JPH0452259Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an expansion joint for a parapet of a road bridge, etc., which can cope with temperature changes and has guaranteed strength.

(Prior Art) Road bridges and the like are provided with so-called handrails as protective fences in order to prevent vehicles from deviating from the road surface. Since the caps and horizontal bars that make up the balustrade are long, they expand and contract with changes in temperature. Therefore, the balustrade must have a structure that can accommodate expansion and contraction due to temperature changes. FIG. 8 shows a conventional expansion joint for a balustrade. A capstone b is fixed laterally to a support post a erected on the side of a road bridge or the like.
This cap b is divided in the middle, and an appropriate gap c is provided between one cap b ₁ and the other cap b ₂ .
Both Kasagi b ₁ and b ₂ are connected by joint pipe d,
It is designed to accommodate expansion and contraction due to temperature changes. Further, a horizontal bar (not shown) provided below the cap board b has a similar configuration.

(Problem that the invention aims to solve) However, since the balustrade with this structure only has joint pipes inserted as joints in both the Kasagi, if an external force such as a car on the Kasagi is applied, the joints will be damaged. There was a problem that the railings easily came off and did not fulfill their function and strength as balustrades.

(Means for Solving the Problems) The expansion joint of the balustrade of the present invention consists of a fixed balustrade and a movable balustrade, and these two balustrades are spaced apart to accommodate expansion and contraction due to temperature changes. Connected by connecting members, and both ends of the connecting members are engaged with the open ends of the fixed and movable caps, respectively, so that they will not come off even if the movable or fixed caps are subjected to tensile force due to a car collision, etc. It is.

(Function) One end of the connecting member is engaged with the open end of the fixed cap and the other end is engaged with the open end of the movable cap so that both caps can respond to temperature changes. Alternatively, even if a tensile force is applied to the fixed cap due to an automobile collision, etc., this engagement is prevented from coming off.

(Example) An expansion joint for a handrail according to the present invention is shown in FIGS. 1 to 7. The cap 1 constituting the balustrade is formed of a round or square hollow pipe, and is supported and fixed approximately parallel to the road surface by a plurality of pillars, for example, pillars 2a and 2b. The cap 1 is composed of a fixed cap 1a and a movable cap 1b, and the spacing (L ₁ ) is set so that both caps can respond to expansion and contraction due to temperature changes.
They are connected with a connecting material across them. Reference numerals 5a and 5b are floor slabs laid on a road bridge, and a joint portion 6 allows adjustment of expansion and contraction of the floor slabs due to temperature changes. Although the fixed cap 1a is short and the movable cap 1b is long, the cap 1 may have substantially the same length. Reference numeral 7 denotes a cover for the extendable portion, and this cover 7 is fixed to either the fixed cap 1a or the movable cap 1b. Furthermore, if a horizontal crosspiece (not shown) is provided below the cap 1, this horizontal crosspiece also has the same configuration as the cap 1.

Each example will be described in detail below. In addition,
The same reference numerals are used for common members in each embodiment.

[Example 1] This example is shown in FIG. 1a, and a joint pipe 10 is used as the connecting member. The rear end of the joint pipe 10 with the outward locking piece 8 formed at the tip is fixed to the open end of the fixed cap 1a, and the tip of the joint pipe 10 is fixed to the open end of the fixed cap 1b.
(See Figure 1). An inward locking piece 9 is formed at the open end of the movable cap 1b, so that even if external force due to a car collision or the like is applied to the movable cap 1b or the fixed cap 1a and a tensile force is exerted on each other, the joint pipe 10 will not face outward. The locking piece 8 and the inward locking piece 9 of the movable cap 1b engage with each other. Therefore, the expansion joint does not come off due to external forces such as a collision of the automobile, and can prevent the automobile from deviating from a road bridge or the like.

The outward locking piece 8 is formed by folding the tip of the joint pipe 10 outward. The joint pipe 10 is fixed to the open end of the fixed cap 1a via a cylindrical fixing member 11. Fixed member 1
The outer diameter of the fixing member 11 is approximately the same as the inner diameter of the fixed cap 1a, and a small diameter cylindrical portion 11a is provided at the front of the fixing member 11.
is extended, and a female thread 11b is formed on the inner peripheral surface of this small diameter cylindrical portion 11a. Further, a male thread 10a is formed on the outer circumferential surface of the rear end of the joint pipe 10 to be screwed into the female thread 11b. The fixing member 11 is fitted into the open end of the fixed cap 1a and welded 12 thereto. 13 is a bolt that connects the fixing member 11, the fixing cap 1a, and the cover 7;
is Natsuto. In this way, the fixing means for fixing the fixing member 11 and the fixing cap 1a may be a combination of welding 12 and bolt/nut tightening, or only one of them may be used. Further, other fixing means such as screw fitting, screw fixing, etc. may be used. The joint pipe 10 is guided inside the movable cap 1b by arrow A.
The rear end of the joint pipe 10, which is inserted from the opposite direction and protrudes from the open end of the movable cap 1b, is screwed into the small diameter cylindrical portion 11a of the fixed member 11 to be fixed. Note that a female thread may be formed on the inner peripheral surface of the rear end portion of the joint pipe 10, and a corresponding male thread may be formed on the outer peripheral surface of the small diameter cylindrical portion 11a. Further, the configuration of the fixing member 11 is not limited to the above-described one, and the rear end portion of the joint pipe 10 may be directly fixed to the open end portion of the fixed cap 1a. The rear end of the joint pipe 10 is fixed to the Kasagi 1a
When fixed to the open end of the joint pipe 10, the outward locking piece 8 of the joint pipe 10 and the inward locking piece 9 of the movable cap 1b are separated by an appropriate distance. The range in which the cap 1 can expand and contract is the length (L ₂ ), and this length is determined by the length of the joint pipe 10. Therefore, even if a tensile force is applied to the movable cap 1b or the fixed cap 1a due to an external force such as a car collision, the outward locking pieces 8 of the joint pipe 10 and the inward locking pieces 9 of the movable cap 1b are The joint pipe 10 and the movable cap 1b are engaged and cannot be separated from each other.

Note that FIG. 1b is a longitudinal sectional view showing another embodiment of the outward locking piece 8 of the joint pipe 10 and the inward locking piece 9 of the movable cap 1b. In this embodiment, a plurality of notches 16 are formed at regular intervals in the outward locking piece 8 and the inward locking piece 9 in order to facilitate the insertion of the joint pipe 10 into the movable cap 1b. It is. When the outward locking piece 8 of the joint pipe 10 is inserted into the notch 16 of the movable cap 1b and rotated at an appropriate angle, the outward locking piece 8 and the inward locking piece 9 will be connected. It can be set in a position where it can be engaged.

[Example 2] This example is shown in FIGS. 2a and 2b, and a wire rope 20 is used as the connecting member.
Ring fittings 21a are attached to both ends of the wire rope 20,
21b is fixed by means such as welding. One of the ring fittings 21a is a knock pin 22a which is fixed through the end of the fixed cap 1a between the opposing side walls.
The other ring fitting 21b is inserted and supported by a knock pin 22b which is fixed and penetrated between opposing side walls at the end of the movable cap 1b.
When both the ring fittings 21a and 21b are supported by the knock pins 22a and 22b, respectively, and the atmospheric temperature does not affect the expansion and contraction of the cap 1, the wire rope 20 is bent by an appropriate length. There is. 15 is a screw that fixes the cover 7.

[Embodiment 3] This embodiment is shown in FIG. 3, and a bellows joint 30 is used as the connecting member. Cylindrical mounting members 31a, 3 are provided at both ends of the bellows joint 30.
1b is fixed. Mounting members 31a, 31b
A pin insertion hole 32 is formed in each opposing side wall. One mounting member 31a is supported by a knock pin 22a at the open end of the fixed cap 1a,
The other mounting member 31b is supported by a knock pin 22b at the open end of the movable cap 1b. This support connects the dowel pins 22a, 22b to the mounting member 31a,
This is done by penetrating the pin insertion hole 32 of 31b. The bellows joint 30 may be directly attached to the open ends of the fixed cap 1a and the movable cap 1b without using the attachment members 31a, 31b.

[Embodiment 4] This embodiment is shown in FIGS. 4a and 4b, and a joint pipe 40 is used as the connecting member.
The joint pipe 40 has elongated holes 41, 41 formed in opposite side walls at the tip thereof. Joint pipe 4 formed in this way
The rear end of 0 is fixed to the open end of the fixed cap 1a, and the tip is inserted into the movable cap 1b, and the dowel pin 22b is inserted into the long holes 41, 41, and the joint is inserted through the dowel pin 22b. A pipe 40 is engaged with the open end of the movable cap 1b. The movable cap 1b can expand and contract within the length of the elongated hole 41. The rear end of the joint pipe 40 and the opening end of the fixed cap 1a can be fixed by means of welding 12, as well as by dowel pins, bolts, etc.
It may also be one using nuts or the like.

[Embodiment 5] This embodiment is shown in FIG. 5, and a rod-shaped metal fitting 50 is used as a connecting member. Rod-shaped metal fittings 50
The entire body is formed into a substantially U-shape, and both tip portions are folded back outward to form outward locking pieces 51, 51. A bent base 50a of the rod-shaped metal fitting 50 is inserted into the open end of the fixed cap 1a, and a knock pin 22a is inserted through this bent base 50a. Therefore, the rear end of the rod-shaped metal fitting 50 is connected to the knock pin 2.
It is engaged with the open end of the fixed cap 1a via 2a. The tip of the metal rod 50 is inserted into the open end of the movable cap 1b. The open end of the movable cap 1b is folded back inward, and this folding forms an inward locking piece 9, and the rod-shaped metal fitting 50 engages with the outward locking pieces 51, 51 formed at the tip. It has been made possible.

[Embodiment 6] This embodiment is shown in FIG. 6, and a chain 60 is used as the connecting member. One end 60a of the chain 60
is engaged with the fixed cap 1a via a knock pin 22a. The other end 60b of the chain 60 is a movable cap 1b
It is connected to a sliding body 61 that slides inside.
The sliding body 61 may be spherical. A stopper 62 having an insertion hole 63 for a chain 60 formed in the center is attached to the open end of the movable cap 1b. The stopper 62 may be attached by any means such as screw fitting, welding, screw fixing, etc.

[Embodiment 7] This embodiment is shown in FIG. 7, and uses a rod 70 with male threads 71a and 71b formed at both ends as a connecting member. A bracket 73 having an insertion hole 72 for a rod 70 in the center is attached to the open end of the fixed cap 1a. The means for attaching the bracket 73 may be any one of screw fitting, welding, screw fixing, etc. 74 is a fixing nut fixed to the bracket 73, and 75 is a tightening nut. A male threaded portion 71a formed at one end of the rod 70 is inserted into the insertion hole 7 of the bracket 73.
2 and is locked with a fixing nut 74 and a tightening nut 75. Also. A male screw portion 71b formed at the other end of the rod 70 is inserted into the movable cap 1b through the insertion hole 63 of the stopper 62. The sliding body 61 is attached to the male threaded portion 71b. A through hole 61a is formed in the center of the sliding body 61, and a male threaded portion 71b is inserted through the through hole 61a and held by a nut 76.

(Effects of the invention) In the expansion joint of the balustrade of this invention, the fixed cap and the movable cap are connected so that they can respond to expansion and contraction due to temperature changes, and tensile force is applied to the cap by external force in the event of a car collision, etc. The connecting materials prevent the two caps from coming apart even when the caps are in place. Therefore, the strength function of the handrail is guaranteed and road traffic safety is improved. Furthermore, even if either the fixed cap or the movable cap is damaged, it can be easily replaced.

[Brief explanation of the drawing]

Figures 1 to 7 show examples of the expansion joint for the railing according to the present invention, Figure 1a is a longitudinal cross-sectional side view showing the main parts of Example 1, and Figure 1b is a joint formed at the tip of the joint pipe. A vertical sectional front view showing another embodiment of the outward locking piece and the inward locking piece formed at the opening end of the movable cap, FIG. 2a is a vertical sectional plan view of the second embodiment, and FIG. 2b is the same. 3 is a vertical side view of Example 3, FIG. 4a is a vertical plan view of Example 4, and FIG. 4B is a vertical side view of Example 3.
5 is a longitudinal sectional side view of the fifth embodiment, FIG. 6 is a longitudinal sectional plan view of the sixth embodiment, FIG. 7 is a longitudinal sectional side view of the seventh embodiment, and FIG. 8 is a longitudinal sectional view of the conventional example. FIG. 1...Kasagi, 1a...Fixed Kasagi, 1b...Movable Kasagi, 2a, 2b...Post, 7...Cover, 8...
...Outward locking piece, 9...Inward locking piece, 10...
Joint pipe, 20...Wire rope, 2
2a, 22b... Knock pin, 30... Bellows joint, 40... Joint pipe, 41... Elongated hole, 50... Bar-shaped metal fitting, 60... Chain, 61... Sliding body, 70... Bar rod.

Claims (1)

[Claims for Utility Model Registration] 1. The caps that make up the balustrade consist of fixed caps and movable caps, and these caps are connected by connecting materials at intervals to accommodate expansion and contraction due to temperature changes. An expansion joint for a balustrade, characterized in that both ends of the connecting member are engaged with the open ends of the fixed cap and the movable cap, respectively, so that the fixed cap does not come off even if a tensile force is applied to the fixed cap due to a collision of a car or the like. 2 A joint pipe with an outward locking piece formed at its tip is used as a connecting member, the rear end of the joint pipe is fixed to the open end of the fixture, and the tip is inwardly engaged with the open end. An expansion joint for a balustrade according to claim 1, which is movably inserted into a movable cap board on which a stopper is formed. 3. The expansion joint for a balustrade according to claim 1, wherein a wire rope is used as the connecting member, and both ends of the wire rope are attached to the open ends of the fixed cap and the movable cap, respectively. 4. The expansion joint for a balustrade according to claim 1, wherein a bellows joint is used as a connecting member, and both ends of the bellows joint are attached to the open ends of a fixed cap and a movable cap, respectively. 5 A joint pipe with elongated holes formed in opposite side walls at the tip is used as a connecting member, the rear end of the joint pipe is fixed to the open end of the fixing fitting, and the tip is fixed to the opening of the movable cap. The expansion joint for a balustrade according to claim 1, which is movably inserted into the end portion and engaged with the movable cap by a knock pin passing through a long hole. 6. A generally U-shaped rod-shaped metal fitting with both ends folded outward to form an outward locking piece is used as a connecting member, and the bent base of the rear end of the rod-shaped metal fitting is connected to the opening end of the fixed cap. 2. The expansion joint for a balustrade according to claim 1, which is fixed to a balustrade and is movably inserted into an open end of a movable cap whose tip has an inward locking piece formed at the open end. 7. A chain is used as a connecting member, and the chain is inserted into the movable cap through the insertion hole of a stopper with one end fixed to the open end of the fixed cap and the other end fixed to the open end of the movable cap; The expansion joint for a balustrade according to claim 1, wherein a sliding body adapted to be engaged with the stopper is attached to the other end of the chain. 8. A rod with male threads formed at both ends is used as a connecting member, and the rod has one end fixed to the open end of the fixed cap and the other end fixed to the open end of the movable cap. 2. The expansion joint for a balustrade according to claim 1, which is inserted into a movable balustrade through the insertion hole of the rod, and has a sliding body attached to the other end of the rod.