JP2012031676A - Barricade - Google Patents

Abstract

An object of the present invention is to provide a barricade capable of firmly fixing a screw part to a stand by firmly inserting the screw part into the stand and securely preventing the screw part from being rotated or detached from the stand in the process of assembling or disassembling the barricade. I will provide a.
A fastener 25 is inserted when the stand 1 is molded. The fastening bracket 25 is composed of a hexagonal cylindrical female screw body 27 having a vertically penetrating screw hole 26 and a retaining body 28 screwed into the lower portion of the screw hole 26. Six rotation stoppers 29 are provided on the peripheral surface of the female screw body 27. The retaining member 28 includes a screw shaft 31 and a flange portion 32 continuous with the lower portion of the screw shaft 31. The fastening bracket 25 is inserted in a state where the lower portion of the screw shaft 31 and the flange portion 32 are exposed to the outside of the lower end of the female screw body 27, and the fastening bracket 25 is fixed to the stand 1 so that it cannot rotate and cannot be detached. To do.
[Selection] Figure 1

Description

  The present invention relates to a barricade constituted by a pair of left and right stands made of a plastic molded product and a metal pipe fixed to both stands.

  In this type of barricade, a screw component for fastening the clamp fitting is insert-fixed to the stand, and the pipe is held and fixed by the clamp fitting fastened to the screw component. In this type of screw component, in Patent Document 1, a nut member is insert-fixed in the process of blow molding a stand. The nut member is formed from a metal tube material, and an internal thread is formed on the upper inner surface, and a detent structure is formed on the lower peripheral surface. The detent structure is composed of a pair of left and right projections that project outward and a pair of front and rear dividing walls, and each of the projection and the dividing wall that projects from the metal tube is entangled with the softened plastic material. Thus, the nut member can be prevented from rotating. The clamp fitting is fixed to the stand by screwing a bolt inserted through the bottom wall into the nut member.

  A similar screw part is also disclosed in the stand of Patent Document 2. There, a screw component is constituted by a bolt and a nut screwed into the bolt. In the process of forming the stand, the screw shaft of the bolt is protruded from the nut, and the bolt and the nut are insert-fixed to the stand with the end face of the nut exposed to the fastening surface of the clamp fitting. The clamp fitting is fixed by screwing a nut into the screw shaft from the inner surface side of the fitting through the mounting hole in the bottom wall of the clamp fitting. In the screw component in this case, the operation head of the inserted bolt exhibits a detent function.

Japanese Patent Laying-Open No. 2008-31647 (paragraph number 0018, FIG. 3) Japanese Patent No. 3267585 (paragraph number 0010, FIG. 3)

  According to the stand of Patent Document 1, since the nut member is embedded in the fastening surface of the stand, even if there is some variation in the embedded depth, the nut member does not interfere with the pipe fixed to the clamp fitting. Absent. However, there is a problem in that the embedded nut member cannot be firmly fixed to the stand. For example, in the situation where only one side of the pipe is fixed to the clamp fitting, if a lateral external force acts on the end of the pipe that is not fixed to the clamp fitting, the clamp fitting and screw part on the side holding the pipe On the other hand, an excessive moment proportional to the length of the pipe acts. In such a case, the nut member rotates with the clamp fitting while deforming the surrounding wall, or the surrounding wall of the nut member breaks and the stand becomes unusable. In the worst case, the embedded nut member may come off the stand.

  Moreover, in the stand of patent document 2, since the operation head of a volt | bolt only exhibits a non-rotating function, in the situation where an excessive moment acts, like the above-mentioned nut member, along with the above-mentioned nut member, the fracture of the surrounding wall It is easy to produce.

The purpose of the present invention is to make the stand more rigid by firmly fixing the screw part to the stand, and to ensure that the screw part is rotated or removed from the stand in the process of assembling and disassembling the barricade. It is to provide a barricade that can be prevented.
An object of the present invention is to provide a barricade that can exhibit a stronger anti-rotation function and an anti-disengagement function while simplifying the structure of a screw part, and thus can reduce the overall cost.

  The barricade according to the present invention includes at least two stands 1, pipes 2 spanning the stands 1, and clamp fittings 3 that are attached to the stands 1 and fix and support the pipes 2. The stand 1 is made of a plastic molded product, and a fastening fitting 25 is inserted into the fastening surface 7 for the clamp fitting 3. The fastening bracket 25 is composed of a cylindrical female screw body 27 provided with a screw hole 26 penetrating vertically and a retaining body 28 screwed into the lower portion of the screw hole 26 (see FIG. 4). An anti-rotation portion 29 is provided on the peripheral surface of the female screw body 27. The retaining member 28 includes a screw shaft 31 and a flange portion 32 continuous with the lower portion of the screw shaft 31. The fastening bracket 25 is inserted in a state where the lower portion of the screw shaft 31 and the flange portion 32 are exposed to the outside of the lower end of the female screw body 27, and the fastening bracket 25 is fixed to the stand 1 so that it cannot rotate and cannot be detached. To do.

  A cross-section of the peripheral surface of the female screw body 27 is formed in a non-circular shape, and a detent portion 29 made of a flat surface is formed at least at one location on the peripheral surface of the female screw body 27.

  The retaining member 28 is composed of a hexagonal bolt provided integrally with a screw shaft 31 and a hexagonal flange portion 32.

  The female screw body 27 is formed in a hexagonal cross section, and six rotation stoppers 29 are formed from the upper end to the lower end of the peripheral surface.

  In the present invention, the fastening bracket 25 inserted into the stand 1 is composed of a cylindrical female screw body 27 provided with a vertically penetrating screw hole 26 and a retaining body 28 screwed into the lower portion of the screw hole 26. Further, the rotation preventing portion 29 is provided on the peripheral surface of the female screw body 27. Thereby, the rotation prevention part 29 was received by the surrounding wall 35 which covers the surrounding surface of the internal thread body 27, and the internal thread body 27 was prevented from rotating around the center of a screw shaft. Further, the flange portion 32 of the retaining body 28 is received by a retaining wall 36 formed between the lower end of the female screw body 27 and the flange portion 32, and the inserted fastening fitting 25 is prevented from being detached from the stand 1. I stopped it. Therefore, according to the barricade of the present invention, the fastening bracket 25 can be more firmly fixed to the stand 1 and the stand 1 can be hardened, and the fastening bracket 25 is rotated in the process of assembling and disassembling the barricade, or It can be reliably prevented from coming off the stand 1.

  In the case where the female screw body 27 is formed in a non-circular cross section and the anti-rotation portion 29 made of a flat surface is formed at least at one place on the peripheral surface, the anti-rotation portion 29 extends from the upper end to the lower end of the cylindrical female screw body 27. Can be formed large. Therefore, the external force acting on the female screw body 27 is dispersed and a load is applied to a part of the surrounding wall 35 as compared with the conventional screw parts in which the protrusion and the dividing wall and the peripheral surface of the bolt operating head are non-rotating portions. Can be eliminated, and accompanying rotation of the female screw body 27 can be prevented more reliably.

  If the retaining body 28 is configured with a hexagon bolt that integrally includes the screw shaft 31 and the hexagonal flange portion 32, the cost can be reduced by configuring the fastening bracket 25 using a commercially available hexagon bolt, Barricade manufacturing costs can be reduced.

  When the female screw body 27 is formed in a hexagonal cross section and six anti-rotation portions 29 are formed from the upper end to the lower end of the peripheral surface thereof, the total area of the anti-rotation portions 29 is significantly larger than that of conventional screw parts. In addition, the rotation preventing portion 29 can be supported by the entire surrounding wall 35 in a non-rotatable manner. Therefore, it can prevent more reliably that the internal thread body 27 rotates around the center of a screw shaft.

It is a vertical side view which shows the fastening structure of the clamp metal fitting which concerns on this invention. It is a perspective view of a barricade. It is a side view of a barricade. It is a disassembled perspective view of a fastening metal fitting. It is the sectional view on the AA line in FIG. FIGS. 6A to 6C are cross-sectional plan views each showing another embodiment of the female screw body. FIG. 7A is a cross-sectional plan view corresponding to FIG. 5, and FIG. 7B is a cross-sectional view taken along line BB in FIG. 7A.

(Example) FIG. 1 thru | or FIG. 5 shows the Example of the barricade based on this invention. In the present invention, “front / rear”, “left / right”, and “upper / lower” refer to the crossing arrows shown in FIG. In FIG. 2, the barricade is composed of a pair of left and right stands 1, pipes (steel pipes) 2 spanning both the stands 1, clamp fittings 3 that are attached to the respective stands 1 and fix both ends of the pipes 2, and the like. The stand 1 is formed in an A shape by integrally forming a pair of front and rear leg frames 4 and a beam portion 5 that bridges the lower portions of both leg frames 4, and blow molding a parison formed of polyethylene or polypropylene. The whole consists of a hollow plastic molded product. A horizontal grounding surface 6 is provided at the lower end of each leg frame 4, and a fastening surface 7 for fastening the clamp fitting 3 is provided horizontally on each of the upper end surface of both leg frames 4 and the upper surface of the beam portion 5. It is.

  As shown in FIG. 1, the clamp fitting 3 includes a square base frame 10, a holding frame 12 connected to one end of the base frame 10 by a pin 11, and a pin 13 to the other end of the base frame 10. It consists of a fastening bolt 14 and a nut 15 that are freely connected. On the opposing surfaces of the base frame 10 and the holding frame 12, a partial arc-shaped holding surface 16 that holds the peripheral surface of the pipe 2 is provided. The bottom surface of the base frame 10 is a horizontal fastening seat 17, and an insertion hole 18 for a bolt 22 described later is formed in the center thereof. When the nut 15 is loosened and the fastening bolt 14 is laid sideways along the bolt groove 19, the pipe 2 can be attached and detached by swinging the holding frame 12 around the pin 11.

  In order to fasten and fix the clamp fitting 3 to the fastening surface 7 of the stand 1, a fastening fitting (screw part) 25 is inserted into each fastening surface 7. As shown in FIG. 3, the fastening bracket 25 is composed of a commercially available hexagonal cylindrical female screw body 27 having a vertically extending screw hole 26 and a retaining member 28 screwed into the lower portion of the screw hole 26. . Flat anti-rotation surfaces (anti-rotation portions) 29 are formed from the upper end to the lower end at six locations on the peripheral surface of the hexagonal cylindrical female screw body 27. In order to sufficiently secure the entire area of the anti-rotation surface 29 in the female screw body 27, when the nominal diameter of the screw hole 26 is 10 mm, the vertical dimension of the female screw body 27 is 30 mm.

  The retaining member 28 includes a screw shaft 31 and a hexagonal flange portion 32 continuous to the lower portion of the screw shaft 31. In this embodiment, a commercially available hexagon bolt is used as the retaining member 28, and the hexagonal operation head also serves as the flange portion 32. As shown in FIG. 1, the retaining body 28 is screwed into the female screw body 27 in a state where the lower portion of the screw shaft 31 and the flange portion 32 are exposed to the outside of the lower end of the female screw body 27. In order to make the constant, a part of the screw thread is crushed to form the stopper 33 (see FIG. 4). Thus, by providing the stopper 33 and defining the screwing limit of the retaining member 28, the vertical gap E between the lower end surface of the female screw member 27 and the upper surface of the flange portion 32 can be made constant at all times.

  The entire fastening bracket 25 is embedded in the fastening surface 7 and is embedded in a state where only the upper end surface of the female screw body 27 is exposed to the fastening surface 7. For this purpose, a jig is screwed into the upper part of the screw hole 26 of the female screw body 27, and the jig and the fastening bracket 25 are loaded into a molding die, whereby the fastening bracket 25 is properly positioned in the molding space. Can be loaded. In the process of molding the stand 1, pressurized air is blown into the softened parison to inflate it, and its peripheral wall is brought into close contact with the molding surface that is recessed in the mold.

  At this time, as shown in FIG. 1, a part of the bulging wall is in close contact with the peripheral surfaces of the female screw body 27 and the retaining member 28 to form an surrounding wall 35 that surrounds the peripheral surface of the fastener 25. The ring-shaped retaining wall 36 is formed by entering the upper and lower gap E described above. The surrounding wall 35 is continuous with the left and right side walls of the stand 1 via an inner wall 37 continuous with the outer surface thereof, and a vertically long recess 38 is formed by the surrounding wall 35 and the inner wall 37 (see FIG. 5). After the molding is completed, the stand 1 is released from the mold together with the jig, and then the jig is removed from the female screw body 27 so that the upper end surface of the female screw body 27 is exposed to the fastening surface 7.

  According to the fastening bracket 25 embedded in the stand 1 as described above, the six anti-rotation surfaces 29 provided around the female screw body 27 are inserted by the surrounding wall 35 and the inner wall 37 in cooperation. It is possible to reliably prevent the female screw body 27 from rotating about the vertical axis with respect to the stand. Further, by receiving the flange portion 32 of the retaining body 28 with the retaining wall 36, it is possible to reliably prevent the inserted fastening fitting 25 from being detached from the stand 1.

  When assembling the barricade, the fastening seat 17 of the clamp fitting 3 is placed on the fastening surface 7 of each stand 1, and the bolt 22 inserted through the washer 23 and the insertion hole 18 is screwed into the screw hole 26 of the female screw body 27. The clamp metal fitting 3 is fixed. Next, the pipe 2 is temporarily placed on the clamp fitting 3 provided on each fastening surface 7 with the pair of stands 1 lying on its side. At this time, the holding frame 12 is opened in advance, and the pipe 2 is placed on the holding surface 16 of the base frame 10 in the opened state. Further, the holding frame 12 is tilted to the holding posture, the fastening bolt 14 is inserted into the bolt groove 19, and the nut 15 is tightened in this state to temporarily fix the pipe 16. In this state, since the left and right stands 1 are connected via the pipe 2, the standing posture can be self-held by raising the whole. After adjusting the positions of the clamp fitting 3 and the pipe 2, the nut 15 is tightened to the end to complete the assembly.

  According to the barricade configured as described above, when only one side of the pipe 2 is fixed to the clamp fitting 3, even if a lateral external force acts on the end of the pipe that is not fixed, the pipe 2 The fastening bracket 25 on the fixed side can be prevented from rotating with the pipe 2 via the clamp fitting 3. This is because six anti-rotation surfaces 29 are provided on the entire peripheral surface of the hexagonal cylindrical female screw body 27 to increase the total area of the anti-rotation surfaces 29, and these anti-rotation surfaces 29 are received by the surrounding wall 35. This is because the internal thread body 27 can be prevented from rotating around the vertical axis. Further, since the flange portion 32 of the retaining member 28 is received by the ring-shaped retaining wall 36, it is possible to reliably prevent the inserted fastening fitting 25 from being detached from the stand 1. Furthermore, by using the commercially available product as the internal thread body 27 and further using the commercially available hexagon bolt as the retaining body 28, the fastening bracket 25 can be configured at a lower cost. The overall cost of the barricade can be reduced in spite of being able to demonstrate the retaining function.

  FIGS. 6A to 6C show other embodiments of the female screw body 27, respectively. In FIG. 6 (a), the female screw body 27 is formed of a cylindrical body having a square section with a vertically extending screw hole 26, and four anti-rotation surfaces (non-rotation portions) 29 are formed on the peripheral surface thereof. I made it. The other parts are the same as the stand 1 described in the previous embodiment, and therefore the same members are denoted by the same reference numerals and description thereof is omitted. The same applies to the embodiments described below.

  In FIG. 6 (b), the female screw body 27 is formed of a cylindrical body having a D-shaped cross section provided with a screw hole 26 penetrating vertically, and three anti-rotation surfaces (non-rotation portions) 29 are formed on the peripheral surface thereof. I tried to do it.

  In FIG. 6C, the female screw body 27 is formed of a round cylindrical body having a threaded hole 26 that penetrates vertically, and the pin 41 is driven into the female screw body 27 in a state perpendicular to the central axis of the female screw body 27 to prevent rotation. Part 29 was formed. The length of the pin 41 is set to be larger than the diameter dimension of the female screw body 27, and the pin end portion (projection) that protrudes from the peripheral surface of the female screw body 27 constitutes the rotation preventing portion 29.

  FIG. 7 shows another embodiment of the stand 1. In this case, the surrounding wall 35 can be reinforced with a gate-shaped reinforcing frame 44. The reinforcing frame 44 is bent into a gate shape with a pair of left and right leg pieces 45 inserted into the recess 38 and a seat wall 46 that connects the upper ends of both leg pieces 45. The center of the seat wall 46 is external to the female screw body 27. The connecting hole 47 to be fitted is opened. The upper surface of the seat wall 46 is flush with the fastening surface 7 together with the upper end surface of the female screw body 27. The front and rear edges of the leg piece 45 mounted in the recess 38 are received by the inner wall 37, and prevent the female screw body 27 from being rotated in cooperation with the surrounding wall 35 that receives the rotation preventing surface 29. Further, by setting the opposing width of the leg pieces 45 in the free state to be smaller than the left and right widths of the surrounding wall 35, the surrounding wall 35 that has received an external force is restricted from elastically deforming into an outward bulge shape, 35 is reinforced.

  In the above embodiment, the barricade is configured using the pair of left and right stands 1 as legs, but the barricade can be configured using three or more stands 1 as legs. The stand 1 can be formed by a molding method other than blow molding, if necessary, and can be formed by, for example, an injection molding method.

  In the above embodiment, the stopper 33 is provided on a part of the screw shaft 31 so as to define the screwing limit of the retaining member 28, but this is not necessary. For example, the screwing limit of the screw shaft 31 can be made constant by forming the screw hole 26 and the screw shaft 31 of the female screw body 27 with screws having different screw standards. For example, the screwing limit of the screw shaft 31 can be made constant by forming the screw hole 26 with a metric screw and forming the screw shaft 31 with an inch screw.

DESCRIPTION OF SYMBOLS 1 Stand 2 Pipe 3 Clamp metal fitting 7 Fastening surface 25 Fastening metal fitting 26 Screw hole 27 Female screw body 28 Retaining body 29 Anti-rotation surface 35 Surrounding wall 36 Retaining wall

Claims (4)

At least two stands (1), pipes (2) spanned over the respective stands (1), and clamp fittings (3) attached to the stands (1) and fixedly supporting the pipes (2). A barricade
The stand (1) is made of a plastic molded product, and the fastening bracket (25) is inserted into the fastening surface (7) for the clamp fitting (3).
The fastening bracket (25) is composed of a cylindrical female screw body (27) having a screw hole (26) penetrating vertically and a retaining body (28) screwed into the lower portion of the screw hole (26). Yes,
An anti-rotation portion (29) is provided on the peripheral surface of the female screw body (27),
The retaining body (28) includes a screw shaft (31) and a flange portion (32) continuous to the lower portion of the screw shaft (31).
The fastening bracket (25) is inserted with the lower portion of the screw shaft (31) and the flange portion (32) exposed to the outside of the lower end of the female screw body (27), and the fastening bracket (25) is attached to the stand (1). The barricade is fixed so that it cannot rotate and cannot be removed.   The cross section of the peripheral surface of the female screw body (27) is formed in a non-circular shape, and a rotation stopper (29) made of a flat surface is formed in at least one location of the peripheral surface of the female screw body (27). The barricade described.   The barricade according to claim 1 or 2, wherein the retaining member (28) comprises a hexagonal bolt integrally provided with a screw shaft (31) and a hexagonal flange portion (32).   The barricade according to claim 2 or 3, wherein the female screw body (27) is formed in a hexagonal cross section, and six detents (29) are formed from the upper end to the lower end of the peripheral surface.

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