JP4281536B2 - Load sensor and load sensor placement jig - Google Patents

Description

  The present invention relates to a load sensor for detecting a load acting on a seat cushion by a seat-like load sensor and an arrangement jig for arranging the load sensor in the seat cushion.

  Conventionally, a seat with a load sensor having a structure shown in FIG. 12 is provided in which a recess is formed below (for example, the lower surface) of the seat cushion on which the seat is formed, and a load sensor is disposed in the recess using a slab. Is known (for example, Patent Document 1 and Patent Document 2).

The sheet having the above configuration has the following configuration. That is, a recess 2b that opens downward with respect to the seat cushion 2 under the seat skin 4 is formed, and a slab (part of the seat cushion) 3 made of the same material as the seat cushion 2 is disposed in the recess 2b. The method of fixing the load sensor 10 to the upper surface 3a of the slab 3 is taken. When the load sensor is fixed on the slab, a double-sided tape is applied to one side of the load sensor so that the position does not change on the slab, and the load sensor 10 is fixed to the upper surface 3a of the slab. The way to do is taken.
Japanese Patent Laid-Open No. 11-34710 (first page, FIG. 1) Japanese Patent Laid-Open No. 10-211836 (first page, FIG. 1)

  However, in the configuration in which the concave portion is formed in the seat cushion and the load sensor is fixed on the slab, when the load sensor is fixed to the slab, a method of fixing the load sensor using a double-sided tape or the like is used. In this method, the release paper on one side of the double-sided tape is first peeled off, and then the double-sided tape is attached to one side of the load sensor. After that, the release paper of the double-sided tape on the other side must be peeled off and affixed on the slab. Therefore, in the method of attaching and fixing the load sensor using the double-sided tape, the number of assembling steps increases.

  Further, since it is necessary to separate the slab from the seat cushion or to make it separately, the number of parts of the seat cushion increases in order to dispose the load sensor.

  Therefore, the present invention has been made in view of the above-described problems, and it is a load sensor that can be easily assembled to the seat cushion, and the arrangement treatment in which the load sensor can be easily disposed in the seat cushion. It is an object to provide a tool and to provide a load sensor that can suppress an increase in the number of parts.

  The first means taken in order to solve the above-described problem is that a load sensor is disposed in the seat cushion, and in the seat-like load sensor for detecting a load acting on the seat, a slit is formed in the seat cushion. The load sensor is inserted into the slit by a placement jig and disposed.

  When the load sensor is inserted into the slit, it is preferable that the load sensor has a guide portion guided by an arrangement jig.

  Moreover, the guide part is good to be a hole or a protrusion shape.

  The second means taken in order to solve the above-described problem is a placement jig in which a sheet-like load sensor for detecting a load acting on the seat is disposed in a slit formed in the seat cushion. An engagement portion that engages with the guide portion is provided for a load sensor having a guide portion, and the load sensor is disposed in the slit in a state where the engagement portion and the guide portion are engaged. This is a configuration to be installed.

  In this case, the arrangement jig is rod-shaped, and the arrangement sensor may be inserted into the guide portion at the engaging portion to guide the load sensor.

  Further, the placement jig is flat, and the load sensor and the load sensor may be hooked by uneven engagement to guide the load sensor into the slit.

  Furthermore, it is preferable that the arrangement jig can be divided at the engaging portion.

  According to the first aspect of the present invention, if a sheet-like load sensor is inserted into the slit by the arrangement jig with respect to the slit formed in the seat cushion, the load sensor is Even in the form of a sheet, the load sensor can be reliably inserted into the slit by the arrangement jig. This is a load sensor that can be easily assembled to the seat cushion because the load sensor may be inserted by a placement jig.

  According to the second aspect of the present invention, when the load sensor is inserted into the slit, the guide part of the placement jig is guided by the placement jig. Can be arranged in the slit. In this case, if the guide portion is configured to be provided at the tip of the load sensor, the tip of the load sensor can be reliably guided by the placement jig, and the load sensor can be arranged at a desired position in the seat cushion.

  According to the third aspect of the present invention, when the guide portion has a hole or a protrusion shape, the placement jig is inserted into a hole provided at the tip of the load sensor for guidance, or the load sensor protrusion is disposed. The load sensor can be easily arranged simply by guiding with a jig.

  According to the invention of claim 4, with respect to the load sensor having the guide portion, the engagement portion that engages with the guide portion is provided, and the load sensor is slit while the engagement portion and the guide portion are engaged. If it is disposed within the load sensor, the load sensor can be assembled using a disposition jig for guiding the guide portion of the load sensor with the engaging portion, and the load sensor can be easily disposed in the slit. According to this, since it becomes unnecessary to divide the portion where the slab is disposed in the seat cushion as in the conventional case, the number of parts of the seat cushion in the assembly of the load sensor can be reduced as compared with the conventional case. .

  According to the invention of claim 5, if the arrangement jig is a rod, the arrangement jig is inserted into a guide portion formed on the load sensor, and the load sensor is guided by the arrangement jig having a simple shape. can do.

  According to the invention of claim 6, if the placement jig is planar, the placement jig and the load sensor are hooked by uneven engagement, and the load sensor is slit using the planar placement jig. It can be reliably guided in a stable state.

  According to the seventh aspect of the present invention, if the disposing jig can be divided with respect to the engaging portion, the disposing jig is used to dispose the load sensor at a desired position with respect to the slit. The installation jig can be divided in the slit, and only the installation jig can be taken out from the slit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The seat 1 with a load sensor shown in the present embodiment is used, for example, as a vehicle seat, and means a seat cushion 2 that receives a load of a seated person and in which a load sensor 10 is disposed. . The seat cushion 2 constituting the load sensor-equipped seat 1 is made of polyurethane foam, and the seat surface is covered with a skin 4 made of a material such as nylon, polyester, leather, etc., as shown in the schematic diagram of FIG. ing.

  As shown in FIG. 5, the seat cushion 2 in the present embodiment is formed with slits 2c and 2d in two directions on the rear side of the seating surface. The slit 2c is formed on the xy plane that is the width direction of the sheet, and the slit 2d is formed orthogonal to the slit 2c on the yz plane and slightly upwardly protruding from the slit 2c. . The thickness of the slit 2c in the z direction is larger than the thickness of the load sensor 10 (plate thickness direction in FIG. 2) to be described later, and the lateral width in the x direction is larger than the width of the load sensor 10 in the x direction. Further, the depth of the slit 2c in the seat cushion in the y direction is such that the tip of the connector 15 is substantially the same as the outer shape of the seat cushion as shown in FIG. It is deep enough to fit the body.

  Next, the load sensor 10 will be described with reference to FIG. The load sensor 10 detects the load of a seated person sitting on the seat, an object (for example, a luggage) placed on the seat cushion, or detects whether the seated person is seated on the seating surface. Is what you do. The load sensor 10 has a thin sheet shape, and is made by interposing insulating spacers 21 made of polyethylene terephthalate between the films 11a and 11b from both sides, and has flexibility. The load sensor 10 includes a plurality of sensor units 12 that detect a load, and the plurality of sensor units 12 are formed in a ring shape. A signal (load signal) detected by each sensor unit 12 can be taken out by a connector 15 provided in a direction opposite to the sensor unit 12.

  In FIG. 1, four sensor parts 12 are provided on the film, and the cross-sectional shape of the sensor part 12 is shown in FIG. The sensor unit 12 is provided at a place where it is desired to detect whether or not a load acts on the seat cushion 2 on the seat cushion, and the load acting on the seat cushion depending on the contact state of the pair of sensor electrodes 16 and 17. Can be detected. The opposing sensor electrodes 16 and 17 are integrally provided on the films 11a and 11b on the inner sides of the films 11a and 11b having the shape shown in FIG. 1, and a space is formed between the opposing sensor electrodes 16 and 17. ing. This space may be filled with pressure-sensitive ink for detecting pressure as necessary. On the other hand, a spacer 21 is provided on the side surface of the space of the sensor unit 12, and the spacer 21 is provided at a position other than the sensor unit. The spacer 21 prevents the sensor electrodes 16 and 17 from contacting each other when a load in the vertical direction (z direction) is not applied to the load sensor 10 (specifically, the sensor electrodes 16 and 17). It has a function. In the load sensor 10 having such a configuration, the signal detected by the sensor unit 12 can be taken out from the connector 15. In this case, the load signal detected by each of the sensor units 12 is taken out. Alternatively, a signal obtained by contacting at least one sensor electrode of the plurality of sensor units 12 may be extracted.

  Further, in the load sensor 10 shown in FIG. 1, a hole 9 penetrating the films 11a and 11b as shown in FIG. 3 is formed at the tip of the main body having a plurality of sensor parts 12. The hole 9 is a slit formed in the seat cushion 2 by inserting the tip of the mounting jig 30 made of metal having a rod-like rigidity when the load sensor 10 is disposed at a desired position in the seat cushion. A function as a guide hole that allows the load sensor 10 to be easily disposed in the slit 2c by inserting the placement jig 30 while guiding the placement jig 30 along the slit 2d extending in the y direction. Have The diameter of the guide hole 9 having such a function is substantially the same as the tip of the insertion jig 30 to be inserted, and the arrangement jig 30 is advanced along the slit 2d extending in the y direction. The hole diameter is set so as not to be removed in the process. FIG. 5 shows the state of the arrangement, and FIG. 7 shows the state after the load sensor 10 is arranged in the seat cushion. The arrangement jig 30 is arranged in a state in which the load sensor 10 is arranged at a desired position of the seat cushion 2 by pulling the load sensor 10 at a desired position in the slit and then pulling it below the slit 2d. By extracting only 30 from the guide hole 9, the load sensor 10 can be easily disposed in the seat cushion. According to the above-described method, in order to fix the load sensor 10, it is not necessary to fix the load sensor 10 with a double-sided tape or the like, which eliminates the need to peel off the release paper of the double-sided tape. The number of assembling steps for assembling the seat cushion 2 can be reduced. In addition, the seat cushion 2 can be provided with respect to the seat cushion 2 without being divided so as to dispose the slab.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. The second embodiment is characterized in that the load sensor 10 shown in FIG. 1 is arranged at a desired position in the seat cushion by using an arrangement jig 31 made of a flat metal plate. In this case, in the first embodiment, the slit 2d extending in the yz direction shown in FIG. 5 is not required, and in the second embodiment, a thin rectangular parallelepiped slit formed slightly larger than the outer shape of the load sensor 10 is used. Only 2c may be formed on the seat cushion 2.

  For assembling the load sensor 10 to the seat cushion 2, the seat-shaped load sensor 10 is placed on a flat placement jig 31. In this state, if the placement jig 31 is gradually pushed in and inserted into the slit 2c in the y direction, the load sensor 10 can be easily placed in the seat cushion using the simple placement jig 31. Can be disposed at a desired position.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG. The third embodiment is a modification of the second embodiment shown in FIG. This third embodiment differs from the second embodiment described above in that a seat cushion 2 having a slit shape similar to that in FIG. 5 is used, and a jig insertion hole (an engagement portion with the load sensor 10). ) 38 is formed at a position corresponding to the guide hole 9, and the assembly of the load sensor 10 is performed using an installation jig 37 having an L-shaped operation portion 34 in which the connector side is L-shaped and the sensor side is planar. It is possible to attach.

  Regarding the assembly of the load sensor 10 to the seat cushion 2, the sheet-like load sensor 10 is first placed on the placement jig 37. In this state, the placement jig 37 and the guide hole 9 of the load sensor 10 are aligned, and the jig insertion hole 38 and the load sensor 10 are directed from the bottom to the top of the placement jig 32 as shown in FIG. The tip of the placement jig 32 is inserted into the guide hole 9. In this state, the load sensor 10 is pushed into the slit 2c of the seat cushion 2 by the operation unit 34, thereby being inserted into the seat cushion. In this case, if the placement jig 31 is gradually pushed in the y direction along the slit 2d, the load sensor 10 can be easily placed in the seat cushion using the simple placement jig 31. . After disposing the load sensor 10 at a desired position, the disposing jig 37 is pulled out on the side opposite to the insertion direction, and the disposing member 32 is pulled out downward. In this case, the jig insertion hole 38 formed in the arrangement member 37 may have a notch at the tip in the y direction.

(Fourth embodiment)
A fourth embodiment is shown in FIG. In FIG. 9 showing the above-described third embodiment, the jig insertion hole 38 is formed in the arrangement jig 37. However, in the fourth embodiment, as shown in FIG. A U-shaped notch 35 (which becomes an engagement portion with the load sensor 10) is provided. On the other hand, the load sensor 10 placed on the placement jig 33 is a protrusion that protrudes in the orthogonal direction of the films 11a and 11b from at least one surface of the films 11a and 11b of the load sensor 10 instead of the guide hole 9 described above. The point that 20 is formed is different from the above-described embodiment.

  Regarding the assembly of the load sensor 10 to the seat cushion 2, the sheet-shaped load sensor 10 is first placed on the placement jig 33. In this state, the protrusion 20 of the load sensor 10 is hooked into the notch 35 (engagement portion with the load sensor 10) of the placement jig 33 to engage with the projections and recesses, and the load sensor 10 with respect to the placement jig 33. The load sensor 10 is inserted into the slit 2c of the seat cushion 2 together with the arrangement jig 33. In this case, if the arrangement jig 33 is gradually pushed in the y direction along the slit 2c, the load sensor 10 is hooked and arranged at a desired position in the seat cushion using the simple arrangement jig 31. can do. After the load sensor 10 is arranged at a desired position, the protrusion 20 of the load sensor 10 is detached from the notch 35 by pulling out the arrangement jig 37 on the opposite side to the insertion direction, and the load sensor 10 is placed in the seat cushion. 10 is disposed.

(Fifth embodiment)
A fifth embodiment is shown in FIG. The fifth embodiment is characterized in that the arrangement jig 33 shown in FIG. 10 is divided into left and right. The disposing jig 33 shown in the fifth embodiment uses disposing jigs 33a and 33b that can be divided into left and right at the position where the protrusion 20 of the load sensor 10 is provided. By using the disposing jigs 33a and 33b that can be divided into left and right, after disposing the load sensor 10 in the seat cushion, the disposing jig 33 is divided into left and right in the x direction and engaged with the protrusion 20 If the rear ends 34a and 34b are pulled out in a state in which is released, only the load sensor 10 is left in the seat cushion, and only the placement jigs 33a and 33b can be easily taken out from the slit 2c.

It is the top view which showed the shape of the load sensor in 1st Embodiment of this invention. It is AA sectional drawing of the load sensor shown in FIG. It is BB sectional drawing of the load sensor shown in FIG. FIG. 2 is an explanatory diagram of a state in which an arrangement jig is attached to a guide portion at the tip of the load sensor shown in FIG. 1. It is a state explanatory drawing which shows the state which arrange | positions the load sensor shown in FIG. 4 in a seat cushion with an installation jig. It is sectional drawing of the y direction of the seat cushion which has arrange | positioned the load sensor shown in FIG. 1 in the seat cushion. It is sectional drawing of the x direction of the seat cushion which has arrange | positioned the load sensor shown in FIG. 1 in the seat cushion. It is state explanatory drawing which shows the state which arrange | positions the load sensor shown in FIG. 1 in a seat cushion using the arrangement | positioning jig | tool in 2nd Embodiment. It is sectional drawing of a seat cushion which shows the state which has arrange | positioned the load sensor shown in FIG. 1 in a seat cushion using the arrangement | positioning jig | tool in 3rd Embodiment. It is a perspective view which shows the relationship between the load sensor and arrangement | positioning jig | tool in 4th Embodiment. It is a perspective view which shows the relationship between the load sensor and arrangement | positioning jig | tool in 5th Embodiment. It is the conventional figure which has arrange | positioned the load sensor to the recessed part of a seat cushion. It is the prior art figure which showed the load sensor on the slab arrange | positioned in the recessed part of the seat cushion shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat with load sensor 2 Seat cushion 2c X direction slit 2d Y direction slit 9 Guide hole (guide part)
DESCRIPTION OF SYMBOLS 10 Load sensor 12 Sensor part 20 Protrusion part 30, 31, 33, 37 Arrangement jig 33a, 33b Arrangement jig 35, 36a, 36b Engagement part

Claims (7)

In the seat-shaped load sensor that arranges the load sensor in the seat cushion and detects the load acting on the seat,
A load sensor, wherein a slit is formed in the seat cushion, and the load sensor is inserted into the slit by an installation jig. The load sensor according to claim 1, further comprising a guide portion guided by the placement jig when the load sensor is inserted into the slit. The load sensor according to claim 2, wherein the guide portion is a hole or a protrusion. In an arrangement jig in which a sheet-shaped load sensor for detecting a load acting on the seat is disposed in a slit formed in the seat cushion,
An engagement portion that engages with the guide portion is provided for a load sensor having a guide portion, and the load sensor is disposed in the slit in a state where the engagement portion and the guide portion are engaged. An arrangement jig for a load sensor. The load sensor disposing jig according to claim 4, wherein the disposing jig is rod-shaped, and the disposing jig is inserted into the guide portion by the engaging portion to guide the load sensor. The said disposition jig | tool is planar shape, The said disengagement jig and the said load sensor are hooked in the said engaging part by uneven | corrugated engagement, The said load sensor is guided in the said slit. Load sensor placement jig. The load sensor disposition jig according to claim 6, wherein the disposition jig can be divided by the engaging portion.

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