JP4384257B1 - Outer material holding member and outer material - Google Patents

Abstract

An object of the present invention is to provide a low-cost configuration capable of forming openings of various shapes in a floor slab.
A plurality of outer skin material holding members 10 are connected in a horizontal and vertical direction so as to form a connection body that can be held in a state in which a bent sleeve material is wound around. The skin material holding member 10 includes four side plates 12 to 15 and a rectangular bottom plate 11. The bottom plate 11 is disposed so as to be substantially perpendicular to the side plates 12 to 15. Each of the four side plates 12 to 15 is configured to connect at right angles to the adjacent side plates. Each of the side plates 12 to 15 is formed with an insertion groove 16 into which a screw rod can be inserted.
[Selection] Figure 1

Description

  The present invention relates to a technique for forming an opening for passing piping or the like through a concrete structure (for example, a concrete slab).

  In construction work, it has been widely practiced to form a composite slab by placing concrete on a corrugated steel plate (deck plate). And various opening part formation tools are used in order to form the opening part for penetrating piping etc. in concrete slab.

  This type of forming tool is disclosed in Patent Document 1, for example. In this opening forming tool of Patent Document 1, a forming tool body in which a comb-like body provided with a plurality of slide bars capable of moving up and down is attached to a support piece suspended from a substrate in a rectangular shape, and adjacent forming tools. The main body is configured to be detachable from each other.

  Patent Document 2 discloses a form for forming a floor through opening for providing a floor through rectangular opening on the floor. This formwork is provided with a side plate that forms four surrounding surfaces, and plastic corrugated cardboard is affixed to the periphery with double-sided tape or the like.

  Moreover, although patent document 3 is not used for a floor slab, it discloses the die cutting sleeve for penetrating a concrete underground beam or a partition wall to form a hole for piping. In this die-cut sleeve, a sleeve cylinder in which a single corrugated plate is formed into a cylindrical shape is used. This single corrugated plate is configured such that a corrugated plate formed by forming a continuous trapezoidal cross section having a constant pitch is bonded to one side of a flat plate. Inside the sleeve cylinder, several discs or square plates having the pitch of the wave portions of the corrugated plate as the pitch of the cutting edge are arranged.

Noto 3029055 gazette JP-A-2005-139652 Japanese Utility Model Publication No. 61-2014439

  However, the opening forming tool of Patent Document 1 has a complicated configuration using a large number of parts, and there is room for improvement from the viewpoint of reducing manufacturing costs. In any of Patent Documents 1 to 3, it is difficult to flexibly change the shape of the opening to be formed, and the versatility is not sufficient.

  This invention is made in view of the above situation, The objective is to provide the low-cost structure which can form the opening part of various shapes in a floor slab.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

According to a first aspect of the present invention, a skin material holding member having the following configuration is provided. In other words, the outer skin material holding member is connected in a horizontal direction vertically and horizontally, thereby connecting the outer shell material for forming the opening in the concrete structure in a state of being wound around the periphery. Can be configured. The skin material holding member includes four side plates and a rectangular base plate. The base plate is disposed so as to be substantially perpendicular to the side plate. Each of the four side plates is configured to connect at right angles to the adjacent side plates. Each of the side plates is formed with an insertion groove into which a rod-shaped member can be inserted.

  Thereby, the opening part of various shapes can be flexibly formed by the variation of the vertical / horizontal connection of the outer skin material holding member. Moreover, since it is a simple connection structure using an insertion groove and a rod-shaped member, cost can be reduced.

  The outer skin material holding member preferably has the following configuration. That is, each of the insertion grooves has two recesses that can hold the rod-shaped member. In the same insertion groove, the two recesses are arranged at different heights.

  Thereby, the bar-shaped member for connecting the outer skin material holding member in the vertical direction and the bar-shaped member for connecting in the horizontal direction can be arranged at different heights. Therefore, it is possible to prevent interference from occurring at the intersection between the rod-shaped members.

  In the outer skin holding member, the insertion groove includes a central groove that opens an upper end, a first recess that branches from the central groove to one side and extends in a horizontal or oblique direction, and from the central groove to the other side. It is preferable to have a second recess that is bent and extends in a horizontal or oblique direction.

  Thereby, the structure for preventing interference between rod-shaped members can be realized without complicating the shape of the insertion groove.

  The outer skin material holding member preferably has the following configuration. That is, the insertion groove has an asymmetric shape. The base plate is formed with a direction indicator that indicates the direction of the outer skin holding member.

  Thereby, it is easy to confirm whether or not the direction of the skin material holding member is aligned (that is, whether the insertion groove is in a position corresponding to each other in the adjacent skin material holding member) by looking at the base plate from above. It is.

  In the outer skin material holding member, it is preferable that the direction display unit is a face display.

  Thereby, since the direction of the outer skin holding member can be known at a glance, workability is good.

  The outer skin material holding member is preferably configured to be connectable to other outer skin material holding members in the vertical direction.

  Thereby, even when the thickness of the target concrete structure is large, a deep opening can be appropriately formed.

  The outer skin material holding member preferably has the following configuration. That is, the insertion groove has a holding recess for holding the rod-shaped member. When a plurality of skin material holding members are connected in the vertical direction, one skin material holding member is configured to close the open end of the insertion groove in the other skin material holding member and at least not hold the holding recess. Has been.

  Thereby, when the outer skin material holding member is connected in the vertical direction, it is possible to prevent the bar-like member connecting the lower skin material holding members and the upper skin material holding member from interfering with each other.

  According to the 2nd viewpoint of this invention, the skin material of the following structures wound around the connection body comprised by connecting the said skin material holding | maintenance member horizontally and vertically is provided. That is, the outer skin material includes a first sheet formed into a wave shape and a flat second sheet. The second sheet is bonded only to one surface of the first sheet. And the said skin | wrapping material is wound around the said connection body in the state which orient | assigned the said 2nd sheet | seat to the outer side.

  As a result, it is possible to realize a skin material that has good mechanical strength and is easily bent. Therefore, it can withstand the pressure at the time of concrete pouring well, and at the same time can be arranged along the contour of the connected body. Further, since the flat second sheet is directed outward, the outer skin material can be easily peeled off from the inner wall of the opening after the opening is formed.

The perspective view which shows the whole structure of the outer skin material holding member which concerns on one Embodiment of this invention. The top view of an outer skin material holding member. The assembly perspective view which shows the operation | work which connects an outer_layer | skin material holding member horizontally and vertically. The top view which shows a mode that the outer skin material holding member was arranged in the horizontal and vertical direction. The perspective view which shows the operation | work which installs the coupling body of an outer_layer | skin material holding member on a deck plate. The perspective view which shows a mode that the outer covering material was wound around the connection body of the outer covering material holding member. The perspective view which shows a mode that the outer skin material holding member was connected to the perpendicular direction.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an overall configuration of a skin material holding member 10 according to an embodiment of the present invention. FIG. 2 is a plan view of the skin material holding member 10. FIG. 3 is an assembly perspective view showing the operation of connecting the skin material holding member 10 vertically and horizontally. FIG. 4 is a plan view showing a state in which the skin material holding members 10 are arranged vertically and horizontally in the horizontal direction.

  The skin material holding member 10 shown in FIG. 1 and the like is formed by placing concrete on the upper side of a deck plate (corrugated steel plate) as a floor mold material to form a floor slab (concrete slab). Used to form shaped openings. The skin material holding member 10 is formed in a box shape (cubic shape) with an upper portion opened using a synthetic resin.

  The skin material holding member 10 includes a rectangular (square) bottom plate (base plate) 11 and four side plates 12, 13, 14, and 15 raised from four sides of the bottom plate 11. Adjacent side plates are vertically connected to each other. The side plates 12 to 15 are connected to the bottom plate 11 perpendicularly.

  A step portion 20 is formed in the lower portion of each side plate 12-15. A connecting portion 21 is formed at a portion below the stepped portion 20, and the contour of the connecting portion 21 is slightly smaller than the inner contour of the upper edge (open portion) of the skin material holding member 10. Yes. Therefore, the plurality of skin material holding members 10 can be connected in the vertical direction by inserting the connecting portion 21 of the skin material holding member 10 into the open portion of the other skin material holding member 10 from above.

  Insertion grooves 16 are formed in the respective side plates 12 to 15. This insertion groove 16 is formed in the upper part of the side plates 12-15 so that the upper end may be open | released. As shown in FIG. 1, in the side plates facing each other (side plate 12 and side plate 14, side plate 13 and side plate 15), the insertion grooves 16 are configured to correspond to each other in position and shape.

  Hereinafter, the insertion groove 16 will be described. Note that the insertion grooves 16 of the side plates 12 to 15 have the same shape or have the left and right directions reversed, and therefore, in the following description, the insertion grooves 16 formed on the side plates 12 are representative. I will explain.

  The insertion groove 16 includes a vertical groove (center groove) 18 formed in the vertical direction in the center of the side plate 12, a first horizontal groove (first recess, holding recess) 19a connected to the lower end of the vertical groove 18, A second horizontal groove (second concave portion, holding concave portion) 19b connected to the middle portion of the vertical groove 18 is formed.

  The vertical groove 18 is formed so that its upper end is opened at the upper edge of the side plate 12 and linearly extends downward. The first horizontal groove 19a and the second horizontal groove 19b are formed so as to extend from the vertical groove 18 in the horizontal direction.

  Note that the extending directions of the first horizontal groove 19a and the second horizontal groove 19b are opposite to each other (in other words, the second horizontal groove 19b is disposed on the opposite side of the first horizontal groove 19a with the vertical groove 18 in between). Have been). The first horizontal groove 19a and the second horizontal groove 19b are arranged so that their heights are different from each other. Therefore, the shape of the insertion groove 16 is asymmetric on the left and right.

  As shown in FIG. 2 which is a plan view, a plurality of mounting holes 22 are formed in the bottom plate 11 so as to penetrate therethrough. The attachment hole 22 is formed as a long hole having an arc shape or a straight line shape, and is arranged at an appropriate position so as to express the design of the face that a human laughs as a whole. Thus, in this embodiment, the direction display part 23 which shows direction (in the direction of a face) of the skin material holding member 10 by the some attachment hole 22 is comprised.

  Next, the operation | work which connects the outer skin material holding member 10 vertically and horizontally is demonstrated. First, on the flat work table or the like, the skin material holding members 10 having the same shape are arranged vertically and horizontally in accordance with the shape and size of the opening to be formed in the floor slab. FIG. 3 shows an example in which 3 × 2 outer shell material holding members 10 are arranged in a rectangular shape, but the arrangement method is arbitrary. For example, they are arranged in a T shape or in a cross shape. be able to.

  In the present embodiment, the dimension of the skin material holding member 10 is 100 mm × 100 mm in plan view. As described above, the outer skin material holding member 10 is configured with a good size, so it can be easily calculated how many outer skin material holding members 10 should be arranged according to the size of the opening to be formed. is there.

  The plurality of outer skin material holding members 10 are all arranged in the same direction. As a result, the positions of the first horizontal groove 19a and the second horizontal groove 19b coincide with each other between the adjacent skin material holding members 10, so that the screw rods 31 described later are moved to the first horizontal groove 19a or the second horizontal groove 19b (multiple Can be inserted over the outer skin holding member 10.

  Whether or not the direction of the skin material holding member 10 is aligned is determined by whether or not the direction of the face (direction display portion 23) is the same as shown in FIG. It can be easily confirmed. Further, when arranging the skin material holding members 10, the positions of the skin material holding members 10 are set so that the insertion grooves 16 formed in the side plates 12 to 15 coincide with each other in the adjacent skin material holding members 10. Try to align.

  Next, screw rods 31 of an appropriate length are prepared as shown in FIG. 3, and two or four nuts 32 and washers 33 are attached to the screw rods 31. The threaded rod 31 is a so-called “dimension” long bolt, which is widely used at construction sites and can be easily obtained, and can be used after being cut to a desired length. .

  Then, the screw rod 31 is inserted into the insertion groove 16 formed in the side plates 12 to 15 in a horizontal orientation, and the screw rod 31 is held in the first horizontal groove 19a or the second horizontal groove 19b. At this time, the side plates (side plate 13 and side plate 15 or side plate 12 and side plate 14) adjacent to each other in the skin material holding member 10 are inserted between the washers 33 arranged in pairs.

  Then, the side plates adjacent to each other (the side plate 13 and the side plate 15 or the side plate 12 and the side plate 14) are tightened by rotating the nut 32 disposed outside the washer 33. Thereby, the plurality of skin material holding members 10 can be coupled in the direction of the screw rod 31.

  In FIG. 3, only one screw rod 31 is shown vertically and horizontally, but as shown in FIG. 5, the screw rods 31 are actually attached two vertically and horizontally. Thereby, the outer skin material holding member coupling body 35 in which a total of six outer skin material holding members 10 are vertically and horizontally connected in the horizontal direction is configured.

  The screw rod 31 that vertically connects the skin material holding member 10 is disposed in the first horizontal groove 19 a of the insertion groove 16, and the screw rod 31 that is horizontally coupled is disposed in the second horizontal groove 19 b of the insertion groove 16. . Thus, by arranging the vertical and horizontal screw rods 31 in the two horizontal grooves 19a and 19b formed at different heights, the screw rods 31 can be prevented from interfering with each other at the intersection.

  Next, the outer skin material holding member coupling body 35 assembled as described above is arranged on the deck plate 50 as shown in FIG. The drill screw 41 is fixed to the deck plate 50 after being inserted into the mounting hole 22 formed in the bottom plate 11.

  The deck plate 50 is formed in a wave shape having elongated protrusions and recesses. However, when it is desired to form a through-hole extending over the boundary between the protrusions and the recesses, the deck plate 50 is formed flat as shown in FIG. Only the outer skin material holding member 10 in contact with the upper surface of the convex portion may be fixed with the drill screw 41. Although the skin material holding member 10 on the concave portion is in a floating state, the plurality of skin material holding members 10 are connected by the screw rods 31, so that their positions can be held.

  Next, as shown in FIG. 6, a bent sleeve material (outer skin material) 46 is wound around the outer skin material holding member coupling body 35. As shown in FIG. 6, the bent sleeve material 46 has a configuration in which a flat second sheet 48 is fixed (bonded) only to one surface of the corrugated first sheet 47, and has good mechanical strength. Have. Many elongated cavities are formed side by side between the first sheet 47 and the second sheet 48.

  The bent sleeve material 46 is formed of a synthetic resin such as polypropylene, and can be cut into a desired shape by using a scissors, a cutter knife, or the like. Therefore, it is easy to form the contour of the lower edge portion of the bent sleeve material 46 corresponding to the unevenness of the deck plate 50.

  Moreover, both the sheets 47 and 48 are configured to be appropriately flexible with a synthetic resin, and the portion where the first sheet 47 and the second sheet 48 are joined can be favorably bent. In addition, since the first sheet 47 and the second sheet 48 are joined at a number of locations, the skin material holding member connector 35 is disposed by arranging the bent sleeve material 46 so that the elongated cavity is vertically oriented. It can be bent so as to follow the corners of the lens well.

  Finally, the adhesive tape 43 is applied to the joint portion 42 of the bent sleeve material 46 to connect the ends thereof, and ready-mixed concrete is placed on the deck plate 50 in this state. In addition, since the bending sleeve material 46 can be easily cut as described above, the lower end of the bent sleeve material 46 is allowed to follow the concave-convex shape of the deck plate 50 without any gap, thereby preventing leakage of concrete.

  After the concrete is solidified, an opening can be formed in the concrete portion by removing the outer skin material holding member connector 35, the bent sleeve material 46, the screw rod 31, and the like. In addition, since the bending sleeve material 46 is arrange | positioned so that the flat 2nd sheet | seat 48 may face the outer side, an unevenness | corrugation does not arise in a boundary with concrete. Therefore, the bent sleeve material 46 can be easily peeled off from the inner surface of the opening.

  The detached outer skin material holding member coupling body 35 (outer skin material holding member 10), screw rod 31, bent sleeve material 46, etc. can be used repeatedly in principle. Therefore, it is economical and can reduce the environmental load.

  In addition, when the thickness of the target floor slab is large, as shown in FIG. 7, it can be set as the multistage outer skin material holding member coupling body 35x which connected the outer skin material holding member 10 to the up-down direction. In this case, since the bent sleeve material 46 can be held in a wider area, an opening with good shape accuracy can be formed in the concrete.

  In addition, the dimension of the up-down direction of the connection part 21 (FIG. 1) formed in the lower part of the outer skin material holding member 10 is when the said connection part 21 is inserted into the open part of the other outer skin material holding member 10 from the upper side. Although the upper part of the vertical groove 18 (the open end of the insertion groove 16) is closed, the first horizontal groove 19a and the second horizontal groove 19b are appropriately set so as not to close. Thereby, when the other skin material holding member 10 is connected to the upper side of the skin material holding member 10 which is connected vertically and horizontally by the screw rod 31, the already installed screw rod 31 does not get in the way.

  As described above, the outer skin material holding member 10 according to the present embodiment is connected in a state in which the bent sleeve material 46 is wound around the periphery by connecting a plurality of the skin material holding members 10 in the horizontal direction. A skin material holding member coupling body 35) can be formed. The skin material holding member 10 includes four side plates 12 to 15 and a rectangular bottom plate 11. The bottom plate 11 is disposed so as to be substantially perpendicular to the side plates 12 to 15. Each of the four side plates 12 to 15 is configured to connect at right angles to the adjacent side plates. Each of the side plates 12 to 15 is formed with an insertion groove 16 into which the screw rod 31 can be inserted.

  Thereby, the opening part of various shapes can be flexibly formed by the variation of the vertical / horizontal connection of the skin material holding member 10. Moreover, since it is a simple connection structure using the insertion groove | channel 16 and the screw rod 31, cost can be reduced.

  Further, in the skin material holding member 10 of the present embodiment, each insertion groove 16 has a first horizontal groove 19 a and a second horizontal groove 19 b that can hold the screw rod 31. In the same insertion groove 16, the first horizontal groove 19a and the second horizontal groove 19b are arranged at different heights.

  Thereby, the screw rod 31 for connecting the outer skin material holding member 10 in the vertical direction and the screw rod 31 for connecting in the horizontal direction can be arranged at different heights. Accordingly, it is possible to prevent interference from occurring at the intersection between the screw rods 31.

  Further, in the skin material holding member 10 of the present embodiment, the insertion groove 16 includes a vertical groove 18 that opens an upper end, a first horizontal groove 19a that branches from the vertical groove 18 to one side and extends in the horizontal direction, and a vertical groove. A second horizontal groove 19b that bends from the groove 18 to the other side and extends in the horizontal direction.

  Thereby, the structure for preventing interference between the screw rods 31 can be realized without complicating the shape of the insertion groove 16.

  Further, in the skin material holding member 10 of the present embodiment, the insertion groove 16 has an asymmetric shape, and the bottom plate 11 is formed with a direction indicator 23 indicating the direction of the skin material holding member 10.

  Accordingly, by looking at the bottom plate 11 from above, whether or not the direction of the outer skin material holding member 10 is aligned (that is, whether the insertion grooves 16 are in positions corresponding to each other in the adjacent outer skin material holding member 10). Confirmation is easy.

  Further, in the skin material holding member 10 of the present embodiment, the direction display unit 23 is a face display.

  Thereby, since the direction of the skin material holding member 10 can be known at a glance, workability is good.

  Further, the skin material holding member 10 of the present embodiment is configured to be connectable to the other skin material holding members 10 in the vertical direction.

  Thereby, even when the thickness of the floor slab is large, the deep opening can be appropriately formed.

  Further, in the outer skin material holding member 10 of the present embodiment, the insertion groove 16 has a first horizontal groove 19 a and a second horizontal groove 19 b that hold the screw rod 31. When the plurality of skin material holding members 10 are connected in the vertical direction, the connecting portion 21 of one skin material holding member 10 closes the open end of the insertion groove 16 in the other skin material holding member 10, and at least The first horizontal groove 19a and the second horizontal groove 19b are configured not to close.

  Thereby, when the outer skin material holding member 10 is connected in the vertical direction, the screw rod 31 connecting the lower outer skin material holding members 10 and the connecting portion 21 of the upper outer skin material holding member 10 interfere with each other. Can be prevented.

  In addition, the bent sleeve material 46 wound around the outer skin material holding member coupling body 35 configured by connecting the outer skin material holding member 10 of the present embodiment includes a first sheet 47 formed in a wave shape and a flat second material. A sheet 48. The second sheet 48 is bonded only to one surface of the first sheet 47. Then, the bent sleeve material 46 is wound around the outer skin material holding member connector 35 with the second sheet 48 facing outward.

  Thereby, the bending sleeve material 46 which has a favorable mechanical strength and can be easily bent can be realized. Therefore, it is possible to withstand the pressure at the time of placing the concrete well, and at the same time, it can be arranged along the contour of the outer skin material holding member coupling body 35. Further, since the flat second sheet 48 is directed outward, the bent sleeve material 46 can be easily peeled off from the inner wall of the opening after the opening is formed.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  Instead of being formed as shown in FIG. 1, the insertion groove 16 can be changed to, for example, an “L” shape (a shape in which the second horizontal groove 19b is omitted) or a fork shape. Further, the shape can be changed to a shape in which “F” is turned upside down, a shape in which “Y” is turned upside down, a shape in which “T” is turned upside down, or the like.

  Instead of forming the vertical grooves 18 in the vertical direction, they can be formed obliquely.

  The direction display unit 23 can be changed to a face of an animal such as a dog or cat, an arrow, or the like, for example, instead of the shape of a human face as shown in FIG. Moreover, it replaces with forming the direction display part 23 with the attachment hole 22, for example, a convex part can be formed in the baseplate 11, and it can also be set as a direction display part by this.

  The washer 33 can be omitted, and the side plates 12 to 15 can be directly tightened with the nut 32.

  The plurality of skin material holding members 10 do not necessarily have to be connected by a rod-like member such as the screw rod 31. For example, when the number of the skin material holding members 10 to be connected is small, such as 2 × 2, the connection body may be configured by winding an adhesive tape around the skin material holding members 10 arranged.

DESCRIPTION OF SYMBOLS 10 Outer material holding member 11 Base plate 12-15 Side plate 16 Insertion groove 18 Vertical groove (central groove)
19a First horizontal groove (first recess, holding recess)
19b Second horizontal groove (second recess, holding recess)
22 Mounting hole 23 Direction indicator 31 Screw rod (bar-shaped member)
35 Skin material holding member assembly 46 Bending sleeve material (skin material)
47 1st sheet 48 2nd sheet

Claims (8)

It is a skin material holding member that can constitute a connected body that can be held in a state where a skin material for forming an opening in a concrete structure is wound around by connecting a plurality of horizontal and vertical and horizontal connections. And
Four side plates,
A rectangular base plate arranged so as to be substantially perpendicular to the side plate;
With
Each of the four side plates is configured to connect at right angles to an adjacent side plate;
Each of the side plates is formed with an insertion groove into which a bar-like member can be inserted, and the outer skin material holding member. The outer skin holding member according to claim 1,
Each said insertion groove has two recessed parts which can hold | maintain the said rod-shaped member,
In the same insertion groove, the two concave portions are arranged with different heights from each other. The outer skin material holding member according to claim 2,
The insertion groove includes a central groove that opens at its upper end, a first recess that branches from the central groove to one side and extends in a horizontal or diagonal direction, and a first groove that extends from the central groove to the other side and extends in a horizontal or diagonal direction. An outer skin material holding member having two recesses. The outer skin material holding member according to any one of claims 1 to 3,
The insertion groove has an asymmetric shape,
The base plate is provided with a direction indicator that indicates the direction of the cover material holding member. The outer skin material holding member according to claim 4,
The skin material holding member, wherein the direction display unit is a face display. The outer skin material holding member according to any one of claims 1 to 5,
A skin material holding member configured to connect a plurality of skin material holding members in a vertical direction. The outer skin holding member according to claim 6,
The insertion groove has a holding recess for holding the rod-shaped member,
When a plurality of skin material holding members are connected in the vertical direction, one skin material holding member is configured to close the open end of the insertion groove in the other skin material holding member and at least not hold the holding recess. An outer skin material holding member characterized by being made. A skin material that is wound around a connection body configured by vertically and horizontally connecting the skin material holding member according to any one of claims 1 to 7,
A first sheet formed into a wave shape;
A flat second sheet bonded only to one surface of the first sheet;
With
An outer skin material wound around the coupling body with the second sheet facing outward.

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