JP2002338195A - Height adjuster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a height adjuster that has a wide adjustable range and sufficient strength. SOLUTION: An inner circumference of an open lower end of an upper pipe 1 fixed on a supported object is a first taper surface 4. An open upper end of a lower pipe 2 with a lower end butting against an installation surface is a second taper surface 5. An inner circumference of a first fixing member 6, which is in slidable contact with an inner circumference of the upper pipe, is a third taper surface 8. An outer circumference of a second fixing member 7, which is in slidable contact with an outer circumference of the lower pipe, is a fourth taper surface 9 in contact with the first taper surface 4. The first and second fixing members are at an arbitrary interval set by screw rods 10 and nuts 11. The lower pipe 2 is inserted in the upper pipe 1 via the two fixing members coupled by the screw rods. The taper surfaces 4 and 9, and 5 and 6 of the two pipes 1 and 2 and the two fixing members 6 and 7 create a wedge effect to provide strong axial rigidity and endure large moment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting device serving as an adjustable support leg when various machines and devices are installed on an installation surface.

[0002]

2. Description of the Related Art In general, various machines, devices and the like which are used by being installed at predetermined positions on an installation surface are generally provided with support legs whose height can be adjusted. For example, for conveyors used in transport lines for article processing, etc., it is necessary to adjust the height of the transport surface from the convenience of work, and adjust the support leg device that installs the conveyor on the installation surface Then, it was necessary to adjust the height on the installation surface of the conveyor. As such a supporting leg device, a device in which a leg having a threaded portion formed at an upper end is screwed to a nut fixed to a main body side of a conveyor is known. To adjust the support height, the support leg is turned with respect to the nut whose position is fixed, and the support leg is advanced and retracted in the axial direction.
After appropriately adjusting the length of the support leg protruding from the main body, a lock nut is further screwed into a thread portion of the support leg protruding from the nut to reinforce the fixed state.

[0003]

A conventional support leg device is:
Since the screw formed on the rod-shaped support leg was only screwed into the nut fixed to the main body, there was a problem that the height adjustment range was narrow only to the length of the screw formed on the support leg. Was. In addition, the strength was not sufficient because it was fixed only by the screw portion and the nut.

Accordingly, an object of the present invention is to provide a height adjusting device having a wide adjustment range and sufficient strength.

[0005]

According to a first aspect of the present invention, there is provided a height adjusting apparatus for adjusting a height of a supported object (conveyor 100). Have. First, an upper tube (1) having an upper end fixed to a supported object and having a first tapered surface (4) formed on an inner peripheral surface of an open lower end, and a lower end contacting an installation surface (3). A lower pipe (2) having a second tapered surface (5) formed on an outer peripheral surface of an upper end inserted from an open lower end of the upper pipe. Next, it has a first fixing member (6) and a second fixing member (7). The first fixing member is a member that is inserted into the upper tube, and slidably contacts an inner peripheral surface of the upper tube on an outer peripheral surface, and is inserted into the upper tube on an inner peripheral surface thereof. A third tapered surface (8) with which the first tapered surface of the lower pipe contacts
Are formed. The second fixing member is a member into which the lower pipe is inserted, and slidably contacts an outer peripheral surface of the lower pipe on an inner peripheral surface, and has a second tapered surface of the upper pipe on an outer peripheral surface thereof. And a fourth tapered surface (9) in contact with.
And it has fixing means (screw rod 10, nut 11) for connecting the first fixing member and the second fixing member at an arbitrary interval.

According to a second aspect of the present invention, in the height adjusting apparatus, the fixing means includes:
A screw rod (10) and a nut (11) for connecting the first fixing member (6) and the second fixing member (7) at an arbitrary interval.
It is characterized by being.

According to a third aspect of the present invention, in the height adjusting apparatus, the first fixing member (6) and the second fixing member (7) are annular. Features.

According to a fourth aspect of the present invention, there is provided a height adjusting device according to the first aspect, wherein the first fixing member (6) and the second fixing member (7) are annular members. It is characterized in that it is divided into a plurality in the circumferential direction.

[0009]

FIG. 1 shows an example of an embodiment of the present invention.
This will be described with reference to FIGS. As illustrated in FIG. 5, the height adjusting device of this example is used to support and install a transport device (conveyor 100), which is a type of equipment as a supported object, on an installation surface so that the height can be adjusted. Can be An upper pipe 1 is fixed to a main body 101 of a conveyor 100 which is a supported object,
A lower pipe 2 is attached to the lower end of the upper pipe 1 so as to be adjustable. The lower end of the lower pipe 2 is in contact with the installation surface 3.

The upper pipe 1 has an upper end fixed to the main body 101 of the conveyor 100 as shown in FIG. 5, and a first tapered surface 4 formed on the inner peripheral surface of the open lower end as shown in FIG. I have.

As shown in FIG. 5, the lower tube 2 has a lower end portion abutting on the installation surface 3 and a second outer surface on the upper end portion as shown in FIG.
A tapered surface 5 is formed. The upper end of the lower tube 2 is inserted from the open lower end of the upper tube 1.

First and second fixing members 6 and 7 are used to adjust the support height of the upper tube 1 and the lower tube 2. The first fixing member 6 is a member inserted into the upper tube 1. As shown in FIGS. 1 to 3, the first fixing member 6 of the present example is an annular member as a whole, and has a structure in which this is divided into two in the circumferential direction. These first fixing members 6 slidably contact the inner peripheral surface of the upper tube 1 on the outer peripheral surface. The inner peripheral surface of the first fixing member 6 is a tapered surface, which is referred to as a third tapered surface 8. When the first fixing member 6 is inserted into the upper tube 1 and the lower tube 2 is further inserted, the second tapered surface 5 of the inserted lower tube 2 contacts the third tapered surface 8 of the first fixing member 6. Touch

The second fixing member 7 is provided at the open lower end of the upper tube 1 and is a member into which the lower tube 2 is inserted.
As shown in FIGS. 1 to 3, the second fixing member 7 of the present example is an annular member as a whole, and has a structure in which this is divided into two in the circumferential direction. These second fixing members 7
Is slidably in contact with the outer peripheral surface of the lower tube 2 on the inner peripheral surface, and the outer peripheral surface thereof is a fourth tapered surface 9 that is in contact with the first tapered surface 4 of the upper tube 1.

As shown in FIGS. 1-4, the first fixing member 6
And the second fixing member 7 are connected by fixing means. The fixing means of this example has a screw rod 10 as a connecting means for connecting the first fixing member 6 and the second fixing member 7 at an arbitrary interval, and a nut 11 as a fixing element. The upper end of the screw rod 10
The first fixing member 6 is screwed and fixed. Screw rod 10
Is inserted through a through hole 12 having an inner diameter larger than the outer diameter of the threaded rod 10 formed in the second fixing member 7, and is connected to the second fixing member 7 with a nut 11. Therefore, if the position of the nut 11 is appropriately adjusted, the maximum distance between the first and second fixing members 6 and 7 can be arbitrarily adjusted.

The installation height of the conveyor 100 as a supported object is determined by the insertion length of the lower pipe 2 with respect to the upper pipe 1.
This is adjusted as follows. First, as shown in FIG. 1, the first fixing member 6 and the second fixing member 7 are connected by the screw rod 10 and the nut 11, and the two members 6, 7 at the position where the second fixing member 7 contacts the nut 11 are connected. Since the interval is substantially equal to the insertion length of the lower tube 2 with respect to the upper tube 1, the interval between the two members 6, 7 is set so that the required height is obtained by the two tubes 1, 2.

As shown in FIG. 2, both members 6 and 7 joined by a screw rod 10 or the like are inserted into the upper tube 1. As shown in FIG. 3, the lower pipe 2 is inserted from the second fixing member 7 and the lower end of the lower pipe 2.

If the conveyor 100 is set on the setting surface 3 in this state, the weight of the conveyor 100 is added to the second fixing member 7 from the upper pipe 1 via the tapered surfaces 4 and 9 which are in contact with each other. The downward force applied to the second fixing member 7 is
, And from the first fixing member 6 to the lower tube 2 via the tapered surfaces 5 and 8 which are in contact with each other.

When the lower tube 2 is inserted into the upper tube 1 as described above, the lower end of the lower tube 2 and the upper tube 1 are connected to each other by the first and second fixing members 6 and 7 connected by the screw rod 10. Are fixed to each other, so that the two pipes 1 and 2 of this height adjusting device are different from the conventional structure in which a threaded leg is screwed to a nut fixed to the main body. Is mechanically strong, is resistant to bending loads, and does not easily buckle. That is, the tapered surfaces 4, 9 of the two tubes 1, 2 and the two fixing members 6, 7
And the wedge effect of 5, 6 provides strong axial rigidity and withstands large moments.

When it is desired to change the installation height of the conveyor 100 in accordance with a change in the operating conditions of the conveyor 100, the lower pipe 2
Is pulled out so that no force is applied to the fixing members 6 and 7, the position of the nut 11 with respect to the screw rod 10 is arbitrarily reset, and the fixing members 6 and 7 and the lower tube 2 are inserted into the upper tube 1 again. And use it. Since the adjustable length range corresponds to the length of the screw rod 10, a wider range can be adjusted than before by using a screw rod 10 of an appropriate length as needed. Further, the pipe itself only needs to be tapered at the opening end (chamfering), and only a fixing means is added as a new part, and high rigidity and convenience can be realized with a simple configuration.

[0020]

According to the present invention, the upper pipe and the lower pipe each having a tapered surface formed at the end are connected to each other by a fixing means capable of forming a tapered surface in contact with each tapered surface and adjusting the interval. The length adjustment range is large due to the combination through the first and second fixing members, and strong rigidity is obtained in the axial direction due to the wedge effect of the tapering surfaces of both fixing members and both pipes, and the bearings withstand large moments. Is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disassembled state in a first example of an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in the middle of assembly in the first example of the embodiment of the present invention.

FIG. 3 is a perspective view showing an assembled state in the first example of the embodiment of the present invention.

FIG. 4 is a sectional view showing an assembled state in the first example of the embodiment of the present invention.

FIG. 5 is a front view showing the entirety including the conveyor in the first example of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper pipe 2 ... Lower pipe 3 ... Installation surface 4 ... 1st taper surface 5 ... 2nd taper surface 6 ... 1st fixing member 7 ... 2nd fixing member 8 ... 3rd taper surface 9 ... 4th taper surface 10 ... Screw rod as fixing means 11 ... Nut as fixing means

Claims (4)

[Claims] 1. A height adjusting device for adjusting the height of a supported object, wherein an upper end portion is fixed to the supported object, and a first tapered (4) surface is formed on an inner peripheral surface of an open lower end portion. And a lower pipe (2) having a second tapered surface (5) formed on an outer peripheral surface of an upper end inserted from an open lower end of the upper pipe. 2) and a member inserted into the upper tube, wherein the member is slidably contacted on an outer peripheral surface with respect to an inner peripheral surface of the upper tube, and the inner peripheral surface has the lower member inserted into the upper tube. A first fixing member (6) formed with a third tapered surface (8) with which the first tapered surface of the tube is in contact, and a member into which the lower tube is inserted, wherein the first fixing member (6) is inward with respect to the outer peripheral surface of the lower tube A second fixing portion which is slidably in contact with the peripheral surface and has a fourth tapered surface (9) formed on the outer peripheral surface thereof in contact with the second tapered surface of the upper tube; (7) and a height adjustment device having a fixing means for coupling (10, 11) in the first fixing member and the second fixing member arbitrary intervals. 2. The fixing means according to claim 1, wherein said fixing means comprises a screw rod (10) for connecting said first fixing member and said second fixing member at an arbitrary interval.
2. The height adjusting device according to claim 1, wherein the height adjusting device comprises a nut and a nut. 3. The height adjusting device according to claim 1, wherein the first fixing member and the second fixing member are annular. 4. The height adjusting device according to claim 1, wherein the first fixing member and the second fixing member have a structure in which an annular member is divided into a plurality of members in a circumferential direction.