JP4662373B2 - Pull-out dishwasher - Google Patents

Description

  The present invention relates to a drawer-type dishwasher, and more particularly to a lid opening / closing operation mechanism. There is a packing on the lower surface of the lid body, and the lid body is moved up and down in conjunction with the operation of putting in and out of the washing tank. For dishwashers that are opened and closed, the tightening force on the lid is prevented from becoming excessive and too small due to errors in assembly of the lid to the washing tank, deterioration of the packing, etc., and insufficient tightening force Therefore, it is possible to prevent the sealing failure of the packing from occurring.

In a drawer-type dishwasher, the washing tub is supported by the outer box, that is, the left and right rails provided on the bottom of the washing machine body, so that the washing tub can be freely inserted and removed. There is one that is supported by a box, and the packing of the lid contacts the upper edge surface of the cleaning tank to seal between the lid and the cleaning tank.
As the lid support mechanism, four parallel links (front, rear, left and right) are used as the lid support mechanism, and the lid body is urged forward by a coil spring (opening spring). There is one that pushes the flange at the rear end of the body, pushes the lid backward against the tension coil spring, and moves the lid downward by the parallel link to close the lid (see FIG. 15 of Japanese Patent No. 3789775).

In addition, the center of the wire spring (opening spring) is attached to the main body of the washing machine, the lid is supported at both front and rear ends, the inclined cam on the outer surface of the washing tank and the cam roller on the outer part of the lid, In the pushing operation, the inclined cam and the cam roller act, and this cam action causes the lid to be pulled down against the wire spring (Japanese Patent No. 3789775).
The main points of the latter configuration are as shown in FIGS. 8, 9, and 10. There are left and right rails R at the bottom of the washing machine body 201, and the washing tank 202 is supported by the rails R so as to be freely inserted and removed. ing.

The central portion of the wire spring 204 is locked to the side wall surface of the cleaning machine body 201, and the lid 203 is supported by the front and rear ends 204 a and 204 a of the wire spring 204.
The cleaning machine main body 201 has a guide roller 201a, the support plate 205 provided on the left and right sides of the lid body 203 has a longitudinal slot 205a, and the guide roller 201a is fitted in the longitudinal slot 205a. The elevator operation 203 is guided.
Inclined cams 211 are provided on the front, rear, left and right of the cleaning tank 202, and cam rollers 231 facing the cams 231 are provided on the front and rear of the left and right support plates 205 of the lid 203.
When the cleaning tank 202 is pushed in, the cam roller 231 comes into contact with the inclined cam surface 211a of the inclined cam 211 and is pushed down at the final stage of the pushing operation. As a result, the lid 203 is pulled down, the packing p comes into contact with the upper edge surface of the cleaning tank 202, and the cleaning tank is closed.

In the background art, the packing p is fixed to the lower surface of the lid, and when the lid is closed, the packing p abuts on the upper edge surface of the cleaning tank to seal between the upper edge surface of the lid and the cleaning tank. However, if the position of the packing p in the left-right direction with respect to the upper surface of the cleaning tank 202 is shifted, the sealing performance is lowered and water leakage occurs.
The cleaning tank 202 is supported on the bottom surface of the cleaning machine main body 201 by the rail R, and the lid 203 is supported on the cleaning machine main body by a parallel link, a wire spring, or the like, so that the cleaning machine main body 201 of the cleaning tank is supported. Due to the assembly error in the left and right direction and the assembly error of the lid to the washing machine body, a lateral displacement occurs between the lid and the washing tank, and the washing machine body is deformed due to inadequate handling during transportation and installation, etc. The displacement in the left-right direction also occurs due to the deformation of the cleaning tank.

[Prior art 1]
By the way, the invention for the purpose of preventing the displacement of the lid with respect to the cleaning tank in the left-right direction is known, and an example thereof is described in Japanese Patent No. 3275858. This known example is provided with a centering mechanism (position adjustment mechanism) in the left-right direction with respect to the washing machine main body of the washing tank, and the centering mechanism works by the pushing operation of the washing tank. Direction alignment is performed. However, this is to adjust the lateral displacement of the lid relative to the cleaning tank by adjusting the lateral displacement of the cleaning tank relative to the cleaning body. Since there is no function to directly adjust the displacement, as a practical matter, the lateral displacement of the washing tank relative to the washing machine main body is not eliminated, and therefore the accuracy of alignment of the lid with respect to the washing tank is reduced. Inevitable.

[Prior art 2]
Also, for the purpose of preventing the horizontal displacement between the lid and the cleaning tank, it is equipped with a centering mechanism (position adjustment mechanism) in the horizontal direction with respect to the cleaning tank of the lid, It is also known that the centering mechanism works to align the lid in the left-right direction with respect to the cleaning tank (Japanese Patent Nos. 3417352 and 3417353). Since this adjusts the horizontal position of the lid with respect to the cleaning tank directly, the positioning accuracy of the lid with respect to the cleaning tank is high. An example of this prior art is shown in FIGS.

  This prior art 2 is of a type in which a lid 103 having a packing on its lower surface is supported on the washing machine main body 101 by a parallel link 104. Then, when the cleaning tank 102 is pushed in, the flange 103a projecting downward from the lid body 103 is pushed by the pressing portion 102a at the rear end to cause the lid body 103 to recede against the return spring 103s. A centering mechanism is provided for the dishwasher that is pulled down by the parallel link 104 while retracting 103. This prior art centering mechanism is provided with first guides 102 b at the left and right ends in front of the cleaning tank 102, and second guides 103 b at the left and right ends in front of the lid 103. Is pushed in, the first guide 102b comes into contact with the second guide 103b of the lid 103 from the inside, and the lid 103 is moved in the left-right direction (the direction in which the displacement is adjusted) by the amount displaced in the left-right direction. Push it back to adjust the horizontal position relative to the washing tank (center ring). Then, near the end of the pushing operation of the cleaning tank, the pressing portion 102a comes into contact with and presses the flange 103a, and the lid 103 is pulled down and closed.

  The above is the outline of the prior art 2. In this prior art 2, the first guide 102b and the second guide 103b come into contact with each other and rub against each other even during the closing operation after the centering, and before the closing of the pushing operation of the cleaning tank. The frictional force between the first guide 102b and the second guide 103b acts until the lid is closed. And when the shift | offset | difference of the left-right direction with respect to the washing tank of a cover body is large, the said friction force becomes a big resistance with respect to pushing operation of a washing tank, and the smoothness of pushing operation will be impaired.

  By the way, if the cleaning tank is pushed down using a parallel link or inclined cam to close the lid, the closing operation continues until the washing tank is pushed in, and the tightening force on the lid of the washing tank increases. To do. The final compression amount of the packing varies greatly depending on the accuracy of assembly of the lid to the cleaning tank, so that the final tightening force varies greatly, and if the tightening force is insufficient due to an assembly error, a seal failure will occur. This causes water leakage from the washing tank. On the other hand, if the tightening force is excessive, the packing will be strongly squeezed due to strong drag and damaged early, resulting in water leakage from the cleaning tank. This also causes a problem that the resistance to the pushing operation of the cleaning tank is remarkably increased.

Moreover, in the said prior art 1 and the prior art 2, since the washing tank is completely sealed with the cover body in the state fully pushed in, when the washing tank returns a little forward, the said sealing with respect to a washing tank is inadequate. Become. In order to prevent this, the cleaning tank is generally locked in a state where it is completely pushed in (Japanese Patent Laid-Open No. 2001-61749). If this is not done, the lid will be incomplete and a sealing failure will occur as described above. In addition, there are manual and automatic locking mechanisms. In either case, a special locking mechanism is required for this purpose, and it is confirmed that the locking operation has been performed reliably. In order to do this, a special lock state confirmation mechanism is required.
Japanese Patent No. 3789775 Japanese Patent No. 3275858 Japanese Patent No. 3417352 Japanese Patent No. 3417353 JP 2001-61749 A

  The present invention is based on the prior art in which the lid body is pulled down and closed using a cam mechanism using an inclined cam and a cam roller, and the assembly error of the lid body to the main body of the washing machine, the cleaning of the inclined cam mechanism by the inclined cam and the cam roller, Regardless of various assembly errors such as assembly to the tank or lid (hereinafter referred to as "inclination cam mechanism assembly error"), packing deterioration, etc., the tightening force on the lid should be too large or too small. The purpose is to prevent it reliably, and the problems are as "Problem 1" and "Problem 2" below.

[Problem 1]
Problem 1 is to devise a cam mechanism using an inclined cam and a cam roller so that an excessive tightening force is not applied while avoiding an insufficient tightening force on the lid.

[Problem 2]
Furthermore, in addition to the above-mentioned problem 1, the problem 2 is to devise the cam mechanism so that the lid opening / closing operation mechanism has a locking means for locking the cleaning tank in the fully pushed-in position.

  The solution to the problem 1 is the following solution 1, and the solution to the problem 2 is the next solution 2.

[Solution 1]
The solution 1 is such that the washing tank is supported so as to be freely inserted into and removed from the washing machine main body via a rail, and a lid body having a packing on the lower surface is supported so as to be movable up and down by the washing machine main body. Based on the following (a), (b), and (c) on the premise of a pull-out dishwasher that is designed to lower and close the lid against the opening spring by the cam action of the inclined cam and cam roller. Is.
(A) The tilt cam is a swing arm that swings in the vertical direction, and its front end is pivotally supported on the side wall of the washing tank by a support shaft,
(B) There is a downward inclined cam surface on the lower surface of the rear portion of the inclined cam,
(C) The inclined cam is urged downward by the cam spring and is pressed against the stopper with a predetermined preload of the cam spring and held in a predetermined position.

The “preload” is a spring force applied in advance by the cam spring being elastically deformed in advance.
It should be noted that the rear left and right inclined cams of the cleaning tank may be made of a swing arm, and the front and rear left and right inclined cams may be made of a swing arm. If it is made like the latter, since the tightening force acts uniformly on the entire lid body, it is possible to prevent an excessive tightening force from acting on the entire lid body.

  When the cleaning tank is pushed in and the cam roller comes into contact with the inclined cam, the inclined cam is held at a predetermined position by the preload, so the cam roller is pushed down on the cam surface, and the lid body resists the opening spring. Be lowered. When the packing of the lid is pressed against the upper surface of the cleaning tank and is compressed, the resistance against pulling down of the lid increases as the compression amount increases, and exceeds the preload of the cam spring (see “ a ”position). Then, since the cam spring is elastically deformed and the inclined cam swings upward about the support shaft at the front end, the cam roller is hardly pushed down further. Therefore, the tightening force on the lid hardly increases (see FIG. 5. In this example, the increase in the spring force is finally expected to be 1.6 kgf). Therefore, the tightening force on the lid is reliably suppressed within a predetermined range and does not become excessive.

  The tilt cam is a swing arm that is pivotally supported by the front part of the support shaft. Since the tilt cam surface is provided on the lower surface of the rear part, the vertical swing stroke of the tilt cam surface can be increased with a simple support mechanism. Even if the tilting cam surface has a large vertical swing stroke, the tightening force on the lid is regulated by the preload of the cam spring, so this will not be excessive. The swing stroke can be made sufficiently large. As a result, the necessary cam stroke of the cam roller can be ensured regardless of assembly errors, packing deterioration, and the like. Further, the tightening force on the lid is not excessively reduced due to assembly errors, packing deterioration, and the like.

  As described above, the tightening force on the lid body is limited to a strength substantially equal to the preload w of the cam spring, and on the other hand, the vertical swinging stroke of the inclined cam surface can be made sufficiently large. There is no shortage of the amount, and therefore, it is reliably prevented that the tightening force is insufficient on the lid body due to the insufficient amount of the cam roller being pushed down.

[Embodiment 1]
Embodiment 1 is that the dishwasher in Solution 1 includes a centering mechanism in the left-right direction with respect to the washing tank of the lid.
The above matter relates to the premise in the solution means 1. And when the centering mechanism in the left-right direction with respect to the washing tank of the lid works, the lid is strongly pushed in the left-right direction against the washing tank in a state where the packing is pressed against the washing tank, thus receiving an excessive tightening force. And the durability of the packing is likely to be impaired. However, according to the above solution 1, since the tightening force of the lid is substantially suppressed within the preload range (predetermined range) of the cam spring, the effect of protecting the packing from the excessive tightening force is more remarkable. is there.
The centering mechanism includes a convex portion and a concave portion that are provided so as to fit into the lid and the cleaning tank, and a cam formed by the convex portion and the concave portion (or may be a concave portion and a convex portion). The left and right position of the lid is adjusted by the action.

  Although it is most effective to provide the cam mechanism according to the present invention in combination with the centering mechanism, this is not necessarily the case. When the centering mechanism is provided on the left and right of the rear, the left and right inclined cams may be used as swing arms, but the front left and right inclined cams may be used as swing arms. The same applies to the case where the centering mechanism is provided on the left and right of the front and rear.

[Embodiment 2]
Embodiment 2 of the solution 1 is that the cam spring is a torsion coil spring, and the cam spring biases the inclined cam downward and presses it against the stopper.
The torsion coil spring is compactly assembled in a narrow space with respect to the tilt cam, and is optimal as a biasing means for the tilt cam that swings in the vertical direction.

[Solution 2]
Means 2 for solving the above-mentioned problem 2 is that in the above-mentioned solution means 1, there is a recess in the lower surface of the central portion of the swing cam, and the cam roller is detachably engaged with this recess.

  When the cleaning tank is pushed in and the cam roller comes into contact with the inclined cam surface of the inclined cam, the cam roller is then pushed down by the inclined cam surface, and the clamping force on the lid body is a preload of the cam spring (preload w in FIG. 5). If it exceeds the upper limit, the inclined cam is pushed up by the cam roller against the cam spring. When the cleaning tank is completely pushed into the main body of the cleaning machine, the inclined cam surface passes through the cam roller, and the cam roller is fitted into and engaged with the concave portion on the lower surface of the central portion of the inclined cam.

On the other hand, the cam roller is provided on a support fixed to the lid, the inclined cam is connected to the side wall of the cleaning tank via a support shaft, and the lid is back and forth with respect to the main body of the cleaner by a guide roller. It is connected to. Accordingly, when the cleaning tank is completely pushed into the cleaning machine body, the cleaning tank is held in that state via the cam roller, the inclined cam, the lid, and the guide roller.
Therefore, special locking means for the cleaning tank by the lock lever can be omitted, and the locking means for the cleaning tank can be simplified.

The washing tank is supported by the washing machine body through the rail so that it can be inserted and removed freely. A lid with packing on the lower surface is supported by the washing machine body so that it can be raised and lowered. About the drawer-type dishwasher designed to lower and close the lid against the opening spring by the cam action of the cam mechanism,
The tilt cam is a swing arm pivotally supported on the front end by a support shaft. A tilt cam surface is provided on the lower surface of the rear portion of the tilt cam, and the cam is biased downward by a cam spring. By holding the inclined cam at a predetermined position by the preload of the spring, the tightening force on the lid is suppressed to a range substantially equal to the preload of the cam spring. In addition, since the tightening force on the lid body is suppressed to a range approximately equal to the preload of the cam spring, the vertical swing stroke of the inclined cam surface can be increased without fear of excessive tightening force. And by increasing the vertical swing stroke of the inclined cam surface, it is possible to increase the lift amount of the inclined cam surface excessively. The required tightening force can be ensured.

  In addition, by providing a recess in the lower surface of the central portion of the tilt cam by the swing arm, the cam roller and the tilt cam are detachably engaged when the washing tub is completely pushed into the dishwasher. The washing tank is locked. Therefore, special locking means such as a lock lever can be omitted.

  When the cleaning tank is pulled forward, the inclined cam is pushed up against the cam spring and disengages from the cam roller, and the cleaning tank is easily pulled out. When no special locking means is provided for the cleaning tank, it is not necessary to perform the unlocking operation, and therefore the operation of inserting and removing the cleaning tank is simple.

   Next, embodiments will be described with reference to the drawings. This embodiment is a pull-out dishwasher in which the lid is opened and closed by an inclined cam, and is provided in a pull-out dishwasher provided with a centering mechanism (horizontal position adjustment mechanism) for the lid washing tank. This is a specific example to which the above solution 1 and solution 2 are applied.

The first embodiment is shown in FIGS. 1 to 3, and the washing tank 2 is supported on the washing machine body 1 by a rail R (see rail R in FIG. 8) so as to be freely inserted and removed. A lid 3 is supported on the machine body 1 so as to be movable up and down.
The lid 3 is pushed up by a wire spring 4 that is an open spring, and is normally held in the open position. When the washing tub 2 is pushed into the washing machine main body 1, the lid 3 is pulled down against the wire spring 4 by the cam action of the cam mechanism (by the inclined cam 50 and the cam roller 31).

When the lid 3 is pulled down, the cleaning tank 2 is closed and sealed with the packing p. Support plates 10 are respectively fixed to the left and right sides of the lid 3, and cam rollers 31 are attached to the front, rear, left and right sides of the support plate 10. Further, the center of the wire rod spring 4 is locked to the side wall of the dishwasher 1, and the shaft of the guide roller 32 is pushed up at the front and rear side ends of the wire rod spring 4, thereby pushing up the lid 3.
There is a pair of front and rear inclined cams 50 at the upper end of the side wall of the cleaning tank 2, the inclined guide holes 12 are provided at the upper ends of the left and right side walls of the cleaning machine body 1, the cam roller 31 and the guide roller 32 are provided on the lid 3, and the cam roller 31 is inclined. A guide roller 32 is inserted into the inclined guide hole 12 so as to face the cam 50.

When the cleaning tank 2 is pushed into the main body 1 of the washing machine, the inclined cams 50 and 50 of the cleaning tank 2 come into contact with the cam rollers 31 and 31 at the final stage of the pushing stroke, and are pushed by the inclined cam surface 11a. The lid 3 is pulled down via At this time, the guide roller 32 moves obliquely backward along the guide hole 12 while moving downward in the inclined guide hole 12. The lid 3 moves downward relative to the upper edge surface of the cleaning tank 2 while moving rearward relative to the upper edge surface of the cleaning tank 2 due to the backward movement. Accordingly, the packing p is dragged while being compressed by the backward movement of the lid 3 after the upper edge surface of the cleaning tank 2 contacts the packing p of the lid 3.
The above is a configuration within the scope of the prior art.

Next, the outline of the centering mechanism in the first embodiment will be described.
Long holes (cam recesses) 22 in the front-rear direction are provided on the left and right sides of the lid 3, and conical protrusions 23 are provided on the rear upper surface of the cleaning tank 3. The width of the long hole 22 (width in the left-right direction) is 10 mm, and the length of the long hole 22 (length in the front-rear direction) is about twice the diameter of the base of the conical protrusion 23 (cam convex portion). When the body 3 is lowered, the conical protrusion 23 is fitted into the long hole 22 with a margin in the front-rear direction.
In this example, the maximum diameter of the conical protrusion 23 is 12 mm and the height is 7 mm, the conical angle of the conical protrusion 23 is 40 degrees (inclination angle is 20 degrees), and the maximum is 4 mm in both the left and right directions. Can be adjusted in the horizontal direction.
In this embodiment, the long hole 22 is provided in the lid, but the same effect can be obtained even if this is provided in the cleaning tank and the conical protrusion 23 is provided on the lid side.

The inclined cams 50 are provided on the left and right sides of the cleaning tank and are swinging arms that swing in the vertical direction. The front end of the tilting cam 50 is pivotally supported on the side wall of the cleaning tank 2 by a support shaft 50d. It swings up and down around the center. An inclined cam surface 11a is provided on the lower surface of the rear portion of the inclined cam 50, and an arcuate recess 50b is provided on the lower surface of the center. The inclination angle of the inclined cam surface 11a in this embodiment is 45 degrees, and the vertical height (cam lift) of the inclined surface is 15 mm.
There is a protrusion 60 at a position below the inclined cam 50, and the inclined cam is supported from below by the protrusion 60, the lower position is defined, and is held substantially horizontally.
The swing arm may be provided not only on the left and right sides but also on the left and right sides.

A coil portion sr of a torsion coil spring s1 is fitted and attached to the support shaft 50d. The lower arm sd of the torsion coil spring s1 presses the inclined cam 50 downward, while the upper arm su is an upper protrusion 61. Is held down. The torsion coil spring s1 has an upper arm su and a lower arm sd at both ends of the coil portion.
The preload of the torsion coil spring s 1 is set to about 1 kgf, and the inclined cam 50 is firmly pressed against the protrusion 60.
In this example, the lid body 3 is moved up and down by the cam mechanism by the inclined cam 50 and the cam roller 31. The opening / closing stroke of the lid body 3 is 9 mm, and the standard compression amount of the packing is about about the opening / closing stroke. 3 mm.
The cam lift of the inclined cam surface is 15 mm as described above, but this is at least 5 mm longer than the opening / closing stroke of the lid in consideration of assembly errors of the inclined cam, cam roller, and the like.

When the cleaning tank 2 is completely pushed into the main body 1 of the cleaning machine, the lid 3 is pulled down by the cam roller 31 to close the lid, and the cam roller 31 engages with the recess 50b on the lower surface of the inclined cam 50 to close the lid. (See FIG. 2).
When the cleaning tank 2 is pulled forward (leftward in FIG. 1), the inclined cam 50 is pulled forward, and the inclined cam 50 is pushed upward against the torsion coil spring (cam spring) s1, and the cam roller 31 is pulled up. Is removed from the recess 50b (see FIG. 3), and then the cleaning tank 2 is pulled out from the main body of the cleaning machine.

  In the first embodiment, when the cleaning tank 2 is pulled with a force of about 2 kgf, the left and right cam rollers 31 are disengaged from the recesses 50 b of the left and right inclined cams 50. The locking force with respect to the cam roller 31 by the recess 50b varies depending on the diameter of the cam roller 31 and the strength of the preload of the torsion coil spring s1, but can be easily adjusted by adjusting the depth of the arc-shaped recess 50b. Is done.

When the cleaning tank 2 is pushed into the washing machine main body 1 and approaches the end point of the pushing operation, the inclined cam 50 approaches the cam roller 31 and eventually the cam roller 31 comes into contact with the inclined cam surface 11a of the inclined cam 50. Thereafter, the cam roller 31 is pushed down by the inclined cam surface 11a of the inclined cam 50 (FIG. 4).
When the cam roller 31 is pushed down, the lid 3 is pulled down against the wire spring 4. At this time, the torsion coil spring s1 is held at a predetermined position where the inclined cam 50 is pressed against the protrusion 60 without being deformed.

  When the packing p comes into contact with the cleaning tank 2 and is compressed, the resistance to the lowering of the lid 3 increases accordingly. When the pull-down resistance of the lid 3 exceeds the preload w of the torsion coil spring s1 (point “a” in FIG. 5), thereafter, the inclined cam 50 moves upward against the torsion coil spring s1 about the support shaft 50d. Therefore, the cam roller 31 hardly descends any more and stops at that position. Therefore, the tightening force on the lid 3 has a predetermined increment due to an increase in torsion of the torsion coil spring s1 (see the range of “e” to the right from the “a” point in FIG. 5), but this increment is small, and this implementation In the example, an increment of about 1.6 kgf is finally expected (final spring force in FIG. 5). Therefore, the durability of the packing p is not significantly impaired because the lid body receives an excessive tightening force.

  Finally, the cam roller 31 engages with the recess 50b on the lower center surface of the inclined cam 50 (FIG. 1) and is held in that position. The inclined cam 50 is connected to the lid 3, and the lid 3 is engaged with the cleaner main body 1 in the front-rear direction by the guide roller 32, so that the cleaning tank 2 includes the cam roller 31, the inclined cam 50, the lid It is fixed in the front-rear direction with respect to the cleaning machine main body 1 via the body 3.

   In the above-described first embodiment, the longitudinal holes 22 in the front-rear direction are provided on the left and right sides of the lid 3, and the conical protrusions 23 are provided on the rear upper surface of the cleaning tank 3 to constitute a centering mechanism. This is an example in which the rear left and right inclined cams are made of swinging arms in accordance with the arrangement of the centering mechanism. However, centering mechanisms can be provided on the left and right of the front and rear, and the front, rear, left and right inclined cams can be made by swinging arms. This has an even centering effect on the entire lid, and the lid It is possible to prevent an excessive tightening force from being applied to the whole.

The second embodiment of FIGS. 6 and 7 is different from the first embodiment in that the cam spring is not a torsion spring but a tension spring in the inclined cam 11, and the other configurations are the same.
The inclined cam 50 pivotally supported by the support shaft 50d on the side surface of the cleaning tank 2 is provided with a tongue piece 50e facing downward at a position biased toward the side wall of the cleaning tank so as not to interfere with the cam roller 31. A tension spring s2 is stretched between the tongue piece 50e and the lower fixing pin 50f, and the inclined cam 50 is pulled downward by the tension spring s2 to be pressed against the lower protrusion 60. The preload of the tension spring is set to be approximately the same as the preload of the torsion coil spring s1 of the first embodiment.

  The operation of the second embodiment is the same as that of the first embodiment. When the inclined cam 50 contacts the cam roller 31, the cam roller 31 is pushed down by the inclined cam surface 11a, and the lid body 3 is pulled down and tightened. When the compressive force of the lid 3 on the packing p reaches a predetermined strength, the inclined cam 50 rotates upwardly about the support shaft 50d against the tension spring s2, and thereafter the lid 3 is applied to the lid 3. The tightening force does not increase so much, so that the lid body is tightened with an excessive force, and as a result, the durability of the packing p is not significantly impaired.

These are the top views of Example 1 or Example 2. FIG. These are XX sectional drawing of the closed state of Example 1. FIG. These are YY sectional drawing of FIG. These are XX sectional drawing of the initial state of the lid opening operation | movement of Example 1. FIG. These are YY sectional drawing of a cover open state. These are the schematic diagrams which show the spring force of the spring for cams in Example 1. FIG. These are XX sectional drawing of the principal part of the closed state of Example 2. FIG. These are YY sectional drawing of the closed state of Example 2. FIG. These are sectional drawings of background art. FIG. 9 is a partially enlarged view showing a state in which the lid of FIG. 8 moves from open to closed. FIG. 10 is a partially enlarged view in the closed state similar to FIG. 9. These are sectional drawings of a prior art. These are the top views of a prior art.

Explanation of symbols

1: Cleaning machine body 2: Cleaning tank 3: Cover body 4: Wire rod spring (lid spring)
10: support plate 11: inclined cam 11a: inclined cam surface 12: inclined guide hole 22: long hole (cam recess)
23: Conical protrusion (cam convex part)
31: Cam roller 32: Guide roller 50: Inclined cam 50b: Recess 50d: Support shaft 50e: Tongue piece 60, 61: Projection w: Preload of cam spring p: Packing s1: Torsion coil spring (cam spring)
s2: tension spring (cam spring)
sr: Coil portion of the coil spring s1

Claims (6)

The cleaning tank is supported to be freely inserted into and removed from the main body of the cleaning machine via a rail, and a lid with a packing on the lower surface is supported to be movable up and down on the main body of the cleaning machine. In a pull-out dishwasher designed to lower and close the lid against the opening spring by the cam action,
The tilt cam is a swing arm that swings in the vertical direction, the front end of which is pivotally supported on the side wall of the cleaning tank by a support shaft,
There is a downward inclined cam surface on the lower surface of the rear part of the inclined cam,
A drawer-type dishwasher in which an inclined cam is biased downward by a cam spring and is pressed against a stopper with a predetermined preload of the cam spring and held in a predetermined position. The cleaning tank is supported to be freely inserted into and removed from the main body of the cleaning machine via a rail, and a lid with a packing on the lower surface is supported to be movable up and down on the main body of the cleaning machine. In a drawer type dishwasher equipped with a centering mechanism that adjusts the position of the lid body in the left-right direction against the washing tank by lowering the lid body against the opening spring by cam action. ,
The tilt cam is a swing arm that swings in the vertical direction, the front end of which is pivotally supported on the side wall of the cleaning tank by a support shaft,
There is a downward inclined cam surface on the lower surface of the rear part of the inclined cam,
A drawer-type dishwasher in which an inclined cam is biased downward by a cam spring and is pressed against a stopper with a predetermined preload of the cam spring and held in a predetermined position.   3. The cam spring is a torsion coil spring mounted on the support shaft of an inclined cam, and the inclined cam is biased downward by the cam spring and pressed against the stopper. Dishwasher.   The dishwasher according to claim 1 or 2, wherein a recess is formed in the lower surface of the central portion of the swing arm, and the cam roller is detachably engaged with the recess. There are a concave part and a convex part that fit into the lid and the washing tank, and the centering mechanism is configured by this,
The centering mechanism is provided on the front left and right or rear left and right,
3. The dishwasher according to claim 2, wherein a tilt cam mechanism comprising a tilt cam swinging up and down and a cam roller is provided on the left and right sides. There are a concave part and a convex part that fit into the lid and the washing tank, and the centering mechanism is configured by this,
The centering mechanism is provided on the front left and right and rear left and right,
3. The dishwasher according to claim 2, wherein an inclined cam mechanism including a vertically swinging cam and a cam roller is provided on each of the front left and right and the rear left and right.

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