JPH0574347U - Chair with armrests - Google Patents

Abstract

(57) [Summary] [Purpose] It is easy to manufacture chairs with low yield,
Also, to provide a chair with an armrest that is highly efficient in mounting the armrest. [Structure] In a chair 10 with an armrest, an armrest portion 20
The insertion portion 22 engages with the armrest pressing portion 28 on the one end side 20a thereof, and the projection portion 24 has the through hole 1 on the other side 20b.
It is fitted into the eight holes and positioned with respect to the armrest mounting portion 17, and the fixing screw 19 is screwed into the screw hole 25 through the through hole 18 to be fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chair with an armrest, and more particularly to a fixing structure for an armrest portion.

[0002]

[Prior Art]

 There are a wide variety of chair shapes and materials depending on the purpose of use, but one of the most common shapes is the one with a backrest or armrest. Also, regarding the material, chairs called pipe chairs whose legs are made of pipes are widely used in offices and hotels, and pipe chairs with armrests as shown in Fig. 3 are also often used. ing. In the pipe chair 50, in order to attach the armrest portion 54, a pipe is extended from the front leg portion 56 to above the seat portion 51 to form an armrest attachment portion 57. FIG. 4 shows a fixing structure of the armrest portion 54 in the pipe chair 50 having such a structure. The armrest portion 54 is open at its lower side over the entire length and can be fitted over the armrest attachment portion 57 made of a pipe. Each of the armrests 54 on one side 54a and the other side 54b has a cylindrical protrusion 58 inside the opening, and a screw hole 59 is formed in the center of the protrusion 58. On the other hand, the armrest mounting portion 57 has a through hole 53 at a position corresponding to the two protruding portions 58 in a state where the armrest portion 54 is mounted, and the protruding portion 58 is fitted into the through hole 53 to fit the armrest. The portion 54 is positioned on the armrest mounting portion 57. In this state, the fixing screw 55 is screwed into the screw hole 59 through the through hole 53 to fix the armrest portion 54.

[0003]

[Problems to be solved by the device]

 However, in the pipe chair 50, since the two sets of the protrusions 58 and the through holes 53 are fitted, the positional accuracy of the protrusions 58 and the through holes 53 at the manufacturing stage of the armrest 54 and the armrest attachment 57. Therefore, there is a problem that manufacturing is difficult and yield is high.

Further, two fixing screws 55 are required to fix one armrest portion 54, and the fixing screw 55 must be screwed in four times to attach the armrest portion 54 per leg. There is also a problem that the work is inefficient because it has to be done.

In view of the above problems, an object of the present invention is to provide a chair with an armrest that improves the fixing structure of the armrest part, is easy to manufacture, has a low yield, and has good work efficiency. Is.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the means taken in the present invention has an armrest mounting portion above the stool portion, and the armrest portion is fixed to the armrest mounting portion. The insertion part formed on the end side is engaged with the armrest holding part provided on one side of the armrest mounting part, and a screw hole is provided in the engaging part with the armrest mounting part on the other side of the armrest part. However, the armrest part is fixed by the fixing screw screwed through the through hole formed in the armrest mounting part.

Further, it is preferable that the armrest portion has a protrusion that can be inserted into the through hole at an engagement portion with the armrest attachment portion on the other side, and a screw hole is formed in this protrusion.

Further, the armrest portion has an opening at least on the lower side thereof as an engaging portion for engaging with the armrest mounting portion, so that the armrest portion and the armrest mounting portion can be engaged in a fitted state. Further, it is preferable that the opening has an engaging surface adapted to the outer peripheral shape of the armrest mounting portion inside thereof.

[0009]

[Action]

 In the armchair with the armrest according to the present invention having such means, one side of the engagement between the armrest and the armrest mounting portion includes the insertion portion and the armrest holding portion that do not require strict alignment. It is easy to engage the screw hole and the through hole on the other side into which the fixing screw is screwed, and it is necessary to form the screw hole and the through hole with high positional accuracy. Therefore, the manufacturing is easy and the yield is low. Also, since the armrest part uses one of the two engaging parts as the fixing part with the fixing screw, the work of screwing in the fixing screw required for mounting the armrest part is only required twice for each leg. Work efficiency is improved.

Further, when the protrusion that can be inserted into the through hole is formed on the other side of the armrest, it is possible to prevent the armrest from falling off while the armrest is engaged with the armrest attachment part. It is easy to screw in the fixing screw. Further, since the stress applied to the armrest can be supported by the engaging portion between the protrusion and the through hole, and the stress applied to the fixing screw can be reduced, the fixing screw is hard to loosen.

[0011]

【Example】

 Next, a chair with an armrest according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an armchair according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing a partially enlarged structure of fixing an armrest in the armchair shown in FIG. Is.

In these drawings, the armchair 10 of the present example includes a seat 11, a leg 16 made of a pipe, and armrests 20 located on both sides of the seat 11. ing. The seat portion 11 is composed of a stool portion 12 and a backrest portion 13, and a resin shell 14 which is a base portion (form of the seat portion 11) has a region of the stool portion 12 and a backrest portion 13 integrated with each other. The seat member 11a is fixed to the shell 14.

The leg portion 16 is integrally formed from a single pipe, and the front leg portion 16a extends obliquely forward from the stool portion 12 side and bends rearward at a portion contacting the floor surface. There is. The leg portion 16 bent backward at the contact portion between the front leg portion 16a and the floor surface is bent from the first front leg portion 16a to the second front leg portion 16a at an obtuse angle of 3 degrees while being bent on the floor surface. Is formed as a rear leg portion 16b parallel to the. Further, the front leg portion 16a also extends above the stool portion 12, and the tip end side thereof is bent toward the backrest portion 13 to serve as an armrest mounting portion 17, which is located near the bent portion on the front leg portion 16a side. Has a through hole 18 penetrating the armrest mounting portion 17 from one side to the other side. Further, a shell support portion 16c is provided from the first front leg portion 16a to the second front leg portion 16a.

The seat portion 11 and the leg portion 16 are connected by two engaging portions (not shown) of the shell 14 and the shell supporting portion 16c and a joint 26. The joint 26 is made of resin, and the other side 26b is formed as a connecting portion with the shell 14 and is fixed to the shell 14, while the one side 26a has a side portion projecting laterally. The mounting portion 27 is shaped like a stick, and the mounting portion 27 is inserted and fixed to the end portion 17a of the armrest mounting portion 17, which is the tip of the leg portion 16. Further, an eaves-like armrest pressing portion 28 is formed at the end portion of the one side 26a so that the front end surface and both end surfaces extend toward the mounting portion 27 side. In the chair 10 with armrests, the joints 26 facing each other on one side and the other side of the seat 11 are formed in an arbitrary manner.

The lower part of the armrest part 20 made of resin is formed as an opening 21 over the entire length of the armrest part 20, and the surface side of the armrest part 20 is shaved in a stepped manner on its one end side 20a. The other side 20b has a hook-like shape bent at about 80 degrees. Here, inside the opening 21, there are a plurality of contact folds 23 provided in parallel from one side 20a to the other side 20b, and the contact surface (engagement surface) 23a facing downward is The armrest portion 20 is formed as a circumferential surface that draws a semicircle from the one side surface 20c to the other side surface 20d. Further, in the vicinity of the bent portion on the inner side of the opening 21, there is a cylindrical protrusion 24 projecting downward, and a screw hole 25 is formed in the center of the protrusion 24.

In order to fix the armrest portion 20 having such a structure to the armrest attachment portion 17, the insertion portion 22 is inserted into the inside of the armrest holding portion 28, and the through hole 18 and the projection portion 24 are connected to each other. The armrest portion 20 is mounted so as to cover the armrest attachment portion 17 in position. Since the size of the protrusion 24 in the radial direction is set to be slightly smaller than the diameter of the through hole 18, the protrusion 24 is engaged with the through hole 18 in a fitted state. Since the screw hole 25 is formed at the center of the protrusion 24, the screw hole 25 and the through hole 18 are inevitably engaged with each other, and the fixing screw 19 is screwed into the screw hole 25. Here, in the armrest portion 20, the insertion portion 22 is inserted inside the armrest pressing portion 28, and the upper surface side of the insertion portion 22 and the lower surface side of the armrest pressing portion 28 are in contact with each other and are prevented from coming off. Since the fixing screw 19 is screwed into the screw hole 25 through the through hole 18, it is fixed to the armrest mounting portion 17 in a fitted state.

As described above, in the armchair 10 according to the present embodiment, the one end 20a is fixed to the armrest mounting portion 17 of the armrest portion 20 by the insertion portion 22 and the armrest holding portion 28 of the armrest portion 20. Since the structure does not require strict alignment due to the engagement of the one side 20a with the protrusion 24 on the other side 20b and the screw hole 25 and the through hole 18, the one end 20a cannot be fixed. There is no problem. Therefore, since it is not necessary to form the protrusion 24 (screw hole 25) and the through hole 18 with high positional accuracy, the manufacturing is easy and the yield is low. Further, since the armrest portion 20 can be fixed with the single fixing screw 19, the work of screwing the fixing screw 19 required for attaching the armrest portion 20 can be performed twice for each leg, so that the working efficiency is improved.

Further, an abutment surface 23a, which is an engagement surface of the abutment fold 23 of the armrest portion 20 with the armrest attachment portion 17, is formed as a circumferential surface, and the armrest attachment portion 17 made of a pipe is provided. Since the armrest part 20 is attached to the armrest mounting part 17 in surface contact with the outer peripheral shape, the armrest part 20 is more stable and easy to use when in use.

[0020]

[Effect of the device]

 As described above, in the armchair according to the present invention, one side of the fixing structure of the armrest part with respect to the armrest mounting part does not require strict alignment by engaging the insertion part and the armrest holding part. It is characterized by being Therefore, even if the other side of the fixing structure is misaligned due to the engagement between the screw hole (projection) and the through hole, there is no problem in fixing the one side. Since it does not need to be formed with high positional accuracy, it is easy to manufacture and has a low yield. In addition, since the armrest can be fixed with one fixing screw, the work of screwing the fixed screw required for mounting the armrest can be performed twice for each leg, thus improving work efficiency.

When a protrusion that can be inserted into the through hole is formed on the other side of the armrest, the armrest can be prevented from falling off while the armrest attachment is engaged with the armrest attachment. Therefore, it is easy to screw in the fixing screw. Further, since the stress applied to the armrest can be supported by the engaging portion between the projection and the through hole, and the stress applied to the fixing screw can be reduced, the fixing screw is hard to loosen.

In addition, in the case where the armrest portion has an opening on the lower side thereof, and the inner shape of the opening portion is formed in a shape conforming to the outer peripheral shape of the armrest mounting portion, for example, armrest mounting If the part has a cylindrical shape like a pipe and the inner shape of the opening is formed as a circumferential surface, the armrest part is mounted in surface contact with the armrest mounting part, so use The stability of the armrests is improved during use, making it easy to use.

[Brief description of drawings]

FIG. 1 is a perspective view showing a chair with an armrest according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a partially enlarged view of a fixing structure of an armrest portion in the armchair-equipped chair.

FIG. 3 is a perspective view showing an example of a conventional chair with an armrest.

4 is an explanatory view showing a partially enlarged structure for fixing an armrest portion in the armchair shown in FIG. 3. FIG.

[Explanation of symbols]

 10 ... Chair with armrest 11 ... Seat 12 ... Seat 13 ... Backrest 14 ... Shell 16 ... Leg 17 ... Armrest attachment 18 ... Through hole 19 ... Fixing screw 20 ... Armrest part 21 ... Opening part 22 ... Insert part 23 ... Abutment fold 24 ... Projection part 25 ... Screw hole 26 ... Joint 27. ..Mounting part 28 ... Armrest holding part

Claims (4)

[Scope of utility model registration request] 1. A chair with an armrest having an armrest mounting portion above the stool portion, and the armrest portion is fixed to the armrest mounting portion, wherein the armrest portion has an insertion portion on one end side thereof. And has a screw hole in an engaging portion with the armrest mounting portion on the other side while engaging with an armrest holding portion provided on one side of the armrest mounting portion, and is formed in the armrest mounting portion. A chair with an armrest, wherein the armrest portion is fixed by a fixing screw screwed through the through hole. 2. The armrest portion according to claim 1, wherein
The armchair with an armrest characterized in that the engaging portion with the armrest mounting portion on the other side has a protrusion that can be inserted into the through hole, and the screw hole is formed in this protrusion. 3. The armrest portion according to claim 1, wherein at least a lower side of the armrest portion is formed as an opening portion that is an engaging portion with the armrest attachment portion, and the armrest portion and the armrest attachment portion are formed. A chair with an armrest, wherein the chair is engaged in a fitted state. 4. The chair with armrests according to claim 3, wherein the opening portion has an engagement surface inside thereof that conforms to the outer peripheral shape of the armrest attachment portion.