JPH0847442A - Gripping mechanism for pipe or the like and pipe-connecting device using same - Google Patents

Abstract

PURPOSE:To provide a gripping mechanism wherein the release of a locking can be easily done even after a continuous locked condition for a long period of time, and in addition, the locking and the release of the locking can be done by one touch motion. CONSTITUTION:A pipe gripping mechanism consists of a thin cylindrical supporting part 3 made of a synthetic resin which is integrally provided on a base part 2 and a clamping apparatus 4 which is fitted on the periphery of the supporting part. The supporting part 3 has an internal diameter which is the same as the external diameter of a pipe P to be fitted, and on which a longitudinal slit 6 which extends from an opening end 5 in the longitudinal direction, and a lateral slit 7 which extends in the circumferential direction from the end of the longitudinal slit 6 are formed. In addition, on the external surface of a deforming part 8 which is partitioned by the L-shaped slits 6, 7, a tapered surface 10 is formed. On the clamping apparatus 4, a longitudinal protruding line 12 to deform the deforming part 8 inward in the radial direction is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grip mechanism such as a pipe, a grip device, a connecting device such as a pipe, a telescopic double pipe structure, and an assembling pipe furniture using them.

[0002]

2. Description of the Related Art Conventionally, in an assembled furniture such as a hanger, a pipe and other members are detachably connected by a joint having a grip mechanism in order to reduce a packing volume and facilitate an assembling work. It has been practiced to adopt a telescopic double pipe in which two pipes are telescopically joined by joints having the grip mechanism at both ends. In such a joint, as shown in FIG. 15, a short pipe 102 made of synthetic resin is provided on a mating member 101,
A slit 103 is formed in a cross shape on the opening side of the short pipe 102.
Is formed into four parts, a male screw 104 is formed at the base of the short pipe 102, and the tip side of the short pipe 101 is
The thin collet 105 has a tapered surface that becomes thinner toward the tip. And the pipe 10 in the short pipe 102
6 is inserted, a tightening nut 109 having a female thread 107 to be engaged with the male thread 104 and a tapered surface 108 to be fitted with the surface of the collet 105 is tightened onto the short pipe 102 to reduce the inner diameter of the collet. , Pipe 106
Is coupled to the mating member 101. See also FIG.
The joint 110 shown in FIG. 6 is provided with a pair of short tubes 102a and 102b (same as in FIG. 15) having different inner diameters at both ends.
Two corresponding tightening nuts 109a, 10
9b connects the two pipes 106a and 106b in an arbitrary stretched state.

[0003]

The grip mechanism of the pipe using the collet can obtain a strong gripping force as the nut rotates, but on the other hand, when the grip of the joint once connected is unlocked, for example, at the time of shipping. When the consumer unlocks two pipes locked in a contracted state to extend the pipes for assembly, or unlocks the furniture once assembled or adjusts the height. In doing so, there is a case where the collet or the like changes with time, and therefore the tightly tightened nut 109 cannot be loosened. In order to deal with such a problem, for example, a stopper that prevents the nut 109 from moving in the axial direction may be provided in the short pipe 102 to limit the tightening force of the nut. It may not be possible to lock it tightly. Further, the conventional gripping mechanism cannot obtain a firm gripping force unless the nut is rotated many times, which makes assembly and disassembly work troublesome.

The present invention solves the above-mentioned problems of the conventional gripping mechanism, can maintain the proper grip or locking action, and can be easily unlocked even after a long period of time after assembly. It is a technical object to provide a grip mechanism, a grip device, a connecting device such as a pipe, a telescopic double pipe structure, and an assembling pipe furniture that are simple and easy to handle.

[0005]

A grip mechanism for a pipe or the like according to the present invention has an inner diameter for accommodating a pipe or the like to be attached, and has a base end which is elastic and is fixed to a mating member. A vertical slit extending from the free end to the vicinity of the base in a direction parallel to the axial center, and a base end of the vertical slit. A lateral slit continuously extending in the circumferential direction from the end on the side is formed, and on the inner surface of the fastener, a rectangular deforming portion of the supporting portion, which is defined by a vertical slit and a lateral slit, is formed. It is characterized in that a protrusion for pressing inward in the radial direction is formed. The set of the vertical slit and the horizontal slit may be one set,
Multiple sets such as two sets or three sets may be provided.

The protrusion on the inner surface of the fastener may be a protrusion that fits into the vertical slit of the supporting portion and can ride on the edge of the deforming portion. It is preferable that one or both of the outer surface of the deformable portion and the inner surface of the protrusion be formed with a tapered surface that pushes the deformable portion inward as the fastener is rotated toward the root side of the deformable portion. Furthermore, it is preferable that the inner surface of the fastener is provided with a protrusion that floats in the lateral slit. Further, when a strong gripping action is required, it is more preferable to interpose a flexible and elastic sheet having a high friction coefficient between the fastener and the support portion.

The grip device for a pipe or the like according to the present invention comprises a ring-shaped or pipe-shaped base material having an inner diameter for accommodating a pipe or the like to be attached, and concentrically with the base material, and integrated with one end of the base material. And the grip mechanism having a support portion provided in the. Further, the first aspect of the connecting device for pipes and the like of the present invention has two sets of the above-mentioned grip devices, and the free ends of the base materials are integrally connected to each other, and the lateral sides of the first grip device are connected together. With a slit,
It is characterized in that the lateral slits in the second grip device face in mutually opposite directions. In that case, the first grip device is configured to hold a pipe having a predetermined inner diameter and a predetermined outer diameter, and the second grip device holds a small diameter pipe or the like slidably accommodated in the pipe. The inner holes of the base material may be communicated with each other through the step.

A second aspect of the coupling device of the present invention comprises the above-mentioned grip device and the above-mentioned grip mechanism in which the support portion of the grip device is integrally provided in series at the tip end side of the support portion. The grip device is configured to hold a pipe having a predetermined outer diameter, and the grip mechanism holds a small diameter pipe or the like slidably accommodated in the pipe. In this case, it is preferable that the lateral slits of the grip device and the lateral slits of the grip mechanism are oriented in the same direction, and that the fastener of the grip device and the fastener of the grip mechanism are integrally connected. The base material, the support portion, and the fastener can all be members made of synthetic resin.

A first aspect of the expandable double pipe structure of the present invention is for holding the first pipe, the second pipe slidably accommodated in the first pipe, and the second pipe. The grip device is characterized in that the ring-shaped or pipe-shaped base material of the grip device is concentrically fixed to the open end of the first pipe. Also the second
The expandable double pipe structure of the first aspect includes a first pipe, a second pipe slidably accommodated in the first pipe, and a first pipe.
And a connecting device for elastically connecting and holding the second pipes to each other, and the connecting device is concentrically fixed to the open end of the first pipe by the first grip device or the grip device. Is characterized by. The assembled pipe furniture of the present invention employs any one of the above-mentioned expandable double pipe structures as a pair of columns supported in parallel with each other, or the grip mechanism such as the pipe described above as a structural component and a structural material. It is characterized by being adopted for connection with the pipe of.

[0010]

In the grip mechanism of the present invention, the supporting portion is separated from other portions by the deformed portion, that is, the vertical slits and the horizontal slits arranged in an L shape, and the other portion is separated at the portion parallel to the central axis. The cylindrical rectangular portion connected to the portion can be flexibly deformed so as to be wound around the central axis. When the fasteners are not attached, or when the protrusions are fitted in the vertical slits or placed on the tip side where they do not mesh strongly with the deformed parts, the deformed parts are not subjected to strong inward force by the protrusions. Do not tighten the pipe etc. inserted in the section. Then, when the fastener is rotated to the side of the deformed portion to some extent, the protrusion strongly engages with the deformed portion. Therefore, the deformed portion is deformed so as to be rolled inward while maintaining its cylindrical shape, and the diameter tends to be somewhat reduced. Therefore, the entire deformed portion comes into contact with the surface of the pipe or the like and firmly grips the pipe. At this time, the support portion is supported outward from the inside by a pipe or the like,
Since the fastener is pulled from the opposite side of the pipe or the like via the support portion, the protrusion enters into the upper surface of the deformed portion in a wedge shape, so to speak, and provides a strong gripping force. However, the large deformation locally does not occur in the deformed portion itself.

On the other hand, in order to release the grip, the fastener is slightly rotated in the opposite direction. Then, the strong engagement between the protrusion and the deformable portion is released, and the grip action is released. As described above, since the deformed portion itself does not have large bending deformation or torsional deformation, it does not deform over time even if it is locked for a long period of time. Therefore, it can be easily unlocked. Also, since no screws are used, only a slight rotation of the fastener is required, and the locking and unlocking operations are extremely easy.

In such a grip mechanism, when a plurality of sets of vertical slits and horizontal slits are provided, the action of tightening the pipe or the like works relatively evenly on the circumferential surface. When the projection is a projection that fits into the vertical slit,
When the ridge is dropped into the vertical slit of the supporting portion, it does not engage with the deforming portion at all, and no grip action occurs. Then, when the fastener is rotated, the ridge rides on the edge of the deformed portion and presses the free end of the deformed portion inward, and immediately exerts a grip action. If you rotate the fastener backwards,
The ridge falls into the vertical slit, and the grip action is immediately released. When a taper surface is provided on either one or both of the outer surface of the deformable portion and the inner surface of the protrusion, the tightening action increases with the rotation of the fastener, so that the operation of strengthening or weakening the grip force is easy. When a tapered surface is formed on either or both of the outer surface of the edge of the vertical slit or the inner surface of the ridge, it is easy to ride on the edge of the ridge, so that the lock operation and the unlock operation can be performed. It will be easier. Further, when the inner surface of the fastener is provided with a protrusion that floats in the lateral slit, the fastener does not easily drop from the support portion, which facilitates handling.

In the grip device, the connecting device, the expandable double pipe structure and the assembled furniture of the present invention, since the support portion and the fastener firmly support the pipe or the like inserted in the base material, the support action and the support by the base material. With the holding action of the portion, it is possible to reliably hold the pipe and the like.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The grip mechanism, grip device, connecting device, telescopic double pipe structure and assembled furniture of the present invention will be described below with reference to the drawings. 1 is a perspective view of an embodiment of a grip mechanism of the present invention before assembly, FIG. 2 is a side view of the grip mechanism of FIG. 1 with a part thereof cut away, and FIG. 3 is an assembled state of the grip mechanism of FIG. -III line sectional view, FIG. 4 is an enlarged sectional view of an essential part of the grip mechanism of FIG. 3, and FIG. 5 is FIG.
FIG. 6 is an enlarged sectional view showing an essential part of the grip mechanism in a locked state, FIG. 6 is a perspective view showing an embodiment of a connecting device of the present invention, and FIG. 7 is a sectional view showing an embodiment of a telescopic double pipe structure relating to the present invention. FIG. 8 is a perspective view showing another embodiment of the connecting device of the present invention, and FIG. 9 is a cross-sectional side view of essential parts showing an embodiment of the connecting device of the present invention and a telescopic double pipe structure using the same. 10 and 11 are perspective views each showing an embodiment of the assembled pipe furniture of the present invention, FIG. 12 is a perspective view showing still another embodiment of the connecting device of the present invention, and FIG. 13 is a vertical sectional view of the device of FIG. FIG. 14 is a perspective view showing still another embodiment of the grip mechanism of the present invention.

FIG. 1 shows an example in which the grip mechanism of the present invention is applied as a coupling mechanism between a base B of an assembling hanger hook (see FIGS. 10 and 11) and a pipe P fixed at a right angle to the base B. Is shown. In the grip mechanism 1 of FIG. 1, reference numeral 2 is a cylindrical base portion that projects laterally from the base B, and a thin-walled cylindrical support portion 3 having the same inner diameter as the outer shape of the pipe P is concentrically provided on the base portion 2. It is provided integrally. Base B, base 2 and support 3
Is usually integrally molded from a synthetic resin having high strength and high durability such as polyacetal, polycarbonate and polyamide resin. However, the base portion 2 or the support portion 3 may be molded separately and joined together with an adhesive or the like. Further, general-purpose resins such as polyvinyl chloride and polyethylene may be adopted. Reference numeral 4 in FIG. 1 is a fastener fitted to the outer periphery of the support portion 3, and can be molded of the same synthetic resin as described above.

A vertical slit 6 extending from the open end (free end) 5 of the support portion 3 toward the base portion 2 side is parallel to the axis.
And a horizontal slit 7 extending in the circumferential direction from the end of the vertical slit 6 on the base side. Therefore, the rectangularly curved rectangular portion 8 separated from the other portions by the slits 6 and 7 is only continuous with the other portion in the region 9 parallel to the axis, and the region 9 is centered. As a result, it is possible to bend and bend around the axis. Hereafter, the rectangular part 8
Is called the deformation section. The free end edge of the deformable portion 8, that is, the surface of the side edge on the side where the horizontal slit 7 is provided among the both side edges of the vertical slit 6 is a tapered surface 10 that becomes thinner toward the tip ( (See FIG. 4).

The fastener 4 is a pipe-shaped member having an inner surface 11 that is in sliding contact with the outer periphery of the support portion 3, and the inner surface 11 has a vertical ridge 12 that can enter the vertical slit 6 and a lateral slit 7. An arcuate lateral ridge 13 that is loosely fitted therein is formed. Further, the vertical ridge 12 may be formed with a tapered surface 14 that facilitates riding on the tapered surface 10 (FIG. 4).
reference). The length of the lateral ridge 13 is short enough to allow the lateral ridge to move a little along the lateral slit 7. Note that reference numerals 15 and 16 in FIG. 1 are alignment marks for aligning the vertical ridges 12 with the vertical slits 6.

A grip mechanism 1 constructed as described above.
Can be assembled by attaching the fastener 4 to the support portion 3 by inserting the vertical ridges 12 into the vertical slits 6 while using the alignment marks 15 and 16 as marks (the imaginary line in FIG. 2). See S). Although the lateral ridge 13 interferes with the end surface of the deformable portion 8 when it is mounted, the deformable portion 8 is bent and deformed inward, so that it can be easily mounted.
Then, once mounted, the lateral protrusion 13 engages with the lateral slit 7 to prevent the fastener 4 from falling off the support portion 3. In this embodiment, the outer diameter of the base 2 is set to the same level as the fastener 4,
Since the step portion 17 is provided between the support portion 3 and the outer periphery thereof, the fastener 4 may be inserted until it comes into contact with the step portion 17.

In order to mount the pipe P of FIG. 1 on the grip structure 1 assembled as described above, first, with the alignment marks 15 and 16 being aligned, the pipe P of FIG.
The pipe P is inserted into the support portion 3 as shown in FIG. In that state, as shown in FIG. 4, since the vertical ridge 12 is fitted in the vertical slit 6, the deformable portion 8 expands like other portions and is not deformed inward. Therefore, the pipe P can be easily inserted. In FIG. 3, only the deformable portion 8 is not hatched for easy understanding. Then, after inserting the pipe P, the fastener 4 is rotated somewhat in the direction of arrow T in FIG. Then, as shown in FIG. 5, the vertical ridge 1
2 rides on the tapered surface 10 and presses the tip side of the deformable portion 8 inward. Therefore, the gap between the pipe P, the support portion 3 and the fastener 4 is eliminated, and the deformed portion 8 is in close contact with the surface of the pipe P over its entire inner surface. Then, a sufficiently large frictional force is generated by the reaction force of the elastic deformation of each component, and the pipe P is locked at the inserted position.

When the fastener 4 is rotated in the tightening direction, the distal end of the deformed portion 8 in which the vertical ridge 12 is curved is pushed toward the root side (region 9 side) of the deformed portion 8. Since is sandwiched between the surface of the pipe P and the inner surface of the fastener 4, buckling does not occur. Further, since the deformed portion 8 pushed toward the root side is compressed and deformed in that direction, its reaction force does not hinder the locking action, and rather the tapered surface 1
0 acts to push 0 between the vertical protrusion 12 and the surface of the pipe P, that is, to ensure the locking action. In the above description, the vertical ridge 6 is supposed to stop on the tapered surface 10, but depending on the size of the gap between the respective members, it may reach the cylindrical surface beyond the tapered surface 10. When the gap is considerably large, the deforming portion 8 has an imaginary line K in FIG.
As shown by, the bending curve is inward, but the bending curve is deeper on the tip side, and the bending amount becomes an inclined surface shape with a smaller amount of bending toward the root. Therefore, the outer peripheral surface of the deformable portion 8 constitutes a so-called gentle inclined surface or tapered surface, and the rotation angle θ of the fastener 4 is
The larger the value, the stronger the lock. In addition, the deformation unit 8
Most of the above may be the tapered surface. If a lubricant such as silicone oil is applied to the surface of the deformable portion 8 before the fastener 4 is attached to the support portion 3, the fastener 4
Since the frictional resistance when rotating is reduced and it is not caught by partial unevenness, it can be gripped more firmly, and even when it is removed later, it can be rotated smoothly.

Next, when releasing the lock, the fastener 4
Is rotated in the direction of arrow R in FIG. Then the vertical ridge 1
2 slides on the tapered surface 10 and falls into the vertical slit 6. Therefore, the tightening force of the pipe P of the deformable portion 8 is lost, and the lock is released. In that state, the pipe P can be freely displaced in the axial direction, and can be easily withdrawn. As described above, the magnitude of the force of the locking action depends on the reaction force of the elastic deformation of the respective parts. Therefore, the thickness and rigidity of the support portion 3 and the fastener 4 can be selected within an appropriate range according to the desired locking force. Good. However, in any case, the deforming portion 8 only deforms so as to bend and wrap around the axial center while maintaining the cylindrical shape, so that even if the lock state is maintained for a long period of time, it is within the creep limit range, and A situation in which the lock cannot be released due to deformation (plastic deformation) can be avoided.

Next, with reference to FIGS. 6 and 7, an embodiment of the connecting device for a pipe or the like and the telescopic double pipe structure of the present invention will be described. The coupling device 20 of FIG. 6 has a cylindrical main body 23 having a first support portion 21 for the large diameter pipe P1 at one end and a second support portion 22 for the small diameter pipe P2 at the other end, and the respective support portions. First and second overlying parts 21, 22
It is an independent device consisting of fasteners 24, 25. As shown in FIG. 7, the main body 23 includes a ring-shaped or pipe-shaped base material 26, and first and second support portions 21 and 22 which are concentrically and integrally provided at both ends thereof. First of substrate 26
An inner hole 27 that is continuous with the inner surface of the first support portion 21 is formed on the support portion 21 side, and a second hole 27 is formed on the second support portion 22 side.
An inner hole 28 that is continuous with the inner surface of the support portion 22 is formed. The inner holes 27, 28 are communicated with each other, and a step portion 29 perpendicular to the axis is formed between the inner holes 27, 28.

The structure and operation of the first support portion 21, the second support portion 22, the first fastener 24, and the second fastener 25 are substantially the same as those of the above-described grip mechanism (1 in FIG. 1).
However, the lateral slits 7a and 7b of the supporting portions 21 and 22 and the lateral ridges 12a and 12b corresponding to the lateral slits 7a and 7b are configured such that their supporting portions are oriented in opposite directions and their rear ends are connected to each other. It has been extended. Therefore, it can be said that the connecting device 20 has the first grip mechanism G1 for the large-diameter pipe and the second grip mechanism G2 for the small-diameter pipe P2 connected to both ends of the base material 26. It should be noted that the connecting device 20 can also be regarded as one in which two grip devices (see FIG. 9) such as pipes, which will be described later, are integrally connected to each other at their rear ends. That is, FIG.
If divided into upper and lower at the position of the step 29, the lower part is the first grip device for the large diameter pipe P1 and the upper part is the small diameter pipe P1.
It is a 2nd grip device for 2.

In the connecting device 20 such as a pipe constructed as described above, two pipes are connected to each other, so that the thin second pipe P2 is slidably inserted into the thick first pipe P1. Used to. That is, in the coupling device 20 of FIGS. 6 and 7, the first fastener 24 is attached to the first support portion 21 of the main body 23, and the first support portion 21 is provided with the first fastener 21.
The pipe P1 is inserted until its end contacts the step 29. Then, the first fastener 24 is rotated by some rotation to lock. Then, the second pipe P2 is penetrated through the second support portion 22, and the second pipe P2 is inserted into the first pipe P1 as it is, and in that state, the second fastener 25 is locked. Since the lateral slits 7a of the first support portion 21 and the lateral slits 7b of the second support portion 22 face in mutually opposite directions, the first fastener 24 may not loosen when the second fastener 25 is rotated. Absent.

By doing so, the two pipes P
1 and P2 can be firmly connected in a nested state (see FIG. 7). With this, the insertion length L of the second pipe P2 with respect to the first pipe P1 can be freely adjusted by loosening the second fastener 25 and unlocking only the second pipe P2. The structure thus obtained is a telescopic double pipe structure. This one has all the effects of the grip mechanism 1 described above, and in particular, the lock operation and the unlock operation by the second fastener 25 are easy, and there is an advantage that the lock can be easily released even after being locked for a long time. is there.

FIG. 8 shows another embodiment of the connecting device such as a pipe according to the present invention. In the connecting device of FIGS. 6 and 7 described above, the grip mechanisms G1 and G2 are provided on both sides of the base material 26, but in the connecting device 30 of this embodiment, two sets of large and small grip mechanisms are connected in series on one side of the base material 31. It is provided in that order. It should be noted that this can also be regarded as one in which a second grip mechanism for a small diameter pipe is connected to the tip side of the grip device in FIG.

The device 30 shown in FIG. 8 comprises a cylindrical main body 32 and a fastener 33 fitted on the outer periphery of the main body 32. The main body 32 includes a ring-shaped or pipe-shaped base material 31,
First support portion 34 for large diameter pipe connected to one end thereof
And a second support portion 3 for a small-diameter pipe connected to the tip thereof
And 5 are integrally formed. And the vertical slit 36
Are common, but as the lateral slits, the first and second lateral slits 37 and 38 for the large-diameter pipe and the third lateral slit 39 for the small-diameter pipe are all the same. It is formed to face. The intermediate second lateral slit 38 is for ensuring the bending of the deforming portion 8a of the first supporting portion 34. Inside the main body 32, a first inner hole 40 for fitting a large diameter pipe
And a second inner hole 41 for a small diameter pipe are formed,
They communicate with each other at the step 42 where the ends of the large diameter pipes abut.

On the other hand, the fastener 33 has a structure in which a first fastener 33a for a large diameter pipe and a second fastener 33b for a small diameter pipe are integrally connected to each other.
Vertical protrusions 12a, 12 corresponding to the deformed portions 8a, 8b of 35
b are arranged in a line. In addition, the number of the lateral ridges 13 may be one. As in the case of the connecting device of FIG. 7, this device is capable of telescopically connecting two pipes nested in each other, and by connecting in such a manner, the telescopic double pipe structure of the present invention can be obtained. You can

FIG. 9 shows an embodiment of the grip device of the present invention. The grip device 44 includes a ring-shaped or pipe-shaped base material 45, a main body 46 composed of a support portion 3 integrally provided concentrically at one end of the base material, and a fastener 4 attached to the support portion 3. Become. The support portion 3 and the fastener 4 constitute the grip mechanism (reference numeral 1 in FIG. 1). This is used, for example, to attach a relatively light-weight component such as a cap holder or a small case to the outer periphery of a pipe P or the like arranged in the vertical direction so that its height can be adjusted. In that case, the hat-hanging hook 47 and the like are provided in a state of protruding laterally from the base material 45. The hook 47 and the like may be separately molded and then fixed later, or may be integrally molded with the main body 46.
A pair of grip devices may be attached to the two pipes arranged in parallel, and the main bodies 46 may be connected to each other by a horizontal rod. In addition, the large diameter pipe P is formed on the inner surface of the base material 46.
The inner hole 48 for 2 may be formed so as to form an expandable double pipe structure similar to the case of FIG. 7. In that case, the main body is fixed to the large diameter pipe P2 by a fixing means such as an adhesive or a screw.

FIG. 10 shows an embodiment of an assembling type hanger hook adopting the expandable double pipe structure of the present invention. This hanger hook 50 includes four sets of expandable double pipe structures 51, 52, 53, 54 and two corner members 55.
And two bases B are combined in a square shape. For connecting the two pipes P1 and P2 in each expandable double pipe structure, for example, the connecting device 20 of FIGS. 6 to 7 is adopted. The grip mechanism 1 (see FIG. 1) of the present invention is used to connect the expandable double pipe structures 51 and 54 extending in the lateral direction to the corner member 55 and the base B. The same gripping mechanism can be adopted for the vertical stretchable double pipe structures 52, 53 and the vertical connecting portions 55a, 55b of the corner member 55 or the base portion B, but do not simply shift the vertical direction. Since it is only necessary to fix it, it is sufficient to strongly fix the end of the pipe.

FIG. 11 shows a large hanger hook 57 in which two hanger hooks 50 of FIG. 10 are arranged front and back and are connected by a pair of left and right bases B and a pair of left and right horizontal rods 56.
The horizontal rods 56 connect the base materials of the two connecting devices (for example, 20 in FIG. 6). When clothes or the like are hung on the hanger hooks 50 and 57, a bending force is applied to the vertically extending double pipe structures 52 and 53 in addition to the axial force. Therefore, the gripping mechanism at the connecting portion between the pipes produces a so-called "shock" together with the force to displace the pipes, and firmly holds the pipes. Therefore, even if a considerable amount of weight is applied downward, the thin pipe does not enter the thick pipe. Further, since those hanger hooks frequently use an expandable double pipe structure in which two pipes are combined in advance, it is easy to handle such as packing and assembling.

In the coupling device 60 such as a pipe shown in FIGS. 12 and 13, two sets of the vertical slits 6 and the horizontal slits 7 formed in each of the supporting portions 21 and 22 of the main body 23 are rotationally symmetrical. And small diameter pipe P2
6 and 7 except that a cylindrically wound elastic sheet 61 of rubber or the like is interposed between the second support portion 22 and the second fastener 25 for use in Have the same configuration. Since this set has two sets of vertical slits 6 and horizontal slits 7, the deforming portion 8 formed by them is also arranged so as to sandwich the pipe P2 from both sides.
Therefore, the deformation amount of each deforming portion 8 is small,
There is an advantage that the centers of the small diameter pipe P2 and the large diameter pipe P1 are easily aligned with each other. Since the horizontal slits 6 are lined up at two locations on the same circumference, the length of each horizontal slit 6 is made shorter than the case of one slit. Further, in this connecting device 60, the small diameter pipe P
The inner diameter of the fastener 25 for 2 is enlarged according to the thickness of the sheet 61. Further, at the end of the fastener 25, the seat 6
It is preferable to provide a stepped portion 62 that covers one end portion of No. 1.

The elastic sheet 61 is made of NB in addition to natural rubber.
Butadiene-based synthetic rubber such as R, other types of synthetic rubber,
Alternatively, it is preferably made of synthetic resin such as urethane resin and having a thickness of about 1 to 2 mm. Further, this sheet may be any sheet as long as it has appropriate flexibility and elasticity, and preferably has a high coefficient of friction with the pipe. By interposing such a sheet 61, it is possible to absorb the accuracy error of the outer diameter and the eccentricity of the pipes P1 and P2 and the error of the molding accuracy of the coupling device itself, so that the pipe P2 can be firmly gripped. Therefore, for example,
Telescopic double pipe structure 5 with 0 hanger hook 50
It is suitable for supporting a high load in the axial direction, such as a grip mechanism that holds the small-diameter pipes P2 of 2, 53. By the way, the actual one did not shift even under a load of about 50 kgf.

FIG. 14 shows a corner member 70 having two sets of grip mechanisms, which can be used for the upper corner member 55 of the hanger hook 50 of FIG. 10, for example. In this embodiment, three sets of vertical slits 6 and horizontal slits 7 are formed in each of the supporting portions 3 and 3, and a free end of the main body 71 is provided with a hook 72 for hooking a bag or the like. . This one also uses fasteners 4 for each support 3
The three deformed portions 8 can be uniformly tightened. Note that the sheet 61 of FIG. 12 can be interposed also in this case.

In each of the above embodiments, one or a few vertical ridges 12 extending in the longitudinal direction are provided on the inner surface of the fastener 4, but the vertical slits 6 are fitted in place of the vertical ridges 12. Proper protrusions may be provided. The number of such protrusions may be one, but it may be two or several protrusions vertically aligned so as to enter the vertical slit 6. Further, as shown by an imaginary line in FIG. 14, the inner surface 73 of the vertical protrusion 12 may be tapered, and the tapered surface may be extended as it is to the inner surface of the fastener 4. In that case, most of the outer surface of the deformed portion 8 becomes thinner toward the vertical slit 6 side, and the taper surface has the same inclination as the above-mentioned taper surface (inner surface 73). It is preferable that they are deeply engaged with each other.

[0036]

The grip mechanism of the present invention utilizes the deformed portion provided in the support portion as means for tightening a pipe or the like,
Since the tip of the deformed portion is pressed by the protrusion of the fastener, the pipe or the like can be firmly gripped, and the grip can be easily released even after long-term use. INDUSTRIAL APPLICABILITY The grip device, the coupling device, the expandable double pipe structure, and the assembled furniture of the present invention have the effect of the grip mechanism, so that the pipe and the like can be firmly and easily fixed, and further, disassembly, height adjustment, etc. Is also easy.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a grip mechanism of the present invention before assembly.

FIG. 2 is a partially cutaway side view of the grip mechanism of FIG.

3 is an assembled state of the grip mechanism of FIG.
FIG. 3 is a sectional view taken along line III-III.

FIG. 4 is an enlarged sectional view of a main part of the grip mechanism of FIG.

5 is an enlarged cross-sectional view of an essential part showing a locked state of the grip mechanism of FIG.

FIG. 6 is a perspective view showing an embodiment of the connecting device of the present invention.

FIG. 7 is a cross-sectional view showing an embodiment of a telescopic double pipe structure according to the present invention.

FIG. 8 is a perspective view showing another embodiment of the coupling device of the present invention.

FIG. 9 is a cross-sectional side view of essential parts showing an embodiment of a grip device of the present invention together with an embodiment of a telescopic double pipe structure using the same.

FIG. 10 is a perspective view showing an embodiment of the assembled pipe furniture of the present invention.

FIG. 11 is a perspective view showing another embodiment of the assembled pipe furniture of the present invention.

FIG. 12 is a perspective view showing still another embodiment of the coupling device of the present invention.

13 is a vertical cross-sectional view of the coupling device of FIG.

FIG. 14 is a perspective view showing still another embodiment of the grip mechanism of the present invention.

FIG. 15 is a perspective view of an example of a conventional grip mechanism before assembly.

FIG. 16 is a sectional view showing an example of a conventional expandable double pipe structure.

[Explanation of Codes] 1 Grip mechanism 3 Support part 4 Fastener 6 Vertical slit 7 Horizontal slit 8 Deformation part 10 Tapered surface 12 Vertical ridge 13 Horizontal ridge P pipe 20 Coupling device 21 First support part 22 Second support part 23 Main body 24 First fastener 25 Second fastener 30 Coupling device 32 Main body 33 Fastener 44 Grip device 45 Main body 50 Hanger hook 57 Hanger hook

Claims (15)

[Claims] 1. An elastic cylindrical support portion having an inner diameter for accommodating a pipe or the like to be attached, the base end of which is fixed to a mating member, and a short portion fitted to the outer periphery of the support portion. A tubular fastener, comprising a vertical slit extending from the free end in the direction parallel to the axis to the vicinity of the base in the supporting portion, and a lateral slit continuously extending in the circumferential direction from the end on the proximal end side of the vertical slit. A pipe having a slit formed therein, and a protrusion for pressing a rectangular deformed portion of the support portion, which is defined by a vertical slit and a horizontal slit, inward in the radial direction on the inner surface of the fastener. Grip mechanism such as. 2. The mechanism according to claim 1, wherein a plurality of sets of the vertical slits and the horizontal slits are provided. 3. The mechanism according to claim 1, wherein the projection on the inner surface of the fastener is a ridge that fits into the vertical slit of the support portion and can ride on the edge of the deformable portion. 4. A taper surface that pushes the deformable portion inward as the fastener is rotated toward the root side of the deformable portion is formed on one or both of the outer surface of the deformable portion and the inner surface of the protrusion. The mechanism according to Item 1, 2 or 3. 5. An arc-shaped protrusion that floats in the lateral slit is provided on the inner surface of the fastener.
Or the mechanism according to 4. 6. The mechanism according to claim 1, wherein a sheet having flexibility and elasticity and a high friction coefficient is interposed between the fastener and the support portion. 7. A ring-shaped or pipe-shaped base material having an inner diameter for accommodating a pipe or the like to be mounted, and a support portion concentrically with the base material and integrally provided at one end of the base material. A grip device such as a pipe comprising the grip mechanism according to claim 1, 2, 3, 4, 5 or 6. 8. A grip device having two sets each having the structure of claim 7, wherein the free ends of the base materials are integrally connected to each other, and a lateral slit in the first grip device and a second slit are provided. The connecting device such as a pipe in which the lateral slits of the grip device are opposite to each other. 9. The small-diameter pipe, wherein the first grip device is configured to hold a pipe having a predetermined inner diameter and outer diameter, and the second grip device is slidably accommodated in the pipe. 9. The connecting device according to claim 8, wherein the connecting holes are configured to hold each other, and the inner holes of the base material communicate with each other via a step. 10. The grip device according to claim 7, and the support part is integrally provided in series at the tip side of the support part of the grip device in series. A grip mechanism, wherein the grip device holds a pipe having a predetermined outer diameter, and the grip mechanism holds a small-diameter pipe slidably accommodated in the pipe. Connecting device such as pipes. 11. The lateral slit of the grip device and the lateral slit of the grip mechanism are oriented in the same direction, and the fastener of the grip device and the fastener of the grip mechanism are integrally connected.
The coupling device as described. 12. A first pipe, a second pipe slidably accommodated in the first pipe, and a grip device for holding the second pipe, such as a pipe according to claim 7. An expandable double pipe structure in which a ring-shaped or pipe-shaped base material of the grip device is concentrically fixed to the open end of the first pipe. 13. A first pipe, a second pipe slidably accommodated in the first pipe, and a first pipe and a second pipe for elastically connecting and holding the first pipe and the second pipe. ,
A connecting device such as a pipe according to 10 or 11,
An expandable double pipe structure in which the connecting device is concentrically fixed to the open end of the first pipe by a first grip device or a grip device. 14. A prefabricated pipe furniture which employs the expandable double pipe structure according to claim 12 or 13 as two columns supported in parallel with each other. 15. Assembled pipe furniture, wherein a grip mechanism such as a pipe according to claim 1, 2, 3, 4, 5 or 6 is adopted for connecting a structural component and a pipe as a structural material. .