JP2008031647A - Barricade stand - Google Patents

Abstract

To securely and properly fix a clamp and a pipe.
A plastic stand body 1 and a metal nut member 2 for fixing a clamp C for holding and fixing a pipe P in cooperation with a bolt B are provided. The nut member 2 is provided with a female screw portion 6 screwed into the bolt B and a fixing portion 8 where the plastic of the stand body 1 is entangled during molding. The fixing portion 8 has a protrusion 10 formed by bending outwardly a dividing wall 13 divided by a plurality of cracks 12 at the lower end of the nut member 2, and is provided on the other side of the female screw portion 6 of the nut member 2. . With the fixing portion 8 facing the inside of the stand main body 1 and the female screw portion 6 exposed on the outer surface of the stand main body 1, it is inserted and fixed at the same time as the stand main body 1 is blow-molded.
[Selection] Figure 2

Description

  The present invention relates to a barricade stand of a type that supports and fixes a horizontal pipe through a clamp.

  In order to fix the clamp C, a stand that is embedded and fixed in a state where a tip of a bolt protrudes from the top of the stand is known (Patent Document 1). The stand there is a hollow plastic product by blow molding, and the bolt and the plastic stand body are integrally formed by inserting a bolt at the time of blow molding. One nut is screwed into the bolt to be embedded, and the end surface of the nut is embedded in the upper surface of the stand body so as to be flush with the surface. The bolt head and nut can prevent the bolt from spinning around and coming off.

Japanese Patent No. 3267585

  However, in this type of stand, there is a problem that a defective product is generated due to variations that occur at the time of molding. That is, during insert molding, the projecting dimension of the bolt projecting from the upper portion of the stand body is defined by the screwing amount of the nut to be screwed. Since the adjustment of the screw amount of the nut is usually performed manually, it is difficult to manage the nut with high accuracy. As a result, the projecting dimension of the bolt is not stable and variation occurs. Therefore, when the bolt protrudes greatly, when the clamp is attached to the pipe and the pipe is fixed, the tip of the bolt hits the pipe and the pipe may not be properly held and fixed by the clamp. Although measures can be taken by inserting a washer or the like between the stand main body and the clamp and adjusting the dimensions, such a wasteful member and effort are required, which is inefficient.

  Furthermore, when attaching the clamp, if the nut is excessively screwed into the bolt, the bolt may run idle and be damaged. The bolt and the stand body are integrated by inserting the bolt at the time of blow molding of the stand body, but the resistance due to the hexagonal shape of the bolt head and nut is not enough to withstand, and the plastic wall that is fixed Combined with the thin thickness due to uneven thickness and elastic deformability, there was a risk that the bolts could be idled together with the nuts by spreading the plastic wall.

  The present invention is mainly intended to solve such a problem, and an object of the present invention is to provide a barricade stand that can securely and properly fix a clamp and can securely and appropriately hold and fix a pipe to the clamp. To do.

  The present invention is a barricade stand for supporting and fixing a pipe P to be passed. A stand main body 1 made of a plastic blow molded product and a metal nut member 2 for fixing a clamp C for holding and fixing the pipe P in cooperation with the bolt B are provided. The nut member 2 is inserted and fixed at the same time as the blow molding of the stand main body 1, and the fixing portion 8 where the plastic of the stand main body 1 is entangled with the female screw portion 6 screwed into the bolt B is provided. It is characterized by.

  More specifically, the female screw portion 6 is provided on one side of the vertically long nut member 2. The fixing portion 8 is provided on the other side of the female screw portion 6 and has a protrusion 10 that protrudes outward from the side wall 9 of the nut member 2. The nut member 2 is embedded and fixed with the fixing portion 8 facing the inside of the stand main body 1 and the female screw portion 6 exposed on the outer surface of the stand main body 1.

  Specifically, a plurality of cracks 12 are formed in the lower end portion of the side wall 9 of the nut member 2 along the screw axis direction, and the projections 10 are formed by bending the dividing walls 13 divided by these cracks 12 outward. Can be formed. The degree of bending is not particularly limited, and may be an acute angle of about 30 degrees or a right angle of 90 degrees. Or you may bend | fold 90 degree | times or more until it becomes upward.

  For example, the cracks 12 are formed at four locations that divide the nut radial section of the nut member 2 into approximately four equal parts, and the projections 10 are formed by bending the pair of dividing walls 13 and 13 that are separated by the crack 12 and face outward. -10 may be formed.

  When the pipe P is held and fixed to the clamp C fixed to the stand main body 1 by embedding and fixing the nut member 2 for fixing the clamp C in cooperation with the bolt B to the stand main body 1, the pipe P is securely attached. Can be held and fixed. That is, in such a configuration, the head 23 of the bolt B and the washer 22 inserted therebetween are positioned on the pipe P side of the clamp C fixed to the stand body 1 as shown in FIGS. However, since the dimensions of the head 23 and the washer 22 of the bolt B are defined with high accuracy, the head 23 of the bolt B hits the pipe P even if the embedment amount of the nut member 2 varies somewhat. There is nothing to do.

  When the fixing part 8 where the plastic of the stand body 1 is entangled is provided on the metal nut member 2 that is insert-molded simultaneously with the blow molding of the stand body 1, the plastic stand body 1 is entangled with the metal nut member 2. Therefore, both can be firmly integrated, and the nut member 2 can be reliably prevented from coming out of the stand main body 1 and the nut member 2 can be prevented from idling by strongly screwing the bolt B.

  A female screw portion 6 is provided on one side, and the vertically long nut member 2 provided with a fixing portion 8 having a protrusion 10 protruding outward from the side wall 9 on the other side is used, and the fixing portion 8 is used as the stand body 1. If the internal thread portion 6 is embedded and fixed in an exposed state on the outer surface of the stand main body 1, the plastic can be stably entangled in the fixing portion 8 during molding. In blow molding, as shown in FIG. 4, compressed air is fed into a melt-softened sheet-like plastic (parison) 20 and the plastic is brought into close contact with the mold 17. However, the inner side tends to swell due to space, and the plastic 20 tends to be stably molded. Therefore, the nut member 2 and the stand body 1 can be stably and reliably integrated by disposing the fixing portion 8 that can pinch the plastic 20 inside the stand body 1.

  If a plurality of cracks 12 are formed in the lower end portion of the side wall 9 of the nut member 2 along the screw axis direction, and the projections 10 are formed by bending the dividing wall 13 divided by the cracks 12 outward, the length is simply long. No additional assembly or special processing is required, and it can be easily replaced with the current product, providing excellent practicality and productivity. Since the plastic 20 enters from the crack 12 into the nut member 2 and the plastic 20 is entangled with the dividing wall 13, the nut member 2 and the stand main body 1 can be integrated extremely firmly.

  When the projections 10 and 10 are formed by dividing the cross section of the nut member 2 in the radial direction of the screw into approximately four equal parts in a cross shape and bending the pair of opposed divided dividing walls 13 and 13 outward, If the cutting process for cutting the two opposing portions of the member 2 is performed by crossing twice, the necessary cracks 12 can be easily formed. After that, it is only necessary to bend the pair of facing dividing walls 13 and 13 outward, and it can be easily processed in a short time. Since the rotation radii of the two pairs of dividing walls 13 in the screw radial direction are different from each other, a sufficient load can be given to the rotation, and the idling of the nut member 2 can be effectively prevented.

  1 to 7 show an embodiment of a barricade stand according to the present invention. As shown in FIG. 1, at least two barricade stands of the present invention are used as a set, and are arranged to face each other to support and fix a pipe P to be passed. The stand includes a stand main body 1 and a nut member 2 embedded and fixed in the stand main body 1. A bolt C is screwed into the nut member 2 and a clamp C for holding and fixing the pipe P is fastened and fixed. Yes. In the present embodiment, a stand of a type that supports and fixes the two pipes P that are passed in a substantially parallel manner is shown, but the number of pipes P to be supported is not limited.

  The stand body 1 is a hollow integrated molded product made of plastic such as polyethylene or polypropylene manufactured by blow molding. As shown in FIG. 2, the stand body 1 has an A-shape when viewed from the side, and is substantially between the leg portions 3 and 3 having inverted V-shapes divided into two forks from the upper end. It is provided with a beam portion 5 that extends horizontally. A nut member 2 is embedded and fixed on each upper surface of the upper end of the stand body 1 and the central portion of the beam portion 5.

  As shown in FIG. 3, the nut member 2 is a metal product having a vertically long cylindrical shape, and a female screw portion 6 in which a spiral female screw ridge that is screwed into a bolt B is formed on the inner peripheral surface of the nut member 2. A fixing portion 8 for holding the plastic 20 of the stand body 1 at the time of insert molding is provided below. The fixing unit 8 has protrusions 10 that protrude outwardly from the side wall 9 of the nut member 2. These protrusions 10 have a screw radial direction cross section of about 4 at the lower end of the side wall 9 of the nut member 2. In four equally divided places, the splits 12 are formed along the screw axis direction, and the pair of split walls 13 and 13 that are split by the split 12 and face each other are bent outward. Specifically, for example, if a cut is made in a cross shape along the screw axis direction at one end of the long nut and then the wedges are driven to widen the opposing dividing walls 13 and 13, the man-hour can be easily reduced. The nut member 2 can be processed.

  The nut member 2 is inserted into the stand main body 1 simultaneously with the blow molding of the stand main body 1 with the fixing portion 8 facing the inside of the stand main body 1 and the female screw portion 6 exposed on the outer surface of the stand main body 1. Has been fixed buried.

  Specifically, as shown in FIG. 4A, first, the female screw portion 6 of the nut member 2 is screwed into the jig 14 to which the bolt B that is screwed into the female screw portion 6 of the nut member 2 is fixed. Set in a predetermined position of the mold 17. The mold 17 includes a pair of mold frames 17a and 17a, and is formed by joining both mold frames 17a. At this time, the fixing portion 8 of the nut member 2 is set so as to be positioned near the center of the molding hole 18 of the die 17 joined.

  Subsequently, as shown in FIG. 4 (b), the heated and melted plastic (parison) 20 is extruded into a cylindrical shape between the opposing surfaces of both mold frames 17a, and then sandwiched between both mold frames 17a. By blowing air and inflating the plastic 20, the plastic 20 is adhered and solidified to the inner surface of the molding hole 18 of the mold 17, thereby forming the hollow stand body 1 in which the nut member 2 and the plastic 20 are integrated. it can.

  At this time, as shown in FIGS. 5 and 6, the plastic 20 is firmly entangled with the fixing portion 8 of the nut member 2, and the stand main body 1 and the nut member 2 are molded firmly. That is, since the fixing portion 8 of the nut member 2 protrudes in the vicinity of the center of the molding hole 18 of the mold 17, the sheet-like plastic 20 that has been blown with air is separated from each dividing wall 13 of the fixing portion 8 of the nut member 2. Needless to say, it enters from the crack 12 to the inside of the nut member 2 and is solidified. Even if the thickness is reduced due to uneven thickness, there is no possibility of causing idling as in the conventional product for fixing the bolt B. The molded product cooled and solidified is taken out from the mold 17 together with the jig 14, and then the jig 14 is removed to remove unnecessary burrs and the molding is completed. In addition, since the female screw portion 6 of the nut member 2 is molded with the bolt B of the jig 14 screwed in, the plastic 20 may enter the inside of the nut member 2 and cause trouble in the female screw portion 6. There is no.

  As shown in FIGS. 2 and 5, the stand is used by fixing a clamp C for holding and fixing the pipe P. The clamp C is a known clamp C for fixing the pipe P. A predetermined bolt B is inserted into a bolt hole formed in the lower wall 21 of the clamp C via a washer 22, and is screwed into the female screw portion 6 of the nut member 2 embedded and fixed in the stand main body 1. At this time, only the head portion 23 and the washer 22 of the bolt B protrude above the lower wall 21 of the clamp C, as shown in FIG. Therefore, the projection dimension is constant without being affected by variations during molding, so that the bolt B does not hit the pipe P, and the pipe P can be securely held and fixed. In addition, even if the bolt B is firmly screwed in, the nut member 2 and the stand main body 1 are firmly integrated with each other, so that there is no possibility of idling (see FIG. 6). There is no possibility that the nut member 2 will come off even if it is handled roughly, such as by dragging only the pipe P.

  The protrusion 10 of the fixing unit 8 may be formed by welding a plurality of metal pieces on the outer surface of the nut member 2, or two through holes that face the outer surface are formed, and one protrusion is formed in each of the through holes. A metal bar may be inserted so that both ends of the metal bar protrude from the side wall of the nut member 2 in an opposing manner.

Conceptual diagram showing how the stand is used Side view of stand A perspective view showing a nut member Illustration of the stand molding method Cross section of the main part of the stand as seen from the side Sectional view seen from the AA line in FIG. Cross section of the main part of the stand as seen from the front

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stand main body 2 Nut member 6 Female thread part 8 Fixing part 10 Protrusion 12 Crack 13 Split wall P Pipe C Clamp B Bolt

Claims (4)

A barricade stand for supporting and fixing the pipe (P) to be passed,
A stand body (1) made of a plastic blow molded product;
A clamp (C) for holding and fixing the pipe (P), and a metal nut member (2) for fixing the clamp (C) in cooperation with the bolt (B);
The nut member (2) is inserted and fixed at the same time as the blow molding of the stand body (1),
A barricade stand characterized in that the nut member (2) is provided with a female thread portion (6) screwed into the bolt (B) and a fixing portion (8) where the plastic of the stand body (1) is entangled during molding. . The barricade stand according to claim 1,
The female thread portion (6) is provided on one of the vertically long nut members (2),
The fixing portion (8) is provided on the other side of the female screw portion (6) and has a protrusion (10) protruding outward from the side wall (9) of the nut member (2).
A barricade stand in which the nut member (2) is embedded and fixed with the fixing portion (8) facing the inside of the stand body (1) and the female screw portion (6) exposed on the outer surface of the stand body (1). . A barricade stand according to claim 2,
A plurality of cracks (12) are formed in the lower end portion of the side wall (9) of the nut member (2) along the screw shaft direction.
A barricade stand in which protrusions (10) are formed by bending the dividing wall (13) divided by the cracks (12) outward. A barricade stand according to claim 3,
The cracks (12) are formed at four locations that divide the nut radial section of the nut member (2) into approximately four equal parts,
A barricade stand in which protrusions (10) are formed by bending outwardly a pair of dividing walls (13) separated by a split (12) and facing each other.

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