JP3115186U - Concrete product suspension structure - Google Patents

Abstract

It is possible to immediately hang a concrete product from a stacked storage state by hooking a hook such as a crane without going through troublesome work.
A concrete product is provided with a recess at a predetermined position on an outer surface or an inner surface of a concrete product so as to be bridged in the recess and not to protrude outward or inward from the outer surface or the inner surface provided with the recess. It is a suspended structure that is buried and fixed as a single unit when placing. As an example, a concave portion 23 that is long in the height direction is formed in at least two chamfered portions 22 on the diagonal line of the inner surface corner of the handhole base 20, and the hook 10 is hooked on a hanging bracket 24 that is embedded and fixed. Enables lifting and transportation.
[Selection] Figure 10

Description

  The present invention relates to underground boxes such as handholes and other concrete products, and more particularly to a concrete product suspension structure that enables the concrete products to be lifted and transported by a crane or the like.

A fixing member is embedded and fixed integrally when placing a concrete product, and a suspension member is engaged with the fixing member, and a hook such as a crane is hooked on the ring of the suspension member to lift the concrete product. Is known (Patent Document 1).
JP 2004-323235 A

In addition, as described in Non-Patent Document 1, there has been proposed one in which an anchor is embedded and fixed using a former when a concrete product is placed, and the anchor is coupled to a coupler and is lifted by a hook.
Taiheiyo Material Co., Ltd. homepage, Deha system (concrete product hanger), search on December 8, 2004, Internet <URL: http://www.taiheiyo-m.co.jp/top/abstruct.php3?S_ID= 123>

  According to the prior art as described in Patent Document 1, a concrete member can be lifted by hooking a hook such as a crane with the suspension member engaged with the fixing member. Projecting from the upper surface of the concrete product, it is necessary to remove the suspension member when the concrete product is stacked and stored. For this reason, the engaging operation of the suspension member required for the lifting operation with respect to the fixing member is troublesome, and there is a high possibility that the suspension member is lost.

  The conventional techniques using the members described in Patent Document 2 and Patent Document 3 also have the same problem. Further, since a dedicated anchor and coupler are required, the versatility is lacking and the cost is high.

  Therefore, in view of the above-mentioned problems in the prior art, the present invention suspends a concrete product having a novel structure that enables a concrete product to be hooked and lifted immediately from a stacked storage state without going through troublesome work. The purpose is to provide a structure.

  In order to achieve the above object, the present invention according to claim 1 is provided with a concave portion at a predetermined position on the outer surface or inner surface of a concrete product, and bridges the concave portion from the outer surface or inner surface provided with the concave portion. A suspension structure for a concrete product, characterized in that a suspension metal fitting is embedded and fixed integrally when placing the concrete product so as not to protrude outward or inward.

  The present invention according to claim 2 is a concrete product suspension structure according to claim 1, wherein the suspension metal fitting has a bent portion at the apex, and the leg portions are gradually separated from both ends of the bent portion as they go downward. The leg and pedestal are embedded in the concrete on both sides of the recess, and only the bent part is exposed in the recess in a bridged state. It is characterized by.

  According to a third aspect of the present invention, in the concrete product suspension structure according to the second aspect, the leg portion of the suspension fitting has a length dimension larger than the depth of the recess.

  According to a fourth aspect of the present invention, in the concrete product suspension structure according to any one of the first to third aspects, the concave portion has a curved surface shape at least at both corners in the longitudinal cross section, and in the cross section in the width direction. It has a substantially trapezoidal shape in which the groove width becomes narrower toward the bottom.

  According to a fifth aspect of the present invention, there is provided the concrete product suspension structure according to any one of the first to fourth aspects, wherein at least a pair of corners on the diagonal line of the top surface or the bottom surface of the concrete product has a longitudinal direction on the diagonal line. And a groove bottom corner at at least one end in the longitudinal direction of the recess is formed in a curved shape.

  According to a sixth aspect of the present invention, there is provided the concrete product suspension structure according to any one of the first to fourth aspects, wherein at least the chamfered portions of the corner portions on the diagonal line of the inner surface of the box-shaped concrete product are in the height direction. A recess having a longitudinal direction is formed in the recess, and a groove bottom corner at the lower end of the recess is formed in a curved shape.

  According to a seventh aspect of the present invention, in the concrete product suspension structure according to any one of the first to sixth aspects, at least a pair of corner portions on a diagonal line on the top surface or the bottom surface of the concrete product has a longitudinal direction on the diagonal line. A concave portion is formed.

  According to the suspension structure of the present invention, a concave portion is provided at a predetermined position on the outer surface or inner surface of a concrete product, and does not protrude outward or inward from the outer surface or inner surface provided with the concave portion so as to bridge the concave portion. As described above, since the hanging metal fitting is integrally embedded and fixed when placing the concrete product, it is possible to immediately hang the concrete product from the stacked storage state by hooking a hook such as a crane without going through troublesome work.

  FIG. 1 shows a handhole slab (upper part) 1 as a concrete product. Long grooves 3 extending along the diagonal line are formed at two corners on the upper surface 2 opposite to the diagonal line. A hanging metal fitting 4 is embedded and fixed so as to bridge and not protrude upward from the upper surface 2.

  Referring to FIG. 1 together with FIG. 2, which is a top view of the suspension structure portion, FIG. 3 which is a cross-sectional view taken along the line AA, and FIG. 4 which is a cross-sectional view taken along the line BB. By bending a stainless material or the like having a predetermined diameter, it has a bent portion 5 at the apex and is formed into a slightly U-shaped shape that is slightly widened at the apex. Only the bent portion 5 is buried and exposed in the long groove 3 in a bridge shape. The length of the leg portion 6 of the hanging metal fitting 4 is larger than the depth D of the long groove 3. A pedestal 7 is provided at the tip of each of the legs 6 and 6, and is embedded in the concrete 8 and 8 at a position below the bottom of the long groove 3.

  The long groove 3 is curved at least at both corners in the longitudinal section B-B (FIG. 4) so that a hook such as a crane can be easily hooked on the bent portion 5 of the hanging metal fitting 4 when the handhole slab 1 is lifted. It is preferable to have surface shapes 9 and 9 and to have a substantially trapezoidal shape in which the groove width becomes narrower toward the bottom in the cross section AA in the width direction (FIG. 3). The depth D of the long groove 3 is determined depending on the size of the hook used when the handhole slab 1 is lifted.

  In this way, the structure of the handhole slab 1 in which the long grooves 3 and 3 are formed at two positions on the diagonal line of the upper surface 2 and the hanging metal fittings 4 are embedded and fixed in the long grooves 3 so as not to protrude from the upper surface 2. As shown in FIG. 5, the hook 10 at the tip of a crane or the like can be inserted into each long groove 3 and can be easily hooked to the hanging bracket 4, and this is performed at two diagonal lines. The handhole slab 1 can be lifted with a stable posture.

  The long groove 3 and the hanging metal fitting 4 are integrally formed and fixed when the handhole 1 is placed with concrete. For example, the concrete is poured in a state in which a punching cotter corresponding to the shape and size of the long groove 3 to be formed is disposed at a predetermined position of the mold together with the hanging metal fitting 4, and the long groove 3 is formed by extracting only the punching cotter from the cured and hardened concrete. The suspension bracket 4 can be embedded and fixed as described above. In this case, if the punching cotter is configured in a split manner or formed of an elastic material such as rubber and is made deformable, the extraction work after demolding can be easily performed.

  An example of the removal cotter is shown in FIG. This punching cotter 11 has two hard rubber bodies 13 and 13 joined to one side (lower surface) of a soft rubber plate 12 having a plane dimension substantially the same as the opening dimension on the upper surface 2 of the long groove 3 through a central slit 14. The overall shape is substantially the same as the overall shape of the long groove 3. A groove (not indicated) having a semicircular cross-sectional shape corresponding to half of the shaft diameter (of the bent portion 5 and the leg portion 6) of the suspension fitting 4 is thick on the side surface portion facing the slit 14 of each hard rubber body 13. The slits 14 between the lower ends of the hard rubber bodies 13 and 13 are formed by bending the soft rubber plate 12 upward so that the hard rubber bodies 13 and 13 are moved away from each other. The state shown in FIG. 6 in which the bent portion 5 of the hanging metal fitting 4 is set can be formed by expanding and elastically restoring the soft rubber plate 12 into a flat plate shape after inserting the hanging metal fitting 4 from the gap. A bolt shaft 15 is fixed to the center of the soft rubber plate 12 so as to protrude vertically upward, and a pair of holes 16 are provided.

  As shown in FIG. 6, when the punching cotter 11 with the hanging metal fitting 4 set therein is put into the concrete in the form of the handhole slab 1, the long grooves 3 and 3 on the diagonal line on the upper surface 2 of the handhole slab 2. Is arranged so as to be a predetermined position to be formed. For this positioning, it is preferable to fix the bolt shaft 15 fixed to the soft rubber plate 12 by attaching a contact plate and pressing the contact plate against the upper end of the mold. Thereafter, concrete is poured into the mold and cured and cured, and then the cotter 11 is pulled out after removing the backing plate. When a jig is inserted into the pair of holes 16, 16 formed in the soft rubber plate 12, the extraction work of the extraction cotter 11 can be easily performed. As a result, long grooves 3 and 3 are formed at predetermined positions, and in each long groove, the hanging metal fitting 4 is integrally embedded and fixed in the cast concrete with its leg portions 6 and 6 and the bases 7 and 7 bent. A state in which the portion 5 bridges the long groove 3 is obtained.

  FIG. 7 shows a state in which the handhole base (lower stage) 20 as a concrete product is placed upside down and placed on the ground. The hanger 4 is embedded and fixed so as to bridge the long grooves and not protrude from the bottom surface 21. Since the shape of the long grooves 3 and 3 and the hanging metal fittings 4 and 4 and the forming method thereof are substantially the same as described above, the details are omitted. In the center of the bottom surface 21 is a hole 30 for draining water.

  In the embodiment of FIGS. 1 and 6, the long grooves 3 with the suspension fittings 4 are formed at two corners on the diagonal line of the upper surface 2 of the handhole slab 1 or the bottom surface of the handhole base 20. It goes without saying that the long groove 3 with the hanging metal fitting 4 may be formed at all corners.

  As for the handhole base 20, as shown in FIG. 7, the long groove 3 with the hanging metal fitting 4 is formed on the bottom surface 21 at two corners on the diagonal line, or instead, as shown in FIGS. As described above, a long groove 23 that is long in the height direction is formed in the chamfered portion 22 at the corner of the inner surface, and the hanging metal fitting 24 is provided so as to bridge the long groove 23 and not protrude inward from the inner surface of the chamfered portion 22. It is buried and fixed. The shape of the suspension fitting 24 may be the same as that of the suspension fitting 4 in the above-described embodiment, but in this embodiment, the leg portions 26, 26 extend from both ends of the top portion 25, and a pedestal 27 is formed at the distal end of these leg portions. , 27 are integrally formed in a substantially U shape. As in the above-described embodiment, the pair of leg portions 26 and 26 are substantially embedded in the concrete 28 and 28 on both sides of the long groove 23, and only the top portion 25 is exposed in the long groove 23 in a bridge shape. The length of the leg portion 26 of the hanging metal fitting 24 is larger than the depth of the long groove 23.

  The size and shape of the long groove 23 is such that when the handhole base 20 is lifted (FIG. 10), the lower corner portion 29 is a curved surface in the longitudinal section so that the hook 10 such as a crane can be easily hooked on the hanging bracket 24. It is preferable to have a shape (FIG. 9) and a substantially trapezoidal shape (FIG. 8) in which the groove width narrows toward the bottom in the cross section in the width direction.

  In addition, although the long groove 23 with the hanging metal fitting 24 is formed at least at two locations on the diagonal line of the inner surface corner of the handhole base 20, it is preferably provided in the chamfered portions 22 at all four corners.

  The suspension structure of the present invention has been described above with reference to several embodiments. However, the present invention is not limited to these embodiments, and various embodiments are within the scope of the claims for utility model registration. Can take. For example, the suspension structure of the present invention is applicable not only to slabs and / or bases of handholes, but also to other box-like underground burial boxes. In addition, concrete products of all shapes such as rods and cones can be lifted by hooks by forming long grooves with suspension fittings as shown in the above-described embodiments on desired surface portions such as the top, bottom and inner surfaces. be able to. In the embodiment described above, the hanging metal fitting is embedded and fixed at a right angle with respect to the mounting surface. However, it may be inclined and embedded so as to follow the lifting direction by the hook.

  The shape of the suspension fitting is not necessarily limited to that shown in the above-described embodiment, and the suspension fitting 4 having a U-shape in which the leg portions 6 and 6 gradually open downward (FIG. 3) or the leg portion. As shown in FIGS. 11 (a) to 11 (c), in addition to the shape of a hanging bracket 24 (FIG. 8) having a relatively wide U-shape in which 26 and 26 are bent at right angles from both ends of the top portion 25. It is also possible to use various types of hanging brackets.

1 is a perspective view showing a handhole slab to which a suspension structure according to an embodiment of the present invention is applied. It is a top view of the suspension structure part in FIG. It is AA arrow sectional drawing in FIG. It is BB arrow sectional drawing in FIG. FIG. 5 is a cross-sectional view taken along line B-B similar to FIG. 4 in a state where a lifting hook is hooked on the suspension structure. It is a perspective view which shows an example of the punching cotter used when manufacturing the handhole slab which has this suspension structure by concrete placement. It is a perspective view which shows another embodiment of this invention with which the hanging metal fitting of the same shape and structure was applied to the bottom face of a handhole base. It is a cross-sectional view which shows the suspension structure provided in the chamfering part of the internal-surface corner | angular part of a handhole base as another embodiment of this invention. It is a longitudinal cross-sectional view which shows the suspension structure part of embodiment of FIG. It is a fragmentary perspective view which shows the state which hooked the hook for lifting to the suspension structure of this embodiment. It is a figure which shows the modification about the shape of a hanging metal fitting.

Explanation of symbols

1 Hand hole upper part (slab)
2 Corner top 3 Long groove (concave)
4 Suspension bracket 5 Bending part 6 Leg part 7 Base 8 Concrete 9 Curved surface 10 of long groove Hook 11 Removal cotter 12 Soft rubber plate 13 Hard rubber body 14 Slit 15 Bolt shaft 16 Hole for jig insertion 20 Lower part of hand hole (base)
21 Bottom surface of handhole base 22 Chamfered portion of inner corner of handhole base 23 Long groove (concave portion)
24 Suspension bracket 25 Top part 26 Leg part 27 Base 28 Concrete 29 Curved surface corner part 30 below the long groove 30 Drain hole

Claims (7)

A concave part is provided at a predetermined location on the outer surface or inner surface of the concrete product, and the hanging metal fitting is placed so that it bridges the concave portion and does not protrude outward or inward from the outer surface or inner surface provided with the concave portion. A concrete product suspension structure that is sometimes buried and fixed together. The suspension fitting has a bent portion at the apex, and each leg portion extends from the both ends of the bent portion so that the leg portion gradually extends as it goes downward, and is integrally formed with a pedestal at its lower end. The suspension structure for a concrete product according to claim 1, wherein the pedestal and the pedestal are embedded in the concrete on both sides of the concave portion, and only the bent portion is exposed in the concave portion in a substantially bridged state. The suspension structure for a concrete product according to claim 2, wherein the leg portion of the hanging metal fitting has a length dimension larger than the depth of the concave portion. The concave portion has a substantially trapezoidal shape in which at least both corners have a curved surface shape in a longitudinal section and a groove width becomes narrower toward the bottom in a width section. A suspended structure of a concrete product according to any one of the above. A concave portion having a longitudinal direction on the diagonal is formed in at least a pair of corners on the diagonal line of the top surface or the bottom surface of the concrete product, and a groove bottom corner portion at least one end in the longitudinal direction of the concave portion is formed in a curved shape. The suspended structure for a concrete product according to any one of claims 1 to 4, wherein the structure is suspended. A concave portion having a longitudinal direction in the height direction is formed in a chamfered portion of at least a pair of corner portions on the diagonal line of the inner surface of the box-shaped concrete product, and a groove bottom corner portion at least at the lower end of the concave portion is formed in a curved shape. The suspended structure for a concrete product according to any one of claims 1 to 4, wherein the structure is suspended. The suspension of a concrete product according to any one of claims 1 to 6, wherein a concave portion having a longitudinal direction on the diagonal line is formed in at least a pair of corners on the diagonal line of the upper surface or the bottom surface of the concrete product. Construction.

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