JP3352666B2 - Lifting equipment for porous concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for vertically lifting a porous concrete product.

[0002]

2. Description of the Related Art Generally, as a revetment work for protecting a slope of a river, there is a construction method in which a concrete block is arranged at an angle to the slope and the concrete block is exposed. This construction method has the disadvantage that the natural environment of the river is destroyed and the landscape is damaged because the plants do not regenerate.

[0003] For this reason, a revetment block construction method for the purpose of greening a river has recently been proposed. In this method, after using a porous ecological concrete product (hereinafter simply referred to as porous concrete) to cover the slope, a few months later, the seeds of the plant will germinate and grow to green the entire slope. It is.

[0004] Since the porous concrete product is formed in a porous shape so that the roots of the plants enter the soil on the slope side, the weight of the porous concrete product is lighter than that of a non-porous high-density concrete product. Nevertheless, it is very heavy for a constructor to lift by manual power, and a fixing member constituting a conventional lifting tool is embedded in a porous concrete product.

[0005]

However, in the above-mentioned conventional fixing member, since the outer diameter of a flange portion provided on the outer peripheral surface thereof is small, a lifting rod is inserted and locked inside the fixing member to produce a porous concrete product. In lifting, there is a possibility that a part of the porous concrete product is broken by the flange portion before the locking portion of the lifting rod is broken, so that the lifting operation cannot be performed.

When the porous concrete product C is to be formed by a mold, the fixing member is vertically fixed to the bottom of the cavity of the mold so as to be filled with the porous concrete. Then, the mold and the fixing member are vibrated by a vibrating device to increase the packing density of the porous concrete, and to promote the wraparound of the concrete on the entire surface of the fixing member. However, the concrete on the upper surface side of the flange portion is hard to spill to the lower surface side of the flange portion, the packing density of the concrete is low, the concrete strength of the place requiring the most strength is reduced, and therefore, when lifting the concrete product, In addition, there is a problem that concrete is broken by the flange portion and cannot be lifted.

Furthermore, since the length of the conventional fixing member is fixed, the fixing member cannot be buried deep from the surface of the concrete product, and the porous concrete is broken when the porous concrete product is lifted. There was something. It is also conceivable that the flange portion of the fixing member is buried at a deeper position in the porous concrete product by increasing the vertical dimension of the fixing member. However, in this case, it is necessary to constitute the entire fixing member with a relatively expensive synthetic resin material, and there is a problem in terms of material cost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems in the prior art, to optimize the packing density of porous concrete around a fixing member, to firmly embed the fixing member in a concrete product, and to surely embed the fixing member. An object of the present invention is to provide a porous concrete product lifting device capable of lifting a porous concrete product.

Another object of the present invention is to provide, in addition to the above objects,
It is an object of the present invention to provide a porous concrete product lifting device capable of reducing material costs and reducing manufacturing costs.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to claim 1 is a bottomed cylindrical fixing member embedded in a porous concrete product, wherein the fixing member has a cylindrical shape. Lifting force imparting projections for imparting a lifting force to the porous concrete product are provided at a plurality of places on the outer peripheral surface of the main body at a predetermined space (g) in the circumferential direction, and at the bottom of the cylindrical body of the fixing member. A guide projection is provided on the surface,
The porous concrete filled in the region above and corresponding to the guide projection of the cylindrical main body which is erected upside down in the cavity of the mold at the time of molding of the porous concrete product is filled with the mold and the cylinder. The gist of the present invention is that when the vibrating body is applied with vibration to increase the filling density of the porous concrete, the guiding protrusion moves to the space.

According to a second aspect of the present invention, in the first aspect, the height of the lifting force applying projection from the cylindrical main body is set to be substantially equal to or greater than the outer diameter of the cylindrical main body. It is the gist of that.

[0012] The invention according to claim 3 is the invention according to claim 1 or 2.
In the above, the gist is that the guide projection is formed in a hemispherical or conical shape. The invention described in claim 4 is
The gist of the present invention is that the lifting force applying projection is a lifting force applying plate portion formed in a triangular plate shape so as to protrude outward toward the lower end.

According to a fifth aspect of the present invention, in the fourth aspect, a guide for guiding and moving the porous concrete into the space is provided on a lower end surface of the lifting force applying plate portion when the above-described porous concrete product is formed. The point is that a ridge is formed.

According to a sixth aspect of the present invention, in the first aspect, the fixing member is divided into a plurality of parts in the longitudinal direction, and one divided cylinder is a lifting force applying cylinder, and is located above the cylinder. The other divided cylinder is one or a plurality of extension cylinders, and the lifting force applying cylinder is constituted by a cylindrical main body and a lifting force applying projection for applying a lifting force to the porous concrete product on an outer peripheral surface thereof. The gist of the present invention is that the inner peripheral surface of the tubular main body can be locked by the hanging member.

According to a seventh aspect of the present invention, in the sixth aspect, a large-diameter fitting cylindrical portion provided at a lower end portion of the extension cylindrical body is fitted and fixed to an outer peripheral portion of an upper end of the cylindrical main body. The point is that

According to an eighth aspect of the present invention, in the seventh aspect, an inner peripheral surface of the fitting cylindrical portion is press-fitted to an outer peripheral surface of an upper end of the cylindrical main body. Claim 9
In the invention according to claim 8, in claim 8, the outer peripheral surface at the upper end of the cylindrical main body is formed as a tapered peripheral surface having a smaller diameter toward the upper end,
The gist is that the inner peripheral surface of the fitting cylindrical portion is formed as a tapered peripheral surface having a larger diameter toward the lower end.

According to a tenth aspect of the present invention, in the sixth or seventh aspect, a male screw portion is formed on an outer peripheral surface of an upper end of the cylindrical main body, and a large-diameter fitting provided at a lower end of the extension cylindrical body. The gist is that a female screw part to be screwed to the male screw part is formed on the inner peripheral surface of the cylindrical part.

[0018] The invention according to claim 11 is the invention according to claims 6-9.
In any one of the above, the gist is that a tapered peripheral surface having a larger diameter toward the lower end is formed on the outer peripheral surface of the cylindrical main body.

The invention according to claim 12 is the invention according to claims 6 to 9
In any one of the above, the gist is that the plurality of extension cylinders are formed to the same standard so that they can be connected in series. According to a thirteenth aspect, in the twelfth aspect,
The plurality of extension cylinders have a fitting cylinder portion, and a tapered peripheral surface is formed on an inner peripheral surface thereof, and a taper of a fitting cylinder portion of the extension cylinder connected to an upper side is formed on an upper outer peripheral surface of the cylinder body. The gist is that a tapered peripheral surface that is press-fitted to the peripheral surface and that has a smaller diameter toward the upper end is formed.

According to a fourteenth aspect of the present invention, in the thirteenth aspect, a female thread portion is formed on an inner peripheral surface of the fitting cylindrical portion, and a refill cylinder connected to an upper side on an upper outer peripheral surface of the refill cylinder body. The gist is that a male screw part to be screwed into the female screw part of the fitting cylinder part of the body is formed.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The lifting device of this embodiment includes a fixing member 12 embedded and fixed in a porous concrete product C. The fixing member 1
2 is inserted into the insertion hole and screwed and connected to a lifting rod 13 as a hanging member. The fixing member 12 is composed of a pair of upper and lower split cylinders, and the lower split cylinder functions as a lifting force applying cylinder 14, and the upper split cylinder connected to the applying cylinder 14 is: It functions as a replenishing cylinder 15 that appropriately sets the depth of embedding of the application cylinder 14 in the porous concrete product C.

The lifting force applying cylinder 14 includes a cylindrical body 16 having a bottomed cylindrical shape, a guide projection 17 which will be described later integrally formed on the outer surface of the bottom of the cylindrical body 16, and the cylindrical body 1.
6 is constituted by a plurality of lifting force imparting plate portions 18 having a triangular plate shape integrally formed on the outer peripheral surface in the vertical direction.
In this embodiment, the lifting force applying plate portion 18 is
Are formed at four locations at equal intervals in the circumferential direction.

The outer peripheral surface of the upper end of the cylindrical main body 16 is formed with a tapered peripheral surface 16a having a smaller diameter toward the upper side. A fitting cylinder portion 19 having a larger diameter than the cylinder body 15 is integrally formed at a lower end portion of the extension cylinder body 15, and a taper having a larger diameter as the lower end formed on the inner peripheral surface of the fitting cylinder portion 19 becomes larger. The peripheral surface 19a is press-fitted to the tapered peripheral surface 16a at the upper end of the cylindrical main body 16.

In this embodiment, the tapered peripheral surface 16a,
The taper angle of 19a is set in a range of, for example, 0.1 to 3.0 degrees. On the inner peripheral surface of the cylindrical main body 16, a female screw portion 16 b is formed as a locking portion for screwing and locking a male screw portion 13 a formed at a lower end portion of the lifting rod 13.

The upper tapered peripheral surface 16a of the cylindrical body 16
The outer peripheral surface excluding is tapered peripheral surface 16c whose diameter becomes larger toward the lower end.
Is formed. In this embodiment, the tapered peripheral surface 1
The taper angle 6c is set, for example, in the range of 1.0 to 5.0 degrees.

The upper edges of the lifting force applying plates 18 to 18 are inclined surfaces 18a projecting outward toward the lower end.
The left and right side surfaces of the lifting force imparting plate portions 18 to 18 are flat tapered surfaces 18b, 18b whose thickness is increased toward the lower end. In this embodiment, the taper angle of the tapered surface 18b is set, for example, in a range of 1.0 to 5.0 degrees.
A chamfered portion 18c is formed at the tip of the lifting force applying plate portion 18.

The projecting height H of the lifting force applying plate portion 18 is set substantially equal to the outer diameter D1 of the cylindrical main body 16. Assuming that the outer diameter D1 is, for example, 26 mm, the overhang height H is set to 26 mm or more. That is,
The dimensional ratio of the outer diameter D1 and the overhang height H is set in the range of 1: 1-2.

The inner diameter D2 of the cylindrical main body 16 is set to be equal to or smaller than the inner diameter D3 of the extension cylindrical body 15. If the inner diameter D2 is 20.5 mm, the inner diameter D3 is 2
It is set in the range of 0.5 to 22.0 mm.

FIG. 3 is a perspective view in which the fixing member 12 is turned upside down. As is apparent from FIG. 3, a guide projection 17 for uniforming the filling density of the concrete is formed integrally with the outer surface of the bottom 26e of the cylindrical main body 16 at the time of molding the porous concrete product C as described later. Is formed. The guide protrusion 17 is formed by forming a plurality of guide protrusions 17a having a quarter-arc shape in a radial shape. A linear guide ridge 18d is integrally formed on the bottom side of the lifting force applying plate 18 so as to be continuous with the guide ridge 17a. The cross section of each of the guide ridges 17a and 18d is formed in a semicircular shape.

The method of molding the porous concrete product C will now be described with reference to FIG. Numeral 31 denotes a bottomed square box-shaped (only a part of the bottom plate is shown) mounted on a table of a vibration imparting device (not shown), and the fixing member 12 is provided upright on the bottom thereof in a reverse direction. Support pins 32 are fixed at a plurality of locations (only one location is shown). The mold frame 31 has a configuration in which four molding side plates are opened for release. The support pin 32 is a cylinder 15
Hole 15a. Reference numeral 33 denotes a pressing plate which is pressed downward by the power of a pressing device (not shown), and presses the upper surface of the filled uncured porous concrete downward to increase the packing density of the porous concrete. FIG.
Although the pressing plate 33 is illustrated as being thin, a thick iron plate is actually used, and a pressing load of, for example, 1 to several tons is applied to the upper surface of the porous concrete as a whole.

As shown in FIG. 4, the vibration device is operated in a state where the fixing member 12 and the uncured porous concrete are filled in the cavity of the mold 31 and the pressing plate 33 is placed on the upper surface of the concrete. Then, the porous concrete is compressed while reducing the gap between the particles by the vibration and the pressing force of the pressure plate 33, so that the packing density is increased.

After the porous concrete has hardened, it is released from the mold and turned upside down to obtain a concrete product C as shown in FIG. The fixing member 12 is embedded in a plurality of places (for example, two places) of the product C. In order to lift the concrete product C using the fixing member 12, a lifting rod 13 is inserted from the hole 15a of the extension cylinder 15 and the lower male screw portion 13a is formed on the inner peripheral surface of the cylindrical main body 16. It is screwed into the female screw part 16b. And the lifting rod 1
3 is suspended from a locking ring 21 provided at the upper end of the
And lift it up with a crane or the like to load and unload the product C.

When the length and width of the porous concrete product C is 998 mm, the thickness is 120 m.
m, 160mm, 220mm, 350mm, their weight is 184Kg, 260Kg, 377Kg, 551K
g. The dimensional ratio of the outer diameter D1 of the fixing member 12 embedded therein to the overhanging height H of the lifting force applying plate portion 18 is 1
When set in the range of pairs 1-2, the number of embedding in the porous concrete product C is two, and the embedding depth thereof is set to 60 mm, 75 mm, 100 mm, and 150 mm, so that the product can be lifted when the concrete product is lifted. Turned out not to be destroyed.

Next, the effects of the porous concrete product lifting device configured as described above will be described. (1) In the above embodiment, since the guide projection 17 is provided at the bottom of the cylindrical main body 16, the porous concrete filled above the bottom 16e of the cylindrical main body 16 at the time of vibration during the molding of the porous concrete product C. 4 smoothly goes into spaces g to g (see FIG. 3) formed between the plurality of lifting force applying plate portions 18 to 18 as indicated by arrows in FIG. 4, and the packing density is made uniform and increased. For this reason, the strength of the concrete in which the lifting force imparting cylindrical body 14 is embedded is increased, and the product can be reliably lifted while securing the lifting strength.

(2) In the above embodiment, since the guide ridge 18d is provided on the bottom side of the lifting force applying plate portion 18, the product C
The porous concrete above the bottom side can be guided to the space g at the time of the molding, and the packing density can be made uniform and increased.

(3) In the above embodiment, since the lifting force applying plate portion 18 is formed in a triangular plate shape, the porous concrete is appropriately wound around the slope 18a during the molding of the product C, and the highest strength is obtained during the lifting. The filling density of the porous concrete in the part requiring the above can be increased.

(4) In the above embodiment, the fixing member 12 embedded and fixed in the porous concrete product C is constituted by the lifting force applying cylinder 14 and the extension cylinder 15. For this reason, the lifting force applying cylinder 14 can be made of an expensive synthetic resin material having high mechanical strength, and the extension cylinder 15 can be made of an inexpensive synthetic resin material having low mechanical strength. Material costs can be reduced.
By using 6.6 nylon containing 30% glass fiber as the material of the cylinder 14 and using polypropylene resin as the material of the extension cylinder 15, the material cost of the entire fixing member 12 can be reduced. it can.

(5) In the above embodiment, since the fixing member 12 is formed separately from the lifting force applying cylinder 14 and the extension cylinder 15, only the inexpensive extension cylinder 15 is lengthened, and the entire fixing member 12 is formed. The length dimension can be set long, and therefore, the lifting force applying cylinder 14 can be embedded at a low position in the porous concrete product C at low cost.

(6) In the above embodiment, the tapered peripheral surface 16a is provided on the outer peripheral surface of the upper end of the cylindrical main body 16, and
5 has a tapered peripheral surface 19a on the inner peripheral surface of the fitting cylindrical portion 19 at the lower end.
Is provided, and both tapered peripheral surfaces are press-fitted, so that the lifting force applying cylinder 14 and the extension cylinder 15 can be easily joined by tapping in a factory or a production site of a porous concrete product. In addition, depending on the size of the porous concrete product, the extension cylinders 15 having different lengths are provided.
To 15, a cylindrical body 15 having a suitable length can be selected.

(7) In the above embodiment, the outer peripheral surface of the cylindrical main body 16 is a tapered peripheral surface 16c whose diameter becomes larger toward the lower end. Can function as a member for providing a part of the cylindrical body 16, and the mechanical strength of the tubular main body 16 can be improved.

(8) In the above embodiment, the overhanging height H of the lifting force applying plate portion 18 of the lifting force applying cylinder 14 is set to be approximately the same as or larger than the outer diameter D1 of the cylindrical main body 16. When the lifting force applying cylinder 14 is embedded in the porous concrete product, the concrete product can be reliably lifted without being broken.

(9) In the above embodiment, the tapered surface 18 is formed such that the left and right side surfaces of the lifting force applying plate portion 18 are thicker toward the lower end.
Since b and 18b are used, the entire lifting force applying plate portion 18 can function as a surface for applying a lifting force to the porous concrete product.

This embodiment can be embodied with the following modifications. In the following embodiments,
Effects similar to the effects (1) to (9) of the embodiment shown in FIG. 1 are omitted, and different effects will be described.

As shown in FIG. 6, the guide projection 17 may be formed in a hemisphere having a hemispherical guide surface 17b, or as shown in FIG. 7, may be formed in a cone having a conical guide surface 17b. Although not shown, a triangular pyramid or a quadrangular pyramid may be used.

In these embodiments, the porous concrete is guided and moved to the space g more smoothly during the molding of the product C. -As shown in FIG. 8, the height dimension of the lifting force imparting plate portions 18 to 18 in the vertical direction can be reduced.

In this case, the lifting force can be ensured by increasing the number of the lifting force applying plate portions to five to eight instead of four. As shown in FIG. 9, the refill cylinder 15 is formed into a single-diameter cylindrical shape, and the large-diameter fitting cylinder 1 is attached to the upper end of the cylindrical main body 16.
9 is provided. A tapered peripheral surface 15 b having a smaller diameter toward the lower end is formed in the outer peripheral portion at the lower end of the extension tubular body 15, and the tapered peripheral surface 15 b is press-fitted to the tapered peripheral surface 19 a of the fitting tubular portion 19. A flange portion 15c for preventing the cylindrical body 15 from slipping upward is integrally formed on the outer periphery of the cylindrical body 15 near the lower end.

As shown in FIG. 10, a male screw portion 16d is formed on the outer peripheral portion of the upper end of the cylindrical main body 16, and
A female screw portion 19b may be formed on the inner peripheral surface of the fitting cylindrical portion 19, and the male screw portion 16d may be screwed into the female screw portion 19b.

In this embodiment, the two cylindrical bodies 15 and the cylindrical main body 16 can be securely connected. As shown in FIG. 11, a plurality of extension cylinders 15 having the same standard or different lengths may be connected in series in the vertical direction.

In this embodiment, the additional cylinders 15-1
The entire length of the fixing member 12 can be easily changed by press-fitting the tapered peripheral surface 15b formed at the upper end portion of the fixing member 12 to the tapered peripheral surface 19a of the fitting cylindrical portion 19 of the cylindrical body 15 located on the upper side. can do.

. As shown in FIG.
A female screw portion 19b may be provided on the inner peripheral surface of the fitting cylindrical portion 19, and a male screw portion 15d may be provided on the outer peripheral surface of the upper end. In this embodiment, a plurality of extension cylinders 15 to 15 having the same standard or different lengths are prepared in advance, and these are connected in series so that the overall length of the fixing member 12 can be easily adjusted. Can be changed.

As shown in FIG. 13, the tubular body 15 may be omitted and the tubular body 16 may be extended. In this embodiment, the number of components can be reduced and the manufacture can be easily performed. Although not shown, the slope 1 of the lifting force applying plate portions 18 to 18
8a to 18a may be formed so as to increase continuously or stepwise toward the tip.

In this embodiment, the projected area in the vertical direction of the slope 18a can be effectively used for securing the lifting force as compared with the parallel slope 18a. That is, since the porous concrete product is more difficult to be broken as it is farther from the outer peripheral surface of the cylindrical main body 16, it is desirable to increase the area of the slope 18a on the hardly broken side.

In the above-described embodiment, the male threaded portion 13a at the lower end of the lifting rod 13 is screwed into the female threaded portion 16b of the cylindrical main body 16 to lift the porous concrete product. Although not shown, an engagement recess may be provided on the inner peripheral surface of the cylindrical main body 16, and an engagement pin capable of engaging with the engagement recess may be protruded from the lower end of the lifting rod 13. .

The fixing member 12 may be embedded in the porous concrete product C in a horizontal direction, and the lifting rod 13 may be inserted and locked in a horizontal direction to lift the product C.

The lifting force applying plate 18 is provided at two places,
Or five or more locations. However, as the number increases, the space g becomes smaller, and it is difficult to smoothly fill the space g with the porous concrete at the time of molding the product C. Therefore, two to six locations are desirable.

Next, technical ideas other than the claims grasped from the embodiment will be described below. (Technical idea 1) A porous concrete product in which the fixing member 12 according to any one of claims 1 to 14 is embedded at a plurality of locations.

The invention described in the technical concept 1 can improve the lifting strength of a porous concrete product incorporating a fixing member. (Technical idea 2) The lifting tool for a porous concrete product according to claim 4, wherein the left and right side surfaces of the lifting force applying plate portion have tapered surfaces that are thicker toward the lower end.

According to the technical idea 2, the lifting force can be increased as compared with the lifting force applying plate portion whose left and right side surfaces are parallel. (Definition) In this specification, the lifting force applying projection includes, in addition to the lifting force applying plate 18, a horizontal bar-shaped projection, a horizontal U-shaped projection, or a closed annular projection.

The space g also includes a closed annular gap in addition to the space opened outward.

[0060]

As described above in detail, according to the first to fourteenth aspects of the present invention, the strength of burying the fixing member in the porous concrete product can be improved, and the product can be reliably lifted.

According to the first and second aspects of the present invention, at the time of molding a concrete product, the space between the plurality of lifting force applying projections can be uniformly and reliably filled with the porous concrete to further improve the burying strength. .

According to the third aspect of the present invention, when the concrete product is molded, the guide movement to the space between the lifting force applying projections of the porous concrete can be smoothly performed, and the burying strength of the fixing member can be further improved. .

According to the fourth aspect of the present invention, since the triangular lifting force imparting plate portion is used, the concrete can be surely wrapped into the lower space corresponding to the inclined surface of the plate portion during the molding of the concrete product, and the lifting strength can be increased. Can be improved.

According to a fifth aspect of the present invention, a guide ridge formed on a lower end face of a lifting force applying plate portion at the time of molding a concrete product smoothly guides concrete into the space of each of the plate portions, and Can be made uniform in packing density.

According to the sixth aspect of the present invention, material costs can be reduced and manufacturing costs can be reduced. According to the seventh aspect of the present invention, the large-diameter fitting tubular portion provided at the lower end of the extension tubular body is fitted and fixed to the outer peripheral portion of the upper end of the tubular main body, so that the fitting structure is simplified. be able to.

According to the eighth aspect of the present invention, the inner peripheral surface of the fitting cylindrical portion is press-fitted to the outer peripheral surface of the upper end of the cylindrical main body.
The fitting operation can be performed quickly. According to a ninth aspect of the present invention, the outer peripheral surface of the upper end of the cylindrical main body is formed on a tapered peripheral surface having a smaller diameter toward the upper end, and the inner peripheral surface of the fitting cylindrical portion has a tapered peripheral surface with a larger diameter toward the lower end. Since it is formed, the fitting operation can be performed quickly.

According to a tenth aspect of the present invention, a male screw portion is formed on the outer peripheral surface of the upper end of the cylindrical main body, and a male screw is formed on the inner peripheral surface of the large-diameter fitting cylindrical portion provided at the lower end of the extension cylindrical body. Since the female screw portion to be screwed to the screw portion is formed, the connected state can be reliably maintained.

According to the eleventh aspect of the present invention, since the outer peripheral surface of the cylindrical main body is formed with a tapered peripheral surface having a larger diameter toward the lower end, the cylindrical main body shares a part of the lifting force, The lifting force can be increased, and the mechanical strength of the tubular main body can be improved with the female screw formed.

According to the twelfth aspect of the invention, since the plurality of extension cylinders are formed to the same standard so that they can be connected in series, the total length of the extension cylinder can be easily adjusted.

According to the thirteenth aspect, a plurality of extension cylinders can be easily fitted and connected. Claim 14
In the invention described in (1), a plurality of extension cylinders can be securely screwed and connected.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a fixing member is embedded in a porous concrete product.

FIG. 2 is an exploded perspective view of a fixing member.

FIG. 3 is a perspective view in which a fixing member is turned upside down.

FIG. 4 is a partial longitudinal sectional view illustrating a method of forming a porous concrete product by reversing the fixing member.

FIG. 5 is a perspective view showing a suspended state of a porous concrete product.

FIG. 6 is a perspective view of only a lifting force applying cylinder showing another embodiment.

FIG. 7 is a perspective view of only a lifting force applying cylinder showing another embodiment.

FIG. 8 is a perspective view of only a lifting force applying cylinder showing another embodiment.

FIG. 9 is a longitudinal sectional view of a fixing member according to another embodiment.

FIG. 10 is a longitudinal sectional view of a fixing member according to another embodiment.

FIG. 11 is a front view of a fixing member according to another embodiment.

FIG. 12 is a cross-sectional view of another embodiment of the present invention, showing only the extension cylinder.

FIG. 13 is a longitudinal sectional view of a fixing member according to another embodiment.

[Explanation of symbols]

Reference numeral 12: fixing member, 13: lifting rod as a hanging member, 14: lifting force applying cylinder, 15: extension cylinder, 1
Reference numeral 6: cylindrical main body, 16a: tapered peripheral surface, 16b: female screw portion as a locking portion, 16c: tapered peripheral surface, 17: guide projection, 17a: guide projection, 17b: guide surface, 18: lifting force Lifting force imparting plate portion as imparting projection, 18a ... slope,
18b: tapered surface, 19: fitting cylindrical portion, 19a: tapered peripheral surface, 19b: female screw portion, 19c: male screw portion, C: porous concrete product.

Claims (14)

(57) [Claims] A bottomed cylindrical fixing member (12) embedded in a porous concrete product, wherein a lifting force is applied to the outer peripheral surface of a cylindrical main body (16) of the fixing member (12). Are provided at a plurality of locations with a predetermined space (g) in the circumferential direction, and the bottom (16) of the cylindrical body (16) of the fixing member (12) is provided.
e) A guide projection (17) is provided on the outer surface to guide the cylindrical body (16), which is installed upside down in the cavity of the formwork (31, 33) during the molding of the porous concrete product. The porous concrete filled in the area above and corresponding to the projection (17) is filled with the formwork (31, 33).
When the vibration is applied to the cylindrical body (16) to increase the packing density of the porous concrete, the guide projection (17)
A lifting tool for a porous concrete product, configured to guide and move to the space (g). 2. A height (H) of the lifting force applying projection (18) from the cylindrical body (16) is equal to the height of the cylindrical body (1).
The lifting tool for a porous concrete product according to claim 1, wherein the outer diameter (D1) is set to be substantially the same as or larger than (6). 3. A lifting tool for a porous concrete product according to claim 1, wherein the guide projection is formed in a hemispherical or conical shape. 4. The porous concrete according to claim 2, wherein the lifting force applying projection (18) is a lifting force applying plate portion (18) formed in a triangular plate shape so as to project outward toward a lower end. Product lifting equipment. 5. A guide projection for guiding and moving porous concrete into said space (g) at the time of forming the aforementioned porous concrete product at the lower end surface of said lifting force applying plate portion (18). A lifting tool for a porous concrete product on which a strip (18d) is formed. 6. The fixing member according to claim 1, wherein
2) is divided into a plurality of pieces in the longitudinal direction, and one divided cylinder is used as a lifting force applying cylinder (14), and another divided cylinder located above the cylinder (14) is added with one or more additional cylinders Tube (1
5), the lifting force applying cylinder (14) is constituted by a cylindrical main body (16) and a lifting force applying projection (18) for applying a lifting force to a porous concrete product on an outer peripheral surface thereof; An engaging portion (16b) capable of engaging the hanging member (13) is provided on the inner peripheral surface of the main body (16), and the material of the extending cylinder (15) is different from that of the lifting force applying cylinder (14). Lifting tool for porous concrete products. 7. The cylindrical body (1) according to claim 6, wherein
6) A lifting tool for a porous concrete product in which a large-diameter fitting tubular portion (19) provided at a lower end portion of an extension tubular body (15) is fitted and fixed to an outer peripheral portion of an upper end. 8. The cylindrical body (1) according to claim 7, wherein
6) A lifting tool for a porous concrete product in which the inner peripheral surface of the fitting tubular portion (19) is press-fitted to the outer peripheral surface at the upper end. 9. The tubular body (16) according to claim 8, wherein:
The outer peripheral surface at the upper end of the taper peripheral surface (16
A concrete product lifting device formed in (a), wherein an inner peripheral surface of the fitting tubular portion (19) is formed on a tapered peripheral surface (19a) having a larger diameter toward a lower end. 10. A large-diameter large-diameter member provided at a lower end of the refilling cylinder (15) according to claim 6 or 7, wherein a male screw portion (16d) is formed on an outer peripheral surface of an upper end of the cylindrical main body (16). The male screw portion (16d) is provided on the inner peripheral surface of the fitting tube portion (19).
A lifting tool for a porous concrete product in which a female screw portion (19b) to be screwed is formed. 11. The lifting of a concrete product according to any one of claims 6 to 9, wherein a tapered peripheral surface (16c) having a larger diameter at a lower end is formed on an outer peripheral surface of the cylindrical main body (16). Utensils. 12. A lifting tool for a porous concrete product according to claim 6, wherein the plurality of extension cylinders (15) are formed to the same standard so that they can be connected in series. 13. The cylindrical body (15) according to claim 12, wherein the plurality of extension cylinders (15) have a fitting cylinder portion (19), and a tapered peripheral surface (19a) is formed on an inner peripheral surface thereof. ) Is press-fitted onto the tapered peripheral surface (19a) of the fitting cylindrical portion (19) of the refill cylindrical body (15) connected to the upper side, and the diameter of the tapered peripheral surface (15b) becomes smaller at the upper end. ) Is a porous concrete product lifting tool on which is formed. 14. The fitting cylindrical part (1) according to claim 13,
A female screw portion (19b) is formed on the inner peripheral surface of 9), and the fitting cylindrical portion (19) of the refill cylinder (15) connected to the upper side is formed on the upper outer peripheral surface of the refill cylinder (15). Female thread (1
9b) A concrete product lifting tool having a male screw portion (15d) screwed to 9b).