JP2022010404A - Attachment/detachment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment/detachment device that can be used to attach and detach a sensing device installed on a ceiling, etc., and to attach and detach a dust-proof cover for the sensing device to protect the sensing device.

SOLUTION: A dust-proof cover 100 can be removed from a sensing unit 1 by moving a detachable unit 6 away from the sensing unit 1 while holding the cup 10 between a pair of claws 8, and pulling the dust-proof cover 100 away from the sensing unit 1. The dust-proof cover 100 can be attached to the sensing unit 1 by placing a pair of protrusions 8a of the detachable unit 6 against the bottom of a cup 10 of the dust-proof cover 100, putting the cup 10 of the dust-proof cover 100 over a head part 5 of the sensing unit 1 with the dust-proof cover 100 for the sensing unit supported by the detachable unit 6, and engaging a convex part 11 of the cup 10 with an opening 5a of the head part 5.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

INDUSTRIAL APPLICABILITY The present invention can be used to attach / detach a detector installed on a ceiling or the like, and can also be used to attach / detach a dustproof cover for a detector for protecting the detector to / from the detector. Regarding.

Conventionally, a dustproof cover that is attached so as to cover the sensor until the interior work is completed is known so that dust generated during work such as interior work does not enter the sensor.
This dustproof cover has a concave portion that covers a plurality of smoke inlets formed on the side surface of the sensor in a substantially sealed manner to prevent dust and dirt from entering, and a plurality of engaging protrusions formed on the inner surface of the concave portion. The engagement protrusion is engaged with the smoke inlet so that it can be attached to the sensor.
When the dustproof cover is removed from the detector, a removal jig having an engaging portion that can be engaged with the notch or groove formed in the dustproof cover is used (see, for example, Patent Document 1). .. Specifically, the dustproof cover is removed from the sensor by rotating the removal jig with the engaging portion of the removal jig fitted in a predetermined notch or groove.

Further, a detachable device for attaching / detaching a sensor installed on a ceiling or the like is known (see, for example, Patent Document 2).
This detachable device for the sensor is equipped with a plurality of protruding claws that fit into an opening such as a smoke inlet of the sensor, and the detachable device is fitted with the protruding claws fitted to the opening of the sensor. The sensor body can be removed from the base body by rotating it in one direction, and the sensor body can be attached to the base body by rotating the detachable device in the other direction.

Japanese Unexamined Patent Publication No. 6-314386 Japanese Unexamined Patent Publication No. 2005-352801

By the way, as described above, both the attachment / detachment device for attaching / detaching the detector installed on the ceiling and the removal jig for removing the dustproof cover from the detector are long instruments that reach the ceiling. Since they are different instruments, the worker selects the instrument according to the purpose of the work and brings it to the work site, or both instruments are brought to the work site.
If one of the tools is brought to the work site and the other tool is needed, the required tool must be returned to the work site, which leads to a loss of work time. there were. In addition, even if both instruments are brought to the work site, only one of them may be used, and it may be troublesome to continue carrying both long instruments.

Therefore, as a result of diligent studies on a technology that does not require the use of two devices properly, the present inventors have found a technique for attaching and detaching a dustproof cover for a sensor to and from the sensor by using a detachable device that allows the sensor to be attached and detached. ..

An object of the present invention can be used to attach / detach a sensor installed on a ceiling or the like, and also to attach / detach a dustproof cover for a sensor for protecting the sensor to / from the sensor. It is to provide a detachable device.

In order to solve the above problems, the invention according to claim 1 is
A detacher used to attach and detach the detector from the detector base.
It has a bowl that can cover and engage the head of the sensor.
The bowl portion is configured to be able to cover the bottomed cylindrical cup portion of the dustproof cover for the detector, and has at least a pair of claw portions that can be fitted into the uneven shape formed on the head portion. Has a protrusion,
The claw portion is provided along the radial direction of the bowl portion, and the protrusion portion in the claw portion is provided so as to project inward along the radial direction of the bowl portion.
The claw portion sandwiches the cup portion, and the protrusion portion abuts on the cup portion and is configured to be able to support the cup portion.
It is characterized in that the dustproof cover for the sensor can be attached to or removed from the sensor.

With the detachable device having the above configuration, in addition to attaching / detaching the detector installed on the predetermined installation surface, it is possible to attach / detach the sensor dustproof cover for protecting the detector to / from the detector. ..
Specifically, the detachable device is placed in a state where the bowl portion of the detachable device is covered with the head portion of the sensor and the protrusion of the claw portion is fitted into the uneven shape formed on the head portion of the sensor. The sensor can be removed by rotating it in one direction, and the sensor can be attached by rotating the attachment / detachment device in the other direction.
Also, when removing the dustproof cover for the detector attached to the sensor, if the cup is sandwiched between the pair of claws of the detacher and the detacher is moved away from the detector, it will be removed from the detector. The dustproof cover for the sensor can be easily removed by pulling it apart.
In addition, when attaching the dustproof cover for the detector to the sensor, a pair of protrusions of the detachable device are brought into contact with the bottom surface side of the cup portion of the dustproof cover for the detector, and the dustproof cover for the detector is supported by the detachable device. If the dust-proof cover for the sensor and the detachable device are brought closer to the sensor, the cup part of the dust-proof cover for the sensor is put on the head part of the sensor, and the convex part of the cup part is engaged with the uneven shape of the head part. , The sensor dust cover can be easily attached to the sensor.

The invention according to claim 2 is the attachment / detachment device according to claim 1.
The protrusions are characterized in that they are provided on the tip end side of the claws at predetermined intervals.

According to the above configuration, since the dustproof cover for the sensor can be suitably supported by the detachable device, it becomes easy to attach the dustproof cover for the sensor to the sensor.

The invention according to claim 3 is the attachment / detachment device according to claim 1 or 2.
On the side surface of the cup portion, a convex portion is provided which engages with the uneven shape of the head portion and engages the dustproof cover for the sensor with the sensor.
The protrusion is characterized in that it is provided in an arrangement that does not reach a position corresponding to the protrusion of the cup.

According to the above configuration, the cup portion can be suitably sandwiched between the pair of claw portions, and the dustproof cover for the sensor can be easily removed from the sensor.

The invention according to claim 4 is the attachment / detachment device according to any one of claims 1 to 3.
On the side surface of the cup portion, a convex portion is provided which engages with the uneven shape of the head portion and engages the dustproof cover for the sensor with the sensor.
The detachable device is characterized in that the holding force of the pair of claws holding the cup portion is stronger than the engaging force in which the convex portion of the cup portion is engaged with the uneven shape of the head portion. ..

According to the above configuration, the dustproof cover for the sensor can be easily removed from the sensor by the detachable device.

The invention according to claim 5 is the attachment / detachment device according to any one of claims 1 to 4.
On the side surface of the cup portion, a convex portion is provided which engages with the uneven shape of the head portion and engages the dustproof cover for the sensor with the sensor.
The detachable device is characterized in that the frictional resistance force between the protrusion and the side surface of the cup portion is larger than the frictional resistance force between the convex portion of the cup portion and the head portion.

According to the above configuration, the dustproof cover for the sensor can be easily removed from the sensor by the detachable device.

According to the present invention, it can be used to attach / detach a sensor installed on a ceiling or the like, and a dustproof cover for a sensor for protecting the sensor can be used to attach / detach to / from the sensor. A detacher is obtained.

It is a perspective view which shows the dust-proof cover for a sensor of this embodiment, the sensor installed on the ceiling, and the attachment / detachment device for a sensor. It is sectional drawing which shows the attachment / detachment device which attaches / detaches the sensor (the sensor main body). It is sectional drawing which shows the state which the dustproof cover for a sensor of this embodiment is attached to a sensor. It is a bottom view (a) which shows the mode of removing the dust-proof cover for a sensor attached to a sensor by a detachable device, and the sectional view (b) in line AA of FIG. 4 (a). It is a bottom view (a) which shows the mode of removing a dustproof cover for a sensor attached to a sensor by a detachable device, and is a sectional view (b) in line BB of FIG. 5 (a). It is sectional drawing which shows the state which the dustproof cover for a sensor is removed from a sensor by a detachable device. It is sectional drawing which shows the state which attaches the dustproof cover for a sensor to a sensor by a detachable device.

Hereinafter, embodiments of the dustproof cover for a sensor and the detachable device according to the present invention will be described in detail with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

In buildings where an automatic fire alarm system is installed, detectors that detect smoke, heat, and flames are installed on the ceiling and side walls.
The dustproof cover 100 for a sensor is attached and used so as to cover the sensor 1 in order to protect the sensor 1 from dust generated during work such as interior work, and is removed from the sensor 1 after the work is completed. Is.
In this embodiment, a sensor dustproof cover 100 used by being attached to a sensor 1 installed on a ceiling C, which is a predetermined installation surface, for detecting smoke will be described.

As shown in FIGS. 1 and 2, the sensor 1 is installed on the ceiling C, and the base body 2 fixed to the ceiling C and the sensor main body 3 detachably provided on the base body 2 It is configured with.
The sensor main body 3 has a substantially disk-shaped base portion 4 and a substantially cylindrical head portion 5 protruding downward from the center side of the base portion 4.
An opening 5a for allowing smoke to flow into the sensor 1 is formed on the side surface of the head portion 5. In the present embodiment, four openings 5a are formed on the side surface of the head portion 5 at equal intervals in the circumferential direction.

First, a sensor attachment / detachment device 6 used for attaching / detaching the sensor 1 installed on the ceiling C will be described. The sensor dustproof cover 100, which will be described later, is attached to and detached from the sensor 1 by the detachable device 6.
As shown in FIGS. 1 and 2, the detachable device 6 includes a bowl portion 7, a claw portion 8 forming a part of the bowl portion 7, a protrusion 8a provided on the claw portion 8, and a bowl portion 7. It is provided with a connecting portion 9 fixed to the outer surface.

The bowl portion 7 is a portion that covers the head portion 5 of the sensor 1 (sensor main body 3), and has a shape that fits into the head portion 5 with a predetermined dimensional difference.
A pair of claw portions 8 are provided so as to face each other with the head portion 5 interposed therebetween when the bowl portion 7 is covered with the head portion 5. The claw portion 8 has flexibility.
Further, when the bowl portion 7 is covered with the head portion 5, the pair of protrusions 8a provided on the pair of claw portions 8 are fitted into the opening 5a which is the uneven shape of the head portion 5. ing.
A long operation support rod (not shown) is connected to the connecting portion 9. The operation pointer rod connected to the connecting portion 9 has a length that allows the attachment / detachment device 6 to reach the ceiling C.

Then, as shown in FIG. 2, the bowl portion 7 is covered with the head portion 5, and the protrusion 8a of the claw portion 8 is fitted into the opening 5a of the head portion 5 of the sensor 1 (sensor main body 3). By rotating the detachable device 6 in one direction, the protrusion 8a of the claw portion 8 comes into contact with the opening frame 5b of the head portion 5 to rotate the sensor main body 3 and remove it from the base body 2. The sensor main body 3 can be attached to the base body 2 by rotating the detachable device 1 in another direction.

As shown in FIGS. 1 and 3, the sensor dustproof cover 100 of the present embodiment covers the bottomed cylindrical cup portion 10 that covers the head portion 5 of the sensor main body 3 and the base 4 of the sensor main body 3. It is a cover member having a bottomed annular outer ring portion 20 and a connecting portion 30 connecting the cup portion 10 and the outer ring portion 20, and has a shape corresponding to the outer shape of the sensor 1.
As shown in FIG. 3, the dustproof cover 100 for a sensor is a molded product of a resin material having a substantially hat shape in a cross-sectional view, and has flexibility. The thickness of the dustproof cover 100 for the sensor is thinly molded so as to be as light as 3 g to 5 g, for example.

The dustproof cover 100 for the sensor is made of a colored translucent resin material (resin material having light transmission).
If the dustproof cover 100 for the sensor is colorless and transparent, it may be difficult to tell at a glance whether or not the dustproof cover 100 for the sensor is attached to the sensor 1.
Further, if the dustproof cover 100 for the sensor does not have light transmission, when the operation of the sensor 1 is confirmed with the dustproof cover 100 for the sensor attached to the sensor 1, the light emitting unit of the sensor 1 ( It is not preferable because it cannot be confirmed whether or not (not shown) emits light.
Since the light emitted from the light emitting portion of the sensor 1 is red, the dustproof cover 100 for the sensor of the present embodiment is made of a translucent resin material colored in pale yellow.
When the dustproof cover 100 for a sensor is translucent and pale yellow, the red light when the light emitting portion (not shown) of the sensor 1 emits light can be suitably visually recognized.

Further, on the side surface of the cup portion 10, a convex portion 11 protruding toward the inner surface side of the dustproof cover 100 for a sensor is provided.
The convex portion 11 of the cup portion 10 is provided to engage with the opening 5a of the head portion 5 to engage the dustproof cover 10 for the detector to the sensor 1. In the present embodiment, four convex portions 11 are provided on the side surface of the cup portion 10 at equal intervals in the circumferential direction.

Further, the outer ring portion 20 is provided with a reinforcing structure portion 21 formed to maintain the three-dimensional shape of the dustproof cover 100 for a sensor. In the present embodiment, four reinforcing structure portions 21 are provided on the outer surface of the outer ring portion 20 at equal intervals in the circumferential direction.

Then, by engaging the sensor dustproof cover 100 with the sensor 1 and covering the opening 5a of the head portion 5, it is possible to prevent dust from entering the sensor 1 through the opening 5a.

Next, a procedure for removing the sensor dustproof cover 100 of the present embodiment from the sensor 1 will be described.

When removing the sensor dust cover 100 (see FIG. 3) attached to the sensor 1, the cup of the sensor dust cover 100 covering the head portion 5 of the sensor 1 as shown in FIGS. 4 and 5. The bowl portion 7 of the detachable device 6 is put on the portion 10.
At this time, as shown in FIG. 5, the edge of the bowl portion 7 of the detachable device 6 abuts on the connecting portion 30 of the dustproof cover 100 for the detector, so that the detachable device 6 is no longer close to the detector 1. Its movement is restricted. Specifically, as shown in FIG. 4, the movement of the detachable device 6 is restricted so that the protruding portion 8a of the claw portion 8 of the detachable device 6 does not reach the opening 5a of the head portion 5. That is, the connecting portion 30 of the dustproof cover 100 for the detector functions as a movement restricting portion that regulates the movement of the detaching device 6 so that the protrusion 8a of the detaching device 6 does not reach the position corresponding to the opening 5a of the head portion 5. do.
As described above, in the state where the dustproof cover 100 for the sensor is attached to the sensor 1, the protrusion 8a of the claw portion 8 of the detachable device 6 does not fit into the opening 5a of the head portion 5.
Since the pair of claws 8 is opened by the protrusion 8a of the claw 8 of the detachable device 6 not fitting into the opening 5a of the head 5, the cup 10 is closed by the action of closing the pair of claws 8. It is designed to be pinched.

Then, as described above, when the bowl portion 7 of the detachable device 6 is put on the cup portion 10 of the dustproof cover 100 for the detector that covers the head portion 5 of the detector 1, the detachable device is as shown in FIG. The pair of claw portions 8 of 6 sandwiches the cup portion 10.

In this way, when the detachable device 6 is moved in the direction away from the sensor 1 while the cup portion 10 is sandwiched between the pair of claw portions 8 of the detachable device 6, as shown in FIG. 6, the detector 1 is dustproof for the detector. The cover 100 can be removed.
That is, the holding force of the pair of claws 8 of the detachable device 6 holding the cup portion 10 is stronger than the engaging force of the convex portion 11 of the cup portion 10 being engaged with the opening 5a of the head portion 5, so that the attachment / detachment device 6 can be attached / detached. The device 6 can remove the sensor dustproof cover 100 from the sensor 1.
It should be noted that the friction between the convex portion 11 of the cup portion 10 and the head portion 5 of the sensor 1 is more than the frictional resistance force between the pair of claw portions 8 (projection portions 8a) of the detachable device 6 and the outer surface of the cup portion 10. By designing so that the resistance is small, it becomes easy to remove the dustproof cover 100 for the sensor by the detachable device 6.
Further, since the sensor dustproof cover 100 removed from the detector 1 is sandwiched between the pair of claws 8 and held by the detachable device 6, the removed sensor dustproof cover 100 can be quickly collected. ..

Next, a procedure for attaching the sensor dustproof cover 100 of the present embodiment to the sensor 1 will be described.

When the sensor dustproof cover 100 is attached to the detector 1 installed on the ceiling C, as shown in FIG. 7, the detector dustproof cover 100 is set so as to be placed on the edge of the bowl portion 7 of the detachable device 6.
Specifically, as shown in FIG. 7, a pair of protrusions 8a of the detachable device 6 are brought into contact with the bottom surface side of the cup portion 10 of the dustproof cover 100 for the detector, and the dustproof cover 100 for the detector is attached by the detachable device 6. Set to support it.
In particular, since the pair of protrusions 8a are provided at a position slightly downward from the edge of the bowl portion 7 of the detachable device 6, a part of the bottom surface side of the cup portion 10 of the dustproof cover 100 for the detector is provided. However, since it fits inside the bowl portion 7 of the detachable device 6, the posture of the dustproof cover 100 for the sensor set in the detachable device 6 is easy to be stable and can be suitably supported.

In this way, with the dustproof cover 100 for the detector supported by the detachable device 6 (see FIG. 7), the dustproof cover 100 for the detector and the detachable device 6 are brought closer to the sensor 1, and the cup portion 10 of the dustproof cover 100 for the detector is moved. When the convex portion 11 of the cup portion 10 is engaged with the opening 5a of the head portion 5 by covering the head portion 5 of the sensor 1, the dustproof cover 100 for the detector is attached to the sensor 1 as shown in FIG. be able to.

As described above, the sensor dustproof cover 100 of the present embodiment is attached to the sensor 1 by the detachable device 6 used for attaching / detaching the sensor 1 (sensor main body 3) installed on the ceiling C or the like. And can be removed, eliminating the need for a removal jig to remove the dustproof cover from the sensor as in conventional technology.
That is, the operator who attaches or removes the dustproof cover 100 for the sensor can perform a predetermined work by bringing the detacher 6 for the sensor to the work site.
Moreover, even when the work of attaching / detaching the sensor 1 (sensor main body 3) becomes necessary, the attachment / detachment device 6 is carried, so that the work of attaching / detaching the sensor 1 can also be supported.

In the above embodiment, the dustproof cover 100 for the sensor is a cover that covers the sensor 1 installed on the ceiling C, but the present invention is not limited to this, and the dustproof cover 100 is installed on the side wall. It may be a cover that covers the sensor 1.
Further, the detector 1 protected by the dustproof cover 100 for the detector is not limited to the one for smoke sensing, and may be a heat sensing detector or a flame sensing detector.

Further, in the above embodiment, the outer edge shape of the dustproof cover 100 for the detector is made substantially rectangular, but the present invention is not limited to this, and the dustproof cover 100 for the detector follows the outer ring portion 20. The outer edge shape may be substantially circular.

Further, the outer surface of the cup portion 10 of the dustproof cover 100 for the detector may be provided with irregularities such as a step or a raised portion with which the pair of protrusions 8a of the detachable device 6 are engaged. By doing so, the pair of claw portions 8 of the detachable device 6 can easily hold the cup portion 10, and the dustproof cover 100 for the sensor can be easily removed by the detachable device 6.

In addition, it goes without saying that the specific detailed structure and the like can be changed as appropriate.

1 Sensor 2 Base body 3 Sensor body 4 Base 5 Head 5a Aperture (uneven shape)
5b Opening frame 6 Detachable device 7 Bowl part 8 Claw part 8a Protrusion part 9 Connecting part 10 Cup part 11 Convex part 20 Outer ring part 21 Reinforcing structure part 30 Connecting part (movement restricting part)
100 Dustproof cover for detector C Ceiling (installation surface)

Claims (5)

A detacher used to attach and detach the detector from the detector base.
It has a bowl that can cover and engage the head of the sensor.
The bowl portion is configured to be able to cover the bottomed cylindrical cup portion of the dustproof cover for the detector, and has at least a pair of claw portions that can be fitted into the uneven shape formed on the head portion. Has a protrusion,
The claw portion is provided along the radial direction of the bowl portion, and the protrusion portion in the claw portion is provided so as to project inward along the radial direction of the bowl portion.
The claw portion sandwiches the cup portion, and the protrusion portion abuts on the cup portion and is configured to be able to support the cup portion.
A detachable device capable of attaching or detaching the dustproof cover for the sensor to the sensor. The detachable device according to claim 1, wherein the protrusions are provided on the tip end side of the claws at predetermined intervals. On the side surface of the cup portion, a convex portion is provided which engages with the uneven shape of the head portion and engages the dustproof cover for the sensor with the sensor.
The detachable device according to claim 1 or 2, wherein the protrusion is provided in a position that does not reach a position corresponding to the protrusion of the cup. On the side surface of the cup portion, a convex portion is provided which engages with the uneven shape of the head portion and engages the dustproof cover for the sensor with the sensor.
The detachable device is characterized in that the holding force of the pair of claws holding the cup portion is stronger than the engaging force in which the convex portion of the cup portion is engaged with the uneven shape of the head portion. The detachable device according to any one of claims 1 to 3. On the side surface of the cup portion, a convex portion is provided which engages with the uneven shape of the head portion and engages the dustproof cover for the sensor with the sensor.
The detachable device is characterized in that the frictional resistance force between the protrusion and the side surface of the cup portion is larger than the frictional resistance force between the convex portion of the cup portion and the head portion. The detachable device according to any one of 4.

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