JP5885771B2 - Chair armrest - Google Patents

Description

The present invention relates to an armrest equipment for chairs.

  Various mounting structures for armrest devices have been proposed for chairs. As an example, Patent Document 1 discloses that a duct-like support member that opens to the left and right is fixed to the lower surface of a seat plate, and a base end portion of an armrest device is inserted into this support member. In Patent Document 1, a hook is provided at the base end portion of the armrest device. When the base end portion is fully inserted into the support member, the hook engages with the locking means of the support member, and the armrest device is detached from the support member. Held impossible.

CD-ROM of Japanese Utility Model Publication No. 6-82954

  In patent document 1, since the base end part of an armrest device penetrates into a support member deeply, there exists an advantage which can obtain high support strength. However, since a duct-like support member is separately prepared and fixed to the seat plate, the support member protrudes downward from the lower surface of the seat plate, and thus the support member may be exposed to impair the aesthetics. is there.

  The present invention has been made to improve the current situation.

This invention is an armrest apparatus attached to a chair, The armrest apparatus of Claim 1 is
An elbow strut that is arranged on the left and right sides of the seat of the chair in front view of the chair and has an elbow rest fixed or adjustable in height, and a laterally long horizontally extending from the lower end of the elbow strut toward the chair With arm part,
In the configuration in which a left and right side insertion portion that fits into an elbow mounting hole provided in the chair and a protruding portion that overlaps the chair from the outside below the insertion portion are formed at the tip of the arm portion,
A screw insertion hole through which a horizontally long screw for fixing the overhanging portion to the chair is inserted in the overhanging portion so as to open in the left-right direction at a position below the insertion portion. ,
Furthermore, the arm section is intended to be secured only depending on the chair screw inserted through the screw insertion hole of the extending portion,
In the front view of the chair, the vertical thickness of the insertion portion is T, the front-rear width is W, the left-right length entering the elbow mounting hole is L, and from the lower surface of the insertion portion to the center of the screw insertion hole Assuming that the vertical distance is H, T <L and L> H, and the strength to support the load applied to the elbow rest is ensured even if it is fixed only with the screw inserted into the insertion part. I'm coughing.

The armrest device according to a second aspect is the armrest device according to the first aspect , wherein the insertion portion has a front-rear width W larger than a vertical thickness T and a flat upper surface.

In the present invention, since the insertion part of the armrest device enters the elbow mounting hole of the chair, it does not impair the aesthetics. (If the armrest device is not mounted , the chair's elbow mounting hole may be closed with a cap. Will not detract from the beauty.)

  Now, there are two types of armrest devices: a fixed type with a fixed height of the armrest and a movable type that can adjust the height of the armrest. In the case of a mold, an elbow rest is attached to a main body having an elbow strut integrally or separately so that the height can be adjusted. In most cases, the fixed type is made of synthetic resin, and the main body is often made of synthetic resin even if it is a movable type.

  And although the synthetic resin is inferior in strength compared to a metal such as aluminum die-casting, if the present invention is used, the load per unit area can be dispersed by lengthening the insertion portion, so the main body portion including the insertion portion Even if it is made of synthetic resin, a high support strength can be secured. Therefore, it can be said that the present invention is particularly effective when the entire armrest device or the main body is made of resin.

In addition, the insertion part is firmly fitted in the elbow mounting hole, and the load acting on the armrest device acts mainly as a moment on the insertion part and acts to press the overhanging part against the inner surface of the arm part. Even if it is fastened with only the screw that has been inserted, it is firmly fixed to the chair.

It is an external view of the chair which concerns on embodiment, (A) is a front view, (B) is a side view. It is a perspective view in the state where an armrest device was separated. It is a separation perspective view of a base. The perspective view of a principal part, (A) is the figure seen from the top, (B) is the figure seen from the downward direction. It is a separate perspective view of the principal part. (A) is the perspective view in the state which attached the armrest apparatus, (B) is the perspective view which looked at the base from back. It is a figure which shows a modification.

Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to an armrest device attached to a rotary chair that is frequently used for office work. In the following description, the front / rear / left / right wording is used to specify the direction, which is defined as the front direction of the seated person on the basis of the person normally seated in the chair. The front view direction is a direction opposite to the seated person, and the rear view direction is a direction when the seated person is viewed from behind.

(1). Outline of chair As shown in FIGS. 1 and 2, the chair is a leg device displaying only the leg strut (gas cylinder) 1, a base 2 fixed to the upper end of the leg strut 1, and disposed above the base 2. The seat 3 has a backrest 4 arranged behind the seat 4. An armrest device 5 is attached to the base 2 . 1 and 2, only one of the armrest devices 5 is displayed, but a pair of left and right armrest devices 5 are attached.

The backrest 5 is adapted to the basic structure of fixing the back plate (inner shell) 7 to the back frame 6, and stretched cushion body 8 on the front surface of the back plate 7. The back frame 6 is connected to the base 2 so as to be able to tilt backward. When the backrest 4 tilts backward, the seat 3 moves upward while moving upward. That is, the seat 3 is attached to the base 2 via the intermediate member, and the seat 3 moves relative to the base 2. Since these locking mechanisms are irrelevant to the present invention, description thereof is omitted.

The armrest device 5 includes an elbow body 9 that is substantially L-shaped when viewed from the front, and an elbow rest 10 that is adjustable in height. The elbow body 9 includes a horizontally long arm portion 11 and an elbow strut 12 extending upward from one end thereof . An elevating body 13 is mounted on the elbow strut 12 so that the height can be adjusted . An elbow rest 10 is attached to the lifting body 13. The elbow post 12 and the arm portion 11 may be made of different members.

The base 2 is formed with elbow mounting holes 14 opened on the left and right outer sides thereof. On the other hand, at the distal end of the arm portion 11 of the elbow body 9, a laterally- inserted lateral insertion portion 15 that fits into the elbow mounting hole 14 of the base 2, and an overhanging portion 16 that overlaps the outer surface of the base 2 below the insertion portion 15. Are integrally formed, and the overhanging portion 16 is fixed to the base 2 with left and right laterally long screws 17. Details will be described below.

(2) Details of the main part As shown in each figure in FIG. 3 and subsequent figures, the base 2 is composed of a box-shaped base body 19 that opens upward, and one of the interiors of the base body 19 that is disposed at a rearward position. The first metal fitting 20 and a pair of left and right second metal fittings 21 disposed between the front half of the first metal fitting 20 and the base body 19 are provided. These are made of steel plates. The first metal fitting 20 has front and rear foot pieces 22 and is formed in a U-shape opening downward in a side view, and a regulating piece 23 provided on the foot piece 22 is fitted in an engagement hole 24 formed in a bottom plate of the base body 19. Positioning.

The first metal fitting 20 is fixed to the base body 19 by welding. A concentric leg hole 25 is formed in the bottom plate of the base main body 19 and the first metal fitting 20, and a bush 26 is fitted into the leg hole 25, and the bush 26 is welded to the base main body 19 and the first metal fitting 20. doing. The leg support 1 is fitted to the bush 26 from below. Insertion portion 15 of the elbow body 9 is upwardly immovably held in front of the first bracket 20.

The second metal fitting 21 has a side plate 21 a that overlaps the inner side surface of the base 2 and a horizontal portion that extends inward from the upper end thereof. Forming a burring portion 27 inward in the side plate 21a, which in forming a female thread (may be welded nut.). The side plate 21 a of the second metal fitting 21 is exposed to the outside from a rectangular window hole 28 formed in the base body 19, and the screw 17 can be screwed into the burring portion 27 through the window hole 28. Side plate 21a of the second bracket 21 is welded to the inner surface of the base body 19.

Insertion portion 15 of the elbow body 9 is supported from below by the second fitting 22. In other words, a holding part that sandwiches the insertion part 15 of the elbow body 9 from above and below is formed by the first metal fitting 20 and the second metal fitting 21, and most of the elbow mounting hole 14 is configured by this holding part. ing. The left and right elbow mounting holes 14 communicate with each other in series through the space in the base 2. Further, in the window hole 28 of the base body 19, a portion above the upper surface of the second metal fitting 21 constitutes the elbow mounting hole 14. On the inner edge of the window hole 28, a side regulating piece 29 protruding inward is bent. The insertion portion 15 of the elbow body 9 can be held by the side regulating pieces 29 so as not to be displaced forward and backward.

The opposite side of the side plate 21a of the second metal fitting 21 is formed with a downwardly under piece 31, the lower piece 31 is fitted in the engagement holes 33 formed in the land portion 32 of the base body 19. Thereby, the height of the first metal fitting 20 is accurately defined.

The second metal fitting 21 is formed with a pair of front and rear upward pieces 21b , and the first metal piece 21 is supported from below by the upward pieces 21b. The Ri by the upward piece 21b, with the distance between the first bracket 20 and second bracket 21 is defined, the insertion portion 15 of the elbow body 9 is held so as not to shift back and forth. Moreover, while the upward restricting tongue piece 34 projects from the upward piece 21b, the first fitting 20 is formed with an engagement hole 35 into which the upward restricting tongue piece 34 is fitted. And the relative position of the second metal fitting 21 are precisely defined. The first fitting 20 and the second metal fitting 21 are integrated by welding.

For example, as shown in FIG. 4 (B), the overhanging portion 16 of the elbow body 9 in the armrest device 5 protrudes greatly downward from the base end of the insertion portion 15, and a recess opened downward and outward in the overhanging portion 16. 36 is formed so that the head of the screw 17 is hidden in the recess 36. The overhang portion 16, a screw insertion hole 16a of the screw 17 is inserted, it is empty only to open in the lateral direction. Further, the insertion portion 15 has a pin hole 37 opened at its distal end surface. As shown in FIG. 3, the base body 19 is covered from below by a cover 40.

The insertion portions 15 of the left and right armrest devices 5 can be deeply fitted so as to come into contact with each other, and it is preferable that they are so deeply fitted. In this case, it goes without saying that the insertion portion 15 is disposed at a position where it does not buffer with the bush 16. The insertion portion 15, for example, as shown in FIG. 5, in the front view of the chair, the T in the vertical thickness dimension of the insertion portion 15, back and forth width is W, the lateral length L, the insertion portion 15 When the vertical distance from the lower surface of the screw to the center of the screw insertion hole is H, the relationship is T <W and L> H, and it is fixed only by the screw 17 inserted into the insertion portion 15. Moreover, the intensity | strength which can support the load applied to the elbow pad 10 is ensured.
Further, the vertical thickness T is Tsu smaller kuna than lateral length L, a and the upper surface is flat surface.

(3) Summary As described above, the armrest device 5 has the screw inserted from the side into the screw hole 16a of the overhanging portion 16 after the insertion portion 15 of the elbow body 9 is inserted into the elbow mounting hole 14 of the base 2. 17 by a simple operation that would have the screwed in the burring portion 27 of the second bracket 21 is firmly fixed to the base 2. In this state, the insertion portion 15 is sandwiched from above and below by the first metal fitting 20 and the second metal fitting 21, and the overhanging portion 16 overlaps the outer surface of the base 2. High support strength is ensured.

As shown by a one-dot chain line in FIG. 6, the insertion portions 15 of the left and right armrest devices 5 can be integrally connected by inserting pins 38 into the pin holes 37. Then , since the left and right insertion portions 15 are reinforced and integrated with each other, the support strength can be further improved. In particular, the left and right of the insertion portion 15 is a pin 37 thus when connected in a state fitted deeply to or close to contact one another, in particular an increasing unity of both the insertion portion 15 preferably.

  The insertion portion 15 is firmly fitted in the elbow mounting hole 14 formed by the first metal fitting 20 and the second metal fitting 21, and the load acting on the armrest device 5 mainly acts as a moment with respect to the insertion portion 15. Since it acts to press the overhanging portion 16 against the side surface of the base 2, the armrest device 5 can be firmly fixed even by fastening with only one screw 17.

  When the armrest device 5 is not attached, the elbow attachment hole 14 is closed with a cap (not shown). The insertion portion 15 of the elbow body 9 has a mountain shape when viewed from the side, but it can be formed in a simple quadrilateral shape or a kamaboko shape.

(4). Modification (Fig. 7)
FIG. 7 shows a modification. Among (A) is a modification of the second fitting 21, second fitting 21 of the left and right is set in close contact with or closely to each other, and the tip portion forms a downward piece 21d. Reinforcing pieces 21a that are in contact with the lower surface of the base 2 are integrally provided at both front and rear ends of the side plate 21a and at the lower end. For this reason, the side plate 21a can be held so as not to bend, and as a result, the support strength of the armrest device 5 is remarkably increased.

FIG. 7B shows an example of a lid device that closes the elbow attachment hole 14 when the armrest device 5 is not attached. That is, in this example, a lid main body 42 having a hole communicating with the window hole 27 is fitted into the window hole 27 of the base 2, and the lid plate 43 is detachably attached to the lid main body 42. The lid main body 42 has locking claws 42 a, 42 b, 42 d for locking to the base 2. The lid body 42 is always attached to the base 2. The base 2 to which the lid main body 42 is attached is different from the embodiment of FIGS. 1 to 6, and the left and right frames are fixed to the lower surface, and the lid main body 42 is greatly swung upward so as not to interfere with the frame. It has been.

(4). Others The present invention can be embodied in various ways other than the above embodiments. For example, the base can be a die-cast product.

The present invention is useful when applied to an armrest device for a chair . Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Leg support 2 Base 3 Seat 5 Armrest device 9 Elbow body 14 Elbow attachment hole 15 Insertion part of elbow body 16 Overhang part of elbow body
16a Screw insertion hole 17 Screw 19 Base body 20 First bracket 21 Second bracket 26 Bush 37 Pin hole 38 Connecting pin

Claims (2)

An armrest device attached to a chair,
An elbow strut that is arranged on the left and right sides of the seat of the chair in front view of the chair and has an elbow rest fixed or adjustable in height, and a laterally long horizontally extending from the lower end of the elbow strut toward the chair With arm part,
In the configuration in which a left and right side insertion portion that fits into an elbow mounting hole provided in the chair and a protruding portion that overlaps the chair from the outside below the insertion portion are formed at the tip of the arm portion,
A screw insertion hole through which a horizontally long screw for fixing the overhanging portion to the chair is inserted in the overhanging portion so as to open in the left-right direction at a position below the insertion portion. ,
Furthermore, the arm section is intended to be secured only depending on the chair screw inserted through the screw insertion hole of the extending portion,
In the front view of the chair, the vertical thickness of the insertion portion is T, the front-rear width is W, the left-right length entering the elbow mounting hole is L, and from the lower surface of the insertion portion to the center of the screw insertion hole When the vertical distance is H, L> T and L> H are satisfied, and the strength to support the load applied to the elbow rest is ensured even if it is fixed only by the screw inserted into the insertion portion. Coughing,
Chair armrest device. As for the said insertion part, while the front-back width W is larger than the up-and-down thickness T, the upper surface is a flat surface,
The armrest device for chairs according to claim 1.

Images