WO1997048910A1

WO1997048910A1 - Method of producing anchor and anchor

Info

Publication number: WO1997048910A1
Application number: PCT/JP1997/002071
Authority: WO
Inventors: Hisayoshi Yamamoto; Nobuyuki Hamatani
Original assignee: Yamahiro Co., Ltd.; Towa Byora Kabushiki Kaisha
Priority date: 1996-06-19
Filing date: 1997-06-16
Publication date: 1997-12-24
Also published as: JPH109234A; AU3107597A

Abstract

A metal pipe material (5) cut into a suitable length is prepared and is then press-forged by using an upper mold (65) and a lower mold (66) so as to reduce the inner diameter of the distal end portion (12) of the pipe. Similarly, a head portion (13) of a shaft portion (12) is shaped by conducting press-forging by an upper mold (68) and a lower mold (66). These two steps can be carried out in one forging step. A slit (16) is so cut as to extend from the lower distal end of the shaft portion (11) to a hole portion (15). An anchor is completed by fitting the pin (1) into the hole portion (15). The slit (16) may be omitted depending on the way of plastic working of the distal end of the shaft portion. An anchor having a self-boring function can be produced by fixing a drill bit simultaneously with shaping of the distal end portion. In this way, the steps of working the hole portion and the slit can be eliminated and various anchors can be produced easily.

Description

Description Anchor manufacturing method and anchor technical field

The invention of the present application refers to an anchor used for attaching and fixing an object to be fixed such as various metal fittings to a structure such as concrete, brick or block, and a method of manufacturing the anchor. The anchor here also includes a self-drilling anchor having a self-drilling function. Background art

FIG. 10 is an explanatory view sequentially showing a conventional method of manufacturing an anchor, in which (A) is a front view of a wire 50 which is a material, and (B) is a head of an anchor body by forging. Fig. 52 is an explanatory view of molding 52, (C) is a front view of the completed anchor body, and (D) is a front view of a state where the anchor is completed by combining bins 58. First, in FIG. 10 (A), a solid wire 50 made of metal and having a circular cross section, which is cut to an appropriate length, is prepared.

In FIG. 10 (B), the shaft 51 of the wire 50 is strongly held by the cam die 60 etc. by the breath forging method or the like, and the wire is stretched in the longitudinal direction of the wire by the push-type punch 61 etc. The head 52 is formed by applying pressure with a press machine.

Then, in Fig. 10 (C), a hole 55 for receiving the bin 58 in the longitudinal direction of the head 52 and the AX core portion of the AX 51 is formed with a machining tool such as a drill or a drill. Drill. Alternatively, the head 52 and the hole 55 can be forged using a device such as a tubular header.

Thereafter, a plurality of annular grooves 56 are cut at the lower end of the shaft 51 by a cutting tool. As will be described later, the groove portion 56 serves as a hook portion for the structure 72 when the tip portion of the link portion 51 expands. Further, a slit 57 is provided so as to divide the distal end portion into two portions from the lower distal end of the shaft portion 51 to the hole portion 55.

Finally, in FIG. 10 (D), the bin 58 is fitted from above the hole 55 to complete the anchor.

Fig. 11 is an explanatory view showing a method of using the above-mentioned conventional anchor, in which (A) shows a state where the anchor is set in a pilot hole, and (B) shows a state where the anchor is fixed. It shows the state where it was done.

First, in FIG. 11 (A), a pilot hole 70 is drilled in advance in the fixed object 71 and the structure 72 by an electric drill or the like, and an anchor 53 is inserted into the pilot hole 70. set.

In FIG. 11 (B), the bin 58 is hammered with a hammer or the like, and the bin 58 is driven into the slot 57 so that the tip of the bin 58 is forcibly fitted into the slit 57. 5 7 is expanded, and at the same time, the distal ends 54, 54 of the shaft 51 are expanded to fix the anchor 53 to the structure 72, and at the same time, fix the object 71 to the structure 71. 2 can be fixed.

In this figure, a plurality of annular grooves 56 provided at the front end are hooked to the structure 72 when the front ends 54, 54 are expanded by driving the bin 58. It is the part which becomes.

In the above-mentioned conventional anchor 53, the outer diameter of the head 52 is formed larger than the outer diameter of the rib 51, and the head 52 is particularly provided as another anchor. Some do not exist.

As an example, there is a so-called anchor bolt in which a thread is provided on an outer peripheral surface of an upper base end portion of the shaft portion 51. In such a case, the bolt is fixed by a nut or the like screwed into the thread. The object can be fixed to the structure.

As a method of manufacturing this anchor bolt, a press forging step of forming a head as shown in FIG. 10 (B) is not required, but a hole for receiving the head of the pin 58 is required. 5 Forming process to widen the inside diameter of the upper base end of 5 A step of engraving threads on the peripheral surface with a die or the like is required.

As another example, there is one in which the inner diameter of the upper base portion of the hole portion 55 provided in the shaft center of the AX 51 is formed large and a female screw is formed on the inner peripheral surface thereof. In this case, the object to be fixed can be fixed to the structure with a bolt or the like screwed into the female screw.

Also in this method of manufacturing an anchor, a force that eliminates the need for the press forging step of forming the head as shown in FIG. 10 (B), and a hole drilling operation at the upper end of the hole 55 with a large inner diameter. Alternatively, a forming process and a process of forming a thread on a surface with a tap or the like are required.

In the above-described conventional method for manufacturing an anchor, since a solid wire 50 is used as a material, drilling with a drill or a drill is required to form a hole 55 for inserting the pin 58. It becomes necessary, and even in the case of forging, several times of processing are required, as in the case of three or four steps. In addition, in the operation for forming the hole 55, if the length of the anchor is longer than a certain length, it becomes difficult to manufacture the tool from various points such as tools, the number of steps, and operation time. Furthermore, if the depth of the hole 55 is too long, the operation may be practically impossible, so that the length of the anchor manufactured by this method is limited.

Therefore, in the present invention, it is not necessary to perform the above-described operation of forming a hole for fitting a pin as in the related art, and it is not necessary to form a slit provided at the tip of the hook portion. The first object is to provide a manufacturing method in which a main body of an anchor having a hole formed in a shaft center by rolling is easily formed, and to provide an anchor manufactured by this method.

Furthermore, in addition to the forging and forging of the anchor body, a self-drilling function is provided at the tip of the bow with a drill blade capable of drilling a pilot hole in the fixed object or the structure itself such as concrete. A second object of the present invention is to provide a self-drilling anchor having the above and a method for manufacturing the self-drilling anchor. Disclosure of the invention

In order to solve the above problem, a first aspect of the present invention is that a shaft core of the shaft portion 11 is formed by drilling from the upper base end of the shaft portion 11 toward the lower end portion of the chain portion 11. And a slit 16 extending from the tip to the hole 15 at the lower end of the string 11, and a hole 1 In the method for manufacturing an anchor for a structure such as a concrete in which a bin 1 is inserted from the upper end of 5, a metal pipe material 5 of an appropriate length is used as a material of the anchor main rest part 10 once or once. Forming the distal end side of the anchor portion 11 of the anchor body 10 and forming the base end side of the anchor main body 10 by performing plastic working twice or more, before or after this plastic working This is a method for manufacturing an anchor, characterized in that a slit 16 is formed at the tip of a stalk 11.

In this manufacturing method, since the pipe material 5 is used as the material of the anchor main body 10, a punching work process for forming a hole 15 for fitting the bin 1 is not required, and the press forging is performed. The basic shape of the main body of the anchor is easily completed by plastic working such as. A slit 16 may be formed at the tip of the bow before or after this plastic working.

According to a second aspect of the present invention, a bottle driving hole formed in the shaft core of the shaft 11 from the upper base end of the shaft 11 to the lower end of the shaft 1I. The lower end of the shaft portion 11 has a slit 16 extending from the front end to the hole 15, and a pin 1 is provided from the upper end of the hole 15. In an anchor for a structure such as concrete that has been inserted, an anchor main body 10 is formed of a metal pipe member 5, and the anchor main body 10 has at least an inner diameter of a tip end of the pipe member 5. It has an enlarged portion 14 formed by being reduced by plastic working, and the enlarged portion 14 has a slit 16 formed before or after the plastic working. It is a characteristic anchor.

Here, the expanded portion 14 is a portion where the slit 16 is provided at the tip of the anchor main body 10, and is divided by the slit 16 by driving the bin 1. Refers to the part where the part is pushed out. Since this anchor is manufactured by the manufacturing method according to the first aspect of the present invention, it does not require the hole 15 to be drilled, so even if the anchor 11 has a long length, It can be easily manufactured.

According to a third aspect of the present invention, there is provided a hole for punching a bottle, which is formed in the shaft portion of the shaft portion 11 from the upper base end of the shaft portion 11 toward the lower end portion of the shaft portion 11. The lower end of the hook portion 11 has a slit 16 extending from the tip to the hole, and the pin 1 is fitted from the upper end of the hole 15. In a method of manufacturing an anchor for a structure such as concrete, a vibrating material 5 is used as a material of an anchor main body 10, and the pipe material 5 is cut into appropriate lengths, and a slit 1 is formed at a tip of the pipe material 5. 6 is formed, and at least the portion provided with the slit 16 is formed by rolling to form a groove or a screw thread, etc., and at the same time, the slit 16 is provided by the plastic working. A method for manufacturing an anchor, characterized in that the inside diameter of the pipe member 5 in the bent portion is reduced.

In this manufacturing method, as in the first invention, since the pipe material 5 is used as the material of the anchor body 10, the hole 15 for fitting the bin 1 is formed. No drilling process is required.

On the other hand, the rolling process can reduce the inner diameter of the portion in which the slit 16 is provided, and at the same time, can form the structure portion and the thread.

According to a fourth aspect of the present invention, a metal pipe material is prepared as a material of the anchor main body 40, and one or more times of plastic working is performed to form the tip 4 of the anchor portion 41 of the anchor main body 40. Forming of the base part side of the anchor body is performed by molding the base part of the anchor body part 40. A method of manufacturing an anchor for a structure such as a concrete in which a driving pin 1 for expanding a screw tip 42 is arranged in a hole 15 extending from an end to a tip. is there. Also in this manufacturing method, since the pipe material is used as the material of the anchor main body 40, a drilling work step of drilling a hole 15 for fitting the pin 1 is not required, and There is no need for a process to provide a slit at the tip. The basic shape of the main body 40 of the anchor is easily completed by plastic working.

The reason that the slit at the tip of the shaft does not have to be formed is that the hole at the tip of the shaft is crushed by drawing the shaft, and the bottle is forcibly inserted into the crushed hole. This causes breakage in the longitudinal direction of the shaft portion at the distal end portion of the shaft portion, thereby expanding the distal end portion of the shaft portion.

According to a fifth aspect of the present invention, in the above-described fourth aspect, drill blades 8 and 9 having a drilling function are arranged in a mold 63 in advance, and a portion 41 of the anchor main body 40 is formed. A method for manufacturing an anchor, characterized in that the drill bits 8, 9 are fixed to the distal end portion 42 of the upper portion 41 at the same time when the distal end portion 42 is formed.

According to this manufacturing method, simultaneously with the formation of the anchor main body 40, the drill blades 8, 9 are fixed to the tip of the shaft portion, and an anchor having a function of making a prepared hole in a fixed object or a structure can be easily manufactured. Becomes possible.

A sixth aspect of the present invention uses a metal vibrating material as a material of the anchor body 40, and performs one or more times of plastic working to form the tip 4 of the anchor 41 of the anchor body 40. The inner side of the anchor 4 is formed by molding the base 2 side and the base end side of the anchor main body 40, and by shaping the distal end 42 of the shaft 41, the inner diameter of the thread 4 is reduced. An anchor for a structure such as a concrete, which is provided with a driving pin 1 for expanding the threaded portion distal end portion 42 in a hole portion 15 extending from the base end side to the distal end side. It is. In this anchor, since a pipe is used as a material of the anchor main body 40, it is not necessary to perform a perforation work for perforating the hole 15 for fitting the bin 1. Similarly, the work of providing a slit at the tip of the shaft is unnecessary.

In this anchor, a pilot hole is drilled in advance in an object to be fixed or a structure such as concrete with an electric drill or the like, the anchor is set in the pilot hole, and the bin is driven into the bin, whereby the bin is formed. This penetrates into the crushed hole in the tip of the pongee, which breaks the tip of the thread in the longitudinal direction of the thread and expands the tip, thereby fixing the fixed object to the structure. You can. A seventh aspect of the present invention is the anchor according to the sixth aspect, wherein the drill blades 8 and 9 having a drilling function are fixed to the distal end portion 42 of the upper portion 41 of the anchor main body 40.

With this anchor, when fixing the object to the structure, there is no need to previously drill the prepared hole with a drill or the like. Using this anchor, the object to be fixed is directly set on the structure, By drilling a pilot hole and then driving the bottle, the object can be fixed to the structure. BRIEF DESCRIPTION OF THE FIGURES

1A and 1B show a method of manufacturing an anchor according to the present invention, in which (A) is a front view of a pipe material, and (B) is a molding process on a tip end side of a shaft portion of an anchor body. (C) is an explanatory view showing the forming process on the upper base end side of the shaft portion, (D) is a front view showing a state in which a slit is formed at the distal end of the chain portion, and (E) ) Is a front view of the state where the anchor is completed.

FIG. 2 is an explanatory view illustrating one forming step of manufacturing an anchor according to another embodiment of the present invention.

FIG. 3 is an explanatory view illustrating a molding step for manufacturing a fan according to still another embodiment of the present invention.

FIG. 4 is a front view of an anchor main body according to still another embodiment of the present invention.

FIG. 5 shows an anchor according to still another embodiment of the present invention, in which (A) is a front view and (B) is a bottom view.

FIG. 6 shows a method of manufacturing the anchor shown in FIG. 5, in which (A) is a front view of a pipe material, and (B) is an explanatory view showing a forming process of a lower end portion of a pipe material. (C) is a plan view of the lower mold 67, (D) is an explanatory view showing the forming process of the head at the upper end of the pipe material, (E) is a bottom view of the tip of the anchor body, (F) is a front view of the completed anchor. FIG. 7 shows an anchor according to still another embodiment of the present invention, and shows a so-called self-drilling anchor having a drill bit fixed to a front end portion, (A) of which is a perspective view, and (B) of FIG. ) Is an enlarged front view of the tip portion.

Fig. 8 shows the drill bit fixed to the tip of the anchor, (A) shows the front view of the drill bit used for the anchor shown in Fig. 7, and (B) shows the drill bit. A side view, (C) is a front view of a drill bit according to another embodiment, and (D) a side view of a brute force.

FIG. 9 illustrates a method of fixing the drill blade at the same time as forming the tip of the anchor body, and (A) shows the method in which the drill blade is arranged in the mold and the tip of the anchor body is formed. FIG. 3B is a cross-sectional view of a tip of an anchor manufactured by the method.

FIG. 10 is an explanatory view showing a conventional method for manufacturing an anchor, in which (A) is a front view of a wire, and (B) is an explanatory view of a step of forming a head of an anchor; ) Is a front view of the completed anchor body, and (D) is a front view of the completed state of the anchor by combining pins.

FIG. 11 is an explanatory view showing a method of using the conventional anchor shown in FIG. 10, in which (A) shows a state where the anchor is set in a prepared hole, and (B) a force This shows the anchor fixed. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 9 illustrate an embodiment of the present invention.

FIG. 1 shows a method of manufacturing an anchor according to the present invention, in which (A) is a front view of a pipe material 5 cut to a predetermined length, and (B) is a cross section of an anchor body. Explanatory drawing showing the forming process on the distal end side of FIG. 1, (C) is an explanatory diagram showing the forming process on the upper base end side of the chain 11, and (D) is the distal end 1 2 of the chain 11. FIG. 2 is a front view showing a state in which a slit is formed, and (E) is a front view showing a state in which an anchor is completed. First, as shown in FIG. 1 (A), a metal pipe material 5 having a constant outer diameter cut into an appropriate length is prepared. A hole 15 having a constant inner diameter naturally penetrates in the longitudinal direction of the shaft core portion of the pipe material 5 as a material.

Next, as shown in Fig. 1 (B), the upper die 65 and the lower die 66 are used to apply force in the axial direction by a mechanical hammer or a breath machine, and forging is performed. The tip 12 of the part 11 is formed. The distal end portion 12 is formed so as to have an outer diameter smaller than the outer diameter of the shaft portion 11, and the hole i5 of the distal end portion 12 is crushed and the inner diameter thereof is reduced. Although this figure shows an example in which a certain inner diameter is maintained, the inner diameter may be reduced to substantially zero holes, in other words, until the inner diameter becomes substantially zero. After that, as shown in FIG. 1 (C), the head 13 of the joint 11 is formed. That is, the upper part 68 and the lower mold 66 apply pressure to the lower part 11 from the upper part, and the inner peripheral part of the upper end part of the head part 13 and the hole part 15 is formed by press forging or the like. Done. The cross-sectional shape of the head 13 may be circular, like the cross section 11, or may be a hexagonal cross-section, etc., and can be freely designed.

Then, although not shown, the shaft 11 is kicked out by a bottle, and as shown in FIG. 1 (D), the tip of the shaft 11 is moved from the lower end of the chain 11 to the hole 15. The slit 16 is cut so as to divide 1 2 into two, that is, divide it into two in a plane that surrounds the center of the 轴 portion.

Further, a ring-shaped ridge and a ridge, or a spiral groove and a ridge (or a thread) are machined on the tip end portion 12 of the shaft portion 11 as necessary.

Then, by inserting the bin 1 into the hole 15, an anchor as shown in FIG. 1 (E) is completed.

An annular ridge or a spiral ridge provided at the tip 12 of the shaft 11 is driven into a bottle, and the enlarged portions 14 and 14 at the tip of the thread 11 are expanded. When it is opened, it becomes a hook for the structure.

The spiral ridge 14a shown in Fig. 1 (E) may be processed by cutting, but may also be rolled using a rolling die used for screw processing. You. When a rolling die is used, the ridge diameter increases as the valley diameter decreases. Therefore, as shown in Fig. 1 (E), the outer diameter (peak diameter) of the tip 12 is reduced to the ridge 11 It is formed to be almost equivalent to

The division of the distal end portion 12 by the slit 16 is not limited to two, but the number of divisions such as four or five can be changed as appropriate.

Either the processing of the annular ridge / groove or the like or the processing of the slit may be performed first.The processing of forming the slit may be performed before the plastic processing of the vip material 5. Good. When the slit 16 is formed before the plastic working, the gap between the slits 16 is the force that is lost by the plastic working, that is, the force that the gap becomes zero. Since the notch of 16 itself remains, there is no problem in expanding the expanded portions 14 and 14.

In the above manufacturing method, as shown in FIGS. 1 (B) and (C), the main body portion of the anchor was manufactured by a two-stage forging process. It is also possible to form both the tip 1 2 and the head 13 of the shaft 1 て at a time by performing a single breath with the breath machine using the lower mold 66 and the upper mold 68. In some cases, the hole 15 in the core of the head 13 may be crushed by force, so this crushed hole 15 will be removed using a bottle or drill in a later process. Opening work is required. However, this hole drilling operation can be easily performed in a short time because the crushed portion is a part of the hole.

FIG. 2 is an illustration depicting one step in a method of manufacturing another type of anchor.

This anchor does not have a head having an outer diameter larger than the outer diameter of the glaze portion 11, and a thread is formed on the outer peripheral surface 18 of the base end 21 of the lux portion 11. This is a so-called anchor bolt that can fix an object to a structure by screwing a nut or the like onto a screw thread. First, the tip and the end 12 of the shaft 11 are the same as those in the embodiment shown in FIG. 1 (B). The upper die 65 and the lower die 66 are used to perform plastic working by forming with a breath machine or the like.

Next, as shown in FIG. 2, the base end 21 of the shaft 11 is subjected to breath forging with the lower mold 66 and the upper mold 69 to form the upper end 17 of the hole 15. Molding is performed. The head of bin 1 fits into this hole.

Also in this molding process, it is possible to manufacture by one molding step instead of the above two molding steps.

That is, press forging is performed using the upper mold 69 and the lower mold 66 (FIG. 1 (B)), and plastic processing of the anchor main body can be performed in one process.

After that, a thread is formed on the outer peripheral surface 18 of the base end 21 of the shaft 11 and a slit is formed on the distal end 12 of the shaft 11 to complete the main anchor portion of the anchor. .

Either process may be performed before forming the thread and forming the slit. Also in this embodiment, the slit forming process can be performed before the plastic forming of the shaft portion.

FIG. 3 is an explanatory view illustrating one step of a method for producing still another type of anchor.

This anchor also does not have a head with an outer diameter larger than the outer diameter of the shaft 11, and forms a thread groove on the inner peripheral surface 19 of the base end 22 of the AXIS 11. Then, a female screw portion is formed, and a bolt or the like is screwed into the female screw portion so that the object to be fixed can be fixed to the structure.

First, the tip portion 12 of the shaft portion 11 is plastically formed by forging with a breath machine using an upper die 65 and a lower die 66 in the same manner as in the embodiment shown in FIG. 1 (B). Processing is performed.

Next, as shown in FIG. 3, the base end portion 22 of the shaft portion 11 is press-forged with a lower die 66 and an upper die 75 to form the upper portion of the hole 15. Done. In a later step, a thread groove is formed on the inner peripheral surface 19 of the hole, and a female screw portion is formed. Even in this molding process, it is not based on the above two molding steps but on one molding step. Can also be manufactured.

That is, press forging is performed using the upper die 75 and the lower die 66 (FIG. 1 (B)), and the plastic processing of the anchor body can be performed in one process.

After that, a screw thread is carved on the inner peripheral surface 19 of the base end 22 of the lux part 11 and a slit is formed on the tip 12 of the screw part 11, so that the main body of the anchor is It is completed. Either of the engraving of the thread and the formation of the slit may be performed first.

Further, the slit may be formed before the plastic working of the screw portion.

On the other hand, as shown in Fig. 1, the anchor according to the present invention is manufactured by the above-described manufacturing method, and the anchor of the shaft 11 is attached to the upper base end of the shaft 11. There is provided a hole 15 for bin driving, which is formed toward the lower end portion 12 of the shaft portion 11 from the lower end portion 12 of the shaft portion 11. 5 is provided, and a bin 1 is inserted from the upper end of the hole 15, and a metal of an appropriate length is used as a material of the anchor body 10. Forming the tip 12 of the anchor body 10 by forging by one or more forgings or presses using the pipe material 5 and the base end of the head 13 of the anchor body 10 The side 16 is formed, and before or after the plastic working, a slit 16 is formed at the tip 12 of the upper part 11.

That is, the anchor main body 10 includes at least the expanded portions 14 and 14 formed by reducing the inner diameter of the tip portion of the vip material 5 by the inner working and the working, and the base end of the pipe material 5. A base portion (head 13) formed by processing the portion, and an intermediate portion 20 located between the enlarged portion 14 and the base portion (head 13). The expanded portion 14 has a slit 16 formed before or after the plastic working, and the intermediate portion 20 is used without deforming the pipe material 5.

Incidentally, the intermediate section 20 may be slightly deformed.

Further, if necessary, an annular ridge or ridge, or a spiral groove or ridge (or thread) may be formed at the tip 12 of the luxure 11. Can be. In addition, in the case of an anchor manufactured by the manufacturing method shown in FIG. 2 or FIG. Threads such as anchor bolts are formed by engraving threads appropriately on the outer peripheral surface 18 of the base end 21 of the shaft 11 or the inner peripheral surface 19 of the base 15 2 of the hole 15. Other types of anchors are formed.

In these anchors as well, an intermediate portion 20 between the distal end portion 12 and the base end portions 21 and 22 serving as the inspected portion uses the pipe material 5 as a raw material without deformation. However, the intermediate portion 20 may be slightly deformed.

That is, the intermediate portion 20 may be subjected to plastic working or cutting. These processes can be performed quickly and easily, because the material is hollow pipe material.

FIG. 4 is a front view of an anchor main body 30 according to another embodiment. The anchor main body 30 differs from the anchor main body 10 in the shape of the head 33 and the shape of the tip 32 of the chain 31, and other configurations are substantially the same. The same is true. The method of manufacturing the anchor body 30 is as follows.

First, a metal pipe material is cut into appropriate lengths.

A forging process is performed on the base end of this pipe material using the lower mold and the upper mold in the same manner as in the above-described method, and a head 33 is formed.

Next, the leading end 32 of the pipe material is rolled by a rolling die or the like to form a plurality of annular ridges 32a. This reduces the inner diameter force of the groove 32a of the tip 32 of the pipe material.

Next, the slit 16 is cut so as to divide the tip 32 into two. This slit forming step can be performed before the plastic working. The tip 16 is divided into two parts by the slit 16, and each part becomes an expanded part 34, 34.

Finally, a bottle is inserted into the hole 15 of the anchor main body 30 to complete the anchor.

The shape of the head 33 of the anchor main body 30 has the same shape as the head of a bolt having a hexagonal shape in plan view.

By driving the bottle inserted into the hole 15 of the anchor main body 30, The tip of the pin fits into the slit 16 formed in the distal end 32 of the part 31, and can be expanded with the expanded portions 34, 34 of the distal end 32.

FIG. 5 shows an anchor according to another embodiment of the present invention, in which (A) is a perspective view of the anchor and (B) is an enlarged bottom view.

This anchor is composed of a main body 40 and a pin 1 fitted into a hole 15 penetrating through the core of the main body 40. Since the main body 40 is manufactured from a metal pipe material as will be described in detail later, a hole 15 penetrating through the core is formed in advance. The head 43 can be formed by a header or the like, and the tip portion 42 of the shaft portion 41 can be similarly formed by drawing using a mold or the like, and can be manufactured by plastic working. This anchor has an AX part 41 extending downward from the lower surface of the head 43, and the tip part 42 of the AX part 41 has an outer peripheral surface facing the wick as shown in the bottom view. Thus, four recesses 42a are formed at the same interval. The positioners of these recesses 42a are formed at 90 degrees from the center. Each part 42 a is formed with a predetermined length in the longitudinal direction of the shaft part 41.

Due to the formation of the recess 42a, the inner diameter of the hole 15 existing in the core of the shaft 41 is reduced, and the hole 15 is crushed. However, even when the recess 42 a is formed, the outer diameter of the distal end portion 42 of the hook portion 41 is the same as the outer diameter of the upper proximal portion 1 where the recess 42 a is not formed. Are identical.

Then, the bin 1 is inserted into the hole 15 to complete the anchor _β

The anchor body portion 40 is formed by processing at least the censored portions 44, 44 formed by reducing at least the inner diameter of the distal end portion of the vibrator material by plastic working, and the base end portion of the vip material. And a middle portion 20 located between the enlarged portion 44 and the proximal portion (head 43). 4 has a recess 42a formed by the plastic working described above, and an intermediate portion 20 is used without deforming the pipe material.

The intermediate portion 20 may be slightly deformed.

Further, if necessary, the tip portion 42 of the shaft portion 41 may be provided with an annular groove or ridge, Alternatively, a spiral groove or a ridge (thread) can be formed.

In use, place the object to be fixed on a structure such as concrete, drill a pilot hole with an electric drill, etc., set this anchor in this pilot hole, and drive in bin 1 with a hammer or the like. As a result, the tip of the bottle 1 penetrates into the crushed hole 15 and forcibly expands the hole 15, so that the tip 42 of the pong 41 breaks. This rupture occurs along the imaginary lines P and Q in FIG. 5 (B), and the rupture line extends along the longitudinal direction of the chain portion 41. As a result, the expanding portion 44 at the tip of the shaft portion 41 expands, and the anchor itself is fixed to the structure, and at the same time, the object to be fixed is also fixed to the structure.

FIG. 6 is an explanatory view for manufacturing the above-mentioned anchor, in which (A) is a front view of the pipe material 5 cut to a predetermined length, and (B) is a hook part of the anchor body. 41 is an explanatory diagram showing the forming process on the distal end side, FIG. (C) is a plan view of the lower die, and (D) is an explanatory diagram showing the forming process on the upper base end side of the chain portion 41. FIG. 2 (C) is an explanatory view showing a state where the section 41 shown in FIG. 2 (C) is rotated by about 45 degrees, FIG. 2 (E) is a bottom view of the shaft section, and FIG. It is a front view.

First, as shown in FIG. 6 (A), a metal puff material 5 having a predetermined thickness and a predetermined outer diameter cut to an appropriate length is prepared. A hole 15 having a constant inner diameter naturally penetrates in the longitudinal direction of the core of the pipe material 5 serving as a material.

Next, as shown in Fig. 6 (B), forging is performed by applying force in the axial direction using a mechanical hammer or a press machine using the upper mold 65 and the lower mold 67. 4 Form the front end 4 2 of 1.

As shown in Fig. 6 (C), the lower mold 67 has four vertically long ridges 67a at the same interval in the lower part of the mold and at right angles to the center. Have been. By these ridges 67a, four recesses 42a in the vertical direction are formed at the tip 42 of the ridge 41 at four positions corresponding to the ridges 67a. . Due to these recesses 42 a, the hole 15 inside the shaft 41 is crushed at the tip 42, and the inner diameter is reduced. It should be noted that, in this figure, an example in which the inner diameter is maintained to a certain extent is illustrated, and the force may be reduced so that the hole is substantially eliminated, in other words, the inner diameter may be substantially reduced to _0.

Thereafter, as shown in FIG. 6 (D), the head 43 of the shaft 41 is formed. That is, the upper part 68 and the lower mold 67 apply pressure to the lower part 41 from the upper part, and the inner peripheral part of the upper end part of the head part 43 and the hole part 15 is formed by breath forging or the like. Done. The cross-sectional shape of the head capital 43 may be circular as in the case of the shaft 41, or may be a hexagonal cross-section, etc., and can be freely designed.

FIG. 6 (E) shows a bottom view of the shaft portion 41, and four recesses 4 2a are provided at the tip portion 42 of the shaft portion, and four holes are provided at the same interval, and a hole portion 15 is provided. You can see it being crushed.

Then, by inserting the bin 1 into the hole 15, an anchor as shown in FIG. 6 (F) is completed.

In addition to this, processing is performed so that an annular groove ゃ ridge or a spiral groove ゃ ridge (screw) is provided at the tip end 42 of the shaft 41 as necessary. You are free to do so.

The annular groove or the like, or the spiral groove or the like serves as a hook for the structure when the tip 1 42 of the shaft 41 is expanded by driving the bin 1.

The processing of the annular groove portion and the ridge portion may be performed by cutting, but may be performed by rolling using a rolling die used for screw processing.

In the above-mentioned manufacturing method, as shown in FIGS. 6 (B) and (D), the force for manufacturing the main body of the anchor by the two-stage forging process. By using the mold 67 and the upper mold 68, it is also possible to form both the tip 42 and the head 43 of the joint 41 at one time by performing a single breath with a breath machine. ,

In this case, the hole 15 of the wick portion on the side of the head! 3 may be crushed, so the crushed hole 15 is used in a later step by using a bottle or a drill. The work of drilling holes Required. However, this hole drilling operation can be easily performed in a short time because the crushed portion is a part of the hole.

In the anchor completed by the above manufacturing method, an anchor is placed on a structure such as concrete, a pilot hole is drilled in advance from above the anchor, and the anchor is inserted in the pilot hole. Set it and drive bin 1 with a hammer.

When the pin 1 is driven, the bin 1 is forcibly penetrated into the crushed hole 15 of the tip 42 of the rib 41. As a result, the leading end 42 breaks, and the breaking line runs in the longitudinal direction of the bristle part. At the same time, the leading end 42 broken by the intrusion of the bottle 1 is expanded, and the inner peripheral surface of the pilot hole is opened. Become a bite. As a result, the anchor is firmly fixed to the pilot hole, and at the same time, the fixed object is fixed to a structure such as concrete.

In the anchor according to this embodiment, the most different point from the anchor is that the distal end 42 is broken and expanded, and the slit provided in the anchor is formed. That is not. This eliminates the need for both the hole drilling step and the slit cutting step.

Further, the shape of the base end side of the anchor main body 40 can also be formed in another shape, and this base end is formed by the forging process shown in FIGS. 2 and 3. Therefore, it is of course possible to form them as anchor bolts or the like.

FIG. 7 illustrates an anchor according to another embodiment of the present invention, in which (A) is a perspective view thereof, and (B) is an enlarged front view of the distal end portion of the anchor.

The anchor according to the present embodiment has a plate-like drill blade having a drilling function fixed to the distal end portion 42 thereof, and is called a so-called self-drilling anchor.

The structure of the main body of this anchor is almost the same as that of the anchor shown in FIG. 5 described above. The shape of the head and the spiral ridge 41 a on the outer periphery of the ridge 41 are provided. The only difference is that they are provided. In this anchor, two opposing recesses 4 2a and 4 2a of the four recesses 4 2a formed at the tip 42 of the chain 4 1 Is fixed at the base end. The head 43 has the same hexagonal cross-section as the hexagonal bolt head so as to be able to engage with the rotary engagement portion of the rotary tightening tool. A helical ridge 41 a is formed on the outer peripheral surface of the shaft 41 extending downward from the head 43 to remove chips when drilled by the drill bit 8 at the tip. Used for The spiral ridge 41 a can be formed by cutting after forming the head 43 and the ridge 41, or can be formed by rolling with a rolling die or the like. it can.

The drill blade 8 is made of a plate-like body having a substantially U-shape when viewed from the front. A notch 8 c having a constant width is formed in the center in the vertical direction, and the engaging portions 8 a located on both sides of the notch 8 c are connected to the ffl of the distal end portion 42 of the anchor main body 40. It is forcibly fitted to the place 42a and fixed.

This is because the tip of the driving bin 1 can penetrate into the inside of the cutout 8c.

As a method of fixing the drill blade 8 to the distal end portion 42 of the chain portion 41, there is a method of forcibly fitting the engaging portion 8a of the drill blade 8 into the recess 42 as described above. However, as described later, it is also possible to simultaneously fix by drilling forging in a state where the drill blade is arranged in the mold.

FIG. 8 shows a drill bit fixed to the tip end portion 42 of the anchor single rest portion 40. FIG. 8 (A) shows a front view of the drill bit 8 shown in FIG. 7, and FIG. Is a side view, (C) is a front view of the drill bit 9 according to another embodiment, and (D) is a side view thereof.

The drill blade 8 shown in Fig. 8 (A) and (B) is composed entirely of a plate-like body with a constant thickness, and cutting blades 8b, 8b are formed on both sides of the lower center tip 8e. A notch 8c having a constant width is formed in the upper base end side in the center in the vertical direction, and engaging portions 8a, 8 fixed to the distal end of the anchor body are provided on both sides of the notch 8c. “a” is formed to have the same width.

This engaging portion 8a is fixed to a recess 42a formed at the tip of the force anchor main body. Because

The notch 8c is designed so that the tip of the driving bin can enter the notch 8c, so that the tip of the bin can function effectively when the tip of the anchor is expanded. ing.

The drill bit 9 shown in FIGS. 8 (C) and (D) is not a plate-like body having a constant thickness in a side view like the above-mentioned drill bit, but the lower distal end side is closer to the base end side. It also has a large thickness, is elliptical when viewed from the bottom, has a substantially conical shape as a whole, and has a shape close to the tip shape of a so-called self-drilling screw. Therefore, a step 9d is formed between the distal end and the proximal end.

Cutting blades 9b, 9b are formed on both sides of the right front side portion and the left rear side portion of FIG. 8 (C) on both sides of the center front end 9e on the front end side. The base portion above the step 9 d is formed of a plate-like body having a certain thickness, and a notch 9 c having a certain width is formed in the vertical direction, and engaging portions 9 a having the same width are formed on both sides thereof. , 9a are formed. These engaging portions 9a are fixed to the recesses 42a, 42a formed in the distal end portion 42 of the anchor body portion 40, and the notched portion 9c penetrates the distal end portion of the driving bin i. Is acceptable.

FIG. 9 is an explanatory view showing one method of fixing the drill blade to the tip of the fan-force main body. FIG. 9 (A) shows the case where the drill blade is arranged in a mold, and FIG. 4 is an explanatory view showing a state in which the distal end side of the anchor main body is formed by using FIG. 4, and (B) is a cross-sectional view of the distal end of the self-drilling anchor after the forming process.

The mold 63 has a cylindrical bottomed hole 63a at the center thereof, and a drill blade 8 is vertically formed at the bottom of the hole 63a in the diameter direction of the hole 63a. They are arranged in an upright position. The inner diameter of the hole of the mold 63 is substantially the same as the outer diameter of the distal end 42 of the anchor body.

Using this mold 63, the distal end portion 42 of the anchor main body is introduced into the hole 63a of the mold 63 to perform breath forging. As a result, the tip of the anchor body Simultaneously with the drawing of the part 42, the drill bit 8 is fixed to the tip part 42 of the anchor body.

As can be seen from the cross-sectional view of FIG. 9 (B), the engaging portions 8a, 8a on the proximal end side of the drill bit 8 bite into the distal end portion 42 of the main anchor portion, and the hole in the shaft core portion The part 15 is crushed from both sides.

In this anchor, the crushed hole 15 is expanded by driving a bin introduced from the upper end of the hole of the anchor body. As a result, the distal end 42 of the anchor body breaks along the imaginary lines R and S in the figure, and the broken line runs along the longitudinal direction of the distal end 42 of the anchor body. The tip 42 is pushed apart.

As a result, the anchor is fixed to a structure such as concrete, and at the same time, the object to be fixed is also fixed to the structure.

As shown in FIG. 9, at the distal end portion 42 of the anchor main body, the portion that crushes the hole 15 can be implemented not only at four places as in the above-described embodiment, but as in this embodiment, It may be two opposing locations. In short, it is sufficient that there are two or more places where the holes are crushed because of the fixation of the drill bit. In the mold 63 shown in FIG. 9, a ridge is further added in the hole 63 a of the mold 63, and the recesses 42 a May be provided. As described above, the embodiments of the present invention have been described. However, the embodiments can be modified as follows.

The material and size (outer diameter, inner diameter, wall thickness, length, etc.) of the pipe member 5 used in the present invention can be appropriately set as needed.

The lengths of the tip portions 12, 32, 42 of the shaft portions 11, 31, 41 can also be freely set, and the length of the slit 16 can be determined accordingly.

The length in the longitudinal direction of the outer peripheral surface 18 or the inner peripheral surface 19 where the screw thread is provided at the base end of the bristle portion 11 can also be freely set.

There are various types of upper die, lower die, and fixing dies used for die forging or breath forging. Can be used.

The forging process may be performed once or twice or more.However, when plastic working is performed by one forging, the hole 15 at the center of the pipe material may be crushed. In some cases, it is necessary to add a simple drilling operation. In the case of performing more precise processing, it may be performed three or more times. However, as shown in the embodiment, a sufficiently high anchor can be obtained by applying within two surfaces (double striking). be able to.

The step of forming the slit 16 at the tip of the chain can also be performed before the plastic working of the main anchor part as described above.

If the slit 16 is performed before the plastic working of the main body, the gap between the slits will be crushed and the gap will be lost, leaving the slit notch itself. Therefore, there is no problem when the widening part at the tip of the shaft is pushed out.

In the anchor shown in FIGS. 1 to 4, it is also possible to fix the drill 16 and 9 shown in FIG. 8 by sandwiching it with the slit 16 formed at the tip of the anchor. is there. Thereby, a self-drilling anchor having a self-drilling function can be easily manufactured. In this case, the shape of the head of the anchor

It is necessary to make the shape that can be engaged with the rotary engaging part of the rotary tightening tool by making the shape of the head of the hexagonal bolt the same. In addition, it is desirable to provide a groove and a ridge of a spiral strip for removing chips from the shaft of the anchor.

When fixing the drill blades 8 and 9 to the slit 16, various methods such as forcible fitting, caulking, brazing and the like can be performed.

Force that can change the shape of the heads 13, 33, and 43 in various ways In self-drilling anchors, the shape is such that the head can engage well with the image engagement portion of the rotary tightening tool. ' _Β needs to be

The length in the longitudinal direction of the recess 42 formed in the tip portion 42 of the tongue 41 can also be freely set as required, and the depth and width of the recess 42 can also be set as appropriate. Can be set to Also, the number of recesses may be two or more.

The shape of the drill bit can also be freely changed as needed. The drill bit has a cutout on the upper base side of the drill bit, into which a driving bin can enter, and anchors on both sides of the cutout. What is necessary is just to provide the engagement part which can be fixed to the tip of the one main part.

The present invention has the following effects.

In the first manufacturing method of the present invention, since a pipe material is used as a raw material, a hole has already been formed in advance, and the basic structure of the anchor body is obtained by performing simple plastic working. Since the basic form is formed, various types of anchors can be manufactured more easily without the necessity of a drilling operation for making a hole in the core of the pongee as in the past.

Further, in the conventional method, it was difficult to manufacture an anchor having a certain length or more, and the length was limited. However, in the manufacturing method according to the present invention, a long pipe material was used. The anchor may be used without any limitation, and any length of anchor can be manufactured by the manufacturing method according to the present invention. The fan according to the second aspect of the present invention manufactured by this manufacturing method can be manufactured more easily than the conventional anchor and can be implemented as a longer anchor. .

In the manufacturing method according to the third invention of the present application, the same effect as that of the first invention is obtained, and at the same time as the molding for reducing the inner diameter of the distal end portion side (expanded city) of the anchor body, Grooves and threads can be formed in the fins, and a means is provided to allow the ridges and the like provided there to satisfactorily catch on the structure when the flared portion is pushed out by driving a pin. can do.

Also in the method for manufacturing an anchor according to the fourth invention of the present application, since a pipe material is used as a material of the anchor main body, a drilling operation step of drilling a hole for inserting a bin is required. In addition, there is no need to provide a slit at the top of the 轴 part, and the shape of the main body of various anchors can be completed simply by plastic working such as fillet forging. In the manufacturing method according to the fifth invention of the present application, the so-called self-drilling, which has a function of forming a pilot hole at the tip of the shaft portion and forming a pilot hole in the fixed object and the structure at the same time as the formation of the single anchor portion, An anchor can be easily manufactured. Since the anchor according to the sixth invention of the present application uses a vibrating material as the material of the anchor main body, it does not require a drilling operation for drilling a hole for inserting a bottle. There is no need to provide a slit at the tip of the shaft, and it can be easily manufactured from pipe material by plastic working alone.

The anchor according to the seventh invention of the present application is a so-called self-drilling anchor. In addition to the effect of the sixth invention, a fixed object is provided because a drill blade is provided at the tip of the anchor. When fixing the anchor to a structure, the work of drilling the pilot hole with an electric drill or the like is not necessary in advance, and using this anchor, the object to be fixed is set on the structure, and It can be fixed to the fixed structure by drilling a pilot hole directly from the hole and then driving the bottle.

Claims

The scope of the claims

1. In the shaft of the shaft (11), there is a hole () for punching a bottle that is drilled from the upper base end of the shaft (11) to the lower end of the shaft (11). A slit (16) from the tip to the hole (15) is provided at the lower end of the hole (ι), and a bottle (1) is inserted from the upper end of the hole (15). ) In the method of manufacturing anchors for structures such as concrete in which

The metal body (5) of the appropriate length is used as the material of the anchor body (10), and the anchor part (11) of the anchor body (10) is formed by one or more times of plastic working. Forming on the distal end side and forming on the base end side of the anchor main rest part ο)

A method for producing an anchor, characterized in that a slit (16) is formed at the tip of a threaded portion α ι) before or after this plastic working.

2. In the shaft of the shaft (11), there is a hole (15) for punching a bottle, which is drilled from the upper base end of the bow (11) to the lower end of the chain (11). A slit (16) from the tip to the hole (15) is provided at the lower end of the shaft (11), and the upper end force of the hole (15) is In an anchor for a concrete structure such as concrete in which a bottle (1) is inserted,

Anchor rest part ο) is formed from metal pipe material (5),

The anchor body portion αο) has an expanded portion (14) formed by reducing at least the inner diameter of the distal end portion of the pipe member (5) by plastic working,

An anchor characterized in that the widened portion (14) has a slit (16) formed before or after the plastic working.

3. A hole for drilling a bottle (15) drilled from the upper base end of the lux part (11) to the lower end of the bow part (11) in the shaft core of the 轴 part (11). And a slit (16) from the tip to the hole (15) at the lower end of the shaft (11), and a pin from the upper end of the hole (15). (1) In the method of manufacturing an anchor for a structure such as concrete in which is inserted. hand,

The pipe material (5) is used as the material of the anchor body (10), and the pipe material (5) is cut into appropriate lengths.

A slit Q6) is formed at the tip of the pipe material (5),

At least the portion provided with the slit (16) is formed by rolling to form a groove or a screw thread, etc., and the pipe provided in the portion provided with the slit (16) at the same time by the plastic working. Method for producing an anchor, characterized by reducing the inner diameter of a material (5)

4. Prepare metal pipe material as the material of the anchor body (40),

Forming the tip (42) side of the anchor (41) of the anchor body (40) and the base end of the anchor body by one or more times of plastic working,

The inner diameter of the screw part (41) is reduced by forming the tip part (42) of the handle part (41), and the shaft 5) is inserted into the hole 5) from the base end of the anchor body (40) to the tip side. A method for manufacturing an anchor for a structure such as concrete, comprising a driving bin (1) for expanding a tip portion (4 2) of the part.

5. Place the drill blades (8) and (9) having the drilling function in the mold (63) in advance, and form the tip (42) of the Axis (41) of the anchor (40). 5. The method for manufacturing an anchor according to claim 4, wherein the drill blades (8) and (9) are fixed to a tip end portion (42) of a hook portion (41) at the same time.

6. Use metal pipe material as the material of the anchor body (40),

Forming the tip (42) side of the shaft (41) of the anchor body (40) and forming the base end side of the anchor body (40) by one or more plastic workings Do

The inner diameter of the shaft portion (41) is reduced by forming the tip (42) side of the shank portion (41), and a hole (15) extending from the base end side to the tip end side of the anchor main body (40) is formed. Tip (4 Anchors for structures such as concrete, which are equipped with a driving bin (1) for expanding 2).

7. The drilling device according to claim 6, wherein the drill bit (8) having a drilling function is fixed to the tip end of the shaft portion of the anchor body. Anker.