Pressurizing structure for pressurized member, pressurizing tool, and pressurizing method

Abstract

To provide a pressurizing structure, a pressurizing tool, and a pressurizing method for a pressurized member that prevent the pressurized member from being damaged.SOLUTION: A pressurizing structure 10 of a pressurized member comprises a pressurized member 12, a pair of end members 14 arranged on both sides of the pressurized member 12 while being in contact with the pressurized member 12, and a connecting member 16 connecting the pair of end members 14. Each end member 14 has a base part 18 facing the pressurized member and a plurality of protruding parts 20 protruding from the base part so as to sandwich the pressurized member. The end member 14 pressurizes the pressurized member 12 in the direction of a tensioning force by applying tension to the connecting member 16, and the protruding parts 20 also pressurize the pressurized member 12 inward in a direction crossing the direction of the tensioning force.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pressurizing structure, a pressurizing tool, and a pressurizing method for a pressurized member that is pressurized for reinforcement or the like.

Background Art

[0002] Conventionally, prestressed concrete to which prestress is applied for reinforcement has been widely used. In prestressed concrete, PC steel materials are installed in the concrete member in a tensioned state. In addition, PC steel materials or the like may be attached to the outside or inside of columns or beams for repair or reinforcement after the concrete columns and beams are installed. Also, a similar pressurizing structure may be used for reinforcing natural stone or the like. The PC steel material is fixed on the surface of the pressurized member such as a concrete member or in its vicinity, and stress concentration is likely to occur at the fixing portion. Such stress concentration can cause damage to the pressurized member.

[0003] On the other hand, a structure is known in which a member such as a plate is installed on the surface of the pressurized member, and the PC steel material or the like is fixed to the pressurized member via the plate or the like (see, for example, Patent Documents 1 to 4). By fixing the PC steel material or the like via a member such as a plate having a large contact area, stress concentration at the fixing portion of the PC steel material or the like is reduced.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, even in a structure where a PC steel material or the like is fixed to a pressurized member via a member such as a plate, another type of stress concentration or damage may occur in the pressurized member. For example, in a structure where a tension member is installed outside a concrete member as shown in FIG. 3 of Patent Document 4, the bearing beam deforms so as to bend due to the tension force of the tension member. Therefore, the inventor has found that while compressive stress concentrates on the peripheral edge of the concrete member, tensile stress tends to concentrate on the central part of the surface. In materials such as concrete, stone, glass, and ceramic where the tensile strength is significantly lower than the compressive strength, there is a possibility that damage may occur at the central part of the surface of the pressurized member due to the tensile stress. In addition, although the pressurized member such as concrete has a high compressive strength, there is a possibility that damage may occur at the peripheral edge due to the compressive stress. Further, when a PC steel material or the like is installed along the length direction inside a rod-shaped pressurized member such as a column or a beam and the PC steel material or the like is fixed via a plate or the like at both end faces of the pressurized member, when an external force acts on the pressurized member, the pressurized member deforms so as to bend, and a member such as a plate strongly abuts against the peripheral edge inside the bend at both end faces of the pressurized member, and compressive stress concentrates. There is a possibility that damage may occur at the peripheral edge due to this compressive stress. The present invention has been made in view of the above problems, and an object thereof is to provide a pressurizing structure, a pressurizing tool, and a pressurizing method for a pressurized member in which damage to the pressurized member is less likely to occur than in the prior art.

Means for Solving the Problems

[0006] The present invention includes a pressurized member, a pair of end members installed in contact with the pressurized member on both sides of the pressurized member, and a connecting member that connects the pair of end members. The end member has a base portion facing the pressurized member and a plurality of protruding portions protruding from the base portion so as to sandwich the pressurized member. By applying a tension force to the connecting member, the end member pressurizes the pressurized member in the direction of the tension force, and the protruding portion also pressurizes the pressurized member inward in a direction intersecting the direction of the tension force. The above problems are solved by the pressurizing structure of the pressurized member.

[0007] In this pressurized member's pressurization structure, since the protruding portion of the end member pressurizes the pressurized member inward in a direction intersecting the direction of the tensile force when the connecting member is applied with the tensile force, damage to the peripheral edge of the contact surface between the end member and the pressurized member in the pressurized member is less likely to occur. Further, when the connecting member is installed outside the pressurized member, a force that bends the end member acts when the connecting member is applied with the tensile force, but the bending of the end member is suppressed by the protruding portion of the end member. Furthermore, when the connecting member is applied with the tensile force, the protruding portion of the end member pressurizes the pressurized member inward in a direction intersecting the direction of the tensile force. Therefore, tensile stress is less likely to occur at the central portion of the contact surface between the end member and the pressurized member in the pressurized member, and damage to the central portion of the surface of the pressurized member is less likely to occur.

[0008] The connecting member may be installed outside the pressurized member and connected to the protruding portion of the end member. When the connecting member is installed outside the pressurized member, the protruding portion can pressurize the pressurized member inward in a direction intersecting the direction of the tensile force due to the simple structure in which the connecting member is connected to the protruding portion of the end member. Also, the attachment and detachment of the end member and the connecting member are easy, and the pressurized member can be easily reinforced. Therefore, it can be easily used, for example, for reinforcing the pressurized member when lifting or transporting the pressurized member.

[0009] In this case, the pressurized member may be a member having a quadrangular cross-sectional shape, and the end member may be a member having a U-shaped cross-sectional shape. In the case of a pressurized member having a quadrangular cross-sectional shape, the protruding portion of the end member can pressurize the pressurized member inward in a direction intersecting the direction of the tensile force by such an end member having a simple configuration.

[0010] Also, the pressurized member may be a member having a circular or elliptical cross-sectional shape, the base portion of the end member may be a circular or elliptical plate-like body corresponding to the cross-sectional shape of the pressurized member, and a plurality of protruding portions may be intermittently provided along the outer peripheral portion of the base portion. Also in the case of a pressurized member having a circular or elliptical cross-sectional shape, the protruding portion of the end member can pressurize the pressurized member inward in a direction intersecting the direction of the tensile force by such an end member having a simple configuration.

[0011] Furthermore, a spacer installed between the protruding portion of the end member and the member to be pressurized may be further provided. Even if there are variations in the dimensions of the member to be pressurized, by adjusting the thickness of the spacer, the protruding portion can surely pressurize the member to be pressurized inward in a direction intersecting with the direction of the tensile force. Also, since a common end member can be used even if there are variations in the dimensions of the member to be pressurized, the versatility can be enhanced.

[0012] Also, the connecting member may be installed inside the member to be pressurized and connected to the end member, and tapered surfaces are formed on the protruding portion of the end member and the member to be pressurized. The end member and the member to be pressurized come into contact on these tapered surfaces, so that the protruding portion pressurizes the member to be pressurized in the direction of the tensile force and also pressurizes the member to be pressurized inward in a direction intersecting with the direction of the tensile force. Even when the connecting member is installed inside the member to be pressurized, with such a simple structure, the protruding portion of the end member can pressurize the member to be pressurized inward in a direction intersecting with the direction of the tensile force.

[0013] Furthermore, the present invention includes a member to be pressurized, a pair of end members installed in contact with the member to be pressurized on both sides of the member to be pressurized, and a connecting member connecting the pair of end members. The end member has a base portion facing the member to be pressurized and a protruding portion protruding from the base portion along the outer periphery of the member to be pressurized. Tapered surfaces are formed on the protruding portion of the end member and the member to be pressurized. The end member and the member to be pressurized come into contact on these tapered surfaces, and when a tensile force is applied to the connecting member, the protruding portion pressurizes the member to be pressurized in the direction of the tensile force and also pressurizes the member to be pressurized inward in a direction intersecting with the direction of the tensile force, thereby solving the above problems in the pressurizing structure of the member to be pressurized.

[0014] This pressurizing structure of the member to be pressurized is also configured such that when a tensile force is applied to the connecting member, the protruding portion of the end member also pressurizes the member to be pressurized inward in a direction intersecting with the direction of the tensile force. Therefore, damage to the peripheral portion of the contact surface of the member to be pressurized with the end member is less likely to occur.

[0015] Furthermore, the present invention provides a pressurizing tool having the end member and the connecting member described in any of the above.

[0016] Further, the present invention includes a mounting step of installing a pair of end members in contact with the member to be pressurized on both sides of the member to be pressurized and connecting the pair of end members with a connecting member, and a tension applying step of applying a tension to the connecting member. The end member has a base portion facing the member to be pressurized and a plurality of protruding portions protruding from the base portion so as to sandwich the member to be pressurized. By applying a tension to the connecting member in the tension applying step, the end member pressurizes the member to be pressurized in the direction of the tension, and the protruding portion also pressurizes the member to be pressurized inward in a direction intersecting the direction of the tension. A method for pressurizing a member to be pressurized is provided.

[0017] Further, the present invention includes a mounting step of installing a pair of end members in contact with the member to be pressurized on both sides of the member to be pressurized and connecting the pair of end members with a connecting member, and a tension applying step of applying a tension to the connecting member. The end member has a base portion facing the member to be pressurized and a plurality of protruding portions protruding from the base portion along the outer periphery of the member to be pressurized. Tapered surfaces are formed on the protruding portions of the end member and the member to be pressurized, and the end member and the member to be pressurized are in contact with each other on these tapered surfaces. By applying a tension to the connecting member in the tension applying step, the protruding portion pressurizes the member to be pressurized in the direction of the tension, and also pressurizes the member to be pressurized inward in a direction intersecting the direction of the tension. A method for pressurizing a member to be pressurized is provided.

Advantages of the Invention

[0018] According to the present invention, it is possible to realize a pressurizing structure, a pressurizing tool, and a pressurizing method for a member to be pressurized in which damage to the member to be pressurized is less likely to occur.

Brief Description of the Drawings

[0019]

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Modes for Carrying Out the Invention

[0020] As shown in FIGS. 1 to 4, the pressing structure 10 of the member to be pressed according to the first embodiment of the present invention includes a member to be pressed 12, a pair of end members 14 that are installed in contact with the member to be pressed 12 on both sides of the member to be pressed 12, and a connecting member 16 that connects the pair of end members 14. The end member 14 has a base 18 facing the member to be pressed 12 and two protrusions 20 protruding from the base 18 so as to sandwich the member to be pressed. When a tensile force is applied to the connecting member 16, the end member 14 presses the member to be pressed 12 in the direction of the tensile force, and the protrusion 20 also presses the member to be pressed 12 inward in a direction intersecting the direction of the tensile force.

[0021] The member to be pressed 12 is a rod-shaped body having a rectangular (quadrilateral) cross-sectional shape. The material of the member to be pressed 12 is, for example, stone, concrete, glass, or ceramic. Note that the material of the member to be pressed 12 may be resin, wood, or metal.

[0022] The pair of end members 14 are installed at both ends in the length direction of the member to be pressed 12. The end member 14 is a member having a U-shaped cross-sectional shape. The base 18 is a rectangular plate-shaped body having substantially the same shape as the cross-sectional shape of the member to be pressed 12. The base 18 is in contact with the end face in the length direction of the member to be pressed 12, and the pair of protrusions 20 are in contact with the end faces in the thickness direction of the member to be pressed 12. The inner width of the pair of protrusions 20 is substantially the same as the thickness of the member to be pressed 12. Also, the length of the groove inside the end member 14 is substantially the same as the width of the member to be pressed 12. A hole 20A penetrating in the protruding direction (the longitudinal direction of the member to be pressed 12) is formed in the protrusion 20. Four holes 20A are formed in each protrusion 20 side by side in the extending direction of the groove of the end member 14. The material of the end member 14 is, for example, steel.

[0023] The connecting member 16 is an elongated round bar-shaped body installed outside the pressurized member 12 and is connected to the protruding portion 20 of the end member 14. In the first embodiment, eight connecting members 16 are provided. The connecting member 16 has a fixing member 16A, which passes through the hole 20A of the protruding portion 20 of the end member 14 and is fixed by the fixing member 16A on the end face of the end member 14. The material of the connecting member 16 is, for example, PC steel. The fixing member 16A is, for example, a nut. The end member 14 and the connecting member 16 constitute a pressure tool 22.

[0024] Next, a method for pressurizing a pressurized member using the pressure tool 24 will be described with reference to the flowchart of FIG. 5. First, a pair of end members 14 are installed in contact with the pressurized member 12 on both sides in the longitudinal direction of the pressurized member 12, and the pair of end members 14 are connected by the connecting member 16 and fixed by the fixing member 16A (S102: mounting step). Next, the fixing member 16A is tightened to apply a tensile force to the connecting member 16 (S104: tensile force applying step). When a tensile force is applied to the connecting member 16 in the tensile force applying step S104, as shown in FIG. 4, the base portion 18 of the end member 14 pressurizes the pressurized member 12 in the direction of the tensile force, and the protruding portion 20 also pressurizes the pressurized member 12 inward in a direction intersecting the direction of the tensile force.

[0025] Next, the operation and effect of the pressing structure 10 of the member to be pressed will be described. Since the pressing structure 10 of the member to be pressed is configured such that when a tensile force is applied to the connecting member 16, the protruding portion 18 of the end member 14 also presses the member to be pressed 12 inward in a direction intersecting the direction of the tensile force, damage to the peripheral edge of the contact surface of the member to be pressed 12 with the end member 14 is less likely to occur. Further, since the connecting member 16 is installed outside the member to be pressed 14, when a tensile force is applied to the connecting member 16, a force that bends the end member 14 acts. However, since the end member 14 has a pair of protruding portions 20 that protrude from the base portion 18 so as to sandwich the member to be pressed 12, the bending of the end member 14 is suppressed by the protruding portions 20. Furthermore, when a tensile force is applied to the connecting member 16, the protruding portion 20 also presses the member to be pressed 12 inward in a direction intersecting the direction of the tensile force. Therefore, tensile stress is less likely to occur in the central portion of the contact surface (the end face in the longitudinal direction of the member to be pressed 12) of the member to be pressed 12 with the end member 14, and damage to the central portion of the contact surface is also less likely to occur. Also, since the pressure tool 22 (the end member 14 and the connecting member 16) can be easily attached and detached, the member to be pressed 12 can be easily reinforced. For example, it can be easily used for reinforcing the member to be pressed 12 when lifting or transporting the member to be pressed 12.

[0026] Next, a second embodiment of the present invention will be described. As shown in FIGS. 6 to 8, the pressing structure 30 of the pressed member in the second embodiment includes an end member 32 instead of the end member 14 in the first embodiment. Since the other configurations are the same as those in the first embodiment, the same configurations will be denoted by the same reference numerals as in FIGS. 1 to 4, and the description thereof will be omitted. The end member 32 has a base 34 and two protruding portions 36 similar to the base 18 and the two protruding portions 20 of the end member 14, and in addition to these, it further includes two protruding portions 38. A pair of protruding portions 36 sandwich the surfaces of the pressed member 12 in the thickness direction. On the other hand, a pair of protruding portions 38 sandwich the surfaces of the pressed member 12 in the width direction. Four holes 36A similar to the holes 20A of the protruding portion 20 of the end member 14 in the first embodiment are formed in each protruding portion 36. Also, one hole 38A is formed in each protruding portion 38. In the second embodiment, ten connecting members 16 are provided, which are inserted through the holes 36A and 38A of the protruding portions 36 and 38 and fixed by fixing members 16A on the end surface of the end member 32. The end member 32 and the connecting member 16 constitute a pressing tool 40. Note that, also in the second embodiment, the pressed member 12 is pressed by the same method of pressing the pressed member as in the first embodiment.

[0027] Next, the operation and effect of the pressing structure 30 of the pressed member will be described. The pressing structure 30 of the pressed member has the protruding portion 38 in addition to the protruding portion 36 in the end member 32, and the connecting member 16 is installed not only on the protruding portion 36 but also on the protruding portion 38, so that the pressed member 12 is reinforced against bending in two directions. Therefore, the degree of freedom in the posture of the pressed member 12 when the pressed member 12 is lifted or transported is high. Also, similar to the pressing structure 10 of the pressed member in the first embodiment, damage to the peripheral portion and the central portion of the contact surface between the end member 32 and the pressed member 12 in the pressed member 12 is less likely to occur.

[0028] Next, a third embodiment of the present invention will be described. As shown in FIGS. 9 and 10, the pressurizing structure 50 of the pressurized member in the third embodiment includes a pressurized member 52 and an end member 54 instead of the pressurized member 12 and the end member 14 in the first embodiment. Since the other configurations are the same as those in the first embodiment, the same configurations will be denoted by the same reference numerals as in FIGS. 1 to 4, and the description thereof will be omitted. The pressurized member 52 in the third embodiment is a rod-shaped body having a circular cross-sectional shape. The end member 54 includes a base 56 and four protrusions 58. The base 56 is a circular plate-shaped body having substantially the same shape as the cross-sectional shape of the pressurized member 12. The four protrusions 58 are integrally provided at equal intervals in the circumferential direction on the outer periphery of the base 56. The end member 54 is installed so that the four protrusions 58 sandwich the side surface of the pressurized member 52. One hole 58A is formed in each protrusion 58. In the third embodiment, four connecting members 16 are provided. The connecting member 16 is inserted through the hole 58A and fixed by a fixing member 16A at the end face of the end member 54. The end member 54 and the connecting member 16 constitute a pressurizing tool 60. Note that, also in the third embodiment, the pressurized member 52 is pressurized by the same method of pressurizing the pressurized member as in the first embodiment.

[0029] Next, the operation and effects of the pressurizing structure 50 of the pressurized member will be described. Similar to the pressurizing structure 10 of the pressurized member in the first embodiment, the pressurizing structure 50 of the pressurized member is less likely to cause damage to the peripheral edge or the central portion of the contact surface between the pressurized member 52 and the end member 54. Further, since the four protrusions 58 and the four connecting members 16 are installed at equal intervals in the circumferential direction, the pressurized member 12 is reinforced against bending in all directions. Therefore, the degree of freedom in the posture of the pressurized member 12 when the pressurized member 52 is lifted or transported is high.

[0030] Next, a fourth embodiment of the present invention will be described. As shown in FIGS. 11 to 13, the pressing structure 70 of the pressed member in the fourth embodiment includes an end member 72 and a connecting member 74 instead of the end member 14 and the connecting member 16 in the first embodiment. Since the other configurations are the same as those in the first embodiment, the same configurations will be denoted by the same reference numerals as in FIGS. 1 to 4, and the description thereof will be omitted. In the first embodiment, the end member 14 is installed at both ends in the length direction of the pressed member 12, whereas the end member 72 in the fourth embodiment is installed at both ends in the width direction of the pressed member 12. Also, in the fourth embodiment, two pairs of end members 72 are installed near both ends in the length direction of the pressed member 12. The end member 72 is a member having a U-shaped cross section, and includes a base portion 76 and a protruding portion 78. The base portion 76 is in contact with the end face in the width direction of the pressed member 12, and the pair of protruding portions 78 sandwich both surfaces in the thickness direction of the pressed member 12. The inner width of the pair of protruding portions 78 is substantially the same as the thickness of the pressed member 12. One hole 78A penetrating in the protruding direction (width direction of the pressed member 12) is formed in each protruding portion 78. The connecting member 74 in the fourth embodiment has a configuration in which the connecting member 16 in the first embodiment is shortened, and includes a fixing member 74A similar to the fixing member 16A. In the fourth embodiment, four connecting members 74 are provided, and are inserted through the holes 78A of the protruding portions 78 and fixed by the fixing members 74A at the end faces of the end members 72. The end member 72 and the connecting member 74 constitute a pressing tool 80. Note that, also in the fourth embodiment, the pressed member 12 is pressed by the same method of pressing the pressed member as in the first embodiment.

[0031] Next, the operation and effect of the pressing structure 70 of the member to be pressed will be described. Similar to the pressing structure 10 of the member to be pressed in the first embodiment, the pressing structure 70 of the member to be pressed is less likely to cause damage to the peripheral edge or the central portion of the contact surface with the end member 72 in the member to be pressed 12. Further, since the end members 72 are arranged at both ends in the width direction of the member to be pressed 12, for example, when the member to be pressed 12 is a column or a beam that has already been installed, it is easy to install the pressing tools 80 (end members 72 and connecting members 74) for repair and reinforcement. In the fourth embodiment, two pairs of end members 72 are installed near both ends in the length direction of the member to be pressed 12, and in each case, the end members 72 are arranged so as to sandwich both surfaces in the width direction of the member to be pressed 12. However, the end members may be arranged so as to sandwich both surfaces in the thickness direction of the member to be pressed 12. Further, for example, a configuration may be adopted in which one pair of end members is arranged so as to sandwich both surfaces in the width direction of the member to be pressed, and the other pair of end members is arranged so as to sandwich both surfaces in the thickness direction of the member to be pressed. Also, in this case, the two pairs of end members may be arranged close to each other. By doing so, it is possible to reinforce the member to be pressed in two directions. Further, a configuration may be adopted in which two pairs of end members arranged close to each other in this manner are regarded as one set, and a plurality of sets are arranged in parallel along the length direction of the member to be pressed. By doing so, it is possible to reinforce the member to be pressed in two directions over the entire length direction of the member to be pressed.

[0032] Next, a fifth embodiment of the present invention will be described. As shown in FIGS. 14 to 16, the pressurizing structure 90 of the pressurized member in the fifth embodiment includes a pressurized member 92 instead of the pressurized member 12 in the fourth embodiment. Since the other configurations are the same as those in the fourth embodiment, the same configurations will be denoted by the same reference numerals as in FIGS. 11 to 13, and the description thereof will be omitted. The pressurized member 12 in the fourth embodiment is a rod-shaped body having a rectangular (quadrangular) cross-sectional shape, whereas the pressurized member 92 in the fifth embodiment has a shape in which the pressurized member 12 is shortened in the length direction. Further, the pressurized member 92 has a first member 92A and a second member 92B, and these are adhered to each other. The pressure tool 80 is used for pressurizing when the first member 92A and the second member 92B are adhered. Note that the pressure tool 80 may be removed after adhesion. Further, the pressure tool 80 may be used as a structural element for reinforcing the pressurized member 92 even after adhesion. Even when the pressure tool 80 is used for pressurizing at the time of adhesion in this way, there is an advantage that breakage of the peripheral portion or the central portion of the contact surface with the end member 72 in the pressurized member 92 is less likely to occur, similar to the pressurizing structure 70 of the pressurized member in the fourth embodiment.

[0033] Next, a sixth embodiment of the present invention will be described. In the first embodiment, the pair of protruding portions 20 of the end member 14 are in contact with the end surfaces in the thickness direction of the pressurized member 12. On the other hand, as shown in FIG. 17, the pressurizing structure 100 of the pressurized member in the sixth embodiment further includes a spacer 102 installed between the protruding portion 20 of the end member 14 and the pressurized member 12, and the protruding portion 20 is configured to pressurize the pressurized member 12 via the spacer 102. In the sixth embodiment, the inner width of the pair of protruding portions 20 is slightly wider than the thickness of the pressurized member 12. The spacer 102 is a rectangular plate-like body. The spacer 102 constitutes a pressure tool 22 together with the end member 14 and the connecting member 16. The material of the spacer 102 is, for example, a steel material. Note that also in the sixth embodiment, the pressurized member 12 is pressurized by the same pressurizing method of the pressurized member as in the first embodiment, and the spacer 102 is installed between the protruding portion 20 of the end member 14 and the pressurized member 12 in the mounting step S102. Since the other configurations are the same as those in the first embodiment, the same configurations will be denoted by the same reference numerals as in FIGS. 1 to 5, and the description thereof will be omitted.

[0034] Even if there are variations in the dimensions of the pressurized member 12, by adjusting the thickness of the spacer 102, the protruding portion 20 can surely press the pressurized member 12 inward in a direction intersecting the direction of the tension force of the connecting member 16. Also, since the common end member 14 can be used even if there are variations in the dimensions of the pressurized member 12, the versatility is high. Note that a plurality of types of spacers 102 having different thicknesses may be prepared in advance. Also, a configuration may be adopted in which a plurality of spacers are stacked and installed between the protruding portion 20 of the end member 14 and the pressurized member 12, and the total thickness may be adjusted by appropriately selecting the thickness and number of the spacers. Although FIG. 17 shows an example in which the spacer 102 is installed between one protruding portion 20 of the end member 14 and the pressurized member 12, the spacer 102 may be installed between both protruding portions 20 of the end member 14 and the pressurized member 12. Further, the above is an example in which the spacer is applied to the first embodiment, but the same spacer may be applied to the second to fifth embodiments.

[0035] Next, a seventh embodiment of the present invention will be described. In the first to sixth embodiments, the connecting members 16 and 74 are installed outside the pressurized members 12, 52, and 92. On the other hand, as shown in FIGS. 18 to 21, in the pressurizing structure 110 of the pressurized member of the seventh embodiment, the connecting member 16 is installed inside the pressurized member 112. The pressurized member 112 is a rod-shaped body having a rectangular cross-sectional shape similar to the pressurized member 12 of the first embodiment. Four holes 112A penetrating in the length direction are formed at the center in the thickness direction in the pressurized member 112. The four holes 112A are formed side by side in the width direction. In the seventh embodiment, four connecting members 16 are provided, and the connecting members 16 penetrate through the holes 112A. Note that when the material of the pressurized member 112 is concrete, the holes 112A are formed by pouring concrete with the connecting members 16 arranged. Also, when the material of the pressurized member 112 is a stone material or the like, the holes 112A are formed by a drill or the like. Also, the corners on both sides in the thickness direction of the end faces in the length direction of the pressurized member 112 are tapered surfaces.

[0036] A pair of end members 114 are installed at both ends in the length direction of the pressurized member 112. The end member 114 is a member having a substantially U-shaped cross section, and includes a base 118 facing the pressurized member, and two protrusions 120 protruding from the base 118 so as to sandwich the pressurized member. The inner surfaces of the pair of protrusions 120 are tapered surfaces, and are in contact with the tapered surface of the pressurized member 112 on these tapered surfaces. Note that the base 118 is disposed with a gap between it and the end surface in the length direction of the pressurized member 112. The length of the groove inside the end member 114 is substantially the same as the width of the pressurized member 112. Further, a hole 118A penetrating in the longitudinal direction of the pressurized member 112 is formed in the base 118. Four holes 118A are formed in the base 118 side by side in the extending direction of the groove of the end member 114. The connecting member 16 is inserted through the hole 118A and fixed by a fixing member 16A at the end surface of the end member 114. The end member 114 and the connecting member 16 constitute a pressure tool 122. Note that in the seventh embodiment as well, the pressurized member 112 is pressurized by the same method of pressurizing the pressurized member as in the first embodiment.

[0037] Next, the operation and effect of the pressurizing structure 110 of the pressurized member will be described. In the pressurizing structure 110 of the pressurized member, when a tensile force is applied to the connecting member 16, the tapered surface of the protrusion 120 of the end member 114 pressurizes the tapered surface of the pressurized member 112. As a result, as shown in FIG. 21, the protrusion 120 pressurizes the pressurized member 112 in the direction of the tensile force of the connecting member 16, and also pressurizes the pressurized member 112 inward in a direction intersecting the tensile force of the connecting member 16. Therefore, breakage of the peripheral portion of the contact surface of the pressurized member 112 with the end member 114 is less likely to occur. Note that in the first to second, and fourth to seventh embodiments, the pressurized members 12, 92, and 112 are rod-shaped bodies having a rectangular cross section, but the present invention is also applicable to a pressurized member having a square cross section.

[0038] Next, the eighth embodiment of the present invention will be described. As shown in FIGS. 22 to 24, the pressing structure 130 of the pressed member in the eighth embodiment includes a pressed member 132 and an end member 134 instead of the pressed member 112 and the end member 114 in the seventh embodiment. Since the other configurations are the same as those in the seventh embodiment, the same configurations will be denoted by the same reference numerals as in FIGS. 18 to 21, and the description thereof will be omitted. The pressed member 132 in the eighth embodiment is a rod-shaped body having a circular cross-sectional shape. Four holes 132A penetrating in the length direction are formed in the pressed member 132 at equal intervals in the circumferential direction. In the eighth embodiment, four connecting members 16 are provided, and the connecting members 16 are inserted through the holes 132A. When the material of the pressed member 132 is concrete, the holes 132A are formed by pouring concrete with the connecting members 16 arranged. When the material of the pressed member 132 is a stone material or the like, the holes 132A are formed by a drill or the like. Further, the peripheral edge portion of the end face in the length direction of the pressed member 132 is a tapered surface.

[0039] The end member 134 includes a base portion 136 and four protruding portions 138. The base portion 136 is a circular plate-shaped body. Four holes 136A corresponding to the four holes 132A of the pressed member 132 are formed in the base portion 136. The connecting members 16 are inserted through the holes 136A and fixed by fixing members 16A on the end face of the end member 134. The four protruding portions 138 are integrally provided on the outer periphery of the base portion 136 at equal intervals in the circumferential direction. The circumferential positions of the four protruding portions 138 coincide with the circumferential positions of the four holes 136A. The end member 134 is installed so as to sandwich the side surface of the pressed member 132. The inner surface of the protruding portion 138 is a tapered surface, and this tapered surface is in contact with the tapered surfaces at both ends in the length direction of the pressed member 132. The base portion 136 is disposed with a gap from the end face in the length direction of the pressed member 132. The end member 134 and the connecting members 16 constitute a pressing tool 140. In the eighth embodiment as well, the pressed member 132 is pressed by the same method of pressing the pressed member as in the seventh embodiment.

[0040] Next, the operation and effect of the pressing structure 130 of the member to be pressed will be described. In the pressing structure 130 of the member to be pressed, when a tensile force is applied to the connecting member 16, the tapered surface of the protruding portion 138 of the end member 134 presses the tapered surface of the member to be pressed 132. As a result, as shown in FIG. 24, the protruding portion 138 presses the member to be pressed 132 in the direction of the tensile force of the connecting member 16, and also presses the member to be pressed 132 inward in a direction intersecting the tensile force of the connecting member 16. Therefore, damage to the peripheral edge of the contact surface between the member to be pressed 132 and the end member 134 is less likely to occur. Further, since the four protruding portions 138 and the four connecting members 16 are installed at equal intervals in the circumferential direction, the member to be pressed 132 is reinforced against bending in all directions. Therefore, the degree of freedom in the posture of the member to be pressed 132 when the member to be pressed 132 is lifted or transported is high. In the third and eighth embodiments, the four protruding portions and the four connecting members are installed at equal intervals in the circumferential direction, but a configuration in which two protruding portions and two connecting members are installed at equal intervals in the circumferential direction may also be used. Also, a configuration in which three protruding portions and three connecting members are installed at equal intervals in the circumferential direction may be used. Further, a configuration in which five or more protruding portions and five or more connecting members are installed at equal intervals in the circumferential direction may be used. For example, a configuration in which six protruding portions and six connecting members are installed at equal intervals in the circumferential direction may be used. Also, a configuration in which eight protruding portions and eight connecting members are installed at equal intervals in the circumferential direction may be used. Further, a configuration in which a plurality of protruding portions and a plurality of connecting members are installed at non-equal intervals in the circumferential direction may be used. Also, a configuration in which a plurality of protruding portions are installed at equal or non-equal intervals in the circumferential direction and one connecting member is installed at the center may be used.

[0041] Next, the ninth embodiment of the present invention will be described. As shown in FIGS. 25 to 27, the pressurizing structure 150 of the pressurized member in the ninth embodiment includes an end member 154 instead of the end member 134 in the eighth embodiment. Since the other configurations are the same as those in the eighth embodiment, the same configurations will be denoted by the same reference numerals as in FIGS. 22 to 24, and the description thereof will be omitted. The end member 154 in the ninth embodiment has a base 156 facing the pressurized member 132 and a protruding portion 158 protruding from the base 156 along the outer periphery of the pressurized member 132. The base 156 is a circular plate-like body similar to the base 136 of the end member 134, and four holes 156A corresponding to the four holes 132A of the pressurized member 132 are formed therein. The connecting member 16 is inserted through the holes 156A and fixed by a fixing member 16A on the end face of the end member 154. The protruding portion 158 is an annular body extending along the entire circumference of the end face of the pressurized member 132. In other words, the protruding portion 158 has a shape in which the protruding portion 138 of the end member 134 is continuously formed along the entire circumference of the pressurized member 132. The inner surface of the protruding portion 158 is a tapered surface, and the tapered surfaces at both ends in the length direction of the pressurized member 132 are in contact with the tapered surface. Note that the base 156 is disposed with a gap between it and the end face in the length direction of the pressurized member 132. The end member 154 and the connecting member 16 constitute a pressurizing tool 160. In the ninth embodiment as well, the pressurized member 132 is pressurized by the same pressurizing method for the pressurized member as in the eighth embodiment.

[0042] Next, the operation and effect of the pressing structure 150 of the member to be pressed will be described. In the pressing structure 150 of the member to be pressed as well, when a tensile force is applied to the connecting member 16, the tapered surface of the protruding portion 158 of the end member 154 presses the tapered surface of the member to be pressed 132. As a result, as shown in FIG. 27, the protruding portion 158 presses the member to be pressed 132 in the direction of the tensile force of the connecting member 16, and also presses the member to be pressed 132 inward in a direction intersecting the tensile force of the connecting member 16. Therefore, breakage of the peripheral portion of the contact surface of the member to be pressed 132 with the end member 154 is less likely to occur. Further, since the four connecting members 16 are installed at equal intervals in the circumferential direction, the member to be pressed 132 is reinforced against bending in all directions. Therefore, the degree of freedom in the posture of the member to be pressed 132 when the member to be pressed 132 is lifted or transported is high. In the ninth embodiment, the four connecting members are installed at equal intervals in the circumferential direction, but a configuration in which two or three connecting members are installed at equal intervals in the circumferential direction may also be adopted. Further, a configuration in which five or more connecting members are installed at equal intervals in the circumferential direction may also be adopted. For example, a configuration in which six or eight connecting members are installed at equal intervals in the circumferential direction may also be adopted. Further, a configuration in which a plurality of connecting members are installed at unequal intervals in the circumferential direction may also be adopted. Further, a configuration in which one connecting member is installed at the center may also be adopted. Further, in the third, eighth, and ninth embodiments, the member to be pressed is a rod-shaped body having a circular cross-sectional shape, but the member to be pressed may be a rod-shaped body having an elliptical cross-sectional shape. In this case, the base portion of the end member may be an elliptical plate-shaped body corresponding to the cross-sectional shape of the member to be pressed. Here, the ellipse is not limited to a mathematical ellipse and is used in the sense including an oblong, an oval, etc. Further, as long as the base portion of the end member has a shape corresponding to the cross-sectional shape of the member to be pressed, it may be larger or smaller than the cross-sectional shape of the member to be pressed. Further, the ninth embodiment is also applicable to a member to be pressed that is a rod-shaped body having a rectangular or square cross-sectional shape. In this case, the base portion of the end member is a rectangle or a square corresponding to the cross-sectional shape of the member to be pressed, and the protruding portion is continuously formed along the entire circumference of the rectangular or square end face of the member to be pressed. Further, in any case where the cross-sectional shape of the member to be pressed is elliptical, rectangular, or square, the protruding portion may be intermittently formed along the outer periphery of the end face of the member to be pressed as in the eighth embodiment.

[0043] In the first to third, and fifth to ninth embodiments, the pressurized members 12, 52, 112, and 132 are rod-shaped bodies. However, the present invention is applicable to pressurized members other than rod-shaped bodies such as rectangular parallelepipeds, cubes, and cylindrical bodies. Further, in the first to ninth embodiments, the end faces of the end members are flat, but a locking portion or the like for lifting the pressurized member may be formed on the end face of the end member.

Industrial Applicability

[0044] The present invention can be used for reinforcing and bonding members.

Explanation of Signs

[0045] 10, 30, 50, 70, 90, 100 Pressurizing structures of pressurized members 12, 52, 92, 112, 132 Pressurized members 14, 32, 54, 72, 114, 134, 154 End members 16, 74 Connecting members 16A, 74A Fixing members 18, 34, 56, 76, 116, 136, 156 Bases 20, 36, 38, 58, 78, 120, 138, 158 Protrusions 20A, 36A, 38A, 58A, 78A, 112A Holes 22, 40, 60, 80, 122, 140 Pressurizing tools 110, 130, 150 Pressurizing structures of pressurized members 102 Spacer S102 Mounting process S104 Tension applying process

Claims

1. A pressurized member, A pair of end members installed in contact with both sides of the pressurized member and in contact with the pressurized member, A connecting member for connecting the pair of end members, and comprising, The end member has a base portion facing the pressurized member and a plurality of protruding portions protruding from the base portion so as to sandwich the pressurized member, A pressurizing structure for a pressurized member configured such that when a tension force is applied to the connecting member, the end member pressurizes the pressurized member in the direction of the tension force and the protruding portion also pressurizes the pressurized member inward in a direction intersecting the direction of the tension force.

2. In claim 1, The connecting member is installed outside the pressurized member and connected to the protruding portion of the end member, and the pressurizing structure of the pressurized member.

3. In claim 2, The pressurized member is a member having a quadrangular cross-sectional shape, The end member is a member having a U-shaped cross-sectional shape, and the pressurizing structure of the pressurized member.

4. In claim 2, The pressurized member is a member having a circular or elliptical cross-sectional shape, The base portion of the end member is a circular or elliptical plate-like body corresponding to the cross-sectional shape of the pressurized member, and a plurality of the protruding portions are intermittently provided along the outer peripheral portion of the base portion, and the pressurizing structure of the pressurized member.

5. In claim 2, The pressurizing structure of the pressurized member further includes a spacer installed between the protruding portion of the end member and the pressurized member.

6. In claim 1, The connecting member is installed inside the pressurized member and connected to the end member, Tapered surfaces are formed on the protruding portion of the end member and the pressurized member, and the end member and the pressurized member are in contact with each other on these tapered surfaces, so that the protruding portion pressurizes the pressurized member in the direction of the tension force and also pressurizes the pressurized member inward in a direction intersecting the direction of the tension force, and the pressurizing structure of the pressurized member is configured.

7. A pressurized member, A pair of end members installed in contact with both sides of the pressurized member and in contact with the pressurized member, A connecting member for connecting the pair of end members, and comprising, The end member has a base portion facing the pressurized member and a protruding portion protruding from the base portion along the outer periphery of the pressurized member, Tapered surfaces are formed on the protruding portion of the end member and the pressurized member, and the end member and the pressurized member are in contact with each other on these tapered surfaces, A pressing structure of a pressed member configured such that when a tensile force is applied to the connecting member, the protruding portion presses the pressed member in the direction of the tensile force and also presses the pressed member inward in a direction intersecting the direction of the tensile force.

8. A pressing tool having the end member and the connecting member according to any one of Claims 1 to 7.

9. A mounting step of installing a pair of end members in contact with both sides of the pressed member and connecting the pair of end members with a connecting member, A tensile force applying step of applying a tensile force to the connecting member, and including, The end member has a base portion facing the pressed member and a plurality of protruding portions protruding from the base portion so as to sandwich the pressed member. A method for pressing a pressed member, wherein when a tensile force is applied to the connecting member in the tensile force applying step, the end member presses the pressed member in the direction of the tensile force and the protruding portion also presses the pressed member inward in a direction intersecting the direction of the tensile force.

10. A mounting step of installing a pair of end members in contact with both sides of the pressed member and connecting the pair of end members with a connecting member, A tensile force applying step of applying a tensile force to the connecting member, and including, The end member has a base portion facing the pressed member and a protruding portion protruding from the base portion along the outer periphery of the pressed member. A tapered surface is formed on the protruding portion of the end member and the pressed member, and the end member and the pressed member are in contact with each other on these tapered surfaces. A method for pressing a pressed member, wherein when a tensile force is applied to the connecting member in the tensile force applying step, the protruding portion presses the pressed member in the direction of the tensile force and also presses the pressed member inward in a direction intersecting the direction of the tensile force.

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