JPH0211155Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a conveying device for sheet materials, and more specifically, to a device that conveys sheet materials fed horizontally from the rear straight forward with high accuracy. .

(Prior art) Conventionally, for example, when manufacturing a box-shaped product from cardboard sheet materials, the sheet materials that have been formed into the unfolded shape of the product and placed at the rear are fed forward one by one in a horizontal state using a paper feeder. After that, the sheet is conveyed forward by being sandwiched between the opposing belts of a belt conveyor which is disposed vertically facing each other in front of the paper feeding device and rotates forward at a speed u. Each part of the sheet material is guided upward or downward by a guide piece etc. fixed to the side of the conveyor, bent, and then glued to each part by a gluing device to join them together. It is being said.

In this case, between the paper feeder and the belt conveyor, a conveyance surface that connects the two is provided so as to face each other above and below, so that when the sheet material is delivered from behind by the paper feeder, it is applied to the circumference from above and below. It is possible to smoothly feed the sheet material to the belt conveyor by providing a pair of feed rollers that rotate in contact and feed the sheet material to the starting end of the belt conveyor at the rotation speed u of the belt conveyor.

However, with this system, the sheet material fed to the starting end of the belt conveyor is simply supported from above and below by feed rollers.
The support is almost one-point support and is unstable, so the sheet material rotates around the vertical axis due to some external factor such as vibration, and the sheet material is biased to the left and right of the conveying surface when it is transferred to the belt conveyor. May be supplied. As a result, there is a problem in that the relative positional relationship between the sheet material and the guide piece etc. becomes out of order, resulting in poor molding accuracy of each part of the sheet material.

(Purpose of the invention) The purpose of the invention is to feed the sheet material fed horizontally from the rear forward while stably supporting it at three points, so that the sheet material can be spread to the left and right of the conveyance surface. The purpose is to prevent the sheet material from shifting to one side and improve the precision of the forming process of the sheet material in the front.

(Structure of the invention) In order to achieve the above object, the solution means of the invention is a sheet material conveying device that conveys sheet materials fed in a horizontal state from the rear to the front. a drive roller that is rotatably supported by the frame member so that its outer circumferential surface contacts a horizontal conveyance surface set between the frame members from below; An idle roller is pivotally supported by a frame member behind the drive roller, and the front end is pivotally supported by the frame member so as to be able to swing vertically, and the rear end is slightly lifted upward by a set spring and biased. The set arm is held, the feed roller is pivotally supported at the rear end of the set arm, and is rotationally driven in circumferential contact with the drive roller when the rear end of the set arm is lowered; It is pivotally supported on a shaft so as to be able to swing in the vertical direction, and its rear end is formed into a fork shape, and the fork-shaped rear end is urged downward by a push spring to move the rear end downward. a press arm having a stopper portion for stopping the feed roller at a predetermined position; When descending, a pair of press rollers contact the idle roller before contacting the feed roller, and their upper ends engage with the set arm, and as they move back and forth in the vertical direction, they touch the rear end of the set arm. The sheet material is fed from the front on the conveying surface so that the front part is positioned on the drive roller, and is pressed and clamped by the descending press roller and the idle roller, and then the sheet material is The set arm further descends against the biasing force of the shovel spring, and the feed roller and drive roller descend together with the set arm to grip and convey the material forward.

As a result, the sheet material, which is fed from the front on the conveying surface so that the front part is positioned on the drive roller, is first pressed and clamped at two points by the press roller and the idle roller, and the sheet material is rotated around the vertical axis of the sheet material. By suppressing the rotation and then pulling forward the portion in front of the midpoint between the two points with a feed roller and a drive roller, the sheet material is conveyed forward without shifting to the left or right of the conveyance surface.

(Effect of the invention) Therefore, according to the invention, in a sheet material conveying device that transports a sheet material fed in a horizontal state from the rear to the front, the front portion is moved from the front on the conveying surface onto the driving roller. After the sheet material is pressed and clamped at two points by a descending press roller and an idle roller to suppress the rotation of the sheet material around the vertical axis, the feed roller and drive descend together with the set arm which further descends. Since the sheet material is held between the rollers and conveyed forward, it is possible to prevent the sheet material from shifting to the left or right of the conveyance surface when conveying it forward, and it is possible to improve the precision of the forming process of the sheet material in the front. It is possible.

(Example) Hereinafter, an example as a specific example of the technical means of the present invention will be described in detail based on the drawings.

In the following description, the present invention will be described in the case where it is applied to an apparatus for manufacturing a case file from sheet material, which is arranged in a drawer of an office cabinet or the like and is used to store documents and the like.

FIGS. 1 and 2 show a case file A, which has a narrow bottom surface a whose longitudinal sides extend left and right and whose central part in the front and back direction is formed into a chevron shape, and A rectangular front part b and a rear part c are erected at the front and rear ends of the bottom part a,
Narrow side surface portions d, d whose long sides extend vertically and are inwardly concave in the front-back direction to form a mountain shape, and whose front and rear ends are connected to both ends of the front and rear surface portions b, c.
The front part b is disposed in a drawer of an office cabinet, etc., with the front part b facing the pull side, and the front part b,
Documents and the like are stored between the spaces c, and the amount of documents stored can be freely changed by expanding the front and rear storage widths by bending and stretching the bottom portion a and the side portions d.

FIG. 3 shows a sheet material B as a material for the case file A formed into the developed shape of the case file A. That is, the sheet material B
The front part b and the rear part c are connected to the front and rear of the bottom part a, which has a folding line ta in the longitudinal direction at the center in the front-rear direction, through folds b and c, and the front part b
And the side pieces are attached to both ends of the rear part c at corresponding positions in the front and rear parts b and c through folds ₁ and _2, respectively.
d ₁ and d ₂ are connected in series, and a gluing piece e is connected to the side ends of both sides d ₁ and d ₁ of the rear surface part b via the folding line te, and Fold the front and back parts b and c at the fold lines b and c, fold the bottom part a into a chevron shape at the fold line a of the bottom part a, and fold the side pieces d ₁ and d ₂ of the front and rear parts b and c.
Fold inward at _{points 1} and ₂ , fold the glued piece e along the folding line te, glue it to the side piece _d2 of the rear face part c, and attach the side face part with the side pieces _d1 and _d2 of the front and rear faces b and c. d.

FIG. 4 shows a case file manufacturing apparatus M as an embodiment of the present invention. The manufacturing apparatus M receives sheet material B supplied from its starting end (right end in FIG. 4).
is conveyed forward (to the left in the figure) as shown by the arrow in the figure, and each portion a of the sheet material B is formed and sent out from the terminal end (left end in Figure 4).

Reference numerals 1 and 1 are frame members made of thick steel plates that are erected in parallel on the left and right, and a sheet material B is attached at the starting end of the frame member.
A paper feeding device 10 is provided for feeding forward one sheet at a time. As shown in FIGS. 4 and 5, the paper feeding device 10 includes a chain conveyor 101 that is vertically installed at the front and rear ends and rotates upward, and a chain conveyor 101 that is attached to the chain conveyor 101 at the front and rear ends, and a chain conveyor 101 that rotates upward. A lift plate 102 is stacked with sheet materials B with the front surface b facing forward, and a chain conveyor 10 is installed so that the uppermost sheet material B is positioned at a predetermined height position.
A control device (not shown) that controls the circulation of 1...;
A slider 103 is provided above the lift plate 102 and reciprocates in the front and back direction at a predetermined period T via a piston crank mechanism, and a slider 103 is attached to the lower side of the slider 103 corresponding to the predetermined height position. Distack feeder 1 that moves forward from the rear stop position and holds the uppermost sheet material B by vacuum suction while reaching the front stop position.
04, the sheet materials B on the lift plate 102 are suctioned and held in sequence by the stack feeder 104 located at the rear stop position, starting from the top one, and transported by the forward movement of the slider 103, and then transferred to the front stop position. By opening it at , it is configured to intermittently feed forward with a period T in a horizontal state with the front surface b facing forward.

Note that 105 is a regulating member for regulating the sheet material B to a predetermined position, and is provided so as to be movable left and right by an adjusting device 106 to correspond to sheet materials B having various shapes.

In front of the paper feeding device 10, a pre-stage conveyance device 20 is arranged which conveys the sheet material B supplied by the paper feeding device 10 vertically downward from the front. The first-stage conveyance device 20 is provided at its starting end, takes over the supplied sheet material B, and transfers the supplied sheet material B to the frame members 1, 1.
A sheet conveying device 210 that conveys the sheet forward along a horizontal conveying surface H set in between, and a sheet conveying device 210 that is disposed in front of the sheet conveying device 210 and rotates forward at a synchronous speed v to reach the terminal end of the conveying surface H. A horizontal belt conveyor 230 that transports the sheet material B sent from
Then, the belt pulley 241 disposed in front of the horizontal belt conveyor 230 rotates along the outer periphery of the belt pulley 241 on the starting end side from the rear to the front and vertically downward at a synchronous speed v to convey the sheet material B from the horizontal front to the vertically downward. It is composed of a vertical belt conveyor 240.

Vertical belt conveyor 2 of the above-mentioned front-stage conveyance device 20
Below the vertical belt conveyor 240, a U-shaped receiving member 30 that opens upward as shown in FIG. The falling sheet material B is positioned at a predetermined position and held vertically with part b facing downward.

A bottom folding device 40 is disposed in front of and behind the receiving member 30, which folds the front and rear surface portions b and c of the sheet material B vertically supported by the receiving member 30, and folds back the bottom surface portion a. That is, as shown in FIG. 4, 401 and 402 are the vertical belt conveyors 2.
40 and the receiving member 30 so as to be movable in the front and rear directions. At the rear end, slider 40
The slider 403 is slidably provided on a slide rail 404 extending in the front-rear direction, and is connected to a first drive device 405 consisting of a piston crank mechanism. The device 405 reciprocates back and forth with a period T.

On the other hand, the vertical belt conveyor 240 and the receiving member 3
The above-mentioned bending plates 401, 402 are located in front between
A narrow folding plate 420 with a long side extending left and right is disposed facing each other. The folding plate 420
is fixedly attached to the lower end of a swinging arm 421 whose upper end is pivotally supported by the frame members 1, 1 so as to be able to swing in the front-rear direction, and the swinging arm 421 is connected to a second drive unit consisting of a link mechanism. The swing arm 421 is connected to a device 422 and is swung back and forth with a period T by the second drive device 422, and when the bending plates 401 and 402 start to bend a fold by moving forward, the swing arm 421 rotates rearward to position its rear end at a folding position in front of the intermediate position of the front end of the folding plates 401, 40.
When 2 moves further forward, the swing arm 421
is configured to rotate forward and position the rear end portion at a retracted position above the folding position in front of the folding position.

Thus, when the sheet material B is vertically supported by the receiving member 30, the sheet material B forms a bending plate 40 in which the two folds b and c of the bottom surface portion a of the sheet material B move forward.
1,402, the front and rear surface parts b and c are bent backward, and the rear end of the folding plate 420 with the folding line ta of the bottom part a positioned at the folding forming position By being pressed backward, the bottom part a is folded back into a chevron shape, and as the folding plate 420 swings to the retracted position, the bottom part a with no inclusions on the front side continues to move forward, and the front end of the folding plate is moved forward. The folds b and c are folded according to the section, and the sheet material B is then projected forward in a horizontal state with the folded bottom section a facing forward.

In front of the bottom folding device 40, there is disposed a rear conveyance device 50 that conveys the sheet material B projected from the bottom folding device 40 horizontally forward.
The latter-stage conveyance device 50 includes a central belt conveyor 501 which is disposed vertically opposite to each other at the center in the left-right direction between the frame members 1 and 1 and rotates forward at a synchronous speed v, as shown by the broken line in FIG. It consists of side belt conveyors 502, 502 which are disposed vertically opposite to each other on the left and right sides of the front stage of the central belt conveyor 501 and rotate forward at a synchronous speed v,
The sheet material B, in which the rear surface part c is folded over the front surface part b, is held between opposing belts and conveyed horizontally forward.

Folding and folding devices 60 and 60 for folding the side pieces d ₁ and d ₂ of the sheet material B and folding back the gluing piece e are arranged on both sides of the middle of the latter conveyance device 50 . That is, the latter conveyance device 5
Although not shown, the side pieces d 1 and d 2 of the front and rear surfaces b and c of the sheet material B to be conveyed forward and the gluing piece e are attached to the frame members ₁ and ₁ on the starting end side of the sheet material B. A guide member is attached between the surface portions b and c to guide and fold through the fold lines ₁ and ₂ and the fold line te.

Furthermore, in front of the folding and turning device 60 on both sides of the latter conveyance device 50, there is a gluing device 7 for gluing the gluing piece e to the corresponding other side piece _d2 .
0 is placed. That is, although not shown, a locking member for holding the glued piece e in a horizontal state is attached to the front of the guide member of the bending and folding device 60, and above the locking member is attached a locking member that holds the glued piece e in a horizontal direction. A gluing roller 703 is disposed which is rotatably supported on a spindle of the gluing roller 703 and is driven to rotate at a synchronous speed v while contacting the upper surface of the gluing piece e whose peripheral edge is held in the horizontal state.
A reservoir 704 for supplying adhesive to the peripheral edge of the gluing roller is disposed behind the gluing roller 3, so that the adhesive is applied to the gluing piece e.

Further, in front of the gluing roller 703, a joining roller 705 is disposed which is pivoted on the frame member 1 and presses inward the folding line ta of the bottom surface a of the sheet material B which is conveyed forward at the peripheral edge 705a. and
By joining the gluing piece e coated with the adhesive to the corresponding other side piece d ₂ , the side pieces d ₁ and d ₂ form a side surface d.

Furthermore, a pressing device 80 for finishing forming the side surface portion d is disposed in front of the latter-stage conveying device 50. As shown in FIG. 4, the pressing device 80 consists of a belt conveyor that is disposed vertically opposite to each other inside each frame member 1 and rotates forward at a synchronous bottom level v, and the bottom part a is inwardly chevron-shaped. By holding and pressing the left and right ends of the folded sheet material B with a belt, the adhesion between the gluing piece e and the side piece _d2 is fixed, and the folds ₁ and ₂ and the folding line ta are further blended. It is configured to be sent forward from the terminal end.

Then, in the sheet conveying device 201,
In FIGS. 5 to 7, reference numeral 213 denotes a drive roller that is rotatably supported by the frame members 1, 1 so that its outer peripheral surface contacts the conveying surface H between the frame members 1, 1 from below, and the drive roller 213 is Behind the roller 213, an idle roller 218 is connected to the frame member 1, so that its outer peripheral surface contacts the conveyance surface H from below.
It is pivoted on 1.

Above the conveying surface H, the front end portion is pivotally supported by the frame members 1, 1 so as to be able to swing freely in the vertical direction, and the rear end portion is slightly upwardly supported by a set spring 211 interposed between the frame member 1 and the frame member 1. A set arm 212 is provided which is lifted up and held under pressure. A feed roller 214 is pivotally supported at the rear end of the set arm 212.
When the rear end of 12 is lowered, the drive roller 21
3 and is positioned so as to be rotationally driven.

A press arm 217 is disposed behind the feed roller 214. The press arm 2
17 has a front end supported on a spindle of a feed roller 214 so as to be able to swing vertically, and a rear end formed in a forked shape, and the forked rear end is connected to the set arm 212. It is urged upward by a push spring 215 stretched between the
It also has a stopper portion 216 that stops the downward movement of the rear end portion at a predetermined position. The press arm 2
The feed roller 2 is installed at the rear end of each of the feed rollers 17 and 17, respectively.
A pair of press rollers 219, 219 are pivotally supported at positions spaced apart from 14 at equal intervals in the left-right direction and opposite to each other in the left-right direction. It is configured to be in circumferential contact with the idle roller 218.

Further, on the left side of the set arm 212, a press rod 220 is disposed, which is reciprocated in the vertical direction by a cam that slides on the lower end.
The set arm 212 is engaged with the upper surface of the middle part of the set arm 212 when the set arm 212 moves downward in synchronization with the completion of the forward movement of the slider 103 to the forward stop position.
I'm trying to push it down.

Therefore, as shown in FIG. 8a, the slider 10
During the forward movement to the front stop position of No. 3, the feed roller 214 and the press rollers 219, 219 are both held above the conveyance surface H by the lifting of the rear end of the set arm 212, and in this state they are held above the conveyance surface H. From the front, the front part b is the drive roller 213
The sheet material B supplied so as to be positioned above the press roller 21 that descends, as shown in FIG. 8b.
9, 219 and the idle roller 218, the feed roller 214 and the drive roller 213 descend together with the set arm 212, which further descends against the biasing force of the push spring 215, as shown in FIG. 8c. It is held between the two and transported forward.

Therefore, in the above embodiment, when the sheet material B fed forward by the paper feeding device 10 is taken up by the sheet conveying device 210, it is first pressed at two points by the press rollers 219, 219 and the idle roller 218. The sheet material B is held between the two points and prevented from rotating around the vertical axis, and is then pulled forward by the feed roller 214 and the drive roller 213 in front of the midpoint between the two points, so that the sheet material B is prevented from shifting to the left or right of the conveyance surface H. The folds b and c of the bottom surface a of the sheet material B and the folding line ta are perpendicular to the conveyance direction, and the folds ₁ and ₂ of the side pieces d ₁ and d ₂ and the folding line te of the gluing piece e are perpendicular to the conveyance direction. Therefore, the folds b, c, ₁ , ₂ and fold lines ta, te can be formed at predetermined positions with high accuracy.

In the above embodiments, the present invention was applied to a case file manufacturing device, but it can be widely used, for example, in printing devices, packaging box manufacturing devices, and various other sheet material conveyance devices. It is.

Further, the sheet material is not limited to cardboard, and it goes without saying that it can also be used in devices that convey various sheet materials such as those made of metal or resin.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of the case file, Fig. 2 is a sectional view taken along the line - - of Fig. 1, Fig. 3 is a plan view of the sheet material, and Fig. 4 is a left frame. An overall schematic side view of the case file manufacturing apparatus with parts removed, FIG. 5 is an enlarged plan view of the paper feeding device and the sheet conveying device, FIG. 6 is an enlarged left side view of the sheet conveying device, and FIG. 7 is the sheet conveying device. The enlarged right side view of the apparatus and FIGS. 8a to 8c are explanatory views showing the operation of the sheet conveying apparatus. B... Sheet material, 1... Frame member, 210
... Sheet conveyance device, 211 ... Set spring, 212 ... Set arm, 213 ... Drive roller, 214 ... Feed roller, 215 ... Push spring, 216 ... Stopper section, 21
7... Press arm, 218... Idle roller, 219... Press roller, 220... Pressing rod, H... Conveyance surface.

Claims (1)

[Scope of utility model registration request] This is a sheet material conveyance device that conveys sheet material supplied in a horizontal state from the rear to the front, and includes frame members arranged on the left and right, and an outer peripheral surface on a horizontal conveyance surface set between the frame members. a drive roller that is rotatably supported by a frame member so as to circumferentially contact the conveyance surface from below; an idle roller that is pivotably supported by the frame member behind the drive roller such that its outer circumferential surface contacts the conveyance surface from below; and a front end. The set arm is pivotally supported by the frame member so as to be able to swing vertically, and the rear end of which is lifted and biased slightly upwardly by a set spring; A feed roller is rotatably driven in circumferential contact with the drive roller when its rear end is lowered; a press arm having a forked rear end urged downward by a push spring and a stopper portion for stopping the downward movement of the rear end at a predetermined position; A pair of shafts are supported at the end portions of the feed rollers at equal intervals in the left-right direction and at opposite positions, and contact the idle rollers before the feed rollers contact the feed rollers when the rear end of the set arm descends. and a press rod whose upper end engages with the set arm and presses down the rear end of the set arm as it reciprocates in the vertical direction. After the sheet material, which is fed so as to be positioned at 1. A conveying device for sheet material, characterized in that the sheet material is pinched and conveyed forward.