JP7459366B1 - fixed clamp - Google Patents

Abstract

[Problem] To obtain a fixing clamp for a mounted device that does not damage the fixture, has good installation workability, is compatible with fixtures of various sizes, and does not spoil the aesthetics. [Solution] The fixing clamp comprises a pair of clamping pieces that clamp the fixture, a pair of bolts that move each of the pair of clamping pieces in a direction toward and away from each other, a pair of arms having bolt accommodating portions at their tip ends into which the pair of bolts are screwed, rail portions provided on the base ends of each of the pair of arms and extending in a direction intersecting the arms, an engagement portion that slidably supports the pair of opposing rail portions, and a mounting surface provided on the surface of the engagement portion opposite the surface that supports the pair of rail portions, and on which the mounted device is mounted. [Selected Figure] Figure 1

Description

The present invention relates to a fixing clamp for fixing fire detectors, electrical equipment, etc. to fittings.

Buildings are required to install fire detectors to detect fire. Furthermore, electrical equipment such as monitoring equipment, emergency lights, speakers, and security sensors for the purpose of crime prevention or disaster prevention are often installed in buildings. When installing such a fire detector or electrical device in a building, it is common to fasten the fire detector or electrical device with screws. However, if the fire detector is fixed to the ceiling or wall with screws, the construction surface such as the ceiling or wall will be damaged. There is a particular need to avoid such damage to important cultural properties or historical buildings.

As a fire alarm that can be installed and removed without damaging the construction surface, it has a pair of clamping pieces that clamp the fittings, a support part that supports the clamping pieces in a movable manner, and a fixed part that restricts the movement of the clamping pieces. A fire alarm equipped with the following has been proposed (for example, see Patent Document 1). In Patent Document 1, one of the clamping pieces is provided with a T-shaped protruding engagement part, and this engagement part is movably engaged with a groove formed in the support part. Then, the clamping piece provided with the engaging portion is brought closer to the fixed clamping piece, so that the fixture is clamped between the clamping pieces. Furthermore, a fixing piece is brought into contact with the outside of the clamping piece provided with the engaging part, and this fixing piece is screwed with a threaded part.

Japanese Patent Application Publication No. 2010-102451

The fire alarm described in Patent Document 1 has a structure in which fittings are sandwiched between a fixed clamping piece and the other clamping piece is moved along a support portion. For this reason, it has been difficult to balance the force that the clamping piece applies to the fixture when the fixture is clamped, and the force that the clamping piece applies to the fixture. Therefore, problems may occur, such as damaging the fittings by pinching them with excessive force, causing the fire alarm to fall due to insufficient force to pinch the fittings, or causing the fire alarm to tilt due to an imbalance of force. was there. In order to install a fire alarm in a manner that prevents such problems from occurring, skill in the work or fine adjustment of the work is required, and improvements in work efficiency have been desired.

Furthermore, the dimensions of fittings such as ceilings or walls to which the device is attached are not uniform. Particularly in important cultural properties or historical buildings, the dimensions of fittings are not standardized and vary in size. When attempting to attach equipment such as fire detectors or electrical equipment to fittings of various sizes using the fixing means described in Patent Document 1, the length of the support part must be adjusted to match the fitting of the maximum size. It is necessary to manufacture the set fixing means. However, if the length of the support part is matched to the largest fitting, the long support part that protrudes outside the clamping piece will be exposed when it is attached to a small fitting, which will spoil the aesthetic appearance.

The present invention has been made in view of the above-mentioned circumstances, and provides a fixing clamp for a device to be attached, which has good installation workability, is compatible with fittings of various sizes, and does not easily spoil the aesthetic appearance.

The fixing clamp according to the present invention includes a pair of clamping pieces that clamp a fitting, a pair of bolts that move each of the pair of clamping pieces toward and away from each other, and a bolt into which the pair of bolts are respectively screwed. A pair of arms having a housing portion on the distal end side, a rail portion provided at the base end side of each of the pair of arms and extending in a direction intersecting the arms, and a pair of the rail portions arranged opposite to each other are slidable. The device includes an engaging portion for supporting, and a mounting surface provided on a surface of the engaging portion opposite to a surface supporting the pair of rail portions and to which a device to be attached is attached.

According to the fixing clamp of the present invention, it is possible to improve workability when attaching a device to be attached to a fixture to which it is attached. Further, the fixing clamp of the present invention can be adapted to fittings of various sizes, and does not impair the aesthetic appearance.

FIG. 3 is an exploded perspective view of the fixing clamp according to the embodiment. FIG. 2 is a perspective view of a fixing clamp according to an embodiment. FIG. 2 is a perspective view of a fixed clamp according to an embodiment. FIG. 3 is a diagram illustrating a manner in which a device to be attached is attached using a fixed clamp in a minimum width state according to an embodiment. FIG. 3 is a diagram illustrating a manner in which a device to be attached is attached using a fixed clamp in a maximum width state according to an embodiment.

Embodiments of the fixing clamp according to the present invention will be described below with reference to the drawings. The present invention is not limited to the following embodiments, and can be variously modified without departing from the spirit of the present invention. In addition, in the following explanation, terms indicating directions (for example, "upper", "lower", "right", "left", "front", "rear", etc.) are used as appropriate to facilitate understanding. These are for illustrative purposes only and are not intended to limit the invention. Furthermore, in each figure, the same reference numerals are the same or equivalent, and this is common throughout the entire specification. Note that in each drawing, the relative dimensional relationship or shape of each component may differ from the actual one.

Embodiment.
FIG. 1 is an exploded perspective view of a fixed clamp 100 according to an embodiment. 2 and 3 are perspective views of the fixed clamp 100 according to the embodiment. In FIGS. 1 to 3 and figures to be described later, arrows indicating mutually orthogonal X, Y, and Z directions are shown to indicate the correspondence of the directions in each figure. The fixing clamp 100 is a device used when attaching devices such as fire detectors, surveillance cameras, emergency lights, speakers, security sensors, switches, and electrical wiring to buildings.

As shown in FIG. 1, the fixed clamp 100 includes a base portion 101 and a pair of slide portions 102 that are movable relative to the base portion 101. The two slide portions 102 have the same structure and are arranged symmetrically in the X direction.

(Base part)
The base portion 101 supports the two slide portions 102 and also supports the attached device. The base portion 101 has an engaging portion 10, a pedestal 11, a groove portion 12, a fixing hole 13, a center mark 14, and a mounting surface 15.

The engaging portion 10 is a long member with which the rail portion 6 of the slide portion 102 is engaged. A pedestal 11 that protrudes outward in the lateral direction of the engaging portion 10 is provided on a surface parallel to the XZ plane of the engaging portion 10. The pedestal 11 constitutes a part of the mounting surface 15 to which an attached device is attached, and also restricts the sliding movement of the slide portion 102 toward the center of the base portion 101 in the X direction. The pedestal 11 may be provided with an opening through which electrical wiring extending from the device to be attached passes, and this makes it easier to route the electrical wiring.

The groove portion 12 is a groove for determining the amount of sliding movement of the sliding portion 102. The groove portion 12 is composed of multiple grooves. The multiple grooves are arranged along the sliding direction of the sliding portion 102, i.e., the X direction. Each of the grooves constituting the groove portion 12 extends in the Z direction, i.e., in a direction perpendicular to the sliding direction of the sliding portion 102. In FIG. 1, only the groove portion 12 provided on the left side of the engagement portion 10 on the page is shown, but a groove portion 12 is also provided on the surface of the engagement portion 10 on the far right side of the page.

The fixing hole 13 is a hole into which a screw 20 for fixing the base portion 101 and the slide portion 102 is inserted. The fixing hole 13 penetrates the engaging portion 10 in the Z direction.

Center mark 14 indicates the center of base portion 101 in the X direction. Although the center mark 14 is a protrusion provided on the side surface of the base 11 in this embodiment, it may be a groove or a printed or engraved line. The center mark 14 is used for positioning the fixed clamp 100 and fittings.

The mounting surface 15 is a flat surface on which a device to be mounted is mounted. The mounting surface 15 is a flush surface formed by the engaging portion 10 and the pedestal 11. The mounting surface 15 is a surface (the surface on the lower side of the paper in FIG. 1) opposite to the surface on which the engaging portion 10 supports the rail portion 6 (the surface on the upper side in the paper in FIG. 1).

(Slide section)
The pair of slide parts 102 are members for clamping a fixture. Each slide part 102 includes a clamping piece 1, a bolt 2, an arm 3, a bolt receiving part 4 provided on the arm 3, a base part 5, a rail part 6, and a cover 7.

The clamping piece 1 is a member that clamps fittings such as pillars or rod frames. In this embodiment, the clamping piece 1 is cylindrical or disk-shaped and has no corners on the outer periphery, so that the edges of the clamping piece 1 are unlikely to leave marks on the fitting when it is clamped. The shape of the clamping piece 1 is not limited to a cylindrical or disk-shaped shape, and may be a polygonal column. The clamping piece 1 is preferably made of a material that has cushioning or elasticity, such as silicone. This makes it less likely that the fitting will be scratched when it is clamped between the pair of clamping pieces 1.

The cover 7 covers at least the opposing surfaces of the pair of clamping pieces 1 . The cover 7 is made of a cushioning or elastic material such as silicone. By attaching the cover 7 made of such an elastic body to the clamping pieces 1, when the fittings are sandwiched between the pair of clamping pieces 1, it becomes difficult to damage the fittings. Moreover, since the cover 7, which is detachable from the clamping piece 1, can be replaced if it deteriorates, the performance of the fixed clamp 100 can be maintained over a long period of time. The thickness of the cover 7 can be about 0.5 mm to 3 mm, for example about 2 mm, but is not limited to this specific value. Note that the cover 7 may not be provided. Moreover, although the cover 7 is illustrated in FIG. 1, illustration of the cover 7 is omitted in figures other than FIG. 1.

The surfaces of the pair of clamping pieces 1 and the pair of covers 7 facing each other may be flat or may have irregularities. By providing such irregularities, the frictional force between the pair of clamping pieces 1 and the pair of covers 7 and the fittings can be improved, and misalignment of the pair of clamping pieces 1 or the pair of covers 7 with respect to the fittings can be suppressed.

The bolt 2 is inserted into the bolt housing 4 formed in the arm 3, and moves the clamping piece 1 in a direction toward and away from the other clamping piece 1. The tip of the bolt 2 and the clamping piece 1 may be connected by welding or the like, or may be integrally molded. In addition, the clamping piece 1 and the bolt 2 may be connected by screwing the bolt 2 into a screw hole 1a provided in the clamping piece 1.

The operator moves the bolt 2 by grasping the head of the bolt 2 and rotating it clockwise or counterclockwise. The head of the bolt 2 may be removable from the shaft of the bolt 2.

The arm 3 is a member having a bolt accommodating portion 4 into which the bolt 2 is screwed. Arm 3 extends along the Z direction. A bolt accommodating portion 4 is formed at the tip of the arm 3, and a base portion 5 is provided at the base end of the arm 3.

The bolt accommodating portion 4 is a hole into which the bolt 2 is inserted. The inner surface of the bolt accommodating portion 4 is provided with a thread groove into which the bolt 2 is screwed. The inner diameter of the bolt accommodating portion 4 may be uniform along the X direction, but the inner diameter of a portion farther from the base portion 101 in the X direction may be larger than the inner diameter of a portion close to the base portion 101. By doing so, the head of the bolt 2 can be accommodated in a portion with a large inner diameter.

The base portion 5 supports the base end of the arm 3 and also supports the rail portion 6. The base portion 5 extends from the base end of the arm 3 along the sliding direction (X direction) of the slide portion 102.

The rail portion 6 slidably engages with the engaging portion 10 of the base portion 101. The rail portion 6 is a U-shaped member in cross section that opens downward in the plane of the drawing in FIG. 1, and extends along the X direction. The engaging part 10 is disposed in the U-shaped recess of the rail part 6, and the rail part 6 moves along the engaging part 10.

A protrusion 6 a is provided on the inner surface of the rail portion 6 facing the engaging portion 10 . The protrusion 6 a fits into one of the plurality of grooves forming the groove part 12 in a state where the rail part 6 is engaged with the engaging part 10 . When the slide part 102 is pressed or pulled against the base part 101, the projections 6a climb over the peaks between the grooves of the groove part 12 one by one, and the slide part 102 moves. The operator moves each of the pair of slide parts 102 by the same number of grooves of the groove part 12 with respect to the base part 101, thereby moving the pair of slide parts 102 at equal distances from the center of the base part 101 in the X direction. 102 can be arranged.

The rail portion 6 is provided with a long hole 6b that penetrates the rail portion 6 in the Z direction. The elongated hole 6b is formed so that the sliding direction of the rail portion 6, that is, the X direction, and the long axis coincide with each other. In a state where the rail portion 6 is engaged with the engaging portion 10, a portion of the elongated hole 6b is arranged at a position overlapping with the fixing hole 13. In this state, the screw 20 is inserted into the fixing hole 13, and the tip of the screw 20 is locked to the edge of the elongated hole 6b. In addition, although this embodiment shows an example in which two elongated holes 6b are lined up along the X direction in the rail portion 6, the number of elongated holes 6b may be one or three or more.

The arm 3, base 5, rail section 6, and base section 101 are preferably made of synthetic resin or aluminum, more preferably flame-retardant synthetic resin. Since synthetic resin and aluminum are lighter than iron, they can reduce the load on the fittings when the fixing clamp 100 is attached to the fittings. Therefore, damage to fittings can be suppressed. Further, the arm 3, the base 5, the rail portion 6, and the base portion 101 may be provided with lightening. By providing the lightening in this way, the weight of the fixed clamp 100 can be reduced, so that the effect of suppressing damage to the fittings can be enhanced. Further, by reducing the weight of the fixed clamp 100, it is possible to suppress the equipment to be attached to the fixed clamp 100 from falling. More preferably, the arm 3, base 5, rail section 6, and base section 101 are made of a material that meets the requirements of the UL94 standard regarding flame retardancy. Further, a reinforcing plate made of metal such as aluminum may be inserted into the arm 3, base 5, rail portion 6, and base portion 101 made of synthetic resin.

(Fixing the base part and rail part)
In the fixed clamp 100 of this embodiment, the distance between the pair of clamping pieces 1 can be adjusted by adjusting the position of the pair of sliding parts 102 with respect to the base part 101. Thereby, fittings of various sizes can be held between the pair of holding pieces 1. Hereinafter, the work of fixing the base part 101 and the slide part 102 by an operator will be explained.

As shown in FIG. 1, in a state where the base part 101 and the slide part 102 are separated, the operator places the tip of the rail part 6 over the tip of the engagement part 10 and moves the pair of slide parts 102 closer to each other. Press in the direction to move. When the distance between the pair of clamping pieces 1 becomes a distance suitable for the dimensions of the fittings to be clamped, the movement is stopped. At this time, a part of the elongated hole 6b is arranged at a position overlapping with the fixing hole 13. Next, the operator inserts the screw 20 into the fixing hole 13 from the mounting surface 15 side, and screws the screw at the tip of the screw 20 into the elongated hole 6b. Then, the pair of slide parts 102 are fixed to the base part 101 with the screws 20.

In this embodiment, as the slide portion 102 moves, the projections 6a are repeatedly fitted into the multiple grooves that make up the groove portion 12, and the projections 6a overcome the ridges between the grooves. The vibrations that occur during this process can be sensed by the operator from the base portion 101 and the slide portion 102. Therefore, by matching the amount of movement of one slide portion 102, i.e., the number of grooves that have been moved, with the amount of movement of the other slide portion 102, it is possible to improve the ease of arranging a pair of slide portions 102 at equal positions relative to the center of the base portion 101 in the X direction.

(Mounting method of attached equipment using fixed clamp)
FIG. 4 is a diagram illustrating a manner in which a device to be attached is attached by the fixed clamp 100 in the minimum width state according to the embodiment. Additionally, a spot-type fire detector 30 and fittings 31, which are examples of installed equipment, are also illustrated. As shown in FIG. 4, a fire detector 30 is attached below the mounting surface 15 of the fixed clamp 100. Although FIG. 4 shows a state in which the fire detector 30 is attached to the fixed clamp 100, the fire detector 30 may be attached to the fixed clamp 100 after the fixed clamp 100 is fixed to the fittings 31. .

The worker adjusts the amount of sliding movement of the rail portion 6 as described above according to the length of the fitting 31 in the X direction. As shown in FIG. 4, the position of the sliding portion 102 is determined so that there is a distance between the fitting 31 and the clamping piece 1. However, this distance must be less than the distance that the clamping piece 1 moves due to the bolt 2. FIG. 4 shows the fixed clamp 100 in the minimum width state where the pair of rail portions 6 are closest to each other. The center alignment of the fitting 31 and the fixed clamp 100 in the X direction can be performed using the center mark 14.

The worker rotates the heads of the pair of bolts 2. This causes the pair of clamping pieces 1 to approach each other as shown by the arrows in Figure 4. As the heads of the bolts 2 are rotated, they gradually enter the bolt housing 4 (see Figure 1) formed in the arms 3. Then, in the final stage of tightening, the bolts 2 may be tightened using a wrench (not shown). Furthermore, a hole may be provided in the bolts 2 that extends from the heads to the middle of the shaft, and a highly rigid core material such as a nail may be inserted into this hole, thereby increasing the strength of the bolts 2.

FIG. 5 is a diagram illustrating a manner in which a device to be attached is attached by the fixed clamp 100 in the maximum width state according to the embodiment. FIG. 5 shows the fixed clamp 100 in the maximum width state where the pair of rail portions 6 are farthest apart. By using the fixed clamp 100 in the maximum width state, the fire detector 30 can be attached to a fitting 31 having a width larger than that of the fitting 31 shown in FIG. 4 . Even when the fixed clamp 100 in the maximum width state is used, the operation of clamping the fitting 31 between the pair of clamping pieces 1 by tightening the bolt 2 is the same as the operation described in FIG. 4.

As described above, in the fixing clamp 100 of this embodiment, the fitting 31 is held between the pair of clamping pieces 1, so that the fitting 31 is not damaged. In addition, since both of the pair of clamping pieces 1 are moved to clamp the fitting 31, the force applied from one clamping piece 1 to the fitting 31 and the force applied to the fitting 31 from the other clamping piece 1 are balanced. Cheap. Therefore, problems related to installation can be avoided, such as damaging the fittings 31 by pinching them with excessive force, causing the attached equipment to fall due to insufficient force to pinch the fittings 31, or causing the attached equipment to tilt due to unbalanced force. Easy to avoid. In this way, according to the present embodiment, it is possible to improve the workability when attaching the attached device to the fitting 31 without damaging the fitting 31.

Furthermore, the fixed clamp 100 of this embodiment moves the pair of slide parts 102 with respect to the base part 101. Therefore, when the fixed clamp 100 is in the minimum width state and the maximum width state, the member does not protrude only in one direction in the width direction (X direction in the embodiment). Therefore, a phenomenon in which a long member protrudes as occurs in Patent Document 1 does not occur, and the aesthetic appearance is less likely to be impaired.

Further, according to the present embodiment, the mounting surface 15 and the engaging portion 10 are provided with a fixing hole 13 that penetrates in a direction intersecting the sliding direction of the pair of rail portions 6 and into which the screw 20 is inserted. There is. The tip of the screw 20 inserted into the fixing hole 13 is locked to the pair of rail parts 6. Therefore, the rail portion 6 and the engaging portion 10 can be more firmly fixed.

Further, in this embodiment, the rail portion 6 is provided with an elongated hole 6b formed such that the sliding direction of the rail portion 6 and the long axis coincide with each other, and the screw 20 inserted into the fixing hole 13 is The tip of the slot 6b is locked to the edge of the elongated hole 6b. By setting the fixing point of the screw 20 to the edge of the elongated hole 6b provided in the rail portion 6, the degree of freedom in positioning the screw 20 with respect to the elongated hole 6b is increased, making it easier to work when fixing the screw 20. will improve. Note that although the rail portion 6 and the engaging portion 10 can be more firmly fixed with the screw 20, the screw 20 may not be provided.

In addition, in this embodiment, the engaging portion 10 is provided with a groove portion 12 consisting of multiple grooves arranged along the sliding direction of the rail portion 6, and the rail portion 6 is provided with a protrusion 6a that engages with the groove of the groove portion 12. The rail portion 6 and the engaging portion 10 are positioned by fitting the protrusion 6a into the groove. This improves the workability when arranging a pair of slide portions 102 at equal positions relative to the center of the width direction (X direction in this embodiment) of the base portion 101. Note that multiple grooves may be provided in the rail portion 6, and a protrusion that fits into the groove may be provided in the engaging portion 10.

1 holding piece, 1a screw hole, 2 bolt, 3 arm, 4 bolt accommodating part, 5 base, 6 rail part, 6a protrusion, 6b oblong hole, 7 cover, 10 engaging part, 11 pedestal, 12 groove part, 13 fixing hole , 14 Center mark, 15 Mounting surface, 20 Screw, 30 Fire detector, 31 Fittings, 100 Fixed clamp, 101 Base part, 102 Slide part.

Claims (4)

a pair of clamping pieces that clamp the fittings;
a pair of bolts that move each of the pair of clamping pieces toward and away from each other;
a pair of arms each having a bolt accommodating portion on its tip side into which the pair of bolts are respectively screwed;
a rail portion provided on the base end side of each of the pair of arms and extending in a direction intersecting the arms;
an engaging part that slidably supports the pair of opposing rail parts;
A fixed clamp comprising: a mounting surface provided on a surface of the engaging portion opposite to a surface supporting the pair of rail portions, and to which a device to be mounted is attached. The mounting surface and the engaging portion are provided with fixing holes that penetrate in a direction intersecting a sliding direction of the pair of rail portions and into which screws are inserted,
The fixing clamp according to claim 1 , wherein tip portions of the screws inserted into the fixing holes are engaged with the pair of rail portions. The rail part is provided with an elongated hole formed so that the sliding direction of the rail part and the long axis coincide with each other,
The fixing clamp according to claim 2, wherein a tip of the screw inserted into the fixing hole is locked to an edge of the elongated hole. One of the rail part and the engaging part is provided with a plurality of grooves arranged along the sliding direction of the rail part, and the other is provided with a protrusion that fits into the groove, The fixed clamp according to any one of claims 1 to 3, wherein the rail portion and the engaging portion are positioned by fitting the protrusion into the groove.

Images