JPH0442460Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a length adjustment device for connecting two members so that the length can be adjusted in one direction. This is used in a length adjustment device for adjusting the length of a support arm consisting of an arm and an adjustment arm.

BACKGROUND ART Conventionally, in order to connect two members so that their length can be adjusted in one direction, for example, as shown in the linear mounting member A of an adjustment hinge shown in Japanese Utility Model Application Publication No. 51-71481, two members are connected so that the length can be adjusted in one direction. One member of the movable piece L is provided with a long groove D extending in one direction, and the other member, the mounting piece C, is provided with a screw hole. The length was adjusted by moving the fixing screw, and then the fixing screw was passed through the long groove D, screwed into the screw hole E, and tightened and fixed, thereby allowing the length of the linear mounting member A to be adjusted freely. . (See Fig. 6) Problems to be Solved by the Invention However, in the case of the adjustment device as described above, if an external force greater than the tightening force is applied to the adjusting screw after connection, the screw will loosen and cause damage to both members. There was a drawback that the position of the screws could shift, and even during long-term use, if the screws became loose, both components could easily move. In particular, when such an adjustment device is used for a support arm for supporting the shoji of a vertical sliding window or a casement window, the above-mentioned drawbacks are likely to occur because the load of the shoji is constantly acting on the support arm. Ta.

Means for Solving the Problems The present invention was devised in order to eliminate the above-mentioned drawbacks of the conventional technology, and it connects a fixed arm and an adjustable arm through an elongated hole with a bolt so that the length can be adjusted freely. In the connecting device, the distance between each selected two through holes is the distance from the screw hole or through hole for attaching the connecting plate of the adjustment arm to the long hole, and the length that can be adjusted to this distance. A connecting plate is provided with a plurality of through holes having the same diameter as the shaft of the bolt so that the holes are located between the length of the elongated holes plus the length of the elongated hole. Insert the bolt into the hole,
One side is connected to the fixed arm through the long hole of the adjustment arm.
The other arm is fixed to the adjustment arm, and both arms are connected and fixed via connecting plates, so even if a large external force is applied to both arms in the adjustment direction, neither arm will move at all. It is durable enough to withstand long-term use.

Embodiment Examples of the present invention will be described below.
The figure is an exploded perspective view of the first embodiment of the length adjustment device of the present invention, in which the support arm 1 is the two members to be adjusted, the fixed arm 3 and the adjustment arm 4, and the movement of the adjustment arm 4 is restricted. The fixing arm 3 is rotatably supported at one end by a support shaft A installed upright on a pedestal 2 provided with a bolt insertion hole 21 for fixing the lower frame, and the other end is provided with a fastening bolt. Screw holes 31, 32, 33 for attaching bolts 7, 8 for
are being drilled sequentially. The adjustment arm has elongated holes 41, 42, 43 at positions corresponding to the screw holes 31, 32, 33 formed in the fixed arm 3, and a screw hole 44 for attaching the connecting plate at the tip thereof. ing. A plurality of through holes 51 to 57 having the same diameter as the shaft portion of the bolt 8 are bored in the connecting plate 5, and the distance between every other two through holes is different. They are arranged so that the dimensions are as follows. For example, as shown in FIG. 4, if the distances between the through holes provided in the connecting plate 5 are a, b, and c (however, a<b<c),
The distance between every other two arbitrary holes is a+a,
There are five different distances: a+b, a+c, b+b, b+c, and the length e of the elongated hole is an adjustable dimension, and the minimum distance a+a and the maximum distance b
If it is the same as the difference from +c, every other 2
Select the through holes and insert the bolts 8, 8 into them, attach one bolt 8 to the screw hole 44 for attaching the connecting plate of the adjustment arm 4, and insert the other bolt 8 to the length of the adjustment arm 4. Threaded hole 33 of fixed arm 3 through hole 43
By attaching it to the holder, the length can be adjusted in 5 steps. To explain with more specific numerical values, each distance between the through holes 51 to 57 of the connecting plate 5 is, for example, a = 9 mm, b = 10 mm, c = 12 mm.
Then, a + a = 18 mm, a + b = 19 mm b + b = 20 mm, a + c = 21 mm b + c = 22 mm e = (b + c) - (a + a) = 22 mm - 18 mm = 4 mm, and every 1 mm in the connection between fixed arm 3 and adjustable arm 4. This means that the length can be adjusted up to 4 mm in five steps.

Therefore, by changing the spacing and number of through holes in the connecting plate 5 and the length of the elongated holes in the adjusting arm 4, the adjustable length, the number of adjustment steps, and the length of one adjustment can be used. This can be selected and set in various ways depending on the location or object.

By the way, to adjust the length of support arm 1,
First, remove the connecting plate 5, move the adjustment arm 4 left and right with the bolt 7 loosened, adjust the length from the fixed arm 3 to the adjustment arm 4 to the specified dimension, and then temporarily tighten the bolts 7, 7. Next, select the two through holes 52 and 54 of the connecting plate 5 that match the distance between the screw hole 44 for attaching the connecting plate of the adjustment arm 4 and the screw hole 33 of the fixed arm 3, and Bolts 8, 8 are inserted through 54, and the connecting plate 5 is fixed to the adjusting arm 4 on one side, and connected and fixed to the fixed arm 3 through the elongated hole 43 of the adjusting arm 4 on the other side. Then, the temporarily tightened bolts 7, 7 are fully tightened to fix each member, and the assembly is completed as shown in FIG.

Moreover, what is shown in FIG. 3 is a second embodiment of the present invention, in which a screw hole 44 for attaching the connecting plate of the adjustment arm 4 is shown.
is replaced with the through hole 46, and the tip of the bolt 8 inserted through the through hole 46 is provided with a hole 5 that comes into contact with the end surface of the fixed arm 3.
A rectangular back plate 6 is attached to restrict movement of the adjustment arm 4. This pentagonal back plate 6 has different distances from the screw hole 61 in the center to each of the five sides, and the distance from the screw hole 33 of the fixed arm 3 to the screw hole 61 in the back plate 6. One side of the back plate 6 is selected and brought into contact with the end surface of the fixed arm 3 so that α is equal to the distance β between the two through holes 52 to 54 of the connecting plate 5, and the connecting plate 5 and the adjusting arm A bolt 8 is attached through each through hole. Therefore, the length can be adjusted by appropriately selecting the two through holes in the connecting plate 5 and one side of the back plate 6. To explain this in detail based on the exploded explanatory diagram of FIG. 4, the distances from the screw hole 61 in the center of the back plate 6 to each side are f, g, h,
i, j (however, f<g<h<i<j), and if the distance from the screw hole 33 of the fixed arm 3 to the end surface is d, then the screw hole 33 of the fixed arm 3
The distance α of the screw hole 61 of the back plate 6 is d+f, respectively.
There are five lengths: d+g, d+h, d+i, and d+j, and by selecting two holes in the connecting plate 5 at a distance β corresponding to this distance and fixing them with bolts 8, the length can be adjusted to five levels. It will be possible. Therefore, if the back plate 6 is formed into a polygon having more shapes than pentagons, the number of adjustment steps can be increased. At this time, it is necessary to set the number of through holes in the connecting plate 5 and the distance between the through holes accordingly.

Next, referring to an embodiment of the length adjusting device of the present invention, FIG. 5 shows an example in which the length adjusting device of the present invention is used for a shoji support arm of a vertical sliding window.
Two shoji support arms are installed at the top and bottom,
A spindle A with one end attached to the upper frame D and lower frame E of the window,
A and the other end are rotatably attached to the central part B of the shoji C, respectively, and the window is opened by sliding the shoji C forward while rotating with the shoji C placed on the support arm 1. The installation of the shoji C can be adjusted by adjusting the length of the support arms 1 provided above and below.In this case, the connection between the fixed arm and the adjustment arm of the support arm 1 is adjusted. The installation of the shoji C is adjusted by changing the distance between the two supporting points A and B.

Although the length adjusting device of the present invention is applied to a shoji support arm, it can be applied to any type of device as long as it is two members connected to each other so that the length can be adjusted.

Effects of the invention The present invention is a connecting device in which a fixed arm and an adjustable arm are connected via a long hole with a bolt so that the length can be freely adjusted. A connecting plate with multiple through holes of the same diameter as the bolt shaft is used between the lengths of the bolts, and the bolts are inserted into the fixing arm and the adjusting arm through the two selected through holes in the connecting plate. Because they are connected and fixed, even if a large external force is applied to the two connected and fixed arms, there is no risk of them moving relative to each other, and a strong connection is achieved. Also, the connecting plate that is connected and fixed to the fixed arm and the adjustment arm The length between the two members can be adjusted simply by removing the bolts and changing the bolt insertion position by changing the two selected through holes, so the adjustment operation is easy.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the first embodiment of the present invention, FIG. 2 is a perspective view of the respective members connected and fixed, and FIG. 3 is an exploded perspective view showing the second embodiment of the invention. Fig. 4 is an exploded explanatory view of each member, Fig. 5 is a front view showing the length adjustment device of the present invention used in a shoji support arm of a vertical sliding window, and Fig. 6 is a conventional length adjustment device. FIG. 3...Fixed arm, 4...Adjustable arm, 43...
...Long hole, 5...Connecting plate, 51-57...Through hole, 6
...Back plate, 7, 8...bolts.

Claims (1)

[Scope of utility model registration request] The fixed arm 3 has screw holes 31, 32, 33, and the adjustment arm 4 has screw holes 31, 32, 33 of the fixed arm 3.
In a connecting device in which elongated holes 41, 42, and 43 are provided at positions corresponding to the lengths of the fixed arm 3 and the adjusting arm 4, the length of the fixed arm 3 and the adjusting arm 4 can be freely adjusted using bolts 7, 8, respectively. A screw hole 44 or a through hole 46 for attaching the connecting plate is bored alongside the elongated hole 43, and a plurality of through holes 51 having the same diameter as the shaft of the bolt 8 are formed.
~57, the distance between the two selected through holes is the distance from the screw hole 44 or through hole 46 for attaching the connecting plate of the adjustment arm 4 to the long hole 43, and the length that can be adjusted to this distance. A connecting plate 5 is provided, which is bored between the lengths of the elongated holes 43 and A length adjusting device between two members, characterized in that one is fixed to the fixed arm 3 through the elongated hole 43 of the adjusting arm 4, and the other is fixed to the adjusting arm 4.