JP2601324Y2 - Fire alarm equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to equipment for fire alarm equipment such as fire detectors and fire alarms, and more particularly, to the removal of sheaths of electric wires such as power lines and signal lines connected to these equipment. The present invention relates to a strip gauge provided on a device for setting a length.

[0002]

2. Description of the Related Art Usually, a strip gauge is provided on a bottom wall or the like of fire alarm equipment such as a fire detector and a fire alarm. This is because when installing these fire alarm equipment on the ceiling or wall, the insulation of electric wires such as power supply lines and signal lines drawn from the wire outlets provided on the ceiling, wall, etc. is removed by a predetermined length. In order to connect the removed portion to the terminal provided on the fire alarm equipment, the length of the portion from which the coating of the electric wire is removed is set on site.

FIG. 6 is a plan view showing an example of a base of a conventional fire detector provided with a strip gauge. In the drawing, 1 is a base having a peripheral wall 1a, 2 is a bottom wall thereof, and a wire outlet hole 3 is provided in the center. 4a, 4
b, 4c, 4d are bases 1 through the drawer holes provided in the ceiling or the like.
Terminal for connecting the electric wire drawn through the drawing hole 3 of
Reference numerals 5a, 5b, 5c, and 5d denote blade brackets for mechanically and electrically coupling a sensor body (not shown) to the base 1. Numerals 6a and 6b denote strip gauges formed in the bottom wall 2 and having arc-shaped grooves in cross section. As shown in FIG. 7, the length L is the length of the portion (1 in FIG.
5 mm).

In order to mount the above-described base 1 on a ceiling or the like, an electric wire drawn from a drawing port provided in the ceiling or the like is drawn out from a drawing hole 3 of the base 1 and an end portion thereof is strip gauge as shown in FIG. 6a or 6b, the jig such as a nipper is applied to the opening of the strip gauge 6a (or 6b) to pinch the electric wire 8, and the electric wire 8 is pulled while cutting the coating. The portion corresponding to the length of the coating is removed.

[0005] Next, the portion of the electric wire 8 from which the coating has been removed is connected to one of the terminals 4a to 4d. And base 1
So that the drawer hole 3 of the base overlaps the drawer of the ceiling
Through holes 7a, 7b provided in the bottom wall 2
Insert the fixing screw into and fix it. After the base 1 is first attached to the ceiling or the like, the wire drawn from the drawer hole 3 is applied to the strip gauges 6a and 6b to remove the coating.
This may be connected to terminals 4a-4d. The strip gauges 6a and 6b may be provided on the bottom wall 2 or the like by silk printing instead of being formed in a groove shape on the bottom wall 2 as shown in the figure.

[0006]

Since the grooves of the strip gauges 6a and 6b as described above are relatively shallow, it is difficult to maintain the state in which the wires are fitted, and the wires easily pass over a predetermined length. On the other hand, when the electric wire is thick, it is difficult to fit into the groove, so that it is difficult to remove the covering to an accurate length. In addition, when the wire is inserted into the groove, the end portion is easily lifted up, so that there are various problems such as the need to remove the coating while pressing with a finger, and these problems hinder the improvement of the workability of the fire alarm equipment. Was. In addition, when the strip gauge was formed by silk printing, the above-mentioned problem was more remarkable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a strip gauge which can surely remove a covering of an electric wire to a predetermined length and can further improve workability. The purpose is to obtain fire alarm equipment.

[0008]

A device for fire alarm equipment according to the present invention has a wire insertion hole having a length corresponding to the length of a portion whose tip is closed and a wire covering is removed. It is provided with a strip gauge composed of a tubular body formed integrally. In the above fire alarm equipment, a window is provided by cutting off part or all of the vicinity of the distal end of the tubular body of the strip gauge.

[0009]

The electric wire drawn out of the drawing hole is inserted into the electric wire insertion hole of the strip gauge until the tip of the electric wire hits the closing portion. Next, a jig such as a nipper is applied to the wire insertion hole to sandwich the wire, and the wire is pulled out while cutting the coating. As a result, a predetermined length of the coating is removed from the electric wire. When a window is provided in the cylindrical body, whether or not the electric wire is securely inserted into the electric wire insertion hole is visually recognized from the window.

[0010]

FIG. 1 is a perspective view showing a main part of a first embodiment of the present invention.
Is a base as a main body , 2 is a bottom wall of the base 1, 3 is a lead-out hole of an electric wire provided on the bottom wall 2, 7 a is an insertion hole of a fixing screw,
Reference numeral 9 denotes a mounting portion of the terminal 4a provided on the bottom wall 2, and reference numeral 10 denotes a mounting portion of the blade holder 5a.

As shown in FIG. 2, a strip gauge 11 has an insertion hole 13 into which an electric wire is inserted, and is formed of a cylindrical body 12 having a closed end, and is disposed on the bottom wall 2 of the base 1. And are provided integrally. The insertion hole 13 is formed to have a size in which the electric wire is inserted, and the opening 14 is enlarged in diameter so that the electric wire can be easily inserted. Part length (for example, 15m
m).

Strip gauge 1 constructed as described above
As shown in FIG. 3, the electric wire 8 is inserted from the opening 14 into the insertion hole 13 until its tip hits the bottom (stopper) 15.
Is inserted, and a jig such as a nipper is applied to the opening 14 so that the electric wire 8
When the wire 8 is pulled out while cutting the coating, the coating can be removed to a predetermined length.

Embodiment 2 FIG. 4 is a perspective view of a second embodiment of the present invention. In the present embodiment, a window 16 is provided by cutting off part or all of the vicinity of the distal end of the cylindrical body 12, and the length L from the opening 14 to the vertical wall (stopper) 17 of the window 16 is set to cover the electric wire. The length is made equal to the length of the part to be removed. With this configuration, it is possible to visually recognize from the window 16 whether or not the electric wire inserted into the insertion hole 13 from the opening 14 has been reliably inserted to a predetermined length. In the first and second embodiments, the peripheral wall 1a of the base 1 may be used as a stopper for the insertion hole 13 depending on the position where the strip gauge is provided.

Embodiment 3 FIG. 5 is a perspective view of a main part showing a third embodiment of the present invention. In this embodiment, a strip gauge 11 is attached to the bottom wall 2 of the base 1 and to the bottom wall 2. It stands almost vertically. With this configuration, the operation of inserting the electric wire and removing the coating is further facilitated. When removing the covering of the electric wire with the base 1 attached to the ceiling, the removed covering falls as soon as the electric wire 8 is pulled out. In addition, depending on the height of the strip gauge 11, the base 1
May be provided on the peripheral wall 1a of
And the peripheral wall 1a may be provided upright on the bottom wall 2 to eliminate the stopper, and the wire insertion hole 13 may be used as a fixing screw insertion hole when the base 1 is mounted on a ceiling or the like. Further, as in the second embodiment, a window 16 can be provided at a lower portion of the tubular body 12.

In the above description, the case where the strip gauge according to the present invention is provided on the base of the fire detector is shown.
The present invention is not limited to this, and can be appropriately provided on a main body having a terminal for connecting an electric wire in a fire alarm equipment such as a fire detector, a fire alarm, a receiver or a transmitter. Also, the diameter of the insertion hole is preferably formed larger than the diameter of the electric wire so that the covering portion removed from the electric wire is not dull. Further, the cylindrical body can be manufactured at a low cost by being formed integrally with the main body, but may be formed separately from the main body.

[0016]

As is clear from the above description, the fire alarm equipment according to the present invention has a wire insertion hole having a length corresponding to the length of the portion where the tip is closed and the wire covering is removed. Since the strip gauge consisting of a cylindrical body is provided integrally with the main body, when the electric wire is inserted into the electric wire insertion hole, the tip part hits the closed part and cannot be pushed further, so the length of the part to remove the coating is ensured. Can be set to

Further, since the electric wire is inserted into the electric wire insertion hole provided in the cylindrical body, the electric wire does not move or the tip does not float. Therefore, it is not necessary to press the electric wire with a finger when removing the covering, and the workability of the fire alarm equipment can be improved.

Further, by providing a window near the distal end of the tubular body, the state of the electric wire inserted into the electric wire insertion hole can be visually recognized, so that there is no possibility that the covering of the electric wire is removed to an incorrect length.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a first embodiment of the present invention.

FIG. 2 is a perspective view of a strip gauge portion of FIG.

FIG. 3 is an explanatory diagram of an operation of a strip gauge.

FIG. 4 is a perspective view of a strip gauge portion according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a main part of a third embodiment of the present invention.

FIG. 6 is a plan view showing an example of a base of a conventional fire detector.

FIG. 7 is a perspective view of a strip gauge part of FIG. 6;

FIG. 8 is an operation explanatory view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Bottom wall 4a-4d Terminal 6a, 6b, 11 Strip gauge 8 Electric wire 12 Cylindrical body 13 Insertion hole 16 Window

Claims (2)

(57) [Scope of request for utility model registration] 1. A strip gauge comprising a tubular body integrally formed with a main body, the wire gauge having an electric wire insertion hole having a length corresponding to the length of a portion whose end is closed and from which the coating of the electric wire is removed. A fire alarm equipment. 2. The fire alarm equipment according to claim 1 , wherein a window is provided by partially or entirely cutting off the vicinity of the distal end of the tubular body.