JP4750622B2 - Protective equipment - Google Patents

Description

  The present invention relates to the connection of a connection body that is embedded in a peripheral wall of a concrete underground box (also referred to as a “hand hole”) and includes a bell mouth portion and a connection portion to which a pipe or a pipe joint is connected. The present invention relates to a protective device for protecting a part.

  FIG. 14 shows an example of an underground box using a protector as a background art of the present invention. (A) is a sectional view showing the entire underground box, and (b) is a protector. It is a principal part expanded sectional view of the part which installed. This protective device is described in Patent Document 1.

  The underground burying box 80 shown in FIG. 14 is made of concrete, a lid 72 can be opened and closed, and a protective device 60 is detachably attached to a plurality of connecting bodies 70 embedded in the side wall 71 thereof.

  The connection body 70 is a connection for connecting a bell mouth portion 61 which is the inside of the side wall 71 and an outside and wiring or the like (referred to as wiring and piping) to be branched and merged in the underground box 80. Part 62.

  The protective device 60 closes the opening end of the connecting portion 62 to prevent dust and the like from entering the connecting portion 62 and through the connecting portion 62 into the underground buried box 80. Yes.

  However, the protective device 60 is installed on the connection body 70 after being simply embedded in the side wall 71 of the underground burying box 80 and plays a limited role of preventing dust intrusion thereafter.

Further, since the protective device 60 is of a very short size and closes only the opening end of the connecting portion 62, a portion where the other party connected to the connecting portion 62 is fitted becomes dirty or dust is collected. Adhesion is not completely prevented, and there is a possibility that problems may arise in adhesion to the other party and maintenance of watertightness when sealing.

Patent Document 2 and Patent Document 3 also have descriptions of underground underground pipes equipped with connecting bodies, but these do not describe anything similar to the protective equipment to be provided by the present invention. There was no mention of having multiple roles.
Japanese Patent Laid-Open No. 2001-359111 (FIGS. 1 and 2) Japanese Patent Laid-Open No. 9-221768 (FIG. 2) Japanese Utility Model Laid-Open No. 2-10764 (FIG. 5)

  The present invention is intended to solve the above-described problem. In embedding the connection body in the underground pipe, not only the connection portion after the embedding is protected, but also the positioning of the connection body and the embedding in the underground pipe. It aims at providing the multipurpose protective equipment which can be used also for.

The protector according to claim 1 is embedded in a peripheral wall of a concrete underground box, and protects the connection portion of a connection body including a bell mouth portion and a connection portion to which a pipe or a pipe joint is connected. And a fitting part that closely fits the entire inner surface of the connection part and closes the opening side of the connection part, and is removable from the formwork for forming the peripheral wall A fixing portion for penetrating a nail or a hexagon bolt to fix the protective device, and the connection portion is fitted to the fitting portion in a state of being fixed to the desired position of the mold by the fixing portion. Thus, the connection body can be positioned and fixed with respect to the mold.

  The protector according to claim 2 is dependent on claim 1, and the protector has a cylindrical shape in which the fitting part on the outer peripheral side and the fixed part on the center side are connected by a reinforcing bar, The opposite side of the mold frame is closed by a lid.

  According to a third aspect of the present invention, the protector is dependent on the first or second aspect, and the fixing portion is a fixing hole penetrating from the non-form frame side of the protector to the mold frame side.

  The protective device according to claim 4 is dependent on claim 3, wherein the hexagonal bolt is inserted into the fixing hole, and the hexagonal portion of the hexagonal bolt is provided on the side opposite to the fixed hole of the fixing hole. A hexagonal recess is provided.

  The protective device according to claim 5 is dependent on any one of claims 1 to 4, and the fixing portion penetrates a fixing means for fixing the protective device to a formwork with which the protective device is to abut. It is characterized by being.

  The protective device according to claim 6 is dependent on any one of claims 1 to 5, and includes a flange portion that contacts the end surface of the connection portion and is interposed between the end surface of the connection portion and the formwork. To do.

  The protector according to claim 7 is dependent on claim 6, and the flange length of the flange is such that a pipe or a pipe joint connected to the connecting portion when the protector is embedded in the peripheral wall in a state of being close to each other. It is characterized by a length that does not interfere with each other.

  A protector according to an eighth aspect is dependent on any one of the fourth to seventh aspects, and includes a hexagon bolt that is removably inserted into the fixing hole.

According to the protector according to claim 1, the connecting portion of the connection body, which is embedded in the peripheral wall of the concrete underground box and includes a bell mouth portion and a connecting portion to which a pipe or a pipe joint is connected, is provided. A protective device for protection, which is fitted to the entire inner circumference of the connecting portion and closes the opening side of the connecting portion, and is removed from the formwork for forming the peripheral wall A fixing part for penetrating a nail or a hexagon bolt to fix the protective device as possible, and the connection part is fitted to the fitting part in a state of being fixed by the fixing part at a desired position of the mold. As a result, the connection body can be positioned and fixed with respect to the formwork. It can also be used for embedding in a box, achieving multipurpose It can be.

  According to the protector according to claim 2, in addition to the effect of claim 1, the protector has a cylindrical shape in which the fitting portion on the outer peripheral side and the fixed portion on the center side are connected by a reinforcing bar. Since the opposite side of the mold frame is closed by the lid, it has a solid cylindrical structure that is closed by the lid and provided with reinforcing bars. Increase the resistance to.

  According to the protector of Claim 3, in addition to the effect of Claim 1 or 2, it can be detachably fixed to the formwork using the fixing hole, and the above effect can be surely exhibited.

  According to the protector according to the fourth aspect, in addition to the effect of the third aspect, when the hexagon bolt is used for fixing to the mold, no rotation restricting means is required on the protector side, and fixing and tightening can be easily performed.

  According to the protective device of the fifth aspect, in addition to the effect of any one of the first to fourth aspects, it is possible to fix to the formwork by a fixing means such as a nail in addition to the hexagon bolts. Selection becomes possible.

  According to the protective device of the sixth aspect, in addition to the effect of any one of the first to fifth aspects, since the flange portion that contacts the end surface of the connection portion and is interposed between the end surface of the connection portion and the formwork is provided. Even if the connection body is slightly inclined and embedded in the peripheral wall of the underground burial box, a pipe joint or the like connected to the connection portion can be connected in a state perpendicular to the peripheral wall.

  According to the protector according to claim 7, in addition to the effect of claim 6, the flange length of the flange is such that the pipe connected to the connection part when the protector is embedded in the peripheral wall in a state close to each other, or Since the length of the pipe joint is such that it does not interfere with each other, when fixing the protector adjacent to the formwork, the flange portion is simply positioned without measuring the distance between them. It is possible to prevent interference without interfering with each other when a pipe joint or the like is installed on the connection body after that, by simply fixing it so as to come into contact.

  According to the protective device of the eighth aspect, in addition to the effect of any one of the fourth to seventh aspects, since the hexagonal bolt that is detachably inserted into the fixing hole is provided, it is necessary to prepare the hexagonal bolt separately at the site. There is no convenience.

  Hereinafter, embodiments (examples) of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example of the protective equipment of the present invention, where (a) is a front view thereof, (b) is a rear view thereof, (c) is a cross-sectional view taken along line AA of (a), and (d) is (a) BB sectional drawing of (), (e) is the external appearance perspective view.

  The protective device 10 is embedded in a peripheral wall 21 (see FIG. 5B) of a concrete underground box 30 (see FIG. 5B, also referred to as “hand hole”), and a bell mouth portion. 11 and a connecting portion 12 of a connecting body 20 (see FIG. 2) including a connecting portion 12 to which a pipe or a pipe joint is connected.

  The feature is that the fitting portion 1 that closely fits the entire inner circumference of the connecting portion 12 and closes the opening side of the connecting portion 12 and the formwork WF for forming the peripheral wall 21 (see FIG. 3A). .)) And a fixing portion 2 for fixing the protective device removably.

  In addition to the above configuration, the protective device 10 has a cylindrical shape in which a fitting portion 1 on the outer peripheral side and a fixing portion 2 on the center side are connected by a reinforcing bar 3, and the opposite side of the mold frame is a lid portion It is closed at 5.

  Furthermore, the protector 10 is provided with a flange portion 4 (see FIG. 3C) that abuts on the end surface of the connection portion 12 and is interposed between the end surface of the connection portion 12 and the formwork WF.

  More specifically, the fixing part 2 includes a fixing hole 2a penetrating from the side opposite to the form frame of the protective device 10 into which the shaft part of the hexagon bolt 6 (see FIG. 3A) is inserted. The fixing hole 2a is provided on the side opposite to the mold frame, and includes a hexagonal recess 2b corresponding to the hexagonal portion of the hexagonal bolt 6.

  Further, in this protector 10, in addition to the above-described fixing part 2 (fixing hole 2a and hexagonal recess 2b), a nail which is a fixing means is driven from the lid part 5 to the mold WF side, so that the protector 10 is molded. 2 A of fixing means penetration parts for fixing to the frame WF are also provided.

  The fixing means penetrating portion 2A is a through hole having a hole diameter that allows a nail used for attachment to the formwork WF to be driven without resistance, and the protector 10 is not damaged even when the nail is driven.

  Further, the fixing means penetrating portion 2A does not penetrate completely, and a closing portion 2c that can be easily broken by driving a nail is formed in a part thereof. As will be described later, the closing portion 2c prevents the inside of the underground burying box 30 with the protector 10 attached from being contaminated with dust or the like entering from the protector 10.

  2A and 2B show an example of a connection body in which the protector of FIG. 1 is used. FIG. 2A is a front view thereof, FIG. 2B is a sectional view thereof, and FIG. 2C is an external perspective view thereof.

  As described above, the connection body 20 is embedded in the peripheral wall 21 (see FIG. 5B) of the concrete underground box 30 (see FIG. 5B), and has a tubular shape as a whole. A bell mouth portion 11 and a connection portion 12 to which a pipe or a pipe joint is connected are provided.

  The bell mouth portion 11 is opened to the inside of the underground buried box 30 to guide the wiring and the like that has passed through the connecting body 20, and its inner diameter is increased as it becomes the opening side. In the outer shape, axial ribs 11a for reinforcement are provided so as to equally divide the circumference.

  A flange portion 11 b is provided on the opening side end surface of the bell mouth portion 11. This flange part 11b is for preventing the wiring etc. which are introduce | transduced into the underground burial box 30 from touching the wall edge of the underground burial box 30 which is concrete, and being contaminated.

  The connecting portion 12 has a straight cylindrical shape in accordance with a pipe or a pipe joint fitted into the inner diameter, and the inner diameter is uniform. A ring-shaped protrusion 12c is appropriately provided on the outer periphery. This protrusion 12c is to restrict the connection body 20 from moving in the axial direction when the placed concrete is solidified.

  In addition, although the rib 11a on the outer periphery of the bell mouth portion 11 has the role of preventing the connection body 12 from moving with respect to the solidified concrete, the connection body 12 rotates relative to the concrete in this case. It is something to avoid.

  The opening end of the connecting portion 12 is a flange portion 12a, and the inner edge thereof is a slope-shaped guide portion 12b. A guide is provided so that a pipe or a pipe fitting fitted into the inner diameter of the connecting portion 12 can be easily inserted. To do.

  FIG. 3 illustrates a method of using the protective device of FIG. 1 in combination with the connection body of FIG. 2, wherein (a) is a cross-sectional view of the state in which the protective device is attached to the mold, and (b) is (a) ) Seen from the protective equipment side, (c) is a cross-sectional view of a state in which a connecting body is further installed in (a), and FIG. 4 explains how to use the protective equipment following FIG. a) is a cross-sectional view of a state in which a formwork is installed on the opposite side of the connection body, and (b) is a cross-sectional view of a state in which concrete is placed in (a).

  FIG. 5 explains the method of using the protective equipment following FIG. 4, (a) is a sectional view with the formwork removed after placing concrete, (b) is the hexagon bolt removed from (a). FIG. 6 is a cross-sectional view of a state where the pipe joint is inserted into the connection body of the underground burial box. FIG. ) Is a diagram of a state in which the corrugated tube is connected thereafter.

  A method of using the protective equipment of the present invention will be described below with reference to FIGS.

  FIG. 3A: First, a fixing hole is opened at a position where the connecting body 20 of one mold WF forming the peripheral wall 21 of the underground burying box 30 is to be embedded, and a hexagonal bolt 6 as a fixing means is used by using this. The protector 10 is fixed to the mold WF.

  At this time, the head of the hexagon bolt 6 is fitted into the hexagonal recess 2 b of the fixing portion 2, and the hexagon bolt 6 does not rotate relative to the protector 10. In the state where 4 is in contact with the mold WF, when the hexagon nut 6a threadedly engaged with the tip of the threaded portion of the hexagon bolt 6 is rotated and tightened, tightening is performed without particularly restricting the rotation of the protector 10 side. Workability is good.

  Alternatively, the head of the hexagon bolt 6 may be brought to the mold WF side, and the hexagon nut 6a may be fitted into the hexagon recess 2b of the protector 10 and tightened.

  Further, from the protector 10 side, the protector 10 is fixed to the formwork WF by using a nail which is a fix means, without using the hexagon bolt 6. Also good.

  In other words, the protective device 10 can be selectively used in accordance with the situation at the site from fixing with the hexagon bolt 6 using the fixing portion 2 and fixing with a nail using the fixing portion (fixing means penetration portion) 2A. Since it can be used, the applicability is high.

  FIG. 3B: Next, the connection part 12 of the connection body 20 is fitted into the fitting part 1 of the fixed protective device 10. At this time, the fitting portion 1 and the connecting portion 12 are fitted to each other within a range of elastic deformation of each material so that the fitting portions can be fitted with each other without looseness. However, the connection body 20 does not fall off.

  FIG. 4A: Next, the opposite formwork WF is installed so as to sandwich the connection body 20 therebetween. At this time, the total length of the connection body 20 or the length obtained by adding the thickness of the flange portion 4 of the protective device 10 to the total length, the distance between the molds WF, and thus the peripheral wall formed by these molds WF The thickness of 21 is determined.

  FIG. 4B: Thereafter, concrete K is placed between the molds WF. In the figure, the concrete K that has been placed is indicated by two adjacent oblique lines.

  At this time, the protective device 10 is firmly fixed to the mold WF by the hexagon bolts 6 inserted into the fixing portion 2, and the connection body 20 is firmly held by the fitting portion 1. The position and posture of the connecting body 20 can be maintained by overcoming the placement.

  The protective device 10 has a cylindrical shape in which the fitting portion 1 and the fixing portion 2 are connected by a reinforcing bar 3, and has a sturdy structure in which the opposite side of the mold frame is closed by a lid portion 5. Therefore, the connection body 20 is held more firmly and the resistance to concrete placement is increased.

  In this protector 10, the lid portion 5 is provided only on the side opposite to the mold frame, and the mold frame WF side is in an open state where the reinforcing bar 3 and the like can be seen. Therefore, when removing the protector 10, it is convenient because the fingertip can be easily inserted and removed from the empty space of the reinforcing bar 3 or the like.

  Furthermore, since the fitting portion 1 of the protective device 10 is fitted to the connecting portion 12 over a length of one third or more of the entire length of the connecting body 20, it can overcome the concrete placement. In addition, the connection body 20 is held more firmly, and the resistance to concrete placement is increased.

Moreover, since the fitting part 1 of the protective device 10 is fitted over the inner periphery of the connection part 12 of the connection body 20 over half of its entire length, dust inside and outside may adhere to this part. This can be prevented and does not adversely affect the adhesive bonding of the pipe joint PJ, which will be described later, and the maintenance of watertightness by the seal.

  FIG. 5A: When the concrete placement is completed and the concrete is solidified, the hexagon nut 6a tightening the hexagon bolt 6 is removed and the formwork WF is removed, and the state shown in this figure is obtained.

  FIG. 5B: From the state of FIG. 5A, when the hexagon bolt 6 is pushed from the outside (right side in the figure) to the inside (left side in the figure) of the peripheral wall 21 of the underground buried box 30, the hexagon bolt 6 is This is the state shown in this figure.

  In this state, the underground burial box 30 provided with the connection body 20 appropriately protected on the peripheral wall 21 by the protective device 10 so that dust does not enter from the opening side can be used for underground burial. It is a state of a finished product, and in this state, it is transported, handled, sold, and used. Meanwhile, the opening side of the connection body 20 is protected by the protective device 10, and dust can be prevented from entering from the outside.

  In addition, as described with reference to FIGS. 3 and 4, the protective device 10 has a plurality of roles of positioning, fixing, and maintaining the position and orientation of the connection body 20 during concrete placement, to the formwork WF. It is understood that it is multipurpose.

  FIG. 6A shows an example of how to use the underground box 30 thus prepared. In this example, the protective device 10 of the connection body 20 embedded in the peripheral wall 21 is removed, and an adhesive is applied to the inner periphery of the connection portion 12 of the connection body 20 and the outer periphery of the connection portion Pa of the pipe joint PJ to be inserted therein. Then, the connection portion Pa of the pipe joint PJ is fitted into the connection portion 12 of the connection body 20.

  Thereafter, the corrugated pipe can be connected to the pipe connecting portion Pb of the pipe joint PJ (this is not clear in the drawing, but a square corrugated pipe can be connected).

  As can be seen from the comparison between FIG. 6A and FIG. 5B, after removing the protective device 10 before connecting the pipe joint PJ, the peripheral wall 21 of the underground box 30 A step D corresponding to the thickness of the flange portion 4 of the removed protective device 10 is formed between the surface of the connection portion 12 and the flange portion 12a that is outside the connection body 20.

  The flange portion 4 of the protective device 10 that generates such a step D is very thin, but even if there is a slight inclination in the embedding of the connection body 20 in the peripheral wall 21, the outer side of the connection body 20. This is so that the surface of the flange portion 12a, which is the surface, does not protrude from the surface of the peripheral wall 21, so that there is no hindrance to the installation of a pipe joint or the like that should be installed at a right angle with respect to the surface of the peripheral wall 21. .

  FIG. 6 (b): Another method of using the underground buried box 30 is a circular corrugated pipe PW that fits in the connection portion 12 of the connection body 20 installed on the peripheral wall 21 without any gap as shown in this figure. Is to connect.

  Thus, after the underground box 30 is installed in the ground and the corrugated pipes PW and pipe joints PJ are connected to the respective connecting bodies 20, the waves connected via the corrugated pipes and pipe joints are connected. Necessary wiring and the like are branched and merged in the underground box 30 through the attachment tube, and the function as the underground box 30 is exhibited.

  At this time, the protector 10 according to the present invention provides the connection body 20 in addition to positioning, fixing, and maintaining the position and orientation of the connection body 20 during concrete placement for manufacturing the underground box 30. Thus, it is possible to provide the underground buried box 30 in which the position and direction of the connection body 20 are accurately maintained at a lower cost.

  The protective device 10 of the present invention may be a set of hexagon bolts 6 as fixing means, and nuts 6a for the hexagon bolts 6 as necessary. In that case, separate fixing means are prepared. It is convenient because it is not necessary.

  FIG. 7 shows another example of the protector of the present invention, where (a) is a front view thereof and (b) is an external perspective view thereof.

  This protective device 10A is different from the protective device 10 of FIG. 1 in that the flange portion 4A is wider and the outer shape is a quadrangle.

  More specifically, the flange portion 4A has a brim length that is positioned on the peripheral wall 21 of the underground burying box 30 by the protector 10A, and the connection body 20 should be buried in a state of being close to each other. The length of the pipe or the pipe joint connected to the connection portion 12 is such that it does not interfere with each other.

  The effect of 10 A of protectors provided with such a flange part 4A is demonstrated using FIG. FIG. 8 explains the method of using the protective device of FIG. 7, (a) is a sectional view of the protective device installed in the underground burial box, and (b) is (a) from the protective device side. (C) is a cross-sectional view of a state where a pipe joint is installed in (a), and (d) is a view of (c) seen from the pipe joint side.

  When this protector 10A is used, it is fixed to the mold WF so that the flange portion 4A is abutted next to each other. In this example, the flange portion 4A is fixed to the mold WF so that the outer edge ends of the flange portions 4A are adjacent to each other.

  4 and 5, when the connecting body 20 is attached and the concrete is placed, the peripheral wall 21A (underground box 30A) has a cross section as shown in FIG. As shown in (b), the flange portions 4A of the upper and lower protective devices 10A are in contact with each other.

  Thereafter, when the protector 10A is removed and the pipe joints PJ are respectively fitted, the states shown in FIGS. 8B and 8C are obtained.

  In this state, the pipe joint PJ having a size slightly larger than the connection body 20 can be installed through an appropriate gap so as not to interfere with each other, that is, not to interfere with each other.

  Thus, according to the protector 10A, when fixing adjacent to the formwork WF, the flange portion 4A is simply fixed so as to contact without positioning the mutual distance particularly by measuring the distance. Thereafter, when a pipe joint PJ or the like is installed in the connection body 20, it is possible to prevent interference so as not to interfere with each other.

  Note that the shape of the flange portion 4A is preferably matched to the shape of the pipe joint PJ to be connected later. In this example, since the shape of the pipe joint PJ is a quadrangle, the shape of the flange portion 4A is also a square. However, when the shape of the pipe joint is a round shape or other high shape, it is better to match it.

  Further, in particular, as in this example, in the case where the shape of the flange portion is the quadrangular protective device 10A, the stacking property is good at the time of construction at the site, and it can be easily arranged vertically and horizontally according to the request at the site, and the stacked state Can be formed.

  FIG. 9 shows an example of a connection block using the protector of FIG. 1, wherein (a) is a front view thereof, (b) is a sectional view thereof, (c) is an external perspective view thereof, (d), (E) is a front view which shows the other example of a connection block.

  The connection blocks 40, 40A, 40B shown in FIG. 9 are prepared by preparing several types of protective equipment 10 and connection body 20 embedded in concrete K blocks in advance, and combining them as necessary. Thus, it is used by being built in the underground construction box 30B having a large opening.

  FIGS. 9A, 9B, and 9C are a minimum unit connection block 40 in which a pair of protective equipment 10 and a connection body 20 are embedded, and the outer dimensions thereof are described in the second embodiment. Thus, it is set according to the external dimensions of the pipe or pipe joint to be connected to this connection block.

  The type of connection block is determined according to what is required at the site construction, but from the single unit (40) of the minimum unit to the double unit, the triple unit, four units shown in FIG. 9 (d) A set (40A), a six-piece set (40B) shown in FIG.

  A method of using this connection block will be described with reference to FIG. FIG. 10 illustrates a method of using the connection block of FIG. 9, (a) is a cross-sectional view of a state in which the connection block is installed in the underground burial box, and (b) is a diagram of (a) showing View from outside, (c) is a cross-sectional view of a state where a pipe joint and corrugated pipe are connected to (a) and mortar is placed, and (d) is a view of (c) seen from the corrugated pipe. It is.

  10A and 10C are cross-sectional views of the connection block 40B.

  First, as shown in FIGS. 10 (a) and 10 (b), in a large opening of the underground burial box 30B, a row of three small connection blocks 40C and a set of four connection blocks 40B are arranged, The inner side is regulated by the holding plate WP, and mortar M is driven into the gap with the opening.

  When the mortar is solidified, pipe joints PJ and corrugated pipes PW ′ are connected to the respective connecting portions, and the vicinity of the connecting portions is fixed with mortar, resulting in the states shown in FIGS.

  As described above, the connection blocks 40 to 40C are used when a necessary size and number of connection bodies 20 are required in accordance with the requirements at the site.

  FIG. 11 shows another example of the protective device of the present invention, in which (a) is a front view thereof, (b) is a side view thereof, (c) is a bottom view thereof, and (d) is an AA of (a). Sectional drawing and (e) are the external appearance perspective views.

  This protective device 10B is smaller than the cylindrical protective device 10 of FIG. 1, and is smaller in size and protects the inner peripheral portion of the rectangular connecting portion 12A of the connecting body 20A of FIG. Has a square tube shape.

  The protector 10B includes fitting portions 1A and 1B, fixing portions 2 and 2A, a reinforcing bar 3A, a flange portion 4A, and a lid portion 5A that perform the same functions as the respective portions of the protector 10 of FIG. However, as a whole, each portion corresponds to a square tube shape.

  The fixing portions 2 and 2A are common to the fixing portions 2 and 2A of the protector 10 in FIG.

  The fitting parts 1A and 1B are configured with a front fitting part 1A having a larger outer dimension and a rear fitting part 1B having a smaller outer dimension following the flange part 4A side. . The connecting portion between the front fitting portion 1A and the back fitting portion 1B has a step due to different outer dimensions.

  The front fitting portion 1A does not extend over all sides of the quadrangle, and one side is a continuous portion with the same outer dimensions as the back fitting portion 1B.

  On the flange part 4A side of the front fitting part 1A, a fitting convex part 7 is provided for two opposing sides.

  Such a configuration of the front fitting portion 1A, the back fitting portion 1B, and the fitting convex portion 7 corresponds to the configuration of the connecting portion 12A of the connecting body 20A in FIG.

  FIG. 12 shows another example of the connection body in which the protective equipment of FIG. 11 is used, (a) is a front view thereof, (b) is a lateral view thereof, (c) is a side view thereof, and (d). (B9 is a BB cross-sectional view of (b9), and (e) is an external perspective view thereof.

  Compared to the connection body 20 of FIG. 2, the connection body 20A is the same in that the bell mouth portion 11A and the connection portion 12A are embedded in the peripheral wall of the underground burial box, but is smaller in size. 12A is different in that the pipe joint PJ of FIG. 6 is integrated.

  The bell mouth portion 11A has a rectangular tube shape as a whole, and has an outer circular flange portion 11c on the inner surface side of the underground box and a ring on the outer periphery of the connection portion 11 of the connection body 20 in FIG. A projection 11d that exhibits the same function as the projection 12c is provided.

  The connecting portion 12A is also a rectangular tube as a whole, and is connected to the smaller bell mouth portion 11A by an intermediate wall 13 that fills the dimensional difference between the two, and is connected to the intermediate wall 13 by this connecting body 20A. A passage window 13a is provided for allowing the wiring to be passed through.

  The inner peripheral side of the connecting portion 12A is a corrugated tube fitted therein and a retainer (not related to the gist of the present invention, and detailed description is omitted) for retaining the corrugated tube by one touch. A front fitting hole 12d and a back fitting hole 12e are provided.

  In addition, the connection portion 12A is provided with an engagement hole 14, a fitting recess 15, and a locking screw hole portion 16 for the above-mentioned retaining engagement. Also for these, detailed explanation is omitted similarly.

  How to use the protector 10B and the connection body 20A configured as described above will be described with reference to FIG. 13 is a perspective view for explaining a method of using the protective device of FIG. 11 in combination with the connector of FIG.

  Also in this case, first, the protective device 10B is fixed to the formwork WF using the fixing portion 2 or 2A, and the connecting body 20A is connected to the front fitting portion 1A and the back fitting portion 1B of the fixed protective device 10B. The front fitting hole 12d and the back fitting hole 12e of the connecting portion 12A are fixed so as to be fitted, and concrete is placed.

  At this time, it is preferable to close the engaging hole 14 and the locking screw hole 16 which are the opening of the connecting body 20A with an adhesive tape or the like.

  After that, when the placement is completed, the frame WF is removed, and the underground box can be used. At this time, the protector 10 </ b> B exhibits the same function and effect as the protector 10.

  In addition, although the Example of the protector of this invention was demonstrated above, as summarized below, this Example does not limit the scope of the invention of the protector of this invention to the said specific example.

<Content of the invention included in the above embodiment>
It will be understood that the embodiment of the present invention described above includes the following inventive concept (including its effects).

1. Protection for protecting the connection portion 12 of the connection body 20 that is embedded in the peripheral wall 21 of the concrete underground buried box 30 and includes the bell mouth portion 11 and the connection portion 12 to which a pipe or a pipe joint is connected. Ingredient 10,
The protector 10 is detachably fixed to the fitting portion 1 that closely fits the entire inner surface of the connecting portion 12 and closes the opening side of the connecting portion 12 and the formwork WF for forming the peripheral wall 21. A protective device 10 comprising: a fixing portion 2 for performing the operation.

  According to such a protective device 10, when embedding the connection body 12 in the underground pipe 30, not only the connection portion 12 is protected after being embedded, but also the positioning of the connection body 20 and the embedding in the underground pipe 30. Can also be used to achieve multiple purposes.

  2. A protector having a cylindrical shape in which a fitting portion 1 on the outer peripheral side and a fixing portion 2 on the center side are connected by a reinforcing bar 3, and the opposite side of the mold frame is closed by a lid portion 5. 10.

  According to this protective device 10, since it has a solid cylindrical structure that is closed by the lid portion 5 and provided with the reinforcing bar 3, the connection body 20 is held more firmly, and the resistance to concrete placement is increased. increase.

  3 The protector 10 is characterized in that the fixing portion 2 is a fixing hole 2 penetrating from the side opposite to the formwork side of the protector to the formwork side.

  According to this protector 10, it is possible to detachably fix the mold WF using the fixing hole 2, and the above-described effects can be reliably exhibited.

  4). A hexagonal bolt 6 is inserted into the fixing hole 2, and a hexagonal recess 2 b corresponding to the hexagonal portion of the hexagonal bolt 6 is provided on the opposite side of the fixing hole 2. Protective equipment 10.

  When the protective device 10 is fixed to the formwork WF using the hexagon bolt 6, the rotation restricting means is not required on the protective device 10 side, and fixing and tightening are easy.

  5. The fixing part 2A is a fixing means penetrating part 2A that allows a fixing means (nail) for fixing the protecting tool 10 to pass through a mold WF to which the protecting tool 10 should come into contact.

  According to this protective device 10, fixing means such as a nail other than the hexagon bolt can be fixed to the mold WF, and the fixing means can be selected on site.

  6). A protective device (10) comprising a flange portion (4) that contacts the end surface of the connecting portion (12) and is interposed between the end surface of the connecting portion (12) and the formwork (WF).

  According to this protective device 10, even if the connection body 20 is slightly inclined and embedded in the peripheral wall 21 of the underground burying box 30, the pipe joint connected to the connection portion 12 is connected in a state perpendicular to the peripheral wall 21. can do.

  7). The flange length of the flange portion 4A is such that the pipe or the pipe joint connected to the connection portion does not interfere with each other when the protective equipment is embedded in the peripheral wall in a state close to each other. Protective equipment 10A.

  According to this protective device 10A, when fixing adjacent to the formwork WF, it is simply fixed so that the flange portion 4A abuts without positioning the mutual distance particularly by measuring the distance. When the pipe joint PJ or the like is installed in the connection body 20, it is possible to prevent interference so as not to disturb each other.

  8). A protective device 10, 10 </ b> A comprising a hexagonal bolt 6 that is removably inserted into the fixing hole 2.

  According to the protectors 10, 10A, the hexagon bolt 6 as a fixing means is attached, which is convenient.

  The protective device of the present invention has a versatility that can be used not only for protecting the connection part after embedding, but also for positioning the connection body and embedding in the underground buried pipe when embedding the connected body in the underground buried pipe. It can be used in required industrial fields.

An example of the protector of this invention is shown, (a) is the front view, (b) is the back view, (c) is AA sectional view of (a), (d) is BB section of (a). Figure, (e) is an external perspective view 1 shows an example of a connection body in which the protector of FIG. 1 is used, in which (a) is a front view thereof, (b) is a cross-sectional view thereof, and (c) is an external perspective view thereof. FIG. 3 is a diagram illustrating a method of using the protector of FIG. 1 in combination with the connector of FIG. 2, wherein (a) is a cross-sectional view of the protector attached to a mold, and (b) is a protector. The figure seen from the side, (c) is a sectional view of a state in which a connecting body is further installed in (a) FIG. 3 is a diagram for explaining how to use the protective equipment, (a) is a cross-sectional view of a state where a formwork is installed on the opposite side of the connection body, and (b) is a state where concrete is placed in (a). Cross section of 4A and 4B, the method of using the protective equipment will be described. FIG. 4A is a cross-sectional view of a state where a formwork is removed after placing concrete, and FIG. Figure FIG. 5 is a diagram for explaining how to use the protective equipment. (A) is a cross-sectional view of a state where a pipe joint is inserted into a connection body of an underground burial box, and (b) is after that a corrugated pipe is connected. State diagram The other examples of the protector of this invention are shown, (a) is the front view, (b) is the external appearance perspective view. It explains how to use the protective equipment of FIG. 7, (a) is a cross-sectional view of the state where the protective equipment is installed in the underground box, (b) is a view of (a) seen from the protective equipment side, (C) is a cross-sectional view of a state where a pipe joint is installed in (a), and (d) is a view of (c) seen from the pipe joint side. 1 shows an example of a connection block using the protector of FIG. 1, (a) is a front view thereof, (b) is a sectional view thereof, (c) is an external perspective view thereof, (d) and (e) are FIG. Front view showing another example of connection block 9A and 9B illustrate a method for using the connection block of FIG. 9, (a) is a cross-sectional view of a state where the connection block is installed in the underground burial box, and (b) is a view of (a) from the outside of the underground burial box Figure, (c) is a cross-sectional view of a state where a pipe joint and corrugated pipe are connected to (a) and mortar is placed, and (d) is a view of (c) seen from the corrugated pipe. The other examples of the protector of this invention are shown, (a) is the front view, (b) is the side view, (c) is the bottom view, (d) is AA sectional drawing of (a), ( e) perspective view of its appearance 11 shows another example of a connection body in which the protector of FIG. 11 is used, in which (a) is a front view thereof, (b) is a lateral view thereof, (c) is a side view thereof, and (d) is (b9). BB cross-sectional view, (e) is an external perspective view The perspective view explaining the usage method which uses the protector of FIG. 11 in combination with the connection body of FIG. BRIEF DESCRIPTION OF THE DRAWINGS It shows an example of the underground burial box using the protector used as the background art of this invention, (a) is sectional drawing which shows the whole underground burial box, (b) is the connection which installed the protector among them. Expanded sectional view of the main part of the body part

Explanation of symbols

1-1B Fitting part 2 Fixing part (fixing hole)
2A fixing part (fixing means penetration part)
2b Hexagonal recess 3 to 3A Reinforcement bar 4 to 4A Flange part 5 to 5A Lid part 6 Fixing means (hexagon bolt)
10-10B Protective equipment 11, 11A Bell mouth part 12, 12A Connection part 20, 20A Connection body 21 Peripheral wall 30 Underground box 40 Connection block K Concrete PJ Pipe joint PW Corrugated pipe WF Formwork

Claims (8)

A protective device for protecting the connection portion of the connection body, which is embedded in the peripheral wall of the underground box made of concrete and includes a bell mouth portion and a connection portion to which a pipe or a pipe joint is connected,
In order to fix the protector removably with respect to a mold for forming the peripheral wall, and a fitting part that closely fits the entire inner periphery of the connection part and closes the opening side of the connection part, A fixing part for penetrating a nail or a hexagon bolt, and the connection part to the formwork by fitting the connection part to the fitting part in a state of being fixed by the fixing part at a desired position of the formwork A protector capable of positioning and fixing the body. The protector has a cylindrical shape in which the fitting portion on the outer peripheral side and the fixed portion on the center side are connected by a reinforcing bar, and the opposite side of the mold frame is closed with a lid portion. The protective device according to claim 1. The protector according to claim 1, wherein the fixing part is a fixing hole that penetrates from the side opposite to the formwork side of the protector to the formwork side. The hexagonal bolt is inserted into the fixing hole, and a hexagonal recess corresponding to the hexagonal portion of the hexagonal bolt is provided on the side opposite to the mold hole of the fixing hole. 3. Protective equipment according to 3. The protector according to any one of claims 1 to 4, wherein the fixing portion is a fixing means penetrating portion that allows a fixing means for fixing the protector to pass through a formwork to which the protector is to contact. The protector according to any one of claims 1 to 5, further comprising a flange portion that abuts on the end surface of the connection portion and is interposed between the end surface of the connection portion and the formwork. The flange length of the flange portion is such that when the protective equipment is buried in a state close to each other on the peripheral wall, the pipe or the pipe joint connected to the connection portion does not interfere with each other. The protective device according to claim 6. The protective device according to any one of claims 4 to 7, further comprising a hexagon bolt that is removably inserted into the fixing hole.

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