JP5383082B2 - Sleeve for wiring and piping materials - Google Patents

Description

  The present invention relates to a sleeve for wiring / piping material embedded in a concrete construction part.

  Conventionally, when a through hole is formed in a concrete wall, a cylinder such as a paper tube is previously inserted between the molds, thereby forming a through hole in the cylinder portion. However, in order to arrange the cylinders so as to extend between the molds, it is very difficult to insert the reinforcing bars between the molds. Moreover, although the cylinder was cut | disconnected according to the length between mold forms, this cutting operation was troublesome.

  Therefore, as shown in FIG. 10, there is a sleeve 11 that adjusts the length by screwing the cylindrical bodies 12 and 13 and relatively rotating the cylindrical bodies 12 and 13 (for example, Patent Documents). 1). Further, as shown in FIG. 11, there is a sleeve 21 that adjusts the length by fitting the cylinders 22 and 23 and sliding the cylinders 22 and 23 relatively in the longitudinal direction (for example, Patent Document 2). In the sleeve 21, engagement grooves 22a and 22a arranged in the longitudinal direction are provided in one cylindrical body 22, and an engagement plate 23a is provided in the other cylindrical body 23, and the engagement grooves 22a and the engagement plate 23a are provided. The relative positions of the two cylinders 22 and 23 are maintained by the engagement with the.

JP-A-7-145880 JP-A-10-121723

  However, in the conventional sleeve 11 shown in FIG. 10, in order to change the length of the sleeve 11, the cylinders 12 and 13 have to be rotated, which is troublesome. In particular, in order to arrange the sleeve 11 in a narrow space between the molds, the sleeve 11 was put in a state where the entire length of the sleeve 11 was made as short as possible and then extended to an appropriate length. It took time to perform 13 rotation operations.

  Further, in the conventional sleeve 21 shown in FIG. 11, in the engagement between the engagement groove 22a and the engagement plate 23a, the length can be adjusted only in the pitch unit in which the engagement grooves 22a and 22a are arranged. That is, there is a problem that fine adjustment cannot be performed, so that a gap is formed between the sleeve 21 and the mold.

  The present invention has been made to solve the above-described conventional drawbacks, and an object of the present invention is to provide a sleeve for wiring / piping materials that can be quickly extended to a predetermined length. It is in.

In order to achieve the above object, the sleeve for wiring / piping material according to the present invention has the following configuration. That is,
The sleeve for wiring / piping material according to the first aspect of the present invention is provided between the molds for forming the concrete construction portion so as to form a through hole through which the wiring / piping material passes in the concrete construction portion. It is the sleeve which is arrange | positioned and is embed | buried under the said concrete construction part. This sleeve includes a hollow inner cylindrical body having a spiral groove on the outer surface and a hollow outer cylindrical body covering the outer periphery of the inner cylindrical body. And the said exterior cylinder is provided with the elastic piece which can be bent outward, The elastic piece protrudes inward of the said exterior cylinder, and has a latching | locking part engaged with the said spiral groove. . Therefore, with respect to the sliding movement in the insertion direction in which the inner cylindrical body is inserted into the outer cylindrical body, the locking force with which the locking portion locks the spiral groove is relatively large. In addition, the sliding force in the insertion direction is limited, and the sliding force is relatively small for the sliding movement in the pulling direction for pulling out the inner tubular body from the outer tubular body. An engaging portion between the locking portion and the spiral groove is formed so as to allow sliding movement in the pulling direction. The sleeve is inserted between the molds in a state in which the insertion cylinder and the exterior cylinder are fitted and contracted, and is relatively inserted between the molds. Is pulled out in the pulling direction with respect to the outer cylinder, and the outer cylinder is relatively moved to the insertion cylinder in a state where the engaging portion is engaged with the spiral groove. The mold frame is finely adjusted by rotating relative to it , and the inner cylinder is not slid in the insertion direction with respect to the outer cylinder by the locking force. You can stretch between them.

  According to this sleeve, the length of the sleeve is adjusted by fitting the inner cylinder and the outer cylinder and changing the relative position in the longitudinal direction. Here, the inner cylindrical body is provided with a helical groove on the outer surface, and the outer cylindrical body is provided with an elastic piece having a locking portion that engages with the helical groove. Therefore, the relative position in the longitudinal direction of the insertion cylinder and the exterior cylinder changes by relatively rotating the exterior cylinder along the spiral groove so that the locking portion moves in the spiral groove. The length of the sleeve can be adjusted. In addition, with respect to the sliding movement in the pulling direction in which the inner cylindrical body is pulled out from the outer cylindrical body, the locking force with which the locking portion locks the spiral groove is relatively small. Allow slide movement. For this reason, by relatively pulling the inner cylinder in the pulling direction with respect to the outer cylinder, the inner cylinder can be slid in the pulling direction with respect to the outer cylinder. Can be stretched.

  Therefore, when this sleeve is placed between the molds for forming the concrete construction part, the sleeve is contracted by fitting the inner cylinder and the outer cylinder, and inserted between the molds. In the space between the molds, the inner insertion cylinder is pulled in the pulling direction relative to the outer cylinder so as to extend the sleeve, and the engaging portion is engaged with an appropriate position of the spiral groove. At this time, if the length of the sleeve is less than the interval between the molds, the engaging portion moves in the spiral groove so as to reach the interval, and the outer cylindrical body is relatively inserted into the insertion cylindrical body. The length of the sleeve is finely adjusted by rotating with respect to. In this way, relatively pulling the inner cylindrical body with respect to the outer cylindrical body, extending the sleeve, and further inserting the outer cylindrical body relatively with the locking portion engaged with the spiral groove. By rotating relative to the cylinder and finely adjusting the length of the sleeve that is insufficient, the sleeve can be quickly extended to a predetermined length between the molds. At this time, the sliding force in the insertion direction in which the insertion cylinder is inserted into the outer cylinder is relatively large, and the sliding movement in the insertion direction is restricted. Therefore, the sleeve can be prevented from shrinking, and the sleeve can be stretched between the molds.

  Further, the sleeve for wiring / piping material according to the invention of claim 2 is the sleeve of claim 1, in order to prevent the outer cylinder from moving relative to the insertion cylinder. There is provided a screw attachment portion to which a screw is attached, which presses the outer surface of the insertion cylinder or is screwed into the outer surface. In this way, the screw is attached to the screw mounting portion of the outer cylinder, and the outer surface of the inner cylinder is pressed with the screw, or the screw is screwed into the outer surface of the inner cylinder, so that The sleeve can be reliably maintained at a predetermined length by preventing relative movement with the insertion tube.

  Further, the wiring / piping material sleeve according to the invention described in claim 3 is the sleeve according to claim 1 or 2, wherein the outer cylinder is defined as an inlet side into which the insertion cylinder is inserted. On the opposite side, there is provided a connection port to which a cylindrical body into which the insertion cylindrical body can be inserted is connected. In this way, by connecting the cylinder to the connection port of the exterior cylinder, the length including the cylinder can be increased, and thereby the single length of the exterior cylinder can be set short. .

  According to a fourth aspect of the present invention, there is provided the sleeve for wiring / piping material according to any one of the first to third aspects, wherein the inserted tubular body is separated from the outer tubular body. A flange portion extending outward is provided at the end on the side.

  According to the sleeve for wiring / piping material according to the present invention, due to the configuration of the spiral groove and the locking portion, the sleeve is extended by relatively pulling the insertion tube body in the pulling direction with respect to the exterior tube body, Further, with the engaging portion engaged with the spiral groove, the outer cylinder is relatively rotated with respect to the insertion cylinder, and the sleeve is quickly adjusted by finely adjusting the insufficient length of the sleeve. Can be extended to a predetermined length. At this time, the sliding movement of the insertion cylinder in the insertion direction is limited, so that the sleeve can be prevented from shrinking, and the sleeve can be stretched between the molds.

  Hereinafter, the best mode for carrying out the sleeve for wiring / piping material according to the present invention will be described with reference to the drawings.

  1 to 8 show an embodiment of the present invention. Reference numeral 1 in the figure denotes a concrete construction part, which is composed of, for example, a concrete wall constituting a beam protruding downward from the ceiling. 1a is a through-hole 1a provided in the concrete construction part 1 and through which wiring and piping materials pass. Reference numeral 2 denotes a mold for forming the concrete construction part 1. Reference numeral 3 denotes a sleeve for wiring / piping material, which is arranged between the molds 2 and 2 and embedded in the concrete construction part 1 so as to form the through hole 1a in the concrete construction part 1.

  The sleeve 3 includes a hollow inner tube 4 having a spiral groove 4 a on the outer surface, and a hollow outer tube 5 covering the outer periphery of the inner tube 4. Here, the exterior cylinder 5 includes an elastic piece 5a that can be bent outward. And the elastic piece 5a has the latching claw 5b as a latching part which protrudes inward of the exterior cylinder 5 and engages with the spiral groove 4a of the insertion cylinder 4. Therefore, the locking force with which the locking claw 5b locks the spiral groove 4a is relatively large with respect to the sliding movement in the insertion direction P in which the insertion cylinder 4 is inserted into the outer cylinder 5. In addition, the sliding movement in the insertion direction P is limited, and the locking force is relatively small with respect to the sliding movement in the pulling direction Q for pulling out the inner cylinder 4 from the outer cylinder 5. Thus, an engaging portion between the locking claw 5b and the spiral groove 4a is formed so as to allow sliding movement in the pulling direction Q.

  Specifically, the insertion cylinder 4 is formed in a cylindrical shape, and the spiral groove 4a is provided on almost the entire outer surface thereof. The spiral groove 4a is formed such that the first surface 4b on the drawing direction Q side forming the spiral groove 4a is erected outward, and the second surface on the insertion direction P side forming the spiral groove 4a. The surface 4c is formed so as to be a gentle surface. The inner insertion cylinder 4 is formed with a protrusion 4d for retaining the helical groove 4a on the distal end side to be inserted into the outer cylinder 5. Therefore, the engaging claw 5b that moves in the spiral groove 4a abuts against the projection 4d, so that the inner cylindrical body 4 is prevented from coming off from the outer cylindrical body 5, and the inner cylindrical body 4 is prevented from coming off. It is prevented from coming off the body 5.

  Moreover, the insertion cylinder 4 is provided with the flange part 4e which spreads outward in the edge part on the side away from the exterior cylinder 5 (namely, the said extraction direction Q side). And this flange part 4e is provided with the attachment part 4f to the formwork 2. As shown in FIG. Specifically, four of the attachment portions 4f are equally arranged on the flange portion 4e. The mounting portion 4f is formed in the flange portion 4e so as to project in a hollow shape toward the insertion direction P, and a hole 4g into which the nail 6 is inserted is formed on the top surface.

  The exterior cylinder 5 is formed in a cylindrical shape. The outer cylinder 5 is provided with a pair of elastic pieces 5a on the inlet side where the inner cylinder 4 is inserted. The elastic piece 5a is composed of an inner portion of a cutout 5c in which the peripheral wall of the outer cylinder 5 is cut out in a substantially U-shape, and faces the inlet into which the insertion cylinder 4 is inserted (that is, the inner cylinder 5 is inward). The insertion tube 4 is extended in the pulling direction Q). The locking claw 5b provided on the elastic piece 5a is formed such that the first surface 5d on the locking claw 5b on the pulling direction Q side rises inward, and the locking claw 5b The second surface 5e on the insertion direction P side is formed so as to be a gentle surface. Thus, the insertion direction in which the first surface 5 d where the locking claw 5 b stands up is opposed to the first surface 4 b where the spiral groove 4 a rises in the inner insertion cylinder 4 and the insertion cylinder 4 is inserted into the outer cylinder 5. With respect to the sliding movement to P, the locking force with which the locking claw 5b locks the spiral groove 4a becomes relatively large, and the sliding movement is restricted. The pulling direction Q in which the inclined second surface 5 e of the locking claw 5 b faces the inclined second surface 4 c of the spiral groove 4 a in the inner cylindrical body 4 and pulls out the inner cylindrical body 4 from the outer cylindrical body 5. , The locking force with which the locking claw 5b locks the spiral groove 4a becomes relatively small, and the sliding movement is allowed.

  In addition, the outer cylinder 5 is screwed to the outer surface of the inner cylinder 4 or is screwed into the outer surface of the inner cylinder 4 to prevent relative movement with the inner cylinder 4. Is provided. A pair of the screw mounting portions 5f is provided. The screw mounting portion 5f is formed to project outward in a cylindrical shape on the inlet side of the peripheral wall of the exterior cylinder 5 where the insertion cylinder 4 is inserted, and a hole 5g in the cylinder penetrates therethrough. The screw hole is formed and into which a screw 7 is inserted.

  Next, the function and effect of the sleeve 3 having the above configuration will be described. According to the sleeve 3, the length of the sleeve 3 is adjusted by fitting the inner cylinder 4 and the outer cylinder 5 together and changing the relative position in the longitudinal direction. Here, the inner cylindrical body 4 is provided with a spiral groove 4a on the outer surface, and the outer cylindrical body 5 is provided with an elastic piece 5a, and the elastic piece 5a is provided with the helical groove 4a of the inner cylindrical body 4. The latching claw 5b which engages with is provided. Therefore, the longitudinal direction of the insertion cylinder 4 and the exterior cylinder 5 is relatively rotated by rotating the exterior cylinder 5 along the spiral groove 4a so that the latching claw 5b moves in the spiral groove 4a. The relative position of the sleeve 3 changes, and the length of the sleeve 3 can be adjusted.

  For the sliding movement in the pulling direction Q for pulling out the inner cylinder 4 from the outer cylinder 5, the locking force with which the locking claw 5b locks the spiral groove 4a is relatively small, The sliding movement in the drawing direction Q is allowed. For this reason, the inner cylinder 4 can be slid in the extraction direction Q relative to the outer cylinder 5 by pulling the inner cylinder 4 relative to the outer cylinder 5 in the extraction direction Q. The sleeve 3 can be easily extended.

  Therefore, when the sleeve 3 is disposed between the molds 2 and 2 for forming the concrete construction portion 1, the sleeve 3 is contracted by fitting the inner tube 4 and the outer tube 5 together. (See FIG. 8), inserted between the molds 2 and 2, relatively pulling the insertion cylinder 4 with respect to the exterior cylinder 5 in the pulling direction Q inside the molds 2 and 2, While extending the sleeve 3, the locking claw 5b is engaged with an appropriate position of the spiral groove 4a. At this time, when the length of the sleeve 3 is less than the distance between the molds 2 and 2, the latching claw 5b moves in the spiral groove 4a so as to reach the distance, so that the outer cylinder is relatively moved. The length of the sleeve 3 is finely adjusted by rotating the body 5 with respect to the insertion cylinder 4 (see FIG. 1). In this manner, the inner cylinder 4 is relatively pulled with respect to the outer cylinder 5 in the pulling direction Q, the sleeve 3 is extended, and the locking claw 5b is engaged with the spiral groove 4a. The sleeve 3 is quickly adjusted to a predetermined length between the molds 2 and 2 by rotating the outer cylinder 5 with respect to the inner cylinder 4 and finely adjusting the insufficient length of the sleeve 3. Can be stretched. Therefore, even if a reinforcing bar is arranged between the molds 2 and 2, the sleeve 3 can be inserted avoiding the reinforcing bar and can be quickly arranged at a predetermined position between the molds 2 and 2. Work can be performed efficiently.

  At this time, the locking force with which the locking claw 5b locks the spiral groove 4a is relatively large with respect to the sliding movement in the insertion direction P in which the insertion cylinder 4 is inserted into the outer cylinder 5. In this case, the sliding movement in the insertion direction P is limited, so that the sleeve 3 can be prevented from shrinking. Here, the locking force by the locking claw 5b can be slid in the pulling direction Q with respect to the outer cylinder 5 by hand, and the sleeve 3 can be moved into the mold 2, When it is stretched between the two, it is desirable that the inner cylinder 4 has a locking force that does not slide in the insertion direction P with respect to the outer cylinder 5.

  Further, the screw 7 is attached to the screw mounting portion 5 f of the outer cylinder 5, and the outer surface of the insertion cylinder 4 is pressed with the screw 7, or the screw 7 is screwed into the outer surface of the insertion cylinder 4. Thus, if the relative movement between the outer cylinder 5 and the inner cylinder 4 is prevented, the sleeve 3 can be reliably maintained at a predetermined length. Here, in order to limit the sliding movement of the insertion cylinder 4 in the insertion direction P with respect to the outer cylinder 5, that is, to limit the sleeve 3 from contracting, the locking claw 5b engages the spiral groove 4a. If the locking force to be stopped can sufficiently withstand the concrete placement, or the sleeve 3 can be extended and stretched between the two molds 2 and 2 by the locking force, the screw 7 may act only to prevent relative screw rotation between the insertion cylinder 4 and the exterior cylinder 5 due to the engagement of the spiral groove 4a and the locking claw 5b. Further, the prevention of the screw rotation and the prevention of the sliding movement of the insertion cylinder 4 with respect to the outer cylinder 5 in the insertion direction P, that is, the prevention in the direction in which the sleeve 3 is contracted can be achieved without using the screw 7. In this prevention, it may be bonded with an adhesive, or a tape is wound around the outer side of the locking claw 5b so as to restrict the outward movement of the locking claw 5b, or the insertion tube 4 and the exterior. The cylindrical body 5 may be fixed by being wound with a tape, and the blocking means is not limited.

  Further, after the sleeve 3 is disposed at a predetermined position between the molds 2 and 2, the nail 6 is inserted into the hole 4 g of the attachment portion 4 f provided in the flange portion 4 e of the insertion cylinder 4, and the nail By driving 6 into the mold 2, it is possible to reliably fix the inner cylindrical body 4 and consequently the sleeve 3 to the mold 2 (see FIG. 2).

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the outer cylinder 5 is provided with a screw attachment portion 5f, but the screw attachment portion 5f may be omitted.

  Moreover, although the flange part 4e is provided in the insertion cylinder 4, this flange part 4e does not need to be provided. Regardless of the presence or absence of the flange portion 4e of the insertion cylinder 4, the exterior cylinder 5 may include a flange portion that extends outward at the end on the side away from the insertion cylinder 4.

  Further, as shown in FIG. 9, the outer cylinder 5 is connected to a cylinder 8 into which the insertion cylinder 4 can be inserted, on the side opposite to the inlet side where the insertion cylinder 4 is inserted. The connection port 5h may be provided. In the illustrated embodiment, the outer cylinder 5 is formed with a short length, and the connecting port 5h having a large diameter is provided on the side opposite to the inlet side into which the inner cylinder 4 is inserted. Is provided. And the said cylinder 8 is fitted and connected to this connection port 5h. Here, although the cylinder 8 consists of smooth pipes, such as a vinyl chloride pipe | tube (vinyl chloride resin pipe), for example, it is not limited to this smooth pipe. Further, the cylindrical body 8 may be fitted to the outer peripheral side without fitting to the inner peripheral side of the connection port 5h. According to the exterior cylinder 5, the length including the cylinder 8 can be increased by connecting the cylinder 8 to the connection port 5 h of the exterior cylinder 5. Therefore, the single length of the exterior cylinder 5 can be set short, and if the cylinder 8 obtained by cutting the long tubular material is used, it is possible to easily cope with the through holes 1a having different lengths.

  Further, the elastic piece 5a provided with the locking claws 5b is not formed integrally with the exterior cylinder 5 but the exterior cylinder 5 is separated from the exterior cylinder body and the exterior cylinder body. For example, the elastic piece may be assembled so as to hold the exterior cylinder body.

It is a longitudinal cross-sectional view of one embodiment of this invention. Similarly, it is a plan view. Similarly, it is a perspective view of an insertion cylinder. Similarly, it is a longitudinal cross-sectional view of an insertion cylinder. Similarly, it is a perspective view of an exterior cylinder. Similarly, it is a longitudinal cross-sectional view of an exterior cylinder. Similarly, it is a cross-sectional view of an exterior cylinder. Similarly, it is a longitudinal cross-sectional view combining an insertion cylinder and an exterior cylinder. It is the longitudinal cross-sectional view which combined the exterior cylinder and the cylinder of other embodiment of this invention. It is a front view which shows the conventional sleeve. It is principal part sectional drawing which shows the other conventional sleeve.

DESCRIPTION OF SYMBOLS 1 Concrete construction part 1a Through-hole 3 Sleeve 4 Insertion cylinder 4a Spiral groove 4e Flange part 5 Exterior cylinder 5a Elastic piece 5b Locking claw (locking part)
5f Screw mounting part 5h Connection port 7 Screw 8 Tube P Insertion direction Q Pull-out direction

Claims (4)

In order to form a through-hole through which the wiring / piping material passes in the concrete construction part, it is placed between the molds for forming the concrete construction part and embedded in the concrete construction part. A sleeve,
A hollow inner cylindrical body having a spiral groove on the outer surface, and a hollow outer cylindrical body covering the outer periphery of the inner cylindrical body,
The exterior cylinder includes an elastic piece that can be bent outward, and the elastic piece has an engaging portion that protrudes inward of the exterior cylinder and engages with the spiral groove.
For sliding movement in the insertion direction in which the inner cylindrical body is inserted into the outer cylindrical body, the locking force with which the locking portion locks the spiral groove is relatively large, In addition to restricting the sliding movement in the insertion direction, the locking force is relatively small for the sliding movement in the pulling direction for pulling out the inner cylindrical body from the exterior cylindrical body, and the pulling out An engagement portion between the locking portion and the spiral groove is formed to allow sliding movement in the direction,
In a state where the inner cylindrical body and the outer cylindrical body are fitted and contracted, the inner cylindrical body is inserted between the molds, and the inner cylindrical body is relatively inserted into the outer cylindrical body between the molds. On the other hand, it is extended by pulling in the pulling direction, and the outer cylinder is relatively rotated with respect to the insertion cylinder in a state where the locking portion is engaged with the spiral groove. Thus, the insufficient length is finely adjusted , and the inner cylinder is stretched between the molds without sliding with respect to the outer cylinder by the locking force in the insertion direction. A sleeve for wiring and piping materials.   In order to prevent relative movement with the insertion cylinder, the exterior cylinder includes a screw attachment portion to which a screw is attached, which presses the outer surface of the insertion cylinder or is screwed into the outer surface. The wiring / piping material sleeve according to claim 1, characterized in that it is a feature.   The exterior cylinder includes a connection port to which a cylinder capable of inserting the insertion cylinder is connected to a side opposite to an inlet side into which the insertion cylinder is inserted. The sleeve for wiring and piping materials according to claim 1 or 2.   The wiring / piping according to any one of claims 1 to 3, wherein the insertion cylinder includes a flange portion that extends outward at an end portion on a side away from the exterior cylinder. Sleeve for material.

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