JP2021188479A - Anchor pin - Google Patents

Abstract

To provide an anchor pin which reduces costs with a simpler structure while having a function of following vertical motion of a fixed member.SOLUTION: An anchor pin 1 includes: a head part 2 that overhangs sideways and has an overhang end as a free end; a neck part 3 hung from a base end of the head part 2; a bent part 4 that is continuous to a lower end of the neck part 3, is bent into a V shape and has an upper side part 4a and a lower side part 4b; and a leg part 5 that is continuous to a lower end of the lower side part of the bent part 4 and extends on the same axial line of the neck part 3. The head part 2 is engaged with an upper part Pa of a fixed member P and the upper side part 4a of the bent part 4 is engaged with a lower part Pb of the fixed member P, which can follow vertical motion of the fixed member P and does not remain in the projecting state.SELECTED DRAWING: Figure 6

Description

The present invention relates to an anchor pin used when a large number of fixed members such as a lining mat made of cement mortar, concrete or rubber are spread and fixed on the ground such as a slope or a flat ground.

In this kind of anchor pin, even if it plays the primary role of firmly fixing the fixed member to the ground, when the fixed member moves up and down due to an external factor after fixing, only the anchor pin is in a protruding state. It has the problem of being left behind.

That is, for example, when frost heaving (a phenomenon in which the water in the soil freezes and the ground rises) occurs, the ground itself rises, so that the fixed member rises together with the ground, and the anchor pin also rises as the fixed member rises. However, when the frozen water is thawed and the ground does not rise, only the member to be fixed is lowered and only the anchor pin is left in a protruding state.

In addition, for example, when a person walks on a fixed member, he / she steps on a part away from the anchor pin (for example, near the center of the distance between the anchor pins), and when the part sinks, the part near the anchor pin is rebounded. Is lifted up with the anchor pin, and then when the lifted part goes down, only the anchor pin protrudes and is left behind. On the other hand, when the portion near the anchor pin is stepped on and the portion sinks, only the anchor pin protrudes and is left behind.

In this way, if the anchor pin protrudes due to the vertical movement of the fixed member, it is dangerous because it may cause a pedestrian to stumble. Furthermore, the amount of protrusion of the anchor pin gradually increases, and in the worst case. The anchor pin may come off.

Therefore, as shown in Patent Document 1 below, the applicant of the present application has already developed an anchor pin that dares to follow the ups and downs of the fixed member, that is, the vertical movement of the fixed member. The anchor pin follows the vertical movement of the fixed member by engaging the head with the upper portion of the fixed member and the engaging body provided on the leg engaging with the lower portion of the fixed member. ..

Japanese Patent No. 6208197

Since the conventional anchor pin can follow the vertical movement of the fixed member, even if the fixed member rises with the ground due to frost heaving and then returns to the original position, the fixed member is lifted by the walking load. Even when it sinks or returns to its original state after sinking, it is possible to properly maintain the fixed state of the fixed member without being left behind and protruding from the ground, which is very convenient.

However, in the above-mentioned conventional anchor pin, it is necessary to provide an engaging body that engages with the lower portion of the fixed member on the leg portion so as to be expandable or spirally, which complicates the structure and the overall structure of the engaging body itself. I hate that the cost will increase as well.

Therefore, there is an urgent need for an anchor pin that has a function of following the vertical movement of the member to be fixed, but has a simpler structure and is less costly.

The present invention follows the vertical movement of the fixed member, which eliminates the need to provide a high-performance engaging body on the leg like the conventional anchor pin described above, and has a structure that can be easily configured at low cost. Anchor pins to be provided.

In short, the anchor pin according to the present invention extends laterally and is continuous with a head having the overhanging end as a free end, a neck hanging from the base end of the head, and a lower end of the neck. It is provided with a bent portion that is bent in a shape and has an upper side portion and a lower side portion, and a leg portion that is continuous with the lower end of the lower side portion of the bent portion and extends on the same axis as the neck portion, and the head is a fixed member. By engaging with the upper part of the above and the upper side of the bent portion engaging with the lower part of the fixed member, the vertical movement of the fixed member can be followed, so that only the anchor pin is projected. You will not be left behind.

Preferably, the inclination angle of the upper side portion of the bent portion with respect to the vertical direction is larger than the inclination angle of the lower side portion of the bent portion with respect to the vertical direction, and the lower side portion smoothly penetrates the fixed member when driving into the ground. As well as passing through the hole, the upper side portion can be reliably engaged with the lower portion of the fixed member after driving.

Further, by adopting the configuration in which the head is inclined downward toward the free end, the free end of the head can be reliably engaged with the upper part of the fixed member.

Preferably, a single or a plurality of convex portions can be provided on the leg portion to stabilize the buried state of the leg portion in the ground and to add a resistance force against coming off from the ground.

Further, the anchor pin according to the present invention is composed of one wire rod, that is, the head portion, the neck portion, the bent portion, the leg portion and the convex portion are formed by processing one wire rod. Can be provided. Therefore, the anchor pin has a simple structure and a low cost.

By making the cross section of the wire rod circular, it is possible to secure the shearing force and flexibility required for fixing the fixed member.

The anchor pin according to the present invention eliminates the need to provide a high-performance engaging body like a conventional anchor pin, and has a structure that can be easily configured at low cost, but can move the fixed member up and down. It is possible to accurately follow and properly maintain the fixed state of the fixed member without protruding.

(A) is a side view of the anchor pin according to the present invention, and (B) is a front view of the same. (A) is a side view showing another example of the anchor pin according to the present invention, and (B) is the same front view. (A) to (D) are explanatory views for step by step explaining the process of driving the anchor pin of FIG. 2 into the ground. It is an enlarged explanatory view of the state of FIG. 3D. It is explanatory drawing which shows the state which a large number of fixed members were laid on the ground and fixed with an anchor pin. It is sectional drawing which shows the part near the anchor pin of the fixed member, and the state which the anchor pin is lifted. It is sectional drawing which shows the part near the anchor pin of the fixed member, and the state where the anchor pin is sunk.

Hereinafter, embodiments of the anchor pin according to the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 shows a first example of the anchor pin 1 according to the present invention, and FIG. 2 shows the second example.

As shown in FIGS. 1 and 2, the anchor pin 1 according to the present invention has, as a basic configuration, laterally overhanging and hanging from a head 2 having the overhanging end as a free end and a base end of the head 2. The neck portion 3 is continuous with the lower end of the neck portion 3 and is bent in a dogleg shape to have an upper side portion 4a and a lower side portion 4b. 3 and a leg portion 5 extending on the same axis are provided, and as shown in FIGS. 3 and 4, the leg portion 5 is driven into the ground G through a through hole 11 formed in the fixed member P, and the head portion 2 is provided. And the bent portion 4, the fixed member P is held from the upper and lower sides and used.

Explaining a specific configuration, in the anchor pin 1 according to the present invention, the bent portion 4 is bent in a dogleg shape and has an upper side portion 4a and a lower side portion 4b as described above. As shown in FIGS. 1A and 2A, the inclination angle θ1 of the upper side portion 4a of the bent portion 4 with respect to the vertical direction is larger than the inclination angle θ2 of the lower side portion 4b of the bent portion 4 with respect to the vertical direction. As will be described later, the lower side portion 4b smoothly passes through the through hole 11 of the fixed member P at the time of driving into the ground G, and the upper side portion 4a surely reaches the lower portion Pb of the fixed member P after driving. Can be engaged.

Further, the head portion 2 projects laterally as described above, and one end thereof is a free end, and the neck portion 3 hangs down from the other end of the head portion 2 and extends in the vertical direction. Therefore, the head 2 and the neck 3 have an inverted L shape, but it is desirable that the head 2 is configured to be inclined downward toward the free end, not in the horizontal direction. That is, as shown in FIGS. 1 (A) and 2 (A), the head 2 is tilted downward with an inclination angle θ3 with respect to the horizontal direction. This is to ensure that the free end of the head 2 can be reliably engaged with the upper Pa of the fixed member P, as will be described later.

Further, as in the example of FIG. 1, the leg portion 5 can have a shape extending straight on the same axis as the neck portion 3. Therefore, the driving force applied to the head 2 by a hammer or the like is appropriately transmitted to the neck 3 and the legs 5 arranged on the same axis.

Alternatively, the leg portion 5 may be provided with the convex portion 6 as in the example of FIG. The convex portion 6 may be singular or plural, and preferably has the same bending configuration as the bending portion 4 described above, and the driving work into the ground G is made smooth. In this way, when the convex portion 6 is provided on the leg portion 5, it is possible to stabilize the buried state of the leg portion 5 in the ground G and to add a resistance force against the detachment from the ground G. Of course, in the leg portion 5, the portions other than the convex portion 6 are arranged on the same axis as the neck portion 3.

Further, the lower end (tip) 5a of the leg portion 5 may have a simple rod shape as shown in FIGS. 1 and 2, or may have a sharp shape, although not specifically shown.

The anchor pin 1 according to the present invention having the above-mentioned configuration is made of one wire made of metal or synthetic resin, that is, one wire is bent to form the above-mentioned head. A portion 2, a neck portion 3, a bent portion 4, a leg portion 5, and a convex portion 6 can be provided. Therefore, the anchor pin has a simple structure and a low cost. As described above, it is possible to manufacture the anchor pin 1 from a single wire at a lower cost, but in the present invention, it is not excluded that the anchor pin 1 is manufactured by molding it with a mold or the like. ..

When the anchor pin 1 of the present invention is made of a wire rod, preferably, the cross section of the wire rod is circular to ensure the shearing force required for fixing the fixed member P and the flexibility in multiple directions. Can be done. However, it is not excluded that the cross-sectional shape of the wire rod is other than a circle such as an ellipse or a polygon.

Further, preferably, as shown in FIGS. 1 (A) and 2 (A), the projecting direction of the head 2, the bulging direction of the bent portion 4, and the bulging direction of the convex portion 6 are set to be the same direction. As shown in FIGS. 1 (B) and 2 (B), the shape can be a straight line when viewed from the front side, the force transmission at the time of driving is highly efficient, and the structure is simple and compact. Can be done.

As shown in FIGS. 3A to 3D, in the anchor pin 1 according to the present invention, when the leg portion 5 is driven into the ground G, the lower end portion 5a and the convex portion 6 of the leg portion 5 are used. It passes through the through hole 11 of the fixed member P in the order of the lower side portion 4b of the bent portion 4. In particular, when the convex portion 6 and the lower side portion 4b of the bent portion 4 pass through the through hole 11, the entire anchor pin 1 bends (while bending) and swings due to the reaction of the bending. It passes through the through hole 11 while transmitting the driving force.

As described above, the inclination angle θ1 of the upper side portion 4a of the bent portion 4 with respect to the vertical direction is larger than the inclination angle θ2 of the lower side portion 4b of the bent portion 4 with respect to the vertical direction, and the lower side portion is formed when driving into the ground G. 4b smoothly passes through the through hole 11 of the fixed member P, and after driving, the upper side portion 4a is surely the lower edge of the through hole 11, that is, fixed, as shown in FIGS. 3 (D) and 4. It can be engaged with the lower portion Pb of the member P. Since the upper side portion 4a is inclined with respect to the vertical direction as described above, the fixed member P with which the inclined upper side portion 4a is engaged is fixed not only in the vertical direction but also in the horizontal direction. Will be. Although the figure is shown in FIG. 4 based on the anchor pin 1 shown in FIG. 2, the engagement with the fixed member P is the same when the anchor pin 1 shown in FIG. 1 is used.

In addition, the head 2 fits into the head engaging recess 10 provided in the upper Pa of the fixed member P, whereby the head 2 engages with the upper Pa of the fixed member P and carelessly. The head 2 is prevented from protruding from the fixed member P. At this time, since the head 2 is tilted downward with an inclination angle θ3 with respect to the horizontal direction, the free end of the head 2 can be reliably engaged with the upper Pa of the fixed member P. In the embodiment, a case where the head engaging recess 10 is provided in the fixed member P and the head 2 of the anchor pin 1 is directly engaged with the upper Pa of the fixed member P has been described. Is not limited to this, and includes indirectly engaging the head portion 2 of the anchor pin 1 with the upper Pa of the fixed member P via a known washer.

As described above, in the anchor pin 1 according to the present invention, although the structure is simple, the head portion 2 is surely engaged with the upper portion Pa of the fixed member P, and the upper side portion 4a of the bent portion 4 is covered. By securely engaging with the lower portion Pb of the fixed member P, it is possible to follow the vertical movement of the fixed member P and appropriately maintain the fixed state of the fixed member P without protruding.

Next, the actual use of the anchor pin 1 according to the present invention will be described. For convenience of explanation, FIGS. 6 and 7 are shown based on the anchor pin 1 shown in FIG. 2, but the anchor pin 1 shown in FIG. 1 is also used in the same manner.

As shown in FIG. 5, the anchor pin 1 according to the present invention has a fixed member P having a certain weight such as a lining mat made of cement mortar, concrete, or rubber on a ground G such as a slope or a flat ground. It is used when laying out a large number of pieces and fixing them, and drive them in at appropriate intervals.

As shown in FIG. 4 described above, in the ground G in normal times, the anchor pin 1 fits the head 2 into the head engaging recess 10 provided in the upper Pa of the fixed member P, and the head thereof. The leg portion 5 is driven into the ground G in a state where the portion 2 is engaged with the upper portion Pa of the fixed member P and the bent portion 4 (upper side portion 4a) is engaged with the lower portion Pb of the fixed member P.

Then, for example, when frost heaving occurs and the ground G rises, the fixed member P moves upward with the rise of the ground G, but as shown in FIG. 6, it is engaged with the upper Pa and the lower Pb of the fixed member P, respectively. The anchor pin 1 follows the upward movement of the fixed member P via the matching head portion 2 and the bent portion 4.

On the other hand, when the frost heaving state of FIG. 6 is released, the raised ground G tries to return to its original state, but at that time, the fixed member P sinks, and the fixed member P is moved from the upper and lower sides. The anchor pin 1 follows the downward movement of the fixed member P via the holding head 2 and the bent portion 4, and returns to the state shown in FIG.

Further, for example, when a person walks on the fixed member P and steps on a portion away from the anchor pin 1 (for example, near the center of the interval between adjacent anchor pins 1) and the portion sinks, FIG. 6 shows. As shown, the reaction causes the portion near the anchor pin 1 (the fixed member P around the head portion 2 of the anchor pin 1) to be lifted together with the anchor pin 1, but engages with the upper Pa of the fixed member P. The anchor pin 1 follows the upward movement of the fixed member P via the head portion 2 and the bent portion 4 that engages with the lower portion Pb.

Similarly, when a person walks on the fixed member P, the portion near the anchor pin 1 is stepped on, and when the portion sinks, it engages with the upper Pa of the fixed member P as shown in FIG. Since the anchor pin 1 follows the downward movement of the fixed member P via the head portion 2 and the bent portion 4 engaged with the lower portion Pb, the anchor pin 1 is not left behind in a protruding state.

As described above, in the present invention, the anchor pin 1 appropriately follows the upward movement and the downward movement of the fixed member P, and there is no possibility that only the anchor pin 1 is left behind and protrudes. also. Even if frost heaving, its release, and subsidence due to walking are repeated, the anchor pin 1 only repeatedly follows the vertical movement of the fixed member P, and there is no possibility that the anchor pin 1 will come off from the ground G.

1 ... Anchor pin, 2 ... Head, 3 ... Neck, 4 ... Bending, 4a ... Upper side, 4b ... Lower side,
5 ... Legs, 5a ... Lower end, 6 ... Convex part, 10 ... Head engagement recess, 11 ... Through hole, θ1 ... Inclination angle of the upper side of the bent part with respect to the vertical direction, θ2 ... Vertical of the lower side of the bent part Tilt angle with respect to direction, θ3 ... Tilt angle with respect to horizontal direction of head, P ... Fixed member, Pa ... Upper part of fixed member, Pb ... Lower part of fixed member, G ... Ground.

Claims (6)

The head that overhangs to the side and has the overhanging end as a free end, the neck that hangs down from the base end of the head, and the lower end of the neck, which is bent in a dogleg shape to form the upper and lower sides. It is provided with a bent portion and a leg portion that is continuous with the lower end of the lower end portion of the bent portion and extends on the same axis as the neck portion, and the head engages with the upper portion of the fixed member and the upper side of the bent portion. An anchor pin characterized in that the portion engages with the lower portion of the fixed member to follow the vertical movement of the fixed member. The anchor pin according to claim 1, wherein the inclination angle of the upper side portion of the bent portion with respect to the vertical direction is larger than the inclination angle of the lower side portion of the bent portion with respect to the vertical direction. The anchor pin according to claim 1, wherein the head is inclined downward toward a free end. The anchor pin according to any one of claims 1 to 3, wherein the leg portion is provided with a single or a plurality of convex portions. The anchor pin according to any one of claims 1 to 4, wherein the anchor pin is made of a single wire rod. The anchor pin according to claim 5, wherein the cross section of the wire rod is circular.

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