Headrest and service car

Abstract

To provide a headrest and a service car which can protect the occipital region of a user favorably and can easily restrain cost of manufacture.SOLUTION: A headrest is provided with a cushion part 11 which abuts on the occipital region of a user, is formed with a cavity part inside the cushion part 11, and is formed with a swollen part 15 which swells toward the occipital region of the user on a central part of an opposite surface 12 of the cushion part 11 which is a surface opposed to the occipital region of the user.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a headrest and a work vehicle. [Background technology]

[0002] Patent Document 1 describes a headrest for a work vehicle. This headrest is provided in the driver's seat of the work vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-94130 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 does not provide a detailed description of the structure of the headrest. For example, the headrest described in Patent Document 1 may be configured such that urethane foam is wrapped in a PVC (Polyvinyl Chloride) film and a plate material such as oriented strand board is provided on the rear surface as support. With this configuration, when the back of the user's head hits the headrest, the urethane foam can absorb the impact, thereby protecting the back of the user's head.

[0005] However, in such a configuration, the number of components in the headrest (the number of types of components that make up the headrest) tends to be relatively large, which tends to increase manufacturing costs.

[0006] An object of the present invention is to provide a headrest and a work vehicle that can adequately protect the back of the user's head and that can be manufactured at low cost. [Means for solving the problem]

[0007] The headrest according to the present invention is characterized in that it comprises a cushion portion that abuts against the back of the user's head, a hollow portion formed inside the cushion portion, and a bulge portion that bulges out toward the back of the user's head in the center of the opposing surface of the cushion portion that faces the back of the user's head.

[0008] According to this configuration, the air in the cavity tends to provide the cushion with adequate cushioning properties. Furthermore, when the back of the user's head contacts the headrest, the back of the head contacts the bulging portion. This makes it easier to prevent the user from feeling pain in the back of the head when the back of the head contacts the headrest, compared to when, for example, the center of the opposing surface is recessed away from the back of the user's head. Therefore, according to this configuration, the back of the user's head can be protected in an optimal manner.

[0009] Furthermore, this configuration tends to reduce the number of components in the headrest compared to a configuration in which, for example, urethane foam is wrapped in a PVC film and a board such as oriented strand board is provided on the rear surface as support, which helps to reduce manufacturing costs.

[0010] As described above, this configuration makes it possible to realize a headrest that can adequately protect the back of the user's head and that can be manufactured at low cost.

[0011] Furthermore, in the present invention, it is preferable that at least one recess is formed in the opposing surface, the recess being recessed in a direction away from the back of the user's head and adjacent to the bulging portion.

[0012] This configuration allows the back of the user's head to come into contact with the recess when the back of the user's head is displaced from the bulge, for example, due to the user's body tilting to the left or right. When the back of the user's head comes into contact with the recess, the user can sense through the sensation at the back of the head that the back of the user's head is no longer in its normal position. This makes it easier for the user to maintain the back of the head in its normal position.

[0013] Furthermore, in the present invention, it is preferable that the cushion portion includes a support member that abuts against the back surface of the cushion portion, which is the surface opposite to the opposing surface, and supports the cushion portion, and a fixing device that penetrates the cushion portion and fixes the cushion portion to the support member, and that the fixing device is attached to the recess.

[0014] With this configuration, the cushion portion is more likely to be stably fixed to the support member than when the fixing device is attached so as to penetrate a portion other than the recess (for example, a bulge), and the cushion portion is thereby stably supported by the support member.

[0015] Furthermore, in the present invention, it is preferable that a protrusion that protrudes in a direction away from the back of the user's head is formed on the back surface, a hole that communicates with the hollow portion is formed in the protrusion, and the support member abuts against the protrusion while blocking the hole.

[0016] When the cushion portion is manufactured by blow molding, a cavity can be easily formed inside the cushion portion, but in this case, holes as air holes, which are essential for blow molding, are formed in the cushion portion.

[0017] According to this configuration, the hole is effectively blocked by the support member, thereby preventing air from leaking out of the cavity through the hole.

[0018] A feature of the work vehicle according to the present invention is that it is provided with the headrest described above.

[0019] The headrest described above can provide suitable protection for the back of the user's head while also making it easy to keep manufacturing costs down. Therefore, with this configuration, it is possible to realize a work vehicle that can provide suitable protection for the back of the user's head while also making it easy to keep manufacturing costs down. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. [Figure 2] FIG. 2 is a longitudinal sectional front view showing the configuration of the driving section. [Figure 3] FIG. 2 is a left side view in vertical section showing the configuration of a headrest and the like. [Figure 4] FIG. 2 is a front view showing the configuration of a headrest and the like. [Figure 5] FIG. 2 is a rear view showing the configuration of the headrest and the like. [Figure 6] FIG. 2 is a cross-sectional plan view showing the configuration of a headrest and the like. [Figure 7] FIG. 4 is a rear view showing the configuration of the cushion portion. [Figure 8] FIG. 2 is a left side view in vertical section showing the configuration of a headrest and the like. DETAILED DESCRIPTION OF THE INVENTION

[0021] An embodiment of the present invention will be described with reference to the drawings. In the following description, unless otherwise specified, the direction of arrow F in the drawings will be referred to as "front," the direction of arrow B as "rear," the direction of arrow L as "left," and the direction of arrow R as "right." Furthermore, the direction of arrow U in the drawings will be referred to as "up," and the direction of arrow D as "down."

[0022] [Overall configuration of the work vehicle] The work vehicle 1 shown in Figure 1 is a multipurpose vehicle (utility vehicle). As shown in Figure 1, the work vehicle 1 is equipped with a body frame 2, left and right front wheels 3, and left and right rear wheels 4. The body frame 2, left and right front wheels 3, and left and right rear wheels 4 are provided under the body (body) of the work vehicle 1.

[0023] A driving section 5 is provided in the center of the work vehicle 1 in the longitudinal direction. As shown in Figures 1 and 2, the driving section 5 has a riding space 6. A user G (passenger) (see Figure 3) can ride in the riding space 6.

[0024] A loading platform 9 is provided behind the driver's section 5. Loads of transported goods (such as straw and agricultural products) can be loaded onto the loading platform 9. An engine E is provided below the loading platform 9. The left and right front wheels 3 and the left and right rear wheels 4 are driven by power from the engine E. The work vehicle 1 travels by driving the left and right front wheels 3 and the left and right rear wheels 4.

[0025] As shown in Figure 1, the riding space 6 is provided with a steering wheel 7 and a seat 8. A user G can steer the work vehicle 1 by operating the steering wheel 7 while sitting in the seat 8.

[0026] As shown in Fig. 2, in this embodiment, two seats 8 are provided. However, the present invention is not limited to this. Any number of seats 8 may be provided.

[0027] [Headrest] As shown in Figures 1 and 2, two headrests 10 are provided in the passenger space 6. That is, the work vehicle 1 is equipped with two headrests 10. However, the present invention is not limited to this. Any number of headrests 10 may be provided.

[0028] Each headrest 10 is disposed above the seat 8. As shown in Fig. 3, each headrest 10 is disposed behind the head of a user G who is sitting in the seat 8 facing forward. Each headrest 10 has the same structure.

[0029] [Cushion part] As shown in Fig. 3, the headrest 10 includes a cushion portion 11 that comes into contact with the back of the head G1 of the user G. Although not particularly limited, the cushion portion 11 may be made of an elastic material (for example, an elastomer material). As shown in Figs. 4 and 5, the cushion portion 11 has an opposing surface 12 and a back surface 13.

[0030] The facing surface 12 is a surface of the cushion part 11 that faces the back of the head G1 of the user G. In this embodiment, the facing surface 12 is a front side surface of the cushion part 11.

[0031] The back surface 13 is the surface of the cushion part 11 opposite to the opposing surface 12. In this embodiment, the back surface 13 is the rear side surface of the cushion part 11.

[0032] As shown in Fig. 6, a hollow portion 14 is formed inside the cushion portion 11. The hollow portion 14 is a space filled with air. Note that "air" in this specification is not limited to air in the strict sense (a mixed gas of nitrogen, oxygen, etc.), but may be any gas.

[0033] 4 and 6, a bulge 15 is formed on the opposing surface 12. The bulge 15 is formed in the center in the left-right direction of the opposing surface 12. The bulge 15 is also formed in the center in the up-down direction of the opposing surface 12. That is, the bulge 15 is formed in a portion of the opposing surface 12 that is the center in the up-down direction and the center in the left-right direction.

[0034] The bulging portion 15 bulges forward. In other words, the bulging portion 15 bulges toward the back of the head G1 of the user G. Note that "bulging" here means that the bulging portion 15 bulges more than the portion of the opposing surface 12 that is located furthest to the back (the side farthest from the back of the head G1 of the user G) (i.e., the recessed bottom portion 16a, described below). However, "bulging" may also mean that the bulging portion 15 bulges more than the surrounding area (adjacent areas).

[0035] That is, in the cushion portion 11, a bulging portion 15 bulging toward the back of the head G1 of the user G is formed in the center of the facing surface 12, which is the surface facing the back of the head G1 of the user G.

[0036] 4 and 6, at least one recess 16 is formed in the opposing surface 12. More specifically, two recesses 16, one on the left and one on the right, are formed in the opposing surface 12. However, the present invention is not limited to this. The number of recesses 16 may be any number.

[0037] Each recess 16 is recessed toward the rear side. In other words, each recess 16 is recessed in a direction away from the back of the head G1 of the user G.

[0038] Each recess 16 is adjacent to a bulge 15. More specifically, the left recess 16 is adjacent to the left side of the bulge 15. The right recess 16 is adjacent to the right side of the bulge 15.

[0039] However, the present invention is not limited to this. For example, the recess 16 may be adjacent to the upper side or the lower side of the bulge 15.

[0040] That is, each recess 16 is recessed in a direction away from the back of the head G1 of the user G and is adjacent to the bulging portion 15.

[0041] [Supporting Members and Fixtures] 5 and 6, the headrest 10 includes a support member 17. Although not particularly limited, the support member 17 is a plate-shaped member made of metal. The support member 17 abuts against the back surface 13.

[0042] A frame-shaped raised portion 21 is formed on the peripheral edge of the back surface 13. The raised portion 21 has a shape that follows the outer shape of the support member 17. The raised portion 21 guides the position and posture of the support member 17.

[0043] 4 and 6, the headrest 10 is provided with two fixing devices 18, one on the left and one on the right. Each fixing device 18 penetrates the cushion portion 11 and the support member 17 in the front-rear direction. As a result, each fixing device 18 fixes the cushion portion 11 to the support member 17. Then, by fixing the cushion portion 11 to the support member 17, the cushion portion 11 is supported by the support member 17.

[0044] However, the present invention is not limited to this, and any number of fixing devices 18 may be provided.

[0045] In this way, the headrest 10 is in contact with the back surface 13 of the cushion portion 11, which is the surface opposite to the opposing surface 12, and is provided with a support member 17 that supports the cushion portion 11. The headrest 10 also has a fixing device 18 that penetrates the cushion portion 11 and fixes the cushion portion 11 to the support member 17.

[0046] In this embodiment, the fasteners 18 are rivets, but the present invention is not limited to this, and the fasteners 18 may be bolts or the like.

[0047] The attachment of the fixing device 18 will be described in detail. As shown in Figs. 6 and 7, a first hole 11a and a second hole 11b are formed in the cushion part 11. The first hole 11a is formed in the recessed bottom part 16a of the left recess 16. The second hole 11b is formed in the recessed bottom part 16a of the right recess 16. The recessed bottom part 16a is the part of the recess 16 that is located at the rearmost side (the side farthest from the occipital region G1 of the user G). In other words, the recessed bottom part 16a is the bottom part of the recess 16.

[0048] 5 and 6, left and right through-holes 17a are formed in the support member 17. The left through-hole 17a is provided at a position communicating with the first hole 11a, and the right through-hole 17a is provided at a position communicating with the second hole 11b.

[0049] 6, the left fastener 18 passes through the first hole 11a and the left through-hole 17a. The left fastener 18 fastens the left recessed bottom 16a to the support member 17.

[0050] The right-side fastener 18 passes through the second hole 11b and the right through-hole 17a. The right-side recessed bottom 16a is fastened to the support member 17 by the right-side fastener 18.

[0051] With the configuration described above, the fixture 18 is attached to the recess 16. As shown in Fig. 7, the first hole 11a is a circular hole, whereas the second hole 11b is an elongated hole extending in the left-right direction.

[0052] As shown in Figures 6 and 8, a support stay 30 is fixed to the rear surface of the support member 17, for example, by welding. Furthermore, as shown in Figures 2 and 3, a support frame 31 is provided on the work vehicle 1 behind the seat 8. The support frame 31 is provided at the rear end of the driver's section 5 and extends in the vertical direction. The support stay 30 is fixed to the support frame 31, for example, by bolting.

[0053] With this configuration, the cushion portion 11 is supported by the support frame 31 via the support member 17 and the support stay 30. The headrest 10 is also supported by the support frame 31 via the support stay 30.

[0054] [Protrusions and holes] 6 and 7, a protrusion 19 is formed in a portion of the back surface 13 of the cushion part 11 that is the center in the up-down direction and the center in the left-right direction. The protrusion 19 protrudes further rearward than the surrounding area of ​​the protrusion 19. In other words, the protrusion 19 protrudes in a direction away from the back of the head G1 of the user G than the surrounding area of ​​the protrusion 19.

[0055] That is, a protrusion 19 that protrudes in a direction away from the back face G1 of the user G is formed on the back surface 13.

[0056] Holes 20 are formed in the protruding portion 19. The holes 20 are in communication with the hollow portion 14. That is, the holes 20 that are in communication with the hollow portion 14 are formed in the protruding portion 19. Note that, although not particularly limited, the holes 20 may be air holes that are formed in conjunction with the blow molding of the cushion portion 11.

[0057] 6 and 8, the support member 17 is in contact with the protrusion 19 in a state where it closes the hole 20. As a result, the hole 20 is closed by the front side surface of the support member 17.

[0058] When the cushion portion 11 is fixed to the support member 17 by the fasteners 18, the support member 17 is pressed against the protruding portion 19 from the rear side, as shown in the enlarged view of FIG. 6 . Then, as the support member 17 is pressed forward (or the cushion portion 11 is pressed backward), the protruding portion 19 and its surrounding area are slightly deformed, and the support member 17 and the protruding portion 19 press against each other in the front-to-rear direction. In this state, as the support member 17 is fixed by the fasteners 18, the state in which the support member 17 presses the protruding portion 19 forward is maintained. As a result, the hole 20 is stably blocked by the support member 17.

[0059] According to the configuration described above, the air in the cavity 14 tends to provide the cushion portion 11 with appropriate cushioning properties. Furthermore, when the back of the head G1 of the user G abuts against the headrest 10, the back of the head G1 abuts against the bulging portion 15. This makes it easier to prevent the user G from feeling pain in the back of the head G1 when the back of the head G1 of the user G abuts against the headrest 10, compared to, for example, a case in which the center of the opposing surface 12 is recessed in a direction away from the back of the head G1 of the user G. Therefore, according to the configuration described above, the back of the head G1 of the user G can be suitably protected.

[0060] Furthermore, the configuration described above tends to reduce the number of components in the headrest 10 compared to a configuration in which, for example, urethane foam is wrapped in a PVC film and a plate material such as oriented strand board is provided on the rear surface as support, which makes it easier to keep manufacturing costs down.

[0061] As described above, this configuration makes it possible to realize a headrest 10 that can adequately protect the back of the head G1 of the user G and that can be manufactured at low cost.

[0062] Other Embodiments (1) The recess 16 does not have to be formed on the opposing surface 12.

[0063] (2) The fixing device 18 may be attached to a portion of the cushion portion 11 other than the recessed portion 16 .

[0064] (3) The protrusion 19 does not have to be formed on the rear surface 13 .

[0065] (4) The holes 20 may be formed in the rear surface 13 at locations other than the protrusions 19 .

[0066] (5) The work vehicle 1 may be any type of work vehicle, such as a tractor, rice transplanter, or combine harvester.

[0067] (6) The headrest 10 may be provided on something other than the work vehicle 1. For example, the headrest 10 may be provided on a passenger vehicle, a ship, an airplane, furniture (for example, a chair), etc. that is not used for work.

[0068] (7) The arrangement of some or all of the components may be reversed left to right or front to back.

[0069] The configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments, unless a contradiction arises. Furthermore, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these, and can be modified as appropriate within the scope of the purpose of the present invention. [Industrial Applicability]

[0070] The present invention can be used in headrests and work vehicles. [Explanation of symbols]

[0071] 1: Work vehicle 10: Headrest 11: Cushion part 12: Opposite surface 13: Back 14: Cavity part 15:bulge 16: Recess 17: Support member 18: Fixture 19: Protrusion 20: Hole G: User G1: Back of head

Claims

1. It has a cushion part that contacts the back of the user's head, A hollow portion is formed inside the cushion portion, A headrest in which a bulging portion that bulges out toward the back of the user's head is formed in the center of a facing surface of the cushion portion that faces the back of the user's head.

2. At least one recess is formed in the opposing surface, The headrest according to claim 1 , wherein the recess is recessed in a direction away from the rear of the user's head and is adjacent to the bulge.

3. a support member that abuts against a back surface of the cushion portion, which is the surface opposite to the opposing surface, and supports the cushion portion; a fastener that penetrates the cushion portion and fixes the cushion portion to the support member, The headrest according to claim 2 , wherein the fastener is attached to the recess.

4. a protrusion that protrudes in a direction away from the back of the user's head is formed on the back surface, a hole communicating with the cavity is formed in the protrusion, The headrest according to claim 3 , wherein the support member abuts against the protrusion in a state where the support member covers the hole.

5. A work vehicle equipped with the headrest according to any one of claims 1 to 4.

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