JPH0518563B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a method for changing and adjusting the inclination angle of the back part with respect to the seat part by interposing the seat part and the back part of a chair, for example. This invention relates to angle adjustment fittings used for.

(Prior art) Conventional angle adjustment fittings of this type are, for example,
As shown in Japanese Patent No. 57-129452, a swinging body is provided with a ratchet gear for mounting a swinging member such as the back in a metal fitting body to which a base material such as the seat is attached, and a ratchet gear meshing with the ratchet gear of the swinging body. The ratchet claws are each pivotally supported, and the engagement of the claws with the ratchet gear prevents the swinging body from swinging in one direction with respect to the metal fitting main body. The inclination to the seat is maintained at a predetermined angle.

(Problem to be Solved by the Invention) However, according to the above-mentioned angle adjustment fitting, when it is desired to change the inclination angle of the back of a chair attached to the rocking body, for example, the back has to be held by hand each time. Of course, if you want to make the back part tilt greatly in the unfolding direction with respect to the seat part, first fold the rocking body against the metal fitting main body via the back part, After the ratchet pawl and the ratchet gear are disengaged by a cam plate pivotally supported on the metal fitting body, the swinging body is once expanded to the metal fitting body via the back portion, and then the swinging body is opened again. The movable body must be swung in the folding direction with respect to the metal fitting body, and therefore, it takes time and effort to adjust the angle of the rocking body with respect to the metal fitting body, and the operability is also poor.

Therefore, the present invention allows the swinging body to swing in both directions with respect to the metal fitting body from any position, and the inclination angle of the rocking body with respect to the metal fitting body can be finely adjusted in multiple steps. To provide an angle adjustment fitting that can securely and firmly hold the rocking body in an adjusted position.

(Means for Solving the Problems) The present invention provides an angle adjustment fitting that supports a swinging member to freely swing relative to a base material and adjusts the support angle of the swinging member with respect to the base material. , a oscillating body attached to the oscillating member side is pivotably supported on a metal fitting body attached to the base material side,
A pinion that is concentric with the pivot center of the pivot body is provided at the pivot center of the pivot body, and a first tooth that meshes with the pinion and a pitch smaller than the first tooth is provided on the metal fitting body. A rack having a second tooth is provided to be freely movable, and a blocking body for preventing movement of the rack is provided to the metal fitting body to be freely movable in a direction perpendicular to the moving direction of the rack, and The present invention is characterized in that a plurality of engaging teeth are provided that mesh with the second teeth of the rack, and that the blocking body is biased in the direction of engaging with the rack.

(Function) According to the present invention, by simply releasing the engagement of the blocking body with the engaging body by operating the blocking body,
Of course, it is possible to immediately adjust the inclination angle of the rocking body with respect to the metal fitting body by swinging the rocking body in either the unfolding or folding direction with respect to the metal fitting body, and also to adjust the inclination angle of the rocking body with respect to the metal fitting body. The pitch of the second tooth of the rack that engages with the engaging tooth of the body is made smaller than the first tooth of the rack that meshes with the pinion, and the blocking body is free to move in a direction opposite to the moving direction of the rack. by forming a plurality of engaging teeth that engage with the second teeth of the rack on the entire surface of the blocking body facing the rack,
In addition to the engagement between the pinion and the rack,
The load acting on the blocking body can be dispersedly received by each of the engaging teeth of the blocking body, and the engagement between the blocking body and the rack can be reliably secured, and at the same time, the second Since the pitch of the teeth is smaller than in the first field, the inclination angle of the rocking body with respect to the metal fitting body can be finely adjusted via the blocking body.

(Example) Examples of the present invention will be described below based on the drawings.

The angle adjustment fitting shown in the figure is used to support the back part B on the seat part A of the chair in a freely adjustable angle as shown in Fig. 3. A metal fitting main body 1 that fixes the part A, a rocking body 2 that fixes the back part B, a rack 3 that engages with a pinion 23 that is assembled to the rocking body 2, and a blocking body 41 that prevents movement of the rack 3. and a control means 4 equipped with an operating lever 42 for operating the blocking body 41.

The metal fitting main body 1 shown in the figure includes a pair of side walls 11 and 12 facing each other at a predetermined interval, and these side walls 1.
It consists of a bottom wall 13 connecting the lower ends of 1 and 12,
A first attachment part 10 for attaching the seat frame A is integrally formed at one end thereof, and the side wall 11,
12, the upper wall 1 only between the upper ends of the first mounting portion 10 side.
4, and a pivot 15 is non-rotatably mounted between the side walls 11 and 12 on the opposite side from the first mounting portion 10.

Further, the rocking body 2 includes a pair of opposing walls 21 and 22 that are substantially disc-shaped and that face each other.
1, a pinion 23 having a large number of teeth 23a with a large tooth pitch is attached only to a part of its outer periphery, and a second attachment part 20 for attaching the back frame B is integrally formed on one end of the pinion 23. There is.

This rocking body 2 includes a side wall 11 of the metal fitting main body 1,
12 between the rack 3 and the first mounting portion 10 of the metal fitting body 1 so as to be freely swingable, in other words, to be freely unfolded or folded with respect to the metal fitting main body 1. A coil spring 24 is interposed between them, and the spring force of the coil spring 24 presses the rack 3 in the right direction in FIG. 1 and urges the rocking body 2 in the counterclockwise direction in FIG. This is how it is done.

Further, on the upper surface of the rack 3, a first tooth 31 with a large pitch engages with the tooth 23a of the pinion 23 assembled to the rocking body 2, and a first tooth 31 with a large pitch engages with the engagement tooth 41a of the blocking body 41. The rack 3 is movably mounted on the bottom wall of the metal fitting main body 1, and a small second tooth 32 is provided.
By engaging the first teeth 31 formed on the rack 3 with the teeth 23a of the pinion 23, the movement of the rack 3 causes the rocking body 2 to be moved relative to the metal fitting body 1 via the pinion 23. I try to make it oscillate.

Further, the blocking body 41 constituting the control means 4
has a plurality of engaging teeth 41a on its lower surface that engage with the second teeth 32 of the rack 3, and the metal fitting main body 1
is assembled between both side walls 11 and 12 so as to be freely movable up and down by a predetermined stroke, and one end of the operating lever 42 is pivotally supported on the outer surface side of the side wall 12, and the blocking body 41 is interlocked and connected to the operating lever 42. That's what I'm doing.

Specifically, a pair of guide walls 16 and 17 extending vertically and in parallel are provided between the side walls 11 and 12, and the blocking body 41 is provided between the guide walls 16 and 17.
The plate spring 43 is interposed in a direction perpendicular to the moving direction of the rack 3, that is, freely movable up and down, and is formed in a curved shape between the blocking body 41 and the upper wall 14 of the metal fitting main body 1. The spring force of the leaf spring 43 urges the blocking body 41 downward, and the blocking body 41 is normally engaged with the rack 3.

Further, the operating lever 42 is pivotally supported on the side wall 12.
The blocking body 41 is interlocked and connected to the operating lever 42 by inserting and holding the screw 44 into the blocking body 41 through the elongated hole 12a formed in the side wall 12. The operating lever 42
1, in other words, by pulling up the operating lever 42, the blocking body 41 is moved upward and the engagement between the blocking body 41 and the engaging body 3 is prevented It is done as if it were released.

As shown in FIG. 3, the angle adjustment fitting having the above structure has the seat part A of the chair attached to the first attachment part 10 of the fitting body 1, and the second attachment part 20 of the rocking body 2 to the seat part A of the chair. The back part B of the chair is used with each seat fixed, and the operation of the angle adjustment fitting used in the chair as described above will be explained next.

Normally, the blocking body 41 is urged downward by the spring force of the leaf spring 43 and engages with the rack 3, so that the movement of the rack 3 is prevented, and therefore the rocking body 2 does not swing with respect to the metal fitting body 1, and the back part B of the chair is held at a predetermined angle with respect to the seat part A.

Then, a person sitting on the chair changes the inclination angle of the back part B with respect to the seat part A,
For example, if you want to make the back part B stand up further than the state shown in FIG. 3, pull the operating lever 42 upwards (in the clockwise direction in FIG.
All that is required is to release the engagement relationship between the upper part of the body and the blocking body 41 and to raise the upper body resting on the back part B to a desired position. The back part B of the chair swings counterclockwise in Figure 3 due to the spring force, and the back part B of the chair follows the upper body and immediately comes into contact with the back. After confirming this, if the lifting operation of the operating lever 42 is released and the rack 3 is fixed to the metal fitting main body 1 by the blocking body 41, the swinging body 2, in other words, the back B is at the desired position. It will be held in an upright position again.

For example, when the back part B is further expanded to the seat part A from the state shown in FIG. 3, the operating lever 42 is pulled upward (in the clockwise rotation direction in FIG. If you release the engagement relationship with 41 and then tilt your upper body, the back part B
At the same time, the swinging body 2 swings in the clockwise rotation direction in FIG. 4 against the coil spring 24.

Then, when the upper body reaches the desired position, the lifting operation of the operating lever 42 is released and the engaging body 3 is fixed to the metal fitting main body 1 by the blocking body 41 in the same manner as described above. In other words, the back portion B is held in an upright position again at the desired position.

On the other hand, when the chair is not in use, the rocking body 2 is rocked counterclockwise in FIG. 3 by the spring force of the coil spring 24 by pulling up the operating lever 42, as described above. From the stage when the teeth 23a of the pinion 23 of the rocking body 2 that engage with the teeth 31 of the rack 3 disappear, the rocking body 2 becomes free with respect to the metal fitting main body 1, so that the back part B is connected to the seat part. It can be folded against A.

In the above embodiments, the angle adjustment fitting according to the present invention was used to attach the back to the seat of a chair, but it is not limited thereto. It may also be used to support the leg body in an adjustable manner.

Furthermore, in the above practical example, a coil spring 24 was interposed between the rack 3 and the first attachment part 10 of the metal fitting main body 1, but as schematically shown in FIG. Said axis 15
The periphery of the shaft support is bulged outward to provide a housing chamber 16 for accommodating a spiral spring 25, which will be described later.
One end of a spiral spring 25 interposed in the accommodation chamber 16 is connected to the pivot shaft 15, and the other end is connected to the swinging body 2, respectively, and the spring force of the spiral spring 25 causes the swinging body 2 to be connected to the metal fitting body 1. It may be made to be biased in the folding direction against the folding direction.

(Effects of the Invention) As described above, the present invention allows the swinging body attached to the swinging member side to be freely pivoted on the metal fitting body attached to the base material side, and the swinging center of the swinging body is , a rack is provided with a pinion concentric with the rocking center of the rocking body, and the metal fitting body is provided with a first tooth meshing with the pinion, and a second tooth having a smaller pitch than the first tooth. A plurality of blocks are provided to be freely movable, and a blocker for blocking movement of the rack is provided to be freely movable in a direction perpendicular to the moving direction of the rack, and a plurality of blocks are engaged with the second teeth of the rack. In addition to providing engaging teeth, the blocking body is biased in the direction of engagement with the rack, so that by operating the blocking body, the rocking body can be expanded or folded relative to the metal fitting body. Of course, the inclination angle of the oscillating body with respect to the metal fitting body can be quickly adjusted by immediately oscillating the oscillating body in the direction of . Therefore, after the blocking body is operated, the rocking body can be reliably held at the adjusted position.

Moreover, according to the present invention, the pitch of the second teeth of the rack that engages with the engagement teeth of the blocking body is made smaller than the first teeth of the rack that meshes with the pinion, and A plurality of engaging teeth are formed on the entire opposing surface of the blocking body facing the rack, and are provided to be freely movable in a direction opposite to the movement direction, and engage with the second teeth of the rack. The engagement with the rack can be firmly maintained, and the load applied to the blocking body through the rack can be distributed and received by each of the engaging teeth of the blocking body, so that the blocking body and the rack can be firmly maintained. The second tooth has a smaller pitch than the first tooth, so that the inclination angle of the rocking body with respect to the metal fitting body can be maintained through the blocking body. can be finely adjusted.

In short, according to the present invention, it is possible to more finely adjust the inclination angle of the oscillating body to the metal fitting body, and at the same time, it is possible to reliably and firmly hold the oscillating body to the metal fitting body.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the angle adjustment fitting according to the present invention, FIG. 2 is a sectional view taken along the line of FIG. Schematic side view showing the state used in the binding site, No. 4
The figure is a sectional view of main parts showing another embodiment. 1... Metal fitting body, 2... Rocking body, 23... Pinion, 3... Rack, 31... First tooth, 32...
Second tooth, 41...blocker, 41a...engaging tooth.

Claims (1)

[Claims] 1. Support the swinging member so that it can swing freely relative to the base material,
An angle adjustment fitting for adjusting the support angle of the swinging member with respect to the base material, wherein a swinging body attached to the swinging member side is pivotally supported on a metal fitting body attached to the base material side, so as to freely swing. , a pinion concentric with the pivot center of the pivot body is provided at the pivot center of the pivot body; A rack having small second teeth is provided to be freely movable, and a blocking body for preventing movement of the rack is provided to the metal fitting body to be freely movable in a direction perpendicular to the direction of movement of the rack, and the blocking body An angle adjustment fitting characterized in that a plurality of engaging teeth are provided that mesh with the second teeth of the rack, and the blocking body is biased in a direction to engage with the rack.