JP5217248B2 - Fastening tool - Google Patents

Description

  The present invention relates to a hanging metal fitting used for fastening an electric cable or washer to a ceiling, wall surface, floor surface of concrete or the like, or to suspend or fix a lightweight object below the ceiling concrete or the like. Related to fasteners.

  In general, in order to suspend lightweight objects on ceiling concrete for air conditioning construction work, etc., firstly fasten a fastener (commonly known as a Z bracket) to the ceiling concrete, and screw all the screw bolts onto this fastener. It is practiced to suspend a lightweight object on all screw bolts. Then, when fixing the fastener to the concrete on the ceiling, a hole is made in the fastener in advance, a pin is driven with a nailing machine aiming at the hole, and the fastener is fixed with the pin.

  However, it is very difficult to drive a pin aiming at the hole with a nailing machine from the bottom to the ceiling with a metal fitting with a hole.

  Therefore, in order to facilitate the aiming of the hole, a synthetic resin guide is attached to the hole portion of the metal fitting, and a receiving groove for accommodating the arcuate tip of the nailing machine is formed around the hole in this guide. A technique is known in which the tip of a nailing machine is engaged and held on the inner and outer groove walls of the receiving groove, and the tip is driven into a correct position in a stable state (Patent Document 1). reference).

In addition, a disc-shaped guide made of synthetic resin having elasticity is attached to the hole of the metal fitting, and the cylindrical portion at the tip of the nailing machine is fitted and held from the outside of the disc-shaped guide. A technique of driving in is also known (see Patent Document 2).
European Patent Publication No. 15538345 US Pat. No. 7,093,338

  However, both of the above-described techniques have a problem in that when a fastener such as a pin is driven, a resin guide is sandwiched between the fastener and the fastener, resulting in an obstacle, and the amount of fastener penetration is reduced. There is.

  In addition, since the bottom surface of the fastener is flat, in the case of a fastener that contacts the concrete surface over the entire bottom surface, the concrete surface is small but uneven, so it is unstable when in contact and tilted. There was a problem that it was easy.

  In view of the above problems, the present invention provides a fastener that is securely held by the nose portion at the tip of the nailing machine, can guide the driving of fasteners well, and can be firmly fixed to ceiling concrete or the like. The issue is to provide.

In order to solve the above-mentioned problem, the invention according to claim 1 is a fastening tool fixed to a driven material by a fastener driven out from a nose portion of a nailing machine, and an insertion hole through which the fastener is inserted, A guide member is provided for guiding the fastener by being inserted inside the nose portion. The guide member includes a guide shaft portion having one end fixed to the insertion hole, and a guide shaft portion from the other end side of the guide shaft portion. A guide blade having flexibility and formed radially, and a diameter of a circle connecting the tips of the guide blade is made larger than an inner diameter of a nose portion of the nailing machine, and the clasp is a nail Fastening driven by a nailing machine having a double structure of an outer nose portion provided so as to be movable relative to the nailing machine body and an inner nose portion fixed to the nailing machine body. Tool The diameter of the circle connecting the tips of the guide vanes is larger than the inner diameter of the outer nose portion of the nailing machine, and a plurality of guide pieces are formed on the outer peripheral surface of the guide shaft portion. The diameter of the circle connecting the tips is made smaller than the inner diameter of the outer nose portion .

The invention according to claim 2 is characterized in that, in claim 1 , a guide hole 10 for guiding a fastener driven out from the nailing machine is formed in the center of the guide shaft portion.

According to a third aspect of the present invention, in the first or second aspect , the guide piece is formed between the adjacent guide blades.

According to a fourth aspect of the present invention, in the first aspect, a plurality of anti-rotation protrusions are formed on a surface that comes into contact with the driven material when the fixed material is fixed to the driven material . A plurality of protrusions provided in the vicinity of the fastener insertion hole and a plurality of protrusions provided at positions away from the fastener insertion hole .

According to a fifth aspect of the present invention, in the fourth aspect , the plurality of protrusions provided in the vicinity of the fastener insertion hole and the plurality of protrusions provided at positions away from the fastener insertion hole are the fastener insertion hole. It is characterized by being arranged on the opposite sides with respect to each other.

  According to the first aspect of the present invention, the guide member of the fastener has a guide shaft portion, one end of which is fixed to the insertion hole, and is radially formed from the other end side of the guide shaft portion so as to be flexible. Since the diameter of the circle connecting the tips of the guide vanes is made larger than the inner diameter of the nose portion of the nailing machine, the fastening tool is held in one hand, and the guide shaft portion is nailed. The guide vane bends from its base and engages with the inner surface of the nose when it is inserted into the machine's nose. The fastening device is held in the nose portion by the stopping action, and does not fall off. Further, since the guide shaft portion can be driven in a state in which the perpendicularity is maintained, buckling, breakage, and the like are unlikely to occur.

  Next, it is only necessary to drive the fastener into concrete or the like with a nailing machine with the fastening tool facing up, so that the driving operation is easy. The fastener driven out by the nailing machine passes through the guide shaft portion held at the center of the nose portion by the guide blades and is driven into concrete or the like through the insertion hole of the fastener. At the same time, the nose portion separates from the surface of the ceiling concrete or the like due to the reaction at the time of driving. For this reason, the guide vane and the guide shaft portion are pushed outward by the head of the fastener, are crushed and escape to the outside of the head of the fastener. Therefore, it is hard to become a hindrance to driving and a sufficient amount of fasteners can be secured, so that the fastening tool can be strongly fixed to ceiling concrete or the like.

Also , when the guide shaft portion is fitted and fitted into the nose portion of the nailing machine, the guide vane bends and bends from its base, and its tip engages obliquely with the inner surface of the outer nose portion. The fastening tool is held in the nose portion by the repulsive force and the check action, and does not fall off.

  Next, the tip of the nose portion is brought into contact with a predetermined position on the surface of the ceiling concrete or the like together with the fastener, and the outer nose portion of the nailing machine is pressed against the surface when the fastener is driven. As a result, the inner nose portion moves relative to the nailing machine and hits the guide member at the tip of the inner nose portion. Even if the fastener is ejected with a slight inclination inside the inner nose portion, a plurality of guide pieces are formed on the outer peripheral surface of the guide shaft portion, and the inner diameter of the circle connecting the tips of the guide pieces is the outer nose. The guide shaft portion is held at the center of the inner nose portion by the guide piece. Therefore, the fastener driven out from the inner nose portion is surely guided through the center of the guide shaft portion to the insertion hole and is reliably driven out.

According to the second aspect of the present invention, since the guide hole for guiding the fastener driven out from the nailing machine is formed at the center of the guide shaft portion, the pin passes through the inside of the guide hole. Then, it is guided by the vertical guide shaft portion and reliably driven vertically into the surface of the ceiling concrete or the like through the insertion hole of the fixing piece of the fastening tool. When the fastener is driven, the inner surface of the guide shaft portion is expanded and the guide piece and the guide vane are also pushed outward, but the inner nose portion is separated from the surface of the ceiling concrete or the like by the reaction during driving, so the guide member Since the main part escapes and spreads outside the insertion hole, the guide member hardly remains between the back surface of the head of the pin and the fixed piece except for the crushed part. Therefore, the penetration amount of the fastener is sufficiently ensured. In addition, since the guide shaft portion of the guide member itself is thin and the guide piece is reinforced, the guide shaft portion has a high perpendicularity maintaining performance, but the strength against outward spread is small. The passage resistance when the pin passes through the guide hole in the shaft portion is very small. Therefore, there is little power loss and a hanging metal fitting can be firmly fixed to ceiling concrete etc.

According to the invention of claim 3 , since the guide piece is formed between the adjacent guide vanes, the guide vane and the guide piece can sufficiently exhibit their functions without receiving other interference with each other. Can do.

According to the fourth aspect of the present invention, when a plurality of anti-rotation protrusions are formed on the surface that comes into contact with the driven material when fixed to the driven material, If the guide member is crushed and turned to the back side, the concrete surface of the material to be driven is uneven, the warping tool is warped, etc., the back surface of the fastening tool is not in close contact with the surface of the material to be driven. Even if it is, since the projection is strongly pressed against the workpiece, the fastening tool is firmly held by the frictional force, and even if an external force acts like turning the fastener around, the fastening tool does not turn. The operator can be confident that the fastening tool is firmly fixed to the driven material, and the reliability is improved.

Further, the plurality of protrusions, a plurality of projections provided in the vicinity of the fastener insertion hole, because there and a plurality of projections provided at a position away from the fastener insertion hole, fastening device is these multiple Since the protrusions are firmly held by the frictional force due to the mutual action of the protrusions, the anti-rotation effect is high.

  In addition, the plurality of protrusions provided in the vicinity of the fastener insertion hole have a large anti-rotation effect, but the fastener is easily tilted. On the other hand, the plurality of protrusions provided at positions away from the fastener insertion holes are not so effective in preventing rotation, but have a high effect of stably holding the fastener. Therefore, with a well-balanced arrangement of these protrusions, it is possible to effectively achieve prevention of rotation and inclination of the fastener.

In the invention according to claim 5 , the plurality of protrusions provided in the vicinity of the fastener insertion hole and the plurality of protrusions provided at positions away from the fastener insertion hole are opposite to each other across the fastener insertion hole. Therefore, it is possible to more effectively realize the anti-rotation of the fastener and the prevention of the inclination.

  Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, A shows a hanging metal fitting as an example of a fastener. A nailing machine (not shown) for driving a pin a (fastener) into the hanging metal fitting A is a cylindrical shape provided so as to be relatively movable in the driving direction of the pin a with respect to the nailing machine body. A nailing machine having a double structure of an outer nose part (contact top) 1a and a cylindrical inner nose part 1b fixed to a nailing machine body. In addition, in the pin a, a1 is a connection material with another pin, a2 is a guide which prevents the pin a from inclining within the inner nose portion 1b, and both are members made of synthetic resin.

  The inner nose portion 1b has an injection port for the pin a, and is formed integrally with the nailing machine body. The outer nose portion 1a is provided on the outer end of the inner nose portion 1b at the tip of a contact arm (not shown) that is slidably disposed along the driving direction of the pin a. Further, the outer nose portion 1a is normally spring-biased so as to protrude from the tip of the inner nose portion 1b, and is pressed against a material to be driven such as concrete of the ceiling casing P, thereby resisting against the spring bias. It is configured to move backward and come into contact with the surface of the housing together with the tip of the inner nose portion 1b.

  The hanging metal fitting A is made of metal, and as shown in FIG. 7, the mounting piece 3 in which the screw hole 2 is formed and the fixing piece 5 in which the insertion hole 4 for the pin a (fastener) is formed are stepped portions. The guide member 7 is attached to the insertion hole 4 of the pin a of the fixed piece 5.

  The guide member 7 is a member made of synthetic resin having elasticity, and as shown in FIGS. 2A to 2D and FIG. 3, a guide shaft portion 8 having one end 8 a fixed to the insertion hole 4, and Three guide vanes 9 are formed radially from the other end of the guide shaft portion 8 and have flexibility. The diameter of the circle O1 connecting the tips of the guide vanes 9 is formed to be larger than the inner diameter of the outer nose portion 1a of the nailing machine.

  At the center of the guide shaft portion 8, a guide hole 10 for guiding the pin a driven out from the nailing machine is formed. A guide surface 11 that guides the tip of the pin a inward is formed at the tip of the guide hole 10. Further, the base end 8 a of the guide shaft portion 8 is formed with a small diameter so that it can be fitted into the insertion hole 4.

  The guide hole 10 may penetrate the center of the guide shaft portion 8, but the end portion 8 a on the side fitted in the insertion hole 4 may be solid. Further, it is preferable that the guide shaft portion 8 has a sufficient length (for example, about 7 to 10 mm) in order to improve the verticality.

  Next, a plurality of rib-shaped guide pieces 12 are radially formed on the outer peripheral surface of the guide shaft portion 8. The diameter of the circle connecting the tips of the guide pieces 12 is slightly smaller (about 0.1 to 0.5 mm) than the inner diameter of the inner nose portion 1b. An inclined portion 13 is formed at the distal end of the guide piece 12 so as to be inclined outward and guide the distal end of the inner nose portion 1b.

  The guide piece 12 may not be a continuous rib, but may be a form in which a plurality of protruding pieces or protrusions (not shown) are formed along the longitudinal direction of the outer peripheral surface of the guide shaft portion 8.

  According to the above configuration, when nailing, as shown in FIG. 4, first, the hanging metal fitting A is picked up and the tip of the guide member 7 is fitted and attached to the outer nose portion 1a. At this time, the guide blade 9 bends from its base while being bent, and its tip engages obliquely with the inner surface of the nose portion. Thus, the hanging metal fitting A is stably held without falling off the outer nose portion 1a.

  Next, as shown in FIG. 5, the tip of the outer nose portion 1 a is brought into contact with a predetermined position of the surface P such as ceiling concrete together with the hanging metal fitting A, and the nailing machine is moved upward when driving the pin a. Push in. As a result, the inner nose portion 1b moves upward together with the nail driver and hits the guide shaft portion 8, but is guided by the outer inclined portion 13 at the tip of the guide piece 12 (see FIG. 6). It is inserted inside the portion 1b, and at the same time, the guide vane 9 is folded and stored inside the inner nose portion 1b.

  In this way, the guide member 7 is held in a state where it does not move stably by the elastic repulsive force of the guide vanes 9. Further, the guide piece 12 is held in a state where the center of the guide shaft portion 8 is positioned.

  Further, since the guide shaft portion 8 is long and the diameter of the circle O2 connecting the tips of the guide pieces 12 is slightly smaller than the inner diameter of the inner nose portion 1b, as shown in FIG. Even if 1b is not perpendicular to the surface of concrete or the like but is pressed in a slightly inclined state, the guide shaft portion 8 is held in a vertical state.

  Therefore, when the nailing machine is activated, the pin a is fired from the inner nose portion 1b and hits the guide member 7 at the tip of the inner nose portion 1b. The pin a may be ejected with a slight inclination inside the inner nose portion 1b. However, since the guide surface 11 is formed at the tip of the guide hole 10 at the center of the guide member 7, the tip of the pin a is guided. It is guided by the surface 11 and jumps into the guide hole 10 of the guide shaft portion 8 and passes through the inside of the guide hole 10. And it is driven perpendicularly to the surface of ceiling concrete or the like through the insertion hole 4 of the fixed piece 5 of the hanging metal fitting A. The head of the pin a remains on the fixed piece 5. FIG. 7 is a perspective view showing a state in which the hanging metal fitting A is fixed by the pin a. In addition, as an object fastened to the said hanging metal fitting A, there exist an electric wire cable, a washer, a duct, a refrigerant pipe, etc.

  Thus, since it can drive in the state in which the perpendicularity is maintained, buckling, breakage and the like are unlikely to occur.

  Further, when the pin a is driven, the inner surface of the guide shaft portion 8 is expanded and the guide piece 12 and the guide blade 9 are also pushed outward. Since the main part of the guide member 7 escapes to the outside of the insertion hole 4 and widens, the guide member 7 is almost between the back surface of the head of the pin a and the fixed piece 5 except for the crushed part. Does not remain. Therefore, the penetration amount of the pin a is sufficiently ensured. Moreover, since the guide shaft portion 8 itself of the guide member 7 is thin and the guide piece 12 is reinforced, the guide shaft portion 8 has a high perpendicularity maintaining performance, but the strength against the outward spread is high. Since it is small, the passage resistance when the pin a passes through the guide hole 10 through the guide shaft portion 8 is very small. Therefore, there is little power loss and the hanging metal fitting A can be strongly fixed to ceiling concrete etc.

  The hanging metal fitting A can also be applied to a nailing machine in which the nose portion slides in the pin driving direction. In that case, the guide member 7 is in a state as shown in FIGS. Also in this case, when the guide shaft portion 8 is fitted in the nose portion of the nailing machine and the hanging metal fitting A is directed downward, the guide blade 9 bends from its base portion while being bent, and the tip thereof is on the inner surface of the nose portion. Since it engages diagonally, the hanging metal fitting A is held by the nose portion by the elastic repulsive force and the check action of the guide vanes 9 and does not fall off. Even when the pin a is driven into concrete or the like by a nailing machine with the hanging metal fitting A up, the driving operation is easy. The pin a driven out by the nailing machine passes through the guide shaft portion 8 held at the center of the nose portion by the guide blade 9 and is driven into concrete or the like through the insertion hole 4 of the fastener. At this time, the guide blade 9 and the guide shaft portion 8 are pushed outward by the head of the fastener, are crushed and escape to the outside of the head of the pin a. Therefore, there is no obstacle to driving.

  Moreover, the guide blade 9 and the guide piece 12 should just be formed radially from the center of the guide shaft part 8, and are not limited to the number. For example, as shown in FIG. 8, a configuration in which four guide vanes 9 and four guide pieces 12 are alternately provided may be employed.

  Furthermore, although the Z-shaped hanging metal fitting has been described as an embodiment of the fastener, for example, a shape in which a guide member is attached to a saddle band metal fitting or a washer may be used, and the material may be a resin other than a metal.

  By the way, the hanging metal fitting A fixed to the ceiling concrete or the like is strong against the force in the pulling direction, but if the force (load) F acts in the direction of the arrow in FIG. There is. 9 (a), 9 (b), and 9 (c), a plurality of anti-rotation protrusions 5a and 5b are formed on the surface that comes into contact with the housing P when fixed to the ceiling housing P. It is what. The protrusions 5a and 5b can be easily formed by pressing or the like.

  The plurality of protrusions 5a and 5b are provided at two locations in the vicinity of the fastener insertion hole 4 of the metal fitting A and at a position sufficiently away from the insertion hole 4, and there are three protrusions 5a in the vicinity of the insertion hole 4. One of these three protrusions 5a is provided on the longitudinal center line L of the hanging metal fitting A and at symmetrical positions with respect to the center line L.

  Here, three protrusions 5a and two protrusions 5b are provided. However, the number of protrusions 5a is not particularly limited, and two to four protrusions are provided, respectively, and have a function as a detent. It may be.

  In addition, there are two protrusions 5b at a position sufficiently away from the insertion hole 4, and these two protrusions 5b are symmetrical positions with a sufficient distance from each other across the center line L, and It is provided in the vicinity of the bent portion 5 e for the step portion 6.

  As shown in FIG. 10, the hanging bracket A is also fixed to the ceiling casing P by a fastener a in the same manner as the above-described hanging bracket.

  By the way, when it is fixed by the fastener a, the guide member 7 is crushed and turned to the back side (see FIG. 11A), the concrete surface of the housing P has irregularities, or the fixing piece 5 of the hanging metal A If there is a warp (see FIG. 11B), the back surface of the fixed piece 5 may not be in close contact with the housing P surface. However, since a plurality of anti-rotation protrusions 5a and 5b are formed on the surface of the hanging metal fitting A that comes into contact with the housing when fixed to the ceiling housing, as shown in FIGS. 9B and 9C. As shown, since the projections 5a and 5b are strongly pressed against the housing P, the suspension fitting A is firmly held by the frictional force. Even if an external force is applied to rotate the fastener a around the center, the suspension fitting A is not rotated. Therefore, the operator can be sure that the hanging metal fitting A is firmly fixed to the housing P, and the reliability is improved.

  In addition, the plurality of protrusions are a plurality of protrusions 5a provided in the vicinity of the insertion hole 4 and a plurality of protrusions 5b provided at positions away from the insertion hole 4, so Since the plurality of protrusions 5a and 5b are firmly held by the frictional force due to the mutual cooperative action, the anti-rotation effect is high.

  Furthermore, although the plurality of protrusions 5a provided in the vicinity of the fastener insertion hole 4 have a large anti-rotation effect, the hanging metal fitting A is easily inclined (see FIGS. 11C and 11D). In contrast, the plurality of protrusions 5b provided at positions away from the fastener insertion holes 4 are not so effective in preventing rotation, but have a high effect of stably holding the hanging metal fitting A. Therefore, with the well-balanced arrangement of these protrusions 5a and 5b, the suspension metal fitting A can be effectively prevented from being rotated and tilted.

  In addition, since the plurality of protrusions 5a and protrusions 5b are disposed on opposite sides of the fastener insertion hole 4, the suspension metal fitting A can be prevented from rotating and tilted more effectively. Can do.

  In addition, the building frame as the driven material for fixing the fastening tool is not limited to the ceiling frame. It may be a wall frame or a floor frame. Further, the fastener is not limited to a nail but may be a screw.

Sectional view showing the hanging bracket and the tip of the nailing machine (A) is a top view of a guide member, (b) is the side view, (c) is sectional drawing on the XX line of (a), (d) is YO- of (a). Cross section on line Y Perspective view of guide member Sectional drawing which shows the state which hold | maintained the hanging metal fitting in the outer nose part of a nail driver Sectional view showing the state where the hanging bracket is pressed against the concrete surface together with the nailing machine Sectional view showing the state of driving the pin into the hanging bracket The perspective view which shows the attachment state of a hanging metal fitting Plan view of another example of guide member It is a figure which shows the other example of a hanging metal fitting, (a) is a top view, (b) is sectional drawing on the centerline L of (a), (c) is a right view. The perspective view which shows the attachment state of the said hanging metal fitting It is explanatory drawing which shows the inclination state of a hanging metal fitting, (a) is sectional drawing of the principal part of the state which the guide member was crushed and turned to the back side, (b) is a side view in the state where the fixed piece had curvature. , (C) and (d) are a side view and a front view showing a tilted state.

A hanging metal fitting a pin 1a outer nose portion 1b inner nose portion 4 insertion hole 5 fixed piece 7 guide member 8 guide shaft portion

Claims (5)

A fastener that is fixed to a material to be driven by a fastener punched from a nose portion of a nailing machine,
In the insertion hole through which the fastener is inserted, a guide member is provided for guiding the fastener inserted inside the nose portion, and
The guide member includes a guide shaft portion having one end fixed to the insertion hole, and a flexible guide blade formed radially from the other end side of the guide shaft portion, and the tip of the guide blade Is larger than the inner diameter of the nose part of the nailing machine ,
The clasp has a double structure of an outer nose portion provided so as to be movable in the fastener driving direction relative to the nailing machine body and an inner nose part fixed to the nailing machine body. A fastening tool driven by a hammer,
While making the diameter of the circle connecting the tips of the guide vanes larger than the inner diameter of the outer nose portion of the nailing machine,
A fastener , wherein a plurality of guide pieces are formed on the outer peripheral surface of the guide shaft portion, and a diameter of a circle connecting the tips of the guide pieces is made smaller than an inner diameter of the outer nose portion . The center of the guide shaft portion is characterized in that guide holes for guiding the fasteners driven out from the nailing machine is formed, fastening device of claim 1, wherein. The fastening tool according to claim 1 or 2 , wherein the guide piece is formed between the adjacent guide blades. A plurality of anti-rotation protrusions are formed on the surface that comes into contact with the driven material when fixed to the driven material ,
The plurality of protrusions are a plurality of protrusions provided in the vicinity of the fastener insertion hole and a plurality of protrusions provided at positions distant from the fastener insertion hole. Fasteners described in 1. The plurality of protrusions provided in the vicinity of the fastener insertion hole and the plurality of protrusions provided at positions away from the fastener insertion hole are disposed on opposite sides of the fastener insertion hole. The fastening device according to claim 4 , wherein the fastening device is characterized.

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