TWI789010B - Scraper tool with changeable blade - Google Patents

Abstract

The present invention discloses a scraper tool which mainly includes a mounted plate, a blade placed on the mounted plate, a bolt and a pressing component. The blade has multiple cutting edges and can be rotated on the mounted plate to turn the cutting edge you want to use forward. The bolt and the pressing component are used to press or release the blade to prohibit or allow the blade to be rotated, wherein when any cutting edge of the blade is turned forward, the cutting edge that has been turned forward protrudes from a front side of the mounted plate for pushing and scraping.

Description

Replaceable scraper tool

The present invention relates to a scraper tool, in particular to a scraper tool with replaceable blades.

In many workplaces, it is often necessary to use a scraper tool to scrape off glue, paint or other foreign matter adhering to the wall or floor. When a blade of the scraper tool is worn out to bluntness, a new blade needs to be replaced, but the general scraper tool does not have the function of changing the blade. In response to this problem, patents such as Taiwan Publication No. 371976 and No. 278423 disclose scrapers with the function of replacing blades. However, frequent replacement of blades is also a waste. Therefore, it is necessary to propose a new type of scraper that can reduce the frequency of blade replacement. In addition, the scraper tool disclosed in the Taiwan Patent Publication No. 371976 obviously performs the action of scraping foreign objects in a "rake" manner, and cannot scrape foreign objects in a "push scraping" manner.

In view of the above-mentioned problems of the prior art, the present invention provides a scraper tool with replaceable blades, which not only scrapes foreign matter by pushing and scraping, but also has multiple blades for replacement, so as to reduce the frequency of blade replacement.

More specifically, the scraper tool of the present invention includes a handle, a connecting plate connected to the handle, a bearing plate connected to the connecting plate, a blade placed on the bearing plate, and a blade for forcing or releasing A bolt and a pressing part of the blade. in, The connecting plate includes a rear section and a front section, and the rear section is connected with the handle. The bearing plate includes a front side, a rear side and a bearing surface bounded between the front side and the rear side, the bearing surface has a first through hole, the rear side is connected to the connection the front section of the board. The blade has an upper side, a lower side, a second through hole passing through the upper side and the lower side, and a plurality of side parts. The lower side is stacked on the bearing surface of the bearing board. The second through hole is opposite to the first through hole on the bearing surface of the bearing board. Each of the side portions forms an edge. The bolt passes through the first through hole of the bearing plate and the second through hole of the blade, so that the blade can rotate around the bolt. The urging member is connected to the bolt and is operable to urge or release the blade to correspondingly prohibit or allow the blade to be rotated. Wherein, when the blade is rotated to make its two sides face forward and backward respectively, the side facing forward protrudes from the front side of the carrier plate.

In one embodiment, the plug of the scraper tool of the present invention includes a head, a neck extending from the head, and a plug extending from the neck, and the outer diameter of the head is larger than the first The through hole and the second through hole, the neck is located in the first through hole and the second through hole, the bolt has an external thread and passes through the first through hole and the second through hole, the forcing The fastener has an internal thread that can be screwed into the external thread.

In one embodiment, the neck portion of the bolt of the scraper tool of the present invention is polygonal and wedged in the first through hole and the second through hole which are also polygonal.

In one embodiment, the knife handle of the scraper tool of the present invention has an abutment edge, and the abutment edge is against the rear-facing side of the blade.

In one embodiment, the shapes of each side of the blade of the scraper tool of the present invention are different, such as arc shape, straight shape, flat serrated shape and pointed serrated shape.

In one embodiment, the sides of the blade of the scraper tool of the present invention have the same shape.

In one embodiment, the shape of at least one side of the blade of the scraper tool of the present invention is different from that of the other sides.

In one embodiment, the carrier plate of the above-mentioned scraper tool of the present invention The first through hole has a length, and the bolt can move forward and backward along the length of the first through hole when the blade is released.

In one embodiment, the knife handle of the scraper tool of the present invention has an abutting edge, and when the bolt is located at a first position of the first through hole, the abutting edge abuts against the rearward facing portion of the blade. The side edge, so that the blade released by the pressing member cannot rotate 360 degrees with the bolt as the axis, and when the bolt is located at a second position of the first through hole, the abutting edge is far away from the The side towards the rear, so that the blade released by the pressing member can rotate 360 degrees with the bolt as the axis.

In one embodiment, the bolt of the scraper tool of the present invention has a neck located in the first through hole and the second through hole of the carrier plate, the cross section of the neck is polygonal, and the first through hole The range size of the second position of a through hole allows the neck of the bolt to rotate, the difference between the first position (inclusive) of the first through hole and the second position (exclusive) of the first through hole The size of the range between only allows the neck to move forward and backward, and does not allow the neck to rotate.

1: handle

12a: Upper clip

12b: Lower clip

121: Keyhole

123: against the edge

124: bottom end

124a: side

2: Connecting board

21: front section

22: Posterior segment

23: Through hole

221: tooth fork

3: Loading board

31: rear side

32: front side

3a: Bearing surface

33, 33a, 33b, 33c: first through hole

331a, 331b, 331c: first position

332a, 332b, 332c: second position

4, 4a, 4b: blade

41: upper side

42: Look at the side

43: side

44: Second through hole

51: Bolt

52: Urgent parts

511: head

512: Neck

513: bolt

6: Locking piece

61: Bolt

62:Nut

7: Items to be scraped

w1: width

Fig. 1 shows a three-dimensional exploded view of a first preferred embodiment of the scraper tool of the present invention.

FIG. 2 shows a perspective view of the first preferred embodiment of the present invention.

Figure 3 shows a top view of the first preferred embodiment of the present invention.

FIG. 4 shows an exploded perspective view of the first preferred embodiment of the present invention at another viewing angle.

FIG. 5 shows a schematic view of the action of the first preferred embodiment of the present invention.

FIG. 6 shows a perspective view of a second preferred embodiment of the present invention.

FIG. 7 shows a perspective view of a third preferred embodiment of the present invention.

FIG. 8 shows a perspective view of a fourth preferred embodiment of the present invention.

FIG. 9 shows a schematic diagram of movement and rotation of the fourth preferred embodiment of the present invention.

10 to 12 are schematic diagrams of the edge changing process of the fourth preferred embodiment of the present invention.

FIG. 13 shows a perspective view of a fifth preferred embodiment of the present invention.

Fig. 14 shows a top view of the fifth preferred embodiment of the present invention.

FIG. 15 shows a schematic view of movement and rotation of the fifth preferred embodiment of the present invention.

FIG. 16 shows a perspective view of a sixth preferred embodiment of the present invention.

Fig. 1 and Fig. 2 show a first preferred embodiment of a blade-replaceable scraper tool of the present invention, which scraper tool includes a handle 1, a connecting plate 2, a bearing plate 3, a blade 4, and a bolt 51 and a pressing piece 52, wherein:

The knife handle 1 is provided for a user to hold, and it can be made of metal (such as iron or stainless steel) or plastic, but not limited thereto. In the first preferred embodiment, the part where the handle 1 is connected to the connecting plate 2 forms an upper clamping piece 12a and a lower clamping piece 12b, and a gap 122 is spaced between the upper clamping piece 12a and the lower clamping piece 12b , so as to connect the connecting board 2, which will be described later.

The connecting plate 2 includes a rear section 22 , a front section 21 and a through hole 23 , the rear section 22 is connected to the handle 1 , and the front section 21 is connected to a rear side 31 of the supporting plate 3 . In the first preferred embodiment, the connection between the connecting plate 2 and the handle 1 is screwed, so two through holes 23 on the connecting plate 2 are opposite to the handle 1 respectively. Two locking holes 121, two locking members 6 pass through the two through holes 23 on the connecting plate 2 and the two locking holes 121 on the knife handle 1, and lock the knife handle 1 and the connecting plate 2 together. Preferably, each locking member 6 includes a bolt 61 and a nut 62 screwed to the bolt 61 . In addition, the numbers of the aforementioned through holes 23 , locking holes 121 and locking members 6 are not limited to the aforementioned, and may also be one or more.

In this embodiment, in order to make the connection between the knife handle 1 and the connecting plate 2 more stable, the knife handle 1 forms the upper clamping piece 12a and the lower clamping piece 12b as described above. The rear section 22 of the connection plate 2 is inserted into the gap 122, and the locking member 6 locks the rear section 22 of the connection plate 2 so that the rear section 22 of the connection plate 2 is clamped by the upper clip 12a and the lower clip. The sheet 12b is clamped tightly.

Furthermore, the connection between the connecting plate 2 and the knife handle 1 is not limited to the above-mentioned screw connection, for example, the rear section 22 of the connecting plate 2 and the knife handle 1 can also be integrally formed to form a connection, here Under such circumstances, of course, the above-mentioned through hole 23 , locking hole 121 , locking member 6 , upper clamping piece 12 a and lower clamping piece 12 b are not needed.

The carrying board 3 includes a front side 32 , the aforementioned rear side 31 and a carrying surface 3 a bounded between the front side 32 and the rear side 31 . The supporting surface 3 a has a first through hole 33 , and the first through hole 33 is used for the bolt 51 to pass through. In the first preferred embodiment, the rear side 31 of the supporting board 3 and the front section 21 of the connecting board 2 are integrally formed to form a connection, but the present invention is not limited thereto.

As shown in FIGS. 1 and 4 , the blade 4 has an upper side 41 , a lower side 42 , a second through hole 44 passing through the upper side 41 and the lower side 42 , and a plurality of side edges 43 . The second through hole 44 is opposite to the first through hole 33 of the bearing surface 3 a of the bearing plate 3 , and the lower side 42 is stacked on the bearing surface 3 a of the bearing plate 3 . In this first preferred embodiment, this blade 4 is a quadrangle, so there are four sides 43, yet, this blade 4 also can be a triangular blade in a second preferred embodiment as shown in Figure 6 4a (with three side edges 43a), or a circular blade 4b (with at least four side edges 43b) in a third preferred embodiment as shown in Figure 7, or blades of other shapes, such as Six to octagonal blades.

In each of the above-mentioned preferred embodiments, the blade 4 has four sides 43, and the shape of each side 43 is arc shape, straight shape, flat-head serrated shape and pointed shape respectively. The head is serrated, but not limited thereto. For example, the sides 43 of the blade 4 can also have all the same (as shown in FIG. 6 ) or different shapes, or the blade 4 has at least one side 43 The shape of is different from the shape of other sides 43 (as shown in FIG. 7 ). The bolt 51 passes through the first through hole 33 of the supporting plate 3 and the second through hole 44 of the blade 4 , so that the blade 4 can rotate around the bolt 51 . In each of the above-mentioned preferred embodiments, a bolt can be selected as the bolt 51 , but it is not limited thereto.

The pressing member 52 is connected to the bolt member 51 and can be operated to press or release the blade 4 to correspondingly prohibit or allow the blade 4 to be rotated. In each of the above preferred embodiments, the bolt 51 includes a head 511, a neck 512 extending from the head, and a bolt 513 extending from the neck 512. The outer diameter of the head 511 is larger than The first through hole 33 and the second through hole 44, the neck portion 512 is located in the first through hole 33 and the second through hole 44, the plug portion 513 has an external thread and passes through the first through hole 33 and the second through hole 44, the pressing member 52 has an internal thread that can be screwed into the external thread. In short, the bolt 51 is a bolt, and the pressing member 52 is a nut (such as a butterfly nut)

In the above-mentioned preferred embodiment, after loosening the pressing member 52, or separating the pressing member 52 from the bolt member 51, one of the side edges 43 can be rotated by rotating the blade 4. The position facing forward, at the same time, the other side 43 will correspondingly turn to the position facing the rear. 2 and 3 show that the arc-shaped side 43 has been turned to a forward position, and the straight side 43 has been turned to a rearward position. After utilizing the pressing member 52 and the bolt member 51 to fasten the blade 4 to the carrier plate 3, since the blade 4 has been facing the side 43 forward (for example, the side 43 in an arc shape) is protruding from the front side 32 of the carrier plate 3, therefore, as shown in Figure 5, the use Or just can operate this scraper tool to move forward (working direction), so that this blade 4 pushes and scrapes an object 7 to be scraped toward this side 43 (for example this side 43 that is arc shape) toward the front at present.

Known from the above description, each side 43 of the blade 4 can be regarded as a blade for pushing and scraping the object 7 to be scraped, and the triangular blade 4a in the above-mentioned second preferred embodiment can be used Its tip is used as the blade (sharp blade) of the top stabbing object 7 to be scraped off, therefore, the user can decide whether to change it according to the needs of the workplace or the degree of wear and tear of any side 43, 43a, 43b (blade). Blade, hereby explain the blade changing process as follows:

First, the user first loosens the pressing member 52, or separates the pressing member 52 from the bolt 51, so that the pressing member 52 releases the blade 4 and no longer presses the blade 4. , the blade 4 can be rotated. Then, the user turns the blade 4 to turn the desired side 43 (for example, the side 43 in a serrated shape) to the front instead of the other sides 43 originally facing forward (for example, the arc-shaped side 43 ). the side 43). Finally, the pressing member 52 is operated to tighten the blade 4 to prohibit the blade 4 from being rotated. Like this just can utilize the side edge 43 that just changed (for example this side edge 43 of flat-head serrated shape) to scrape off this thing 7 to be scraped with the action shown in Figure 5. Through the aforementioned blade changing operation, the same blade 4 has multiple sides 43 (blades) for replacement or selection, so as to reduce the frequency of blade 4 replacement.

In the above-mentioned preferred embodiment, as shown in Figure 1 and Figure 2, the part of the handle 1 connected to the connecting plate 2 further forms an abutment edge 123, because the abutment edge 123 is against the blade 4 towards the rear. The side edge 43 (such as the straight side edge 43), therefore, the thrust force given by the user to the handle 1 can be effectively transmitted to the blade 4, and the abutting edge 123 can cooperate with the bolt 51 Strong support is provided to the blade 4 to facilitate the above-mentioned scraping action. Preferably, the abutting edge 123 is essentially the above-mentioned upper clip A front end of the piece 12a may also be a front end of the lower clamping piece 12b.

In this embodiment, as shown in FIG. 4 , the neck 512 of the above-mentioned bolt 51 is polygonal and is wedged in the polygonal first through hole 33 on the carrier plate 3 , and is also wedged in the blade 4 The second through hole 44 is polygonal in shape. Thereby, when the pressing member 52 is rotated, the bolt member 51 will not rotate accordingly, so as to facilitate the action of using the pressing member 52 to press against the blade 4 .

In this embodiment, as shown in FIG. 3 , the rear section 22 of the connecting plate 2 forms two forks 221 , and the two forks 221 are arranged side by side with a width w1 apart.

Fig. 8 shows a fourth preferred embodiment of the present invention, the first through hole 33a of the carrier plate 3 is a long hole with a length, and the bolt 51 can move along the blade 4 when the blade 4 is released. The longitudinal direction of the first through hole 33a moves forward and backward. Furthermore, as shown in FIGS. No interference in the first through hole 33a. In addition, the size of the second through hole 44 of the blade 4 needs to be sufficient to allow the blade 4 to rotate 360 degrees around the bolt 51. As for the second The shape of the through hole 44 can be any shape, such as square, long, circular, triangular or other shapes (not shown in the figure).

As shown in FIG. 10 , in the fourth preferred embodiment, the handle 1 has an abutment edge 123, and when the bolt 51 is located at a first position 331a of the first through hole 33a, the abutment edge 123 against the rearward side 43 of the blade 4, so that the blade 4 released by the pressing member 52 (not shown) cannot rotate 360 degrees on the axis of the bolt, as shown in FIG. As shown in 11, when the bolt member 51 is located at a second position 332a of the first through hole 33a, the abutting edge 123 is far away from the side edge 43 facing backward, so that it is pressed by the pressing member 52 (not shown in the figure). Shown) the blade 4 released can make 360 degrees with the bolt 51 as the axis Rotate, as shown in Figure 12, when the blade 4 turns to the side 43 that the user wants to use (for example, the side 43 of the flat serrated shape) turns to the front, the blade 4 can be moved back to the first through hole 33a of the first position 331a and tightens the urging member 52 .

13 to 15 show a fifth preferred embodiment of the present invention, the bolt 51 has a neck 512 located in the first through hole 33b and the second through hole 44 of the carrier plate 3, the neck 512 has a polygonal cross-section, and the range R2 of the second position 332b of the first through hole 33b allows the neck 512 of the bolt 51 to rotate, and the first position 331b of the first through hole 33b is the same as the first position 331b of the first through hole 33b. The range R1 between the second positions 332b of the first through hole 33b only allows the neck 512 to move forward and backward, and the neck 512 is interfered by the first through hole 33b and does not allow rotation. In a preferred embodiment, the cross section of the neck portion 512 is quadrilateral.

Figure 16 shows a sixth preferred embodiment of the present invention, the first through hole 33c is a hole that extends to the front side 32 of the carrier plate 3 and opens outward, and its usage is the same as that of the fourth preferred embodiment The examples are the same, so I won't repeat them here.

Thereby, when the user first operates the pressing member 52 to release the blade 4, the first positions 331a, 331b, 331c of the first through holes 33a, 33b, 33c of the blade 4 can be moved in a translational manner. To the second position 332a, 332b, 332c of the first through hole 33a, 33b, 33c to allow the blade 4 to be turned to the side 43 that the user wants to use and turn to the front without the need for the pressing member 52 completely released.

handle 1 Upper clip 12a Lower clip 12b keyhole 121 against edge 123 connection plate 2 Front section 21 Back section 22 Via 23 Tooth fork 221 Loading board 3 Rear side 31 Front side 32 Bearing surface 3a The first through hole 33 Blade 4 Upper side 41 Side 43 Second through hole 44 pressing component 5 Bolt part 51 Urgent part 52 Locking piece 6 Bolt 61 Nut 62

Claims (10)

A scraper tool with replaceable blades, comprising: a handle; a connecting plate, including a rear section and a front section, the rear section is connected to the handle; a carrying plate, including a front side, a rear side and bounded by the front A bearing surface between the side and the rear side, the bearing surface has a first through hole, the rear side is connected to the front section of the connecting plate; a blade has an upper side, a lower side, through the A second through hole and a plurality of sides on the upper side and the lower side, the second through hole is opposite to the first through hole on the bearing surface, the lower side is stacked on the bearing surface of the bearing plate; a bolt a member passing through the first through hole of the carrier plate and the second through hole of the blade, so that the blade can rotate around the bolt; and an urging member is connected to the bolt and can be operated To tighten or release the blade to correspondingly prohibit or allow the blade to be rotated; wherein, when the blade is rotated so that its two sides face the front and the rear respectively, facing forward The side edge protrudes from the front side edge of the carrier plate. The scraper tool as claimed in claim 1, wherein the plug includes a head, a neck extending from the head, and a plug extending from the neck, and the outer diameter of the head is larger than the first through perforation and the second through hole, the neck is located in the first through hole and the second through hole, the bolt has an external thread and passes through the first through hole and the second through hole, the tight The component has an internal thread that can be screwed into the external thread. The scraper tool as claimed in claim 2, wherein the neck portion of the bolt is polygonal and is wedged in the first through hole and the second through hole which are also polygonal. The scraper tool as claimed in claim 1, wherein the handle has an abutment edge, and the abutment edge is against the rearward-facing side of the blade. The scraper tool as claimed in claim 1, wherein the blade has four sides, each of which is arc-shaped, straight, flat-end serrated, and pointed-end serrated. The scraper tool as claimed in claim 1, wherein the sides of the blade have all the same or different shapes. The spatula tool as claimed in claim 1, wherein the shape of at least one side of the blade is different from that of the other sides. The scraper tool as claimed in claim 1, wherein the first through hole of the carrier plate has a length, and the bolt can move forward and backward along the length direction of the first through hole when the blade is released. move. The scraper tool as claimed in claim 8, wherein the handle has an abutting edge, and when the bolt is located at a first position of the first through hole, the The abutting edge bears against the rearward side of the blade, so that the blade released by the pressing member cannot rotate 360 degrees around the bolt, when the bolt is located at one of the first through holes During the second position, the abutment edge is away from the side edge facing the rear, so that the blade released by the pressing element can rotate 360 degrees around the bolt element. The scraper tool as claimed in claim 9, wherein the bolt has a neck located in the first through hole and the second through hole of the carrier plate, the cross section of the neck is polygonal, and the first The size of the range of the second position of the through hole allows the neck of the bolt to rotate, between the first position (inclusive) of the first through hole and the second position (exclusive) of the first through hole The size of the range only allows the neck to move forward and backward, and does not allow the neck to rotate.

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