JP6890987B2 - Filler injection method and screw rebar joint structure for screw rebar joints - Google Patents

Description

The present invention relates to a method of injecting a filler into a screw reinforcing bar joint to a connecting portion connecting a screw reinforcing bar in an upper floor portion and a screw reinforcing bar in a lower floor portion in a building having an RC structure, and a screw reinforcing bar joint structure.

In a building with an RC structure, a reinforcing bar that bears a tensile load is used among the loads applied to the structure. Concavo-convex ribs are formed on the surface of such a reinforcing bar in order to enhance the adhesiveness of concrete or grout material and counteract the pulling force. Reinforcing bars are connected by welding, and each end of the male screw is screwed into a tubular connecting member provided with a female screw to connect, or the ends of the reinforcing bars to be connected are connected to each other. It is connected by a method such as crimping the coupler after inserting it into the coupler.

In particular, among these connection methods, those using a screw structure have little variation in construction quality, and it is easy to obtain a joint with stable strength. As a conventional technique relating to such a screw structure, for example, there is one shown in Patent Document 1.

Patent Document 1 uses a reinforcing bar having a screw structure, for example, in a reverse striking method. The reverse construction method is a method in which the first floor is first constructed on the ground and the lower floors are constructed in sequence. When the first floor portion above the ground is constructed, a space for constructing the first basement floor portion is formed below the first floor portion while supporting the first floor portion. When constructing the first basement floor portion in this space, the screw reinforcing bars provided on the first floor portion and the screw reinforcing bars provided on the first basement floor portion are connected.

Prior to the connection, reinforcing bars are attached to each of the RC members on the upper and lower floors. The screw structure of the reinforcing bar is also used for this attachment, and the reinforcing bar is screwed into the buried member having the female screw portion pre-embedded in each RC member.

This Patent Document 1 is a technique for connecting reinforcing bars connected to the upper and lower floors in a space between the upper and lower floors, and does not particularly mention a method of connecting the reinforcing bars to the upper floors. However, when the screw reinforcing bar is screwed into the buried member at the ceiling position, a filler such as a grout material is usually injected prior to the screwing of the screw reinforcing bar. This grout material is filled between the male threaded portion of the threaded reinforcing bar and the female threaded portion of the embedded member and hardened to prevent the male threaded member from coming off and increase the rigidity of the joint.

For injecting such a grout material into an embedded member, for example, an injection device that discharges while mixing a main agent and a curing agent contained in a separate container is used. This injection device is usually held by an operator by hand, and the discharge trigger is operated while holding the injection device in an upward posture toward a hole of a buried member opened in the ceiling. A predetermined amount of grout material is discharged for each trigger operation, and the operator adjusts the number of times the grout material is discharged according to the thickness of the screw reinforcing bar to be used.

Japanese Unexamined Patent Publication No. 10-317393

However, in the above-mentioned conventional method, some of the grout material injected upward falls without waiting for the screw reinforcing bar to be screwed. The viscosity of grout material is almost constant, although it varies slightly depending on the temperature. Therefore, it is impossible to completely prevent the fall, and the filling amount of the grout material is not appropriate. Therefore, the strength and rigidity of the joints of the threaded reinforcing bars vary.

In addition, the injection device has a predetermined weight, and the trigger of the injection device is heavy due to the viscosity of the grout material, and pulling the trigger many times while holding the injection device upward imposes a heavy burden on the operator. Not only that, the fallen grout material stains the work site and the clothes of the workers, and the work environment becomes poor. The fall of the grout material naturally deteriorates the yield of the grout material.

In view of such circumstances, conventionally, a method of injecting a filler into a screw reinforcing bar joint portion of a screw reinforcing bar and a screw reinforcing bar joint structure capable of exhibiting reliable strength by a simple operation have been required.

(Characteristic composition)
The method for injecting a filler into a screw reinforcing bar joint according to the present invention is as follows.
When screwing and joining a screw reinforcing bar that constitutes a column on the lower floor and has a male screw portion to a receiving member that is pre-embedded in the upper floor skeleton in the reverse striking method and has an inner surface consisting of a female screw portion and a bottom surface.
A cartridge having a container body in which a filler to be filled is held in a gap between the female screw portion and the male screw portion and a discharge port for discharging the filler is provided, the discharge port is opposite to that of the screw reinforcing bar. In the state of, it is arranged between the end of the screw reinforcing bar and the inner surface of the receiving member.
Along with the screwing of the screw reinforcing bar with respect to the receiving member, the cartridge is pressed by the end surface of the screw reinforcing bar and the inner surface of the receiving member to push the filler at the innermost part of the female screw portion. Emit from
It is characterized in that the filler is press-fitted into the gap between the male screw portion and the female screw portion by further screwing the screw reinforcing bar.

(effect)
As in this method, a cartridge holding the filler is placed at the end of the threaded rebar, and the threaded rebar is screwed into the receiving member to form a gap between the female threaded part of the receiving member and the male threaded part of the threaded rebar. The filling work of the filler becomes extremely efficient.

For example, in the case of connecting the reinforcing bar to the ceiling portion of the work space such as the reverse striking method, the filler can be injected only by screwing the reinforcing bar into the receiving member of the ceiling. In this case, it is not necessary to hold the filling device in the upward posture as in the conventional case, and the filling operation becomes extremely easy. Moreover, for example, a predetermined amount of the filler according to the size of the reinforcing bar can be held in the cartridge in advance. That is, since the filling work of the filler in the cartridge can be performed at a place different from the connection site of the screw reinforcing bar, it is possible to shorten the connecting work time of the screw reinforcing bar in a place where the working environment such as temperature and humidity is severe.

In particular, the cartridge in this method is arranged at the end of the screw reinforcing bar in a state where the discharge port of the filler provided in the container body of the cartridge is at a position opposite to that of the screw reinforcing bar. That is, by screwing the screw reinforcing bar, the filler can be received and discharged at the innermost part of the member, and the filler is prevented from being discharged unevenly to one of the peripheral edges of the screw reinforcing bar. As a result, when the screwing of the screw reinforcing bar is completed, the filler is surely filled between the male screw portion and the female screw portion.

The cartridge may be at least one that can hold the filler when screwing the screw reinforcing bar to the member. The cartridge may, for example, have a structure that completely encloses the filler, or may temporarily hold the filler while a part of the cartridge is open. Further, the cartridge and a part of the screw reinforcing bar may cooperate to hold the filler.

This method is applicable not only to the reverse striking method but also to a case where the receiving member is a tubular member in which two screw reinforcing bars are butted against each other and connected. For example, a receiving member is shallowly screwed into one reinforcing bar, the other screw reinforcing bar is screwed while inserting the cartridge into the receiving member, and the receiving member and the other screw reinforcing bar are screwed to both screws. Both screw reinforcing bars can be abutted and arranged at the center position of the receiving member while narrowing the distance between the reinforcing bars. In this case, the work process of filling the filler does not occur in particular, and the filler can be appropriately injected only by paying attention to the connection position of the two screw reinforcing bars with respect to the receiving member.

(Characteristic composition)
In the method for injecting a filler according to the present invention, the cartridge can be fixed to the end of the screw reinforcing bar with an adhesive or an adhesive when the screw reinforcing bar is screwed.

(effect)
With this method, the cartridge can be attached to the reinforcing bar extremely easily. In this case, a part of the outer surface of the cartridge may be adhered to the end surface of the screw reinforcing bar, or a part of the cartridge may be adhered to the side surface near the tip of the screw reinforcing bar. By fixing the cartridge, the cartridge does not move even if the posture of the reinforcing bar changes to some extent when the screw reinforcing bar is screwed to the member, and the screwing work of the screw reinforcing bar becomes easy.

Further, by fixing the position of the cartridge, the cartridge does not inadvertently come into contact with the inner surface of the receiving member when the screw reinforcing bar is screwed into the receiving member. Therefore, the filler held in the cartridge is released when the screw reinforcing bar reaches the planned position with respect to the receiving member, and the filler can be injected in an ideal state.

(Characteristic composition)
In the method for injecting a filler according to the present invention, the cartridge is made of a material that can be flexed and deformed, and a temporary fixing member having an outer diameter larger than the inner diameter of the female screw portion is used as an adhesive or an adhesive material. The cartridge may be fixed to the female screw portion when the screw reinforcing bar is screwed.

(effect)
When the cartridge is placed at the end of the screw rebar and screwed to the member by receiving the screw rebar, the weight of the screw rebar increases the burden of the screwing work. For this reason, it becomes difficult to align the tip of the screw reinforcing bar with respect to the hole of the receiving member, and there is a possibility that the cartridge may interfere with the periphery of the hole of the receiving member. In that respect, if only the cartridge is first fixed to the inside of the receiving member by a temporary fixing member as in this method, the cartridge is lightweight, so that the burden of the work is reduced and the hole of the receiving member is covered. The cartridge is securely installed.

In particular, the temporary fixing member is made of a material that can be flexed and deformed, and has an outer diameter dimension larger than the inner diameter of the female screw portion. Therefore, when the cartridge is pushed into the female screw portion from below using various rod-shaped members or the like, the end portion of the temporary fixing member rubs against the inner surface of the female screw portion and is bent and deformed to exhibit the return prevention function.

As described above, according to this method, the cartridge can be easily attached to the receiving member, and the filler can be reliably injected between the male threaded portion of the screw reinforcing bar and the female threaded portion of the receiving member.

(Characteristic composition)
The screw reinforcing bar joint structure according to the present invention is
A receiving member that is pre-embedded in the upper floor skeleton in the reverse striking method and has an inner surface consisting of a female screw portion and a bottom surface.
A threaded reinforcing bar having a male threaded portion that constitutes a column on the lower floor and is screwed into the female threaded portion.
With a cartridge that holds a predetermined amount of filler,
The cartridge
A container body in which the discharge port of the filler is provided at a position opposite to the screw reinforcing bar, and
Temporarily fixed to the container body on the side opposite to the discharge port by using an adhesive or an adhesive material, which is made of a material that can be flexed and deformed and has an outer diameter larger than the inner diameter of the female screw portion. With parts,
The cartridge is fixed to the female screw portion by bending deformation of the temporary fixing member while arranging the container body on the back side when the screw reinforcing bar is screwed, and the end surface of the screw reinforcing bar and the inner surface of the receiving member. It is characterized in that the filler is discharged from the discharge port and filled between the female screw portion and the male screw portion by pressing the container body.

(effect)
In the screw reinforcing bar joint structure of this configuration, a temporary fixing member having an outer diameter larger than the inner diameter of the female screw portion, which is made of a material that can be flexed and deformed by pushing the cartridge into the female screw portion, is the female screw portion. It rubs against the inner surface of the screw and exerts a return prevention function, so that the cartridge can be easily attached to the receiving member.

In addition, since the discharge port provided in the container body is arranged at a position opposite to the screw reinforcing bar so as to discharge the filler, the filler is received and discharged at the innermost part of the member by the screwing of the screw reinforcing bar. Can be done. This prevents the filler from being unevenly filled in one of the peripheral edges of the threaded reinforcing bar, and when the threading of the threaded reinforcing bar is completed, the filler is surely placed between the male threaded portion and the female threaded portion. Will be filled in.

(Characteristic composition)
It is convenient that the screw reinforcing bar joining structure according to the present invention is provided with a gap around which the filler flows.

(effect)
By providing a gap in the temporary fixing member as in this configuration, the filler released at the innermost part of the receiving member can easily flow between the male threaded portion and the female threaded portion. Therefore, the connection work between the receiving member and the screw reinforcing bar is ensured.

(Characteristic composition)
In the screw reinforcing bar joining structure according to the present invention, it is convenient that the temporary fixing member has a cross shape.

(effect)
If the temporary fixing member has a cross shape as in this configuration, the filler released at the innermost part of the receiving member is more likely to flow between the male threaded portion and the female threaded portion. Therefore, the connection work between the receiving member and the screw reinforcing bar becomes more reliable.

Explanatory drawing which shows connection mode of screw reinforcing bar which concerns on 1st Embodiment A perspective view showing an example of a method of fixing the cartridge of the first embodiment to the screw reinforcing bar. Perspective view showing an example of the holding member of the cartridge which concerns on 2nd Embodiment A perspective view showing a fixing mode of the cartridge using the holding member of the second embodiment. A perspective view showing an example of a cartridge in which the discharge direction of the third embodiment is specified. A perspective view showing an example of a cartridge in which the discharge direction of the fourth embodiment is specified. Perspective view showing an example in which the cartridge and the support portion of the fifth embodiment are integrally molded. A perspective view showing an example of a cartridge capable of holding the two-component filler of the sixth embodiment. Explanatory drawing which shows an example of the cartridge which concerns on 7th Embodiment Explanatory drawing which shows an example of the cartridge which concerns on 8th Embodiment Explanatory drawing which shows an example of the cartridge which concerns on 9th Embodiment Explanatory drawing which shows an example of the cartridge which has the temporary fixing member which concerns on 10th Embodiment Explanatory drawing which shows an example of the cartridge which has the temporary fixing member which concerns on 10th Embodiment Graph showing the tensile test result of the threaded reinforcing bar joint by this method

〔Overview〕
An embodiment of a method of injecting a filler into a screw reinforcing bar joint of a screw reinforcing bar according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, in the filler injection method according to the present embodiment, when the threaded reinforcing bar 2 having the male threaded portion 2a is screwed and joined to the receiving member 1 having the female threaded portion 1a. The filler 3 is filled in the gap between the female screw portion 1a and the male screw portion 2a. The filler 3 is held in the cartridge 4 in advance, and the screw reinforcing bar 2 is screwed into the receiving member 1 in a state of being arranged at the end of the screw reinforcing bar 2. As the screw reinforcing bar 2 is screwed with respect to the receiving member 1, the cartridge 4 is pressed by the end surface 2b of the screw reinforcing bar 2 and the inner surface of the receiving member 1 (the bottom surface 1b and the surface of the female screw portion 1a), and the filler 3 is released. .. Further, by screwing the screw reinforcing bar 2, the filler 3 is press-fitted into the gap between the male screw portion 2a and the female screw portion 1a.

[First Embodiment]
1 (a) to 1 (e) show a case where, for example, in the reverse striking method, the screw reinforcing bars 2 constituting the columns on the lower floor are screwed into the receiving member 1 pre-embedded in the skeleton 5 on the upper floor. When the screw reinforcing bar 2 is fixed to the receiving member 1 of the skeleton 5 in this way, the screw reinforcing bar 2 can be suspended and fixed to the receiving member 1 by screwing, so that the holding work of the screw reinforcing bar 2 becomes easy and the workability is very high. good.

In order to prevent the screw reinforcing bar 2 from coming out of the receiving member 1, it is necessary to inject a filler 3 such as a grout material between the male screw portion 2a and the female screw portion 1a. Conventionally, in the reverse striking method, the filler 3 is injected into the inner part of the receiving member 1 by using an injection gun or the like before inserting the reinforcing bar, but a part of the filler 3 is before inserting the screw reinforcing bar 2. It hangs down to the outside of the receiving member 1. Further, the filler 3 is injected using a manual injection gun or the like, but when the temperature is low, the viscosity of the filler 3 tends to increase, and the injection load becomes large. As described above, in the conventional injection method, not only the yield of the filler 3 is poor, but also the working environment is extremely poor.

In order to solve such inconvenience, in the present embodiment, the filler 3 is held in the cartridge 4 in advance, and while the cartridge 4 is arranged at the tip of the screw reinforcing bar 2, the screw reinforcing bar 2 is screwed to the member 1. It shall be matched. The filler 3 is pre-filled with a predetermined amount in the cartridge 4 according to the size of the screw reinforcing bar 2, for example. The filling work of the filler 3 into the cartridge 4 can be performed at a place different from the connection site of the screw reinforcing bar 2. Further, the filler 3 held in the cartridge 4 is released after the screw reinforcing bar 2 reaches the vicinity of the bottom surface 1b of the receiving member 1. Therefore, it is not necessary to rush to screw the screw reinforcing bar 2 before the filler 3 hangs down as in the conventional case, and the screwing operation of the screw reinforcing bar 2 can be performed calmly and surely. As described above, the method of connecting the screw reinforcing bars 2 in this method reduces the load of the connecting work in a place where the working environment such as temperature and humidity is severe.

[Screw rebar]
As the screw reinforcing bar 2 to be used, for example, those having names D19 to D51 specified in JIS G 3112 can be used.

[Receiving member]
As shown in FIG. 1, the receiving member 1 has a tubular main body portion 1c and a partition portion 1d at a central position in the longitudinal direction. As a general rule, the screw reinforcing bar 2 is screwed until it comes into contact with the partition portion 1d. In the receiving member 1, a hole portion 1e for filling the filler 3 is formed in the inner portion of one female screw portion 1a. For example, when the receiving member 1 is embedded in the skeleton 5 of the reverse striking method, the receiving member 1 is installed with the female screw portion 1a having the hole portion 1e facing up. Specifically, a screw reinforcing bar 2 to be embedded in a pillar on the upper floor is constructed, and the receiving member 1 is screwed into the lower end portion of the screw reinforcing bar 2. When the screwing is completed, the filler 3 is injected from the hole 1e using an injection gun, and the filler 3 overflows upward from the gap between the male screw portion 2a of the screw reinforcing bar 2 and the female screw portion 1a of the receiving member 1. Inject up to. After that, a concrete template is assembled to form the skeleton 5, and concrete is cast so that only the lower end surface of the receiving member 1 is exposed downward.

Since the filler 3 is injected into the female screw portion 1a below the partition portion 1d of the receiving member 1 by the method of the present embodiment, the hole portion 1e for injecting the filler 3 is not provided. ..

〔cartridge〕
As shown in FIG. 2, in the present embodiment, the cartridge 4 pre-filled with the filler 3 is arranged on the end surface 2b of the screw reinforcing bar 2 screwed into the receiving member 1. The container body 4a of the cartridge 4 is pressed by the end surface 2b of the screw reinforcing bar 2 and the inner surface of the receiving member 1 (the bottom surface 1b and the surface of the female screw portion 1a) when the screw reinforcing bar 2 is screwed into the receiving member 1. To. As a result, the shape of the container body 4a is forced to follow the shape of the gradually narrowing space, and the outer skin is stretched by the reaction force of the filler 3 from the inner surface. After that, any part of the container body 4a is stretched beyond the maximum tensile strength, and the container body 4a is opened.

As the material constituting the container body 4a, various materials can be applied as long as they can be pressed and opened in this way. The structure can also be set as appropriate. For example, the material of the container body 4a may be one that expands and contracts like a rubber balloon, or may be composed of a thin resin bag even if it does not have elasticity. Further, aluminum foil or coated paper may be used. Any material may be used as long as it can hold the filler 3 in a fluid state and can be opened when a predetermined pressure is applied. In particular, in the case of elastic rubber or the like, the amount of the filler 3 can be changed according to the size of the screw reinforcing bar 2 while using one container body 4a of the same size, which enhances convenience.

Examples of the filler 3 used for fixing the screw reinforcing bar 2 include an inorganic grout material and an organic grout material. Among these, some organic grout materials are used by mixing a main agent and a curing accelerator. However, the main agent cures in a predetermined time without using a curing accelerator. Therefore, the curing accelerator can be used for adjusting the curing time. The usage mode of such a two-component grout material will be described later.

The cartridge 4 into which the filler 3 is injected can be prepared at another place prior to the connection work of the screw reinforcing bar 2. Therefore, the cartridge 4 can be prepared without being restricted by the connection work process of the screw reinforcing bar 2, the degree of freedom in using the cartridge 4 is improved, and the connection work at the connection site becomes smooth.

FIG. 2 shows a case where the cartridge 4 is a rubber balloon. Since the rubber balloon has elasticity, the injection amount of the filler 3 can be changed according to the screw reinforcing bars 2 of a plurality of sizes. For the injection of the filler 3, for example, a manual or electric filler injection machine is used. The injection amount of the filler 3 is measured by the number of operations of the injection trigger if it is a manual type, or by the operating time of the injection drive unit if it is an electric type. After injecting the filler 3, the mouth portion 4b of the rubber balloon is tied or sealed with an adhesive tape or the like.

[How to fix the cartridge]
When screwing the screw reinforcing bar 2 into the receiving member 1, the method of inserting the cartridge 4 into the receiving member 1 is arbitrary. For example, the cartridge 4 may be held by hand and inserted into the receiving member 1 immediately before the end portion of the screw reinforcing bar 2 is screwed into the receiving member 1. However, it is extremely complicated to directly insert the cartridge 4 into the receiving member 1 provided on the upper floor skeleton 5 of the reverse striking method. Therefore, it is preferable that the cartridge 4 is fixed to the end surface 2b of the screw reinforcing bar 2. For example, it can be fixed using an adhesive or an adhesive material. These adhesives and adhesives may be provided on the screw reinforcing bar 2 or may be provided on the cartridge 4. Alternatively, when the cartridge 4 is placed, it may be attached or applied to the screw reinforcing bar 2 or the cartridge 4.

[Adhesives and adhesives]
The type of adhesive or adhesive material is arbitrary as long as the cartridge 4 can be fixed when the screw reinforcing bar 2 is screwed into the member 1. Although it depends on the material of the cartridge 4, for example, a general double-sided tape 6a can be used as the adhesive material 6. As the adhesive, a rubber-based adhesive having strong adhesive properties, an instant adhesive, or the like can be used. With these, the cartridge 4 can be attached to the screw reinforcing bar 2 very easily.

[How to fix screw rebar]
When screwing the screw reinforcing bar 2, it is necessary that the screw reinforcing bar 2 is screwed to the receiving member 1 by a predetermined length or more. That is, a predetermined number of threads are engaged between the screw reinforcing bar 2 and the receiving member 1 so that the joint portion of the screw reinforcing bar 2 can exhibit a predetermined strength and rigidity.

The screwing operation of the screw reinforcing bar 2 is performed by a person holding the reinforcing bar having a small diameter, but in the case of a large diameter, holding it with a predetermined jig or the like. After screwing to the back of the female screw portion 1a, a predetermined torque is applied. As a result, the play between the receiving member 1 and the screw reinforcing bar 2 is eliminated, and a strong connecting portion can be obtained. A portable torque wrench or the like is used for this tightening work.

In addition, in order to confirm whether or not the connection state of the screw reinforcing bar 2 is appropriate, it is preferable to provide an index 2d on the side surface 2c of the screw reinforcing bar 2. For example, as shown in FIG. 1, an index 2d having a predetermined length is provided on a flat side surface 2c that is not a threaded portion of the side surface 2c of the screw reinforcing bar 2. If the flat side surface 2c is used, the index 2d can be easily installed. This index 2d may be attached with a separate body such as a sticker, or may be drawn with paint or the like. By providing the index 2d, the screwing depth of the screw reinforcing bar 2 can be confirmed, and the desired tensile strength can be given to the joint portion of the screw reinforcing bar 2.

Such an index 2d is particularly effective when, for example, the screw reinforcing bars 2 are screwed from both ends to a simply tubular receiving member 1 having no partition portion 1d in the central portion. In this case, it is necessary that the butted portion of the two screw reinforcing bars 2 is located at a substantially central position of the receiving member 1. That is, it is confirmed that each screw reinforcing bar 2 is screwed to the receiving member 1 to a predetermined length or more, and each screw reinforcing bar 2 is screwed evenly to the receiving member 1. As shown in FIG. 1 (e), for example, the index 2d is provided so that a part of the screw reinforcing bar 2 is exposed to the outside of the receiving member 1 when the screwing of the screw reinforcing bar 2 is completed. By providing the index 2d, these elements can be easily confirmed.

〔Example〕
An evaluation test was conducted as follows for the connection joint of the screw reinforcing bar 2 by the connection method of the present embodiment. For the test, a screw reinforcing bar 2 made of JFE steel with a steel type SD490 and a name of D38 and a same diameter joint manufactured by using a screw coupler also made of JFE steel were used. As the filler 3, screw grout type M2 (inorganic grout made of JFE steel) was used.

The evaluation test is based on the description of the mechanical joint performance criteria (pages 170 to 177) for reinforcing bars in the "Explanation of Structural Technical Standards for Buildings (2015 Edition), Supervised by the National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism". , Elastic region positive and negative repetition test and plastic region positive and negative repetition test were performed. An example of the test result is shown in FIG.

FIG. 14 shows the relationship between elongation and stress in a tensile test. In the actual test, the tension in the elastic region where a stress of 0.95 times the yield load σy was applied was repeated 20 times, and then the tension in the plastic region was repeated 4 times. FIG. 14 shows the tensile history of each of the elastic region and the plastic region twice. As a result of the test, the sliding deformation of the joint was 0.17 mm (within the judgment standard value of 0.3), the strength was 720 N / mm ² (the judgment standard value was 620 or more), and the performance of the class A joint (“strength and” It was confirmed that the joints, which are similar in rigidity to the base material but slightly inferior to the base material in other respects, are satisfied.

[Second Embodiment]
[Cartridge holding member]
For fixing the cartridge 4 to the screw reinforcing bar 2, a dedicated holding member A as shown in FIGS. 3 and 4 can also be used. For example, it can be a clip having a holding portion for holding the cartridge 4 and a supporting portion for fixing itself to the end portion of the screw reinforcing bar 2.

As shown in FIG. 3, for example, the holding member A is composed of a first member 7 and a second member 8 that are combined with each other. Each member is L-shaped having bent portions 7a and 8a, and a portion located near the end face of the screw reinforcing bar 2 with the bent portions 7a and 8a as a boundary serves as a holding portion and is located near the side surface 2c of the screw reinforcing bar 2. The part becomes the support part. Of these, the first sandwiching portion 7b of the first member 7 is formed in a plate shape and has a notch portion 7d at the end. On the other hand, in the second sandwiching portion 8b of the second member 8, both ends of the plate-shaped base portion 8d are bent in the direction opposite to the end face side of the screw reinforcing bar 2 so that the first sandwiching portion 7b can be inserted. It has. As a result, the vertical cross-sectional shape of the second holding portion 8b along the longitudinal direction becomes substantially C-shaped. A gap 8f is formed between the two folded portions 8e, and serves as a portion for locking a part of the cartridge 4. Further, the base portion 8d is also formed with a groove portion 8g for locking a part of the cartridge 4 so as to open to the side of the first holding portion 7b. The folding direction of the folded portion 8e may be on the side of the end surface 2b of the screw reinforcing bar 2 contrary to the example of FIG.

FIGS. 4 (a) and 4 (b) show a fixed example when, for example, a rubber balloon is used as the cartridge 4. After injecting the filler 3 into the container body 4a, the mouth portion 4b is tied and sealed, and the first sandwiching portion 7b is sandwiched while the mouth portion 4b is applied to the notch portion 7d of the first sandwiching portion 7b. It is inserted into the groove portion 8g of the portion 8b. The first sandwiching portion 7b is inserted into the second sandwiching portion 8b until the bent portion 7a of the first sandwiching portion 7b and the bent portion 8a of the second sandwiching portion 8b come into contact with the side surface 2c of the screw reinforcing bar 2. In the state where the insertion is completed, the tip of the first support portion 7c of the first member 7 and the tip of the second support portion 8c of the second member 8 press the side surface 2c of the screw reinforcing bar 2 by their own elasticity. As a result, a rotational moment acts on the first member 7 and the second member 8 so that the tips of the first support portion 7c and the second support portion 8c are separated from each other. Due to this rotational moment, the first sandwiching portion 7b and the second sandwiching portion 8b are stiffened, and both sandwiching portions 7b and 8b hold the cartridge 4 without coming out of each other, and while pressing the side surface 2c of the screw reinforcing bar 2, the screw reinforcing bar is pressed. It is fixed at 2.

Even when the first holding portion 7b and the second holding portion 8b are inserted all the way into each other, the inner portion 7f of the notch portion 7d is configured so as not to reach the inner portion 8h of the groove portion 8g. That is, the first support portion 7c and the second support portion 8c need to be completely in contact with the side surface 2c of the screw reinforcing bar 2 over the entire length and inserted into the receiving member 1. Therefore, a gap is provided between the cutout portion 7d and the groove portion 8g so that the mouth portion 4b of the cartridge 4 can be sandwiched even in a state of complete contact.

As shown in FIG. 3, the tip of the first holding portion 7b has a tapered planar shape. This facilitates insertion into the second holding portion 8b. Further, the first holding portion 7b is provided with a corner portion 7e that elastically contacts the second holding portion 8b. That is, at the position where the tapered region ends, both sides of the first sandwiching portion 7b are formed as corner portions 7e, and the length of the cutout portion 7d is formed deeper than the position of the corner portion 7e. Further, the tips of the fork-shaped first sandwiching portions 7b are widened in the width direction of the first sandwiching portion 7b so as to be wider than the inner width of the folded portions 8e of the second sandwiching portion 8b. As a result, the tip end portion of the first sandwiching portion 7b inserted into the second sandwiching portion 8b is narrowed by the folded-back portion 8e. As a result, in addition to the squeezing between the first holding portion 7b and the second holding portion 8b due to the repulsive force between the first supporting portion 7c and the second supporting portion 8c, the positions of both holding portions 7b and 8b are securely fixed. To.
The first sandwiching portion 7b may be sandwiched in the thickness direction of the first sandwiching portion 7b by the base portion 8d of the second sandwiching portion 8b and the two folded portions 8e.

In addition, when fixing the holding member A holding the cartridge 4 to the screw reinforcing bar 2, at least one of the first holding portion 7b and the second holding portion 8b may be adhered to the end surface 2b of the screw reinforcing bar 2. Good. For example, by fixing with double-sided tape, instant adhesive, or the like, the holding member A can be more reliably fixed to the screw reinforcing bar 2.

The shapes of the first support portion 7c and the second support portion 8c are preferably configured to be as thin and narrow as possible within a range in which a predetermined elastic force can be exerted. This portion is inserted into a space formed by the flat side surface 2c of the screw reinforcing bar 2 and the inner surface of the female screw portion 1a of the receiving member 1. Therefore, it is better to occupy as little volume as possible.

If the first member 7 and the second member 8 have common dimensions for the screw reinforcing bars 2 having several dimensions, the manufacturing and management of these members become rational, and the mounting workability of the cartridge 4 becomes improved. In addition to improving, costs are reduced. However, when the first member 7 and the second member 8 having specific dimensions are used for the screw reinforcing bars 2 having various dimensions, the depth at which the tip of the first sandwiching portion 7b is inserted into the inside of the second sandwiching portion 8b is different. Therefore, for example, the depth of the notch portion 7d provided in the first sandwiching portion 7b and the depth of the groove portion 8g provided in the second sandwiching portion 8b are formed sufficiently deep, and both sandwiching portions 7b and 8b are inserted deepest. Even if this is the case, it is preferable to form a gap that can hold a part of the container body 4a.

The first member 7 and the second member 8 are made of, for example, various metal materials and resin materials that can be elastically deformed. In the case of a resin material, the shapes of the first sandwiching portion 7b and the second sandwiching portion 8b can be arbitrarily set by injection molding or the like. In the case of a resin material, the tip of the first holding portion 7b is cut each time according to the size of the screw reinforcing bar 2 in order to apply the first member 7 and the second member 8 having one dimension to a plurality of screw reinforcing bars 2. It may be a thing. Although not shown, for example, a mark for cutting is provided at a position corresponding to the dimension of the screw reinforcing bar 2, and when the cartridge 4 is mounted, the first holding portion 7b is set to the optimum length with scissors or the like. Disconnect. As a result, the cartridge 4 can be positioned at the center of the end surface 2b of the screw reinforcing bar 2 even when the first sandwiching portion 7b and the second sandwiching portion 8b are inserted all the way.

[Third Embodiment]
When the cartridge 4 is pressed by the screw reinforcing bar 2 and the receiving member 1, it is preferable that the filler 3 filled in the cartridge 4 is discharged in the desired direction. That is, if it is discharged unevenly to one of the peripheral edges of the screw reinforcing bar 2, the gap between the screw reinforcing bar 2 and the receiving member 1 in that direction is appropriately filled with the filler 3, while the peripheral edge on the opposite side is appropriately filled. In some parts, there may be a region where the filler 3 is not filled.

In order to prevent this, the opening strength of the portion of the outer skin of the container body 4a can be set low so that the opening is performed from the top of the outer skin opposite to the end surface 2b of the screw reinforcing bar 2. For example, as shown in FIG. 5, when a container body 4a such as a rubber balloon is used, an arbitrary reinforcing tape 9 is attached to a region other than the top of the surface of the container body 4a with the filler 3 filled. .. With this configuration, the filler 3 can be reliably discharged to the innermost part of the member 1.

[Fourth Embodiment]
Further, as shown in FIG. 6, the membrane member forming the container body 4a may be provided with a notch 10 which is an injection port and a discharge port of the filler 3 in the vicinity of the top portion. The notch 10 is formed in a cross shape, for example, and the filler 3 is injected from the notch 10 and then closed with a sealing member 11 such as a tape. The sealing member 11 is made to be easier to tear than the material of the container body 4a. This facilitates the injection work of the filler 3 and enables uniform discharge in all directions.

In addition to this, without providing the notch 10, the thickness of the top of the container body 4a itself is formed to be thin so that the container body 4a can be easily opened so that the filler 3 is preferentially discharged from the top. Is also good.

With these configurations, the filler 3 can be discharged from the top when the container body 4a is pressed, and the filler 3 is evenly injected in all directions into the gap between the screw reinforcing bar 2 and the receiving member 1. can do.

[Fifth Embodiment]
When the holding member A is made of resin, the holding member A can be integrally formed as a support portion on the side of the container body 4a constituting the cartridge 4. For example, as shown in FIG. 7, a first support portion 7c and a second support portion 8c that exhibit the same functions as the holding member A are integrally formed on the container body 4a. In that case, if the distance between the first support portion 7c and the second support portion 8c is formed in advance to a predetermined dimension according to the dimension of the screw reinforcing bar 2 to be applied, the pressing force on the screw reinforcing bar 2 is appropriate. It becomes. When attaching to the screw reinforcing bar 2, quick attachment is possible simply by injecting the filler 3 into the container body 4a. In particular, when the filler 3 that can be stored for a long period of time is pre-filled, the actual connection work of the screw reinforcing bar 2 becomes more efficient.

Further, when the first member 7 and the second member 8 are formed of a resin material, as shown in FIG. 7, the cross-sectional shape perpendicular to the longitudinal direction of the first support portion 7c and the second support portion 8c is appropriately set. can do. For example, the outer surface 7c1 of the first support portion 7c and the outer surface 8c1 of the second support portion 8c are formed in a cylindrical shape in accordance with the shape of the space formed by the side surface 2c of the screw reinforcing bar 2 and the inner surface of the female screw portion 1a. With this configuration, the widths of the first support portion 7c and the second support portion 8c can be secured widely, the pressing pressure on the side surface 2c of the screw reinforcing bar 2 increases, and the pressing states of both the supporting portions 7c and 8c are stabilized.
Also in this case, it is preferable that the container body 4a is provided with a notch 10 and a sealing member 11 for injecting and releasing the filler 3.

[Sixth Embodiment]
When a two-component filler composed of, for example, a main agent and a curing accelerator is used as the filler 3, a partition portion 12 is provided inside the container body 4a as shown in FIGS. 8 (a) and 8 (b). In that case, it is preferable that the main agent and the curing accelerator are separated into upper and lower parts. If the partition portion 12 partitions both agents in the lateral direction, for example, the main agent flows in a large amount on one side of the side surface 2c of the screw reinforcing bar 2, and the curing accelerator flows in a large amount on the opposite side, so that the mixing of the two agents is insufficient. May become. However, if both agents are in a vertical positional relationship, when the container body 4a is pressed and broken, both agents are likely to be evenly extruded to any position around the screw reinforcing bar 2. Therefore, both agents are press-fitted between the male screw portion 2a of the screw reinforcing bar 2 and the female screw portion 1a of the receiving member 1 while being well mixed, and the acceleration of hardening of the main agent becomes uniform regardless of the portion.

In order to easily configure the partition portion 12, for example, the container main body 4a in which the main agent and the curing accelerator are individually filled may be arranged in layers. Each container body 4a is provided with the same notch 10 and sealing member 11 as described above. The vertical positional relationship between the main agent and the curing accelerator is arbitrary. In addition to this, a partition portion 12 may be separately provided in the middle of one container body 4a in the vertical direction. Also in that case, a notch 10 and a sealing member 11 are provided in the partition portion 12 and the upper top, for example, the main agent is first injected into the lower space, sealed by the sealing member 11, and then the upper side. It is advisable to inject a curing accelerator into the space.

When the two-component filler 3 is held in the container body 4a, unlike the case where both agents are mixed when the cartridge 4 is opened in this way, the operator partitions the container body 2 prior to mounting on the screw reinforcing bar 2. The two agents may be mixed by opening the part 12. For example, an individual container in which the main agent and the curing accelerator are individually filled is placed inside one container body 4a, and the operator arbitrarily deforms the container body 4a to open each individual container first. , Both agents are mixed inside the container body 4a. Therefore, it is advisable to make the materials and structures of the individual container and the container body 4a different from each other, and set the strength of the individual container to be low. With this configuration, the main agent and the curing accelerator can be reliably mixed.

Further, although it depends on the curing characteristics of the filler 3, when the cartridge 4 is stored for a long period of time with the filler 3 filled in advance, any one of the cartridges 4 is used to distinguish the filling amount of the filler 3. It is advisable to color or add a symbol to the part.

[7th Embodiment]
As shown in FIGS. 9A and 9B, the container body 4a can be composed of a plurality of divided bodies that can be combined with each other. For example, the container body 4a is composed of a cup-shaped small-diameter first container body 4a1 and a large-diameter second container body 4a2 that can be extrapolated to the first container body 4a1. The first container main body 4a1 and the second container main body 4a2 can be obtained, for example, by molding a flat aluminum foil into a cup shape. Further, it may be composed of a pair of resin-molded cylindrical cup-shaped thin-walled containers. In short, any configuration can be used as long as at least one of the first container body 4a1 and the second container body 4a2 can be filled with the filler 3 and the other container body can be combined with the filler 3 to seal the filler 3. There may be.

With this configuration, the filling work of the filler 3 with respect to the cartridge 4 becomes extremely easy. Further, the divided configuration increases the degree of freedom in setting the shape of the cartridge 4, so that the cartridge 4 having a shape that can be easily attached to the end of the screw reinforcing bar 2 can be easily obtained. Becomes more efficient.

In FIG. 9A, the filler 3 is filled between the first container main body 4a1 and the second container main body 4a2, and the cartridge 4 is screwed in a posture in which the large-diameter second container main body 4a2 located on the outside is downward. This is an example of being attached to the end surface 2b of the reinforcing bar 2. In the case of this configuration, the first container main body 4a1 and the second container main body 4a2 are only inserted into each other, and no special locking structure or the like is provided. The small-diameter first container main body 4a1 is filled with the filler 3, and the second container main body 4a2 is externally inserted into the small-diameter first container main body 4a1 so that the bottom surface of the second container main body 4a2 comes into contact with the filler 3. The two container main body 4a2 is substantially integrated with the first container main body 4a1. Therefore, after that, the cartridge 4 is fixed to the end surface 2b of the screw reinforcing bar 2 by using, for example, double-sided tape 6a.

In the case of the configuration of FIG. 9A, when the screw reinforcing bar 2 is screwed into the member 1, the filler 3 can be received and discharged at the innermost part of the member 1. That is, when the cartridge 4 reaches the innermost part of the receiving member 1, the opening side end portion 4a3 of the second container main body 4a2 is located at the innermost part. When the screw reinforcing bar 2 is further screwed from this state, the filler 3 inside the container body 4a is pressed by the end surface 2b of the screw reinforcing bar 2 and the inner surface of the receiving member 1 through the wall portion of the container body 4a, and the container Trying to get out of the main body 4a. At that time, the filler 3 is pushed out to the innermost position of the female screw portion 1a while receiving the side wall portion of the second container main body 4a2 and pressing against the inner surface of the female screw portion 1a of the member 1, and the second container main body 4a2. It is discharged from the opening side end portion 4a3 into the female screw portion 1a. Due to such release, the filler 3 is applied to the entire inner surface of the female threaded portion 1a, and when the screwing of the threaded reinforcing bar 2 is completed, the male threaded portion 2a and the female threaded portion 1a of the threaded reinforcing bar 2 are formed. The filler 3 is surely filled between the two.

On the other hand, as shown in FIG. 9B, after the first container body 4a1 and the second container body 4a2 are combined with each other, the first container body 4a1 located inside may be attached to the end surface 2b of the screw reinforcing bar 2. .. In this case, since the opening side end portion 4a3 of the second container body 4a2 faces the side of the screw reinforcing bar 2, the opening side end portion 4a3 is the female screw portion 1a when the screw reinforcing bar 2 is screwed to the female screw portion 1a. It is prevented from getting caught on the inner surface. As a result, the cartridge 4 can be moved to the innermost part of the female screw portion 1a while maintaining a sound shape when the screw reinforcing bar 2 is screwed, and the filler 3 is placed between the male screw portion 2a and the female screw portion 1a. It can be filled stably.

[8th Embodiment]
As shown in FIGS. 10 (a) and 10 (b), the first container main body 4a1 and the second container main body 4a2 may be configured to be engageable with each other or may be fitted to each other. Here, it is assumed that the first container main body 4a1 is a cup-shaped container, and the second container main body 4a2 is provided with a fitting portion 4a5 that fits into the opening side end portion 4a4 of the first container main body 4a1. The first container main body 4a1 and the second container main body 4a2 can be made of any material such as paper, resin, and aluminum foil.

FIG. 10A is an example in which the opening side end portion 4a4 of the first container main body 4a1 is positioned at the tip end portion opposite to the screw reinforcing bar 2. The first container main body 4a1 is fixed to the end surface 2b of the screw reinforcing bar 2 by using, for example, double-sided tape 6a. In this configuration, when the container body 4a is pressed by the screw reinforcing bar 2 and the receiving member 1 and the second container body 4a2 is disengaged, the filler 3 is discharged to the innermost part of the female screw portion 1a. Can be done. Therefore, the filler 3 can be reliably filled between the male screw portion 2a and the female screw portion 1a.

FIG. 10B is an example in which the first container main body 4a1 is positioned at the tip opposite to the screw reinforcing bar 2. The first container body 4a1 and the second container body 4a2 can be made of various materials. Therefore, for example, in order to facilitate the release of the filler 3, the first container main body 4a1 may be composed of an extremely thin member. In such a case, in order to fix the cartridge 4 to the end surface 2b of the screw reinforcing bar 2, the second container body 4a2, which is a substantial lid member, is provided with a certain degree of rigidity, and the double-sided tape 6a is applied thereto. It can also be pasted.

In the case of this configuration, the discharge position of the filler 3 is the end portion of the cartridge 4 on the side of the screw reinforcing bar 2. However, if the first container body 4a1 is thin and easy to open as described above, even if the filler 3 is released on the side of the screw reinforcing bar 2, the first container is screwed by the subsequent screwing of the screw reinforcing bar 2. The main body 4a1 is easily crushed. Therefore, since the released filler 3 flows to the innermost part of the female screw portion 1a, it can be reliably distributed between the male screw portion 2a and the female screw portion 1a.

[9th Embodiment]
As shown in FIGS. 11A and 11B, the cartridge 4 may have no lid and one of the cartridges may remain open. That is, the filler 3 held inside the cartridge 4 is held in cooperation with the cartridge 4 and the screw reinforcing bar 2, or is held inside by appropriately setting the posture of the cartridge 4.

In FIG. 11A, the cup-shaped first container body 4a1 without a lid is filled with the filler 3, and the opening side end portion 4a4 of the first container body 4a1 is externally fitted to the tip of the screw reinforcing bar 2. is there. In this case, a predetermined amount of the filler 3 is filled inside the first container body 4a1, and the first container body 4a1 is quickly fitted into the end of the screw reinforcing bar 2 so that the filler 3 does not drip. At that time, if the first container main body 4a1 is pushed too strongly toward the screw reinforcing bar 2, the filler 3 overflows. Therefore, it is preferable that the pushing amount of the first container main body 4a1 is kept to such an extent that the filler 3 slightly overflows from the opening side end portion 4a4 or less. When attaching the first container main body 4a1, as shown in FIG. 11A, when the inner side surface of the opening side end portion 4a4 and the outer surface of the screw reinforcing bar 2 are fixed with double-sided tape 6a or the like, the first container main body 4a1 is attached. The installation of 4a1 is more stable.

In the case of the present embodiment, it is preferable that the material constituting the first container main body 4a1 is as easily crushed as possible. That is, when the first container main body 4a1 has excessive rigidity, the screw reinforcing bar 2 enters the inside of the first container main body 4a1, and the filling material 3 inside is from the position of the opening side end portion 4a4 of the first container main body 4a1. It may be released inside the female thread portion 1a. In this case, there is a possibility that the filler 3 does not spread to the position of the inner surface of the female screw portion 1a facing the side surface of the first container main body 4a1. Therefore, it is preferable that the first container main body 4a1 is made of a material that can be easily crushed, such as paper or aluminum foil.

With this configuration, the configuration of the cartridge 4 becomes extremely simple, and the cartridge 4 can be easily attached to the screw reinforcing bar 2, so that the connection work of the screw reinforcing bar 2 becomes efficient.

Such a cartridge 4 may have the configuration shown in FIG. 11 (b). That is, while using the first container body 4a1 which is open on one side, the filler 3 is maintained in a posture in which it does not spill. After the screw reinforcing bar 2 is substantially connected, the first container main body 4a1 filled with the filler 3 is attached to the end surface 2b of the screw reinforcing bar 2 with double-sided tape 6a or the like.

If the first container body 4a1 can be reliably moved to the innermost part of the member 1 by this method, the filler 3 can be surely discharged to the innermost part of the female screw portion 1a. Therefore, the filler 3 can be reliably distributed in the gap between the screw reinforcing bar 2 and the receiving member 1. Further, in the case of this method or the method shown in FIG. 11A, the cartridge 4 has no lid, and only the members constituting the first container main body 4a1 remain inside the receiving member 1. Therefore, the amount of foreign matter existing between the male screw portion 2a and the female screw portion 1a is minimized, and the reliability of the joint portion is improved.

In FIG. 11B, the upper portion of the first container main body 4a1 is open, but the wall portion of the first container main body 4a1 is extended a little further upward, and after filling with the filler 3, the extended portion is provided. May be simply twisted to form a lid. By doing so, the postures that the cartridge 4 can take are wide-ranging, and the connection workability of the screw reinforcing bar 2 is further improved.

[10th Embodiment]
In addition to the above injection method, the cartridge 4 may be temporarily fixed to the member 1 before the screw reinforcing bar 2 is attached to the member 1. When the cartridge 4 is arranged on the end surface 2b of the screw reinforcing bar 2 and the screw reinforcing bar 2 is screwed to the member 1 while receiving the screw reinforcing bar 2, the weight of the screw reinforcing bar 2 increases the burden of the screwing work. Therefore, it becomes difficult to align the tip of the screw reinforcing bar 2 with respect to the female screw portion 1a, and the cartridge 4 may interfere with the periphery of the female screw portion 1a.

Therefore, as shown in FIGS. 12A and 12B, the cartridge 4 can be temporarily fixed to the inner surface of the female screw portion 1a in advance. For example, the temporary fixing member 13 is attached to the lower surface of the container body 4a with double-sided tape 6a or the like. The temporary fixing member 13 is formed of a member having a small volume such as paper or a thin resin plate having a certain degree of rigidity. The outer diameter of the temporary fixing member 13 is made larger than the inner diameter of the female screw portion 1a of the receiving member 1. The shape is a cross shape or the like, and a gap is provided around the container body 4a so that the filler 3 can easily flow downward when the container body 4a is opened later.

When the container body 4a and the temporary fixing member 13 are pushed into the female screw portion 1a from below using various rod-shaped members or the like, the end portion of the temporary fixing member 13 rubs against the inner surface of the female screw portion 1a and is deformed and deformed. The return prevention function is demonstrated. As a result, the cartridge 4 can be temporarily fixed inside the receiving member 1.

With this method, the burden of the work is small because the cartridge 4 is lightweight. Therefore, the alignment of the cartridge 4 with respect to the female screw portion 1a becomes easy, and the arrangement work of the cartridge 4 becomes efficient. The insertion depth of the cartridge 4 with respect to the female screw portion 1a is arbitrary as long as the cartridge 4 does not interfere with the bottom surface 1b of the female screw portion 1a and the filler 3 spills out. As long as the end of the screw reinforcing bar 2 is screwed into the female screw portion 1a, the cartridge 4 can be pushed in by the screwing of the screw reinforcing bar 2.

Further, as the cartridge 4, as shown in FIG. 13, the first container main body 4a1 having an upper opening can be used. Immediately before inserting the first container body 4a1 into the female screw portion 1a, a predetermined amount of the filler 3 is filled, and the first container body 4a1 is attached to the temporary fixing member 13 and inserted into the female screw portion 1a. In this case, since the posture of the first container main body 4a1 is the posture in which the temporary fixing member 13 is downward, it does not matter so much that the upper portion is open. With this configuration, since the filler 3 is smoothly released without any obstacles, the filler 3 can be reliably distributed in the gap between the male screw portion 2a and the female screw portion 1a.

The method of injecting a filler into a threaded reinforcing bar joint of the present invention is widely applicable to a reinforcing bar connecting portion in which a threaded reinforcing bar having a male threaded portion is screwed into a receiving member having a female threaded portion and fixed with the filler.

1 Receiving member 1a Female threaded part 2 Threaded reinforcing bar 2a Male threaded part 2b End face 3 Filler 4 Cartridge 4a Container body 6 Adhesive material 12 Partition 13 Temporary fixing member A Holding member

Claims (6)

When screwing and joining a screw reinforcing bar that constitutes a column on the lower floor and has a male screw portion to a receiving member that is pre-embedded in the upper floor skeleton in the reverse striking method and has an inner surface consisting of a female screw portion and a bottom surface.
A cartridge having a container body in which a filler to be filled is held in a gap between the female screw portion and the male screw portion and a discharge port for discharging the filler is provided, the discharge port is opposite to that of the screw reinforcing bar. In the state of, it is arranged between the end of the screw reinforcing bar and the inner surface of the receiving member.
Along with the screwing of the screw reinforcing bar with respect to the receiving member, the cartridge is pressed by the end surface of the screw reinforcing bar and the inner surface of the receiving member to push the filler at the innermost part of the female screw portion. Emit from
A method of injecting a filler into a screw reinforcing bar joint in which the filler is press-fitted into a gap between the male screw portion and the female screw portion by further screwing the screw reinforcing bar. The method for injecting a filler into a screw reinforcing bar joint according to claim 1, wherein the cartridge is fixed to the end of the screw reinforcing bar with an adhesive or an adhesive material when the screw reinforcing bar is screwed. The cartridge is a temporary fixing member made of a material that can be flexed and deformed and having an outer diameter larger than the inner diameter of the female screw portion, and is fixed to the container body by using an adhesive or an adhesive. The method for injecting a filler into a screw reinforcing bar joint according to claim 1, wherein the cartridge is fixed to the female screw portion when the screw reinforcing bar is screwed. A receiving member that is pre-embedded in the upper floor skeleton in the reverse striking method and has an inner surface consisting of a female screw portion and a bottom surface.
A threaded reinforcing bar having a male threaded portion that constitutes a column on the lower floor and is screwed into the female threaded portion.
With a cartridge that holds a predetermined amount of filler,
The cartridge
A container body in which the discharge port of the filler is provided at a position opposite to the screw reinforcing bar, and
Temporarily fixed to the container body on the side opposite to the discharge port by using an adhesive or an adhesive material, which is made of a material that can be flexed and deformed and has an outer diameter larger than the inner diameter of the female screw portion. With parts,
The cartridge is fixed to the female screw portion by bending and deforming the temporary fixing member while arranging the container body on the back side when the screw reinforcing bar is screwed, and the end surface of the screw reinforcing bar and the inner surface of the receiving member. A threaded reinforcing bar joint structure in which the filler is discharged from the discharge port and filled between the female threaded portion and the male threaded portion by pressing the container body. The screw reinforcing bar joining structure according to claim 4, wherein a gap through which the filler flows is provided around the temporary fixing member. The screw reinforcing bar joining structure according to claim 5, wherein the temporary fixing member has a cross shape.

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