Driving member and method using the driving member

Abstract

The present invention provides a concrete chipping member and a concrete chipping method using the said member that do not reduce productivity as a chipping method, even when drilling work with large machinery is not possible, such as when the concrete to be chipped is small, for example, when breaking up small pieces of concrete or installing lightweight equipment associated with that, without resorting to manual drilling work. [Solution] The driving member has a rod-shaped main body with a pointed tip, a space provided in the axial direction of the driving member main body from the upper surface opening of the rear end towards the pointed end, and a fitting member that is fitted into the space, and the driving member main body is configured to expand in the width direction after being driven into concrete and after the fitting member is fitted into the space.

Description

Technical Field

[0001] The present invention relates to driving members and methods using driving members. Specifically, it relates to driving members and methods for hanging concrete using such driving members, or methods for forming locking portions on driven objects using driving members and such driving members.

[0002] Particularly, it relates to methods for hanging concrete during cross-section repair of concrete in renewal work of structures such as concrete structures, or driving members for forming locking portions for equipment installation on a concrete floor surface or structure as a driven object and methods for forming locking portions using such driving members.

Background Art

[0003] Many infrastructure facilities constructed during the period of high economic growth are aging, and in recent years, renewal work of the above-mentioned infrastructure facilities has been rapidly carried out. The work process of this infrastructure facility renewal work includes a process for repairing the cross-section of existing concrete, and approximately half of this work process is occupied by the hanging work of existing concrete.

[0004] The hanging work for cross-section repair of concrete is often carried out manually, which is heavy labor work and work accompanied by vibration, so it is a work with low labor productivity. Here, an example of the conventional hanging work for existing concrete will be described.

[0005] First, the concrete is drilled in advance with a drilling drill, and a pressing device such as a press device whose tip expands by, for example, hydraulic pressure is inserted into the drilled hole, and then the concrete surface is pressurized to separate the body layer and the surface concrete, thereby performing the work of hanging the concrete.

[0006] While the aforementioned conventional chipping method has the effect of suppressing noise and vibration, it requires a lot of labor to drill holes in the concrete surface to be repaired. In particular, when the concrete to be chipped is small, for example, when breaking up small pieces of concrete or installing lightweight equipment, drilling with large machinery cannot be performed, and most of the work has to be done by hand, which has resulted in extremely low productivity as a chipping method.

[0007] Furthermore, when forming anchoring parts for structural members or equipment on concrete floors or structures made of concrete, drilling holes in the concrete surface where the anchoring parts for equipment should be formed requires considerable effort. In particular, when the structure is small, drilling with large machinery is not possible, and most of the work has to be done manually. As a result, the productivity of anchoring and other locking part formation work has been extremely low. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2018-51688 [Overview of the project] [Problems that the invention aims to solve]

[0009] The present invention was devised to solve the aforementioned conventional problems, and aims to provide a concrete chipping member and a concrete chipping method using the said member that does not reduce productivity as a chipping method, even when drilling work with large machinery is not possible, such as when the concrete to be chipped is small, for example, when crushing small concrete or installing lightweight equipment, without resorting to manual drilling work. Furthermore, when forming a locking part for equipment installation on a concrete floor surface or a structure made of concrete, drilling work into the surface of the structure made of concrete to be formed for equipment installation is not required, and the present invention aims to provide a concrete chipping member and a method for forming a locking part on a structure to be chipped using the said chipping member that does not reduce productivity in the work of forming locking parts such as anchors, especially when the structure is small. [Means for solving the problem]

[0010] The present invention It comprises a driving member body that is rod-shaped with a pointed tip, a space provided in the axial direction of the driving member body from the upper opening of the rear end towards the pointed tip, and a fitting member that is fitted into the space. The aforementioned casting member body is configured to expand in the width direction after being cast into the concrete and after the fitting member is fitted into the space. It is characterized by the following: or It comprises a driving member body that is rod-shaped with a pointed tip, a space provided in the axial direction of the driving member body from the upper opening of the rear end towards the pointed tip, and a fitting member that has an exposed portion exposed to the outside and is fitted into the space, The main body of the embedded member is driven into the concrete so as to be able to be locked in place with the exposed portion of the embedded member exposed to the outside. It is characterized by the following: or The aforementioned casting member is driven into the concrete, then the fitting member is fitted into the space provided in the casting member, and the casting member is expanded in the width direction to chip away the poured concrete. It is characterized by the following: or The aforementioned casting member is driven into the concrete in which the reinforcing bars are embedded so that it reaches the vicinity of the reinforcing bars, and then the fitting member is fitted into the space provided in the casting member to expand the casting member in the width direction and chip away the concrete on the surface side from the reinforcing bars. It is characterized by the following: or The aforementioned driving member is driven into the concrete, and the driving member is locked into the concrete, and the fitting member is fitted into the space of the driving member with an exposed portion that is exposed to the outside. It is characterized by the following: [Effects of the Invention]

[0011] According to the present invention, even when the concrete to be chipped is small, for example, when drilling work with large machinery cannot be performed for breaking up small pieces of concrete or installing lightweight equipment, as in the conventional method, it is possible to provide a driving member and a concrete chipping method using the driving member that does not reduce the productivity of the chipping method by eliminating the need for manual drilling work. Furthermore, when forming a locking part for equipment installation on a concrete floor or a structure made of concrete, drilling work into the surface of the structure made of concrete where the locking part for equipment installation is to be formed is not required, and especially when the structure is small, it is possible to provide a driving member and a method for forming a locking part of the object to be driven using the driving member that does not reduce the productivity of the locking part formation work, such as anchors. [Brief explanation of the drawing]

[0012] [Figure 1]Explanatory drawing (1) for explaining the configuration of the driving member according to the first embodiment. [Figure 2] Explanatory drawing (2) for explaining the configuration of the driving member according to the first embodiment. [Figure 3] Explanatory drawing (1) for explaining the usage state of the first embodiment. [Figure 4] Explanatory drawing (2) for explaining the usage state of the first embodiment. [Figure 5] Explanatory drawing (3) for explaining the usage state of the first embodiment. [Figure 6] Explanatory drawing for explaining the configuration of the driving member according to the second embodiment.

Mode for Carrying Out the Invention

[0013] Hereinafter, the present invention will be described based on the embodiments shown in the drawings. Figs. 1 and 2 show the configuration of the driving member 1 according to the first embodiment of the present invention. The driving member 1 of the first embodiment is configured as a pointed end portion 2 with a pointed tip. This is to enable smooth insertion into the concrete when driving.

[0014] Further, the member main body 3 of the driving member 1 has a predetermined length and is configured in a rod shape. However, there is no limitation whatsoever on the external shape of the rod shape of the member main body 3. It may be cylindrical or polygonal, or may be formed in a strip-shaped rod.

[0015] And, as can be understood from the figure, a flange portion 4 that extends outward from the outer periphery of the upper surface may be provided on the upper surface of the rear end portion of the driving member 1. There is no limitation whatsoever on the shape of this flange portion 4, and it may be formed in a substantially circular shape or a angular shape. Further, this flange portion 4 may not be formed.

[0016] Furthermore, an opening 5 is provided approximately in the center of the width direction on the upper surface of the rear end of the driving member 1, and a space 6 is provided extending vertically downward from the opening 5 toward the tip end, communicating with the opening 5. In addition, a narrowing portion 7 is formed on the tip end side of the space 6, which narrows in the width direction toward the tip end.

[0017] Therefore, when a rod-shaped or plate-shaped inserting member 8, as shown in the figure, is inserted into the space 6, the main body 3 of the drive-in member 1 is configured to expand to the left and right in the width direction.

[0018] However, regarding the characteristics of the opening 5 and space 6 formed in the drive-in member 1 of the first embodiment, as can be understood from Figures 1 and 2, in order for the flange portion 4 and the member body 3 to expand to the left and right in the width direction, the opening 5 and space 6 must be groove-shaped in a direction substantially perpendicular to the direction of expansion to the left and right in the width direction. This is because the member body 3 will not expand to the left and right in the width direction unless the opening 5 and space 6 are groove-shaped.

[0019] Here, we will describe a method of using the driving member 1 according to the first embodiment to drive into the surface of the concrete member 9, inserting the fitting member 8 into the space 6 to expand the member body 3 in the width direction to the left and right, thereby chipping away at the surface of the concrete member 9.

[0020] Figures 3 to 5 show concrete members 9 whose surfaces need to be chipped away. In other words, because the surface has deteriorated, the surface portion is chipped away, and then repairs are carried out by pouring repair materials such as concrete or mortar onto the surface again.

[0021] The concrete member 9 shown in the diagram has reinforcing bars 10 embedded in it. In this case, the concrete will be chipped away down to the location of the reinforcing bars 10 embedded near the surface (the concrete cover), and then repaired by pouring concrete, mortar, or other repair materials onto the surface. Furthermore, the present invention can be applied even to concrete members 9 in which reinforcing bars 10 are not embedded.

[0022] The embedded member 1 of the present invention is manufactured in multiple types with different lengths, and in this embodiment, an embedded member 1 having a length that extends to the location of the reinforcing bar 10 embedded near the surface is selected and used.

[0023] However, as shown in the figure, for example, a nailing tool 11 is used to drive the driving member 1 into the surface of the concrete member 9. The driving member 1 is provided with the flange portion 4 described above, and the flange portion 4 engages with the surface of the concrete member 9, so that the main body portion 3 of the driving member 1 is driven into the concrete member 9. As mentioned above, while the presence of the flange portion 4 is preferable, it is not necessarily required to be formed.

[0024] In the case of a roughly rectangular concrete member 9 as shown in the diagram, the concrete members 9 are driven in from the end side, i.e., the free end side. This is because cracks are less likely to occur in the concrete member 9 if the concrete is driven in from the center. Therefore, the concrete is driven in from the so-called end. Then, the concrete is driven in gradually towards the center.

[0025] After being driven in, the fitting member 8 is fitted into the space 6. When the fitted fitting member 8 passes through the narrowed portion 7 of the space 6, it presses against both sides of the narrowed portion 7, causing the driven in member 1 to expand in the width direction to the left and right.

[0026] As shown in Figures 4 and 5, the cast-in members 1 are cast in at multiple locations. As shown in Figure 4, it is preferable to cast them at the center of the grid of reinforcing bars 10 that are embedded in a grid pattern intersecting within the concrete member 9. When this is done, continuous cracks 12 extending laterally are likely to occur, as shown in Figure 4. In order to create such continuous cracks 12 extending laterally, the cast-in member 1 should be selected to have a strip-shaped body, and the cast-in member 1 should be positioned and cast so that the direction in which the body of the member 3 expands is laterally. This makes it possible to generate a series of cracks 12 running horizontally, as shown in Figure 4.

[0027] Furthermore, as shown in Figure 5, since the same length of driving members 1 are used for driving, continuous cracks 12 are generated near the reinforcing bars 10 embedded close to the surface. In other words, cracks 12 are generated only in the areas of the cover that need to be chipped away. However, in order to reliably and quickly drive multiple driving members 1 to the same depth, it is preferable to use driving members 1 of the same length and to use driving members 1 having a flange portion 4. This is because the flange portion 4 allows for the same driving depth control for multiple driving members 1 being driven.

[0028] Furthermore, in order to efficiently generate cracks, it is preferable to sequentially drive the casting members 1 starting from near the open end (the end of the concrete member 9). That is, by driving the casting members 9 near the open end, cracks will start from the open end, and by sequentially driving the casting members in such a way that the cracks will spread from that crack to the entire chipping area, cracks can be generated effectively. Alternatively, if there is no open end, an open end may be formed by cutting a predetermined part of the concrete member 9, and then the casting members may be driven starting from near that open end.

[0029] Next, the drive-in member 1 of the second embodiment will be described. Figure 6 shows a second embodiment, specifically an example where the embedded member 1 is used as an anchor in the concrete member 9.

[0030] The driving member 1 in the second embodiment is configured as a pointed tip 2, similar to the first embodiment. This is to allow it to smoothly fit into the concrete when driven in.

[0031] Furthermore, the member body 3 of the driving member 1 in this embodiment is also configured in a rod shape with a predetermined length. However, the external shape of the rod-shaped member body 3 is not limited in any way; it may be cylindrical or polygonal prism-shaped, or it may be formed in the shape of a strip rod. However, considering the difficulty of it coming loose after being driven in, it is preferable that it be cylindrical or polygonal prism-shaped.

[0032] In this second embodiment, the driving member 1 may also be provided with a flange portion 4 that extends outward from the outer circumference of the upper surface on the upper surface of the rear end of the driving member 1. There are no restrictions on the shape of this flange portion 4; it may be formed in a substantially circular shape or in a square shape. However, the flange portion 4 may not be formed at all.

[0033] Furthermore, an opening 5 is provided approximately in the center of the width direction on the upper surface of the rear end of the drive-in member 1, and a space 6 is provided that extends vertically downward from the opening 5 toward the tip end, communicating with the opening 5. A female thread 14 is threaded into the inner circumferential surface of the space 6. Within the space 6 where the female thread 14 is threaded, there is a fitting member 8 that has an exposed portion 13 that is exposed to the outside and a male thread 15 on its outer circumferential surface that is screwed into the space 6.

[0034] Here, we will describe a method of using the driving member 1 according to the second embodiment, in which the driving member 1 is driven into the surface of a concrete member 9, which is an example of a body to be driven, and the fitting member 8 is screwed into the space 6 to expose the exposed portion 13 to the outside.

[0035] The driven member 1 of the second embodiment is mainly used as an installation member for post-installed anchors, such as hole-in anchors, when installing equipment in concrete structures, rock formations, and other objects to be driven. Conventionally, holes were drilled in advance and anchors were pressed into the drilled holes, but by driving the anchor directly without drilling, anchor installation becomes possible, and the labor and time required for drilling is eliminated very effectively. Furthermore, the so-called "hammering work" that was conventionally performed after anchor installation can also be made more efficient, resulting in a dramatic improvement in productivity.

[0036] First, for example, using a nailing tool 11, the driving member 1 is driven into the surface of a concrete member 9, which is an example of a body to be driven into. The driving member 1 may be one that has the flange portion 4 described above, or it may be a driving member 1 without the flange portion 4. With the driving member 1 of this embodiment, the driving member 1 can be driven into the concrete member 9 in a single strike using the illustrated nailing tool 11. This is the reason for the reduction in working time.

[0037] After driving it in, the fitting member 8 with the male thread 15 is screwed into the space 6 with the female thread 14. At this time, the exposed portion 13 is left exposed to the outside. This exposed portion 13 serves as a locking part for attaching the equipment.

[0038] In this embodiment, the fitting member 8 is fixed and locked in the space 6 by the screwing of a screw, but this is by no means limited to fixing and locking by screwing. The fitting member 8 may be pushed into the space 6 and fixed and locked in place, or instead of screwing, the space 6 and the fitting member 8 may be provided with locking or engaging parts that engage or interlock with each other, thereby fixing and locking the fitting member 8. [Explanation of Symbols]

[0039] 1. Insertion member 2 Tip 3. Main body component 4. Guard section 5 Openings 6 Space 7 Stenosis 8. Insertion Member 9 Concrete members 10 Reinforcement muscles 11 Nail gun 12. Cracks 13 Exposed part 14 Female thread 15 Male screw

Claims

1. It comprises a driving member body that is rod-shaped with a pointed tip, a space provided in the axial direction of the driving member body from the upper opening of the rear end towards the pointed tip, and a fitting member that is fitted into the space. The aforementioned casting member body is configured to expand in the width direction after being cast into the concrete and after the fitting member is fitted into the space. A drive-in member characterized by the following features.

2. It comprises a driving member body that is rod-shaped with a pointed tip, a space provided in the axial direction of the driving member body from the upper opening of the rear end towards the pointed tip, and a fitting member that has an exposed portion exposed to the outside and is fitted into the space, The driving member body is driven into the body to be driven so as to be locked into the body to be driven, with the exposed portion of the fitting member exposed to the outside. A driving member characterized by the following features.

3. The casting member described in claim 1 is cast into the concrete, then the fitting member is fitted into the space provided in the casting member, and the casting member is expanded in the width direction to chip away the cast concrete. A concrete chipping method using a cast-in member characterized by the above.

4. The casting member described in claim 1 is driven into the concrete in which the reinforcing bars are embedded so as to reach the vicinity of the reinforcing bars, and then the fitting member is fitted into the space provided in the casting member to expand the casting member in the width direction and chip away the concrete on the surface side from the reinforcing bars. A concrete chipping method characterized by the features described herein.

5. The driving member described in claim 2 is driven into the body to be driven, the driving member is locked into the body to be driven, and the fitting member is fitted into the space of the driving member with an exposed portion that is exposed to the outside. A method for forming a locking portion of an object to be driven in, characterized by the use of a driving member.

Images