JP3230098U - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crusher capable of suppressing an adverse effect on assembly accuracy of each part of a crusher due to an impact when an upper housing is opened. A crusher includes an upper housing 20 and a lower housing 22 that supports the upper housing 20 so as to be openable and closable, and is mounted on a gantry portion 13. Objects such as sprue runners include a comb-shaped fixed blade provided on the upper housing 20, a comb-shaped fine crushing rotary blade provided on a rotating shaft 36 arranged on the lower housing 22, and coarse crushing. It is crushed by a rotary blade. On the other hand, a support rod 60 that comes into contact with the upper housing 20 when the upper housing 20 is opened is erected on the upper portion of the gantry portion 13. As a result, the upper housing 20 in the opened state can be received by the support rod 60, so that the impact when the upper housing 20 is opened is less likely to be directly transmitted to the crusher. [Selection diagram] FIG. 8

Description

The present invention relates to a crusher for crushing an object (object to be crushed or object to be processed) such as a sprue runner generated by resin molding.

As such a prior art, there is a prior art described in Patent Document 1. In the crusher described in the prior art, the upper housing is swingably provided in the lower housing centering on the support pin, and the comb-shaped fixed blades arranged in the upper housing and the lower housing. An object such as a sprue runner is crushed in cooperation with the provided fine crushing rotary blade and coarse crushing rotary blade.

In order to crush an object by the cooperation of such a fixed blade, a fine crushing rotary blade and a coarse crushing rotary blade, it is extremely important to maintain a gap between the fixed blade and both rotary blades at an appropriate distance. If such a gap cannot be properly maintained, the crushing of the object may be hindered, or in some cases, the fixed blade may come into contact with the fine crushing rotary blade or the coarse crushing rotary blade, causing malfunction or damage. This is because there is a risk.

On the other hand, in this type of crusher, fine powder and crushed pieces generated as a result of crushing adhere and remain in various places, so that it is necessary to perform regular cleaning and maintenance. Such fine powder and debris can be found in various places such as around each blade, between comb-shaped teeth, gaps between parts, and inside a cover case that prevents the discharge of coarsely crushed objects. In order to clean the inside of the crusher, it was necessary to remove each part including the fixed blade and the double rotary blade and disassemble and clean it. Then, after cleaning, each part is reassembled as before, but at that time, for the reason described above, it is necessary to assemble so that the gap between the fixed blade and the fine crushing rotary blade and the coarse crushing rotary blade is an appropriate distance. Therefore, strict assembly accuracy is required.

In this way, in this type of crusher, strict maintenance is required for the clearance size between the fixed blade, the fine crushing rotary blade, and the coarse crushing rotary blade, and the assembly accuracy of each part that affects it. There is.

International Publication No. 2020/189314

However, in the prior art described in Patent Document 1, the center of gravity G of the upper housing is located rearward of the support pin, whereby the upper housing rotates rearward at an angle exceeding 90 degrees with respect to the lower housing. (Paragraph [0062], FIG. 9), when the upper housing is opened, the impact may be directly transmitted to the crusher and cause misalignment of each part, which is the assembly accuracy. There was a risk of adversely affecting the housing.

In particular, when the opening and closing operation of the upper housing is repeated, there is a great risk of this, and finally it may be difficult to maintain strict assembly accuracy.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a crusher capable of suppressing an adverse effect on the assembly accuracy of each component due to the opening / closing operation of the upper housing.

In order to achieve the above object, the present invention is characterized in that it is configured as follows.
That is, the present invention
A crusher that crushes objects
The upper housing, the lower housing that rotatably supports the upper housing, the rotating shaft rotatably supported by the lower housing, and the fixed blades arranged in the upper housing are mounted on the rotating shaft. , A main body including a rotary blade that crushes an object in cooperation with the fixed blade,
A support portion provided on the base portion on which the main body portion is placed and receiving the upper housing when the upper housing is opened, and a support portion.
It is characterized by having.

According to the present invention, since the upper housing can be received by the support portion provided on the base portion on which the main body portion is placed, the impact when the upper housing is opened is less likely to be directly transmitted to the crusher. As a result, even when the opening and closing operation of the upper housing is repeated, the positions of the parts are less likely to shift, and the adverse effect on the assembly accuracy can be suppressed.

In the present invention, as one of the preferred embodiments thereof, it is preferable that the support portion is composed of a support rod and an elastic member is attached to the tip end portion of the support rod. As a result, the impact when the upper housing is opened can be further mitigated.

In the present invention, the fixed blade is formed in a comb-like shape, and the rotary blade is composed of two types of rotary blades: a comb-shaped fine crushing rotary blade and a coarse crushing rotary blade having a larger outer diameter. be able to. In this case, the object is relatively coarsely crushed by the coarse crushing rotary blade having a large outer diameter, and the object is relatively finely crushed by the comb-shaped fixed blade and the fine crushing rotary blade.

As described above, according to the present invention, since the upper housing can be received by the support rod provided on the base portion on which the main body portion is placed, the impact when the upper housing is opened is less likely to be directly transmitted to the crusher. The adverse effect on the assembly accuracy of each part of the crusher can be suppressed as much as possible.

The front view of the crusher which concerns on embodiment of this invention. Left side view of the above crusher. Right side view of the above crusher. The perspective view of the main body of the crusher. The perspective view of the main body of the crusher with the upper housing open. Perspective view of the lower housing showing details of the cover case Sectional view of the main body of the crusher The left side view which shows the open / closed state of the upper housing of the crusher. Enlarged view of the main part of FIG. The left side view which shows the open / closed state of the upper housing in the crusher which concerns on a modification.

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

FIG. 1 is a front view of the crusher 10 according to the embodiment of the present invention, FIG. 2 is a left side view of the crusher 10, and FIG. 3 is a right side view of the crusher 10. In the following, the front-back direction, the left-right direction, and the up-down direction are defined with reference to FIG. That is, the front side in FIG. 1 is the "front side", the back side is the "rear side", and the direction connecting the front and the back in FIG. 1 is the "front-back direction". Further, the horizontal direction in FIG. 1 is referred to as the horizontal direction in the following description, and the vertical direction in FIG. 1 is referred to as the vertical direction in the following description.

As shown in FIGS. 1 to 3, the crusher 10 according to the present embodiment has a main body 12 for crushing an object such as a sprue runner generated by resin molding, and a gantry 13 on which the main body 12 is placed. A base portion), a charging hopper 14 for charging an object into the main body portion 12, and a recovery hopper 16 for collecting the crushed object crushed by the main body portion 12.

The main body 12 is a housing having a substantially cubic outer shape, and is composed of an upper housing 20 and a lower housing 22 on which the upper housing 20 is placed. Since the configuration of the main body 12 is substantially the same as the configuration of the main body of the crusher described in Patent Document 1, only the main portion will be described here.

As shown in FIGS. 4 and 7, the upper housing 20 is provided with an inlet 20a on the upper surface thereof for receiving an object charged from the charging hopper 14. The lower housing 22 is provided below the outlet 22a for discharging the crushed object to the recovery hopper 16.

The upper housing 20 is swingably attached to the lower housing 22 about a support pin 24 extending in the left-right direction on the rear surface side of the lower housing 22. As a result, the main body 12 can be opened and closed. In the figure, reference numeral 26 indicates a handle to be grasped by the user when opening the upper housing 20, and reference numeral 28 indicates a lock lever for keeping the upper housing 20 in a closed state.

The upper housing 20 is provided with a plurality of fixed blades 30. Each fixed blade 30 has a plate shape and has a comb-shaped cutting edge at its tip. Each fixing blade 30 is detachably fixed to the upper housing 20 by a bolt (not shown). In the present embodiment, the fixed blades 30 are provided on both front and rear sides of the inlet 20a, and three fixed blades 30 are provided on either side along the axial direction (that is, the left-right direction) of the rotating shaft 36. ing. However, the fixed blade 30 provided on the rear side functions as a scraper to prevent the crushed object from returning to the inlet 20a side.

A rotary shaft 36 is rotatably supported on the lower housing 22, and a plurality of fine crushing rotary blades 32 and coarse crushing rotary blades 34 are fixed to the rotary shaft 36. The fine crushing rotary blade 32 and the coarse crushing rotary blade 34 can be removed from the rotary shaft 36 for disassembly and cleaning.

As shown in FIG. 1, the rotary shaft 36 has a right end driven and connected to a motor (not shown) in the motor unit 38 and a left end supported by a bearing (not shown) in the bearing unit 40. The motor unit 38 and the bearing unit 40 are attached to the lower housing 22.

A plurality of finely crushed rotary blades 32 are provided on the rotary shaft 36. Each fine crushing rotary blade 32 has a substantially cylindrical shape, and is provided with a large number of comb-shaped cutting edges on the outer peripheral surface thereof at regular intervals in the circumferential direction. The comb-shaped cutting edge of each finely crushed rotary blade 32 meshes with the comb-shaped cutting edge of the corresponding fixed blade 30. As a result, the rotation of the rotary shaft 36 causes the plurality of fine crushing rotary blades 32 to rotate integrally, and the cutting edges of the fixed blade 30 and the fine crushing rotary blade 32 that mesh with each other cooperate to bite the object. It is designed to be crowded and finely crushed.

As shown in FIG. 7, the object finely crushed by the fine crushing rotary blade 32 passes between the comb-shaped cutting edges of the fixed blade 30 by being pushed forward by the rotating fine crushing rotary blade 32, and lower. It is conveyed toward the outlet 22a of the side housing 22. Then, the object that has passed through the fixed blade 30 separates from the finely crushed rotary blade 32 due to its own weight and falls into the recovery hopper 16 via the outlet 22a.

As shown in FIG. 7, each coarse crushing rotary blade 34 has two cutting edges having a point-symmetrical shape, and has a larger outer peripheral diameter than the fine crushing rotary blade 32. In the present embodiment, two coarse crushing rotary blades 34 are provided on the rotary shaft 36. In each coarse pulverization rotary blade 34, one coarse pulverization rotary blade 34 is arranged between two fine pulverization rotary blades 32 adjacent to each other along the axial direction of the rotary shaft 36. As a result, the plurality of coarsely crushed rotary blades 34 rotate between the side portions of the two fixed blades 30 adjacent to each other in the axial direction of the rotary shaft 36.

As the rotary shaft 36 rotates, the cutting edges of the plurality of coarse crushing rotary blades 34 roughly crush the object. Specifically, an object having a size that is on the fixed blade 30 and that the cutting edge of the fixed blade 30 and the cutting edge of the fine crushing rotary blade 32 cannot bite is made into a size that these cutting edges can bite. The coarse crushing rotary blade 34 coarsely crushes so as to be.

A part of the object coarsely crushed by the coarse crushing rotary blade 34 stays on the fixed blade 30, and the rest is conveyed into the lower housing 22 by the coarse crushing rotary blade 34. The portion of the coarse crushing rotary blade 34 on the outlet 22a side, that is, the substantially lower half of the coarse crushing rotary blade 34, is provided so that the object that has not yet been sufficiently crushed is not discharged to the recovery hopper 16 via the outlet 22a. A cover case 42 for covering is provided on the main body 12 of the crusher 10.

The cover case 42 has a semicircular shape when viewed in the axial direction of the rotating shaft 36, and is detachably provided on the lower housing 22. As shown in FIG. 7, the rotating coarse crushing rotary blade 34 enters the cover case 42 from the front side of the cover case 42 and exits from the rear side of the cover case 42. The cover case 42 is configured to cover the lower half of the rotation locus space of the coarse pulverization rotary blade 34, and the outer peripheral end of the rotating coarse pulverization rotary blade 34 moves along the bottom portion of the cover case 42. The cover case 42 is supported on both front and rear sides by cover case support members 44.

According to such a cover case 42, a part of the object crushed by the coarse crushing rotary blade 34 enters the cover case 42 by the rotating coarse crushing rotary blade 34, but the coarse crushing rotary blade 34 directly enters the cover case 42. It escapes from the cover case 42 again and is returned to the inlet 20a side of the fixed blade 30. Then, the returned object is finely crushed by the fixed blade 30 and the fine crushing rotary blade 32.

As shown in FIGS. 5 and 7, a pair of front side guide portions 20b and a pair of rear side guide portions 20c also form a part of the rotation locus space of the coarse crushing rotary blade 34 in the upper housing 20. Is provided. The space surrounded by the pair of front side guide portions 20b and the pair of rear side guide portions 20c is integrated with the space inside the cover case 42 to form the rotation locus space of the coarse crushing rotary blade 34 in the main body portion 12. Will be done. As a result, the object pushed forward by the coarse crushing rotary blade 34 first invades the space surrounded by the pair of front side guide portions 20b, then invades the space inside the cover case 42, and then the pair of rear sides. It will be returned to the entrance 20a side again via the space surrounded by the side guide portion 20c.

On the left and right sides of the side portion of the main body 12, guard plates are provided so that foreign matter such as a user's finger does not enter between the rear portion of the lower end of the upper housing 20 and the rear portion of the upper end of the lower housing 22. 46 is provided. When the upper housing 20 is opened, the guard plate 46 covers the gap between the upper housing 20 and the lower housing 22 to prevent foreign matter from entering the gap.

In the present embodiment, as shown in FIG. 8, when the main body portion 12 is in the fully open state (that is, when the upper housing 20 is maximally swiveled in the direction away from the lower housing 22), the upper housing thereof. The center of gravity of the upper housing 20 is located rearward of the support pin 24 in order to prevent the 20 from falling forward toward the lower housing 22 due to its own weight. Specifically, the upper housing 20 can rotate rearward about the support pin 24 at an angle slightly exceeding 90 degrees with respect to the lower housing 22. As a result, the entire upper housing 20 is located on the rear side with respect to the support pin 24.

The main body 12 of the crusher 10 configured as described above is placed on the gantry 13 and fixed with bolts or the like (not shown). The gantry portion 13 is provided with four leg portions 13a, and casters 13b are attached to the lower ends of the leg portions 13a so that the crusher 10 can be easily moved.

A support rod 60 is erected at a position on the rear side of the gantry portion 13 and near the center portion in the left-right direction of the main body portion 12. The support rod 60 is fixed on the gantry portion 13 by screwing, welding, or other means, and a urethane cap 60a (elastic member) is attached to the tip end portion (upper end portion) thereof. Then, when the upper housing 20 is opened, the upper housing 20 can be received by the tip end portion of the support rod 60. The state of being received by the tip of the support rod 60 is the fully open state of the upper housing 20.

Since the crusher 10 of the present embodiment is configured as described above, the impact when the upper housing 20 is opened is not easily transmitted directly to the main body 12 of the crusher 10, and even when the opening and closing operation of the upper housing 20 is repeated. , Each part is hard to shift. Therefore, it is possible to suppress an adverse effect on the assembly accuracy of each part of the crusher 10.

<< Modification example >>
Next, a modified example of the above embodiment will be described. FIG. 10 is a left side view of the crusher according to the modified example, and corresponds to FIG. 8 of the crusher 10 according to the above embodiment. The same or corresponding members as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The crusher according to this modification is different from the crusher 10 according to the above embodiment only in that a gas spring 70 is provided in the main body 12 to assist the opening / closing operation of the upper housing 20. Specifically, the gas spring 70 is provided near the support pin 24 which is the rotation center of the upper housing 20, one end of which is attached to the upper housing 20 side, and the other end of which is attached to the lower housing 22 side. ..

Due to the structure of the crusher, the upper housing 20 is very sturdy and heavy, so a large force is required for its opening / closing operation. Therefore, in the crusher according to the present modification, a gas spring 70 is provided between the upper housing 20 and the lower housing 22 to assist the opening / closing operation of the upper housing 20. Although only the left side surface of the main body portion 12 is shown in FIG. 10, one gas spring 70 is provided on each of the left and right side portions of the main body portion 12.

Also in such a modified example, a support rod 60 is provided on the upper portion of the gantry portion 13 as in the above embodiment. As a result, the impact when the upper housing 20 is opened is less likely to be directly transmitted to the main body 12 of the crusher, and even if the upper housing 20 is repeatedly opened and closed, the parts are less likely to be misaligned, which adversely affects the assembly accuracy. Can be suppressed.

Although the embodiments and modifications of the present invention have been described above, the present invention is not limited to the above embodiments and modifications. In the above-described embodiment and modified example, the support portion is composed of the support rod 60, but the support portion in the present invention is not necessarily limited to the rod-shaped member. Further, even when the support portion is composed of a rod-shaped member, the rod-shaped member does not have to be linear, and may be bent, for example. In the above embodiment and the modified example, the urethane cap 60a is attached to the tip of the support rod 60 as an elastic member, but the material of the elastic member does not have to be urethane, and whether or not such an elastic member is attached. May be optional.

10 Crusher 12 Main body 13 Stand (base)
20 Upper housing 22 Lower housing 30 Fixed blade 32 Fine crushing rotary blade (rotary blade)
34 Coarse crushing rotary blade (rotary blade)
36 Rotating shaft 60 Support rod (support part)
60a Urethane cap (elastic member)

Claims (2)

A crusher that crushes objects
The upper housing, the lower housing that rotatably supports the upper housing, the rotating shaft rotatably supported by the lower housing, and the fixed blades arranged in the upper housing are mounted on the rotating shaft. , A main body including a rotary blade that crushes an object in cooperation with the fixed blade,
A support portion provided on the base portion on which the main body portion is placed and receiving the upper housing when the upper housing is opened, and a support portion.
A crusher characterized by being equipped with. The crusher according to claim 1, wherein the support portion is composed of a support rod, and an elastic member is attached to the tip end portion of the support rod.

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