JPH061412U - Seamless joint - Google Patents

Abstract

(57) [Abstract] [Purpose] As a form compressed by the action of a hook, P
After inserting into the joint between the C members and confirming the penetration of the PC steel material, by making it into an expanded shape, the PC steel wire insertion state is sufficiently visually confirmed as a sheath duct connecting member such as the PC member, The inflow of mortar should be completely prevented by accurately responding to the surface gradient and position displacement of the sheath duct. [Structure] The ball chains 14a and 14b are attached to the side plates 11 respectively.
After being inserted into the cover thickness of the PC member to check the penetration of the PC steel material, the ball chain 14a,
14b is removed from the side plates 11a, 11b, and the coil spring 13 can extend the distance between the side plates 11a, 11b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is arranged between the PC beam members or in the joints of the PC beams and the PC columns, and is inserted into the joints in a compressed form by the action of the latch body, and after confirming the penetration of the PC steel material, The present invention relates to a caseless joint intended to be used as a case duct connecting member such as a PC member by filling the joint with grout mortar in an expanded form.

[0002]

[Prior art]

 Conventionally, as a sheath duct connecting member for a narrow joint, a cylindrical pipe connected to one sheath duct is fitted into a cylindrical pipe connected to the other duct, and a spring-shaped rubber is used for connection. The grout mortar filled in the joints leaks from the gap between the joint between the sheath duct and the pipe and enters the inside of the sheath duct, and the joint gap is inclined with respect to the sheath duct. There are problems such as not being able to handle cases. Also, in the method in which each sheath duct is connected by a sponge-shaped bellows-shaped connecting body, the joint is filled with grout mortar to fix the bellows-shaped connecting body, and then the PC steel material is inserted, the PC steel material is a connecting member. There is a problem that the collision position cannot be visually confirmed when it is caught on. In addition, in the system in which an O-ring elastic body is inserted in the joint part in the direction perpendicular to the sheath duct to penetrate the PC steel material, when the PC steel material is caught by the connecting member, the collision position is visually observed. In addition, there is a problem that the shape of the connecting member is large and the strength of the grout mortar filled in the joint is insufficient due to the lack of cross section.

[0003]

[Problems to be solved by the device]

 Therefore, the present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and is provided between the PC beam members or at the joints between the PC beams and the PC columns, and By arranging it in a compressed form inside the joint, and confirming the penetration of the PC steel material, it should be expanded, and by filling the joint with grout mortar, it can be used as a sheath duct connecting member such as a PC member. Since it is connected by a spring material and is equipped with a waterproof material having open cells, it completely prevents the inflow to the connection member, and accurately responds to the surface inclination and displacement of the sheath duct. It is an object of the present invention to provide a caseless joint capable of compactly accommodating in a joint portion between PC members by visually checking the insertion state of PC steel material into a connecting member.

[0004]

[Means for Solving the Problems]

 In view of this, the present invention provides a pair of side plates having openings, an expandable and contractible bellows-shaped connecting body to which the side plates are connected, and a connecting body disposed inside the connecting body to expand and contract the space between the side plates. It consists of a clamped spring body, a pair of hooks connected to each side plate to adjust the internal stress of the spring body, and a buffer provided on both outer sides of the side wall. -It is intended to achieve the above-mentioned object by arranging between the ducts so as to connect between the respective ducts.

[0005]

[Action]

 In the present invention, due to the action of the hook, the gap between the pair of side plates having the opening is compressed and inserted into the cover thickness of the PC member or the like, and after confirming the penetration of the PC steel material, the Since the joints are filled with grout mortar with the side plates extended, the joints are connected between the PC beam members or between the PC beams and the PC pillars by means of springs. Completely prevent the grout mortar filled in the joints from flowing into the joints, accurately respond to the surface gradient and displacement of the sheath duct, and fully visually check the insertion state of PC steel into the joints. It becomes possible to compactly store it within the cover thickness of the PC member.

[0006]

【Example】

 An embodiment will be described below with reference to FIGS. 1 to 4 in order to further clarify the gist of the caseless joint of the present invention. Reference numeral 1 denotes a sheathless joint, which is a pair of circular side plates 11a and 11b having circular openings, and a bellows shape made of elastic rubber or synthetic resin for connecting the side plates 11a and 11b. Of the connecting body 12 and the side plates 11a and 11b, the coil spring 13 disposed inside the bellows-like connecting body 12 for expanding and contracting the space between the side plates 11a and 11b, and the side plates 11a and 11a for adjusting the internal stress of the coil spring 13. A pair of ball chains 14a, 14b connected between the side plates 11b, a bellows-shaped cushioning body 125 made of rubber protruding from the side plate 11a, and a urethane sponge cushion provided on the side plate 11b. It is composed of a body 15. Further, the ball chains 14a, 14b are composed of an arbitrary number of steel balls 141a, 141b and steel wires 142a, 142b penetrating the balls 141a, 141b. On the outer circumferences of the side plates 11a and 11b, there are small hole portions 111a and 111b which are opened to the outside by slits for hooking the balls 141a and 141b, respectively. Can be held in a shortened form.

Next, in order to use the caseless joint 1 as a connecting member between the case duct S1 of the PC member P and the case duct S2 of the girder body K of the bridge, first, the ball chain 14a is used. , 14b balls 141a, 141b are hooked on the small holes 111a, 111b of the side plates 11a, 11b to make the caseless joint 1 in a compressed form, which is the inside of the cover thickness Pk of the PC member P. While inserting the side plate 11a into the case, the PC steel material Pc is accurately penetrated into the caseless joint 1, and the PC steel material Pc is inserted into the case duct S1 and the caseless joint 1. After passing through the sheath duct S2, one end of the ball chains 14a, 14b is removed from the side plates 11a, 11b to relieve the internal stress of the coil spring 13 to release the sheath stress. -As the joint 1 is extended, the side plate 11a is brought into close contact with the PC member P via the bellows-like connecting body 125, and the side plate 11b is brought into close contact with the girder skeleton K via the urethane sponge buffer 15. As a result, it can be effectively used as a connecting member for the sheath duct S1 and the sheath duct S2.

In addition, in the above-mentioned embodiment, the case where it is arranged at one place has been described, but it is arranged at any number of places such as four places, and the covering thickness is a space which is easy to work on the joint portion. If the space is secured, it is not necessary to provide it, and the shape of the side plate is circular, but it may be any shape, and the cushioning body provided on each side plate is made of rubber or urethane sponge However, the shape, size, material, operating method, etc. of each constituent element of the caseless joint according to the present invention will be described in the above-mentioned purpose, function, and later. It is needless to say that each of these changes does not change the gist of the present invention in any way within the scope of achieving the effect of the present invention.

[0009]

[Effect of device]

 As described in detail above, the caseless joint according to the present invention is inserted into the joint between the PC parts in a form in which the distance between the pair of side plates having the opening is compressed by the action of the hooking body. Then, after confirming the penetration of the PC steel material, by filling the grout mortar in the joint with the space between the side plates extended, it is used as a space duct connecting member between PC beam members or between PC beams and PC columns. Since it is connected with a spring material, it completely prevents the grout mortar filling the joints from flowing into the connection part, and accurately responds to the surface gradient and displacement of the sheath duct. Therefore, it becomes possible to visually check the insertion state of the PC steel material into the connection portion and store it in the joint portion compactly. As described above, the present invention is capable of exerting a unique effect which has never been achieved, and is a practical and excellent device.

[Brief description of drawings]

FIG. 1 is a front view showing the present invention in a half section and an outer shape.

FIG. 2 is a plan view of FIG.

FIG. 3 is a bottom view of FIG.

FIG. 4 is an explanatory view showing a construction state of the present invention.

[Explanation of symbols]

 1 series joint 11a side plate 11b side plate 111a small hole part 111b small hole part 12 connecting body 125 buffer body 13 coil spring 14a ball chain 14b ball chain 141a ball 141b ball 142a steel wire 142b Steel wire 15 Buffer body K Bridge girder drive body P PC member Pk PC member Cover thickness Pc PC Steel material S1 sheath duct S2 sheath duct

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Atsushi Anzai 109 109 Kibune, Meito-ku, Nagoya, Aichi

Claims (1)

[Scope of utility model registration request] 1. A pair of side plates having an opening, an expandable and contractible bellows-like connecting body for connecting the side plates, and a pair of side plates disposed inside the connecting body for expanding and contracting a space between the side plates. The two body ducts are composed of a spring body, a pair of hooks connected between the side plates to adjust the internal stress of the spring body, and a cushioning body provided on both outer sides of the side wall. Installed between each sheet
A sheath characterized by being designed to connect between ducts
Thresh joint.