sorption canister

Abstract

The present invention relates to a sorption can, and prevents erroneous cutting of a sorption can housing at the time of recirculation of the sorption can. A sorption can (10) is provided with: a sorption can housing (11) formed by attaching a cover (30) that closes an opening on the other side to a housing main body (20) that is in a cylindrical shape and has an opening on one side closed; a sorption material (13) filled in the sorption can housing; a holding plate (14) provided in the housing main body in a manner that is movable in a surface direction and holds the sorption material; and a spring (16) interposed between the cover and the holding plate and exerts a force on the holding plate in a direction that presses the sorption material. The cover has a link portion (33) that is in a cylindrical shape and is cuttable in a direction orthogonal to an axis, between a support plate portion (31) that supports the spring and an engagement portion (32) that engages with a flange portion (20a) of the housing main body. A discrimination portion (26) that indicates a cut area (R) of the link portion is provided on an outer peripheral surface of the housing main body.

Description

Technical Field

[0001] The technology disclosed in this specification relates to adsorption tanks. Background Technology

[0002] Conventionally, for example, the adsorption tank described in Patent Document 1 includes: an adsorption tank shell, which is formed by attaching a cover to a cylindrical shell body that has an opening on one side closed, and an adsorption material that fills the adsorption tank shell and adsorbs and desorbs evaporated fuel; a retaining plate that is provided within the shell body in a manner that allows it to move in the planar direction and holds the adsorption material; and a spring that is located between the cover and the retaining plate and applies force to the retaining plate in the direction of pressing the adsorption material. The cover has a cylindrical connecting portion between the support plate portion that supports the spring and the joint portion that engages with the open end of the shell body.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2006-233962 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] During the recirculation of the adsorption tank, it is considered to remove the adsorbent material, retaining plate, spring, and other internal components by cutting the adsorption tank shell along a direction orthogonal to the axis. In this case, it is desirable to cut the adsorption tank shell at an appropriate cutting position, i.e., at the joint that traverses the cover. This allows an opening at the cover-side end of the shell body without damaging the internal components, making it easy to remove them. However, since the joint is covered by the shell body, it is possible to incorrectly cut the adsorption tank shell at a position other than the appropriate cutting position. For example, cutting the spring would cause its cut pieces and burrs to scatter, thus worsening the recirculation performance of the adsorption tank.

[0008] The problem to be solved by the technology disclosed in this specification is to prevent the adsorption tank shell from being accidentally cut off during the recirculation of the adsorption tank.

[0009] Solution for solving the problem

[0010] To solve the above problems, the technology disclosed in this specification adopts the following technical solution.

[0011] The first technical solution is an adsorption tank, comprising: an adsorption tank shell, which is formed by attaching a cover to a cylindrical shell body with an opening on one side closed, and an adsorption material filled inside the adsorption tank shell, which adsorbs and desorbs evaporated fuel; a retaining plate, which is disposed inside the shell body in a manner that allows it to move in a planar direction and holds the adsorption material; and a spring, which is located between the cover and the retaining plate and applies force to the retaining plate in a direction that presses the adsorption material, wherein the cover has a cylindrical connecting portion that can be cut in a direction orthogonal to the axis between a support plate portion supporting the spring and a joint portion that engages with the opening end of the shell body, and wherein a discrimination portion indicating the cut area of ​​the connecting portion is provided on the outer peripheral surface of the shell body.

[0012] According to the first technical solution, a discrimination portion provided on the outer peripheral surface of the housing body indicates the cutting area of ​​the connecting portion. Therefore, by cutting the adsorption tank housing in a direction orthogonal to the axis in the cutting area, erroneous cutting of the adsorption tank housing during the recirculation of the adsorption tank can be prevented. Consequently, by removing the support plate portion, an opening can be made at the cover-side end of the housing body without damaging the adsorption material, retaining plate, spring, or other internal components, thus allowing easy removal of the internal components. Furthermore, the recirculation performance of the adsorption tank can be improved.

[0013] The second technical solution is based on the adsorption tank of the first technical solution, wherein the discrimination part is a convex or concave part representing the boundary of the cut area.

[0014] According to the second technical solution, the boundary of the cut area can be represented by the convex or concave portion that serves as the discrimination part.

[0015] The third technical solution is based on the adsorption tank of the first technical solution, wherein the discrimination part has a surface roughness different from the surface roughness outside the cutting area.

[0016] According to the third technical solution, the cut area can be represented by a discrimination unit having a surface roughness different from that of the surface roughness outside the cut area.

[0017] The fourth technical solution is an adsorption tank based on the second or third technical solution, wherein the discrimination part is formed continuously or intermittently in the circumferential direction of the shell body.

[0018] According to the fourth technical solution, the cutting area can be represented by a discrimination part that is continuously or intermittently formed along the circumferential direction on the outer peripheral surface of the shell body.

[0019] The effects of the invention

[0020] According to the technology disclosed in this specification, it is possible to prevent erroneous cutting of the adsorption tank shell during the recirculation of the adsorption tank. Attached Figure Description

[0021] Figure 1 This is a front view showing a partial cross-section of the adsorption tank of Embodiment 1.

[0022] Figure 2 This is a magnified front view of a portion of the adsorption tank.

[0023] Figure 3 This is a front view of the adsorption tank in Embodiment 2.

[0024] Figure 4 This is a magnified front view of a portion of the adsorption tank.

[0025] Explanation of reference numerals in the attached figures

[0026] 10. Adsorption tank; 11. Adsorption tank shell; 13. Adsorption material; 14. Holding plate; 16. Spring; 20. Shell body; 20a. Flange (open end); 26. Discrimination part (protrusion); 30. Cover; 31. Support plate; 32. Joint; 33. Connecting part; 126. Discrimination part; R. Cut-off area. Detailed Implementation

[0027] Hereinafter, embodiments for implementing the technology disclosed in this specification will be described using the accompanying drawings.

[0028] [Implementation Method 1]

[0029] Figure 1 This is a front view showing a partial section of the adsorption tank. Figure 2 A magnified front view of a portion of the adsorption vessel. For clarity, the structure of the main parts is described after outlining the general structure of the adsorption vessel. Furthermore, regarding the adsorption vessel, [the following is a description of the structure of the main parts]. Figure 1 Define the up, down, left, and right sides based on the state. Figure 1 In Chinese, the front and back directions of the paper are defined as the front and back directions.

[0030] (Overview of the adsorption tank)

[0031] like Figure 1 As shown, the adsorption tank 10 has a resin adsorption tank shell 11. The adsorption tank shell 11 is formed by attaching a cover 30 to a shell body 20 that is rectangular and has an opening on one side (top) closed, which closes the opening on the other side (bottom). The left-right dimension of the shell body 20 is larger than the front-back dimension.

[0032] A box opening 22, a purge port 23, and an atmospheric port 24, arranged in a left-right direction, are provided on the upper surface of the housing body 20. The housing body 20 has a partition wall 25 that divides the hollow portion into left and right adsorption chambers. The left adsorption chamber communicates with the box opening 22 and the purge port 23, and the right adsorption chamber communicates with the atmospheric port 24. A gap is formed between the partition wall 25 and the cover 30, connecting the adsorption chambers to each other. The box opening 22 communicates with the upper air chamber of the vehicle's fuel tank. The purge port 23 communicates with the intake passage of the internal combustion engine. The atmospheric port 24 is open to the atmosphere.

[0033] Each adsorption chamber is filled with adsorbent material 13, which adsorbs and desorbs the evaporated fuel generated in the fuel tank. The adsorbent material 13 is, for example, granular activated carbon. At the opening of each adsorption chamber, a breathable retaining plate 14 is provided, movable horizontally in the surface direction (vertical direction). The retaining plate 14 holds the adsorbent material 13. A breathable sheet filter 15 is overlapped on the upper surface of the retaining plate 14. A spring 16 is provided between the retaining plate 14 and the cover 30. The spring 16 is a helical spring that applies force to the retaining plate 14 in the direction of pressing the adsorbent material 13 (vertical direction).

[0034] (Installation structure of the main body 20 and the cover 30)

[0035] An annular flange 20a protruding radially outward is formed at the lower end of the housing body 20. The cover 30 has a support plate 31, a joining portion 32, and a connecting portion 33. The support plate 31 is formed into a rectangular plate shape and supports two springs 16 on the left and right sides. The joining portion 32 is joined to the flange 20a of the housing body 20 by vibration welding or the like. The connecting portion 33 is cylindrical and can be cut off in a direction orthogonal to the axis (radial). An annular gap is formed between the housing body 20 and the connecting portion 33 to avoid contact during vibration welding. The cover 30 has a plurality of reinforcing ribs 34 protruding to the lower surface of the support plate 31. The reinforcing ribs 34 are continuous with the connecting portion 33 and / or intersecting reinforcing ribs 34. The flange 20a corresponds to the "open end" as referred to in this specification.

[0036] During the recirculation of the adsorption tank 10, in order to easily remove the internal components such as the adsorption material 13, the holding plate 14, and the spring 16 without damaging them, it is considered to cut the adsorption tank shell 11 at an appropriate cutting position, namely, at the position that crosses the connecting portion 33 of the cover 30. However, in the past, since there was no discrimination part indicating the appropriate cutting position of the adsorption tank shell 11, it was possible to cut the adsorption tank shell 11 incorrectly. This embodiment has the following feature structure to prevent the incorrect cutting of the adsorption tank shell 11.

[0037] (Features of Implementation Method 1)

[0038] A discrimination portion 26 is provided on the outer peripheral surface of the housing body 20 to indicate the cutting area R of the connecting portion 33 of the cover 30. The cutting area R is the area that bypasses the flange portion 20a of the housing body 20 and crosses the connecting portion 33 of the cover 30. The discrimination portion 26 is a straight protrusion 26 indicating the boundary of the cutting area R (labeled with the same reference numerals as the discrimination portion) (see reference numerals). Figure 2 The area between the protrusion 26 and the flange 20a of the housing body 20 corresponds to the cut-off region R. The protrusion 26 is continuously formed in the circumferential direction of the housing body 20.

[0039] (Advantages of the characteristic structure of Implementation Method 1)

[0040] According to this embodiment, the cutting area R of the connecting portion 33 is indicated by a discrimination portion, i.e., a protrusion 26, provided on the outer peripheral surface of the housing body 20. Therefore, by cutting the adsorption tank housing 11 in the cutting area R along a direction orthogonal to the axis, it is possible to prevent accidental cutting of the adsorption tank housing 11 during the recirculation of the adsorption tank 10. As a result, by removing the support plate portion 31, an opening can be made at the cover-side end of the housing body 20 without damaging the adsorption material 13, the holding plate 14, the spring 16, and other internal components, thus allowing for easy removal of the internal components without damage. Furthermore, the recirculation performance of the adsorption tank 10 can be improved.

[0041] Furthermore, the boundary of the cut-off region R can be represented by the protrusion 26, which serves as the discrimination part 26.

[0042] Furthermore, the cut-off region R can be represented by the protrusion 26 continuously formed circumferentially on the outer peripheral surface of the housing body 20.

[0043] Alternatively, the protrusion 26 serving as the discrimination part 26 can be replaced with a groove-shaped recess. The protrusion 26 can also be formed intermittently along the circumferential direction on the outer peripheral surface of the housing body 20.

[0044] [Implementation Method 2]

[0045] This embodiment modifies the discrimination unit 26 of Embodiment 1. Therefore, this modified part will be described. The same reference numerals are used for the parts that are the same as those in Embodiment 1, and repeated descriptions are omitted. Figure 3 This is a front view of the adsorption tank 10. Figure 4 This is a magnified front view of a portion of the adsorption tank 10.

[0046] like Figure 3 and Figure 4As shown, the discrimination section 126 of this embodiment has a surface roughness different from the surface roughness of the surface of areas other than the cutting region R. Specifically, the discrimination section 126 has a surface roughness greater than the surface roughness of areas other than the cutting region R, i.e., fine unevenness. The discrimination section 126 is continuously formed in the circumferential direction of the housing body 20. The discrimination section 126 can be formed simultaneously with the resin molding of the housing body 20, or it can be formed through surface treatment.

[0047] (Advantages of Implementation Method 2)

[0048] Using this embodiment, the same function and effect as in embodiment 1 can also be obtained.

[0049] Furthermore, the cutting region R can be represented by the discrimination unit 126, which has a surface roughness different from that of the cut region R.

[0050] Furthermore, the cutting region R can be represented by the discrimination portion 126 continuously formed along the circumferential direction on the outer peripheral surface of the housing body 20.

[0051] Furthermore, the discrimination section 126 may also have a surface roughness smaller than that of the surface roughness outside the cutting region R. Additionally, the discrimination section 126 may be formed intermittently along the circumferential direction on the outer peripheral surface of the housing body 20.

[0052] [Other Implementation Methods]

[0053] The technology disclosed in this specification is not limited to the aforementioned embodiments and can be implemented in various other ways. For example, the cutting area R can be set to a region suitable for cutting based on the shape of the housing body 20 and the cover 30. For example, if the housing body 20 does not have a flange 20a, the region that crosses the connecting portion 33 of the cover 30 can also be set as the cutting area R.

Claims

1. An adsorption tank, comprising: The adsorption tank shell is formed by attaching a cover that closes the opening on the other side to a cylindrical shell body with an opening on one side closed. An adsorbent material is filled inside the shell of the adsorption tank and adsorbs and desorbs the evaporated fuel. A retaining plate, which is disposed within the housing body in a manner movable in the planar direction, and retains the adsorbent material; and A spring, located between the cover and the retaining plate, applies a force to the retaining plate in the direction of pressing the absorbent material. The cover has a cylindrical connecting portion that can be cut off in a direction orthogonal to the axis between the support plate portion supporting the spring and the joint portion engaging with the open end of the housing body. A discrimination section indicating the cutting area of ​​the connecting part is provided on the outer peripheral surface of the housing body.

2. The adsorption tank according to claim 1, wherein, The discrimination part is a convex or concave portion that represents the boundary of the cut area.

3. The adsorption tank according to claim 1, wherein, The discrimination unit has a surface roughness that is different from the surface roughness outside the cut-off region.

4. The adsorption tank according to claim 2 or 3, wherein, The discrimination section is formed continuously or intermittently in the circumferential direction of the shell body.

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