JP2557079Y2 - Fire detector wire mounting bracket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor fitting for a fire detector in which a conductor can be easily attached and detached.

[0002]

2. Description of the Related Art Conventionally, when a fire detector consisting of a base and a sensor body is mounted on a ceiling surface or the like, first, the base is fixed to the ceiling surface or the like, and a blade metal fitting and a blade receiving metal fitting for the base are used. After loosening the connection screw screwed to the conductive metal fitting to form a gap between the connecting screw and the conductive metal fitting, inserting a conducting wire for transmitting power and a signal into the gap and tightening the screw, The sensor body is attached to the base. The conductor is taken out from the conductor passage in the center of the base and is fixed in a state of being bent in a predetermined direction.

[0003]

As described above, a conventional fire detector uses a screw to connect a lead wire to a base. In this method, however, the fire detector is mounted on a ceiling with a scaffold. When attaching a, it is necessary to work upward with the screw while looking at the ceiling surface. Therefore, a lot of time and effort are required for the work.

[0004] In addition, for work on the scaffold, the connecting screw that has been accidentally removed from the base may be dropped.
They may be lost.

The present invention has been made in view of the above circumstances, and has as its object to easily and reliably attach and detach a conductor to and from a fire detector.

[0006]

According to the present invention which achieves the above-mentioned object, it is necessary to provide the blade spring of the blade receiving member with the leaf spring.
On the back side of the fixed part, which is perpendicular to the length direction of the fixed part.
A wire passage is formed, and a side edge of the fixed portion is opposed to the wire passage.
Forming a bent portion that communicates with the conducting wire passage.
Forming a lead wire insertion hole, and further holding the lead wire in the bent portion.
Wire mounting bracket for fire detector characterized by having a part
It is.

[0007]

[ Function ] Formed on the back of the fixed part of the leaf spring of the blade holder
Formed in a bent portion facing the conductive wire passage
When a conductor is inserted through the conductor insertion hole, the tip of the conductor is inserted.
Moves forward while pressing the holding portion formed in the bent portion.
Then, it is sandwiched between the back surface of the fixing portion and the holding portion.

[0008]

EXAMPLES is illustrated by the examples accompanying drawings of this invention, describes an example of a NOTE on the first to understand the examples
Now, the embodiment will be described. Note that the same reference numerals are used for reference.
Throughout the examples and embodiments, the names and functions are the same.

First, a first reference example will be described with reference to FIGS. To the mounting base 2 of the base 1 of the fire detector, a metal fitting having conductivity, that is, a fixing portion 3 a of a blade receiving metal fitting 3 which is a conductive metal is fixed with a screw 4. This blade bracket 3
Is composed of a fixed plate 5 and a leaf spring 6 which are opposed to each other, and an outer peripheral edge 5a of the fixed plate 5 is separated from the protrusion 7, so that a gap is generated between the two.

[0010] Attachment base 2 on the back of fixing portion 3a of blade holder 3
The conductor passage 9 is formed from the center side of the base 1 to the outer peripheral side, and a concave receiving portion 10 is formed through the conductor passage 9.
Are formed. Therefore, the end portion 8 of the passage 9 is
It is exposed by the gap. The passage 9 is provided in the wire insertion hole 1.
It starts from 1 and continues to the inner wall surface 7a of the protrusion 7.

The receiving portion 10 is formed in parallel at two intervals, and has therein a lead wire fitting, for example, a locking spring 12.
Is accommodated. The locking spring 12 is a spring plate 12a formed in an M-shape in vertical section, and has both tip portions 12b, 12c.
Protrudes into the wire passage 9 and has one end 1
2c has its tip 12d bent inward.

[0012] Next, will be described operation of the reference example.
The spring plate 12a is accommodated in the accommodating portion 10 of the mounting base 2 of the base 1 such that the distal end portions 12b and 12c are on the blade receiving bracket 3 side. Screwed on,
The base 1 is fixed to a ceiling surface or the like after the back surface of the blade receiving member and the distal end portions 12b and 12c of the locking spring are pressed against each other.

A wire 15 for transmitting a power supply or a signal is bent toward the insertion hole 11 of the wire passage 9, and the leading end 1 is bent.
When the tip 5a is inserted into the wire passage 9 from the insertion hole 11, the tip 15a moves forward along the back surface of the fixing plate 5 of the blade holder, and further moves while pressing the tip 12b of the spring plate 12a in a predetermined direction. Then, it comes into contact with the tip 12c of the spring plate 12a. At this time, since the tip 12d of the tip 12c is bent inward, the tip 15a of the conductive wire can easily enter between the fixed plate 5 and the tip 12c of the spring plate 12. The insertion operation can be performed smoothly.

Further, when the wire is advanced, the leading end portion 15a of the conductive wire becomes
It collides with the inner wall surface 7a of the projection 7 and stops. At this time, the distal end portion 15a of the conductive wire is exposed at the terminal end portion 8, so that it is possible to confirm whether or not the conductive wire 15 is securely inserted by looking through the terminal end portion 8.

In this state, the tip 15 of the conductor 15
a is sandwiched between both end portions 12b and 12c of the spring plate 12a and the fixing plate 5, and the end portion 12b of the spring plate 12a is attached to the end portion 15a by the restoring force against the distortion of the conductive wire 15 at the time of insertion. It is securely fixed by digging.

Further, even if the conducting wire 15 is pulled in the opposite direction, the tip 12b of the spring plate rises, and
Since the distance between the wire b and the fixing plate 5 is reduced, that is, since the tip portion 12b serves as a stopper, the conducting wire 15 does not come off.

When a fire detector body (not shown) is mounted on the base 1, the mounting operation is completed.

Next, when the conductor 15 is detached from the base 1, the fire detector is detached from the base 1 and then communicates with the fixing plate 5 of the blade receiving member 3 through the housing portion 10 to face the locking spring 12a. When a driver or the like is inserted into the recess provided, that is, the insertion opening 5b and the distal end portion 12b of the locking spring 12a is concavely pressed in a predetermined direction, the engagement between the distal end portion 12b and the conductive wire 15 is released. Can be easily pulled out.

A second reference example will be described with reference to FIGS. The difference between the second embodiment and the first embodiment is that the inclined spring plate 20 is used as the locking spring. The inclined spring plate 20 includes a fixed end 21 and an inclined free end 22. As shown in FIG.
The fixed end portion 21 is fitted into the groove 23 of the housing portion 10 and
The free end 22 is inclined toward the protrusion 7, that is, inclined upward with respect to the insertion direction of the conductor, and has a tip 22 a
Protrudes into the wire passage 9 and presses against the back surface of the blade receiving member 3. When the conducting wire 15 is inserted into the conducting wire passage 9, the distal end 15a of the conducting wire 15 is sandwiched between the inclined spring plate 20 and the fixed plate 5 as shown in FIG. This is the same as the locking spring of the first reference example .
When the conductor 15 is detached from the base 1, a driver or the like is inserted into the insertion hole 11 provided in an extension of the fixing portion 5 from the side edge of the fixing portion 3 a, and the free end 22 and the conductor 15 are connected. Disengage.

Next, a first embodiment of the present invention will be described with reference to FIGS. The difference between the first embodiment and the first reference example is that the fixed end 6a of the leaf spring 6 of the blade holder is used as the conductor fitting. This fixed end 6
a is longer than that of the conventional one, and a bent portion 30 is formed on a side edge 6b of the fixed end portion 6a so as to bend toward the wire passage 9 on the back surface 6c. This bent part 30
Is formed of a spring plate, and cuts from the base end 31 toward the tip end 32 to form two rectangular tongue pieces 33,
The bending angle of the tongue piece 33 is adjusted so that the tip 33a of the tongue piece 33 projects into the wire passage 9. Tip 3 of this tongue
3a is inclined upward with respect to the conductor insertion direction,
Also, it is pressed against the back surface 6c of the fixed end to form the holding part of the conductor.
Has formed.

The bent portion 30 is fitted into the accommodating portion 10 of the mounting base 2, and both ends of the leaf spring fixing end 6 a of the blade holder 3 are screwed with screws 4 and 34. When the conducting wire 15 is inserted into the conducting wire passage 9, the leading end 15a of the conducting wire is sandwiched between the leading end 33a of the tongue piece 33 and the fixed end 6a of the leaf spring 6, as shown in FIG. The function of the tongue piece 33 is the first
This is the same as the locking spring of the reference example .

A second embodiment will be described with reference to FIGS. The second embodiment is different from the first embodiment in that the bent portion 30 is bent inward to form a mountain-shaped cross section, and an insertion hole 11 communicating with the conductor passage 9 is formed in the base end 31 side. At the same time, so that the tip 32 projects into the wire passage 9,
That is, the bending angle was adjusted. This tip 32
Is inclined upward with respect to the conductor insertion direction, and presses against the back surface 6c of the fixed end to form a holding portion for the conductor.
doing.

The bent portion 30 is fitted into the accommodating portion 10 of the mounting base 2, and both ends of the fixed end 6 a of the blade holder 3 are screwed with screws 4, 3.
Screw 4 on. When the conducting wire 15 is inserted into the insertion hole 11, the leading end 15a of the conducting wire 15 moves to the leading end 32 as shown in FIG.
Between the bent portion 30 and the leaf spring 6.
The operation of No. 2 is the same as that of the tongue piece of the first embodiment .

FIG. 17 is a sectional view showing the locking ring in the first embodiment.
It shows a modified example in which a spring is provided on the fire detector body.
That is, unlike the above-mentioned respective reference examples and embodiments, a case where the so-called direct-attached fire detector in which the fire detector main body is directly installed on a ceiling surface or the like without using a base, in which the lead wire mounting bracket, for example, the locking spring is used. It is. That is, in the case of the directly attached fire detector 40, a housing 43 is formed on the back surface 42 of the main body 41, for example, a printed circuit board, and the locking spring 12 of the embodiment is fitted into the housing 43, The conductor is attached to and detached from the directly attached fire detector 40 in the same manner as described above.

The function of the locking spring 12 is, of course, the same as that of the reference example .

It is a matter of course that a metal fitting having conductivity, that is, a metal fitting other than the blade receiving fitting 3 is used as the conductive metal fitting.

[0027]

[Effect of the Invention] Conductor mounting wire for fire detector according to the invention
Since the fixture was configured as described above, the conductor
When connecting the wire, insert the wire through the insertion hole
When the conductor is inserted into the conductor passage, the conductor is provided at the bent portion.
Since it is sandwiched between the holding part and the back of the fixed part,
There is no need to screw the conductor, and the attachment and detachment of the conductor is easy,
Moreover, it can be performed in a short time.

Further, a bent portion is formed on the side edge of the blade receiving fixture at the fixed end of the leaf spring, a lead wire insertion hole is provided in the bent portion, and a lead wire locking means is provided to form a lead wire mounting bracket. Therefore, if the leaf spring fixed end is attached to the base, it means that the conductor fitting is simultaneously attached. Therefore, the number of assembling steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a view showing a first reference example, and is a plan view showing a part of a base.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;

FIG. 5 is a sectional view showing another state of FIG. 4;

FIG. 6 is a view showing a second reference example, and is a plan view showing a part of a base.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a front view of FIG. 6;

FIG. 9 is a sectional view taken along line IX-IX of FIG. 6;

FIG. 10 is a sectional view showing another state of FIG. 9;

FIG. 11 is a view showing the first embodiment , and is a sectional view of a base.

FIG. 12 is a sectional view taken along line XII-XII of FIG. 11;

FIG. 13 is a perspective view of the conductor fitting of FIG. 11;

FIG. 14 is a view showing a second embodiment and is a longitudinal sectional view of a base.

FIG. 15 is a sectional view taken along line XV-XV in FIG. 14;

FIG. 16 is a perspective view of the conductor fitting of FIG. 14;

FIG. 17 is a partial cross-sectional front view showing a modification of the first reference example .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 3 Blade holder 3a Fixed part 6 Leaf spring 9 Conductor path 10 Housing part 12 Locking spring 20 Inclined spring plate 30 Bend part 33 Tongue piece 40 Directly attached fire detector

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Open to the public Showa 62-165672 (JP, U) Open to the public Showa 49-3096 (JP, U) Open to the public Showa 56-78173 (JP, U) Open to the public Showa 53- 67386 (JP, U) Fully open 1988-197194 (JP, U) Fully open 1987-165672 (JP, U) Fully open 1987-105594 (JP, U) Fully open 1987-88061 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A back surface of a fixed portion of a leaf spring of a blade receiving member.
Forming a conducting wire passage orthogonal to the length direction of the fixed portion;
A bent portion is formed on a side edge of the fixed portion so as to face the conductive wire passage.
And forming a conducting wire insertion hole communicating with the conducting wire passage in the bent portion.
And that the bent portion is provided with a holding portion for a conducting wire.
Characteristic conductor mounting bracket for fire detectors. 2. A back surface of a fixing portion of a leaf spring of a blade receiving member.
Forming a conducting wire passage orthogonal to the length direction of the fixed portion;
A bent portion is formed on a side edge of the fixing portion so as to face the conductive wire passage, and the bent portion is cut and raised from a base end toward a distal end to form a tongue piece. A wire mounting bracket for a fire detector, characterized in that it protrudes into the inside. 3. A back surface of a fixing portion of a leaf spring of a blade receiving member.
Forming a conducting wire passage orthogonal to the length direction of the fixed portion;
Forming a bent portion on the side edge of the fixing portion facing the conductive wire passage, bending the bent portion inward to form a mountain-shaped cross section,
A lead mounting bracket for a fire detector, wherein a tip of the lead protrudes into the lead passage and an insertion hole communicating with the lead passage is formed in a base end side of the lead.