JP4812709B2 - Collet for mortar layer repair work - Google Patents

Description

  In the present invention, when a mortar layer for, for example, tiling formed on the surface of a concrete frame of a concrete building is peeled off from the concrete frame and a separation gap is formed between the surfaces of the concrete frame, an adhesive is formed in the gap. This is related to a collet used for repairing mortar layers.

  FIG. 10 shows a procedure for repairing a tiled mortar layer that has been conventionally performed. In this figure, K is a concrete frame, M is a mortar layer as a tile base to which tile T is stuck, and G is a mortar layer M peeled off from the concrete frame K as shown in (a) and (b). This is a separation gap generated between the surface of the concrete frame K.

  In this mortar layer repair work, first, as shown in (b), the required length is extended from the mortar layer M to the concrete frame K by a drill (not shown) at the joint between adjacent tiles T, T. The adhesive injection hole 12 is opened. Next, as shown in (c), the nozzle 13a of the adhesive injection machine 13 is plunged into the inlet of the adhesive injection hole 12, and the concrete adhesive, for example, the epoxy adhesive 14 is applied at a required pressure. Pressurize and inject into the separation gap G between the concrete frame K and the mortar layer M as shown. After that, the screw shaft 10 whose outer peripheral surface is threaded is manually inserted into the hole 12 into which the adhesive 14 has been injected, and the mortar layer M side and the concrete frame K as shown in FIG. Across the side.

  In the mortar layer repair work as described above, the screw shaft 10 is inserted into the hole 12 into which the adhesive 14 has been injected as shown in FIG. 10 (d), and then the adhesive 14 is solidified to some extent. At this time, the screw shaft 10 is pushed out from the inlet portion of the hole 12 as shown in (e) by the internal pressure of the adhesive injection hole 12 and protrudes, and the adhesive 14 is left as it is. As a result of the solidification, the screw shaft 10 not only forms unnecessary protrusions on the surface side of the tile T, but also has a problem that it does not serve as a connection between the mortar layer M and the concrete frame K.

  In view of the above-described problems, the present invention prevents the screw shaft 10 from being pushed out from the hole 12 after the screw shaft 10 is inserted into the adhesive injection hole 12 into which the adhesive 14 has been injected. An object of the present invention is to provide a collet 1 for holding 10 in an adhesive injection hole 12. Furthermore, the object of the present invention is to repair the mortar layer as described above, when the screw shaft 10 is not inserted into the adhesive injection hole 12, the inlet of the hole 12 is closed and the adhesive 14 is connected to the hole 12. The object is to provide a collet 11 for preventing it from flowing out of the entrance.

Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 covers the concrete frame K from the mortar layer M formed on the surface of the concrete frame K. The concrete adhesive 14 is injected from the opened adhesive injection hole 12 so as to penetrate the peeling gap G of the mortar layer M, and the screw shaft connecting the mortar layer M and the concrete frame K to the hole 12 The collet 1 is used to hold the screw shaft 10 in the hole 12 when the mortar layer is repaired. The collet 1 can be screwed into the screw shaft 10 and has an outer diameter of the hole 10. A cylindrical portion for mounting 2 smaller than the inner diameter of 12 and a skirt-shaped split portion integrally formed with a gradually larger diameter from one end portion of the cylindrical portion 2 and having an outer diameter on the larger diameter end side larger than the inner diameter of the hole 2. Co with groove 3a A Tsu DOO body 3, forming a non-slip portion 7 formed by alternately forming the convex portion 5 and the concave portion 6 extending in a circumferential direction of the collet body 3 in the axial direction on the outer peripheral portion of the collet body 3 The collet body 3 is formed on the inlet side of the hole 12 with the mounting cylinder portion 2 screwed onto the outer end of the screw shaft 10 inserted into the hole 12. It is characterized in that the diameter is reduced and fixed to the inner peripheral surface of the hole 12 by pressure contact.

In the invention according to claim 2, the mortar layer M is peeled off by injecting the concrete adhesive 14 from the adhesive injection holes 12 formed over the concrete skeleton K from the mortar layer M formed on the surface of the concrete skeleton K. A collet 11 used to close the inlet of the hole 12 when repairing the mortar layer so as to permeate the gap G. The collet 11 has an outer diameter smaller than the inner diameter of the hole 12. And a collet body 3 having a skirt-shaped split groove 3a, which is integrally formed with a gradually increasing diameter from one end of the base shaft portion 4, and has an outer diameter on the large diameter end side larger than the inner diameter of the hole 12 , From the collet body 3 formed by forming on the outer peripheral part of the collet body 3 non-slip parts 7 formed by alternately forming the protruding strips 5 and the concave strips 6 extending in the circumferential direction of the collet body 3 in the axial direction. Become By inserting the base shaft portion 4 into the hole 12, characterized in that the collet body 3 and the pressure-contact fixed by diameter hole 12 inner peripheral surface on the inlet side of the hole 12.

A third aspect of the present invention is the collet 1 or 11 for repairing a mortar layer according to the first or second aspect , wherein the collets 1 and 11 are integrally formed of a synthetic resin.

The effect of the invention by the above-described solution means will be described with reference numerals of embodiments to be described later. According to the collet 1 of the invention according to claim 1, the mounting cylinder portion 2 is attached to one end of the screw shaft 10 in use. When the screw shaft 10 is pushed into the adhesive injection hole 12 into which the adhesive 14 has been injected from the other end side in this state, the collet body 3 with the skirt-shaped split groove 3 a is formed in the hole 12. Since the diameter of the collet body 3 is reduced at the inlet, and the large diameter end side of the collet body 3 is pressed against the inner peripheral surface of the hole 12, the screw shaft 10 is held and fixed in the adhesive injection hole 12 by an extremely simple operation. Can do.
Further, according to the present invention, since the non-slip portion 7 is formed on the outer peripheral surface of the collet main body 3, no slip occurs when the large diameter end side of the collet main body 3 presses against the inner peripheral surface of the hole 12, The 12 inlet portions can be accurately closed. Further, the anti-slip portion 7 is formed by alternately forming the ridges 5 and the ridges 6 extending in the circumferential direction of the collet body 3 in the axial direction, so that the structure is simple and the adhesive injection hole 12 is provided. It is possible to effectively prevent the collet main body diameter large end portion from slipping on the inner peripheral surface of the collet body.

According to the collet 11 of the invention according to claim 2, the collet body 3 with the skirt-shaped split groove 3 a is formed into the hole 12 simply by pushing into the adhesive injection hole 12 into which the adhesive 14 has been injected from the base shaft 4 side. The diameter of the collet body 3 is reduced at the inlet, and the large diameter end side of the collet body 3 is in pressure contact with the inner peripheral surface of the hole 12, so that the inlet of the hole 12 into which the adhesive 14 is injected can be quickly closed with an extremely simple operation. be able to.
Further, according to the present invention, since the non-slip portion 7 is formed on the outer peripheral surface of the collet main body 3, no slip occurs when the large diameter end side of the collet main body 3 presses against the inner peripheral surface of the hole 12, The 12 inlet portions can be accurately closed. Further, the anti-slip portion 7 is formed by alternately forming the ridges 5 and the ridges 6 extending in the circumferential direction of the collet body 3 in the axial direction, so that the structure is simple and the adhesive injection hole 12 is provided. It is possible to effectively prevent the collet main body diameter large end portion from slipping on the inner peripheral surface of the collet body.

According to the collets 1 and 11 of the invention according to claim 3, when the collets 1 and 11 are integrally formed of synthetic resin, the manufacturing cost can be remarkably reduced, and the light weight is advantageous for mounting, carrying and storage. .

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is an enlarged front view of a collet 1 according to the present invention, (b) is a left side view of (a), and FIG. 3 is an enlarged longitudinal sectional view of the collet 1, FIG. 3 (a) is a front view of the collet 1 with the skirt-like collet body reduced in diameter, (b) is a left side view of (a), and FIG. It is a partial enlarged front view of the tiled building outer wall. 5 (a) to 5 (d) are explanatory views for explaining the procedure of the tiled mortar layer repair work by using the collet 1 according to the present invention. The collet 1 can be screwed onto the screw shaft 10 and has a cylindrical mounting tube portion 2 whose outer diameter is smaller than the inner diameter of the adhesive injection hole 12 and a gradually increasing diameter from one end of the mounting tube portion 2. And the collet body 3 with a skirt-shaped split groove 3a whose outer diameter on the large diameter end side is larger than the inner diameter of the adhesive injection hole 12, and is inserted into the adhesive injection hole 12 The collet body 3 is reduced in diameter on the inlet side of the adhesive injection hole 12 and fixed to the inner peripheral surface of the hole 12 in a state where the mounting cylinder 2 is screwed to the outer end of the screw shaft 10. I am doing so.

  The structure of the collet 1 according to the present invention will be described in more detail. The collet 1 is integrally formed of a synthetic resin, for example, an epoxy resin, and a screw shaft 10 is formed on the inner peripheral surface of the cylindrical mounting cylinder portion 2. A female screw portion 2a that can be screwed into the male screw portion 10a is formed. The skirt-shaped collet body 3 is formed such that the outer diameter of one end is the same as the outer diameter of the mounting cylinder 2 and the outer diameter of the other end is larger than the inner diameter of the adhesive injection hole 12. The diameter can be reduced by four split grooves 3a provided at regular intervals in the direction, for example, at intervals of 90 °. Further, the collet body 3 has anti-slip 7 formed by alternately forming convex strips 5 and concave strips 6 extending in the circumferential direction on the outer peripheral surface side of the collet main body 3.

  If the dimensions of the collet 1 are shown for reference, the outer diameter of the mounting cylinder 2 is 5 mm, the inner diameter is 3.3 mm, and an M4 female screw 2a is cut on the inner peripheral surface. The axial length of is 3 mm. The outer diameter of the large-diameter side end of the skirt-like collet body 3 is 7 mm, the inner diameter of the small-diameter side end is 4 mm, and the outer diameter of the large-diameter side end when the collet body 3 is reduced is 5. 6 mm. And as shown in FIG. 5, the internal diameter of the hole 12 for the adhesive injection | pouring opened from the mortar layer M to the concrete frame K is 5.3 mm. The outer diameter of the screw shaft 10 is 4 mm, and an M4 male screw 10a is cut on the outer peripheral surface.

  In FIG. 4, which is a partially enlarged front view of a tiled building outer wall, 8 and 9 are vertical joints and horizontal joints formed between the tiles T and T.

  Next, a procedure for repairing a tiled mortar layer using the collet 1 configured as described above will be described with reference to FIGS. 4 and 5. First, as shown in FIG. 5 at a required location where 9 intersects with a drill (not shown), the adhesive injection hole 12 having a required length is formed from the mortar layer M to the concrete frame K, and (a) of FIG. As shown, the nozzle 13a of the adhesive injection machine 13 is plunged into the inlet of the adhesive injection hole 12, and a concrete adhesive, for example, an epoxy adhesive 14 is injected under pressure at a required pressure. It penetrates into the peeling gap G between the concrete frame K and the mortar layer M as shown in FIG.

  In this way, after the concrete adhesive 14 is injected into each adhesive injection hole 12 and penetrated into the peeling gap G, the screw shaft 10 is inserted into the hole 12 into which the adhesive 14 has been injected. Prior to the insertion of the screw shaft 10, as shown in FIG. 5B, the mounting cylinder portion 2 of the collet 1 is screwed into one end portion (rear end portion) of the screw shaft 10, and in this state the screw shaft 10 is inserted into the adhesive injection hole 12 into which the adhesive 14 has been injected from the other end (front end) side, and the collet body 3 of the collet 1 is inserted into the adhesive injection hole 12 as shown in FIG. The collet body 3 is pressed and fixed at the inlet portion in the adhesive injection hole 12 by the elastic repulsive force of the collet body 3, and thereby the screw shaft 10 is placed in the adhesive injection hole 12. To the state shown in (c). The collet 1 may be held and fixed in the hole 12 until the adhesive 14 is cured.

  By reducing the diameter of the collet body 3 of the collet 1 with the mounting cylinder 2 attached to the rear end of the screw shaft 10 as described above and fixing it to the inner peripheral surface of the inlet in the adhesive injection hole 12, Since the screw shaft 10 is fixed in the adhesive injection hole 12 into which the adhesive 14 has been injected, the internal shaft does not cause the screw shaft 10 to be pushed out of the adhesive injection hole 12, so that the adhesive 14 It remains in the adhesive injection hole 12 until it is cured. Thereby, the screw shaft 10 can fully fulfill the role of the connection between the mortar layer M and the concrete frame K. When the adhesive 14 has hardened, as shown in FIG. 5 (d), the vertical joints 8, the horizontal joints 9 and the intersections thereof are loaded with a caulking material 15 for closing the joints, thereby a tiled mortar layer. Repair work is completed.

  When the collet 1 is used, the mounting cylinder portion 2 is screwed into one end portion of the screw shaft 10, and in this state, the screw shaft 10 is inserted into the adhesive injection hole into which the adhesive 14 is injected from the other end portion side. 12, the collet body 3 with the skirt-shaped split groove 3 a is reduced in diameter at the entrance of the hole 12, and the large-diameter end side of the collet body 3 is in pressure contact with the inner peripheral surface of the hole 12. The screw shaft 10 can be held and fixed in the adhesive injection hole 12 by operation.

  In the use of the collet 1, since the anti-slip portion 7 is formed on the outer peripheral surface of the collet main body 3, there is no slip when the large diameter end portion side of the collet main body 3 is pressed against the inner peripheral surface of the hole 12. The screw shaft 10 can be accurately held and fixed in the adhesive injection hole 12. In this embodiment, the anti-slip portion 7 is formed by alternately forming the ridges 5 and the ridges 6 extending in the circumferential direction of the collet body 3 in the axial direction. It is good. However, if it is composed of the ridges 5 and the ridges 6 as in the embodiment, the structure is simple, and the collet body diameter large end side slips on the inner peripheral surface of the adhesive injection hole 12. It can be effectively blocked.

  Further, the collet 1 is not limited to molding with a synthetic resin, but can be integrally formed with a metal material such as stainless steel. However, if it is integrally molded with a synthetic resin, the manufacturing cost can be remarkably reduced and the mounting can be performed with a light weight. It is advantageous for work, carrying and storage.

  6 to 8 show another collet 11 according to the present invention. FIG. 6A is an enlarged front view of the collet 11, FIG. 6B is a left side view of FIG. FIG. 8 (a) is a front view of the collet 11 with the skirt-like collet body reduced in diameter, and FIG. 8 (b) is a left side view of FIG. 9 (a). ) To (d) are explanatory views similar to FIG. 5 for explaining the procedure of the tiled mortar layer repair work using the collet 11. The collet 11 is integrally formed with a base shaft portion 4 having an outer diameter smaller than the inner diameter of the adhesive injection hole 12 and gradually increasing from one end portion of the base shaft portion 4. The collet body 3 is provided with a skirt-shaped split groove 3a larger than the inner diameter of the adhesive injection hole 12. The base shaft portion 4 is inserted into the adhesive injection hole 12, and the collet body 3 is inserted into the adhesive injection hole. The diameter is reduced on the inlet side of 12 and is press-fixed to the inner peripheral surface of the hole 12.

  As with the collet 1, the collet 11 is integrally formed of an epoxy resin, and the collet body 3 has the same structure as the collet body 3 of the collet 1, and therefore, the same numbers are assigned to the constituent members. A description thereof will be omitted. The base shaft portion 4 has a structure in which the inside of the mounting cylinder portion 2 of the collet 1 is closed, and is formed of a short columnar body as illustrated.

  The procedure for repairing the tiled mortar layer using the collet 11 will be described with reference to FIG. 9. First, as shown in FIG. 4, the vertical mortar 8 and the horizontal joint 9 intersect with each other from the mortar layer M. An adhesive injection hole 12 having a required length is formed over the concrete frame K, and the nozzle 13a of the adhesive injection machine 13 is provided at the inlet of the adhesive injection hole 12 as shown in FIG. The concrete adhesive 14 is injected under pressure at a required pressure and penetrates into the separation gap G between the concrete frame K and the mortar layer M as shown in FIG.

  In this way, the concrete adhesive 14 is injected into each adhesive injection hole 12 and penetrates into the peeling gap G, and the adhesive 14 is filled almost leaving the inlet portion of the adhesive injection hole 12. 9 (b), the collet 11 is pushed into the inlet portion of the adhesive injection hole 12 from its base shaft portion 4, and the collet body 3 with the skirt-shaped split groove 3a is compressed at the inlet portion of the hole 12. By making the diameter, the large-diameter end side of the collet body 3 is pressed and fixed to the inner peripheral surface of the hole 12 by the elastic repulsive force of the collet body 3, and a state as shown in FIG.

  As described above, the collet body 3 of the collet 11 is reduced in diameter and fixed to the inner peripheral surface of the inlet portion in the adhesive injection hole 12, thereby closing the inlet of the hole 12 and ensuring that the adhesive 14 flows out to the outside. Can be prevented. When the inlet of the adhesive injection hole 12 is closed in this way, as shown in FIG. 5 (d), the joint material or caulking material 15 for filling the joints is loaded into the vertical joints 8, the horizontal joints 9 and the intersections thereof. The tiled mortar layer repair work will be completed.

  When the collet 11 is pushed into the adhesive injection hole 12 into which the adhesive 14 has been injected from the base shaft 4 side, the collet body 3 with the skirt-shaped split groove 3a is reduced in diameter at the entrance of the hole 12, Since the large diameter end side of the collet body 3 is in pressure contact with the inner peripheral surface of the hole 12, the inlet of the hole 12 into which the adhesive 14 has been injected can be quickly closed by an extremely simple operation.

  In the use of the collet 11 as described above, since the anti-slip portion 7 is formed on the outer peripheral surface of the collet main body 3, slip occurs when the large diameter end side of the collet main body 3 presses against the inner peripheral surface of the hole 12. Therefore, the inlet of the hole 12 can be accurately closed.

  The collet 11 is not limited to molding with a synthetic resin, and can be integrally formed with a metal material such as stainless steel. However, if it is integrally formed of synthetic resin, the manufacturing cost can be remarkably reduced, and it is lightweight and advantageous for mounting, carrying and storing.

(a) is an enlarged front view of the collet of the present invention, and (b) is a left side view of (a). It is an enlarged vertical sectional view of the collet. (a) is a front view of the collet skirt-shaped collet body with the diameter reduced, and (b) is a left side view of (a). It is a partial enlarged front view of the tiled building outer wall. (a)-(d) is explanatory drawing explaining the procedure of tiled mortar layer repair work by use of a collet same as the above. (a) is an enlarged front view showing another collet of the present invention, and (b) is a left side view of (a). It is an enlarged vertical sectional view of the collet. (a) is a front view of the collet skirt-shaped collet body with the diameter reduced, and (b) is a left side view of (a). (a)-(d) is explanatory drawing similar to FIG. 5 explaining the procedure of the tiled mortar layer repair construction by use of the collet. It is explanatory drawing which shows the procedure of the tiled mortar layer repair work currently performed conventionally.

Explanation of symbols

K concrete frame M mortar layer 1,11 collet 2 mounting cylinder part 3 collet body 3a split groove 4 base shaft part 5 ridge part 6 dent part 7 non-slip part 10 screw shaft 12 adhesive injection hole 14 adhesive for concrete

Claims (3)

The adhesive for concrete is injected from the adhesive injection hole opened over the concrete frame from the mortar layer formed on the surface of the concrete frame to penetrate into the peeling gap of the mortar layer, and the mortar layer is put in the hole This is a collet used to hold the screw shaft in the hole in the mortar layer repair work for inserting the screw shaft connecting the concrete frame and the concrete frame. The collet can be screwed into the screw shaft and has an outer diameter. A mounting cylinder portion smaller than the inner diameter of the hole and a skirt-shaped split groove that is integrally formed with a gradually increasing diameter from one end portion of the cylinder portion and whose outer diameter on the large diameter end side is larger than the inner diameter of the hole A collet body comprising a collet body formed on the outer peripheral portion of the collet body by forming an anti-slip portion formed alternately in the axial direction with protruding strips and concave strips extending in the circumferential direction of the collet body. Na Thus, the collet body is reduced in diameter on the inlet side of the hole and fixed to the inner peripheral surface of the hole by press-fitting in a state where the mounting cylinder is screwed onto the outer end of the screw shaft inserted into the hole. A collet for repairing mortar layers, characterized by In repairing the mortar layer, the adhesive for concrete is injected from the adhesive injection hole opened over the concrete body from the mortar layer formed on the surface of the concrete body and penetrates into the separation gap of the mortar layer. A collet used for closing an inlet of a hole, and the collet is integrally formed with a base shaft portion whose outer diameter is smaller than the inner diameter of the hole and a gradually larger diameter from one end portion of the base shaft portion. A collet body with a skirt-shaped split groove whose outer diameter on the large end side is larger than the inner diameter of the hole , and the protruding strips and recesses extending in the circumferential direction of the collet body are alternately formed in the axial direction. A collet body formed by forming an anti-slip portion on the outer periphery of the collet body, and inserting the base shaft portion into the hole and reducing the diameter of the collet body on the inlet side of the hole to Pressure on the surface Mortar layer repair work collet being characterized in that so as to fix. The collet for repairing a mortar layer according to claim 1 or 2 , wherein the collet is integrally formed of a synthetic resin.

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