JP3572827B2 - Chair seat plate structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat plate structure of a chair having a substantially horizontal seat portion and a body portion continuously rising behind and connected to a backrest portion, and more particularly, a cushion body is mounted on a front surface side. The present invention relates to a seat plate structure of a chair, in which the inner shell thus formed is fitted in an outer shell surrounding the outer shell in a superposed state.
[0002]
[Prior art]
Conventionally, various structures of a seat plate or a backrest plate of a chair in which an inner shell having a cushion body attached to the surface side is fitted in an outer shell that covers the outer shell in a superposed state have been provided. It is devised so that the outer shell and the inner shell can be easily and firmly fitted.
[0003]
This type of backrest plate or seat plate has an opening formed on one of the mating surfaces of the outer shell and the inner shell integrally formed of a synthetic resin, and an engagement claw engaged with the other in a locking manner. It has a protruding structure. In addition, since the outer shell and the inner shell are relatively large molded products, a large number of reinforcing ribs are formed vertically and horizontally on the fitting surface side to increase bending strength.
[0004]
However, if the positioning of the outer shell and the inner shell at the time of fitting is not accurate, there is a problem in the assembling process that the engagement between the opening and the engagement claw cannot be performed at many places at the same time. May be displaced along the fitting surface between the outer shell and the inner shell. Further, in the case of a structure in which a tubular bulging portion is provided on both sides of the outer shell and which includes an elastic joint for connecting the backrest so as to be able to tilt forward and backward, the bulging portion is formed at a position where the bulging portion is formed. Cannot provide the fitting means by the opening and the engaging claw, so that the fitting strength of this portion is weakened, and the inner shell is easily deformed in a direction in which the side portion of the inner shell is disengaged from the outer shell. Problems were also inherent.
[0005]
In particular, in a seat plate having a substantially horizontal seating portion and a body portion continuously rising behind and connecting to the backrest portion, the inner shell and the outer shell have substantially the same shape. Since the bulges are formed along both sides of the outer shell corresponding to the trunk, not only the structure of the molding die becomes complicated, such as adoption of a multi-split die, but also It becomes even more difficult to provide fitting means on both sides of the part.
[0006]
[Problems to be solved by the invention]
In view of the above situation, the present invention is directed to a seat plate having a substantially horizontal seating portion and a body portion having a body portion that stands up continuously behind the seat portion and is connected to the backrest portion. A chair that facilitates the positioning of the outer shell and the inner shell in the engagement operation of fitting the outer shell and the inner shell in a superposed state, does not cause a lateral displacement in the fitted state, and has a high fitting strength on both sides. In providing a seat plate structure.
[0007]
[Means for Solving the Problems]
For purposes of the present invention, the aforementioned problem solving, and a substantially horizontal seat, rising continuously at the back, in the seat plate structure of the chair shape having a body portion which connects the backrest part, the Lee N'nasheru A plurality of engaging claws protruding from one of the two shells on the mating surface side and a plurality of engaging claws being engaged with the other engaging outer cladding so as to be fitted to the outer shell covering the outer shell. Along with both sides of the outer shell corresponding to the body portion, a bulging portion for housing an elastic joint for connecting the backrest portion to be able to tilt back and forth is formed. An engaging rib extending in the direction of removal of the molding die is provided on both outer surfaces of the bulging portion, and the bulging portion extends along both sides of the inner shell corresponding to the body portion on the fitting surface side. A bent concave portion capable of holding the protrusion is formed, and a pulling direction of a molding die is formed on both inner surfaces of the bent concave portion. Projecting the engaging rib extending, chair formed by restricting the forward movement of the inner shell relative to the outer shell the engagement rib of the inner shell polymerization state of the two shells into contact with the trailing edge of the outer shell engagement ribs The seat plate structure was constructed.
[0008]
Here, all of the engaging claws and the reinforcing ribs provided on the fitting surface side of the inner shell and the outer shell are protruded in a direction in which the molding die is set within an angle formed by the seating portion and the body portion. Preferably. Further, a second engagement rib is provided in parallel behind the engagement rib of the outer shell, and when the outer shell and the inner shell are assembled, the second engagement rib is provided between the engagement rib and the second engagement rib of the outer shell. It is also preferable that the engagement rib of the inner shell is inserted.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a more detailed description will be given based on the embodiment of the present invention shown in the accompanying drawings. FIG. 1 is an overall perspective view of a chair according to the present invention, in which A indicates a leg, B indicates a seat, and C indicates a backrest. FIG. 2 shows a state in which the outer shell 2 and the inner shell 3 constituting the seat plate 1 are fitted together, FIG. 3 is an exploded perspective view showing a part of the main part thereof cut away, and FIG. FIG. 2 shows a cross-sectional view of a main part in a state. In the figure, reference numeral 4 denotes a cushion body.
[0010]
As shown in FIG. 1, the chair according to the present invention has a backrest on a seat B supported by a leg A via elastic joints C1 and C1 covered with bellows rising upward from both sides of the back. The part C is attached. The seat portion B is supported by the leg portion A via a seat receiver 5 having a built-in seat tilting mechanism attached to the lower surface of the seat plate 1 so that the rear portion can be tilted up and down around the front portion. I have. Further, the backrest portion C has a structure that can be tilted back and forth by an elastic joint tool C1.
[0011]
The seat plate 1 according to the present invention has a substantially horizontal seat portion 1A, and a body portion 1B that stands up continuously behind the seat portion 1A and is connected to the backrest portion C. The outer shell 2, the inner shell 3 and the cushion body 4 constituting the same are formed in the same shape.
[0012]
According to the present invention, in order to fit the inner shell 3 having the cushion body 4 attached to the front surface thereof to the outer shell 2 covering the outer shell 2 in a superposed state, a plurality of inner shells 3 are fitted to one of the two shells 2 and 3 to the fitting surface side. A plurality of openings 7,... Are formed on the other side so as to protrude with the engaging claw groups 6, and engage with the engaging claw groups 6, and the outer shell 2 corresponding to the body portion 1B has a fitting surface side. Are formed along the both sides of the swelling, and bulging portions 8 and 8 are provided on the both sides of the swelling portion 8 to accommodate the elastic joint C1 for connecting the backrest portion C so as to be able to tilt back and forth. The engagement ribs 9, 9 extending in the pulling-out direction are protrudingly provided, and the bends capable of holding the bulging portion 8 along both sides on the fitting surface side of the inner shell 3 corresponding to the body portion 1B. Concave portions 10 are formed, and engaging ribs 11 extending on the inner surfaces of both sides of the bent concave portion 10 in the pulling-out direction of the molding die are formed. And, it restricts the forward movement of the inner shell 3 with respect to the outer shell 2 abuts the engagement rib 11 of the inner shell 3 to the rear edge of the engaging rib 9 of the outer shell 2 in the polymerization state of the two shells 2, 3 The gist is that. Here, in FIG. 2, the arrow P indicates the direction in which the molding die is removed. Note that the bent concave portion 10 may hold a part of the bulging portion 8 or may hold substantially the entirety of the bulging portion 8. The engaging ribs 11 may be provided between the engaging ribs 9 and the second engaging ribs 9A in a state where the two shells 2 and 3 are overlapped.
[0013]
More specifically, as shown in FIGS. 4 and 6, the outer shell 2 is integrally formed of a synthetic resin, and has a grid-like shape on the upper surface of the seating portion 1A of the shell structure substrate 12 and the front surface of the body portion 1B. , A plurality of reinforcing ribs 13,... Protruding along the circumference thereof, and the engaging claws 6,. 14, and the above-mentioned bulging portions 8, 8 are integrally formed on both sides of the body 1B so as to protrude forward. Here, the bulging portion 8 is a tubular member that is open upward, and a lower portion of the elastic joint C1 is mounted inside the bulging portion 8, and a backrest portion C mounted on the upper portion of the elastic joint C1 is provided therein. It is intended to support it to be able to tilt forward and backward. Then, all the parts protruding from the shell structure substrate 12, such as the engaging claw groups 6, ..., the reinforcing ribs 13, ..., and the engaging ribs 9, 9A provided on the fitting surface side of the outer shell 2, are seated on the seat. Orientation is performed in the direction in which the molding die is set within the angle stretched between the portion 1A and the trunk portion 1B, that is, within the angle formed by the seating portion 1A and the trunk portion 1B, so that molding can be performed with the minimum number of dies. I have to.
[0014]
As shown in FIG. 7, the inner shell 3 is integrally formed of a synthetic resin, and has an opening along the periphery of the shell structure board 15 for receiving and engaging the engaging claw groups 6,. Are formed, and when they are fitted to the outer shell 2 in a superposed state, the back surface is supported by the reinforcing ribs 13 of the outer shell 2. The reinforcing ribs may also be formed in a lattice shape on the back surface side of the inner shell 3, and the reinforcing ribs may be brought into contact with the reinforcing ribs 13,... Of the outer shell 2. The bent concave portions 10 are formed on both sides of the body portion 1B of the shell structure substrate 15 so that the concave portions are on the back side. The engagement ribs 11, 11 provided on the inner surfaces on both sides of the bent concave portion 10 are oriented in the direction in which the molding die is set within an angle stretched between the seat portion 1A and the body portion 1B. Further, a large and small number of through holes 16,... Are formed in the shell structure substrate 15 of the inner shell 3, and when the inner shell 3 is arranged in a foaming mold, a cushion material made of urethane foam is foamed. A part of the cushion material automatically adhered to the front surface side of the shell structure substrate 15 goes around to the rear surface side through the through holes 16, and the inner shell 3 and the cushion material are more firmly integrated by the anchor effect, and This is covered with a skin sheet such as cloth or leather to form the cushion body 4.
[0015]
Then, the engaging rib 11 of the inner shell 3 is inserted into the rear of the engaging rib 9 of the outer shell 2 while the inner shell 3 having the cushion body 4 integrated with the outer shell 2 is placed on the outer shell 2. When the mating rib 11 is slidably guided along the engaging rib 9, the openings 7,... Receive the corresponding engaging claw groups 6,. At the same time, the bulging portions 8, 8 formed along both sides of the outer shell 2 corresponding to the body portion 1B on the fitting surface side are combined with the bulging portions 8, 8 on the fitting surface side of the inner shell 3 also corresponding to the body portion 1B. The bent concave portions 10, 10 formed along the both sides hold the body. In this fitting state, the engaging ribs 9 and 11 are oriented in the direction in which the molding die is set within an angle stretched between the seating portion 1A and the body portion 1B, and thus correspond to the body portion 1B. In this portion, the forward movement of the inner shell 3 with respect to the outer shell 2 is reliably restricted because the engagement rib 11 abuts on the rear edge of the engagement rib 9, and the upward movement is also oriented in the drawing direction of the molding die. Are restricted by the engagement between the engaging pawl groups 6,... And the openings 7,.
[0016]
When the second engaging ribs 9A are arranged in parallel behind the engaging ribs 9, when the outer shell 2 and the inner shell 3 are assembled, the second engaging ribs 9A are located between the engaging ribs 9 and 9A of the outer shell 2. By inserting the engagement rib 11 of the inner shell 3, the inner shell 3 can be more accurately guided and fitted to the outer shell 2, and the upward movement of the inner shell 3 with respect to the outer shell 2 is performed by the inner shell 3. The third engagement rib 11 is regulated by contacting the front edge of the engagement rib 9A of the outer shell 2.
[0017]
Further, the cross-sectional shape of the bulging portion 8 and the bent concave portion 10 perpendicular to the drawing direction of the molding die is not limited to a square as in the illustrated embodiment, and may be a curved shape. When the shell 2 and the inner shell 3 are fitted together, at least a part of the engagement rib 9 and a part of the engagement rib 11 need to be shaped to abut. Further, one of the engaging rib 9 and the engaging rib 11 may be a concave groove, but in the case of a concave groove, it is necessary to secure a sufficient thickness of a portion forming the concave groove. It is preferable to project the engagement rib as in the embodiment.
[0018]
Furthermore, the inclined surface 8A on the front side of the bulging portion 8 and the inclined surface 10A on the front side of the bent concave portion 10 along the direction in which the molding die is pulled out, when the outer shell 2 and the inner shell 3 are fitted. If the dimensions are set so as to be joined, it is possible to obtain a fitting state in which the inner shell 3 does not rattle further by reliably restricting the upward movement of the inner shell 3 with respect to the outer shell 2 and to increase the fitting strength.
[0019]
The means for fitting the group of engaging claws 6 and the opening 7 is not limited to the illustrated embodiment, but may be any suitable structure as long as the structure allows one-touch locking.
[0020]
【The invention's effect】
According to the seat plate structure of the chair of the present invention described above, in the engagement operation of fitting the outer shell and the inner shell in a superposed state, the engagement rib provided on the bulging portion of the outer shell bends the inner shell. Since the engagement rib provided in the concave portion is slid and guided, the positioning of the outer shell and the inner shell is facilitated so that the engagement claw group and the opening are accurately fitted, and the outer shell is positioned with respect to the outer shell in the fitted state. As a result, the inner shell does not shift up, down, left and right, the fitting strength at both sides can be increased, and furthermore, it is possible to restrict the body from being curved and deformed in the direction in which the sides of the inner shell are separated from each other.
[0021]
Further, all of the engaging claws and the reinforcing ribs provided on the fitting surface side of the inner shell and the outer shell are protrudingly provided in a direction in which the molding die is set within an angle formed by the seating portion and the body portion. With this configuration, even if the seat plate has a substantially horizontal seating portion and a body portion having a body portion continuously rising behind and connected to the backrest portion, the structure of the molding die is simplified, and Therefore, the number of mold dies is reduced, which contributes to cost reduction. Also, with respect to the separation force of the inner shell with respect to the outer shell, the fitting strength is only weak in the pulling direction of the molding die, but in normal use conditions, the separation force is not applied in this direction, and in practical use, The fitting strength without any problem can be obtained. Further, a second engagement rib is provided in parallel behind the engagement rib of the outer shell, and when the outer shell and the inner shell are assembled, the second engagement rib is provided between the engagement rib and the second engagement rib of the outer shell. By inserting the engagement ribs of the inner shell, the inner shell can be more accurately guided and fitted to the outer shell, and the upward movement of the inner shell with respect to the outer shell can be performed by the engagement of the inner shell. The engagement rib can be regulated by abutting on the front edge of the second engagement rib of the outer shell.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a chair according to the present invention.
FIG. 2 is an abbreviated exploded sectional view showing a state where an outer shell and an inner shell are fitted to each other.
FIG. 3 is an exploded perspective view showing a main part of the present invention in a partially broken manner.
FIG. 4 is a partial cross-sectional view of a main part in the fitted state.
FIG. 5 is a cutaway perspective view of an outer shell.
FIG. 6 is a plan view of the right half of the outer shell.
FIG. 7 is a partial plan view of a seating portion of the inner shell.
8A and 8B show a relationship between an engagement claw group and an opening in a fitting state of the outer shell and the inner shell, wherein FIG. 8A is a cross-sectional view taken along line X1-X1 of FIG. 7, and FIG. FIG. 8C is a sectional view taken along line X3-X3 of FIG. 7, and FIG. 9D is a sectional view taken along line X4-X4 of FIG.
[Explanation of symbols]
A Leg B Seat C Backrest C1 Elastic joint 1 Seat 1A Seat 1B Body 2 Outer shell 3 Inner shell 4 Cushion 5 Seat receiver 6 Engagement claw group 7 Opening 8 Swelling 8A Slope REFERENCE SIGNS LIST 9 engaging rib 9A second engaging rib 10 bent concave portion 10A inclined surface 11 engaging rib 12 shell structure substrate 13 reinforcing rib 14 recess 15 shell structure substrate 16 through hole

Claims (3)

And a substantially horizontal seat, rising continuously at the back, in the seat plate structure of the chair shape having a body portion which connects the backrest part, the Lee N'nasheru under polymerization conditions in the outer shell covering the outside it A plurality of engaging claws are provided on one of the shells so as to protrude toward the fitting surface, and a plurality of openings for engaging with the engaging claws are formed on one of the shells. Along the both sides on the fitting surface side of the outer shell to be formed, there is formed a bulging portion for housing an elastic joint for connecting the backrest so as to be able to tilt forward and backward, and a molding metal is formed on both outer surfaces of the bulging portion. Forming a bent concave portion capable of holding the bulging portion along both sides on the fitting surface side of the inner shell corresponding to the body portion while projecting the engaging rib extending in the die removing direction. Engaging ribs extending in the direction in which the molding die is removed are protruded from inner surfaces of both sides of the bent concave portion, Seat plate structure of the chair, characterized by comprising regulating the forward movement of the inner shell relative to the outer shell the engagement rib of the inner shell in a polymerized state contact the rear edge of the engaging rib of the outer shell. All of the engaging claws and the reinforcing ribs provided on the fitting surface side of the inner shell and the outer shell are protruded in a direction in which the molding die is set within an angle formed by the seating portion and the body portion. The seat plate structure of the chair according to claim 1. A second engagement rib is arranged in parallel behind the engagement rib of the outer shell, and the inner shell is provided between the engagement rib and the second engagement rib of the outer shell when the outer shell and the inner shell are assembled. 2. A chair seat plate structure according to claim 1, wherein said engaging rib of a shell is inserted.

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