JPH0622466U - Adjustable length support - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] It is possible to reliably prevent the first and second screwed portions from being exposed to the outside, and concrete can be applied to the first and second screwed portions during work. There is no fear that the adherence will adhere, and there is no fear that the threads of the first and second screwing portions will be damaged, so that the service life of the support device can be extended. A support fixture (2) having an upper member (4) and a lower member (6) and fixing the upper member (4) to a predetermined length and then rotating the rotation adjusting unit (8) to adjust the length, A bearing portion 10 that rotatably supports the rotation adjusting portion 8 and fixes the upper member 4 to a predetermined length is provided between the upper members 4, and a first screwing portion is provided on the inner peripheral surface of the rotation adjusting portion 8. A second screwing portion which is screwed into the first screwing portion to adjust the height position of the rotation adjusting portion 8 and which is covered by the rotation adjusting portion 8 at the time of use is provided on the outer peripheral portion of the upper end of the lower member 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support device having an adjustable length, and in particular, it comprises an upper member and a lower member into which the upper member is loosely inserted. After fixing the upper member to a predetermined length, the rotation adjusting unit is rotated to adjust the length. And a support device with adjustable length.

[0002]

[Prior art]

 In general, when forming a structure such as a reinforced concrete building, a supporting device whose length is adjustable is used to support what is called a supporting work for supporting the formwork of the ceiling part.

[0003]

[Problems to be solved by the device]

 By the way, the conventional length-adjustable supporting devices include an external screw type and an internal screw type.

As shown in FIG. 14, the external thread type has an upper member 104, a lower member 106 in which the upper member 104 is loosely fitted and a screwing portion 112 is formed in an outer peripheral portion, and a screw of the lower member 106. And a rotation adjusting portion 108 that engages with the joining portion 112 and moves in the vertical direction while rotating the outer peripheral portion of the lower member 106, and forms a slit 160 of a predetermined length from the upper end of the lower member 106, The fixing pin 138 is penetrated through the slit 160 to fix the upper member 104 to a predetermined length, and the fixing pin 138 is moved up and down by the rotation adjusting unit 108 to adjust the total length of the supporting device 102.

Further, as shown in FIG. 15, the inner screw type one has an upper member 204 and a first lower member 206-in which the upper member 204 is loosely fitted and a threaded portion 212 is formed in an outer peripheral portion. 1, a second lower member 206-2 that loosely fits the first lower member 206-1, and a screwing portion 212 of the first lower member 206-1 that engages with the upper end of the second lower member 206-2 to rotate. And a rotation adjusting portion 208 for moving the first lower member 206-1 in the vertical direction by moving the first lower member 206-1. The fixing pin 238 is passed through the upper end of the first lower member 206-1 to set the upper member 204 in a predetermined manner. The length is fixed, and the first lower member 206-1 is moved up and down by the rotation adjusting unit 208 to adjust the total length of the support fixture 202.

As a result, the screwing portion of the outer screw type lower member and the screwing portion of the inner screw type first lower member are exposed at the surface portion, and concrete adhesion and screw threads are damaged during work. There is a risk that the support device may be used, the useful life of the supporting device is short, which is disadvantageous in practice, and the cost is relatively high, which is economically disadvantageous.

[0007]

[Means for Solving the Problems]

 Therefore, in order to eliminate the above-mentioned inconvenience, this invention has at least an upper member and a lower member into which the upper member is loosely inserted, and after fixing the upper member to a predetermined length, the rotation adjusting portion is rotated. In the support device for adjusting the length of the rotation adjusting unit, a bearing unit for rotatably supporting the rotation adjusting unit and fixing the upper member to a predetermined length is provided between the upper portion of the rotation adjusting unit and the upper member. A first screwing portion is provided on the inner peripheral surface, and the upper end outer peripheral portion of the lower member is screwed onto the first screwing portion to adjust the height position of the rotation adjusting portion and is covered by the rotation adjusting portion during use. The feature is that a second screwing portion is provided.

[0008]

[Action]

 By devising as described above, when the support device is used, the first screwing portion formed on the inner peripheral surface of the rotation adjusting portion is engaged with the second screwing portion formed on the outer periphery of the upper end of the lower member. At the same time, the upper member is fixed to the rotation adjustment unit via the bearing unit, and the support device is assembled. Then, the length of the upper member is set to a predetermined length according to the use location of the support device, and the rotation adjusting portion is rotated to rotate the second screw portion of the lower member and the first screw portion of the rotation adjusting portion. Adjust the length of the support device by moving the rotation adjustment part upward by shifting the screwing position with. At this time, the first and second screwed parts are not exposed to the outside, and there is no fear that concrete will adhere to the first and second screwed parts during the work, and the first and second screwed parts It is unlikely that the threads of the joint will be damaged.

[0009]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 11 show an embodiment of the present invention. In FIGS. 1 to 5, reference numeral 2 is a support device whose length is adjustable.

The support device 2 includes an upper member 4 of a metal pipe and a lower member 6 of the metal pipe having an inner diameter larger than the outer diameter of the upper member 4, that is, the upper member 4 being loosely inserted. After the upper member 4 is fixed to a predetermined length, the rotation adjusting unit 8 is rotated to adjust the length.

A bearing portion 10 for rotatably supporting the rotation adjusting portion 8 and fixing the upper member 4 to a predetermined length is provided between the upper portion of the rotation adjusting portion 8 and the upper member 4, and the rotation adjusting portion 8 is provided. A first screwing portion 12 is provided on an inner peripheral surface of the lower member 6, and the first screwing portion 12 is screwed on an upper end outer peripheral portion of the lower member 6 so as to adjust the height position of the rotation adjusting portion 8 and at the time of use. The second screwing portion 14 covered by the rotation adjusting portion 8 is provided.

More specifically, as shown in FIG. 2, the upper member 4 includes an upper cylindrical pipe portion 16 and a plurality of upper members formed at predetermined intervals in the radial direction of the upper cylindrical pipe portion 16. The through hole portion 18 and the upper support plate portion 20 having a square shape, for example, have a large supporting area at the upper end of the upper tubular pipe portion 16.

As shown in FIG. 3, the lower member 6 includes a lower tubular pipe portion 22, a second screwing portion 14 formed at an outer periphery of an upper end of the lower tubular pipe portion 22, and a lower portion. In order to have a large support area at the lower end of the tubular pipe portion 22, it is composed of, for example, a square lower support plate portion 24.

Further, as shown in FIGS. 4 and 6, the rotation adjusting portion 8 includes a tubular pipe portion 26 and a first screw formed on the inner peripheral surface 26 b of the tubular pipe portion 26 from the lower end to the vicinity of the upper end. The joint portion 12 and first and second protrusions 28 and 30 for adjusting the length, which are formed on the outer peripheral surface 26a of the tubular pipe portion 26, are formed.

Then, as shown in FIGS. 4 and 6 and 7, the rotation adjusting part 8 is rotated between the upper part of the rotation adjusting part 8 and the upper member 4, that is, the upper part and the inner peripheral surface of the rotation adjusting part 8. A bearing portion 10 is provided which supports the upper member 4 at a predetermined length while supporting it freely. The bearing portion 10 is loosely inserted into the upper cylindrical pipe portion 16 of the upper member 4 and fixed at a predetermined height position. And a rotation supporting portion for rotatably supporting the rotation adjusting portion 8 on the inner peripheral surface of the rotation adjusting portion 8 at the upper portion of the rotation adjusting portion 8. And 36. The rotation support portion 36 includes an engaging small diameter portion 34b formed on the outer periphery of the lower portion of the rotating tubular pipe portion 34, and an upper portion of the tubular pipe portion 26 to engage with the outer periphery of the engaging small diameter portion 34b. And an upper and lower support members 36-1 and 36-2 that rotatably support the upper and lower portions of the engaging portion 26X.

Further, a fixing pin 38 is provided which penetrates the fixing hole portion 32 of the rotating cylindrical pipe portion 34 and the upper through hole portion 18 of the upper cylindrical pipe portion 16, and one end 38 a of the fixing pin 38 is provided. The wire 40 is formed to have a small diameter and a large diameter, and one end of a wire 40 is fixed to the one end 38a to prevent the fixing pin 38 from being lost.

Reference numeral A is a base portion when the support device 2 is used, and B is a ceiling portion.

Next, the operation will be described.

When the support device 2 is used, as shown in FIGS. 1 and 8, the rotation adjusting portion 8 is attached to the second screwing portion 14 formed on the outer periphery of the upper end of the lower tubular pipe portion 22 of the lower member 6. The first screwing portion 12 formed on the inner peripheral surface 26b of the tubular pipe portion 26 is engaged with the fixing hole portion 32 of the rotating tubular pipe portion 34 and the upper portion of the upper tubular pipe portion 16. The support device 2 is assembled by penetrating the through hole 18 with the fixing pin 38.

First, as shown in FIG. 9 or FIG. 10, the length of the upper tubular pipe portion 16 of the upper member 4 is set to a predetermined length by the fixing pin 38 according to the use location of the support device 2. .

Then, the first and second protrusions 28 and 30 of the rotation adjusting portion 8 are rotated with bare hands, or by fitting a metal pipe or the like, and rotating the lower tubular shape as shown in FIG. The screwing position of the second screwing portion 14 formed on the outer periphery of the upper end of the pipe portion 22 and the first screwing portion 12 formed on the inner peripheral surface 26b of the tubular pipe portion 26 of the rotation adjusting portion 8 is shifted. Then, the rotation adjusting unit 8 is moved upward to adjust the length of the supporting device 2.

At this time, the second screwing portion 14 formed on the outer peripheral portion of the upper end of the lower tubular pipe portion 22 and the first screw formed on the inner peripheral surface 26 b of the tubular pipe portion 26 of the rotation adjusting portion 8. The joint portion 12 is not exposed to the outside as is clear from the drawing.

Then, as shown in FIG. 11, a plurality of the support fixtures 2 can be used and the ceiling part B can be supported by the support fixtures 2 standing on the base A. Further, the upper tubular pipe portion 16 of the upper member 4 of the support fixture 2, the lower tubular pipe portion 22 of the lower member 6, the tubular pipe portion 26 of the rotation adjusting portion 8, the rotating tubular pipe portion 34 of the bearing portion 10, etc. By changing the length of each of the pipe portions, the supporting device 2 can be made various lengths.

As a result, it is possible to reliably prevent the first and second screw-engaged portions 12 and 14 from being exposed to the outside, and the concrete is not attached to the first and second screw-engaged portions 12 and 14 during work. There is no fear that they will adhere, and there is no fear that the threads of the first and second screwing portions 12, 14 will be damaged, and the useful life of the support device 2 can be extended, which is practically advantageous. At the same time, the cost can be relatively reduced, which is economically advantageous.

Further, since the structure of the supporting device 2 does not become complicated compared with the conventional one, it is easy to manufacture and the cost can be kept low.

The present invention is not limited to the above-mentioned embodiment, and various application modifications are possible.

For example, in the embodiment of the present invention, the bearing portion 10 is exposed to the outside. However, as shown in FIG. 12, a rubber cover portion 50 is provided on the outer periphery of the bearing portion 10, and The cover portion 50 can cover the bearing portion 10 to prevent concrete from adhering and dust from entering. Moreover, if a cover (not shown) is provided between the lower tubular pipe portion and the tubular pipe portion as well, it is possible to further prevent concrete from adhering and dust from entering.

Further, in the embodiment of the present invention, the bearing portion 10 is constituted by the groove portion formed in the rotating tubular pipe portion 34 and the groove portion formed in the tubular pipe portion 26 of the rotation adjusting portion 8. However, as shown in FIG. 13, it is possible to form the bearing portion 60 with a tapered roller bearing, for example.

Further, the embodiment of the present invention may be provided with a lubrication port for the first and second screwing portions and a retaining portion for the first and second screwing portions.

[0031]

[Effect of device]

 According to the present invention as described in detail above, according to the present invention, in a supporting device having an upper member and a lower member, and fixing the upper member to a predetermined length, the rotation adjusting unit is rotated to adjust the length. A bearing portion is provided between the upper portion of the adjusting portion and the upper member so as to rotatably support the rotation adjusting portion and fixes the upper member to a predetermined length, and a first screwing portion is provided on the inner peripheral surface of the rotation adjusting portion. Since the second screwing portion, which is screwed to the first screwing portion to adjust the height position of the rotation adjusting portion and is covered by the rotation adjusting portion at the time of use, is provided at the upper end outer peripheral portion of the lower member. It is possible to reliably prevent the second screwing portion from being exposed to the outside, and there is no fear that concrete will adhere to the first and second screwing portions during the work. 2 The screw thread of the screwed part is not likely to be damaged, and the service life of the support device is extended. Obtained, which is advantageous in practical use. Further, since the structure of the supporting device does not become more complicated than the conventional one, it is easy to manufacture and the cost can be kept low, which is economically advantageous.

[Brief description of drawings]

FIG. 1 is a perspective view of a supporting device showing an embodiment of the present invention.

FIG. 2 is a front view of an upper member of a support device.

FIG. 3 is a front view of a lower member of the support device.

FIG. 4 is a front view of a rotation adjusting portion and a bearing portion of the support device.

FIG. 5 is a schematic view of a fixing pin.

FIG. 6 is a schematic enlarged sectional front view of a rotation adjusting portion and a bearing portion of the support device.

FIG. 7 is an enlarged cross-sectional view of a main part of a bearing portion.

FIG. 8 is a front view of the support device in an assembled state.

FIG. 9 is a front view showing a state in which an upper member of the support device is extended.

FIG. 10 is a front view of a state in which the length of the support device is adjusted by rotating the rotation adjustment unit of the support device and moving the rotation adjustment unit upward.

FIG. 11 is a schematic explanatory view when using a support device.

FIG. 12 is an enlarged sectional view of an essential part of a bearing portion showing another embodiment of the present invention.

FIG. 13 is an enlarged cross-sectional view of a main part of a tapered roller bearing according to another embodiment of the present invention.

FIG. 14 is a perspective view of a supporting device showing one prior art of the present invention.

FIG. 15 is a perspective view of a supporting device showing another conventional technique of the present invention.

[Explanation of symbols]

 2 Supporting device 4 Upper member 6 Lower member 8 Rotation adjusting part 10 Bearing part 12 First screwing part 14 Second screwing part 16 Upper cylindrical pipe part 18 Upper through hole part 20 Upper supporting plate part 22 Lower cylindrical pipe part 24 Lower support plate part 26 Cylindrical pipe part 28 1st protrusion part 30 2nd protrusion part 32 Fixing hole part 34 Rotating cylindrical pipe part 36 Rotation support part 38 Fixing pin 40 Wire A Foundation part B Ceiling part

Claims (1)

[Scope of utility model registration request] 1. A support device which has at least an upper member and a lower member into which the upper member is loosely inserted, and which fixes the upper member to a predetermined length and then rotates a rotation adjusting unit to adjust the length, A bearing portion that rotatably supports the rotation adjusting portion and fixes the upper member to a predetermined length is provided between the upper portion of the rotation adjusting portion and the upper member, and the first screwing portion is provided on the inner peripheral surface of the rotation adjusting portion. And a first outer peripheral portion of the lower member.
A length-adjustable supporting device characterized in that a second screwing portion is provided which is screwed into the screwing portion to adjust a height position of the rotation adjusting portion and which is covered by the rotation adjusting portion during use.