JP5187887B2 - Alarm - Google Patents

Description

    The present invention relates to an alarm device that is attached to an installation surface such as a wall surface or a ceiling by an attachment pin.

Conventionally, in order to attach the alarm device to the installation surface, a pin-like object such as a mounting screw or a fixing nail has been used. As an example, the mounting plate is provided with an insertion portion that allows the fixing nail to be inserted obliquely with respect to the mounting plate, and the mounting plate is placed on the wall surface by placing the fixing nail inserted through the insertion portion on the wall surface. There is one that attaches an alarm device to a wall surface by attaching an alarm device to a mounting plate while fixing (for example, see Patent Document 1).
JP 2002-329266 A

  In the above conventional example, there is a problem that it is difficult to remove the fixing nail when the mounting plate is removed from the installation surface in order to transfer the alarm device. This has a problem in that the entire head of the fixed nail is in close contact with the insertion portion, and there is no place to grasp to remove it.

  The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to easily remove an alarm device attached to an installation surface with an attachment pin.

The present invention provides an alarm device that is attached to a desired installation surface by a mounting pin, and the alarm device is provided with an insertion portion in which an insertion hole through which the mounting pin is inserted is formed, and around the insertion hole. The first projecting portion and the second projecting portion with which the head portion of the mounting pin abuts, and the both sides of the second projecting portion are formed on both sides of the mounting pin without contacting the head portion of the mounting pin. a recess shank is exposed, is provided, wherein the first projecting portion, to Wataru so that a substantial part of the circumference of the said through hole, surrounding at least the insertion hole of the axis from one side of the insertion hole And the other side of the insertion hole is formed in a substantially square shape when viewed from the front, and the second projecting portion has a symmetrical position across the insertion hole so as to be orthogonal to the first projecting portion. It is formed in a substantially rectangular shape in front view narrower than the diameter of the insertion hole on the side

    Since the present invention is configured as described above, the following various effects can be obtained. That is, since the mounting pin head part does not come into contact with the recessed part where the shaft part of the mounting pin is exposed, a flat head screwdriver or the like is inserted into the recessed part when the alarm is removed, and the shaft part of the mounting pin is inserted. The contact state between the head portion of the mounting pin and the projecting portion can be released by pressing and twisting, and the mounting pin can be easily pulled out, and the alarm device can be easily removed from the installation surface. Further, since the projecting portion covers the shaft portion of the mounting pin as much as possible, the stability in the mounted state is improved.

    As a result of repeated research and experiments for solving the above problems, the present inventor has found that the following may be performed. That is, the alarm device is provided with an insertion portion in which an insertion hole for inserting the mounting pin is formed, and a protruding portion where the head of the mounting pin abuts and the head of the mounting pin abuts around the insertion hole. And a recess in which the shaft portion of the mounting pin is exposed, and a protruding portion is provided over most of the periphery of the insertion hole. According to this configuration, since the concave portion where the shaft portion of the mounting pin is exposed without contacting the head portion of the mounting pin is provided, when removing the alarm device, a minus driver or the like is inserted into the concave portion, The mounting pin can be easily pulled out by pressing the mounting pin shaft and twisting, etc. to release the contact state between the mounting pin head and the protruding part. Can be removed. In addition, the structure in which the shaft portion of the mounting pin is covered as much as possible by the projecting portion improves the stability in the mounted state.

    Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 is a cross-sectional view of a fire alarm showing Embodiment 1 of the present invention, FIG. 2 is a front perspective view of an attachment member, FIG. 3 is an enlarged perspective view of an insertion portion, and FIG. 4 is an enlarged front view of the insertion portion.

    A fire alarm device 1 as an example of an alarm device includes a housing including an alarm device body 5 and an attachment member 2. The attachment member 2 as an example of the attachment portion is formed in a disk shape as shown in FIGS. As shown in FIG. 1, the mounting member 2 is fixed to the installation surface of a general house, for example, the surface of a gypsum board 3, which is a wall surface, by a plurality of mounting pins 4 (only one is shown in FIG. 1). Yes. And after fixing the attachment member 2 as shown in FIG. 1, the alarm main body 5 is attached as shown by an imaginary line (two-dot chain line) from the left side, and the attachment of the fire alarm 1 is completed.

  The mounting member 2 is formed by molding a synthetic resin. An annular frame portion 8 is provided on the outer surface of the substantially disc-shaped bottom plate 7, and a blade is disposed at a relative position in the radial direction inside the frame portion 8. An annular part 10 in which the receiving part 9 is formed is provided, and a plurality of insertion parts 11 are projected on the inner side of the annular part 10. In the present embodiment, two insertion portions 11 are provided at substantially the relative positions in the radial direction and one inside, but the attachment pins 4 are obliquely crossed with respect to the attachment member 2 in different directions. Therefore, the arrangement position may be other than that, and the number thereof may be other required number.

  As shown in FIGS. 1 to 4, the insertion portion 11 has a substantially triangular cross section that increases toward the outside of the attachment member 2, and the insertion hole 11 a through which the shaft portion 4 b of the attachment pin 4 is inserted is the attachment member 2. It is formed so as to reach the back of the.

    In the upper part of the insertion part 11, the 1st protrusion part 11b and the 2nd protrusion part 11c which the head 4a of the attachment pin 4 contact | abut when the insertion of the attachment pin 4 is completed are provided around the insertion hole 11a. The contact surface formed by them is formed so as to be orthogonal to the insertion hole 11a. As shown in FIG. 4, the first projecting portion 11 b is located in the inner direction of the mounting member 2 and surrounds at least the axis Y of the insertion hole 11 a from one side X of the insertion hole 11 a and the other side of the insertion hole 11 a. It has a substantially square shape in front view provided across the Z direction, and the second projecting portion 11c is located on the outer side of the mounting member 2 and is formed of the insertion hole 11a provided on the other side Z of the insertion hole. It is a substantially rectangular shape in front view narrower than the diameter. Since the protruding portions 11b and 11c are provided over most of the periphery of the insertion hole 11a, for example, more than half, the structure is such that the shaft portion 4b of the mounting pin 4 is covered as much as possible, and is attached to the gypsum board 3 The stability at is improved. Further, the projecting portions 11b and 11c are provided at symmetrical positions across the diameter of the insertion hole 11a, specifically, symmetrical positions on a straight line passing through the one side X, the axis Y, and the other side Z of the insertion hole 11a. In addition, since the projecting portion 11b is provided at a symmetrical position on the straight line that passes through the axis Y perpendicular to the straight line, that is, the projecting portion is provided on the four sides of the insertion hole 11a. The one side of 4 head 4a is prevented, and the contact state to projection parts 11b and 11c is stabilized.

    Furthermore, in the upper part of the insertion part 11, the 1st recessed part 11d and the 2nd recessed part 11e which the axial part 4b of the attachment pin 4 exposes without the head part 4a of the attachment pin 4 contacting the periphery of the insertion hole 11a, Is provided. 11 d of 1st recessed parts and the 2nd recessed part 11e are located in the outer side direction of the attachment member 2, and are substantially rectangular shapes by the front view which were recessedly provided between the 1st protrusion part 11b and the 2nd protrusion part 11c. When the fire alarm 1 is removed, a flathead screwdriver or the like can be inserted into the recesses 11d and 11e and pressed against the shaft portion 4b of the mounting pin 4 to be twisted. Since the contact state between the head portion 4a and the projecting portions 11b and 11c can be released and the attachment pin 4 can be easily pulled out, the attachment member 2 can be easily removed from the installation surface.

    The insertion holes 11a of the three insertion portions 11 are substantially C-shaped so that the crossing angles with the back surface of the attachment member 2 are each 60 ° (see FIG. 1) and toward the radially outer side of the attachment member 2. It is formed in a shape. Since the driving directions of the three mounting pins 4 to the gypsum board 3 are different from each other, the mounting member 2 is restricted from moving in the pulling direction of the mounting pins 4 (left side in FIG. 1), and external force is applied to the fire alarm 1. However, the fire alarm 1 does not fall off from the gypsum board 3.

  As shown in FIGS. 1 and 4 (indicated by phantom lines in FIG. 4), the mounting pin 4 includes a shaft portion 4b that passes through the insertion hole 11b, and a contact surface between the protruding portions 11b and 11c when the insertion is completed. And a head portion 11a that abuts the head. The shaft portion 4b has a pointed shape with a diameter of about 1.0 mm, and the head portion 11a is formed in a substantially cylindrical shape having a size that can be easily pressed by a finger, for example.

  As shown by an imaginary line in FIG. 1, the alarm device main body 5 has a substantially tapered outer shape, and a fire detection unit, a circuit board, and the like are accommodated therein. In addition, two blade portions (not shown) are provided at the radially inner relative positions on the inner peripheral edge of the back surface. The alarm device main body 5 is attached to the attachment member 2 by engaging a blade portion (not shown) with the blade receiving portion 9 of the attachment member 2.

    When fixing the mounting member 2 to the gypsum board 3, the mounting member 2 is applied to a position where the gypsum board 3 is to be fixed. Next, the head portion 4a of the mounting pin 4 is picked with fingers, and the shaft portion 4b is moved until the head portion 4a comes into contact with the contact surfaces of the projecting portions 11b and 11c of the insertion portion 11 as shown in FIG. The mounting pin 4 is pushed into the gypsum board 3 through the insertion hole 11a. At this time, a tool may be used. This pushing operation is performed on each mounting pin 4 to fix the mounting member 2 to the gypsum board 3. Finally, the alarm device body 5 is applied from the left side of the mounting member 2, the alarm device body 5 is rotated using the annular portion 10 as a guide, and the blade portion (not shown) of the alarm device body 5 is attached to the mounting member 2. The alarm body 5 is attached by engaging with the blade receiving portion 9. The fire alarm device 1 can be fixed to a wall surface or the like by inserting the mounting pin 4 into the insertion hole 11a, pressing it with fingers and pushing it into the gypsum board 3. Therefore, the fixing work to the wall surface or the like can be easily performed.

  Although not described in detail in the attachment member 2, as shown in FIG. 2, a dharma hole is provided in the upper part and a long hole is provided in the lower part. It can be fixed to the installation surface by screwing.

  And when it becomes necessary to move the fire alarm 5, the alarm body 5 is grasped from the left side of the mounting member 2, and the alarm body 5 is moved in the direction opposite to the above-described direction using the annular portion 10 as a guide. By rotating, the engagement between the blade portion (not shown) of the alarm device body 5 and the blade receiving portion 9 of the attachment member 2 is released, and the alarm device body 5 is removed from the attachment member 2. Next, a flathead screwdriver or the like is inserted into the recesses 11d and 11e, and the head 4a of the mounting pin 4 is moved to the left in FIG. The contact state between the head 4a of the mounting pin 4 and the protruding portions 11b and 11c is released. Finally, holding the head 4 a with fingers or the like, the shaft portion 4 b of the mounting pin 4 is taken out from the insertion hole 11 a, and the mounting member 2 is removed from the gypsum board 3.

    In the embodiment of the present invention, as the shape of the insertion portion 11, it is only necessary that the protruding portion is provided over most of the periphery of the insertion hole 11a, for example, more than half, for example, the second protruding portion 11c is formed. It is good also as deleting and it is good only as the 1st protrusion part 11b. Further, for example, the projecting portion surrounds at least the axis Y of the insertion hole 11a from one side X of the insertion hole 11a and does not include the other side Z of the insertion hole 11a. It is good also as a 3rd recessed part provided in the other side of the insertion hole 11a on the other hand as a 3rd protrusion part provided over the direction. At this time, as the third projecting portion, the first projecting portion 11b, the first concave portion 11d and the second concave portion 11e are formed as one continuous projecting portion. As the third concave portion, The part of the 2nd protrusion part 11c is formed in the recessed part.

  Further, in the embodiment of the present invention, the alarm main body 5 and the mounting member 2 are configured as separate bodies as the casing of the fire alarm 1, but are configured integrally, and the mounting portion is provided on, for example, a side surface of the casing. You may make it provide.

  In the embodiment of the present invention, the fire alarm 1 is used as the alarm, but other alarms such as a gas leak alarm may be used.

It is sectional drawing of the fire alarm which shows Example 1 of this invention. FIG. 2 is a front perspective view of the mounting member. It is an expansion perspective view of an insertion part. It is an enlarged front view of an insertion part.

Explanation of symbols

1 fire alarm, 2 mounting member, 3 gypsum board (installation surface), 4 mounting pin, 4a head, 4b shaft, 5 alarm body, 7 bottom plate, 8 frame, 9 blade support, 10 ring , 11 Insertion part, 11a Insertion hole, 11b 1st protrusion part, 11c 2nd protrusion part, 11d 1st recessed part, 11e 2nd recessed part, One side of X insertion hole, Axis center of Y insertion hole, Z insertion hole The other side.

Claims (1)

In the alarm device that is attached to the desired installation surface with a mounting pin,
The alarm device is provided with an insertion portion in which an insertion hole through which the attachment pin is inserted is formed, and a first projecting portion and a second projection portion around which the head of the attachment pin abuts are provided around the insertion hole . A projecting portion and a recess formed on both sides of the second projecting portion so that the shaft portion of the mounting pin is exposed without contacting the head of the mounting pin;
Front the first projecting portion, the insertion to Wataru so that a substantial part of the circumference of the hole, across the other side direction of the insertion hole surrounding the axis of at least the insertion hole from one side of the insertion hole Formed in a substantially square shape,
The second projecting portion is formed in a substantially rectangular shape in front view narrower than the diameter of the insertion hole on the other side of the symmetrical position across the insertion hole so as to be orthogonal to the first projecting portion. An alarm device characterized by