already attached to the bend pipe 70. This engaged state can be released, which makes it possible to easily slide the heater attachment A in the lateral direction (direction indicated by the arrow N3) with respect to the bend pipe 70. If the heater fitting A is slid in such a direction, interference with the exhaust top 74 can be avoided and the heater fitting A can be appropriately removed. After that, when the heater attachment A is attached to the bend pipe 70, it is the same as described above, and the heater attachment A is in a state where the operating piece 3 is pressed forward and the engaging portion 21a is lowered. Can be attached to the bend tube 70 by sliding the above in the direction indicated by the arrow N3. Therefore, it is possible to eliminate the need to remove the exhaust top 74 when attaching / detaching the heater attachment A.

When pressing the pair of operation pieces 3, the thumbs of both hands are placed on the front side of the pair of auxiliary operation pieces 4 while the thumbs of both hands are on the rear side of the pair of operation pieces 3. It can be in a mode of pressing against. According to such an aspect, the operator inevitably grips the heater attachment A with both hands. Therefore, it is possible to easily and appropriately perform the operation of sliding the heater attachment A in the lateral direction while maintaining the state in which the engaging portion 21a is lowered by pressing the operating piece portion 3.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the heater fitting according to the present invention can be variously redesigned within the scope intended by the present invention.

In the above-described embodiment, the holder portion 1 of the heater H is arranged on the upper side and the clamp mounting portion 2 is arranged on the lower side, but the present invention is not limited to this, and the heater H may be turned upside down. From the viewpoint of improving operability, it is preferable to provide one pair of operation pieces and one pair of auxiliary operation pieces, but the present invention is not limited to this, and for example, the operation piece and the auxiliary operation piece may be provided. It is also possible to have a configuration in which only one is provided.
The mounting target portion in the present invention is not limited to the bend tube of the primary heat exchanger. It is possible to use other parts of the hot water supply device or devices / equipment other than the hot water supply device as the mounting target parts. The heater is not limited to a columnar one.

A Heater fixture C Boundary (between the support piece and the clamp piece)
H Heater 1 Holder part 2 Clamp mounting part 20 Support piece part 21 Clamp piece 21a Engagement part 3 Operation piece 4 Auxiliary operation piece 70 Bend pipe (mounting target part)

Claims (4)

The holder that holds the heater and
A clamp mounting part that is connected to this holder part and can be clamped to the mounting target part,
Is equipped with
The clamp mounting portion is a heater mounting tool including a clamp piece portion having an engaging portion that engages with the mounting target portion when the clamp is mounted on the mounting target portion.
The clamp mounting portion includes a support piece portion that stands up from the holder portion in the vertical height direction.
The clamp piece portion is provided so as to project forward from the support piece portion, and can be oscillated and displaced in the vertical height direction about a boundary portion between the clamp piece portion and the support piece portion. ,
When the clamp piece is pressed forward, the clamp piece is displaced in a direction in which the engagement state between the mounting target portion and the engaging portion is released with the boundary portion as the center. A heater fitting that further includes an operating piece that stands up from the trailing edge in the vertical height direction. The heater attachment according to claim 1.
A heater fixture further provided with an auxiliary operation piece protruding from the support piece in the lateral width direction. The heater attachment according to claim 2.
The clamp piece portion has a form extending in the lateral width direction, and includes at least a pair of engaging portions located at intervals in the lateral width direction as the engaging portion.
A heater attachment comprising a pair of operating pieces and a pair of auxiliary operating pieces located at intervals in the lateral width direction as the operating piece and the auxiliary operating piece. The heater attachment according to claim 3.
The pair of auxiliary operation pieces are heater attachments provided at positions outside the pair of operation pieces in the width direction.

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