JPH0427397Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to the improvement of a lever mounting device.
More specifically, the present invention relates to a device for attaching a lever such as a lock lever for adjusting the vertical angle of a seat plate of a chair.

[Conventional technology]

As shown in FIG. 6, a conventional lever mounting device attaches a screw to a frame a of a device such as a chair to which it is attached using a mounting bracket c having a recess capable of rotatably accommodating a lever shaft b. In order to stop the lever and prevent it from coming off, it is necessary to attach an E-ring d or a split pin to at least two places on the shaft of the lever, which increases the number of parts and makes it difficult to assemble the lever. This was not only labor-intensive but also expensive.

[Problem that the invention attempts to solve]

In view of the above-mentioned situation, the present invention aims to solve the problem by making it possible to extremely easily install the lever without using tools, etc.
The object of the present invention is to provide a lever mounting device that has a small number of parts and can reduce costs.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention has been developed by forming an annular groove for supporting the shaft by leaving an end on one end of the shaft, and a lever with a handle on the other end, and a lever in the center. A hole into which the annular groove of the lever can be rotatably fitted is formed in the part, a double-opening main leg is formed on one side, and an auxiliary leg is formed on the other side across the hole, and the A bearing formed with a cutout groove that communicates with the hole from the outside of the intermediate portion of the auxiliary leg and has a closed portion formed in the communication portion with the hole, and a bearing formed on both sides of the upper plate that is open downward. A frame body having a through hole drilled on the opposing surface through which the shaft body of the lever can be rotatably inserted, and a notch for accommodating the shaft body formed in both brackets extending upward on both sides of the mounting part. and a support that can form a gap approximately equal to the thickness of the bearing between the inner surface of the side plate of the frame and the outer surface of the bracket when assembled in relation to the frame, and the shaft of the lever is inserted into one of the through holes of the frame from the outside, and is rotatably fitted by passing through the annular groove of the shaft through the hole of the bearing while expanding the closed portion of the notch groove, and Insert the tip of the shaft into the other through hole, further position the bearing in a fitted state between the side plate of the frame and the bracket of the support, and bring the main leg into contact with the lower surface of the upper plate of the frame. A lever mounting device was constructed.

[Effect]

The lever mounting device of the present invention having the above-mentioned contents is constructed by inserting the shaft of the lever into a through hole bored in the opposing surfaces of both sides of a frame formed on the lower surface of a seat plate support of a chair, etc. , the shaft body is supported in the orthogonal direction, and the annular groove of the shaft body is rotatably fitted by passing the annular groove of the shaft body into the hole of the bearing while expanding the closed part of the notch groove; is positioned in a fitted state between the side plate of the frame body and the bracket of the support body, thereby preventing the shaft body of the lever from coming off in the longitudinal direction, and the main leg of the bearing is fitted into the frame body. By mounting the upper plate (seat plate support) in contact with the lower surface, part of the load applied to the frame is dispersed to the shaft body via the bearing, and the sliding that occurs between the through hole and the shaft body is reduced. This suppresses the generation of moving noise.

〔Example〕

Next, the present invention will be further explained in detail based on the embodiments shown in the accompanying drawings.

FIGS. 1 and 2 a and 2b show typical embodiments of the main parts of the present invention, where A indicates a lever and B indicates a bearing, respectively. Moreover, FIGS. 3 to 5 show an embodiment applied to a chair, where C indicates a frame body and D indicates a support body, respectively. The present invention uses a lever A, which is mainly used as a lock lever for adjusting the vertical angle of the seat plate of a chair, to be interrelated between a frame C to which the seat plate is attached using a bearing B, and the rear part of a support D attached to the leg. By attaching the frame C to the front part of the support D and rotating the lever A, the vertical angle of the frame C, whose approximately central part is pivotally supported so as to be tiltable back and forth with respect to the front part of the support D, is adjusted. In the following, we will explain in detail the case where the device is used as a seat plate of a chair, but the present invention is not limited thereto and can be applied to various levers.

The lever A has an annular groove 2 for supporting the shaft by leaving an end at one end of the shaft 1, and a handle 3 is provided at the tip of the shaft 1 which is bent at the other end. A bulge 4 for adjusting the vertical angle of the seat plate, etc. of the chair is bent in the middle portion of the shaft 1 in the longitudinal direction. In this embodiment, the bulging portion 4 is provided for use in adjusting the vertical angle of the seat plate of the chair, but when used for other purposes, the bulging portion 4 may be replaced with an appropriate operating portion. It is also possible.

The bearing B is made of an elastic material, such as synthetic resin, and has a hole 5 in the center into which the annular groove 2 of the lever A can be rotatably fitted, and a hole 5 on one side that is open on both sides. A main leg 6 is formed, and an auxiliary leg 7 is formed on the other side with the hole 5 interposed therebetween, and the auxiliary leg 7 communicates with the hole 5 from the outside of the intermediate portion, and also communicates with the hole 5. A notched groove 9 with a closed portion 8 formed therein is formed. In addition, the auxiliary leg 7 has a thin width, and a stepped portion 1 is provided in order to make it easier to expand to both sides when fitting the annular groove 2 of the lever A.
0, and the outer contact surface 11 of the main leg 6 is inclined to give elasticity to the main leg 6 and to take into consideration the clearance at the mounting position.

As shown in FIGS. 4 and 5, the frame C has a structure in which a seat plate can be attached to the upper surface of the upper plate, and the lower part is open so that a support D, which will be described later, can be placed between the two side plates C1 and C1. The upper part can be installed internally, and the both side plates C
1 and C1 are provided with through holes 12 and 13 in which the shaft body 1 of the lever A can be rotatably inserted and supported.

The support D is, as shown in FIGS. 4 and 5,
It has a mounting part 15 that is fixed to the upper end of the support leg 14 of the chair, and a plurality of ribs D1, . Brackets D2, D2 are extended upward from the upper end of D1, and the brackets D2, D2 are extended upwardly from the upper end of D1.
2 is formed with an upwardly open notch D3 capable of accommodating the shaft body 1 of the lever A. The center portions of the side plates C1, C1 of the frame C are attached to the front portions of the brackets D2, D2, integrally formed with the lower surface of the seat plate support 16 as the upper plate, or formed separately. are rotatably connected at appropriate positions by a pivot 17, and the rear part of the frame C is locked to the tip of a spring shaft 19 connected to a compression spring 18 attached to the support D.
The frame C including the seat plate support 16 is always elastically biased downward so that it can be tilted forward about the pivot 17 against the compression spring 18. A bearing B is mounted between the side plate C1 of the frame C and the bracket D2 of the support D, so that the lever A can be rotated and prevented from coming off. Here, when the frame C is connected to the support D, the distance between the inner surface of the side plate C1 and the outer surface of the bracket D2 is approximately equal to the thickness of the main body excluding the tip of the main leg 6 of the bearing B. There is.

Further, the seat plate support 16 is for attaching a seat plate formed separately from the seat plate support 16 (not shown) to the upper surface, or is for attaching a seat plate formed integrally with the seat plate support 16. It is also possible to form a plate. still,
In FIG. 5, the area surrounding the seat plate support 16 with a broken line indicates the seat plate.

Therefore, when assembling the lever mounting device of the present invention, as shown in FIG.
It is inserted from the outside into the through hole 12 formed in one side plate C1 of the frame C from the tip where the annular groove 2 of the shaft body 1 is formed, and is passed through the bulge 4 of the shaft body 1. While supporting the shaft body 1 at a proper position, inserting the annular groove 2 of the shaft body 1 through the notch groove 9 between the auxiliary legs 7, 7 of the bearing B while expanding the auxiliary legs 7, 7;
It passes through the blocking part 8 and is rotatably fitted into the hole 5, and the tip of the shaft 1 protruding from the bearing B is attached to the other side plate C1 of the frame C facing the through hole 12. It is installed by inserting it into the drilled through hole 13. Then, the bearing B is brought into contact with the inner surface of the side plate C1 of the frame C, and the contact surfaces 11 of the main legs 6, 6,
11 in contact with the lower surface of the seat plate support 16,
As described above, the compression spring 18 and the spring shaft 19 are installed between the frame C and the rear part of the support D. In this assembled state, as shown in FIGS. 4c, 4d, and 5, the bearing B is attached to the side plate C of the frame C.
1 and the bracket D2 of the support D, and the outward movement of the bearing B is controlled by the side plate C of the frame C.
1, and inward movement is restricted by a bracket D2 of the support D. Therefore, the shaft body 1, that is, the lever A, in which the annular groove 2 is fitted into the hole 5 of the bearing B, is mounted in a manner that prevents it from coming off. in the end,
The shaft body 1 of the lever A has both the through holes 12 and 13.
The shaft 1 is supported rotatably in the orthogonal direction, and the shaft 1 is prevented from coming off by a bearing B rotatably fitted to the tip of the shaft 1.

In this state, the main legs 6, 6 of the bearing B are in contact with the inner surface of the side plate C1 of the frame C, and the contact surfaces 11, 11 of the end faces are in contact with the lower surface of the seat plate support 16. , the load acting on frame C is
2 and 13 to the shaft body 1 of the lever A, and at the same time passes through the main legs 6 and 6 of the bearing B from the lower surface of the seat plate support 16 and is dispersed into the annular groove 2 through the hole 5. Since the load applied to the through hole 13 is reduced, the generation of sliding noise due to the shaft body 1 and the through hole 13 can be suppressed, and the lever A can be mounted more firmly and without rattling.

In addition, FIGS. 4a and 4c show the bulging portion 4 of lever A.
The figure shows a state in which the seat plate support 16 is tilted most backward, and if a load is applied to the front part of the seat plate support 16 in this state, the pivot point will resist the spring bias of the compression spring 18. It tilts forward with 17 as the axis,
If this load is removed, it will return to its original backward tilted state. 4b and d show that the bulging part 4 of the lever A is made to hang upright, and the bulging part 4 is pressed against the upper surface of the rib D1 formed inside the mounting part 15, and the pivot shaft 17 is pivoted. When the seat plate support 16 is tilted forward (actually in a substantially horizontal state) and fixed, that is, the bulging portion 4 is positioned rearward from the center of rotation of the shaft 1 on the upper surface of the mounting portion 15. , shows a state in which the rear part of the seat plate support 16 is pushed upward by contacting the rear wall D4 of the mounting part 15. Here, the bearing B is displaced upward together with the frame C, but even in this state, at least the tips of the auxiliary legs 7, 7 are connected to the bracket D2 of the support D.
is in contact with the outer surface of In this state, even if a load is applied to the rear part of the seat plate support 16, the bulge 4
The shaft body 1 is fixed without tilting backward, which is deviated from the axis of rotation of the shaft body 1, and a forward leaning posture can be maintained during work. In this way, the lever A is a lock lever for adjusting the vertical angle of the seat plate of the chair, which can be rotated to set the seat plate support 16 in a relaxed state by tilting it backwards and a working state by tilting it forward. It can be used as

[Effect of idea]

According to the lever mounting device of the present invention as described above, the lever is configured such that an annular groove for supporting the shaft is formed by leaving an end at one end of the shaft body, and a handle is provided at the other end. A hole is formed in the center part into which the annular groove of the lever can be rotatably fitted, and a double-opening main leg is formed on one side, and an auxiliary leg is formed on the other side across the hole. , furthermore, a bearing formed with a cutout groove communicating with the hole from the outside of the intermediate portion of the auxiliary leg and having a closed portion formed in the communicating portion with the hole, and a bearing formed with a downwardly open groove formed on both sides of the upper plate. The shaft body is accommodated in a frame body having a through hole formed in the opposing surfaces of both side plates through which the shaft body of the lever can be rotatably inserted, and in both brackets extending upwardly on both sides of the mounting part. The support body is formed with a notch and is capable of forming a gap approximately equal to the thickness of the bearing between the inner surface of the side plate of the frame and the outer surface of the bracket when assembled in relation to the frame. The shaft of the lever is inserted from the outside into one of the through holes of the frame body, and the annular groove of the shaft is passed through the hole of the bearing while expanding the closed part of the notch groove, so that it can be rotated. and insert the tip of the shaft body into the through hole on the other side, and further position the bearing in a fitted state between the side plate of the frame and the bracket of the support body, and place the main leg on the lower surface of the upper plate of the frame. By simply touching the lever, the lever can be installed firmly and without any wobbling, and the installation process does not require the use of any tools, and the number of parts is small, reducing costs. be. By the way, if the bearing is made of synthetic resin, the occurrence of metallic noise or friction due to the rotational operation of the lever can be further reduced, and smooth operation can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the lever, Fig. 2a is a front view of the bearing, Fig. 2b is a side view of the bearing, and Fig. 3 is a partially omitted perspective view showing the assembled state of the lever mounting device of the present invention. , Fig. 4a is a partially omitted longitudinal side view showing the state in which it is attached to a chair, and Fig. 4b is a partially omitted longitudinal side view showing the state in which the seat plate of the chair is tilted forward by operating the lever. , Fig. 4c is an enlarged longitudinal sectional front view of the main part in the state shown in Fig. 4a, Fig. 4d is an enlarged longitudinal sectional front view of the main part in the state shown in Fig. 4b, and Fig. 5 shows the state when it is attached to a chair. A partially cutaway plan view and FIG. 6 are explanatory partial perspective views showing a conventional example. A... Lever, B... Bearing, C... Frame, D...
... Support body, 1 ... Shaft body, 2 ... Annular groove, 3 ...
Handle, 4...bulge, 5...hole, 6...main landing gear, 7
... Auxiliary leg, 8 ... Obstruction part, 9 ... Notch groove, 10
...Stepped portion, 11...Abutment surface, 12...Through hole, 13
...Through hole, C1... Side plate, 14... Support leg, 15...
...Mounting part, D1...Rib, D2...Bracket,
D3...Notch, D4...Rear wall, 16...Seat plate support, 17...Pivot, 18...Compression spring, 19...
spring shaft.

Claims (1)

[Claims for Utility Model Registration] A lever having an annular groove for supporting the shaft with an end remaining at one end of the shaft, and a handle provided at the other end, and the lever at the center thereof. A hole is formed into which the annular groove can be rotatably fitted, a main leg is formed on one side, an auxiliary leg is formed on the other side with the hole in between, and a main leg is formed in the middle of the auxiliary leg. a bearing formed with a notched groove that communicates with the hole from the outside and has a closed portion in the communicating portion with the hole; A frame body is formed with a through hole through which the shaft body of the lever can be rotatably inserted, and a notch for accommodating the shaft body is formed in both brackets extending upwardly on both sides of the mounting part, a support that can form a gap approximately equal to the thickness of the bearing between the inner surface of the side plate of the frame and the outer surface of the bracket when assembled in relation to the frame; The shaft body is inserted into one of the through holes from the outside, and the annular groove of the shaft body is passed through the hole of the bearing while expanding the closed part of the notch groove, and the shaft body is rotatably fitted. The tip of the lever is inserted into the other through hole, the bearing is fitted between the side plate of the frame and the bracket of the support, and the main leg is brought into contact with the lower surface of the upper plate of the frame. Tori.