JPH0719403U - Space truss joint device - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Perform work without removing the joint parts when working on the joints of the space truss. [Structure] The hollow end s of the truss constituent member 11 is closed by an end plate 8, a female screw hole is formed in the center of the end plate, and a bolt 4 is inserted into a short pipe 3 screwed into the female screw hole. , The bolt head 4'is arranged in the hollow portion s, the short cylinder 6 for inserting the bolt and the short pipe is arranged on the outer end surface of the end plate, and the short groove is formed in the key groove 1'opened at both ends on the inner surface of the short cylinder. In a mechanism in which a key 1 detachably protruded on a side surface is slidably inserted along a key groove and a short cylinder is rotated to screw a bolt into a female screw hole 10 formed in a joint sphere 9. The key to be inserted into the groove is formed by the male screw 1 ″, the male screw is screwed into the short pipe, the tip of the male screw is engaged with the bolt, and the machine screw 5 is screwed into the female screw hole 5 ″ formed in the short cylinder. Then
Engage the machine screw with the bolt.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for connecting joints in a space truss structure.

[0002]

[Prior art]

 Conventionally, building a three-dimensional truss requires transportation of members, handling work, and work at heights. Therefore, in order to make the joint part a simple mechanism, a mechanism has been developed in which the bolt provided on the end plate of the pipe is screwed into the female screw hole of the joint ball by manual rotation of the sleeve.

In this mechanism, a hollow end of a truss component made of a pipe is closed by an end plate, a female screw hole is bored in the center of the end plate, and a bolt is attached to a short pipe screwed into the female screw hole. A short cylinder (sleeve) in which the bolt and the short pipe are inserted through the outer end face of the end plate, the outer diameter of the bolt head is larger than the inner diameter of the female screw hole, and the bolt head is placed in the hollow part. And a key groove that opens at both ends of the sleeve is formed on the inner surface of the sleeve, and a key that is detachably protruded from the side surface of the short pipe in the key groove is slidable along the key groove. It was a mechanism to connect the truss constituent material (pipe) to the joint sphere by inserting the bolt and screwing the bolt into the female screw hole formed in the joint sphere by rotating the sleeve. 61-42059, JP-A-3-115631).

However, in the above work, the sleeve is removed from the bolt before the bolt is screwed into the female screw hole of the joint ball, and the key to be inserted into the key groove is formed by the pin inserted into the pin hole. Therefore, the pins are likely to fall off at high places, and therefore it is necessary to stop the work at high places or carry a spare sleeve or a spare pin, which lowers the work efficiency and causes a risk of falling off.

[0005]

[Problems to be solved by the device]

 This proposal uses a sleeve (short cylinder) for rotating the bolt and a key pin for rotating the bolt in the sleeve when the connecting bolt provided at the tip of the truss constituent material is screwed into the female screw hole of the joint ball. The purpose is to prevent falling and to quickly and safely connect the joint balls and truss components in the above work.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present proposal is to close the hollow end of the truss component with an end plate, form a female screw hole in the center of the end plate, and bolt a short pipe screwed into the female screw hole. The bolt head is located in the hollow part, and the outer diameter of the bolt head is larger than the inner diameter of the female screw hole, and the short tube through which the bolt and the short pipe are inserted is placed on the outer end surface of the end plate. Then, key grooves extending to both ends are formed on the inner surface of the short tube, and a key that is detachably protruded from the side surface of the short tube is slidably inserted into the key groove along the key groove. In a mechanism in which the bolt is screwed into a female screw hole formed in a joint sphere by rotating, a key to be inserted into the key groove is formed by a male screw, and the male screw is screwed into the short pipe. Insert and insert the tip of the bolt into the bolt to fix the bolt and the short tube in the sliding and rotating directions, and A joint device for a three-dimensional truss that is screwed into a female screw hole formed in a short cylinder, and the small screw is engaged with the bolt to fix the bolt and the short cylinder in the sliding direction and the rotating direction. The joint device for the space truss according to the above invention, in which the convex portion is formed at one end of the screw. The convex portion of the machine screw is engaged with the concave portion formed at the protruding end of the key by the male screw, and the small portion is stopped by the concave portion. A joint device for a space truss according to the second aspect of the present invention, wherein the other end of the machine screw is projected to the outside of the short cylinder when the screw is stopped, and the polygonal engaging portion for screwing is provided on the other end surface of the machine screw. The joint device of the three-dimensional truss according to the first, second or third invention described above. The three-dimensional structure according to each of the first to fourth inventions in which a washer is interposed between the bolt head and the inner surface of the end plate. Composed of truss joint device.

[0007]

[Action]

 In the present invention, the bolt 4 protruding from the outer end surface of the end plate 8 of the truss constituent member 11 and the short tube 3 are moved in the rotating direction and the sliding direction by the tip engagement of the male screw 1 ″ screwed into the short tube 3. It is fixed and integrated (Fig. 1, Fig. 2, Fig. 5).

In this state, the base spiral part 3 ′ of the short tube 3 is screwed into the female screw hole 8 ′ of the end plate 8 as shown in FIG. 1, and the hexagonal short tube 6 (sleeve 6 is attached to the outer end surface of the end plate 8). ), And the projecting end of the male screw 1 ″ is slidably inserted as a key 1 into a key groove 1 ′ that is open at both ends of the short tube 6. The short tube has a recess 2 at this projecting end. The convex portion 5'of one end of the machine screw 5 screwed from the outside of the (sleeve) 6 is engaged with the recess 2 and the engagement of the machine screw 5 is stopped by the engagement.

In this state, the other end 7 of the machine screw 5 projects to the outside of the short cylinder 6 (sleeve). When connecting the bolt 4 at the tip of the truss constituent member 11 to the female screw hole 10 of the joint ball 9 by connecting, first, the tip of the bolt 4 is brought into contact with the female screw hole 10, and then the machine screw 5 is attached in that state. When the short tube 6 (sleeve) is separated from the female screw hole 5 ″ of the short tube 6 by turning with a fingertip, the short tube 6 (sleeve) is freed from the short tube 3 and the bolt 4 and can be freely rotated. When it is rotated to one side, the short tube 3 is rotated via the key 1, and the bolt is formed by the engagement between the tip convex portion 2 ′ of the male screw 1 ″ forming the key 1 and the concave portion 2 ″ on the side surface of the bolt 4. 4 rotates with the short pipe 3, and the bolt 4 can be screwed into the female screw hole 10 of the joint ball 9, thereby connecting the joint ball 9 and the truss component 11 with the bolt 4. (Fig. 1, Fig. 2).

When the bolt 4 is screwed into the female screw hole 10 of the joint ball 9, the bolt head 4 ′ is pressed against the inner surface of the end plate 8 via the washer 12 and the work is completed (FIG. 2).

Further, in FIG. 5, a small screw 5 is screwed into the female screw hole 5 ″, and a small wrench head is fitted into a polygonal engaging portion 13 formed on the other end surface of the small screw 5, and is rotated. As a result, the convex portion 5 ′ at one end of the machine screw 5 is pressed against the side surface of the bolt 4, and the bolt 4 and the short tube 6 can be fixed in the sliding direction and the rotating direction.

[0012]

【Example】

 The end plate 8 is fixed to the hollow end s of the truss component 11 made of steel by welding 8 ″, and the hollow part s is closed.

A large-diameter female screw hole 8'is formed in the center of the end plate 8, and the base spiral portion 3'of the short tube 3 is screwed into the screw hole 8 '. A bolt 4 is inserted through the short pipe 3, a bolt head 4'is arranged inside the hollow portion s, and a washer 12 is arranged between the bolt head 4'and the inner surface of the end plate 8.

As shown in FIG. 3, a female screw hole is formed on the side surface of the tip portion of the short pipe 3, and a male screw 1 ″ is screwed into the screw hole to form a mortar shape on the side surface of the bolt 4. The tip projection 2'of the male screw 1 "is fitted into the recess 2" to integrally fix the bolt 4 and the short tube 3 in the rotating direction and the sliding direction.

The above-mentioned male screw 1 ″ is to project from the short pipe 3 and to make the protruding portion be the key 1. The short pipe 3 (sleeve) is fitted to the short pipe 3 thus constructed, A key groove 1'opened at both ends of the tube 6 is formed, the key 1 is slidably fitted in the key groove 1 ', and the short tube 3 is rotated together with the short tube 6 via the key 1. The short tube 6 can slide in the direction of the short tube 3.

Therefore, as shown in FIG. 3, a small female screw hole 5 ″ communicating with the key groove 1 ′ from the outer surface of the short cylinder 6 is bored, and the small screw 5 is screwed in from the outside of the screw hole 5 ″. The tip conical protrusion 5 ′ of the machine screw 5 is engaged with the recess 2 formed at the outer end of the key 1 to form a screw-in stopper for the machine screw 5, and in this state the machine screw 5 is projected to the outside of the short cylinder 6. Then, the protruding other end 7 can be pinched with a finger to rotate the machine screw 5 in the forward and reverse directions so as to be attached to and detached from the short cylinder 6.

Further, as shown in FIG. 5, the machine screw 5 is screwed into a screw hole 5 ″ formed in the short cylinder 6, and the tip conical protrusion 5 ′ is brought into direct contact with the side surface of the bolt 4 to form a polygonal engagement. By strongly tightening the small screw 5 with a small wrench fitted in the concave portion 13, the projection 5 ′ bites into the side surface of the bolt 4 and engages with the short pipe 6 in the sliding direction and the rotating direction. And the bolt 4 can be fixed, and the small screw 5 can be reversely rotated with a small wrench to separate them.

[0018]

[Effect of device]

 Since the present invention is configured as described above, when connecting the truss constituent material 11 and the joint ball 9 in the space truss structure, the short cylinder 6 is supported by the short pipe 3 or the bolt 4 by the small screw 5 and is separated and dropped. It is difficult, and when the bolt 4 at the tip of the truss constituent material 11 is screwed into the female screw hole 10 of the joint ball 9, it is easy to remove the small screw 5 to rotate the short cylinder 6, and the bolt 4 is jointed accordingly. The ball 9 can be easily screwed into the female screw hole 10 and the key 1 is formed by the male screw 1 ″, so that the key 1 does not fall off and the three-dimensional truss joint work can be performed safely and quickly without trouble. In addition to the above effects, the washer 12 strengthens the tightening force of the bolt head 4 ', and thus the safety can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a joint device of a space truss.

FIG. 2 is a vertical cross-sectional view of a screw-in completed state.

FIG. 3 is a vertical cross-sectional side view of a short cylinder (sleeve) in a fixed state by machine screws.

FIG. 4 is a vertical sectional front view of a machine screw portion.

FIG. 5 is a side view of a direct engagement state between a short cylinder and a bolt.

FIG. 6 is a plan view of the other end surface of the machine screw.

[Explanation of symbols]

 1 key 1'key groove 1 "male screw 2 recessed part 3 short pipe 4 bolt 5 machine screw 5'convex part 6 short cylinder 5" female screw hole 7 other end 13 polygonal engagement part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshinori Tanaka 1194-1 Ogawaramachi, Hyogo-cho, Saga-shi, Saga Inside the Tanaka Iron Works Co., Ltd. 1 Inside the Tanaka Iron Works Co., Ltd.

Claims (5)

[Scope of utility model registration request] 1. A truss-constituting member has a hollow end portion closed by an end plate, a female screw hole is bored in a central portion of the end plate, and a bolt is inserted into a short pipe screwed into the female screw hole. The bolt head is arranged in the hollow portion, the outer diameter of the bolt head is larger than the inner diameter of the female screw hole, and the short cylinder for inserting the bolt and the short pipe is arranged on the outer end surface of the end plate. Forming key grooves extending to both ends on the inner surface of the key, and inserting a key that is detachably protruded from the side surface of the short pipe into the key groove so that the key can be slidably inserted along the key groove to rotate the short tube. In the mechanism for screwing the bolt into the female screw hole formed in the joint sphere, a key to be inserted into the key groove is formed by a male screw, and the male screw is screwed into the short pipe and the tip thereof is attached to the bolt. The bolt and the short pipe are engaged with each other and fixed in the sliding direction and the rotating direction, and a machine screw is formed in the female screw hole formed in the short cylinder. A joint device for a three-dimensional truss that is screwed in and the small screw is engaged with the bolt to fix the bolt and the short tube in the sliding direction and the rotating direction. 2. A protrusion is formed on one end of the machine screw.
(1) The three-dimensional truss joint device described above. 3. The small screw of the machine screw is engaged with the convex part of the machine screw in the concave part formed at the protruding end of the key by the male screw and is stopped by the concave part so that the screw is not screwed. The joint device for a space truss according to claim 2, wherein the other end is projected outside the short cylinder. 4. The joint device for a space truss according to claim 1, wherein a screwdriver polygonal engaging portion is formed on the other end surface of the machine screw. 5. The joint device for a space truss according to claim 1, wherein a washer is interposed between the bolt head and the inner surface of the end plate.