JP2538357B2 - Pipe material connection device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe material connecting device used for connecting safety handrail pipes arranged along a conveyor line, for example.

(Prior Art and Problems Thereof) This type of connecting device is described, for example, in Japanese Patent Application Laid-Open No. 51-4824 and Japanese Utility Model Application No. 50-86557 (Japanese Utility Model Publication No. 52-1972). As described above, a screw for moving both connecting members away from each other at least at two positions in the length direction of a pair of connecting members inserted in an overlapping state between two pipe members to be concentrically connected. There is known a pipe material connecting device provided with a fitting portion that prevents relative movement of both connecting members in the longitudinal direction.

However, in the conventional pipe material connecting device of this type, since both connecting members cannot be forcibly moved closer to an approaching state where they can be inserted into the pipe material by the screw and kept as they are, It is necessary to grasp both connecting members with fingers and bring them closer to each other, which is poor in workability.

In addition, in order to prevent the connecting members from moving apart from each other in the direction orthogonal to the length direction and becoming separated during transportation or storage before use or handling during use. As described in Japanese Laid-Open Patent Publication No. 51-4824, a connecting component other than a screw for moving both connecting members apart is used, and one end of the connecting component is used as one connecting member. It is necessary to fix and connect the other connecting member to the other end side of the connecting component so that it can be relatively moved within a certain range in the perspective direction with respect to the one connecting member. In addition, there is a drawback that the manufacturing cost is very high.

(Means for Solving the Problem) The present invention is intended to provide a pipe material connecting device capable of solving the above-described conventional problems, and the means will be referred to in the embodiments described later. When indicated by reference numerals, a pair of connecting members 1, which are inserted in an overlapping state between two pipe members 14 and 15 which are to be connected concentrically,
Two connecting members at least at two points in the length direction of 2
Screws 10 and 11 for moving the connecting members 1 and 2 away from each other and relative movement in the longitudinal direction of the connecting members 1 and 2 that are engaged with each other when the connecting members 1 and 2 are moved closer to each other. In the pipe material connecting device having fitting portions 12 and 13 for preventing the above, the pair of connecting members 1 and 2 include small width portions 6a and 7a and large width portions.
Dharma-shaped engaging holes 6 and 7 in which 6b and 7b are connected in the lengthwise direction of the connecting members 1 and 2 and screw holes 8a and 9a are the screw 10 and 1 respectively.
Provided so as to face each other at the position of 1, each screw 10, 11 is a screw shaft portion 10a, 11a screwed into the screw hole 8a, 9a, and a large width portion 6b of the dharma-shaped engagement hole, Heads 10b and 11b penetrating 7b and narrow width portions 6a and 7a of the dharma-shaped engagement hole.
And a pair of connecting members 1 and 2 for connecting the pair of connecting members 1 and 2 to each other by the forward and reverse rotation operations of the respective screws 10 and 11.
It is configured such that the forced relative approaching and separating movement is possible between the approaching position where the fitting portions 12 and 13 are separated from each other and the approaching position where the fitting portions 12 and 13 are separated from each other.

(Example) Hereinafter, one example of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 4, reference numerals 1 and 2 denote a pair of connecting members, and the left and right side edges 3 and 4 along the length direction are curved to the same side, and the curved side edges 3 and 4 are A recessed groove portion 5 is provided in the middle along the length direction. Then, at two places near both ends in the length direction of the one connecting member 1, the narrow width portions 6a, 7a are formed.
a and the large width portions 6b, 7b are provided in the recessed groove portion 5 in the same direction with the Dharma-shaped engaging holes 6, 7 in which the connecting member 1 is continuously provided in the longitudinal direction of the connecting member 1, and the other connecting member is provided. In FIG. 2, nuts 8 and 9 fixed to the back surface side of the recessed groove portion 5 are used to penetrate through screw holes that face the narrow width portions 6a and 7a of the dharma-shaped engagement holes 6 and 7.
8a and 9a are provided.

Reference numerals 10 and 11 denote a pair of screws, which can penetrate the screw shaft portions 10a and 11a screwed into the through screw holes 8a and 9a and the large width portions 6b and 7b of the dharma-shaped engagement holes 6 and 7, respectively. It is provided with heads 10b, 11b and necks 10c, 11c capable of engaging with the narrow width parts 6a, 7a of the dharma-shaped engagement holes 6, 7, and the screw shaft parts 10a, 11a have a rotation operation groove 10d at their tips. , 11d are formed.

Reference numerals 12 and 13 denote fitting portions formed on the respective side edges of the curved side edges 3 and 4 at the central position in the length direction of both the connecting members 1 and 2, and are fitted on the connecting member 1 side. The portion 12 is recessed, and the fitting portion 13 on the side of the connecting member 2 is projected so that it can be fitted into the recessed fitting portion 12.

Prior to use, the through screw hole 8 of one connecting member 2
a, 9a The screw shaft portions 10a, 11a of the screws 10, 11 are shallowly screwed together, and the other connecting member 2 is connected to the large width portions 6b, 7b of the Dharma type engagement holes 6, 7 thereof.
Is superposed on one connecting member 1 so that the heads 10b and 11b of the screws 10 and 11 penetrate from the inside, and as shown in FIGS. 1 and 2, the necks 10c of the screws 10 and 11 are The connecting members 1 and 2 are relatively moved in the longitudinal direction so that the connecting portions 11 and 11c engage with the narrow width portions 6a and 7a of the duller-shaped engaging holes 6 and 7. At this time, since the fitting portions 12 and 13 of the connecting members 1 and 2 are not fitted to each other, relative movement of the connecting members 1 and 2 in the longitudinal direction is allowed. In such a state, the two screws 10, 11 are screwed into the through screw holes 8a, 9a to bring the connecting members 1 and 2 close to each other as shown in FIGS. The fitting portions 12 and 13 of the members 1 and 2 are fitted to each other.

In the state where the connecting members 1 and 2 are combined as described above, since the fitting portions 12 and 13 are fitted to each other, relative movement of the connecting members 1 and 2 in the longitudinal direction is prevented. Has been done. Therefore, the neck portions 10c and 11c of the screws 10 and 11 move from the small width portions 6a and 7a to the large width portion 6b of the dharma-shaped engagement holes 6 and 7 by the relative movement of the connecting members 1 and 2 in the length direction. , 7b, and the heads 10b, 11b of the two screws 10, 11 are made into the large width portions 6 of the dharma-shaped engagement holes 6, 7.
The connecting members 1 and 2 will not separate from each other by being separated from b and 7b.

In use, as shown in FIGS. 5 and 6, as shown in FIGS. 5 and 6, the connecting members 1 and 2 combined in the approaching state in which the fitting portions 12 and 13 are fitted to each other as described above are concentrically arranged. After half-inserting between the two pipe members 14 and 15 to be connected, the two screws 10 and 11 are previously attached to both pipe members 14 and 15.
Using a screwdriver that engages both screws 10 and 11 with the rotation operation grooves 10d and 11d through the through holes 16 and 17 provided so as to face each other, the screw 10 and 11 are separated from the through screw holes 8a and 9a. Rotate in the direction you want. The screws 10 and 11 are the neck 1
By 0c, 11c and the narrow width portions 6a, 7a of the dharma-shaped engagement holes 6, 7,
Since it is rotatable with respect to the connecting member 1 but engaged in the axial direction, the screws 10, 11 move in the disengagement direction with respect to the through screw holes 8a, 9a on the connecting member 2 side. Connection member
As a result, the curved side edges 3 and 4 of the connecting members 1 and 2 are brought into pressure contact with the inner peripheral surfaces of the pipe members 14 and 15, respectively, and the frictional force between them causes the frictional force between them. Pipe material 14,1
The 5 can be connected and integrated concentrically with each other.

In addition, the screws 10 and 11 may form a rotation operation portion on the side of the heads 10b and 11b.

(Operation and Effect of the Invention) As described above, according to the pipe material connecting device of the present invention, a pair of connecting members are inserted in an overlapping state between two pipe materials to be concentrically connected, and both connection members are connected. Rotating each screw interposed between the members for use, for example, through a through hole provided in advance in the pipe material as in the embodiment,
By moving the connecting members away from each other, both ends of the connecting members are brought into pressure contact with the inner peripheral surfaces of the pipe members, whereby the friction force between the pipe members and the connecting members is increased. Although they can be connected and integrated concentrically with each other, the maximum effect is in the following points.

That is, before use, the neck portion of the screw screwed into the screw hole of the one connecting member and the narrow width portion of the dharma-shaped engaging hole of the other connecting member are engaged with each other, and the fitting of both connecting members is performed. By fitting the mating portions together, the two connecting members relatively move in the lengthwise direction in a state where they are placed close to each other, that is, in a state in which they can be inserted into the pipe material, It is possible to connect and integrate them in a state where they cannot be separated and moved in a direction orthogonal to the length direction.

Therefore, it is possible to prevent the connecting members from being separated from each other during transportation or storage before use, and the transportation and storage operations can be performed very easily. Of course, since both connecting members are held in an overlapping state so that they can be inserted into the pipe material, they can be inserted into the pipe material as they are, and handling at the time of use is very easy, and the connection work can be performed efficiently.

Moreover, since a specially shaped screw having a head and a neck is used, and only a daruma-shaped engaging hole and a screw hole are provided on the connecting member side, the number of parts does not increase,
The structure of the entire device is very simple and can be manufactured at low cost.

[Brief description of drawings]

1 is a partially longitudinal side view, FIG. 2 is a partially transverse plan view, FIG. 3 is a partially longitudinal side view of an essential part showing a state in which both connecting members are moved toward each other, and FIG. FIG. 5 is a sectional view taken along the line AA of FIG. 3, and FIG. 5 is a partially longitudinal side view showing a pipe material connection state,
FIG. 6 is a sectional view taken along line BB in FIG. 1,2 ...... Connection member, 3, 4 ...... Curved both sides, 5 ...... Recessed groove part, 6, 7 ...... Dharma type engaging hole, 6a, 7a ...... Dharma type engaging hole small width part , 6b, 7b ...... Drum-shaped engagement hole large width part, 8, 9 ......
Nuts, 8a, 9a ...... Through screw holes, 10,11 …… Screws, 10a, 11
a …… Screw shaft, 10b, 11b …… Head, 10c, 11c …… Neck, 10
d, 11d …… Rotating operation groove, 12,13 …… Mating part, 14,15 ……
Pipe material, 16, 17 ... Through holes.

Claims (1)

(57) [Claims] 1. To move both connecting members away from each other at least at two positions in the longitudinal direction of a pair of connecting members that are inserted in an overlapping state between two pipe members to be connected concentrically. A pipe member connecting device including a screw and a fitting portion that fits each other when the two connecting members are moved closer to each other to prevent relative movement in the longitudinal direction of the two connecting members, In the pair of connecting members, a duller-shaped engaging hole having a small width portion and a large width portion connected in the length direction of the connecting member and a screw hole face each other at the position of each screw. Are provided in such a manner that each screw has a screw shaft portion that is screwed into the screw hole, a head that penetrates a large width portion of the dharma-shaped engagement hole, and a small width portion of the dharma-shaped engagement hole. And a neck portion to be engaged with each other, and the pair of connecting members are connected to each other by a forward / reverse rotation operation of each screw. A proximity position where the fitting portion are fitted to each other, forcing the relative toward and away from movable in and the pipe connecting device comprising between a separated position where the engaging portion is disengaged from one another.