JP4389021B2 - Vertical drain pipe head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a head that is used in connection with the tip of a water collecting pipe for soil improvement generally called a vertical drain pipe, which is used as an embedded state in which the upper end is pushed vertically into the ground from the ground surface and the upper end is opened to the ground. This relates to the member.
[0002]
[Prior art]
This type of vertical drain pipe uses a steel protective pipe and a water jet device on saturated sandy ground, so-called soft ground, which has been determined to have a high possibility of liquefaction by a special or specific soil improvement contractor. Then, for example, 15 m or 20 m is inserted into the ground from the ground surface, one end thereof is projected to the ground and opened, and a cap for preventing mixing of earth and sand is attached to the opening. As this type of vertical drain pipe currently used, it is generally made of synthetic resin. For example, it is made of synthetic resin on the outer periphery of a strength member spirally wound at a predetermined interval of about 100 mm in diameter. An underground drainage pipe for underground burial (for example, Japanese Patent Laid-Open No. Hei. 7-48825) is known.
[0003]
Therefore, in order to insert a pipe having such a water collection structure into the ground as a vertical drain pipe, it is necessary to close the tip opening of the pipe and protect the tip from being damaged. A means to do is necessary. Therefore, in the current conventional product, as shown in FIG. 13, a cylindrical body 40 having a spiral groove 43 on the outer peripheral surface and a bottom 42 at one end is formed, and a bolt insertion hole 41 is formed at the center of the bottom 42. Bolt insertion holes are also formed in the central part of the horizontal plate 46 which is formed and welded and integrated with another steel plate bridged over the anchor member 45 made of iron plate bent into a V shape in side view. When connecting the two members, the bolts 47 are inserted into the bolt insertion holes from the inside of the cylindrical body 40, and are fastened with nuts from below the horizontal plate 46 to connect the two members. .
[0004]
[Problems to be solved by the invention]
However, the head member of the conventional vertical drain pipe having such a structure requires post-processing in which the bolt insertion hole 41 must be formed in the bottom 42 after the cylindrical body 40 is formed. When connecting 45, there was a problem to be solved that a complicated and troublesome work of tightening the nut in the narrow space below the horizontal plate 46 was forced.
[0005]
The present invention focuses on the above-mentioned problems that the conventional vertical drain pipe head member has, and aims to solve these problems without requiring post-processing such as drilling. The present invention is intended to provide a head member of a vertical drain pipe having a structure in which the members can be connected to each other almost easily in an almost one-touch manner.
[0006]
[Means for Solving the Problems]
The configuration of the present invention for achieving the object will be described using the reference numerals used in the embodiments. A tip jig for attaching to the tip of a vertical drain pipe and press-fitting it into the ground in advance. It consists of a cylindrical member 1 that is inserted and connected into the end of the pipe, and an anchor member 2 that is formed in a side surface shape V shape that is connected to the distal end side of the cylindrical member 1, and the cylindrical member 1 moves toward the distal end side. A projecting plate-like or bar-like projecting body 11 is provided, and the anchor member 2 is provided with a plate-like or bar-like projecting body 21 projecting upward from the anchor main body 22, and both the projecting bodies 11, 21 are laterally arranged. In this configuration, any one of a hook-shaped engaging portion 31 having an opening 30 and an engaging hole 32 fitted to the engaging portion 31 is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In implementing the vertical drain pipe head having such a configuration, the cylindrical member 1 is provided with a plate-like protrusion 11 having an engagement hole 32, and the anchor member 2 is hooked. The present invention can be implemented as including a plate-like projecting body 21 in which a shape engaging portion 31 is formed. The tubular member 1 is entirely formed of a synthetic resin material, and the anchor member 2 is formed of an iron-based metal such as a steel material for the sake of strength. preferable.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing a first embodiment of the present invention, in which FIG. 1 is a perspective view of a cylindrical member, FIG. 2 is a front view of the same figure with a part broken away, and FIG. FIG. 4 is a perspective view of the anchor member, and FIGS. 5, 6 and 7 are a plan view, a front view, and a cross-sectional view taken along line AA in FIG. 8 to 10 are a perspective view, a front view, and a partially sectional side view for explaining the connected state.
[0009]
The vertical drain pipe head shown in the embodiment is, for example, a tip jig that is attached to the tip of a vertical drain pipe P having a structure shown in FIG. It is. The jig includes a cylindrical member 1 that is inserted into and connected to the end of the pipe P, and an anchor member 2 that is formed in a side shape V-shape for use by being connected to the distal end side of the cylindrical member 1. Consists of.
[0010]
Thus, the cylindrical member 1 is a single body that is integrally molded with a polypropylene resin that is a non-chlorine resin that hardly deteriorates with time even in the ground and does not cause environmental problems. A cylindrical portion in which a spiral groove 13 is formed on the outer peripheral surface to be fitted with a spiral reinforcing core member (reference symbol a in FIG. 9) protruding from the inner surface of the vertical drain pipe P, and from the bottom 12 to the tip side A hook-like engagement member, which will be described later, is provided with a plate-like protrusion 11 that protrudes downward (downward in FIG. 1), and has the anchor member 2 formed in the intermediate portion in the width direction as seen in FIG. An engagement hole 32 for engaging with the joint portion 31, here, a structure having a long hole that is long in the vertical direction, is used.
[0011]
The anchor member 2 is formed of a steel plate as a whole, and a single steel plate is substantially V-shaped. More specifically, both sides of the anchor member 2 are shown in FIG. In this embodiment, the anchor body 22 is bent upwards by about 60 degrees and is projected upward from the center portion of the flat portion 23 in this embodiment. A structure in which a rectangular plate-like protrusion 21 is protruded by welding, and a hook-like engagement portion 31 having a circular hole formed with the opening 30 facing in the lateral direction is formed near the upper end of the protrusion 21. It is what.
[0012]
In order to fit and connect the two members 1 and 2 having such a structure to each other, for example, the anchor member 2 is arranged so that the opening 30 faces upward, and the plate-like protrusion of the tubular member 1 is inserted into the opening 30. By inserting the body 11 and releasing the anchor member 2 in this state to bring it into a normal posture, the hook-like engaging portion 31 of the anchor member 2 is formed on the protruding body 11 of the tubular member 1 as seen in FIG. The long hole-like engagement hole 32 can be fitted.
[0013]
Next, with respect to the vertical drain pipe P for connecting the head member as described above, the outline structure will be described with reference to FIG. 9. A polyethylene reinforcing core material a having a cross-sectional shape upside down is formed. The groundwater filtration membrane b is spirally wound between the adjacent reinforcing cores a, a and heat-sealed, and the nonwoven fabric c is wound around the outer peripheral surface thereof. The outer peripheral protective band d made of polyethylene is a pipe P that is spirally wound on both side edges of the filtration membrane b and the nonwoven fabric c and heat-sealed on the outer peripheral surface of the reinforcing core material a.
[0014]
The pipe P is appropriately implemented as necessary with respect to its structure, diameter, pitch of the reinforcing core material a, etc., and is not of a fixed shape. The approximate dimensions of each part are as follows for a pipe having an outermost diameter = 100 mm. The minimum diameter formed by the reinforcing core material a = 80 mm, the diameter of the filtration membrane b portion = 95 mm, the helical pitch = 35 mm, the lateral width of the reinforcing core material = 16 mm, and the lateral width of the outer peripheral protective band d = 14 mm.
[0015]
FIGS. 11 and 12 show the second embodiment. In this embodiment, the hook-like engagement portion 31 shown in the first embodiment is formed on the projecting body 11 of the tubular member 1. The engagement hole 32 that fits into the hook-shaped engagement portion 31 is formed in the protruding body 21 of the anchor member 2. About another point, it applies to description of the said 1st Example.
[0016]
Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. For example, the anchor member 2 has a conical shape or a pyramid shape with a constriction. For example, it can be formed of a non-ferrous metal or a synthetic resin material that does not generate harmful substances such as patina, and has the above-described constituent requirements according to the present invention and achieves the object of the present invention, The present invention can be implemented with appropriate modifications within the range having the effect.
[0017]
【The invention's effect】
As is clear from the above description, the vertical drain pipe head according to the present invention has protrusions formed on the cylindrical member and the anchor member, respectively, and both of these protrusions have an opening in the lateral direction. Forming the hook-shaped engaging portion provided on the other side and forming an engaging hole to be engaged with the engaging portion on the other side, thereby inserting the other protruding body into the lateral opening formed on one side, Since the fitting connection of both members can be completed by a very simple means of changing the relative angle of the projecting body, the two members can be connected very quickly and easily in a one-touch manner. It has the remarkable effect of being able to.
[0018]
In addition, forming the projecting body on the tubular member and forming the hook-shaped engaging portion or the engagement hole on the projecting body can be performed simultaneously with the molding of the tubular member. There is also a manufacturing advantage in that no post-processing is required after forming the shaped member.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a cylindrical member of a first embodiment.
FIG. 2 is a front view of the member.
FIG. 3 is a side view of the member.
FIG. 4 is a perspective view of the anchor member.
FIG. 5 is a plan view of the member.
FIG. 6 is a front view of the member.
7 is a cross-sectional view taken along line AA in FIG.
FIG. 8 is a perspective view showing a connected state of both members.
FIG. 9 is a front view of the same.
FIG. 10 is a side view with the same part cut away.
FIG. 11 is a partial sectional view of an essential part showing a second embodiment.
FIG. 12 is a side view of a portion corresponding to FIG. 10 of the same embodiment.
FIG. 13 is a partially cutaway front view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical member 11 Protruding body 2 Anchor member 21 Protruding body 22 Anchor main body 30 Opening 31 Hook-like engaging part 32 Engaging hole P Vertical drain pipe

Claims (3)

A tip jig that is attached to the tip of the vertical drain pipe and press-fitted into the ground first, and is inserted into and connected to the end of the vertical drain pipe (1), and the tip of the cylindrical member (1) An anchor member (2) formed in a side shape V-shaped connected to the side, and the cylindrical member (1) includes a plate-like or rod-like protrusion (11) protruding toward the tip side, and the anchor The member (2) includes a plate-like or rod-like projection (21) projecting upward from the anchor body (22), and both the projections (11), (21) are laterally open (30) A vertical drain pipe head provided with either a hook-like engagement portion (31) provided with an engagement hole (32) fitted to the engagement portion (31). The cylindrical member (1) is provided with a plate-like protrusion (11) in which an engagement hole (32) is formed, and the anchor member (2) is a plate-like protrusion in which a hook-like engagement portion (31) is formed ( 21. The vertical drain pipe head according to claim 1, wherein the vertical drain pipe has a structure comprising 21). The vertical drain pipe head according to claim 1 or 2, wherein the entire tubular member (1) is formed of a synthetic resin material, and the entire anchor member (2) is formed of a ferrous metal.

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