JPS63181707A - Fixing angle control joint and mechanism thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fixed angle adjustment joint mechanism and a fixed angle adjustment joint for a chair with a backrest, a swingable lighting device, etc.

(Prior art and its drawbacks) As an example of the prior art, the joints of a backrest chair are used as an example.
The joints f&if4 used to adjust the angle of the seat and backboard are as shown in Figure 1, and the following "operations" are possible.
There was something to adjust the angle. Immediately---～---One---
- First, when fixing the back plate by raising it from the rear to the front, the angle can be adjusted by simply raising the back plate forward, but when fixing it by tilting it from the front to the rear, it is extremely inconvenient as described below. . In other words, you have to bend the back plate forward to remove the stopper, then fold it backward to engage the stopper with the gear again, and then raise it to the desired angle to adjust the angle. ,
The operation for adjusting the fixed angle of the backboard is complicated and requires large movements, which has the disadvantage that the angle cannot be adjusted while sitting or when there is an obstacle behind the backboard.

(Problems to be Solved by the Invention) The purpose of this study was to improve the angle of a fixed angle adjustable joint so that it can be easily changed with a small movement.

Figure 2 shows a motion analysis of the angle adjustment function of a fixed angle adjustment joint using a chair with a backrest as an example, and summarizes the results in a single column table. If we divide the functions necessary for a backrest chair into unit functions, function 1 is ``narrowing the arm angle.''

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Function 2 is to "expand the arm angle." Function 3 is ``fixing the arm angle.'' Function 4 is [remove the switch 1 - collar and make the arm 3 open and close]. Function 5 is ``remove the collar and return it to its original position to fix the angle of the arm''. There is. In order to express those functions, the parts of the chair must be moved to correspond to those functions. Furthermore, five different unit operations are required for each part of the chair to be moved.

Function 1- and function 2 are positioning functions for moving the back plate to a position where it is to be fixed. In order to achieve this function, the angle formed by the joint arms 3 and 6, which are parts of the chair, must be narrowed or widened.

Function 3 is that when a person sits down and leans against the backboard, the backboard must be secured with a stopper to prevent it from falling backwards. In order to perform this function, the stopper must be engaged with the anti-reverse gear.

Function 4 is to remove the stopper and fold the back plate into the T position.
A-, -1--ri-- This is done by function 3.
This is a necessary function to remove this and tilt the back board to any position backwards even if it is stuck.In order to perform this function, the stopper, which is a part of the chair, must come off from the anti-reverse gear. Must be.

Function 5 is to move the backboard to the desired rear position with the backboard being able to move backwards in function 4, and then
This function secures the backboard so that it does not fall backwards. To do this, the parts of the chair, the seat, must be engaged with the anti-reversal gear again.

The above-mentioned five functions are necessary for a backrest chair, and in order to perform each function, the parts of the chair must be moved as shown in the second column ['' in Figure 1].

Five operations are then required for the chair parts to be moved as described above. Of these, operation 3 is automatically operated by the force of the spring, so the remaining four operations are required.

----t4 -' - Operations 1.2.3 are the same in the conventional method and the present invention, but the operations of removing the stopper, moving the back plate, and reapplying the stopper are different. That is, in the conventional method, operation 4 for moving the back plate rearward is solved by tilting the back plate forward to the maximum limit, and operation 5 is solved by tilting the back plate backward in a 1-pie angle. However, this operation 4.5
The operation movement was too large, so not only could it not be operated while sitting on the chair, but it also had the disadvantage that the angle could not be adjusted unless there was space behind the chair.

(Means for Solving the Problems) In order to eliminate the drawbacks of the above-mentioned conventional methods, the present invention has investigated adjusting the fixed angle of a joint without using a lever and with only a simple small movement.

Hereinafter, a description will be given by taking as an example a backrest chair in which the arms 3 and 6 of the fixed angle adjustable joints are respectively connected to the back plate and seat plate of the backrest chair. In steps 1 and 2 of Fig. 1, position the back board by moving it back and forth, step 4, raise the back board slightly to remove the foot trunk, and step 5, move the back board even more slightly. The structure is such that by raising the shaft, the collar can be re-engaged with the anti-reverse gear.

To raise and secure the backrest, simply pull the backrest forward. To fix the backrest by folding it down, pull the backboard forward by an angle of 1/2 to 1 tooth of the reverse prevention gear 2. position, and then pull the back plate forward again by an angle equal to or less than the number of teeth of the reversing prevention gear 2, so that the stopper that has come off is automatically engaged with the reversing prevention gear again. This will solve the drawbacks of the conventional method.

(Lecture) FIG. 3 is a side view and a plan view of a fixed angle adjustable joint according to the present invention. Side view A-A cross section, B-B cross section, C-C
The cross sections are shown in FIGS. 4, 5, and 6, respectively.

The joint mechanism of the present invention has the following introduction.

In a fixed angle adjustment joint that includes an anti-reverse gear and a spring-loaded stopper as components, as a mechanism for adjusting and fixing the angle, a) When fixing by narrowing the angle,
There is a mechanism in which the arm 3 connected to the joint is bent in the direction of the arm 6, and the angle is then fixed with a stopper at a narrowed position.0) When the angle is widened and fixed, the arm connected to the joint is first fixed. 3 in the direction of arm 6 and the reverse prevention gear 2 is 1
Remove the stopper by bending it by an angle of /2 to 1 tooth, then extend the arm 3 in the opposite direction to the arm 6 to the desired position, and then move the arm 3 in the direction of the arm 6 until the anti-reverse gear is in position 1. We have adopted a fixed angle adjustment joint mechanism that combines a mechanism in which a stopper is applied and fixed again by bending by an angle of /2 to 1 tooth or less.

As one embodiment of the fixed angle adjustment joint for realizing a manako mechanism, an arm 3 has a shaft hole 1 and a reversal prevention gear 2 at one end, and a stopper 5 that fits into the shaft hole 4 and the gear 2 at one end. In a fixed angle adjustment joint in which arms 6 having a common shaft 7 are passed through their respective corresponding shaft holes so as to be rotatable in the forward rotation direction, the arm 6 has substantially the same shape as the anti-reverse gear 2, only the teeth are The long gear 9, which has a notch-shaped groove 1 and a hebber receiving part 8 on a part of the tooth tip, is coaxially connected to the anti-reversal gear 2, and both gears are rotated in the forward rotation direction by an appropriate mechanism. We have completed a fixed angle adjustable joint that rotates in conjunction with each other and rotates independently in the opposite rotation direction. The positive rotation direction referred to here means rotation in a direction in which the angle formed by arms 3 and 6 becomes narrower.

In this joint, the upper gear 9 is set coaxially with the anti-reverse gear 2, and the upper gear 9 is set coaxially with the anti-reverse gear 2 in the forward rotation direction.
An appropriate mechanism that rotates in conjunction with and rotates individually in the reverse direction is, for example, serrated teeth j1. C10; a, l □
There are mechanisms such as a mechanism in which b is pressed by a spring 12 that can only rotate in one direction, a mechanism for preventing reverse rotation 1+, and a mechanism in which a wheel is combined with a swivel and a collar.

Furthermore, in the case of a 1-hetuber used in the parts of the product of the present invention, it may be made of one or two pieces of quince. In addition, the spring for pressing the spring against the anti-reverse gear can be used even if it is not specified as long as it fulfills its function.The arm 3.6 is shaped like a pipe, and - 111-8-- Drill the bolt holes and make three '4 grooves that can be connected to the back plate, seat plate, etc.

(Function) The arm 3 of the fixed angle adjustable joint of the present invention is connected to the back plate, and the arm 6
The effect will be explained using an example of a reclining chair with a seat connected to the seat. FIG. 4 shows the back plate folded back. When the backboard is raised from this position, the arm 3 connected to the backboard rotates in the forward direction as shown by the arrow in FIG. At this time, the stopper 5 is arranged so as not to prevent the rotation of the reverse prevention gear 2 and the stopper pusher gear 9, and both the reverse prevention gear 2 and the pusher gear 9 are connected to the serrated gears 10a, ], Ob. It rotates in the forward direction as it engages, and stops when the sea urchin reaches a predetermined angle (J in Figure 7). When you lean on the back board, a force is applied to the arm 3 shown in Fig. 7 in the opposite rotation direction, but the spring 11 presses the stopper 5 against the anti-reverse gear 2 and they engage, so the back board is rotated. I can't fall down.

Next, when tilting the back plate backward from the position shown in Figure 7 to adjust the angle of the back plate deeper, raise the arm 3 slightly from the position shown in Figure 7, and move the stopper push-up gear 9 to the position shown in Figure 8. Place the stopper on the part 8 of the I~bar holder, remove it from the reverse prevention gear 2, and then push the back plate backwards again.The arm 3 can be moved backwards as shown in Figure 9, so when it is at an appropriate angle, press it again. When the back plate is slightly moved forward, that is, in the forward rotation direction, at the point where the teeth of the anti-reverse gear 2 and the stopper push-up gear 9 overlap, the swivel collar 5 engages with the anti-reverse gear 2 again, and the back plate moves backward. I can't fall down.

(Effects of the Invention) As described above, according to the present invention, there is no need to open or close the joint to adjust the fixed angle as in conventional fixed angle adjustment joints, and the small You can now easily adjust the angle with your movements. In addition, when this is used as a joint for a backrest chair, the angle of the backboard can be easily changed and fixed even while sitting, even if there is an obstacle behind the backboard.

・i 9 Brief explanation of the plane Figure 1 shows a conventional fixed angle adjustment joint, where a is a partially cutaway plan view, b is a side view, and C is a view when the stopper attachment/detachment device pushes up the stopper. A sectional view taken along line A-A is shown.

FIG. 2 shows a motion analysis table for the fixed angle adjustment joint 1f9.8.

FIG. 3 shows a side view and a plan view of one embodiment of the fixed angle adjustable joint of the present invention.

FIG. 4 shows a sectional view taken along the line AA in FIG. 3.

FIG. 5 shows a sectional view taken along line BB in FIG. 3.

FIG. 6 shows a sectional view taken along the line CC in FIG. 3.

FIG. 7 shows a sectional view taken along line A-A when the stopper is engaged with the anti-reversal gear with the joint bent.

Fig. 8 is an A-A 1IJi plane view with the joint bent and the sill and flange engaged with the cutout-shaped stopper receiving portion 8 of the stopper push-up gear 9, and the sill and flange removed. show.

Figure 9 shows the notched stopper receiver after the stopper is removed.
-1, 1---A cross-sectional view taken along line A-A when the anti-reverse gear is rotating in the opposite direction while riding on part 8.

1 is the shaft hole. 2 is the anti-reverse gear. 3 and 6 are arms. 5 is a stopper. 7 is the common axis. 8 is a notched stopper receiving part. 9 is the stopper push gear. 10a and 10b are serrated gears. 11,
12 is a spring. ]3 Conventional stopper attachment/detachment device. 1
4 is the operating protrusion of the stopper attachment/detachment device.

Claims (1)

[Claims] 1) In a fixed angle adjustment joint that includes an anti-reverse gear and a spring-loaded stopper as components, the mechanism for adjusting and fixing the angle is: (a) when narrowing and fixing the angle, A mechanism that fixes with a stopper at a position where the angle is narrowed by bending one connected arm in the direction of the other arm, and (b) When fixing with a wide angle, first connect to the joint. Remove the stopper by bending one arm in the direction of the other arm by an angle equal to 1/2 to 1 tooth of the anti-reverse gear, then extend one arm in the opposite direction to the desired position. A fixed angle adjustment joint mechanism that combines a mechanism in which one arm is then bent in the direction of the other arm by an angle less than 1/2 to 1 tooth of a reversal prevention gear, and a stopper is again applied and fixed. 2) One arm has a reverse rotation prevention gear and a shaft hole at one end, and the other arm has a stopper that meshes with the shaft hole and the reverse rotation prevention gear at one end, and the common axis is passed through each corresponding shaft hole, and the rotation is performed in the forward direction. In the fixed angle adjustment joint rotatably connected to the reversal prevention gear, a stopper push-up gear having substantially the same shape as the reversal prevention gear and having long teeth and a notched stopper receiving portion on a part of the tooth tip is coaxially with the reversal prevention gear. A fixed angle adjustable joint in which both gears rotate together in the forward rotation direction and rotate individually in the reverse rotation direction using an appropriate mechanism.