JP3245823U - Handhole and handhole body forming equipment - Google Patents

Abstract

The present invention provides a hand hole that can accommodate various heights without using an intermediate body and that can be easily handled by reducing the height of the cover. SOLUTION: A box-shaped main body 100, a cover 110 that covers an opening 103 of the main body 100, and a lid holder ring 120 that is attached to a top surface 113 of the cover 110 and continuous to a base opening 112 provided in the cover 110. and a lid that closes the lid opening 122 of the lid holder ring 120, and the maximum height Ha from the lower surface of the bottom wall 101 to the open end surface 104 of the main body 100 is adjusted within the range of 400 mm≦Ha≦1800 mm. The cover 110 is formed by setting the maximum height Hb from the joint surface 111 to the top surface 113 to 50 mm≦Hb≦150 mm, and the cover holder ring 120 is formed by setting the maximum height Hb from the bonding surface 111 to the top surface 113 to be 50 mm≦Hb≦150 mm. The maximum height Hc was set to 50 mm≦Hc≦150 mm. [Selection diagram] Figure 1

Description

Application for application of Article 30, Paragraph 2 of the Patent Act as applied mutatis mutandis in Article 11 of the Utility Model Act Pamphlet for "Hand Hole [Masugata]" published on February 27, 2020 [Publications, etc.] September 2020 A pamphlet with a comparison table of "Hand holes [Match type]" published on the 7th [Publications, etc.] Instructions for the construction procedure of "Hand holes [Match type]" published on September 7, 2020 [Publications, etc. ] Brochure of sold products (2 types, 600 type and 900 type) and list of sales destinations (first sales date: April 5, 2020)

The present invention mainly relates to a handhole installed as a relay point when laying electrical or communication cables, and a molding device for the main body of the handhole.

Conventionally, this type of hand hole is known, for example, as disclosed in Japanese Patent Laid-Open No. 7-259110. As shown in FIG. 18, the hand hole Ta is made up of a rectangular bottom wall 201 and a side wall 202 erected from the bottom wall 201, and is made of concrete and has an open opening 203 that faces upward when installed. It has a main body 200, a top wall 212 having a base opening 211 penetrating in the vertical direction, and a joint surface 213 that is vertically disposed on the top wall 212 and can be joined to the open end surface 204 of the main body 200 on the open mouth 203 side. A box-shaped cover 210 made of concrete consisting of a side wall 214 that joins joint surfaces 213 and covers the open opening 203, and an attachment surface 221 that is attached to the top surface 215 of the cover 210, and this attachment surface 221 is attached. A lid receiving ring 220 made of concrete and having a lid opening 222 that is attached to the cover body 210 and continuous to the base opening 211; and a lid 230 that is removably provided on the upper surface of the lid receiving ring 220 and closes the lid opening 222 when attached. It is composed of: The lid is made of metal such as iron, for example.

Furthermore, depending on the installation conditions, it may be necessary to use a hand hole Ta with a high overall height. In order to accommodate this, conventionally, as shown in FIG. A rectangular cylindrical concrete intermediate body 230 is interposed between the body 210 and the body 210. As the intermediate body 230, one type or several types with different heights are prepared. The main body 200, cover 210, intermediate body 230, and lid receiving ring 220 of this hand hole Ta have unique heights and are molded using a dedicated molding device. As a result, for example, the hand hole Ta is constructed by the main body 200, cover 210, and lid receiving ring 220 without using the intermediate body 230 until the total height is about 900 mm, and when the total height exceeds 900 mm, the desired total height is One or more intermediate bodies 230 having the optimum height are selected and interposed between the main body 200 and the covering body 210 so that the intermediate body 230 has an optimal height. When two or more intermediate bodies 230 are used, the intermediate bodies 230 are stacked and interposed.

Japanese Patent Application Publication No. 7-259110

By the way, in this conventional hand hole Ta, if it is necessary to use one with a high overall height, an intermediate body 230 is interposed between the main body 200 and the covering body 210. Since the intermediate body 230 is larger than the lid holder ring 220, handling becomes more troublesome and the number of structures increases, making management complicated. There was a problem. Furthermore, since a molding device for molding the intermediate body 230 is also required, the manufacturing efficiency is correspondingly lower. Furthermore, since the cover 210 is also molded in the shape of a box, its height is relatively high, and there is a problem in that it is complicated to handle.

The present invention was developed in view of these problems, and allows the cover to be used at various heights without using an intermediate body, while also making it easier to handle by reducing the height of the cover. The purpose of the present invention is to provide a hand hole that provides a Another object of the present invention is to provide a handhole body molding device that can mold handhole bodies with different heights, thereby creating a handhole that does not require the use of an intermediate.

The hand hole of the present invention to achieve such a purpose has a box-shaped main body consisting of a bottom wall and a side wall erected on the bottom wall, and has an open opening facing upward when installed, and an open opening of the main body. A covering body having a joint surface that is joined to an end surface of the open mouth on the mouth side, and a base opening that covers the open mouth by joining the joint surface and penetrates in the vertical direction; and a cover body that is attached to the top surface of the covering body. a lid holder ring having a lid opening that is attached to the cover body with the attachment surface attached and that is continuous with the base opening; In the hand hole equipped with a lid that closes the lid opening,
The main body is integrally molded with concrete, and the maximum height Ha from the lower surface of the bottom wall to the end surface of the open opening is adjusted in the range of 400 mm≦Ha≦1800 mm,
The cover is integrally molded with concrete, and the maximum height Hb from the joint surface to the top surface is set to 50 mm≦Hb≦150 mm,
The lid receiving ring is integrally molded with concrete, and the maximum height Hc from the attachment surface to the upper surface is set to 50 mm≦Hc≦150 mm.

Thereby, when manufacturing the main body, cover, and lid receiving ring of the handhole, molding is performed using molding equipment corresponding to these. In this case, the main body is formed so that the maximum height Ha from the lower surface of the bottom wall to the end surface of the opening is adjusted to be in the range of 400 mm≦Ha≦1800 mm, in accordance with the total height of the hand hole. On the other hand, the cover is formed so that the maximum height Hb from the joint surface to the top surface has a predetermined dimension in the range of 50 mm≦Hb≦150 mm, and the cover holder ring is formed so that the maximum height Hb from the joint surface to the top surface is within the range of 50 mm≦Hb≦150 mm. The height Hc is formed to be a predetermined dimension in the range of 50 mm≦Hc≦150 mm. As a result, a hand hole with a total height H in the range of 500 mm≦H≦2100 mm is obtained. Therefore, unlike in the past, there is no need to use an intermediate body, and it is possible to install a hand hole with a full height that corresponds to the installation conditions. Since there is no need to use intermediates, management becomes extremely easy and efficiency can be improved. Further, since the maximum height Hb from the joint surface to the top surface of the cover is 50 mm≦Hb≦150 mm, it is lower than that of the conventional cover, and the cover becomes smaller and easier to handle.

and, if necessary, the open end face of the main body is configured with a convex portion that protrudes along the circumferential direction of the open mouth,
The joint surface of the cover is configured to include a recess that fits into the convex part,
The top surface of the cover is configured with a convex portion that protrudes along the circumferential direction of the base opening,
The attachment surface of the lid receiving ring is configured to include a concave portion that fits into the convex portion.

As a result, the main body and cover are connected by fitting the protrusions and recesses together, and the cover and the cover ring are connected by fitting the protrusions and recesses, ensuring reliable positioning. At the same time, they do not shift from each other in the horizontal direction, and the installation can be stabilized.

Further, if necessary, a space may be interposed between the top surface of the cover and the attachment surface of the lid holder ring and have a communication hole that communicates with the lid opening. Equipped with a salling,
The lower end face of the spacer ring is formed with a continuous concave part having the same shape and size as the concave part of the lid receiving ring, and the upper end face of the spacer ring is formed with the same convex part as the convex part of the cover. Formed with continuous convex portions of the same size and shape,
The spacer ring is integrally molded with concrete, and the maximum height Hd from the lower end surface to the upper end surface is set to 50 mm≦Hd≦300 mm.

Thereby, the height position of the lid holder ring relative to the ground can be finely adjusted by the spacer ring, so that installation accuracy can be improved. Because the spacer ring is small, its molding is easier compared to conventional intermediates. In addition, the cover and the spacer ring are connected by fitting the convex part and the continuous concave part, and the spacer ring and the lid receiving ring are connected by fitting the convex part and the concave part together. Since they are connected, positioning is ensured and they do not shift horizontally from each other, making it possible to stabilize the installation. Incidentally, it is also possible to provide a plurality of spacer rings.

In order to achieve the above object, the hand hole main body forming device of the present invention comprises a bottom wall and a side wall erected on the bottom wall, and has a box-like opening that faces upward when installed. In a hand hole body molding device that molds a hand hole body having a body with the lower surface of its bottom wall exposed upward,
a support base, an outer mold supported by the support base and molding the outer surface of the side wall, an inner mold supported by the support base molding the inner surface of the bottom wall and the inner surface of the side wall, and the support base an end face mold that is supported and forms an open end face of the side wall;
The outer mold is divided into a plurality of divided outer molds, and all or part of each divided outer mold is movable to two positions: a molding position and a separate position spaced outward from the molding position,
The above-mentioned inner mold is divided into a plurality of divided inner molds, and all or part of each divided inner mold is moved to two positions: a molding position and a separation position where the inner mold is moved inward from the molding position to reduce the size of the inner mold. enable,
Height adjustment means for providing the end mold movable up and down, moving the end mold up and down to position it at a desired position, and adjusting the maximum height Ha from the lower surface of the bottom wall of the main body to the end surface of the open opening. It is configured with the following.

When molding the main body using the hand hole main body molding device having this configuration, first, the end face mold is moved up and down by the height adjusting means to position it at the desired position according to the maximum height Ha of the main body, and The outer mold and inner mold are positioned at the molding position, and then fluid concrete is poured from above between the outer mold and the inner mold. Then, after curing for the required time, the mold is removed.
When demolding, first, the movable divided inner mold of the inner mold is moved from the molding position to the separated position, the outer mold is moved to the separated position, and in this state, the main body is lifted up with a crane or the like. In this case, the inner mold is reduced in size by the movement of the divided inner mold, so demolding can be performed without difficulty and the main body can be easily taken out.

Since the main body formed in this manner can be taken out by reducing the inner mold, the side wall can be formed straight, and the thickness of the side wall can be made constant. In addition, the height of the main body is adjusted by the height adjustment means according to the maximum height Ha of the main body, so that, for example, the maximum height from the lower surface of the bottom wall to the end surface of the open mouth can be adjusted according to the total height of the hand hole. It can be formed by adjusting the length Ha to be in the range of 400 mm≦Ha≦1800 mm. As a result, it is possible to obtain a hand hole with a total height H in the range of 500 mm≦H≦2100 mm, which eliminates the need to use an intermediate material as in the past, and is compatible with installation conditions. A full height hand hole can be installed. Since there is no need to use intermediates, management becomes extremely easy and efficiency can be improved.

In this case, it is effective to configure the height adjusting means with a spacer interposed between the support base and the end mold. As a spacer, prepare multiple types of block-shaped ones with different heights, select one according to the maximum height Ha of the main body, and use it by interposing it between the support stand and the end face mold. be able to. Alternatively, it is possible to prepare a plurality of blocks having a predetermined height, stack them according to the maximum height Ha of the main body, and interpose them between the support stand and the end mold. Alternatively, in the case where a plurality of types of blocks with different heights are prepared, the blocks with different heights can be combined and stacked for use. In this case, two or more of the same height may be stacked. Since it is a spacer, the structure can be simplified. Further, it is possible to correspond to a desired maximum height Ha in response to an order from a customer, for example, thereby improving versatility.

In this case, it is also effective to configure the height adjusting means with a jack interposed between the support base and the end mold. Raise and lower the end mold using a jack according to the maximum height Ha of the main body. Operability can be improved. In this case as well, the desired maximum height Ha can be accommodated, for example, in response to an order from a customer, and versatility can be improved.

If necessary, the plurality of split inner molds of the inner mold are combined into a central split inner mold for molding the center part of the bottom wall excluding the outer periphery of the bottom wall, and a split inner mold for molding the outer periphery of the bottom wall and the part connected thereto. a plurality of peripheral molding divided inner molds for molding the side walls, and the central molding divided inner mold is movable to two positions: the molding position and a separate position spaced inward from the molding position. , all or part of the peripheral molding divided inner molds can be moved to two positions: the molding position and a spaced position spaced inward from the molding position at the separated position of the central molding divided inner mold.
As a result, by moving the central split inner mold to the separated position and then moving the surrounding split inner mold, it is possible to move the split inner molds to the separated position so that they do not interfere with each other, and also to prevent the split inner molds from interfering with each other. Sliding on the inner surface can be almost eliminated, and the divided inner mold can be moved easily.

If necessary, the main body of the hand hole may be formed by forming a main body comprising a polygonal bottom wall and a side wall erected on the bottom wall, with corner portions formed on the side wall, with the bottom wall facing upward. In the apparatus, a movable peripheral molding divided inner mold among the peripheral molding divided inner molds is configured to include a corner molding surface for molding a corner portion of the side wall. As a result, the part where the corner part is molded is made movable, so the part where the frictional resistance with the main body is high can be moved back, and demolding can be easily and easily performed.
If necessary, a presser part may be provided on the outer periphery of the central split inner mold to abut against the inside of the peripheral split inner mold at the molding position of the central split inner mold to press down the surrounding split inner mold. It is said that As a result, the peripheral molding divided inner mold is held down by the central molding divided inner mold, so that each divided inner mold is reliably positioned at the molding position without wobbling.

Furthermore, the structure includes a moving mechanism for moving the movable split inner mold of the inner mold, if necessary. Since the movement is performed by the movement mechanism, the movement of the divided inner mold becomes easy.
In this case, the moving mechanism includes a worm provided on a rotating shaft that can be rotated from the outside, a worm wheel that is rotated by the worm and has a rotating shaft, and a worm wheel that is rotatable with the rotating shaft of the worm wheel. It is effective to provide a reciprocating mechanism that is linked between the divided inner molds and moves the divided inner molds forward and backward by rotation of the rotating shaft.
As a result, it can be moved with a simple mechanism of a worm and a worm wheel, and the transmission of force is reliable, which is extremely advantageous when moving a large mold.

Moreover, the structure includes a center moving mechanism for moving the center molding split inner mold, if necessary.

If necessary, the central moving mechanism is connected to a worm provided on a rotating shaft that can be rotated from the outside, a worm wheel that is rotated by the worm and has a rotating shaft, and a rotating shaft of the worm wheel. a central advancing/retracting mechanism that is linked to the movable central molding split inner mold and moves the central molding split inner mold forward or backward by rotation of the rotating shaft, and the central advancing/retracting mechanism is connected to the central molding split inner mold. A pendant body is provided hanging from the inner mold and is formed with a female thread having a vertical axis, and a pendant body is provided on the rotation shaft of the worm foil and is screwed into the female thread of the pendant body, and is suspended by rotation of the rotation shaft. It consists of a male screw that moves the body up and down.

In this case, it is effective to provide a guide mechanism for guiding the vertical movement of the hanging body. Since the hanging body is guided by the guide mechanism, the center molding split inner mold can be moved reliably without wobbling.

Furthermore, if necessary, a peripheral moving mechanism for moving the peripheral molding divided inner mold is provided, and when the peripheral molding divided inner mold moves, the peripheral molding divided inner mold is slightly lowered to move the bottom wall. The structure has a lowering function to separate it from the inner surface of the As a result, when the peripheral molding divided inner mold moves, the peripheral molding divided inner mold does not rub the inner surface of the bottom wall, and as a result, there is no resistance between it and the main body, so the peripheral molding divided inner mold can be smoothly separated. I am made to do so.

In addition, if necessary, a peripheral moving mechanism for moving the peripheral molding divided inner mold is provided, and the peripheral moving mechanism is rotated by a worm provided on a rotation shaft rotatable from the outside and rotated by the worm. A worm wheel having a shaft, and a link that is connected between the rotating shaft of the worm wheel and the movable divided inner mold for surrounding molding, and moves the divided inner mold for surrounding molding forward and backward by rotation of the rotary shaft. and a lowering mechanism, wherein a clearance is provided in the link connection of the peripheral advancing/retracting mechanism, and when the peripheral molding divided inner mold is moved, the peripheral molding divided inner mold is slightly lowered and separated from the inner surface of the bottom wall. It has a functional configuration. Thereby, it can be moved using a simple mechanism of a worm and a worm wheel.

According to the present invention, it is no longer necessary to use an intermediate body as in the conventional handhole, and it is possible to install a handhole with a full height that corresponds to the installation conditions. Furthermore, since there is no need to use intermediates, management becomes extremely easy and efficiency can be improved. Furthermore, the height of the cover can be reduced to facilitate handling. Furthermore, according to the handhole main body molding device, it is possible to mold main bodies of different heights, so it is possible to provide a handhole that does not require the use of an intermediate.

1 is a partially cutaway perspective view showing a hand hole according to a first embodiment of the present invention; FIG. FIG. 1 is an exploded perspective view showing a handhole according to a first embodiment of the present invention. FIG. 1 is a front view showing a handhole according to a first embodiment of the present invention. 1 shows a main body of a handhole according to a first embodiment of the present invention, in which (a) is a plan view and (b) is a partially cutaway front view. 1 shows a hand hole cover according to a first embodiment of the present invention, in which (a) is a plan view and (b) is a partially cutaway front view. 1 shows a cover ring for a hand hole according to a first embodiment of the present invention, in which (a) is a plan view and (b) is a partially cutaway front view. This is a table showing specific examples (Examples 1 to 10) of the hand hole according to the first embodiment of the present invention, listing the height dimension of the main body, the total height dimension of the hand hole, and other main dimensions of each part. be. FIG. 7 is a front view showing a hand hole according to a second embodiment of the present invention. A hand hole cover according to a second embodiment of the present invention is shown, with (a) being a plan view and (b) being a partially cutaway front view. This is a table showing specific examples (Examples 11 to 17) of the hand hole according to the second embodiment of the present invention, listing the height dimension of the main body, the total height dimension of the hand hole, and other main dimensions of each part. be. FIG. 1 is a perspective view showing a hand hole main body forming device according to an embodiment of the present invention. A hand hole main body forming apparatus according to an embodiment of the present invention is shown, in which (a) is a plan view showing the first and second fixed molds of the divided inner mold for forming the periphery of the inner mold, and (b) is a plan view of the inner mold. It is a front sectional view showing the first and second fixed molds and the end face mold of the peripheral molding split inner mold. A hand hole main body forming apparatus according to an embodiment of the present invention is shown, in which (a) is a plan view showing a split inner mold for forming the center of the inner mold, and (b) is a front view showing the split inner mold for forming the center of the inner mold. FIG. A hand hole main body forming apparatus according to an embodiment of the present invention is shown, in which (a) is a plan view showing a movable split inner mold for forming the periphery of the inner mold, and (b) is a plan view showing the movable split inner mold for forming the periphery of the inner mold. It is a front sectional view showing a movable type. FIG. 2 is an enlarged cross-sectional view of a main part showing a joined state of a central split inner mold and a peripheral split inner mold of the hand hole main body molding device according to the embodiment of the present invention. FIG. 2 is a plan view of essential parts showing a moving mechanism of the handhole main body forming device according to the embodiment of the present invention. FIG. 6 is a main part diagram showing another example of the height adjusting means in the hand hole main body forming apparatus according to the embodiment of the present invention. It is a sectional view showing an example of a conventional hand hole.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a hand hole and a hand hole main body forming apparatus according to an embodiment of the present invention will be described in detail based on the accompanying drawings.
1 to 7 show a hand hole T according to a first embodiment of the present invention. This hand hole T consists of a bottom wall 101 and a side wall 102 erected from the bottom wall 101, and includes a box-shaped main body 100 having an opening 103 facing upward when installed, and an opening on the opening 103 side of the main body 100. A cover 110 has a bonding surface 111 that is bonded to the end surface 104 and has a base opening 112 that covers the opening 103 and penetrates in the vertical direction by bonding the bonding surface 111 to the end surface 104; and a top surface 113 of the cover 110. A lid holder ring 120 has an attachment surface 121 to which the attachment surface 121 is attached, is attached to the cover 110 and has a lid opening 122 that is continuous to the base opening 112, and is attached to and detached from the upper surface 125 of the lid holder ring 120. The lid 130 is provided so that the lid 130 can close the lid opening 122 when installed. Note that although the lid 130 is illustrated in FIGS. 2 and 3, it is omitted in other drawings.

The main body 100 is integrally molded from concrete into a rectangular box shape having a rectangular parallelepiped-shaped recess 105. The open end surface 104 of the main body 100 includes a convex portion 106 that projects along the circumferential direction of the open port 103. Note that reference numeral 107 is a drain hole provided in the bottom wall 101, and reference numeral 108 is a corner portion of the side wall 102. In addition, the main body 100 has a dimension E of one side of the inner recess 105 when viewed from a plane, set to 750 mm<E≦1050 mm, and a maximum height from the lower surface of the bottom wall 101 to the open end surface 104. Ha is adjusted to be within the range of 400 mm≦Ha≦1800 mm. In the embodiment, for example, as shown in the table shown in FIG. 7 (Examples 1 to 10), 10 types are provided for every 100 mm in the range of E=900 mm and 690 mm≦Ha≦1590 mm. Other dimensions are set as shown in the table shown in FIG. The setting of the maximum height Ha is not limited to this, and it goes without saying that a desired maximum height Ha can be set, for example, in response to an order from a customer.

The cover 110 is integrally molded from concrete into a rectangular plate shape with a circular base opening 112 formed in the center and whose outer periphery is flush with the main body 100. The joint surface 111 of the cover 110 includes a recess 114 that fits into the projection 106 of the main body 100. Further, the top surface 113 of the cover 110 is configured to include a convex portion 115 that protrudes along the circumferential direction of the base opening 112. The cover 110 is formed such that the maximum height Hb (FIG. 5(b)) from the joint surface 111 to the top surface 113 is set to 50 mm≦Hb≦150 mm. In the embodiment, Hb is set to 120 mm.

The lid receiving ring 120 is molded from concrete into a ring shape with a circular lid opening 122 formed in the center. As shown in FIG. 6, the upper opening edge of the lid opening 122 of the lid receiving ring 120 is provided with a receiving frame 123 made of cast metal such as iron, with which the lid 130 engages. The attachment surface 121 of the lid receiving ring 120 includes a concave portion 124 that fits into the convex portion 115 of the cover 110. The lid receiving ring 120 is formed such that the maximum height Hc (FIG. 6(b)) from the attachment surface 121 to the upper surface 125 is set to 50 mm≦Hc≦150 mm. In the embodiment, Hc is set to 100 mm.

In addition, as shown in FIGS. 1 and 2, in the present hand hole T, a hole is inserted between the top surface 113 of the cover 110 and the attachment surface 121 of the lid receiving ring 120 as necessary. A spacer ring 140 is provided which has a communication hole 141 of the same size as the lid opening 122 and communicates with the lid opening 122. The spacer ring 140 is integrally molded from concrete into a ring shape whose outer periphery is flush with the lid receiving ring 120. The lower end surface of the spacer ring 140 is formed with a continuous recessed portion 142 having the same shape and size as the recessed portion 124 of the lid receiving ring 120, while the upper end surface of the spacer ring 140 is formed with a continuous recessed portion 142 that A continuous convex portion 143 having the same shape and size as the convex portion 115 is formed. The spacer ring 140 is formed with a maximum height Hd (FIG. 2) from its lower end surface to its upper end surface set to 50 mm≦Hd≦300 mm. In the embodiment, Hd is set to 100 mm. Note that although the spacer ring 140 is illustrated in FIGS. 1 and 2, it is omitted in other drawings.

In the hand hole T according to the first embodiment, for example, as shown in the table of FIG. There are 10 types for each. The setting of the total height H is not limited to this, and it goes without saying that it can correspond to a desired maximum height Ha in response to an order from a customer, for example. In short, the dimensions and types are not limited to these.

Next, a hand hole T according to a second embodiment of the present invention will be described. As shown in FIGS. 8 to 10, this hand hole T is formed almost in the same way as in the first embodiment, but the size of the main body 100 and the cover 110 are different, making it smaller. There is. Other configurations are the same.

Specifically, in the main body 100, the dimension E of one side of the inner recess 105 when viewed from a plane is set to 450 mm<E≦750 mm, and the maximum height from the lower surface of the bottom wall 101 to the open end surface 104 is set to 450 mm<E≦750 mm. The length Ha is adjusted to be within the range of 400 mm≦Ha≦1800 mm. In the embodiment, for example, seven types are provided for every 100 mm in the range of E=600 mm and 680 mm≦Ha≦1280 mm, as shown in the table shown in FIG. 10 (Examples 11 to 17). Other dimensions are set as shown in the table shown in FIG.

The cover 110 is molded into a rectangular plate shape having the same outer diameter as the cover ring 120 of the first embodiment when viewed from above and having one side protruding outward from the main body 100. has been done. The cover 110 is formed such that the maximum height Hb from the joint surface 111 to the top surface 113 is set to 50 mm≦Hb≦150 mm. In the embodiment, Hb is set to 110 mm.

In the hand hole T according to the second embodiment, for example, as shown in the table of FIG. There are 7 types for each. The setting of the total height H is not limited to this, and it goes without saying that it can correspond to a desired maximum height Ha in response to an order from a customer, for example. In short, the dimensions and types are not limited to these.

Next, a hand hole main body forming apparatus according to an embodiment of the present invention will be described. As shown in FIGS. 11 to 16, the basic configuration of the hand hole main body forming apparatus S according to the embodiment includes a support base 10 and an outer surface that is supported by the support base 10 and forms the outer surface 102a of the side wall 102. A mold 20, an inner mold 30 supported on the support base 10 and molding the inner surface 101b of the bottom wall 101 and the inner surface 102b of the side wall 102, and an inner mold 30 supported on the upper surface of the support base 10 and molding the open end surface 104 of the side wall 102. The main body 100 is molded with the bottom wall 101 facing upward.

As shown in FIGS. 11 and 12(b), the outer mold 20 is divided into a plurality of (four in the embodiment) divided outer molds 21 that mold four side walls 102, respectively. All or a part (all in the embodiment) of 21 can be moved to two positions: a molding position A and a separated position B spaced outward from the molding position A. Specifically, a pair of split outer molds 21 facing each other are movable via rolling rollers (not shown) on rails 22 provided on the support base 10, and the other pair of split outer molds facing each other are moved. 21 is attached to the support stand 10 via a hinge 23 so that it can be opened and closed, thereby making it movable. Reference numeral 24 is a workbench provided on the outside of the split outer mold 21 for a worker to sit on and work on.

The inner mold 30 is divided into a plurality of divided inner molds, and all or part (part in the embodiment) of each divided inner mold is separated from the molding position A and the inner mold by separating it inward from the molding position A. It is configured to be movable to two positions, including a separated position B that reduces the size of 30. As shown in FIG. 13, the plurality of split inner molds of the inner mold 30 include an octagonal plate-shaped center molding split inner mold 31 that molds the center part of the bottom wall 101 except for the outer peripheral part of the inner surface 101b of the bottom wall 101. and, as shown in FIGS. 12 to 14, a plurality of peripheral molding split inner molds 32 for molding the outer peripheral portion of the bottom wall 101 and the side wall 102 connected thereto. Each peripheral molding split inner mold 32 has an L-shaped cross section on its upper end side, and has a molding surface for molding the outer peripheral portion of the bottom wall 101 and a molding surface for molding the side wall 102. The central molding split inner mold 31 is provided on the support base 10 so as to be movable to two positions, a molding position A and a separated position B spaced inward from the molding position A, by a central moving mechanism 40 to be described later.

As shown in FIG. 14, the peripheral molding split inner mold 32 has a corner molding surface 33a for molding the three corner parts 108 of the side wall 102, and a bottom wall 101 formed in an arrow feather shape and connected to the corner part 108. Three movable dies 33 each having a corner forming surface 33b for forming a corner of the outer circumference, and a side wall forming surface 34a for forming two side walls 102 including one corner 108 as shown in FIG. A first fixed mold 34 having an outer circumference forming surface 34b that forms the outer circumference of the bottom wall 101 connected to the two side walls 102, and a side wall forming surface 35a that forms the other two side walls 102, respectively. and a pair of second fixed molds 35 each having an outer circumference forming surface 35b for forming the outer circumference of the bottom wall 101 connected to the two side walls 102, respectively.

As shown in FIG. 12, the lower end of the first fixed mold 34 is fixed to the support stand 10. The second fixed mold 35 is fixed to the support base 10 so as to be able to bend inward and outward from its lower end. The movable mold 33 is provided on the support base 10 so as to be movable to two positions, a molding position A and a separated position B spaced inward from the molding position A, by a peripheral movement mechanism 50, which will be described later.

Further, as shown in FIG. 15, the outer periphery of the central molding divided inner mold 31 is in contact with the inner edge 32a of the surrounding molding divided inner mold 32 at the molding position A of the central molding divided inner mold 31, and A presser portion 36 that presses down the mold 32 is provided. The inner end edge 32a of the peripheral molding split inner mold 32 is formed with a downwardly facing inclined surface, and the presser part 36 supports the inclined support surface 36a that supports this inclined surface and the lower side of the inner end. The lower support portion 36b is fixed to the outer periphery of the central molding split inner mold 31 by welding or the like. 37 is a packing provided on the inclined support surface 36a for sealing.

As shown in FIGS. 13 and 16, the central moving mechanism 40 for moving the central molding split inner mold 31 includes a worm 41 provided on a rotating shaft 42 that can be rotated by being operated from the lower outside of the end mold 60. and a worm wheel 44 which is rotated by the worm 41 and has a rotation shaft 43, and which is linked between the rotation shaft 43 of the worm wheel 44 and the movable central molding split inner mold 31, and which is rotated by the rotation shaft 43 to rotate the center. It is configured to include a central advancing/retracting mechanism 45 for advancing and retracting the molding divided inner mold 31. This central advancing/retracting mechanism 45 includes a hanging body 46 that is provided hanging down from the central molding split inner mold 31 and is formed with a female thread 46a having a vertical axis, and a hanging body 46 that is provided on the rotating shaft 43 of the worm wheel 44 and is hung down. It is comprised of a male screw 47 that is screwed into a female screw 46a of the body 46 and moves the hanging body 46 up and down by the rotation of the rotating shaft 43. A guide mechanism 48 guides the vertical movement of the hanging body 46, and is composed of a plurality of rollers that are provided on a fixing member 49 fixed to the first fixed mold 34 and roll on the hanging body 46.

As shown in FIGS. 13, 14 and 16, the periphery moving mechanism 50 for moving the movable mold 33 of the peripheral molding divided inner mold 32 has a rotating shaft that can be rotated by being operated from the outside of the lower side of the end mold 60. A worm 51 provided in the worm 52 , a worm wheel 54 which is rotated by the worm 51 and has a rotating shaft 53 , and a worm wheel 54 that is linked between the rotating shaft 53 of the worm wheel 54 and the movable mold 33 and is rotated by the rotation of the rotating shaft 53 . The movable mold 33 is configured to include a peripheral movement mechanism 55 consisting of a link that pushes and pulls the movable mold 33 to move it forward and backward. The rotation shaft 53 of the worm wheel 54 is installed between the support base 10 and the fixing member 49 via a bearing 56. As shown in FIG. 14(b), a clearance is provided in the link connection of the peripheral advancing/retracting mechanism 55, and when the movable die 33 is moved, the movable die 33 is slightly lowered to the inner surface 101b of the bottom wall 101. It is equipped with a lowering function to separate it from the

Further, in the hand hole main body forming apparatus S, the end face mold 60 is provided so as to be movable up and down with respect to the support base 10. A height adjustment means 70 is provided for moving the end mold 60 up and down to position it at a desired position and adjusting the maximum height Ha from the lower surface of the bottom wall 101 of the main body 100 to the open end surface 104. In the embodiment, the height adjustment means 70 includes a spacer 71 interposed between the upper surface of the support base 10 and the end mold 60. As the spacer 71, prepare multiple types of block-shaped ones with different heights, and select one according to the maximum height Ha of the main body 100, or select two or more and stack them. , and is used by being interposed between the support stand 10 and the end face mold 60. In this case, as shown in FIGS. 12 to 14, blocks having different heights can be stacked and used. Since it is a spacer, the structure can be simplified. Further, it is possible to correspond to a desired maximum height Ha in response to an order from a customer, for example, thereby improving versatility.

Therefore, when the main body 100 is molded using the hand hole main body molding apparatus S according to the embodiment of the present invention, it is performed as follows.
First, the end face mold is moved up and down by the height adjustment means 70 in accordance with the maximum height Ha of the main body 100 to position it at a desired position. In the embodiment, as shown in FIGS. 12 to 14, a spacer 71 is interposed between the support base 10 and the end mold 60 in accordance with the maximum height Ha of the main body 100.

Next, the peripheral movement mechanism 50 is activated to position the movable mold 33 at the molding position A. In this case, as shown in FIG. 14, when the worm 51 is rotated, the worm wheel 54 is rotated and the rotating shaft 53 is rotated, and the link of the peripheral advance/retreat mechanism 55 pushes the movable mold 33, so that the movable mold 33 is rotated. I am allowed to advance.

Next, the central moving mechanism 40 is operated again to position the central molding split inner mold 31 at the molding position A. In this case, as shown in FIG. 13(b), when the worm 41 is rotated, the worm wheel 44 is rotated, the rotating shaft 43 is rotated, and the hanging body 46 is moved upward, so that the central molding split inner mold 31 is advanced to the molding position A.

When the central molding split inner mold 31 advances to the molding position A, as shown in FIG. Since the molding divided inner mold 32 is held down, each divided inner mold is reliably positioned at the molding position A without wobbling.

Thereafter, as shown in FIG. 12, the outer mold 20 is positioned at the molding position A. In this state, reinforcing bars are inserted between the outer mold 20 and the inner mold 30 if necessary, and fluid concrete is poured from above. Then, after curing for the required time, the mold is removed.

When demolding, first, as shown in FIG. 13(b), the central moving mechanism 40 is operated to move the central molding divided inner mold 31 to the separated position B. In this case, when the worm 41 is rotated, the worm wheel 44 is rotated, the rotating shaft 43 is rotated, and the hanging body 46 is moved downward, so that the central molding divided inner mold 31 is retreated to the separated position B. In the central molding divided inner mold 31, the vertical movement of the hanging body 46 is guided by the guide mechanism 48, so that the central molding divided inner mold 31 can be reliably moved without wobbling.

Next, as shown in FIG. 14, the surrounding movement mechanism 50 is activated to move the movable mold 33 to the separated position B. Then, as shown in FIG. In this case, when the worm 51 is rotated, the worm wheel 54 is rotated, the rotating shaft 53 is rotated, and the link of the peripheral advance/retreat mechanism 55 pulls the movable mold 33, so that the movable mold 33 is moved backward. At this time, a clearance is provided in the link connection of the peripheral advancing/retracting mechanism 55, and when the movable mold 33 is moved, the movable mold 33 is slightly lowered, so that the inner surface 101b of the bottom wall 101 is not rubbed. Therefore, since there is no resistance between the main body and the main body, it can be smoothly separated. Further, since the central molding divided inner mold 31 is moved to the separated position B, and then the surrounding molding divided inner mold 32 is moved, the divided inner molds can be moved to the separated position B so that the divided inner molds do not interfere with each other.

Thereafter, as shown in FIG. 11, the outer mold 20 is moved to the separated position B, and in this state, the main body 100 is pulled up with a crane or the like. In this case, since the central molding split inner mold 31 and the movable mold 33 are spaced apart from the bottom wall 101, the inner mold 30 is reduced in size, so that demolding can be performed easily. The main body 100 is easily taken out. At this time, the second fixed mold 35 is fixed to the support base 10, but can be bent inward and outward using its lower end as a base point. There is almost no frictional resistance between the body 100 and the body 100, so demolding can be carried out even more smoothly, and the body 100 can be easily taken out. Further, since the movable mold 33 is separated from the corner portion 108 of the side wall 102, the portion where the frictional resistance is high is moved back, so that demolding can be performed without difficulty and the main body 100 can be easily taken out.

The main body 100 formed in this manner can be taken out by reducing the inner mold 30, so that the side wall 102 is formed straight and the thickness of the side wall 102 is constant. Therefore, waste of concrete material is prevented compared to the case where a slope is provided for cutting. Further, it is no longer necessary to consider the difference in the thickness of the side wall 102 during construction design, construction, etc., making calculations easier, and improving construction design and construction efficiency. For example, when making a hole in the side wall 102 and fitting a conduit into the hole for connection, the thickness of the side wall 102 is the same everywhere, even if the connection position is different, so the length of the conduit can be set and cut. The surface can also be made constant, greatly improving construction design and construction efficiency.

Furthermore, the height of the main body 100 formed in this way is adjusted by the height adjusting means 70 according to the maximum height Ha of the main body 100, so that the bottom can be adjusted according to the total height of the hand hole T, for example. The maximum height Ha from the lower surface of the wall 101 to the open end surface 104 can be adjusted to fall within the range of 400 mm≦Ha≦1800 mm. As a result, it is possible to obtain a plurality of types of hand holes T, for example, with a total height H in the range of 500 mm≦H≦2100 mm (see FIGS. 7 and 10). Therefore, when installing the hand hole T, , unlike in the past, there is no need to use an intermediate body, and the hand hole T can be installed with a full height that corresponds to the installation conditions. Since there is no need to use intermediates as in conventional methods, management becomes extremely easy and efficiency can be improved. Further, since the maximum height Hb from the joint surface 111 to the top surface 113 of the cover 110 is 50 mm≦Hb≦150 mm, the cover 110 is lower than the conventional cover, and the cover 110 becomes smaller and easier to handle.

Furthermore, in the state where the hand hole T is installed, as shown in FIG. are connected by fitting the convex portion 115 and the concave portion 124, so that positioning is ensured and there is no horizontal displacement from each other, making it possible to stabilize the installation.

Furthermore, when installing the hand hole T, the height position of the lid receiving ring 120 relative to the ground can be finely adjusted using the spacer ring 140, as shown in FIGS. 1 and 2. Therefore, installation accuracy can be improved. Because the spacer ring 140 is small, its molding is easier compared to conventional intermediates. Further, the cover 110 and the spacer ring 140 are connected by fitting the convex part 115 and the continuous concave part 142 into each other, and the spacer ring 140 and the lid receiving ring 120 are connected to each other by fitting the convex part 115 and the continuous concave part 142 together. Since the parts 124 are connected by fitting together, positioning is ensured and there is no horizontal displacement from each other, making it possible to stabilize the installation. Note that the spacer ring 140 can also be provided in multiple stages.

FIG. 17 shows another example of the height adjusting means 70 in the hand hole main body forming apparatus S according to the embodiment. In this case, the height adjustment means 70 is constituted by a well-known mechanical jack 72 interposed between the support base 10 and the end mold 60. The end mold 60 is raised and lowered by a jack 72 according to the maximum height Ha of the main body 100. Operability can be improved. Note that a well-known hydraulic type jack can also be used.

Note that the settings of the maximum height Ha and the overall height H of the main body 100 are not limited to the settings of each embodiment shown in FIGS. It may be changed as appropriate depending on the size of Ha. Further, in the above embodiment, the height adjustment means 70 is configured with the spacer 71 and the mechanical jack 72, but it is not necessarily limited to this, and for example, a hydraulic jack may be used as appropriate. You can change it. Further, in the above embodiment, the present invention is applied to the hand hole T having the main body 100 consisting of the rectangular bottom wall 101 and four side walls 102, but it is not necessarily limited to this, and for example, It is applicable to a hand hole that has a main body with a side wall erected on a polygonal bottom wall such as a hexagon or octagon, or a hand hole that has a main body that has a cylindrical side wall erected on a circular bottom wall. You may change it as appropriate. The invention is not limited to the embodiments of the invention described above, and those skilled in the art will be able to make many changes to these exemplary embodiments without departing substantially from the novel teachings and advantages of the invention. Many of these modifications are within the scope of the present invention.

T Hand hole 100 Main body 101 Bottom wall 101b Inner surface 102 Side wall 102a Outer surface 102b Inner surface 103 Opening port 104 Opening end surface 105 Recess 106 Convex portion 107 Drain hole 108 Corner portion 110 Cover 111 Joint surface 112 Base opening 113 Top Surface 114 Concave portion 115 Convex portion 120 Lid receiving ring 121 Adhesive surface 122 Lid opening 123 Receiving frame 124 Concave portion 125 Top surface 130 Lid 140 Spacer ring 141 Communication hole 142 Continuous concave portion 143 Continuous convex portion S For main body of hand hole Molding device 10 Support stand A Molding position B Separated position 20 Outer mold 21 Split outer mold 30 Inner mold 31 Center molding divided inner mold 32 Surrounding molding divided inner mold 32a Inner edge 33 Movable mold 33a Corner molding surface 33b Corner molding surface 34 First fixed mold 34a Side wall molding surface 34b Outer peripheral molding surface 35 Second fixed mold 35a Side wall molding surface 35b Outer peripheral molding surface 36 Holding section 40 Central moving mechanism 41 Worm 42 Rotating shaft 43 Rotating shaft 44 Worm wheel 45 Central advance/retreat mechanism 46 Suspending body 46a Female thread 47 Male thread 48 Guide mechanism 49 Fixed member 50 Peripheral movement mechanism 51 Worm 52 Rotating shaft 53 Rotating shaft 54 Worm foil 55 Peripheral advance/retreat mechanism 60 End mold 70 Height adjustment means 71 Spacer 72 Jack

Claims (16)

A box-shaped main body consisting of a bottom wall and a side wall erected on the bottom wall and having an open mouth facing upward when installed, and a joint surface that is joined to the open end face of the main body on the open mouth side. The cover has a base opening that covers the open opening by joining the bonding surfaces and penetrates in the vertical direction, and an attachment surface that is attached to the top surface of the cover, and the attachment surface is attached to the cover. A handhole comprising a lid receiving ring that is attached to a body and has a lid opening that is continuous with the base opening, and a lid that is removably provided on the upper surface of the lid receiving ring and closes the lid opening when worn,
The main body is integrally molded with concrete, and the maximum height Ha from the lower surface of the bottom wall to the end surface of the open opening is adjusted in the range of 400 mm≦Ha≦1800 mm,
The cover is integrally molded with concrete, and the maximum height Hb from the joint surface to the top surface is set to 50 mm≦Hb≦150 mm,
A handhole characterized in that the lid receiving ring is integrally molded with concrete, and the maximum height Hc from the attachment surface to the upper surface is set to 50 mm≦Hc≦150 mm. The open mouth end surface of the main body is configured with a convex portion that projects along the circumferential direction of the open mouth,
The joint surface of the cover is configured with a recess that fits into the convex part,
The top surface of the cover includes a convex portion projecting along the circumferential direction of the base opening,
2. The handhole according to claim 1, wherein the attachment surface of the lid receiving ring includes a concave portion that fits into the convex portion. A spacer ring is provided between the top surface of the cover and the attachment surface of the lid receiving ring, if necessary, and has a communication hole that communicates with the lid opening;
The lower end face of the spacer ring is formed with a continuous concave part having the same shape and size as the concave part of the lid receiving ring, and the upper end face of the spacer ring is formed with the same convex part as the convex part of the cover. Formed with continuous convex portions of the same size and shape,
3. The hand according to claim 2, wherein the space ring is integrally molded with concrete, and the maximum height Hd from the lower end surface to the upper end surface is set to 50 mm≦Hd≦300 mm. hole. The main body of a hand hole is formed by exposing the lower surface of the bottom wall upward, and has a box-shaped main body consisting of a bottom wall and a side wall erected on the bottom wall, and having an open opening facing upward when installed. In the molding device for the main body of the hand hole,
a support base, an outer mold supported by the support base and molding the outer surface of the side wall, an inner mold supported by the support base molding the inner surface of the bottom wall and the inner surface of the side wall, and the support base an end face mold that is supported and forms an open end face of the side wall;
The outer mold is divided into a plurality of divided outer molds, and all or part of each divided outer mold is movable to two positions: a molding position and a separate position spaced outward from the molding position,
The above-mentioned inner mold is divided into a plurality of divided inner molds, and all or part of each divided inner mold is moved to two positions: a molding position and a separation position where the inner mold is moved inward from the molding position to reduce the size of the inner mold. enable,
Height adjustment means for providing the end mold movable up and down, moving the end mold up and down to position it at a desired position, and adjusting the maximum height Ha from the lower surface of the bottom wall of the main body to the end surface of the open opening. A molding device for the main body of a hand hole, characterized by comprising: 5. The hand hole main body molding apparatus according to claim 4, wherein said height adjusting means is constituted by a spacer interposed between said support base and said end face mold. 5. The hand hole main body molding apparatus according to claim 4, wherein said height adjusting means comprises a jack interposed between said support base and said end face mold. The plurality of split inner molds of the above inner mold are used to form a central split inner mold that molds the center part of the bottom wall excluding the outer periphery of the bottom wall, and a central split inner mold that molds the outer periphery of the bottom wall and the side walls connected thereto. and a plurality of peripheral molding split inner molds,
The central molding split inner mold is movable to two positions: the molding position and a spaced position spaced inward from the molding position,
The method is characterized in that all or part of the peripheral molding divided inner mold can be moved to two positions: the molding position and a spaced position spaced inward from the molding position at the separated position of the central molding divided inner mold. A hand hole main body forming device according to any one of claims 4 to 6. In a hand hole body molding device for molding a body consisting of a polygonal bottom wall and a side wall standing upright on the bottom wall and having corner portions formed on the side wall, with the bottom wall facing upward,
8. Molding for a main body of a hand hole according to claim 7, wherein the movable peripheral molding divided inner mold of the peripheral molding divided inner mold is provided with a corner molding surface for molding a corner portion of the side wall. Device. Claim characterized in that a presser portion is provided on the outer periphery of the central molding divided inner mold, and presses the peripheral molding divided inner mold by coming into contact with the inside of the peripheral molding divided inner mold at the molding position of the central molding divided inner mold. 8. The hand hole main body forming device according to 8. 8. The hand hole main body molding apparatus according to claim 7, further comprising a moving mechanism for moving the movable split inner mold. The moving mechanism includes a worm provided on a rotating shaft that can be rotated from the outside, a worm wheel that is rotated by the worm and has a rotating shaft, and a rotating shaft of the worm wheel and the movable division. 11. The handhole main body molding device according to claim 10, further comprising an advancing and retracting mechanism that is linked to the mold and moves the divided inner mold forward and backward by rotation of the rotating shaft. 8. The hand hole main body molding apparatus according to claim 7, further comprising a central moving mechanism for moving said central molding split inner mold. The central moving mechanism includes a worm provided on a rotating shaft that can be rotated from the outside, a worm wheel that is rotated by the worm and has a rotating shaft, and a rotating shaft of the worm foil and the movable central mold. and a central advancing/retracting mechanism that is linked to the divided inner mold and moves the central molding divided inner mold forward and backward by rotation of the rotating shaft, and the central advancing/retracting mechanism is suspended from the central molding divided inner mold. a pendant body formed with a female thread having a vertical axis; and a male thread provided on the rotation shaft of the worm foil and screwed into the female thread of the pendant body to move the pendant body up and down by rotation of the rotation shaft. 13. The hand hole main body forming apparatus according to claim 12, wherein the hand hole main body forming apparatus comprises: 14. The handhole main body forming apparatus according to claim 13, further comprising a guide mechanism for guiding vertical movement of said hanging body. A peripheral moving mechanism for moving the peripheral molding divided inner mold is provided, and the peripheral moving mechanism is configured to slightly lower the peripheral molding divided inner mold and separate it from the inner surface of the bottom wall when the peripheral molding divided inner mold moves. 8. The handhole main body forming device according to claim 7, further comprising a lowering function. The peripheral moving mechanism is provided with a peripheral moving mechanism for moving the peripheral molding divided inner mold, and the peripheral moving mechanism is connected to a worm provided on a rotating shaft that can be rotated from the outside, and a worm wheel that is rotated by the worm and has a rotating shaft. and a periphery advancing/retracting mechanism consisting of a link linked between the rotating shaft of the worm wheel and the movable surrounding molding divided inner mold and moving the surrounding molding divided inner mold forward and backward by rotation of the rotary shaft. and a lowering function is provided in which a clearance is provided in the link connection of the peripheral advancing/retracting mechanism to slightly lower the peripheral molding divided inner mold and separate it from the inner surface of the bottom wall when the peripheral molding divided inner mold moves. The hand hole main body forming device according to claim 15.

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