JP7638484B2 - Cartridge for fastening the fixing element - Google Patents

Description

The present invention relates to a cartridge for fixing fixing elements, which contains hydraulic powder for fixing fixing elements in holes drilled in a concrete structure, and is used for post-installation of fixing elements.

In order to improve the structural strength and joint strength of concrete structures, fixing elements such as anchor bolts, reinforcing bars, lock bolts, tension rods, and screws are embedded in the concrete structure. Such fixing elements are often embedded as a post-construction process after the concrete structure has been created. In this case, holes for embedding the fixing elements are drilled in the concrete structure, and with the fixing elements inserted into the holes, a discharge gun is used to inject and harden an adhesive into the holes to fix the fixing elements.

Such adhesives can be organic or inorganic, with hydraulic powders that mainly consist of cement being used as inorganic adhesives. The hydraulic powder is mixed with water to form a hydraulic composition and then injected into the hole, but it is time-consuming to measure out the water and hydraulic powder separately at the construction site and then mix them together.

For example, Patent Documents 1 and 2 below disclose hydraulic composition cartridges that are attached to discharge guns and contain predetermined amounts of water and hydraulic powder in a mutually isolated state. These cartridges have a discharge outlet at the tip of the cylindrical cartridge body, and a seal is slidably arranged at the rear end opening. In addition, in Patent Document 1, water is placed in a holding bag, and in Patent Document 2, water is placed in a glass container, and both are contained in the cartridge together with the hydraulic powder.

In Patent Document 1, the cartridge is attached to a discharge gun, and the water flows out by breaking the holding bag with the pressing force (increased internal pressure of the cartridge) generated when the sealing body is pressed by the pressing rod of the discharge gun, and the cartridge and the discharge gun are vigorously shaken to mix with the hydraulic powder.

In Patent Document 2, a stirring rod is inserted through the discharge port, and the water and hydraulic powder are mixed while the glass container is broken by the stirring rod. At this time, the pieces of the broken glass container are used as aggregate for the hydraulic composition (mixture of water and hydraulic powder).

Japanese Patent Application Publication No. 3-81454 JP 2017-165448 A

In Patent Document 1, it is said that the holding bag is broken by the pressing force of the discharge gun, but it is not always possible to reliably break the holding bag by pressing force alone. Even if it can be broken, the cartridge and the discharge gun are vigorously shaken together to mix the water and hydraulic powder, but the holding bag gets in the way and there is a limit to how uniform the mixing can be. Therefore, as in Patent Document 2, it is possible to insert a stirring rod from the discharge port before attaching the cartridge to the discharge gun, and to actively break and stir the mixture with the stirring rod. However, since the holding bag exists in a free state (non-retained state) inside the cartridge, the holding bag becomes entangled with the stirring rod and cannot be properly stirred, so there is still a limit to how uniform the mixing can be.

On the other hand, Patent Document 2 uses a glass tube, so there is no problem with glass fragments becoming entangled around the stirring rod as in Patent Document 1. However, it is envisioned that the fragments of the glass container will be used as aggregate for the hydraulic composition, and it takes time and effort to crush the hydraulic composition finely enough that it can be discharged from the discharge port. In addition, if there is variation in the size of the glass fragments, there is a concern that the uniform dispersion will decrease and the adhesion strength will decrease.

The present invention aims to solve the above problems by providing a cartridge for fastening fixed elements that can easily and reliably mix water and hydraulic powder using a stirring rod.

To achieve this, the present invention takes the following steps.
(1) A cartridge for fastening a fastening element, which contains hydraulic powder for fastening a fastening element in a hole drilled in a concrete structure,
a cylindrical cartridge body having a discharge port at its front end and an open rear end;
A lid that closes the discharge port;
a seal that seals a rear end opening of the cartridge body and is slidable within the cartridge body toward the discharge port;
a ring member having an opening at a center portion and disposed within the cartridge body between the discharge port and the sealing body;
a film bonded to the ring member so as to close the central opening of the ring member;
an accommodation space within the cartridge body is partitioned via the film into an ejection port side space and a rear end side space,
a cartridge for fastening a fixing element, wherein water is accommodated in the discharge port side space and hydraulic powder is accommodated in the rear end side space, the water and hydraulic powder being isolated from each other via the film.
(2) The cartridge for fastening a fixing element according to (1), wherein the ring member is slidable toward the discharge port side.
(3) An attachment margin is formed along the inner peripheral edge of the ring member,
The cartridge for fastening a fixing element according to (1) or (2), wherein the film is attached at the attachment portion.
(4) The cartridge for fastening a fixing element according to any one of (1) to (3), wherein a protrusion for improving liquid-tightness is formed on the outer peripheral surface of the ring member.
(5) The cartridge for fastening a fixing element according to (4), wherein the convex rib is formed in a shape that allows the ring member to slide easily toward the discharge port side and difficultly toward the rear end opening side.

The cartridge of the present invention has an internal storage space divided into two by a film, and each contains water and hydraulic powder in advance in an isolated state, eliminating the need to measure them at the construction site.

When mixing the water and hydraulic powder, the film can be broken by inserting a stirring rod through the discharge port. Since the film is attached to a ring member that is fitted inside the cartridge body, it does not impede the mixing of the water and hydraulic powder when stirring, and does not wrap around the stirring rod, allowing for easy and reliable mixing. At this time, the ring member is open in the center, so it does not get in the way when stirring and mixing. Furthermore, there is no need to finely crush the film, so a stable adhesion force can be obtained.

When the cartridge is attached to the discharge gun and the adhesive (hydraulic composition) is discharged, the seal is pressed and slid in the direction of the discharge port by the pressure rod of the discharge gun. At this time, if the ring member is fixed inside the cartridge body, the sliding of the seal is stopped midway by the ring member, and the amount of adhesive remaining in the cartridge increases. Therefore, if the ring member is also slidable in the direction of the discharge port, the ring member can be slid together with the seal to the limit in the direction of the discharge port, thereby reducing loss of adhesive.

There are various methods for joining the film to the ring member, such as gluing, fusing, welding, sandwiching, inserting, and fastening with a fastening member, but productivity is high if an attachment area is provided on the inner peripheral edge of the ring member and the film is attached to the attachment area by gluing or welding.

By forming a ridge on the outer circumferential surface of the ring member, it is possible to improve the liquid-tightness between the ring member and the cartridge body, i.e., the ability to prevent water leakage.

If the ridges are shaped so that the ring member can slide easily toward the discharge port side but not easily toward the rear end opening side, it is possible to improve the ease of discharging the adhesive while ensuring good liquid tightness.

FIG. FIG. FIG. 4 is a central cross-sectional view of the ring member. FIG. 13 is a cross-sectional view of the film being broken through by the stirring rod. FIG. 11 is a cross-sectional view showing the state in which the mixture is being mixed by a stirring rod. 1 is a cross-sectional view showing a state in which an adhesive is being discharged by a discharge gun. 11 is a cross-sectional view showing a state in which the adhesive has been completely discharged from the discharge gun. FIG.

A representative embodiment of the present invention will be described below. As shown in FIG. 1, the cartridge 1 has a cartridge body 10, a sealing body 11, a ring member 12, a film 13, and a lid 14, and contains water W and hydraulic powder P in an isolated state.

The cartridge body 10 is a cylindrical hollow container made of synthetic resin, and as shown in Figures 4 and 5, has a discharge port 10a at its tip and is open at its rear end. The diameter of the discharge port 10a is smaller than the diameter of the cartridge body 10, and is formed to protrude from the top surface (tip surface) of the cartridge body 10. A screw thread is formed on the outer periphery of the discharge port 10a, and before using the cartridge 1, a lid 14 is screwed onto the discharge port 10a to close it. This prevents the water W from spilling from the discharge port 10a or drying out during storage or transportation of the cartridge 1, which would reduce the capacity of the cartridge.

The sealing body 11 is a resin molded product that seals the rear end opening of the cartridge body 10, and the inner shape of the cartridge body 10 and the outer shape of the sealing body 11 are the same. Before the cartridge 1 is used, the sealing body 11 is placed at the rear end of the cartridge body 10 as its initial position. The sealing body 11 is pressed into the inside of the cartridge body 10 to such an extent that it can slide from its initial position toward the discharge port 10a. The sealing body 11 seals the rear end opening of the cartridge body 10, but since the object to be sealed is a highly viscous paste made of hydraulic powder P and hydraulic composition M, which will be described in detail later, it does not require the same level of sealing ability as the ring member 12. Therefore, the outer peripheral surface of the sealing body 11 may be flat, but it is also preferable to provide one or more protrusions to improve sealing ability.

The thickness of the sealing body 11 (axial length of the cartridge 1) is not particularly limited as long as it can secure a certain bonding area with the cartridge body 10 to seal the powder or paste, but it is preferable for the thickness to be as small as possible. This is because it allows the cartridge 1 to be as compact as possible while maintaining a large internal storage space. It also prevents the pressing force of the pressing body 11 by the pressing rod 103 of the discharge gun 100 (see Figure 7) from becoming greater than necessary when injecting the adhesive. The sealing body 11 may be a flat disk shape or a tray shape with an outer peripheral wall, so long as its outer shape matches the inner diameter of the cartridge body 10.

The ring member 12 is a one-piece molded product made of synthetic resin, and is embedded in the cartridge body 10 between the discharge port 10a and the sealing body 11. As shown in Figures 3 and 4, the ring member 12 is a circular ring member with an opening in the center. An attachment margin 12b is formed on the inner edge of the outer peripheral wall 12a of the ring member 12, bulging outward in the radial direction around the entire circumference. The back side of the attachment margin 12b is hollow to reduce weight. In other words, if the outer peripheral wall 12a of the ring member 12 is regarded as an outer cylindrical part, it has an inner cylindrical part 12c with a diameter one size smaller than the diameter of the outer peripheral wall 12a, and a flange 12b is formed around the entire circumference from the upper edge of the inner cylindrical part 12c toward the radial outward direction from the outer peripheral wall 12a, and the flange 12b is used as an attachment margin. In addition, in order to improve the strength of the attachment margin 12b, it is also preferable to provide multiple ribs in parallel in the circumferential direction on the back side of the attachment margin 12b between the inner tube portion 12c and the outer peripheral wall 12a. The attachment margin 12b is formed at a position lower than the upper end of the outer peripheral wall 12a. As a result, the outer periphery of the attachment margin 12b is surrounded by the outer peripheral wall 12a.

The film 13 is joined to the ring member 12 so as to cover the central opening of the ring member 12. The film 13 is attached to the ring member 12 at the attachment area 12b. Methods for attaching the film 13 include adhesion and welding, but adhesion is preferred as it has high productivity. In this case, since the outer periphery of the attachment area 12b is surrounded by the outer periphery wall 12a, the film 13 can be easily positioned and placed on the attachment area 12b in the attachment process.

The material of the film 13 is not particularly limited as long as it has a rigidity sufficient to prevent it from being broken by the weight or internal pressure of the water W or hydraulic powder P contained inside the cartridge 1, and can be broken by the stirring rod B described below. Typically, a film made of a metal or alloy such as aluminum or copper, or a resin film can be used. If the film is made of a thermoplastic resin, it can be welded to the ring member 12.

The film 13 is attached to the ring member 12, the central opening of which is blocked, and the ring member 12 is fitted inside the cartridge body 10, so that the internal storage space of the cartridge body 10 is divided into an outlet 10a side space and a rear end side space via the film 13. Water W is pre-stored in the outlet 10a side space, and hydraulic powder P is pre-stored in the rear end side space. In other words, the water W and hydraulic powder P are pre-stored in the cartridge 1, isolated from each other via the film 13.

For this reason, a plurality of ridges 12d are formed all around the outer circumferential surface of the ring member 12. In this embodiment, ridges _12d1 , _12d2 , and _12d3 are formed at three locations, respectively, at the upper end, center, and lower end of the ring member 12. The presence of these ridges 12d improves the liquid-tightness (water leakage prevention) between the ring member 12 and the cartridge body 10.

The upper end protrusion _12d1 is formed in a mountain shape with the same inclination angle on the ejection port 10a side (upper side) and the rear end opening side (lower side) of the cartridge 1. The central protrusion _12d2 is also formed in a mountain shape, but the inclination angle _θ1 on the ejection port 10a side (upper side) with respect to the outer circumferential wall 12a is larger than the inclination angle _θ2 on the rear end opening side (lower side) with respect to the outer circumferential wall 12a. The lower end protrusion _12d3 is formed in a half mountain shape with the inclination angle _θ1 on the ejection port 10a side (upper side) with respect to the outer circumferential wall _12a being the same angle as the inclination angle _θ1 of the same surface in the central protrusion 12d2. Due to the special shapes of these protrusions _12d2 and _12d3 , the ring member 12 can slide easily toward the ejection port 10a side, but it is difficult to slide toward the rear end opening side. This ensures good liquid-tightness between the ring member 12 and the cartridge body 10, while preventing the ring member 12 from accidentally sliding toward the rear end opening of the cartridge 1 when the stirring rod B breaks through the film 13, and allows the ring member 12 to slide smoothly toward the discharge port 10a by the pressing rod 103 of the discharge gun 100 when the adhesive is injected. It is also preferable to apply a lubricant such as Vaseline to the outer circumferential surface of the ring member 12 as necessary.

The amount of water W and hydraulic powder P to be pre-stored in the cartridge 1 may be a conventionally known blend amount according to the type and size of the fixing element and the required adhesive strength. As the hydraulic powder P, any conventionally known adhesive for this type can be used without any particular restrictions. Specifically, various Portland cements and ecocements such as normal, early strength, super early strength, low heat and medium heat, as well as various mixed cements obtained by mixing these cements with fly ash, blast furnace slag, silica fume or limestone fine powder, alumina cement, super rapid hardening cement, rapid hardening cement, quick setting cement, fine cement, magnesia, etc. may be used. The hydraulic powder P may also contain fine aggregate. Examples of fine aggregate include slag fine aggregate, silica sand, mountain sand, sea sand, land sand, river sand, recycled fine aggregate, cement clinker, glass beads, etc. In addition to fine aggregate, additives such as high-performance water-reducing agents, high-performance AE water-reducing agents, fluidizing agents, powdered surfactants containing water-reducing agents, cement polymers, coarse aggregates, hardening accelerators such as quick-setting agents and quick-hardening agents, hardening retarders, expansion agents, waterproofing agents, rust inhibitors, pigments, thickeners, shrinkage reducing agents, extenders, and fibers can also be blended. These cements, fine aggregates, and additives can be used alone or in combination of two or more types.

Tap water can be used as the water W, but setting retarders, setting accelerators, water reducers, thickeners, etc. may be added as necessary.

The method of pre-filling the cartridge 1 with water W and hydraulic powder P is to insert the ring member 12 into the cartridge body 10 from the rear end opening with the outlet 10a facing down, then fill a predetermined amount of hydraulic powder P, and press the sealer 11 into the cartridge body 10 to seal the rear end opening. Next, the cartridge body 10 is turned upside down to fill a predetermined amount of water through the outlet 10a, and the outlet 10a is then closed with the lid 14. During storage or transportation, the cartridge 1 can basically be stood upright with the outlet 10a facing up, as shown in Figure 1.

Next, a method of using the cartridge 1 will be described. The lid 14 is removed from the storage state shown in Fig. 1, and a dedicated stirring rod B is inserted through the discharge port 10a as shown in Fig. 4. The stirring rod B is made of metal. The stirring rod B is then inserted through the water W area to the back of the cartridge 1 (the rear end opening side), thereby breaking through the film 13. At this time, the special shapes of the ridges _12d2 and _12d3 prevent the ring member 12 from accidentally sliding toward the rear end opening side.

When the film 13 is broken, the water W flows downward from the central opening of the ring member 12 and mixes with the hydraulic powder P. Then, as shown in FIG. 5, the stirring rod B is pushed to the innermost end (bottom end) of the cartridge 1 and rotated while moving it up and down and left and right to mix and stir the water W and hydraulic powder P, resulting in hydraulic composition M, which serves as the adhesive. Stirring with the stirring rod B may be done manually, but it is more efficient to attach it to a rotating tool such as an impact driver (not shown). At this time, the film 13 remains attached to the ring member 12, so the film 13 does not hinder the stirring efficiency of the hydraulic composition M.

After the water W and hydraulic powder P are sufficiently stirred to obtain a smooth hydraulic composition M, as shown in FIG. 6, a discharge nozzle 101 is attached to the discharge port 10a, and then the nozzle is attached to a known discharge gun 100. Then, by operating the operating lever 102 and pushing and sliding the sealing body 11 toward the discharge port 10a side with the pressing rod 103, the hydraulic composition M is discharged from the tip of the discharge nozzle 101. This allows the hydraulic composition M to be injected into holes drilled into the concrete structure for fastening the fixing element (not shown).

Examples of concrete structures include buildings, tunnels, bridges, etc. Examples of fixing elements include anchor bolts, reinforcing bars, rock bolts, tension members, screws, etc.

When the pressure rod 103 of the discharge gun 100 is pushed further and further in, the sealing body 11 pushed in by the pressure rod 103 comes into contact with the ring member 12. However, since the ring member 12 can easily slide toward the discharge port 10a, the ring member 12 also slides together with the sealing body 11 to the limit on the discharge port 10a side. This reduces loss of hydraulic composition M, allowing it to be used up almost to the very end.

The above describes a typical embodiment of the present invention, but the present invention is not limited to this embodiment and various modifications are possible without departing from the scope of the present invention. For example, the film 13 can be attached to the ring member 12 by gluing or welding, or the film 13 can be joined to the ring member 12 by making the ring member 12 into a divided member and sandwiching it between the outer wall 12a, inserting it into a groove formed on the inner surface of the outer wall 12a, or engaging it with a locking member such as a locking pin.

Also, the ring member 12 may not be provided with an attachment margin 12b, and may be attached to the upper or lower surface of the ring member 12. Even if an attachment margin 12b is formed, the upper or lower surface of the outer peripheral wall 12a and the attachment surface of the attachment margin 12b may be flush with each other at the same height, or the attachment surface of the attachment margin 12b may protrude upward or downward from the upper or lower surface of the outer peripheral wall 12a.

Depending on the amount of water W stored, it is not necessary to make the storage space for water W small and make the ring member 12 slidable.

It is not necessary to form the protruding strips 12d on the outer surface of the ring member 12. Even if they are formed, the number is not limited to three as in the above embodiment, and one, two, or four or more may be formed. In this case, it is not necessary to form the protruding strips 12d in a special shape, and all the protruding strips 12d may have a shape like the protruding strip _12d1 , in which the inclined surface on the discharge port 10a side and the inclined surface on the rear end opening side with respect to the outer circumferential wall 12a are the same.

Furthermore, even if the convex ribs 12d are formed in a special shape that allows the ring member 12 to slide easily toward the discharge port 10a side but does not slide easily toward the rear end opening side, all of the convex ribs 12d can be formed like convex ribs _12d2 in which the inclination angle _θ1 on the discharge port 10a side relative to the outer peripheral wall 12a is an obtuse angle and the inclination angle _θ2 on the rear end opening side relative to the outer peripheral wall 12a is an acute angle, or like convex ribs _12d3 in which the inclination angle _θ1 on the discharge port 10a side relative to the outer peripheral wall 12a is an obtuse half-mountain shape.

As long as the stirring rod B has a shape that allows it to be inserted through the discharge port 10a, it is not limited to the wavy shape shown in the figure, and various shapes, such as an L-shaped, N-shaped, or J-shaped tip, can be used.

1 Cartridge 10 Cartridge body 10a Discharge port 11 Sealing body 12 Ring member 12a Outer peripheral wall 12b Attachment area 12d Convex strip 13 Film W Water P Hydraulic powder M Hydraulic composition (adhesive)
B Stirring rod 100 Discharge gun 101 Discharge nozzle 103 Press rod

Claims (2)

A cartridge for fastening a fastening element, the cartridge containing hydraulic powder for fastening a fastening element in a hole drilled in a concrete structure,
a cylindrical cartridge body having a discharge port at its front end and an open rear end;
A lid that closes the discharge port;
a seal that seals a rear end opening of the cartridge body and is slidable within the cartridge body toward the discharge port;
a ring member having an opening at a center portion and disposed within the cartridge body between the discharge port and the sealing body;
a film bonded to the ring member so as to close the central opening of the ring member;
an accommodation space within the cartridge body is partitioned via the film into an ejection port side space and a rear end side space,
Water is contained in the discharge port side space, and hydraulic powder is contained in the rear end side space, separated from each other by the film,
The ring member has an outer peripheral surface having three or more mountain-shaped protrusions formed thereon, the upper end, the center portion, and the lower end, for improving liquid-tightness;
A cartridge for fastening a fixed element, wherein the inclination angle of the central convex rib on the discharge port side relative to the outer peripheral wall of the ring member is greater than the inclination angle of the rear end opening side relative to the outer peripheral wall, so that the ring member is formed in a shape that makes it easy to slide toward the discharge port side but difficult to slide toward the rear end opening side . An attachment margin is formed along an inner peripheral edge of the ring member,
The cartridge for fastening a fixing element according to claim 1 , wherein the film is attached at the attachment portion.

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