CN101152714B - Supporting structure of table-board type tool - Google Patents

Abstract

The present invention discloses a support structure for a table-type tool, comprising an upper frame for placing the table-type tool and a folding mechanism that supports the upper frame and can be operated between an expanded position and a folded position. The folding mechanism comprises a pair of first and second legs and a first connecting member pivotally connected to the upper frame, and a second and third connecting member pivotally connected to the legs and the first connecting member. When the folding mechanism is operated to the folded position, the first, second and third connecting members together drive the second leg to smoothly move closer to the first leg.

Description

Support structure for table top tools

technical field

The present invention is related to the structure supporting the table-top tool (such as platform saw), more specifically, it refers to a support structure for the table-top tool that can be pushed to change the working position and conveniently folded.

Background technique

Fig. 1 to Fig. 3 are a kind of structure of known collapsible tripod 2, and this tripod 2 is the tabletop type tool that can support such as platform saw 1 etc., and its basic composition includes a platform 3, a pair of first leg 4, A pair of second legs 5 , a pair of connectors 6 , two telescopic cylinders 7 and two side plates 8 . The top of the platform 3 carries the platform saw 1, and is provided with a long chute 3a on the side, and a handle 3d is provided at the front end, and the side plate 8 is connected to the rear end, and the pair of first legs 4 are pivotally connected to the side plate 8 And it can be turned between the folded position in FIG. 2 and the unfolded position in FIG. 3. The pair of second legs 5 are also pivotally connected to the side plate 8. The top ends are connected to a horizontal handle 5a, and the bottom ends are A roller 9 is respectively pivotally connected. One end of each connecting piece 6 is pivotally connected to the second leg 5 close to the roller 9, and the other end is combined with the platform 3 in a way that can slide in the chute 3a of the platform 3. Each telescopic cylinder 7 The two ends of each are pivotally connected between the bottom surface of the platform 3 and the second leg 5 respectively.

When the tripod 2 is closed, it is convenient for people to roll the roller 9 on the ground and drag the platform saw 1 to change the working position, but when the tripod 2 is to be erected, people must first pull out the positioning pin 4a from the first hole 3b and pull out the first leg 4 outwards, then insert the positioning pin 4a into the second hole 3c to fix the first leg 4, after that, people must hold the handle 3d of the platform 3 and lift it up, and then During the lifting process, although the auxiliary thrust generated by the telescopic cylinder 7 can be used to gradually expand the second leg 5 and the connecting piece 6, people still need to apply considerable lifting force to resist the weight of the platform saw 1, so its operation It is not convenient; secondly, in the process of lifting, although people can stretch their feet to the bottom of the platform 3 and step on the pedal 6a fixed on the connecting piece 6 to help the expansion of the second leg 5, if the lifting force is not enough to resist When the weight of the platform saw 1 or careless operation causes the platform 3 to collapse, the platform 3 may crush the legs. Therefore, the folding structure of the tripod 2 is not a perfect and practical design.

Contents of the invention

In order to improve the above shortcomings, the main purpose of the present invention is to provide a support structure for table-top tools, which has the advantages of safe use, convenient operation and stable structure.

In order to achieve the above-mentioned purpose, the supporting structure of a table-top tool provided by the present invention includes an upper frame on which the table-top tool is combined, the upper frame has a front end and a rear end, and the front end and the rear end A first pivot point, a second pivot point and a third pivot point are provided in sequence between the ends; a folding mechanism supports the upper frame and can be operated between an unfolded position and a folded position. The mechanism includes: a pair of first legs, one end of which is pivotally connected to the first pivot point of the upper frame, and the opposite end forms an abutment end that can be in contact with the ground; a pair of second legs, one end of which is pivotally connected to the The second pivot point of the upper frame is respectively connected with a roller that can roll on the ground at the opposite end; a pair of first connecting parts has a first end and a second end respectively, and the first end is pivotally connected to the The third pivot point of the upper frame; a pair of second connecting parts, one end of which is pivotally connected to the second end of the first connecting part, and the other end is pivotally connected to the middle part of the second leg; and a pair of third connecting parts, One end is pivotally connected to the near middle part of the first connecting piece, and the other end is pivotally connected to the near middle part of the first leg; when the folding mechanism is in the unfolded position, the first leg and the second leg are arranged in a staggered manner. When operating toward the retracted position, the first, second and third connecting parts together drive the second leg to move closer to the first leg, and when in the retracted position, the roller approaches the abutting end of the first leg.

Description of drawings

Fig. 1 is a schematic diagram of an existing collapsible tripod structure;

Fig. 2 is a schematic diagram of the tripod in Fig. 1 being folded;

FIG. 3 reveals a schematic diagram of the tripod in FIG. 2 changing from the folded state to the unfolded state;

Fig. 4 is an exploded perspective view of a support structure of a table-top tool according to a preferred embodiment of the present invention;

5 to 9 show that the folding mechanism is operated to transform from the unfolded position to the folded position;

Figure 10 reveals that the abutment end of the first leg directly contacts the ground;

Figure 11 reveals that a stopper is arranged laterally between the two first legs;

Fig. 12 discloses a perspective view of another locking mechanism and its matching support structure, revealing that the second hook keeps the first leg and the second leg in the unfolded position in a staggered state;

Fig. 13 discloses that the second hook part is disengaged from the second fixing part, so that the folding mechanism can be operated and folded;

FIG. 14 discloses that the first hook portion keeps the first leg and the second leg in the folded position close together.

Detailed ways

The preferred embodiments of the present invention will be cited below, and will be described in detail in conjunction with the accompanying drawings. 4 to 9 show a supporting structure 100 of a preferred embodiment of the present invention, the supporting structure 100 is combined with a table-type tool (such as a platform saw 200) and mounted on the ground 300, which includes an upper frame 10, a The folding mechanism 20, a pair of rollers 30, a pair of adjustment parts 40 and a locking mechanism 50 supporting the upper frame 10, wherein:

The upper frame 10 is composed of a pair of separated and parallel crossbars 11, and has a front end 10a and a rear end 10b, each crossbar 11 is sequentially provided with a first pivot point between the front end 10a and the rear end 10b 12. A second pivot point 13 and a third pivot point 14, the front end of the cross bar 11 forms a handle 15 bent downwards to facilitate people's hand holding, and the platform saw 200 passes through a plurality of fixing pins 16 And be locked in cross bar 11.

The folding mechanism 20 can be operated between the unfolded position P1 in FIG. 5 and the retracted position P2 in FIG. When the mechanism 20 is in the retracted position P2, the upper frame 10 is generally oriented vertically. The aforementioned folding mechanism 20 includes a pair of first legs 21, a pair of second legs 22, a pair of first connecting parts 23, a pair of second connecting parts 24, a pair of third connecting parts 25 and a bridging part 26, wherein :

One end of each first leg 21 is pivotally connected to the first pivot point 12 of the upper frame 10 and located inside the cross bar 11 , and the opposite end is continuously bent to form an abutment end 21a and a guide portion 21b, and the first leg 21 is near the middle The part has a connecting point 21c; when the folding mechanism 20 is unfolded, the guide part 21b forms an acute angle θ1 with the ground 300, and when the folding mechanism 20 is folded, it touches the ground 300, so that the platform saw 200 stands upright (refer to FIG. 8 );

One end of each second leg 22 is pivotally connected to the second pivot point 13 of the upper frame 10 and is located outside the cross bar 11, and the opposite end is connected to a roller 30, and the second leg 22 has a connection point 22a near the middle, as shown in Figure 6 In the state shown, the first leg 21 and the second leg 22 are arranged alternately;

Each first connecting member 23 has a first end 23a and a second end 23b. The first end 23a is pivotally connected to the third pivot point 14 of the upper frame 10 and is located inside the crossbar 11. Near the middle part thereof has a connection point 23c;

Each second connecting member 24 is interposed between the first leg 21 and the second leg 22, one end of which is pivotally connected to the second end 23b of the first connecting member 23, and the other end is pivotally connected to the connecting point 22a of the second leg 22. Please cooperate with the state shown in Figure 6. When the folding mechanism 20 is unfolded, its first connecting piece 23 is roughly parallel to the second leg 22, and its second connecting piece 24 is roughly parallel to the cross bar 11, which together form a parallel In the four-bar linkage mechanism, at the same time, the side end 23d of the first connecting member 23 is in contact with the surface of the first leg 21, and the first connecting member 23 and the first leg 21 are approximately at a right angle θ2, thereby making The unfolded folding mechanism 20 can support the platform saw 200 more stably;

One end of each third connecting member 25 is pivotally connected to the connecting point 23c of the first connecting member 23, and the other end is pivotally connected to the connecting point 21c of the first leg 21. The third connecting member 25 not only strengthens the connection between the first leg 21 and the first leg. The stability between the parts 23, and in the folding process of the folding mechanism 20 (please refer to Fig. 6 to Fig. 8), together with the first connecting part 23 and the second connecting part 24, the second leg 22 is driven to The first legs 21 move closer together, and when reaching the fully retracted position P2 shown in FIG. 9 , the roller 30 approaches the contact end 21a of the first legs 21;

The two ends of the bridging member 26 are respectively fixed to the two second legs 22 and close to the rollers 30, which not only strengthens the stability between the two second legs 22, but also facilitates people to fold or unfold the support structure 100 during operation. When you step on it, you can effectively control the rhythm of folding or unfolding with the force of your hands.

In the above structure, when people hold the handle 15 with their hands, and use the first leg 21 as the main support to gradually knock down the platform saw 200, as the handle 15 continues to be lifted and the folding mechanism 20 is folded , and with the help of the weight of the platform saw 200 in good time, the platform saw 200 can be easily changed from the horizontal placement to the upright placement (please cooperate with Figure 9), so that people can change their working positions. And when people press down the handle 15, the folding mechanism 20 will unfold again and drive the platform saw 200 to return to the workable state of horizontal placement (please cooperate with FIG. 6). The above-mentioned folding and unfolding operation method can avoid the potential danger caused by insufficient hand force or careless operation in the aforementioned existing tripod 2 structure. Therefore, the structure of this embodiment is not only safe in operation, but also convenient in operation Advantages of solid structure.

The structure of this embodiment can be further assembled with an adjustment member 40 near the abutting end 21a of the first leg 21. The adjustment member 40 has a threaded body 40a passing through the first leg 21, and a head 40b that can touch the ground. 300 , as shown in FIG. 6 , by turning the threaded body 40a of the adjusting member 40 forward or backward relative to the first leg 21 , the height difference of the support structure 100 can be fine-tuned to achieve a stable purpose. It should be noted that the above-mentioned adjustment member 40 is an additional component whose purpose is to make the support structure 100 more practical, and it is not an indispensable component of the support structure 100, so it can be omitted according to the needs, and the length of use is slightly longer. It is only necessary for the first leg 21' to directly touch the ground 300, as shown in FIG. 10 .

Fig. 11 further reveals that the support structure 100 further includes a baffle 27 which is an elongated plate body, and the baffle 27 straddles and is fixed on the position near the connection point 21c of the two first feet 21, in addition to strengthening the two first In addition to the stability between the legs 21 , when the folding mechanism 20 is at the unfolded position P1 , it provides a stop effect on the first connecting member 23 , so that the use of the support structure 100 is more stable and safe. It should be noted that the stopper 27 is not limited to the shape of the above-mentioned plate body, and it can also be a block-shaped object directly fixed on the first leg 21 for only providing a stopper effect.

Please also refer to FIG. 4 and FIG. 9 , the locking mechanism 50 of this embodiment includes a buckling member 51, a biasing member that is a coil spring 52, and a fixing member 53 protruding from the outside of the cross bar 11. The buckling The piece 51 passes through the coil spring 52 via a pivot pin 17 and then pivots on one of the second legs 22, and then pivotally connects to the second leg 22. The buckling part 51 forms a hook at the two ends of the pivot point respectively. 51a and the lower pressing portion 51b, when the second leg 22 is almost close to the first leg 21 (see FIG. 8), the outer arc surface of the hook portion 51a of the fastener 51 will guide the front end of the fastener 51 to pass over the fixing member 53, At this time, the biasing force provided by the coil spring 52 urges the hook portion 51 a of the engaging member 51 to hook the fixing member 53 downward, thereby preventing the first leg 21 from being separated from the second leg 22 , thereby increasing the safety of use. Conversely, when people apply an external force to press down the pressing portion 51b, the hook portion 51a will be forced to break away from the fixing member 53, so that the folding mechanism 20 can be operated and unfolded again.

FIG. 12 discloses another supporting structure 100' with which the locking mechanism 60 cooperates. The supporting structure 100' has substantially the same components as the aforementioned supporting structure 100, except that the first leg 21 is instead connected to the cross bar 11. On the outside, the second leg 22 is changed to be connected to the inner side of the cross bar 11 , and the first connecting member 23 is changed to be connected to the outer side of the cross bar 11 instead. The locking mechanism 60 includes a first fastening part 61, a second fastening part 62, a linking part 64, a first fixing part 65 and a second fixing part 66, wherein:

The first fastening part 61 and the second fastening part 62 are axially arranged on the same second leg 22, and respectively form a first hook part 61a and a second hook part 62a at the front end. The first fastening part 61 is further provided with a lower pressing portion 61b on the side opposite to the first hook portion 61a;

The linkage 64 is a rod body, one end of which is pivotally connected to the first buckling part 61 near the pressing part 61b, and the other end is pivotally connected to the second buckling part 62 near the second hook part 62a;

The first fixing member 65 is an elongated plate body and its two ends are affixed to the two first connecting members 23, and the second fixing member 66 is also an elongated plate body and its two ends are affixed to the two first legs 21. .

When the above-mentioned locking mechanism 60 is at the unfolded position P1 of the supporting structure 100 ′, the second hook portion 62 a of the second buckling part 62 hooks the second fixing part 66 , thereby preventing the first leg 21 from contacting the second fixing part 66 . The legs 22 are clamped to improve the safety of use, and when the support structure 100' is to be folded, people can step on the pressing part 61b of the first fastening part 61 to pass through the linkage part 64 And take the second hook portion 62a of the second fastening member 62 away from the second fixing member 66 (please refer to FIG. 13 ), then, take advantage of the situation to pull down and fold the support structure 100 ′, and put the roller 30 close to the first leg 21 When the abutting end 21a (please refer to FIG. 14 ), the first hook portion 61a is biased by the biasing force provided by the coil spring (not shown) installed between the first buckle 61 and the second leg 22. And when the support structure 100' is in the retracted position P2, it is sure to hook the first fixing part 65, so as to prevent the first leg 21 and the second leg 22 that are close together from being separated; The pressing portion 61b of the first hook portion 61a can be separated from the first fixing member 65, so that the support structure 100' can be unfolded again.

The above descriptions are only preferred feasible embodiments of the present invention, and all equivalent structural changes made by applying the description of the present invention and the scope of the patent application should be included in the protection scope of the claims of the present invention.

Claims (9)

1. the supporting construction of a table-board tool is placed on ground, it is characterized in that, comprises:

One upper frame, in conjunction with on it, this upper frame has a front end and a rear end for table-board tool, and between this front end and this rear end, be provided with one first pivoting point in regular turn, one second pivoting point and one the 3rd pivoting point;

One folding mechanism in order to supporting this upper frame, and can be operated between expanded position and stowed position, when folding mechanism was in expanded position, this upper frame was horizontal alignment, when being in stowed position in folding mechanism, this upper frame is vertical orientated, and this folding mechanism includes:

A pair of first leg, this end to first leg is articulated in first pivoting point of this upper frame, and a relative end forms an abutment end that contacts with ground;

A pair of second leg, this end to second leg is articulated in second pivoting point of this upper frame, and a relative end respectively is equipped with the roller in ground surface;

A pair of first connector distinctly has one first end and one second end, and this first end is articulated in the 3rd pivoting point of this upper frame;

A pair of second connector, second end of the one end and first connector articulates, and the other end is articulated in the second leg middle part; And

A pair of the 3rd connector, one end are articulated in the first connector middle part, and the other end is articulated in the first leg middle part;

When folding mechanism is in expanded position, first leg and second leg are staggered and are provided with, and when being operated toward stowed position in folding mechanism, first, second and the 3rd connector drive second leg in the lump and draw close toward first leg, and when stowed position, roller is near the abutment end of first leg;

The supporting construction of described table-board tool, wherein, described upper frame comprises the cross bar that pair of parallel is provided with, described cross bar top is in conjunction with table-board tool, each cross bar has this first pivoting point in symmetric position, this second pivoting point and the 3rd pivoting point, first leg is linked to the cross bar inboard, second leg is linked to the cross bar outside, first connector is linked to the cross bar inboard or first leg is linked to the cross bar outside, second leg is linked to the cross bar inboard, and first connector is linked to the cross bar outside, and this folding mechanism is when expanded position, first connector is parallel to second leg, and second connector is parallel to cross bar.

2. the supporting construction of table-board tool according to claim 1 is characterized in that, described a pair of first leg has continue this abutment end and the guide portion of bending outwardly, when upper frame is vertical orientated, and this guide portion conflict ground.

3. the supporting construction of table-board tool according to claim 1 is characterized in that, also includes a latching device, remains on the state of drawing close in order to first leg and second leg of the folding mechanism that will be in stowed position.

4. as the supporting construction of table-board tool as described in the claim 3, it is characterized in that, described latching device includes a buckling piece and a fixture, this buckling piece axle pivot is on one second leg wherein, and its front end forms a hook part, this fixture is fixed on this upper frame, and when being in stowed position in folding mechanism, this fixture is caught in this hook part.

5. as the supporting construction of table-board tool as described in the claim 4, it is characterized in that, described latching device also has a bias piece and impels the hook part of this buckling piece to keep toward the predetermined direction swing, this buckling piece end of this hook part relatively is provided with a pressing down section, when folding mechanism is in stowed position, execute an external force in this pressing down section, will impel this hook part to break away from this fixture.

6. the supporting construction of table-board tool according to claim 1, it is characterized in that, comprise a latching device, this latching device has one first hook part and remains on the state of drawing close in order to first leg and second leg that will be in stowed position, and one second hook part remains on staggered state in order to first leg and second leg that will be in expanded position.

7. as the supporting construction of table-board tool as described in the claim 6, it is characterized in that, described latching device comprises one first buckling piece, one second buckling piece, one first fixture and one second fixture, this first buckling piece and second buckling piece, one coaxial pivot are in one second leg wherein, and this first buckling piece and second buckling piece, one end form this first hook part and this second hook part respectively, these first fixture two ends are individually fixed in this to first connector, these second fixture two ends are individually fixed in this to first leg, when folding mechanism is in stowed position, this first fixture is caught in this first hook part, when folding mechanism was in expanded position, this second fixture was caught in this second hook part.

8. as the supporting construction of table-board tool as described in the claim 7, it is characterized in that, described latching device also comprises a moving part and a bias piece, this moving part connects this first buckling piece and this second buckling piece, this first buckling piece end of this first hook part relatively is provided with a pressing down section, this bias piece impels first hook part of first buckling piece to keep toward the predetermined direction swing, when folding mechanism is in stowed position, execute an external force in this pressing down section, to impel this first hook part to break away from this first fixture, when folding mechanism is in expanded position, execute an external force in this pressing down section, will impel this second hook part to break away from this second fixture.

9. the supporting construction of table-board tool according to claim 1, it is characterized in that, also include at least one block piece and be fixed on this first leg, when being in expanded position in folding mechanism, first connector this block piece of conflicting, and first connector and first leg are folder and establish the right angle.

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